/* roulang page: index */
:root{
  --primary-700:#1A5A80;
  --primary-600:#21688F;
  --primary-500:#2C7AA5;
  --primary-100:#DCEDF5;
  --primary-50:#EDF6FA;
  --secondary:#3FA39A;
  --accent:#E9A13B;
  --surface:#ffffff;
  --canvas:#F6FAFC;
  --text-strong:#17324D;
  --text-body:#3B5266;
  --text-muted:#7A8FA0;
  --border:#E3ECF3;
  --footer-bg:#102A40;
  --shadow-xs:0 1px 2px rgba(23,50,77,.06);
  --shadow-sm:0 4px 16px -8px rgba(23,50,77,.12);
  --shadow-md:0 16px 36px -16px rgba(23,50,77,.18);
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;
  --radius-xl:20px;
  --container:1280px;
  --space-lg:88px;
  --space-md:56px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans CN","Noto Sans CJK SC",sans-serif;
  line-height:1.75;
  background:var(--canvas);
  color:var(--text-body);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
input,button,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
.container{max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding-top:var(--space-lg);padding-bottom:var(--space-lg)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--primary-600);
  background:var(--primary-50);
  border:1px solid var(--primary-100);
  padding:8px 16px;border-radius:999px;
  margin-bottom:20px;
}
.eyebrow-dot{width:6px;height:6px;border-radius:50%;background:var(--primary-500)}
.section-title{
  font-size:clamp(28px,3.4vw,36px);
  line-height:1.3;
  color:var(--text-strong);
  letter-spacing:.01em;
  font-weight:800;
}
.section-sub{
  margin-top:14px;
  font-size:16px;
  color:var(--text-muted);
  line-height:1.8;
  max-width:720px;
}
.section-head.center .section-sub{margin-left:auto;margin-right:auto}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;
  border-radius:var(--radius-sm);
  font-size:16px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:all .18s var(--ease);
  text-align:center;white-space:nowrap;
}
.btn-primary{background:var(--primary-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--primary-700);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-xs)}
.btn-primary:focus-visible{outline:3px solid rgba(44,122,165,.4);outline-offset:2px}
.btn-secondary{background:transparent;color:var(--primary-600);border-color:rgba(44,122,165,.45)}
.btn-secondary:hover{background:var(--primary-50);border-color:var(--primary-500);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(0)}
.btn-secondary:focus-visible{outline:3px solid rgba(44,122,165,.3);outline-offset:2px}
.btn-light{background:#fff;color:var(--primary-700)}
.btn-light:hover{background:var(--primary-50);transform:translateY(-2px)}
.btn-light:active{transform:translateY(0)}
.btn-lg{height:52px;padding:0 32px;border-radius:10px}
/* header */
.site-header{
  position:sticky;top:0;z-index:100;
  height:72px;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  max-width:var(--container);
  height:100%;
  margin:0 auto;
  padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:21px;font-weight:800;color:var(--text-strong);
  letter-spacing:-.01em;
  min-height:72px;line-height:1;
}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;
  color:#fff;font-size:18px;font-weight:900;
  background:linear-gradient(145deg,var(--primary-500),var(--primary-700));
  box-shadow:var(--shadow-sm);
}
.brand-text span:first-child{color:var(--primary-600);font-weight:900}
.brand-divider{color:#c4d7e3;margin:0 3px;font-weight:400}
.brand-sub{font-size:13px;font-weight:500;color:var(--text-muted);letter-spacing:.04em}
.main-nav{display:flex;align-items:center;gap:4px;height:72px}
.nav-link{
  display:inline-flex;align-items:center;
  height:72px;padding:0 14px;
  font-size:15px;font-weight:500;color:var(--text-body);
  border-bottom:2px solid transparent;
  transition:color .16s ease,border-color .16s ease;
  position:relative;
}
.nav-link:hover{color:var(--primary-600)}
.nav-link.active{
  color:var(--primary-700);
  font-weight:700;
  border-bottom-color:var(--primary-600);
}
.nav-link:focus-visible{outline:2px solid rgba(44,122,165,.5);outline-offset:-2px;border-radius:4px}
.header-actions{display:flex;align-items:center;gap:10px}
.header-entry-btn{
  height:42px;padding:0 18px;min-height:42px;
  font-size:14px;border-radius:8px;
}
.header-link-mobile{display:none;align-items:center;height:44px;font-size:14px;color:var(--primary-600);font-weight:600;padding:0 12px;border-radius:8px}
.header-link-mobile:hover{background:var(--primary-50)}
/* hero */
.hero{
  position:relative;
  background:
    linear-gradient(100deg,rgba(255,255,255,.97) 20%,rgba(237,246,250,.82) 58%,rgba(220,237,245,.86) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom:1px solid var(--border);
  overflow:hidden;
}
.hero-inner{
  max-width:var(--container);
  margin:0 auto;
  padding:92px 24px 96px;
  display:grid;
  grid-template-columns:minmax(0,1.06fr) minmax(320px,.8fr);
  gap:56px;
  align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--border);
  color:var(--text-body);
  box-shadow:var(--shadow-xs);
  font-size:13px;font-weight:500;
  padding:8px 16px;border-radius:999px;
  margin-bottom:24px;
}
.hero-badge i{
  width:8px;height:8px;border-radius:50%;
  background:var(--secondary);
  display:inline-block;
  position:relative;
}
.hero-badge i::after{
  content:"";position:absolute;inset:-4px;
  border-radius:50%;background:rgba(63,163,154,.2);
  animation:pulse 2s infinite;
}
@keyframes pulse{
  0%{transform:scale(.7);opacity:1}
  70%{transform:scale(1.8);opacity:0}
  100%{opacity:0}
}
.hero h1{
  font-size:clamp(32px,4.4vw,50px);
  line-height:1.22;
  color:var(--text-strong);
  font-weight:800;
  letter-spacing:.01em;
  margin-bottom:20px;
}
.hero-lead{
  font-size:17px;
  line-height:1.85;
  color:var(--text-body);
  margin-bottom:34px;
  max-width:580px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-note{
  display:flex;align-items:center;gap:10px;
  margin-top:26px;
  color:var(--text-muted);
  font-size:13px;
}
.hero-note i{
  width:7px;height:7px;border-radius:50%;
  background:var(--secondary);display:inline-block;
}
/* hero panel */
.hero-visual{position:relative}
.hero-panel{
  background:#fff;
  border-radius:var(--radius-xl);
  padding:28px;
  box-shadow:var(--shadow-md);
  border:1px solid var(--border);
}
.hero-panel-title{
  font-size:17px;font-weight:800;color:var(--text-strong);
  padding-bottom:16px;border-bottom:1px solid var(--border);
  margin-bottom:18px;
}
.hero-panel-title span{color:var(--primary-600)}
.hero-panel-list{display:grid;gap:12px}
.hero-panel-item{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:var(--canvas);
  border:1px solid transparent;
  border-radius:12px;
  padding:13px 16px;
  transition:all .16s ease;
}
.hero-panel-item:hover{
  border-color:var(--primary-100);
  background:var(--primary-50);
  transform:translateX(4px);
}
.hero-panel-item .left{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-strong)}
.hero-panel-item .ic{width:32px;height:32px;border-radius:9px;background:var(--primary-100);color:var(--primary-700);display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
.hero-panel-item .go{color:var(--primary-500);font-size:13px}
.hero-status-pill{
  display:inline-flex;align-items:center;
  background:var(--primary-50);border-radius:999px;
  color:var(--primary-700);
  font-size:12px;font-weight:600;
  padding:4px 10px;
}
.hero-float-tip{
  position:absolute;right:-6px;bottom:-18px;
  background:var(--primary-700);
  color:#fff;
  padding:12px 20px;
  border-radius:14px;
  font-size:13px;
  font-weight:600;
  box-shadow:var(--shadow-md);
  display:flex;align-items:center;gap:8px;
}
.hero-float-tip i{width:8px;height:8px;border-radius:50%;background:#57C7BC;display:inline-block}
/* trust bar */
.trust-band{
  background:var(--footer-bg);
  color:#fff;
  padding:26px 0;
}
.trust-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
}
.trust-item{display:flex;align-items:center;gap:14px}
.trust-item strong{
  font-size:clamp(20px,2.2vw,28px);
  font-weight:800;
  color:#fff;
  line-height:1.2;
}
.trust-item span{font-size:13px;color:rgba(255,255,255,.62);display:block;line-height:1.5;margin-top:2px}
.trust-line{width:1px;align-self:stretch;background:rgba(255,255,255,.14)}
/* latest news */
.news-section{background:#fff}
.news-list{display:grid;gap:18px;max-width:980px}
.news-card{
  display:grid;grid-template-columns:200px minmax(0,1fr) auto;
  gap:22px;
  background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  padding:14px;
  transition:all .18s var(--ease);
  box-shadow:var(--shadow-xs);
}
.news-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
  border-color:var(--primary-100);
}
.news-card-imgwrap{position:relative;border-radius:12px;overflow:hidden;background:var(--primary-50)}
.news-card-imgwrap img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.news-card:hover .news-card-imgwrap img{transform:scale(1.04)}
.news-card-main{display:flex;flex-direction:column;justify-content:center;padding:4px 0}
.news-card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}
.tag{
  display:inline-flex;align-items:center;
  background:var(--primary-50);
  color:var(--primary-700);border:1px solid var(--primary-100);
  border-radius:6px;
  font-size:12px;font-weight:600;
  padding:3px 9px;
}
.news-card-title{
  font-size:19px;font-weight:800;color:var(--text-strong);
  line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .16s ease;
}
.news-card:hover .news-card-title{color:var(--primary-700)}
.news-card-desc{
  font-size:14px;color:var(--text-muted);
  margin-top:9px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card-meta{display:flex;align-items:center;gap:12px;margin-top:10px;font-size:13px;color:var(--text-muted)}
.news-card-arrow{display:flex;align-items:center;color:var(--primary-500);font-size:18px;font-weight:300;padding:12px;transition:transform .18s ease}
.news-card:hover .news-card-arrow{transform:translateX(6px)}
.empty-state{
  background:var(--primary-50);
  border:1px solid var(--primary-100);
  border-radius:var(--radius-lg);
  padding:40px 20px;
  text-align:center;
  color:var(--text-muted);
}
.empty-icon{
  width:56px;height:56px;margin:0 auto 16px;
  border-radius:16px;
  background:#fff;
  border:1px solid var(--primary-100);
  display:flex;align-items:center;justify-content:center;
  color:var(--primary-500);
  font-size:26px;
  box-shadow:var(--shadow-xs);
}
/* service section */
.service-section{background:var(--canvas)}
.service-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:26px;
}
.service-card{
  position:relative;
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:34px 32px 30px;
  box-shadow:var(--shadow-xs);
  overflow:hidden;
  transition:all .2s var(--ease);
}
.service-card::before{
  content:"";
  position:absolute;
  width:120px;height:120px;
  border-radius:50%;
  background:var(--primary-50);
  right:-44px;top:-52px;
  opacity:.8;
}
.service-card:nth-child(2)::before{background:rgba(63,163,154,.1)}
.service-card:nth-child(3)::before{background:rgba(233,161,59,.09)}
.service-card:hover{
  box-shadow:var(--shadow-md);
  transform:translateY(-4px);
  border-color:var(--primary-100);
}
.service-card-icon{
  width:52px;height:52px;
  border-radius:14px;
  background:var(--primary-100);
  color:var(--primary-700);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:22px;font-weight:800;
  margin-bottom:22px;
  box-shadow:var(--shadow-xs);
  position:relative;
}
.service-card:nth-child(2) .service-card-icon{background:rgba(63,163,154,.14);color:#23766E}
.service-card:nth-child(3) .service-card-icon{background:rgba(233,161,59,.13);color:#B57916}
.service-card:nth-child(4) .service-card-icon{background:#fff;border:1px solid var(--primary-100);color:var(--primary-600)}
.service-card h3{
  font-size:21px;color:var(--text-strong);
  font-weight:800;letter-spacing:.01em;
  margin-bottom:10px;
}
.service-card p{
  font-size:15px;color:var(--text-body);line-height:1.8;
  margin-bottom:16px;
}
.service-link{
  font-size:14px;font-weight:600;color:var(--primary-600);
  display:inline-flex;align-items:center;gap:6px;
}
.service-link::after{content:"→";transition:transform .16s ease}
.service-card:hover .service-link::after{transform:translateX(5px)}
/* data band */
.data-band{
  position:relative;
  background:
    linear-gradient(rgba(246,250,252,.92),rgba(237,246,250,.9)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.stats-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;text-align:center}
.stats-item{padding:20px 12px;border-right:1px solid var(--border)}
.stats-item:last-child{border-right:0}
.stats-num{
  font-size:clamp(30px,3.6vw,46px);
  font-weight:900;
  color:var(--primary-700);
  line-height:1.1;
  letter-spacing:-.02em;
}
.stats-num small{
  font-size:.45em;font-weight:800;
  color:var(--secondary);
  margin-left:4px;
}
.stats-label{
  margin-top:8px;
  font-size:14px;color:var(--text-body);
  font-weight:500;
}
/* case showcase */
.case-section{background:#fff}
.case-grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:22px;
}
.case-large{grid-column:span 7;grid-row:span 2}
.case-small{grid-column:span 5}
.case-item{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--border);
  background:var(--canvas);
  box-shadow:var(--shadow-xs);
  min-height:260px;
}
.case-large{min-height:560px}
.case-item img{
  width:100%;height:100%;object-fit:cover;
  min-height:inherit;
  transition:transform .5s var(--ease);
}
.case-item:hover img{transform:scale(1.04)}
.case-mask{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(16,42,64,.84) 0%,rgba(16,42,64,.08) 52%,transparent 100%);
  display:flex;align-items:flex-end;
  padding:28px;
}
.case-content{color:#fff;max-width:480px}
.case-kicker{
  font-size:12px;color:var(--primary-100);
  border-left:3px solid var(--accent);
  padding-left:10px;
  text-transform:uppercase;
  letter-spacing:.05em;
  margin-bottom:8px;
}
.case-content h3{font-size:20px;line-height:1.4;font-weight:800;color:#fff}
.case-large .case-content h3{font-size:25px}
.case-content p{
  font-size:14px;color:rgba(255,255,255,.7);
  margin-top:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.case-entry{
  display:inline-flex;align-items:center;gap:6px;
  color:#fff;
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.26);
  border-radius:8px;
  padding:8px 16px;
  font-size:13px;
  margin-top:15px;
  width:fit-content;
}
.case-entry i{color:var(--accent)}
.case-item:hover .case-entry{background:#fff;color:var(--primary-700)}
/* solution area */
.solution-area{background:var(--canvas)}
.solution-card-wrap{display:grid;grid-template-columns:1fr 1fr;gap:26px;padding:14px 0 26px}
.solution-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:34px 32px 34px;
  box-shadow:var(--shadow-xs);
  position:relative;
}
.solution-card:hover{box-shadow:var(--shadow-sm)}
.solution-hl{
  font-size:12px;font-weight:700;color:var(--text-muted);
  letter-spacing:.05em;
}
.solution-hl i{color:var(--secondary);font-style:normal;margin-right:4px}
.solution-card h3{font-size:23px;color:var(--text-strong);font-weight:800;margin:10px 0 14px}
.solution-desc{font-size:15px;color:var(--text-body);margin-bottom:20px}
.check-list{display:grid;gap:12px}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  color:var(--text-body);font-size:15px;
}
.check-list li::before{
  content:"✓";
  flex:0 0 22px;
  width:22px;height:22px;
  border-radius:7px;
  background:var(--primary-50);
  color:var(--primary-600);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;
  margin-top:3px;
}
.solution-cta{text-align:right;margin-top:24px}
/* howto steps */
.howto-section{background:#fff}
.steps-wrap{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;position:relative}
.step-item{
  position:relative;
  background:var(--canvas);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:34px 26px;
}
.step-num{
  display:flex;align-items:center;gap:12px;
  margin-bottom:16px;
}
.step-num strong{
  width:44px;height:44px;
  border-radius:13px;
  background:var(--primary-600);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;
  box-shadow:var(--shadow-sm);
}
.step-title{
  font-size:18px;font-weight:800;
  color:var(--text-strong);
}
.step-item p{font-size:14px;color:var(--text-body);line-height:1.8}
/* faq */
.faq-section{
  background:linear-gradient(180deg,#fff 0%,var(--canvas) 100%);
}
.faq-wrap{
  max-width:820px;
  margin:0 auto;
}
.faq-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  margin-bottom:16px;
  transition:all .18s ease;
}
.faq-item[open]{
  background:var(--primary-50);
  border-color:var(--primary-500);
  box-shadow:var(--shadow-xs);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 24px;
  cursor:pointer;
  font-size:16px;
  font-weight:700;
  color:var(--text-strong);
  list-style:none;
  user-select:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  position:relative;
  width:22px;height:22px;
  flex:0 0 22px;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  top:50%;left:0;
  width:22px;height:2px;
  background:var(--primary-500);
  border-radius:2px;
  transform:translateY(-50%);
  transition:transform .2s ease,opacity .2s ease;
}
.faq-icon::after{transform:translateY(-50%) rotate(90deg)}
.faq-item[open] .faq-icon::before{transform:translateY(-50%) rotate(180deg)}
.faq-item[open] .faq-icon::after{transform:translateY(-50%) rotate(180deg);opacity:0}
.faq-body{padding:0 24px 22px;line-height:1.85;font-size:15px;color:var(--text-body)}
/* cta form area */
.cta-section{
  background:
    linear-gradient(135deg,rgba(16,42,64,.97),rgba(33,104,143,.92)),
    url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  color:#fff;
}
.cta-section .section-title{color:#fff}
.cta-section .section-sub{color:rgba(255,255,255,.74)}
.cta-wrap{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:50px;
  align-items:center;
}
.cta-intro p{
  color:rgba(255,255,255,.8);
  font-size:16px;line-height:1.9;
}
.cta-points{margin-top:24px;display:grid;gap:14px}
.cta-points li{display:flex;gap:12px;align-items:flex-start;color:rgba(255,255,255,.85);font-size:15px}
.cta-points li i{
  width:22px;height:22px;border-radius:7px;
  background:rgba(255,255,255,.14);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  flex:0 0 22px;font-style:normal;
  font-size:13px;font-weight:800;
  margin-top:4px;
}
.contact-form{
  background:#fff;
  border-radius:var(--radius-lg);
  padding:30px;
  color:var(--text-body);
  box-shadow:var(--shadow-md);
}
.form-title{
  color:var(--text-strong);
  font-size:20px;
  font-weight:800;
  margin-bottom:8px;
}
.form-sub{font-size:13px;color:var(--text-muted);margin-bottom:22px}
.form-group{margin-bottom:16px}
.form-group label{
  display:block;
  font-size:14px;font-weight:600;
  color:var(--text-strong);
  margin-bottom:6px;
}
.form-control{
  width:100%;
  height:46px;
  padding:0 14px;
  border-radius:10px;
  border:1px solid #DDE8F0;
  background:var(--canvas);
  color:var(--text-strong);
  font-size:15px;
  transition:all .16s ease;
}
.form-control:focus{
  outline:none;
  border-color:var(--primary-500);
  box-shadow:0 0 0 3px rgba(44,122,165,.18);
  background:#fff;
}
.form-control::placeholder{color:#A8BAC8}
.form-select{
  appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 12 8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%233B5266' stroke-width='1.7' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:40px;
  cursor:pointer;
}
.form-submit{
  width:100%;
  height:50px;
  border-radius:10px;
}
.form-note{font-size:12px;color:var(--text-muted);text-align:center;margin-top:12px}
/* footer */
.site-footer{
  background:var(--footer-bg);
  color:rgba(255,255,255,.72);
}
.footer-main{
  padding:64px 0 44px;
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand .brand{color:#fff;margin-bottom:14px}
.footer-about{font-size:14px;line-height:1.9;max-width:300px;margin-bottom:18px}
.footer-contact-item{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-top:6px}
.footer-col h3{
  font-size:16px;
  color:#fff;
  font-weight:700;
  margin-bottom:18px;
  padding-top:8px;
}
.footer-links li{margin-bottom:11px}
.footer-links a{
  font-size:14px;color:rgba(255,255,255,.68);
  transition:all .16s ease;
  display:inline-block;
}
.footer-links a:hover{color:#fff;transform:translateX(4px)}
.footer-links a:focus-visible{outline:2px solid rgba(255,255,255,.4);border-radius:4px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0;
  font-size:13px;
  color:rgba(255,255,255,.46);
  display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
}
.footer-bottom a{color:rgba(255,255,255,.65)}
/* mobile tab bar */
.mobile-tabbar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;z-index:200;
  height:calc(64px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--border);
  box-shadow:0 -6px 20px rgba(23,50,77,.06);
  align-items:stretch;
}
.mobile-tabbar a{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  color:var(--text-muted);
  font-size:11px;
  min-height:48px;
  transition:color .15s ease;
}
.mobile-tabbar a svg{width:23px;height:23px;display:block}
.mobile-tabbar a.active{color:var(--primary-700);font-weight:600}
.mobile-tabbar a.active .tabbar-top-line{opacity:1}
.mobile-tab-spacer{display:none;height:calc(64px + env(safe-area-inset-bottom))}
/* focus general */
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--primary-500);
  outline-offset:2px;
  border-radius:6px;
}
@media(max-width:1024px){
  .container{padding-left:20px;padding-right:20px}
  .hero-inner{
    grid-template-columns:1fr;
    padding-top:66px;padding-bottom:90px;
    gap:44px;
  }
  .hero-panel{max-width:640px}
  .case-large{grid-column:span 12;grid-row:auto;min-height:420px}
  .case-small{grid-column:span 6;min-height:240px}
  .case-grid{grid-auto-rows:auto}
  .case-small:last-child{grid-column:span 6}
}
@media(max-width:768px){
  .section{padding-top:60px;padding-bottom:60px}
  .container{padding-left:16px;padding-right:16px}
  .site-header{height:62px}
  .header-inner{height:62px;padding:0 16px}
  .brand{min-height:62px;font-size:18px}
  .brand-mark{width:32px;height:32px;font-size:15px;border-radius:8px}
  .brand-sub{display:none}
  .main-nav{display:none}
  .header-link-mobile{display:inline-flex}
  .header-entry-btn{display:none}
  .hero-inner{padding:48px 16px 72px}
  .hero h1{font-size:clamp(28px,7vw,36px)}
  .hero-lead{font-size:16px}
  .hero-actions .btn{width:calc(50% - 8px);padding:0 16px;font-size:15px}
  .trust-grid{grid-template-columns:1fr 1fr;gap:24px}
  .trust-line{display:none}
  .trust-item{background:rgba(255,255,255,.06);padding:16px;border-radius:12px}
  .news-list{gap:14px}
  .news-card{grid-template-columns:96px 1fr;gap:14px;padding:10px}
  .news-card-title{font-size:16px}
  .news-card-desc{display:none}
  .news-card-meta{flex-direction:column;align-items:flex-start;gap:4px}
  .news-card-arrow{display:none}
  .news-card-imgwrap{min-height:94px}
  .section-title{font-size:27px}
  .service-grid{grid-template-columns:1fr;gap:18px}
  .service-card{padding:26px 22px}
  .stats-wrap{grid-template-columns:1fr 1fr;gap:20px}
  .stats-item{border-right:0;padding:8px}
  .case-grid{grid-template-columns:1fr}
  .case-large{grid-column:auto;min-height:260px}
  .case-small, .case-small:last-child{grid-column:auto;min-height:220px}
  .case-mask{padding:20px}
  .solution-card-wrap{grid-template-columns:1fr;gap:16px}
  .solution-card{padding:26px 22px}
  .steps-wrap{grid-template-columns:1fr;gap:16px}
  .step-item{padding:26px 20px}
  .faq-wrap{max-width:100%}
  .cta-wrap{grid-template-columns:1fr;gap:36px}
  .contact-form{padding:24px}
  .footer-main{grid-template-columns:1fr 1fr;gap:30px;padding-top:50px}
  .mobile-tabbar{display:flex}
  .mobile-tab-spacer{display:block}
  .case-section, .solution-area, .faq-section, .howto-section{padding-bottom:60px}
}
@media(max-width:400px){
  .mobile-tabbar a{font-size:10px}
  .footer-main{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .trust-grid{grid-template-columns:1fr}
}

/* roulang page: article */
:root {
  --primary-700:#1A5A80;
  --primary-600:#21688F;
  --primary-500:#2C7AA5;
  --primary-100:#DCEDF5;
  --primary-50:#EDF6FA;
  --secondary:#3FA39A;
  --accent:#E9A13B;
  --surface:#FFFFFF;
  --canvas:#F6FAFC;
  --text-strong:#17324D;
  --text-body:#3B5266;
  --text-muted:#7A8FA0;
  --border:#E3ECF3;
  --footer-bg:#102A40;
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;
  --shadow-xs:0 1px 2px rgba(23,50,77,.06);
  --shadow-sm:0 4px 16px -8px rgba(23,50,77,.12);
  --shadow-md:0 16px 36px -16px rgba(23,50,77,.18);
  --nav-height:72px;
  --tabbar-height:64px;
  --max-width:1280px;
  --container-pad:24px;
  --font-main:"PingFang SC","Microsoft YaHei","Source Han Sans CN","Noto Sans CJK SC",-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-main);
  color:var(--text-body);
  background:var(--canvas);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style-position:inside}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding-left:var(--container-pad);padding-right:var(--container-pad)}
.skip-link{
  position:absolute;left:16px;top:-60px;z-index:200;background:var(--primary-600);color:#fff;
  padding:10px 16px;border-radius:0 0 8px 8px;transition:top .2s ease;
}
.skip-link:focus{top:0;color:#fff}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;transition:all .18s ease;
}
.btn-primary{background:var(--primary-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--primary-700);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(-1px)}
.btn-primary:focus-visible{outline:2px solid var(--primary-500);outline-offset:3px}
.btn-secondary{background:transparent;border-color:var(--primary-500);color:var(--primary-600)}
.btn-secondary:hover{background:var(--primary-50);border-color:var(--primary-600);transform:translateY(-2px)}
.btn-secondary:active{transform:translateY(0)}
.btn-light{background:#fff;color:var(--primary-700)}
.btn-light:hover{background:var(--primary-50);transform:translateY(-2px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  height:var(--nav-height);
  display:flex;align-items:center;gap:32px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--primary-600);color:#fff;border-radius:10px;
  font-weight:800;font-size:19px;letter-spacing:.02em;box-shadow:var(--shadow-xs);
}
.brand-text{font-size:19px;font-weight:700;color:var(--text-strong);letter-spacing:.01em}
.brand-divider{margin:0 6px;color:var(--border);font-weight:300}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  display:inline-flex;align-items:center;justify-content:center;
  height:var(--nav-height);padding:0 16px;
  font-size:15px;font-weight:500;color:var(--text-body);
  position:relative;transition:color .18s ease;
}
.nav-link:hover{color:var(--primary-600)}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:2px;
  background:var(--primary-500);border-radius:2px;
  opacity:0;transform:scaleX(.6);transition:all .18s ease;
}
.nav-link:hover::after{opacity:.5;transform:scaleX(.8)}
.nav-link.active{color:var(--primary-600);font-weight:600}
.nav-link.active::after{opacity:1;transform:scaleX(1)}
.header-cta{margin-left:16px}
.header-actions{display:flex;align-items:center;gap:8px;margin-left:16px}
.header-contact{margin-left:16px}

/* ---------- MOBILE TABBAR ---------- */
.mobile-tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:130;
  height:calc(var(--tabbar-height) + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  display:none;
  background:rgba(255,255,255,.96);backdrop-filter:blur(10px);
  border-top:1px solid var(--border);
  box-shadow:0 -8px 28px rgba(23,50,77,.08);
}
.tabbar-inner{display:flex;align-items:center;height:100%;max-width:600px;margin:0 auto}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:calc(var(--tabbar-height) - 8px);gap:5px;
  color:var(--text-muted);font-size:11px;font-weight:500;
  transition:color .16s ease,transform .16s ease;
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tab-item:hover{color:var(--primary-500)}
.tab-item.active{color:var(--primary-600);font-weight:600;transform:translateY(-1px)}
@supports (padding-bottom:env(safe-area-inset-bottom)){
  .mobile-tabbar{padding-bottom:env(safe-area-inset-bottom)}
}

/* ---------- Article Layout ---------- */
.main-wrap{min-height:70vh;padding-bottom:calc(var(--tabbar-height) + 48px)}
.breadcrumb-bar{border-bottom:1px solid var(--border);background:var(--surface)}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--text-muted);padding:14px 0;
}
.breadcrumb a{color:var(--text-body);display:inline-flex;align-items:center;gap:6px;transition:color .16s}
.breadcrumb a:hover{color:var(--primary-500)}
.breadcrumb-sep{color:#C2D2DE;pointer-events:none}
.breadcrumb-current{color:var(--text-muted);max-width:360px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.article-layout{padding:44px 0 16px}
.article-grid{
  display:grid;grid-template-columns:minmax(0,880px) 300px;
  gap:48px;align-items:start;
}
.article-main-col{min-width:0}

/* Article Hero Card */
.article-hero-card{
  border-radius:var(--radius-lg);overflow:hidden;
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--shadow-xs);
  margin-bottom:28px;
}
.article-cover{
  height:260px;position:relative;overflow:hidden;
  background:linear-gradient(120deg,#D6E9F2,#EDF6FA 70%);
}
.article-cover .cover-bg-img{
  position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;opacity:.36;
  transform:scale(1.02);transition:transform .6s ease;
}
.article-hero-card:hover .cover-bg-img{transform:scale(1.05)}
.article-cover::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(22,73,105,.02),rgba(22,73,105,.04));
}
.cover-meta{position:absolute;z-index:2;top:0;left:0;right:0;display:flex;justify-content:space-between;padding:26px 28px}
.tag-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.92);backdrop-filter:blur(6px);
  border:1px solid rgba(23,50,77,.06);border-radius:999px;
  color:var(--primary-600);font-size:13px;font-weight:600;padding:7px 14px;
  box-shadow:var(--shadow-xs);
}
.tag-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--secondary)}
.cover-corner{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.75);backdrop-filter:blur(4px);
  border:1px solid rgba(23,50,77,.05);border-radius:999px;
  color:var(--text-muted);font-size:12px;padding:7px 12px;
}
.article-header-content{padding:32px 36px 20px}
.article-header-content h1{
  font-size:clamp(26px,3.2vw,36px);line-height:1.38;
  color:var(--text-strong);font-weight:800;letter-spacing:.01em;
  margin-bottom:18px;
}
.article-meta-list{
  display:flex;flex-wrap:wrap;gap:12px 26px;
  font-size:13px;color:var(--text-muted);
  border-top:1px dashed var(--border);padding-top:16px;
}
.article-meta-list span{display:inline-flex;align-items:center;gap:7px}
.meta-icon{width:16px;height:16px;stroke:currentColor}

/* Article Prose */
.article-prose-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-xs);
  padding:36px 40px 48px;
  margin-bottom:28px;
}
.article-prose{
  font-size:17px;line-height:1.85;color:var(--text-body);
  word-break:break-word;
}
.article-prose p{margin:0 0 1.1em}
.article-prose a{
  color:var(--primary-500);text-decoration:underline;text-decoration-color:rgba(44,122,165,.3);
  text-underline-offset:3px;transition:color .16s;
}
.article-prose a:hover{color:var(--primary-700);text-decoration-color:var(--primary-500)}
.article-prose h2,.article-prose h3,.article-prose h4{color:var(--text-strong);line-height:1.5;margin:1.9em 0 .7em;font-weight:700}
.article-prose h2{
  font-size:24px;padding-left:14px;margin-top:2.2em;
  border-left:4px solid var(--primary-500);border-radius:2px;
}
.article-prose h3{font-size:20px;margin-top:1.7em}
.article-prose h4{font-size:17px;color:var(--primary-700)}
.article-prose img{
  margin:26px 0;border-radius:var(--radius-md);
  box-shadow:var(--shadow-xs);object-fit:cover;
}
.article-prose ul,.article-prose ol{margin:0 0 1.2em;padding-left:1.4em;list-style-position:outside}
.article-prose ul li,.article-prose ol li{margin-bottom:.5em;padding-left:4px}
.article-prose li::marker{color:var(--primary-500)}
.article-prose blockquote{
  border-left:4px solid var(--secondary);background:var(--primary-50);
  border-radius:0 12px 12px 0;padding:18px 22px;margin:1.8em 0;
  color:var(--text-strong);font-size:15px;
}
.article-prose blockquote p:last-child{margin-bottom:0}
.article-prose table{
  width:100%;border-collapse:collapse;margin:1.8em 0;font-size:15px;
  background:var(--surface);
}
.article-prose th{
  background:var(--primary-50);color:var(--text-strong);font-weight:700;
  text-align:left;padding:12px 14px;border:1px solid var(--border);
}
.article-prose td{padding:11px 14px;border:1px solid var(--border)}
.article-prose tr:nth-child(even) td{background:#FAFDFF}
.article-prose hr{border:0;border-top:1px dashed var(--border);margin:2em 0}
.article-prose code{
  background:var(--primary-50);color:var(--primary-700);
  border-radius:6px;padding:2px 7px;font-size:.9em;font-family:ui-monospace,Consolas,monospace;
}
.article-prose figure{margin:1.8em 0}
.article-prose figcaption{font-size:13px;color:var(--text-muted);margin-top:.6em;text-align:center}

/* Shared aside */
.article-aside{min-width:0;position:sticky;top:calc(var(--nav-height) + 24px);display:flex;flex-direction:column;gap:22px}
.aside-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-xs);overflow:hidden;
}
.aside-card-head{
  padding:16px 20px;border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;
}
.aside-card-head h2{font-size:16px;color:var(--text-strong);font-weight:700;display:flex;align-items:center;gap:9px}
.aside-card-head h2::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--primary-500)}
.aside-link-more{font-size:12px;color:var(--text-muted);transition:color .16s}
.aside-link-more:hover{color:var(--primary-500)}
.aside-body{padding:8px 10px}
.aside-nav-list{list-style:none}
.aside-nav-list li{list-style:none}
.aside-nav-list a{
  display:flex;align-items:center;gap:10px;padding:11px 10px;border-radius:10px;
  font-size:14px;color:var(--text-body);transition:all .16s ease;
}
.aside-nav-list a:hover{background:var(--primary-50);color:var(--primary-700);padding-left:14px}
.aside-dot{width:6px;height:6px;border-radius:50%;background:var(--primary-100)}
.aside-nav-list a:hover .aside-dot{background:var(--primary-500)}
.aside-side-note{padding:16px 20px}
.aside-side-note h3{font-size:15px;color:var(--text-strong);margin-bottom:8px;font-weight:700}
.aside-side-note p{font-size:13px;color:var(--text-muted);line-height:1.7}
.aside-side-cta{
  background:var(--primary-700);color:#fff;padding:24px;border-radius:16px;
  position:relative;overflow:hidden;
}
.aside-side-cta::before{
  content:"";position:absolute;right:-30px;top:-30px;width:90px;height:90px;
  background:rgba(255,255,255,.12);border-radius:50%;
}
.aside-side-cta h2{color:#fff;font-size:17px;padding:0;margin-bottom:8px}
.aside-side-cta h2::before{display:none}
.aside-side-cta p{font-size:13px;color:rgba(255,255,255,.82);line-height:1.7;margin-bottom:16px}
.aside-side-cta .btn-light{color:var(--primary-700)}

/* Article Bottom */
.article-bottom-nav{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:20px 24px;
  box-shadow:var(--shadow-xs);
  margin-bottom:26px;
}
.article-bottom-nav p{font-size:14px;color:var(--text-muted)}
.bottom-pager{display:flex;gap:12px}

.content-empty-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-xs);padding:90px 24px;text-align:center;
}
.empty-icon{
  width:88px;height:88px;margin:0 auto 24px;border-radius:24px;
  background:var(--primary-50);display:flex;align-items:center;justify-content:center;
}
.empty-icon svg{width:44px;height:44px;stroke:var(--primary-500);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.content-empty-card h1{font-size:24px;color:var(--text-strong);margin-bottom:12px}
.content-empty-card p{color:var(--text-muted);font-size:15px;margin-bottom:28px}
.empty-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}

/* Contact CTA */
.contact-cta-block{
  margin-top:52px;border-radius:20px;position:relative;overflow:hidden;
  background:linear-gradient(120deg,var(--footer-bg),#163B58 60%,#1A4E6E);
  padding:48px 52px;color:#fff;
}
.contact-cta-block::after{
  content:"";position:absolute;right:-60px;top:-80px;width:240px;height:240px;
  border-radius:50%;background:rgba(63,163,154,.22);
}
.contact-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:30px;align-items:center}
.contact-copy h2{color:#fff;font-size:clamp(22px,2.6vw,30px);letter-spacing:.01em;margin-bottom:14px}
.contact-copy p{color:rgba(255,255,255,.8);font-size:15px;line-height:1.8;max-width:560px}
.contact-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2;justify-content:flex-end}

/* ---------- Footer ---------- */
.site-footer{background:var(--footer-bg);color:rgba(255,255,255,.68);margin-top:70px}
.footer-main{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:48px;padding:64px 0 40px;
}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:rgba(255,255,255,.12);color:#fff}
.footer-about{
  margin:18px 0 12px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:340px;
}
.footer-contact-item{
  display:flex;align-items:center;gap:8px;font-size:14px;margin-top:12px;
  color:rgba(255,255,255,.7);
}
.footer-col h3{
  font-size:15px;color:#fff;font-weight:600;margin-bottom:18px;letter-spacing:.02em;
}
.footer-links{list-style:none}
.footer-links li{list-style:none;margin-bottom:11px}
.footer-links a{
  color:rgba(255,255,255,.6);font-size:14px;
  transition:color .16s ease,padding-left .16s ease;position:relative;
}
.footer-links a:hover{color:#fff;padding-left:6px}
.footer-links a::before{
  content:"";position:absolute;left:0;top:50%;width:0;height:1px;
  background:var(--secondary);transition:width .16s ease;
}
.footer-links a:hover::before{width:2px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.4);
}

/* ---------- No-content not found ---------- */
.not-found-wrap{padding:72px 0}

/* ---------- Responsive ---------- */
@media (max-width:1180px){
  .article-grid{grid-template-columns:minmax(0,780px) 1fr;gap:30px}
  .article-aside{position:static}
  .footer-main{grid-template-columns:1fr 1fr 1fr;gap:38px}
}
@media (max-width:960px){
  .header-inner{gap:16px}
  .container{--container-pad:20px}
  .article-grid{grid-template-columns:1fr}
  .article-aside{display:none}
  .contact-cta-block{padding:40px 28px}
  .contact-grid{grid-template-columns:1fr;gap:22px}
  .contact-actions{justify-content:flex-start}
  .footer-main{grid-template-columns:1fr 1fr;gap:34px;padding-bottom:30px}
  .header-contact .btn{padding:0 14px}
}
@media (max-width:860px){
  .site-header{position:sticky}
  .main-nav{display:none}
  .mobile-tabbar{display:block}
  .header-actions{display:none}
  body{padding-bottom:0}
  .main-wrap{padding-bottom:calc(var(--tabbar-height) + env(safe-area-inset-bottom) + 28px)}
  .article-layout{padding-top:0}
  .article-cover{height:215px}
  .article-header-content{padding:26px 24px 18px}
  .article-header-content h1{font-size:25px;margin-bottom:14px}
  .article-prose-card{padding:26px 22px 38px}
  .article-prose{font-size:16px}
  .article-prose h2{font-size:21px}
  .article-prose h3{font-size:18px}
  .cover-meta{padding:18px}
  .article-bottom-nav{flex-direction:column;align-items:flex-start}
  .bottom-pager{width:100%}
  .bottom-pager .btn{flex:1}
  .content-empty-card{padding:70px 20px}
}
@media (max-width:760px){
  .footer-main{grid-template-columns:1fr;gap:24px;padding-top:44px}
  .footer-col h3{margin-bottom:12px}
  .site-footer{margin-top:50px}
  .contact-cta-block{border-radius:14px;padding:34px 22px}
  .container{--container-pad:16px}
  .article-header-content h1{font-size:22px}
  .article-prose{font-size:16px;line-height:1.8}
  .breadcrumb-current{max-width:200px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

/* roulang page: category2 */
:root {
    --color-primary-700: #1A5A80;
    --color-primary-600: #21688F;
    --color-primary-500: #2C7AA5;
    --color-primary-100: #DCEDF5;
    --color-primary-50: #EDF6FA;
    --color-secondary: #3FA39A;
    --color-accent: #E9A13B;
    --color-surface: #FFFFFF;
    --color-canvas: #F6FAFC;
    --color-text-strong: #17324D;
    --color-text-body: #3B5266;
    --color-text-muted: #7A8FA0;
    --color-border: #E3ECF3;
    --color-footer: #102A40;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --shadow-xs: 0 1px 2px rgba(23,50,77,0.06);
    --shadow-sm: 0 4px 16px -8px rgba(23,50,77,0.12);
    --shadow-md: 0 16px 36px -16px rgba(23,50,77,0.18);
    --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Noto Sans CJK SC", sans-serif;
    --container-width: 1280px;
    --container-padding: 24px;
    --transition: 180ms ease;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-family);
    background: var(--color-surface);
    color: var(--color-text-body);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: var(--color-primary-500);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--color-primary-700);
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid var(--color-border);
    height: 72px;
}
.header-inner {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    font-weight: 600;
    color: var(--color-text-strong);
}
.brand-mark {
    width: 36px;
    height: 36px;
    background: var(--color-primary-600);
    color: white;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}
.brand-text {
    font-size: 18px;
    line-height: 1.3;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.brand-divider {
    color: var(--color-border);
    font-weight: 300;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav-link {
    font-size: 15px;
    color: var(--color-text-body);
    padding: 26px 2px 20px;
    border-bottom: 2px solid transparent;
    transition: all 180ms ease;
    line-height: 1;
}
.nav-link:hover {
    color: var(--color-primary-600);
}
.nav-link.active {
    color: var(--color-primary-600);
    border-bottom-color: var(--color-primary-500);
    font-weight: 600;
}
.header-action {
    display: flex;
    align-items: center;
    gap: 12px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    border-radius: 8px;
    padding: 0 20px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    font-family: var(--font-family);
    transition: all 180ms ease;
    text-align: center;
    gap: 6px;
    font-weight: 500;
}
.btn:hover {
    transform: translateY(-2px);
}
.btn:active {
    transform: translateY(-1px);
}
.btn:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}
.btn-primary {
    background: var(--color-primary-600);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-primary-700);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--color-primary-600);
    border: 1px solid var(--color-primary-500);
}
.btn-outline:hover {
    background: rgba(44, 122, 165, 0.06);
    color: var(--color-primary-700);
    border-color: var(--color-primary-700);
}
.btn-light {
    background: #fff;
    color: var(--color-primary-700);
}
.btn-light:hover {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
}
.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 180ms ease;
}
.link-arrow:hover {
    gap: 10px;
}
.main-nav-mobile, .mobile-bottom-tab, .header-action-mobile {
    display: none;
}

/* hero */
.cat-hero {
    background: linear-gradient(135deg, #f0f7fb 0%, #e7f1f7 50%, #d8eaf2 100%);
    padding: 88px 0 88px;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}
.cat-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20" fill="none"><circle cx="1" cy="1" r="1" fill="%232C7AA5" opacity="0.08"/></svg>');
    background-size: 28px 28px;
    opacity: 0.7;
}
.cat-hero-content {
    position: relative;
    max-width: 820px;
    z-index: 2;
}
.cat-hero .page-eyebrow {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 100px;
    padding: 6px 16px;
    font-size: 13px;
    color: var(--color-primary-600);
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(44, 122, 165, 0.25);
    gap: 8px;
}
.cat-hero .page-eyebrow::before {
    width: 8px;
    height: 8px;
    background: var(--color-primary-500);
    border-radius: 50%;
    content: '';
}
.cat-hero h1 {
    font-size: clamp(32px, 4vw, 48px);
    color: var(--color-text-strong);
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: 0.01em;
}
.cat-hero p.lead {
    font-size: 17px;
    line-height: 1.8;
    color: var(--color-text-body);
    margin-top: 18px;
    max-width: 680px;
}
.hero-actions {
    margin-top: 32px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.hero-note {
    margin-top: 20px;
    font-size: 14px;
    color: var(--color-text-muted);
    display: flex;
    align-items: flex-start;
    gap: 6px;
}
.hero-note .icon {
    color: var(--color-primary-500);
}
.section {
    padding: 72px 0;
}
.section-light {
    background-color: var(--color-canvas);
}
.section-title-block {
    margin-bottom: 44px;
    max-width: 800px;
}
.section-title-block h2 {
    font-size: 30px;
    line-height: 1.35;
    color: var(--color-text-strong);
    letter-spacing: 0.01;
}
.section-title-block h2 .highlight {
    color: var(--color-primary-600);
}
.section-title-block p {
    margin-top: 14px;
    font-size: 16px;
    color: var(--color-text-body);
    line-height: 1.7;
}
.eyebrow-chip {
    display: inline-block;
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    font-size: 14px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 6px;
    margin-bottom: 12px;
}

/* process */
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    list-style: none;
}
.process-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    position: relative;
}
.step-num {
    width: 36px;
    height: 36px;
    background: var(--color-primary-600);
    color: white;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-bottom: 14px;
}
.process-card h3 {
    font-size: 19px;
    color: var(--color-text-strong);
    margin-bottom: 8px;
}
.process-card p {
    font-size: 15px;
    color: var(--color-text-body);
    line-height: 1.7;
}
.process-line {
    border-top: 2px dashed var(--color-primary-500);
    position: absolute;
    top: 46px;
    left: -12px;
    width: 24px;
}
@media (max-width: 900px) {
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .process-line {
        display: none;
    }
}

/* category chips */
.cat-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}
.chip {
    display: inline-block;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 100px;
    padding: 8px 16px;
    font-size: 14px;
    color: var(--color-text-body);
    transition: all 180ms ease;
}
.chip:hover {
    border-color: var(--color-primary-500);
    color: var(--color-primary-600);
    background: var(--color-primary-50);
}

/* doc list rows */
.doc-card-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.doc-row {
    background: #fff;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    padding: 28px 28px;
    box-shadow: var(--shadow-xs);
    display: grid;
    grid-template-columns: 1fr 1.6fr 0.6fr 0.7fr;
    gap: 24px;
    align-items: center;
    transition: all 200ms ease;
}
.doc-row:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.doc-tag {
    display: inline-block;
    background: var(--color-primary-100);
    color: var(--color-primary-700);
    font-size: 13px;
    font-weight: 600;
    border-radius: 6px;
    padding: 4px 10px;
    width: fit-content;
}
.doc-title {
    color: var(--color-text-strong);
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 6px;
}
.doc-desc {
    font-size: 15px;
    color: var(--color-text-body);
    margin-top: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.doc-cta {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary-500);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 180ms ease;
}
.doc-cta:hover {
    gap: 10px;
    color: var(--color-primary-700);
}
.doc-time {
    font-size: 13px;
    color: var(--color-text-muted);
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
}
.doc-time span.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-secondary);
}
@media (max-width: 768px) {
    .doc-row {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 20px;
    }
    .doc-time {
        justify-content: flex-start;
    }
}

/* split info block */
.split-info {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
    align-items: center;
}
.media-cover {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    position: relative;
    line-height: 0;
}
.media-cover img {
    width: 100%;
    height: auto;
    object-fit: cover;
}
.media-cover .cover-badge {
    position: absolute;
    right: 18px;
    bottom: 18px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    border-radius: 8px;
    font-size: 13px;
    color: var(--color-primary-700);
    font-weight: 600;
    padding: 6px 12px;
    line-height: 1.4;
}
.text-mb-12 {
    margin-bottom: 12px;
}
.link-list {
    margin: 20px 0;
}
.link-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}
.link-list li::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--color-secondary);
    border-radius: 50%;
    flex-shrink: 0;
}
.info-point-item {
    display: flex;
    gap: 12px;
    margin-bottom: 14px;
}
.info-point-icon {
    color: var(--color-primary-500);
    font-size: 18px;
    line-height: 1.4;
}
.info-point-content {
    font-size: 15px;
}
@media (max-width: 768px) {
    .split-info {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* partner band */
.partner-band {
    background: var(--color-footer);
    padding: 56px 0;
    color: #fff;
}
.partner-band .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}
.partner-stats {
    display: flex;
    align-items: center;
    gap: 48px;
}
.partner-stat-item {
    text-align: center;
}
.partner-stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}
.partner-stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 4px;
}

/* list quick */
.need-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 40px;
    list-style: none;
    margin-top: 20px;
}
.need-list li {
    position: relative;
    background: #fff;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    padding: 24px;
    box-shadow: var(--shadow-xs);
}
.need-list li strong {
    font-size: 16px;
    color: var(--color-text-strong);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 6px;
}
.need-list li p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}
@media (max-width: 600px) {
    .need-list {
        grid-template-columns: 1fr;
    }
}

/* FAQ */
.faq-section {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    background: #fff;
    overflow: hidden;
    transition: all 180ms;
}
.faq-item-card:hover {
    border-color: var(--color-primary-500);
}
.faq-toggle {
    padding: 18px 24px;
    border: none;
    background: transparent;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    font-size: 16px;
    color: var(--color-text-strong);
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: 500;
    text-align: left;
    gap: 16px;
}
.faq-toggle:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: -2px;
    border-radius: var(--radius-md);
}
.faq-toggle .qa-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-primary-100);
    color: var(--color-primary-600);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: transform 180ms ease;
    font-weight: 400;
}
.faq-item-card.active .faq-toggle .qa-icon {
    transform: rotate(45deg);
}
.faq-item-card .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 220ms ease;
}
.faq-item-card.active .faq-answer {
    max-height: 300px;
}
.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-body);
    border-top: 1px solid var(--color-border);
    padding-top: 16px;
}

/* CTA */
.contact-cta {
    background: var(--color-footer);
    border-radius: var(--radius-lg);
    padding: 60px;
    color: #fff;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    position: relative;
    overflow: hidden;
}
.contact-cta::after {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 200px;
    height: 200px;
    background: rgba(44, 122, 165, 0.3);
    border-radius: 50%;
}
.contact-left h2,
.contact-left p {
    color: white;
}
.contact-left h2 {
    font-size: 28px;
    margin-bottom: 12px;
}
.contact-info {
    list-style: none;
    margin: 20px 0 0;
}
.contact-info li {
    display: flex;
    gap: 12px;
    margin-bottom: 10px;
    font-size: 15px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.85);
}
.contact-form {
    display: grid;
    gap: 14px;
}
.contact-form input, .contact-form select, .contact-form textarea {
    background: #ffffff;
    border-radius: 8px;
    height: 46px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 0px 14px;
    font-family: var(--font-family);
    font-size: 15px;
    transition: all 180ms ease;
    width: 100%;
    color: var(--color-text-strong);
    box-sizing: border-box;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(44, 122, 165, 0.18);
}
@media (max-width: 900px) {
    .contact-cta {
        grid-template-columns: 1fr;
    }
}

/* footer */
.site-footer {
    background: var(--color-footer);
    color: rgba(255,255,255,0.75);
    padding-top: 64px;
    padding-bottom: 24px;
}
.footer-main {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 44px;
    padding-bottom: 40px;
    margin-bottom: 24px;
}
.footer-brand .brand {
    color: #fff;
    font-size: 20px;
}
.footer-about {
    margin-top: 18px;
    font-size: 14px;
    line-height: 1.75;
    color: rgba(255,255,255,0.65);
    max-width: 240px;
}
.footer-col h3 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.65);
    transition: color 180ms;
    background: none;
    padding: 2px 0;
    display: inline-block;
}
.footer-links a:hover {
    color: #fff;
}
.footer-contact-item {
    margin-top: 16px;
    font-size: 13px;
    color: rgba(255,255,255,0.55);
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    color: rgba(255,255,255,0.45);
    font-size: 13px;
}
@media (max-width: 900px) {
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 560px) {
    .footer-main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    .header-action {
        display: none;
    }
    .header-action-mobile {
        display: inline-flex;
    }
    .mobile-bottom-tab {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 64px;
        padding-bottom: env(safe-area-inset-bottom);
        background: #fff;
        border-top: 1px solid var(--color-border);
        box-shadow: 0 -6px 20px rgba(23,50,77,0.08);
        z-index: 80;
        justify-content: space-around;
        align-items: center;
    }
    .mobile-tab-link {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        color: var(--color-text-muted);
        gap: 4px;
        width: 20%;
        height: 100%;
        gap: 4px;
    }
    .mobile-tab-link i {
        font-size: 20px;
    }
    .mobile-tab-link.active {
        color: var(--color-primary-600);
        font-weight: 600;
    }
    body {
        padding-bottom: calc(64px + env(safe-area-inset-bottom));
    }
    header.site-header {
        height: 60px;
    }
    .header-inner {
        height: 60px;
        padding: 0 16px;
    }
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
}

/* roulang page: category1 */
:root{
  --color-primary-700:#1A5A80;
  --color-primary-600:#21688F;
  --color-primary-500:#2C7AA5;
  --color-primary-100:#DCEDF5;
  --color-primary-50:#EDF6FA;
  --color-secondary:#3FA39A;
  --color-accent:#E9A13B;
  --color-surface:#FFFFFF;
  --color-canvas:#F6FAFC;
  --color-text-strong:#17324D;
  --color-text-body:#3B5266;
  --color-text-muted:#7A8FA0;
  --color-border:#E3ECF3;
  --color-footer:#102A40;
  --radius-sm:8px;
  --radius-md:10px;
  --radius-card:16px;
  --radius-large:20px;
  --shadow-xs:0 1px 2px rgba(23,50,77,.06);
  --shadow-sm:0 4px 16px -8px rgba(23,50,77,.12);
  --shadow-md:0 16px 36px -16px rgba(23,50,77,.18);
  --transition:all .18s ease;
  --container:1280px;
  --header-h:72px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Source Han Sans CN","Noto Sans CJK SC",sans-serif;
  color:var(--color-text-body);
  background:var(--color-surface);
  line-height:1.75;
  font-size:16px;
}
body.article-page main,body.category-page main{padding-bottom:calc(64px + env(safe-area-inset-bottom))}
@media(min-width:1025px){
  body.article-page main,body.category-page main{padding-bottom:0}
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:1rem}
.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px}
.section{padding:88px 0}
.section-soft{background:var(--color-canvas);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}

/*按钮*/
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--radius-sm);
  border:1px solid transparent;font-size:16px;font-weight:600;line-height:1;
  cursor:pointer;transition:var(--transition);text-align:center;
}
.btn i{font-size:14px;transition:transform .18s ease}
.btn:hover i{margin-left:auto}
.btn-primary{background:var(--color-primary-600);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--color-primary-700);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(-1px)}
.btn-primary:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:3px}
.btn-light{background:#fff;color:var(--color-text-strong);border-color:#DCE5EC;box-shadow:var(--shadow-xs)}
.btn-light:hover{border-color:var(--color-primary-500);color:var(--color-primary-600);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-light:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:3px}

/*页头*/
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--color-border);
  height:var(--header-h);
}
.header-inner{height:var(--header-h);display:flex;align-items:center;gap:32px;justify-content:space-between}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:42px;height:42px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--color-primary-600);color:#fff;font-weight:800;font-size:22px;
  box-shadow:var(--shadow-sm);
}
.brand-text{color:var(--color-text-strong);font-size:21px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-text .brand-divider{margin:0 6px;font-weight:400;color:var(--color-border)}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-link{
  display:inline-flex;align-items:center;min-height:46px;padding:0 15px;
  font-size:15.5px;font-weight:500;color:var(--color-text-body);
  border-radius:var(--radius-sm);position:relative;transition:var(--transition);
}
.nav-link:hover{color:var(--color-primary-600);background:var(--color-primary-50)}
.nav-link.active{color:var(--color-primary-600);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:15px;right:15px;bottom:0;height:2px;
  background:var(--color-primary-600);border-radius:2px;
}
.nav-link:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:2px}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.header-contact-btn{min-height:40px;padding:0 18px;font-size:14.5px}
.mobile-entry-btn{
  display:none;align-items:center;justify-content:center;gap:6px;
  min-height:40px;padding:0 14px;border:1px solid var(--color-border);
  border-radius:999px;color:var(--color-primary-600);background:#fff;font-size:14px;font-weight:600;
}
.mobile-entry-btn:hover{background:var(--color-primary-50)}

/*移动底部Tab*/
.mobile-tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:100;
  background:rgba(255,255,255,.96);backdrop-filter:blur(10px);
  border-top:1px solid var(--color-border);
  box-shadow:0 -6px 20px rgba(23,50,77,.06);
  height:calc(60px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:flex;align-items:stretch;height:60px}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:4px;color:var(--color-text-muted);font-size:12px;font-weight:500;min-height:48px;
  transition:var(--transition);
}
.tab-item i{font-size:20px;line-height:1}
.tab-item.active{color:var(--color-primary-600)}
.tab-item.active i{font-weight:900}
.tab-item:hover,.tab-item:focus-visible{background:var(--color-primary-50);outline:none}
.tab-item:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:-2px;border-radius:12px}

/*Hero*/
.page-hero{
  position:relative;padding:88px 0 76px;overflow:hidden;
  background-color:var(--color-primary-50);
  background-image:linear-gradient(180deg,rgba(246,250,252,.94) 0%,rgba(232,244,249,.82) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--color-border);
}
.crumbs{display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--color-text-muted);margin-bottom:26px;flex-wrap:wrap}
.crumbs a{transition:var(--transition)}
.crumbs a:hover{color:var(--color-primary-600)}
.crumbs i{font-size:12px;align-self:center;color:#AFC3D1;margin:0 2px}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--color-primary-100);color:var(--color-primary-600);font-size:14px;font-weight:600;
  margin-bottom:22px;letter-spacing:.02em;
}
.hero-kicker i{font-size:13px}
.hero-title{
  font-size:clamp(34px,5vw,54px);line-height:1.18;letter-spacing:.01em;
  color:var(--color-text-strong);margin-bottom:20px;font-weight:800;
}
.hero-lead{max-width:760px;font-size:clamp(16px,1.6vw,19px);line-height:1.75;color:var(--color-text-body);margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-note{margin-top:24px;display:flex;flex-wrap:wrap;gap:14px;color:var(--color-text-muted);font-size:14px}
.hero-note span{display:inline-flex;align-items:center;gap:6px}
.hero-note i{color:var(--color-secondary);font-size:13px}

/*板块通用标题*/
.section-head{margin-bottom:48px;max-width:860px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;
  color:var(--color-primary-600);margin-bottom:12px;letter-spacing:.04em;
}
.kicker::before{content:"";width:20px;height:2px;background:var(--color-primary-500);border-radius:2px;display:inline-block}
.center .kicker::before,.kicker.center::before{margin-left:.2em}
.sec-title{font-size:clamp(26px,3vw,36px);line-height:1.28;color:var(--color-text-strong);font-weight:800;margin-bottom:16px;letter-spacing:-.01em}
.section-lead{font-size:16.5px;color:var(--color-text-body);max-width:760px;line-height:1.8}
.center .section-lead,.section-lead.center{margin-left:auto;margin-right:auto}

/*服务清单 + 右栏*/
.service-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.service-list{border-top:1px solid var(--color-border)}
.service-row{
  display:grid;grid-template-columns:62px minmax(0,1fr) auto;gap:22px;
  padding:30px 4px;border-bottom:1px solid var(--color-border);
  align-items:start;transition:var(--transition);border-radius:8px;
}
.service-row:hover{background:var(--color-canvas);padding-left:12px;padding-right:12px}
.service-row:hover .row-index{background:var(--color-primary-600);color:#fff}
.row-index{
  width:48px;height:48px;border-radius:14px;background:var(--color-primary-50);
  color:var(--color-primary-600);display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;margin-top:4px;transition:var(--transition);letter-spacing:.02em;
}
.row-tag{
  display:inline-flex;align-items:center;gap:6px;margin-bottom:7px;
  padding:3px 10px;border-radius:6px;background:var(--color-primary-100);
  color:var(--color-primary-600);font-size:13px;font-weight:600;letter-spacing:.02em;
}
.service-row h3{font-size:20px;font-weight:700;color:var(--color-text-strong);line-height:1.45;margin-bottom:8px}
.row-copy{font-size:15.5px;line-height:1.8;color:var(--color-text-body);max-width:680px}
.row-cta{
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;font-size:14px;
  font-weight:600;color:var(--color-primary-600);margin-top:26px;transition:var(--transition);
}
.row-cta i{transition:transform .18s ease}
.row-cta:hover i{transform:translateX(4px)}
.row-cta:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:3px;border-radius:6px}
/*右栏信息卡*/
.service-aside{display:flex;flex-direction:column;gap:20px;position:sticky;top:calc(var(--header-h) + 24px)}
.aside-card{
  background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-card);padding:22px 22px;box-shadow:var(--shadow-xs);transition:var(--transition);
}
.aside-card:hover{box-shadow:var(--shadow-md)}
.aside-title{display:flex;align-items:center;gap:10px;color:var(--color-text-strong);font-size:17px;font-weight:700;margin-bottom:14px}
.aside-icon{width:36px;height:36px;border-radius:10px;background:var(--color-primary-50);color:var(--color-primary-600);display:inline-flex;align-items:center;justify-content:center;font-size:16px}
.status-item{display:flex;justify-content:space-between;gap:10px;padding:7px 0;font-size:14.5px;border-bottom:1px dashed var(--color-border)}
.status-item:last-child{border-bottom:0}
.status-item.ok{color:var(--color-text-body)}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--color-secondary);display:inline-block}
.role-audience{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.role-audience span{background:var(--color-primary-50);color:var(--color-primary-600);padding:4px 10px;border-radius:999px;font-size:13px;font-weight:500}
.material-list li{display:flex;align-items:flex-start;gap:8px;padding:6px 0;font-size:14.5px;color:var(--color-text-body)}
.material-list i{color:var(--color-secondary);font-size:12px;margin-top:6px}
.aside-cta{
  display:flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;border-radius:10px;background:var(--color-primary-600);color:#fff;
  font-size:15px;font-weight:600;transition:var(--transition);margin-top:8px;
}
.aside-cta:hover{background:var(--color-primary-700);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.aside-cta:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:3px}

/*角色板块 2列*/
.role-board{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.role-item{
  background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-card);
  padding:24px 24px;display:grid;grid-template-columns:50px 1fr;gap:16px;align-items:start;
  box-shadow:var(--shadow-xs);transition:var(--transition);
}
.role-item:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.role-icon{
  width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:var(--color-primary-50);color:var(--color-primary-600);font-size:21px;
}
.role-item h3{font-size:18px;font-weight:700;color:var(--color-text-strong);margin-bottom:8px}
.role-item p{font-size:15px;line-height:1.75;color:var(--color-text-body)}
.role-item ul{margin-top:8px}
.role-item ul li{display:flex;align-items:flex-start;gap:6px;font-size:14px;color:var(--color-text-body);padding:4px 0}
.role-item ul li i{color:var(--color-secondary);font-size:11px;margin-top:7px}

/*流程时间线*/
.flow-steps{position:relative;max-width:860px;margin:0 auto}
.flow-steps::before{content:"";position:absolute;left:30px;top:10px;bottom:10px;width:2px;background:var(--color-primary-100)}
.flow-step{
  position:relative;display:grid;grid-template-columns:60px minmax(0,1fr);gap:26px;
  padding-bottom:38px;
}
.flow-step:last-child{padding-bottom:0}
.flow-count{
  width:60px;height:60px;border-radius:50%;background:#fff;border:2px solid var(--color-primary-100);
  display:flex;align-items:center;justify-content:center;color:var(--color-primary-600);
  font-weight:800;font-size:15px;z-index:1;box-shadow:var(--shadow-xs);transition:var(--transition);
}
.flow-step:hover .flow-count{background:var(--color-primary-600);color:#fff;border-color:var(--color-primary-600)}
.flow-content{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-card);padding:20px 24px;box-shadow:var(--shadow-xs);transition:var(--transition)}
.flow-content:hover{box-shadow:var(--shadow-md)}
.flow-content h3{font-size:18px;font-weight:700;color:var(--color-text-strong);margin-bottom:6px}
.flow-content p{font-size:15px;color:var(--color-text-body);line-height:1.75}

/*服务场景横向图文*/
.scenario-item{
  display:grid;grid-template-columns:1.02fr .98fr;gap:26px;align-items:stretch;
  background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-large);
  overflow:hidden;box-shadow:var(--shadow-xs);transition:var(--transition);margin-bottom:28px;
}
.scenario-item:hover{box-shadow:var(--shadow-md)}
.scenario-item.reverse .scenario-media{order:2}
.scenario-media{overflow:hidden;min-height:100%}
.scenario-media img{width:100%;height:100%;min-height:300px;object-fit:cover;transition:transform .38s ease}
.scenario-media img:hover{transform:scale(1.03)}
.scenario-body{padding:34px 38px;display:flex;flex-direction:column;justify-content:center}
.scene-kicker{font-size:13px;font-weight:600;color:var(--color-secondary);letter-spacing:.05em;margin-bottom:10px}
.scenario-body h3{font-size:23px;font-weight:800;color:var(--color-text-strong);line-height:1.4;margin-bottom:14px}
.scenario-body p{font-size:15.5px;line-height:1.8;color:var(--color-text-body);margin-bottom:18px}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto}
.scene-tags span{
  background:var(--color-primary-50);border:1px solid var(--color-primary-100);
  color:var(--color-primary-600);font-size:13px;padding:3px 10px;border-radius:999px;
}

/*保障响应band*/
.assure-band{
  position:relative;overflow:hidden;border-radius:var(--radius-large);
  padding:72px 48px;color:#fff;
  background-color:var(--color-footer);
  background-image:linear-gradient(100deg,rgba(16,42,64,.94) 0%,rgba(33,104,143,.86) 100%),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.assure-band::after{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:rgba(63,163,154,.18);pointer-events:none}
.assure-band h2{font-size:clamp(25px,3vw,34px);color:#fff;line-height:1.35;margin-bottom:12px;position:relative;z-index:1}
.assure-band .band-intro{font-size:15.5px;color:rgba(255,255,255,.76);max-width:680px;margin-bottom:36px;position:relative;z-index:1}
.band-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;position:relative;z-index:1}
.band-item{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:16px;padding:22px 20px;transition:var(--transition)}
.band-item:hover{background:rgba(255,255,255,.16);transform:translateY(-3px)}
.band-num{display:block;font-size:28px;font-weight:800;color:#fff;margin-bottom:8px;line-height:1}
.band-item h3{font-size:16px;color:#fff;font-weight:700;margin-bottom:8px}
.band-item p{font-size:14px;color:rgba(255,255,255,.76);line-height:1.7}

/*FAQ*/
.faq-wrap{max-width:840px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  background:var(--color-surface);border:1px solid var(--color-border);
  border-radius:var(--radius-card);overflow:hidden;transition:var(--transition);
}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;font-weight:600;font-size:16.5px;color:var(--color-text-strong);
  transition:var(--transition);outline:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{background:var(--color-primary-50);color:var(--color-primary-700)}
.faq-item summary:focus-visible{outline:2px solid var(--color-primary-500);outline-offset:-2px}
.faq-icon{
  flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:var(--color-primary-50);
  color:var(--color-primary-600);display:inline-flex;align-items:center;justify-content:center;
  transition:transform .2s ease;font-size:13px;
}
.faq-item[open]{border-color:var(--color-primary-500);background:var(--color-primary-50)}
.faq-item[open] summary{background:var(--color-primary-50)}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--color-primary-600);color:#fff}
.faq-answer{padding:2px 24px 24px;font-size:15px;line-height:1.85;color:var(--color-text-body)}
.faq-answer p{margin-bottom:8px}
.faq-answer p:last-child{margin-bottom:0}

/*联系CTA*/
.conversion-panel{
  border-radius:var(--radius-large);background:linear-gradient(135deg,var(--color-primary-50) 0%,#E4F3F2 100%);
  border:1px solid var(--color-border);padding:52px 48px;
  display:grid;grid-template-columns:0.92fr 1.08fr;gap:44px;align-items:center;
}
.cv-left h2{font-size:clamp(24px,3vw,32px);color:var(--color-text-strong);line-height:1.35;margin-bottom:18px}
.cv-left p{font-size:15.5px;color:var(--color-text-body);line-height:1.85;margin-bottom:14px}
.cv-time{
  display:inline-flex;align-items:center;gap:8px;color:var(--color-primary-600);
  background:var(--color-primary-100);border-radius:10px;padding:8px 14px;font-size:14px;font-weight:600;
}
.form-card{
  background:#fff;border-radius:20px;padding:20px;box-shadow:var(--shadow-sm);
  border:1px solid var(--color-border);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field-group{display:flex;flex-direction:column;gap:7px}
.field-group.full{grid-column:span 2}
.field-group label{font-size:14px;color:var(--color-text-body);font-weight:500}
.field-control{
  height:50px;border:1px solid #D8E3EC;border-radius:10px;padding:0 14px;width:100%;
  background:#fff;color:var(--color-text-strong);transition:var(--transition);outline:none;font-size:15px;
}
textarea.field-control{height:auto;padding-top:14px;min-height:90px;resize:vertical}
.field-control::placeholder{color:#9AAEBD}
.field-control:hover{border-color:var(--color-primary-100)}
.field-control:focus{border-color:var(--color-primary-500);box-shadow:0 0 0 3px rgba(44,122,165,.18)}
.btn-submit{width:100%;margin-top:18px;min-height:50px;font-size:16px;cursor:pointer}
.form-note{color:#8CA2B2;font-size:13px;margin-top:12px;display:flex;align-items:center;gap:6px}
.form-note i{color:var(--color-secondary)}

/*页脚*/
.site-footer{background:var(--color-footer);color:rgba(255,255,255,.72);padding:70px 0 34px;font-size:14.5px}
.footer-main{display:grid;grid-template-columns:2.2fr 1fr 1fr 1.15fr;gap:36px;margin-bottom:52px}
.footer-brand a.brand{color:#fff}
.footer-brand .brand-text{color:#fff}
.footer-about{margin-top:18px;line-height:1.85;max-width:360px;color:rgba(255,255,255,.66)}
.footer-contact-item{display:flex;align-items:center;gap:8px;margin-top:16px;color:#fff;background:rgba(255,255,255,.1);border-radius:10px;padding:8px 12px;width:fit-content}
.footer-contact-item i{color:var(--color-secondary)}
.footer-col h3{font-size:16px;color:#fff;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-links li{margin-bottom:8px}
.footer-links a{display:inline-block;padding:3px 0;color:rgba(255,255,255,.65);transition:var(--transition);border-radius:4px}
.footer-links a:hover{color:#fff;transform:translateX(3px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);padding-top:26px;
  color:rgba(255,255,255,.55);font-size:13.5px;display:flex;flex-wrap:wrap;gap:10px 28px;justify-content:space-between;
}
.footer-bottom a{color:rgba(255,255,255,.8);transition:var(--transition)}
.footer-bottom a:hover{color:#fff;text-decoration:underline}
.brand-divider{color:rgba(255,255,255,.3)}

/*断点*/
@media(max-width:1100px){
  .header-inner{gap:14px}
  .nav-link{padding:0 10px}
  .service-layout{grid-template-columns:1fr 300px;gap:28px}
  .scenario-body{padding:26px 22px}
}
@media(max-width:1024px){
  :root{--header-h:62px}
  body{padding-bottom:calc(60px + env(safe-area-inset-bottom))}
  .mobile-tabbar{display:block}
  .main-nav{display:none}
  .header-contact-btn{display:none}
  .mobile-entry-btn{display:inline-flex}
  .header-inner{justify-content:space-between}
  .section{padding:68px 0}
  .aside-card{position:static}
}
@media(max-width:900px){
  .container{padding-left:18px;padding-right:18px}
  .service-layout{grid-template-columns:1fr}
  .service-aside{position:static;display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
  .role-board{grid-template-columns:1fr}
  .scenario-item,.scenario-item.reverse{grid-template-columns:1fr}
  .scenario-item.reverse .scenario-media{order:0}
  .scenario-media img{min-height:240px}
  .band-grid{grid-template-columns:1fr}
  .assure-band{padding:56px 28px}
  .conversion-panel{grid-template-columns:1fr;padding:38px 28px;gap:26px}
  .footer-main{grid-template-columns:1fr 1fr;gap:34px 28px}
}
@media(max-width:640px){
  .section{padding:52px 0}
  .page-hero{padding:54px 0 56px}
  .hero-actions .btn{width:100%}
  .hero-actions{flex-direction:column}
  .row-cta{margin-top:16px}
  .service-row{grid-template-columns:40px 1fr;gap:14px;padding:22px 0}
  .row-index{width:38px;height:38px;font-size:13px;border-radius:10px}
  .service-row:hover{padding-left:8px;padding-right:8px}
  .service-aside{grid-template-columns:1fr}
  .aside-card{position:static}
  .flow-steps::before{left:23px}
  .flow-step{grid-template-columns:46px minmax(0,1fr);gap:14px}
  .flow-count{width:46px;height:46px;font-size:13px}
  .scenario-body{padding:22px 18px}
  .assure-band{padding:44px 20px}
  .form-grid{grid-template-columns:1fr}
  .field-group.full{grid-column:span 1}
  .cv-left h2{font-size:24px}
  .footer-main{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .scenario-media img{min-height:200px}
  .faq-item summary{padding:18px 16px;font-size:15.5px;}
  .faq-answer{padding:2px 16px 20px}
}

@media(max-width:420px){
  .container{padding-left:14px;padding-right:14px}
  .brand-text{font-size:18px}
  .mobile-entry-btn{min-height:36px;padding:0 10px}
  .brand-mark{width:36px;height:36px;font-size:18px;border-radius:10px}
  .tab-item{font-size:11px}
  .tab-item i{font-size:18px}
}

/* roulang page: category3 */
:root {
    --color-primary-700: #1A5A80;
    --color-primary-600: #21688F;
    --color-primary-500: #2C7AA5;
    --color-primary-100: #DCEDF5;
    --color-primary-50: #EDF6FA;
    --color-secondary: #3FA39A;
    --color-accent: #E9A13B;
    --color-surface: #FFFFFF;
    --color-canvas: #F6FAFC;
    --color-text-strong: #17324D;
    --color-text-body: #3B5266;
    --color-text-muted: #7A8FA0;
    --color-border: #E3ECF3;
    --color-footer: #102A40;
    --font-main: "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Noto Sans CJK SC", sans-serif;
    --shadow-xs: 0 1px 2px rgba(23,50,77,0.06);
    --shadow-sm: 0 4px 16px -8px rgba(23,50,77,0.12);
    --shadow-md: 0 16px 36px -16px rgba(23,50,77,0.18);
    --radius-btn: 8px;
    --radius-input: 10px;
    --radius-card: 16px;
    --container-w: 1280px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-canvas);
    color: var(--color-text-body);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body.nav-lock {
    overflow: hidden;
}

img {
    max-width: 100%;
    display: block;
    border: 0;
}

a {
    color: var(--color-primary-500);
    text-decoration: none;
    transition: color 0.18s ease;
}

a:hover {
    color: var(--color-primary-700);
}

ul, ol {
    list-style: none;
}

button {
    font-family: var(--font-main);
    cursor: pointer;
    border: none;
    background: none;
}

.container {
    width: 100%;
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--color-border);
    height: 72px;
    display: flex;
    align-items: center;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--color-primary-600);
    color: #fff;
    font-weight: 700;
    font-size: 19px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 0;
    line-height: 1;
    box-shadow: 0 4px 10px -4px rgba(33,104,143,0.5);
}

.brand-text {
    font-size: 18px;
    color: var(--color-text-strong);
    font-weight: 700;
    letter-spacing: 0.01em;
    line-height: 1.2;
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.brand-text .brand-strong {
    font-weight: 700;
    color: var(--color-primary-700);
}

.brand-divider {
    color: #C6D8E4;
    font-weight: 300;
    font-size: 16px;
}

.brand-sub {
    font-size: 13px;
    color: var(--color-text-muted);
    font-weight: 400;
    letter-spacing: 0.04em;
    margin-left: 2px;
    background: var(--color-primary-50);
    padding: 3px 8px;
    border-radius: 6px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link {
    display: block;
    padding: 26px 14px 24px;
    color: var(--color-text-body);
    font-size: 15px;
    font-weight: 500;
    line-height: 1.2;
    position: relative;
    transition: color 0.18s ease;
}

.nav-link:hover {
    color: var(--color-primary-600);
}

.nav-link.active {
    color: var(--color-primary-700);
    font-weight: 600;
}

.nav-link.active::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: -1px;
    height: 2px;
    background: var(--color-primary-600);
    border-radius: 2px 2px 0 0;
}

.nav-link:focus-visible,
.header-cta:focus-visible,
.footer-links a:focus-visible,
.mobile-tab:focus-visible,
.faq-question:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 3px;
}

.header-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    padding: 0 18px;
    background: var(--color-primary-600);
    color: #fff;
    border-radius: var(--radius-btn);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: 0 4px 12px -6px rgba(33,104,143,0.55);
    transition: background 0.18s ease, transform 0.18s ease;
}

.header-cta:hover {
    background: var(--color-primary-700);
    color: #fff;
    transform: translateY(-2px);
}

.header-cta:active {
    transform: translateY(0);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.header-entry {
    display: block;
    padding: 10px 0 10px 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-primary-600);
}

.header-entry:hover {
    color: var(--color-primary-700);
}

.mobile-header-entry {
    display: none;
    min-height: 36px;
    padding: 8px 13px;
    border-radius: 8px;
    background: var(--color-primary-600);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.2;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.mobile-header-entry:hover {
    background: var(--color-primary-700);
    color: #fff;
}

/* ===== Mobile Bottom Tab ===== */
.mobile-tabbar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: #fff;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -8px 28px -12px rgba(23,50,77,0.16);
    padding-bottom: env(safe-area-inset-bottom);
}

.mobile-tabbar .tabbar-inner {
    display: flex;
    height: 64px;
    align-items: center;
    justify-content: space-around;
}

.mobile-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--color-text-muted);
    font-size: 11px;
    min-width: 58px;
    min-height: 48px;
    transition: color 0.18s ease;
    border-radius: 10px;
    padding: 6px 6px 4px;
}

.mobile-tab i {
    font-size: 19px;
    line-height: 1;
}

.mobile-tab span {
    line-height: 1.3;
}

.mobile-tab:hover,
.mobile-tab.active {
    color: var(--color-primary-600);
}

.mobile-tab.active span {
    font-weight: 600;
}

/* ===== Hero ===== */
.category-hero {
    position: relative;
    background: linear-gradient(135deg, #F0F8FC 0%, #E7F1F7 55%, #F8FBFD 100%);
    overflow: hidden;
    border-bottom: 1px solid var(--color-border);
}

.category-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.webp');
    background-size: cover;
    background-position: center 25%;
    opacity: 0.3;
}

.category-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(112deg, rgba(255,255,255,0.92) 20%, rgba(255,255,255,0.55) 78%);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 78px 0 68px;
    max-width: 920px;
}

.category-hero .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--color-primary-100);
    color: var(--color-primary-700);
    font-size: 13px;
    font-weight: 600;
    padding: 5px 13px;
    border-radius: 999px;
    margin-bottom: 20px;
}

.category-hero .hero-title {
    font-size: clamp(32px, 4.4vw, 50px);
    font-weight: 700;
    color: var(--color-text-strong);
    letter-spacing: 0.01em;
    line-height: 1.22;
    max-width: 100%;
}

.category-hero .hero-title span {
    color: var(--color-primary-600);
}

.category-hero .hero-sub {
    font-size: 17px;
    color: var(--color-text-body);
    max-width: 680px;
    margin-top: 22px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 28px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 22px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    transition: all 0.18s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary-600);
    color: #fff;
    box-shadow: 0 8px 18px -8px rgba(33,104,143,0.55);
}

.btn-primary:hover {
    background: var(--color-primary-700);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 12px 22px -10px rgba(33,104,143,0.55);
}

.btn-primary:active {
    transform: translateY(0px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary-600);
    border: 1px solid var(--color-primary-500);
}

.btn-outline:hover {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
    border-color: var(--color-primary-700);
    transform: translateY(-2px);
}

.hero-qr-tip {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
}

.hero-qr-tip i {
    color: var(--color-secondary);
    font-size: 15px;
}

/* ===== Page Main ===== */
.page-main {
    padding-bottom: 72px;
}

/* ===== Module headings ===== */
.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 38px;
    flex-wrap: wrap;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    font-size: 13px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 6px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 30px;
    font-weight: 700;
    color: var(--color-text-strong);
    letter-spacing: 0.01em;
    line-height: 1.3;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-body);
    max-width: 720px;
    margin-top: 10px;
    line-height: 1.75;
}

/* ===== Section spacing ===== */
.news-section {
    padding: 80px 0 36px;
}

.border-section {
    border-top: 1px solid var(--color-border);
}

.module-padding-bottom {
    padding-bottom: 56px;
}

/* ===== Info band / 实时更新条 ===== */
.info-band {
    margin: 20px 0 52px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-xs);
    overflow: hidden;
}

.info-band .band-title-row {
    background: var(--color-primary-50);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 22px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.band-title {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary-700);
}

.band-title i {
    color: var(--color-primary-500);
}

.band-update {
    font-size: 13px;
    color: var(--color-text-muted);
}

.band-inner {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 0;
}

.band-status-item {
    padding: 18px 22px;
    border-right: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 11px;
}

.band-status-item:last-child {
    border-right: none;
}

.status-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--color-secondary);
    box-shadow: 0 0 0 4px rgba(63,163,154,0.15);
    flex-shrink: 0;
}

.status-dot.warn {
    background: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(233,161,59,0.15);
}

.status-dot.info {
    background: var(--color-primary-500);
    box-shadow: 0 0 0 4px rgba(44,122,165,0.15);
}

.status-text b {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-strong);
    line-height: 1.3;
}

.status-text span {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.3;
    display: block;
}

/* ===== 资讯构成 2列不对称 ===== */
.asym-block {
    display: grid;
    grid-template-columns: 0.72fr 1.28fr;
    gap: 38px;
    align-items: start;
}

.asym-intro {
    position: sticky;
    top: 110px;
}

.asym-intro .intro-card {
    background: var(--color-primary-50);
    border-radius: var(--radius-card);
    padding: 32px;
    border: 1px solid var(--color-primary-100);
}

.news-flow-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.news-flow-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 24px 26px;
    box-shadow: var(--shadow-xs);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
    display: flex;
    gap: 18px;
}

.news-flow-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.news-flow-num {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
    background: var(--color-primary-100);
    color: var(--color-primary-700);
    font-size: 15px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    line-height: 1;
}

.news-flow-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-strong);
    margin-bottom: 8px;
}

.news-flow-body p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-body);
}

.news-flow-body .tag-line {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.mini-tag {
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 5px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.mini-tag.hot {
    background: rgba(233,161,59,0.13);
    color: #A96D17;
}

.mini-tag.new {
    background: rgba(63,163,154,0.12);
    color: #28796F;
}

/* ===== 时间轴版块 ===== */
.timeline-panel {
    background: var(--color-surface);
    border-radius: 20px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    padding: 32px 30px;
    position: relative;
    overflow: hidden;
}

.timeline-panel::before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center 8%;
    opacity: 0.04;
    z-index: 0;
    pointer-events: none;
}

.timeline-panel > * {
    position: relative;
    z-index: 1;
}

.timeline-grid {
    position: relative;
    margin-top: 28px;
}

.timeline-grid::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 17px;
    width: 2px;
    background: linear-gradient(180deg, rgba(44,122,165,0.12), var(--color-primary-100) 40%, rgba(63,163,154,0.14));
}

.timeline-row {
    position: relative;
    padding-left: 58px;
    padding-bottom: 30px;
}

.timeline-row:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 9px;
    top: 6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--color-primary-500);
    z-index: 2;
    box-shadow: 0 0 0 5px var(--color-primary-50);
}

.timeline-dot.alt {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 5px rgba(63,163,154,0.12);
}

.timeline-date {
    font-size: 13px;
    color: var(--color-primary-600);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 6px;
}

.timeline-date i {
    font-size: 13px;
}

.timeline-row h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-strong);
    line-height: 1.4;
    margin-bottom: 6px;
}

.timeline-row p {
    font-size: 15px;
    color: var(--color-text-body);
    line-height: 1.7;
    max-width: 760px;
}

.timeline-row .timeline-desc {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.tl-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    color: var(--color-text-body);
}

.tl-item i {
    color: var(--color-secondary);
}

/* ===== 应用场景 / 谁会关注 ===== */
.scene-wrap {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}

.scene-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 26px 24px;
    box-shadow: var(--shadow-xs);
    display: flex;
    gap: 18px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.scene-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.scene-icon {
    width: 50px;
    height: 50px;
    background: var(--color-primary-50);
    border-radius: 14px;
    color: var(--color-primary-600);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.scene-text h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text-strong);
    margin-bottom: 5px;
}

.scene-text p {
    font-size: 14px;
    color: var(--color-text-body);
    line-height: 1.65;
}

/* ===== 4步获取方法 ===== */
.step-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-top: 10px;
}

.step-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 26px 20px 22px;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-xs);
    transition: all 0.2s ease;
}

.step-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.step-num {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--color-primary-600);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 13px;
}

.step-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-strong);
    margin-bottom: 6px;
}

.step-card p {
    font-size: 14px;
    color: var(--color-text-body);
    line-height: 1.6;
}

/* ===== 栏目联动 ===== */
.related-card-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.simple-target-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: block;
}

.simple-target-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.simple-target-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.card-body {
    padding: 18px 18px 20px;
}

.card-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text-strong);
    margin-bottom: 6px;
    line-height: 1.4;
}

.card-body p {
    font-size: 14px;
    color: var(--color-text-body);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary-600);
    margin-top: 12px;
}

.card-link i {
    transition: transform 0.18s ease;
}

.simple-target-card:hover .card-link i {
    transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-section {
    padding: 64px 0 56px;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.faq-wrap {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-head-center {
    text-align: center;
    margin-bottom: 30px;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 0;
    box-shadow: var(--shadow-xs);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item.active {
    border-color: var(--color-primary-500);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    text-align: left;
    width: 100%;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text-strong);
    border-radius: 14px;
    min-height: 60px;
    line-height: 1.5;
}

.faq-question:hover {
    background: var(--color-primary-50);
}

.faq-icon {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--color-primary-50);
    color: var(--color-primary-600);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.24s ease, background 0.24s ease;
    font-weight: 300;
    position: relative;
}

.faq-icon::before,
.faq-icon::after {
    content: "";
    position: absolute;
}

.faq-icon::before {
    width: 10px;
    height: 2px;
    background: var(--color-primary-600);
}

.faq-icon::after {
    width: 2px;
    height: 10px;
    background: var(--color-primary-600);
    transition: opacity 0.2s ease;
}

.faq-item.active .faq-icon::after {
    opacity: 0;
}

.faq-item.active .faq-icon {
    transform: rotate(135deg);
    background: var(--color-primary-600);
    color: #fff;
}

.faq-item.active .faq-icon::before {
    background: #fff;
}

.faq-item.active .faq-icon::after {
    background: #fff;
    opacity: 0;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.faq-answer-inner {
    padding: 0 24px 22px;
    font-size: 15px;
    color: var(--color-text-body);
    line-height: 1.75;
}

.faq-item.active {
    background: var(--color-primary-50);
}

.faq-item.active .faq-answer {
    max-height: 400px;
}

/* ===== CTA band ===== */
.cta-module {
    margin: 80px 0 40px;
}

.cta-inner {
    background: #fff;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    border-radius: 24px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
}

.cta-left {
    background: var(--color-primary-50);
    padding: 40px 42px;
    position: relative;
}

.cta-left .small-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: var(--color-accent);
    color: #17324D;
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 40px;
    font-weight: 600;
    margin-bottom: 14px;
}

.cta-left h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text-strong);
    line-height: 1.4;
    margin-bottom: 12px;
}

.cta-left p {
    font-size: 15px;
    color: var(--color-text-body);
    line-height: 1.7;
    margin-bottom: 14px;
}

.cta-left .contact-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.cta-note {
    font-size: 13px;
    color: var(--color-text-muted);
}

.cta-right {
    padding: 36px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: linear-gradient(145deg, #fff, #f4fafc);
}

.cta-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
    max-width: 360px;
}

.cta-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.cta-form input,
.cta-form select {
    width: 100%;
    height: 44px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    padding: 0 14px;
    font-size: 14px;
    color: var(--color-text-strong);
    background: #fff;
    transition: border 0.18s ease, box-shadow 0.18s ease;
    font-family: var(--font-main);
}

.cta-form select {
    appearance: auto;
}

.cta-form input:focus,
.cta-form select:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(44,122,165,0.18);
}

.cta-form input::placeholder {
    color: var(--color-text-muted);
    opacity: 1;
}

.btn-full {
    width: 100%;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-footer);
    color: rgba(255,255,255,0.72);
    padding: 56px 0 24px;
    margin-top: 30px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 44px;
}

.footer-brand .brand {
    color: #fff;
    margin-bottom: 14px;
}

.footer-brand .brand-text {
    color: #fff;
}

.footer-brand .brand-text .brand-strong {
    color: #fff;
}

.footer-brand .brand-sub {
    background: rgba(255,255,255,0.12);
    color: rgba(255,255,255,0.9);
}

.footer-brand .brand-divider {
    color: rgba(255,255,255,0.3);
}

.footer-about {
    font-size: 14px;
    line-height: 1.75;
    color: rgba(255,255,255,0.68);
    margin: 16px 0 10px;
    max-width: 340px;
}

.footer-contact-item {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
}

.footer-col h3 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.68);
    font-size: 14px;
    transition: color 0.18s ease, padding-left 0.18s ease;
}

.footer-links a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 20px;
    margin-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 12px;
    color: rgba(255,255,255,0.5);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .related-card-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .main-nav .nav-link {
        padding-left: 9px;
        padding-right: 9px;
    }
    .header-right {
        display: none;
    }
    .band-inner {
        grid-template-columns: 1fr 1fr;
    }
    .band-status-item:nth-child(2) {
        border-right: none;
    }
    .band-status-item:nth-child(-n+2) {
        border-bottom: 1px solid var(--color-border);
    }
    .step-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .timeline-panel {
        padding: 26px 22px;
    }
}

@media (max-width: 860px) {
    .asym-block {
        grid-template-columns: 1fr;
        gap: 26px;
    }
    .asym-intro {
        position: static;
    }
    .intro-card {
        padding: 24px;
    }
    .scene-wrap {
        grid-template-columns: 1fr;
    }
    .cta-inner {
        grid-template-columns: 1fr;
    }
    .cta-left {
        padding: 30px 28px;
    }
    .cta-right {
        padding: 28px 24px;
    }
    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .site-header {
        height: 64px;
    }
    .main-nav {
        display: none;
    }
    .header-entry {
        display: none;
    }
    .mobile-header-entry {
        display: inline-flex;
    }
    .mobile-tabbar {
        display: block;
    }
    .section-title {
        font-size: 24px;
    }
    .category-hero .hero-content {
        padding: 58px 0 50px;
    }
    .category-hero .hero-sub {
        font-size: 16px;
    }
    .news-section {
        padding-top: 50px;
    }
    .page-main {
        padding-bottom: 88px;
    }
}

@media (max-width: 560px) {
    .container {
        padding: 0 16px;
    }
    .category-hero .hero-title {
        font-size: 29px;
        line-height: 1.26;
    }
    .category-hero .hero-sub {
        font-size: 15px;
        margin-top: 16px;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .hero-actions {
        margin-top: 20px;
        gap: 10px;
    }
    .band-inner {
        grid-template-columns: 1fr;
    }
    .band-status-item {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        padding: 14px 18px;
    }
    .band-status-item:first-child {
        border-top: 1px solid var(--color-border);
    }
    .band-status-item:last-child {
        border-bottom: none;
    }
    .band-inner {
        border-top: 1px solid var(--color-border);
    }
    .timeline-row {
        padding-left: 48px;
    }
    .timeline-panel {
        padding: 20px 16px;
    }
    .news-flow-item {
        padding: 18px 16px;
        flex-direction: column;
        gap: 10px;
    }
    .related-card-row {
        grid-template-columns: 1fr;
    }
    .step-grid {
        grid-template-columns: 1fr;
    }
    .scene-card {
        padding: 20px 16px;
        flex-direction: column;
        gap: 10px;
    }
    .footer-main {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
    .section-head {
        margin-bottom: 24px;
    }
    .info-band {
        margin-bottom: 34px;
    }
    .cta-module {
        margin-top: 50px;
    }
    .faq-section {
        padding: 44px 0 38px;
    }
}

/* roulang page: category4 */
:root {
  --color-primary-700: #1A5A80;
  --color-primary-600: #21688F;
  --color-primary-500: #2C7AA5;
  --color-primary-100: #DCEDF5;
  --color-primary-50: #EDF6FA;
  --color-secondary: #3FA39A;
  --color-accent: #E9A13B;
  --color-surface: #FFFFFF;
  --color-canvas: #F6FAFC;
  --color-text-strong: #17324D;
  --color-text-body: #3B5266;
  --color-text-muted: #7A8FA0;
  --color-border: #E3ECF3;
  --color-footer: #102A40;
  --radius-card: 16px;
  --radius-btn: 8px;
  --shadow-xs: 0 1px 2px rgba(23,50,77,.06);
  --shadow-sm: 0 4px 16px -8px rgba(23,50,77,.12);
  --shadow-md: 0 16px 36px -16px rgba(23,50,77,.18);
  --font-sans: "PingFang SC","Microsoft YaHei","Source Han Sans CN","Noto Sans CJK SC",sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-body);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section {
  padding: 72px 0;
}

.section-fill {
  background: var(--color-surface);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(8px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary-600);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .02em;
}

.brand-text {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  color: var(--color-text-strong);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
  white-space: nowrap;
}

.brand-text span:last-child {
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .02em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  position: relative;
  height: 72px;
  padding: 0 16px;
  color: var(--color-text-body);
  font-size: 15px;
  font-weight: 500;
  transition: color .18s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: transparent;
  transition: background .18s ease;
}

.nav-link:hover {
  color: var(--color-primary-600);
}

.nav-link.active {
  color: var(--color-primary-700);
  font-weight: 600;
}

.nav-link.active::after {
  background: var(--color-primary-500);
}

.nav-contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  background: var(--color-primary-600);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background .18s ease, transform .18s ease, box-shadow .18s ease;
}

.nav-contact-btn:hover {
  background: var(--color-primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.nav-contact-btn:active {
  transform: translateY(0);
}

/* ===== Mobile Bottom Nav ===== */
.bottom-tabbar {
  display: none;
}

/* ===== Hero ===== */
.help-hero {
  position: relative;
  padding: 78px 0 64px;
  background:
    linear-gradient(110deg, rgba(255,255,255,.94) 0%, rgba(237,246,250,.92) 55%, rgba(220,237,245,.78) 100%),
    url("/assets/images/backpic/back-1.png") center / cover no-repeat;
  border-bottom: 1px solid var(--color-border);
}

.crumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.crumbs a {
  transition: color .18s ease;
}

.crumbs a:hover {
  color: var(--color-primary-600);
}

.crumbs .sep {
  color: var(--color-border);
}

.help-hero-grid {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary-600);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  background: var(--color-primary-100);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 16px;
}

.eyebrow i {
  font-size: 12px;
}

.help-hero h1 {
  color: var(--color-text-strong);
  font-size: clamp(32px, 4.4vw, 50px);
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: .01em;
}

.help-hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-body);
  max-width: 620px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border: none;
  border-radius: var(--radius-btn);
  background: var(--color-primary-600);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background .18s ease, transform .18s ease, box-shadow .18s ease;
}

.btn-primary:hover {
  background: var(--color-primary-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid var(--color-primary-500);
  border-radius: var(--radius-btn);
  background: transparent;
  color: var(--color-primary-600);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background .18s ease, transform .18s ease, border-color .18s ease;
}

.btn-secondary:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-700);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0);
}

.hero-quick-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  padding: 28px;
}

.hero-quick-card h2 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text-strong);
  margin-bottom: 10px;
}

.hero-quick-list {
  border-top: 1px solid var(--color-border);
  margin-top: 14px;
}

.hero-quick-list li {
  border-bottom: 1px solid var(--color-border);
}

.hero-quick-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 2px;
  color: var(--color-text-body);
  font-size: 15px;
  transition: color .18s ease, padding-left .18s ease;
}

.hero-quick-list a:hover {
  color: var(--color-primary-600);
  padding-left: 6px;
}

.hero-quick-list i {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-50);
  color: var(--color-primary-600);
  border-radius: 8px;
  font-size: 14px;
}

.hero-quick-foot {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 14px;
}

/* ===== Section headings ===== */
.sec-head {
  max-width: 840px;
  margin-bottom: 42px;
}

.sec-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.sec-title {
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--color-text-strong);
  letter-spacing: .01em;
  margin-bottom: 10px;
}

.sec-subtitle {
  color: var(--color-text-body);
  font-size: 16px;
  line-height: 1.8;
  max-width: 760px;
}

.sec-head.center .sec-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ===== Quick Topics ===== */
.help-cat-desc {
  background: var(--color-primary-50);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px 22px;
  color: var(--color-text-body);
  font-size: 15px;
  line-height: 1.9;
  margin-top: -24px;
  margin-bottom: 48px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.quick-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-xs);
  padding: 24px 22px;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.quick-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary-100);
  box-shadow: var(--shadow-md);
}

.quick-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-primary-50);
  color: var(--color-primary-600);
  border-radius: 12px;
  font-size: 18px;
  margin-bottom: 16px;
}

.quick-card h3 {
  color: var(--color-text-strong);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.quick-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* ===== Feature Guide Modules ===== */
.feature-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  margin-bottom: 40px;
}

.feature-copy {
  padding: 34px 40px;
}

.feature-copy.has-list {
  padding: 30px 10px 30px 40px;
}

.feature-copy h2 {
  font-size: clamp(21px, 2vw, 27px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--color-text-strong);
  margin-bottom: 12px;
}

.feature-copy > p {
  color: var(--color-text-body);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 18px;
}

.step-list {
  display: grid;
  gap: 14px;
  margin-bottom: 20px;
}

.step-list li {
  display: flex;
  gap: 13px;
  align-items: flex-start;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 28px;
  height: 28px;
  border-radius: 10px;
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  font-weight: 700;
  font-size: 13px;
  margin-top: 2px;
}

.step-list strong {
  color: var(--color-text-strong);
  font-weight: 600;
}

.step-list p {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

.feature-visual {
  position: relative;
  min-height: 260px;
}

.feature-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-visual .cover-note {
  position: absolute;
  left: 14px;
  bottom: 14px;
  background: rgba(255,255,255,.95);
  color: var(--color-text-strong);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  box-shadow: var(--shadow-xs);
}

.feature-visual img {
  height: 100%;
  min-height: 300px;
}

/* ===== Troubleshoot cards ===== */
.trouble-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.trouble-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-xs);
  padding: 24px;
  transition: box-shadow .18s ease, transform .18s ease;
}

.trouble-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.trouble-title {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.trouble-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--color-primary-50);
  color: var(--color-primary-600);
  font-size: 14px;
}

.trouble-title h3 {
  color: var(--color-text-strong);
  font-size: 17px;
  line-height: 1.45;
  font-weight: 700;
  padding-top: 2px;
}

.trouble-card dl {
  display: grid;
  gap: 8px;
}

.trouble-card dl div {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 8px;
  font-size: 14px;
  line-height: 1.7;
}

.trouble-card dt {
  color: var(--color-text-muted);
  font-weight: 500;
}

.trouble-card dd {
  color: var(--color-text-body);
}

/* ===== Process Flow ===== */
.steps-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 30px;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-step {
  position: relative;
  text-align: left;
  padding-top: 8px;
}

.process-step::after {
  content: "";
  position: absolute;
  top: 28px;
  left: 56px;
  right: -16px;
  height: 1px;
  background: var(--color-border);
}

.process-step:last-child::after {
  display: none;
}

.process-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  font-weight: 800;
  font-size: 16px;
  margin-bottom: 14px;
}

.process-step h3 {
  font-size: 16px;
  color: var(--color-text-strong);
  font-weight: 700;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-xs);
  margin-bottom: 14px;
  padding: 4px 24px;
  transition: background .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.faq-item[open] {
  background: var(--color-primary-50);
  border-color: var(--color-primary-500);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  color: var(--color-text-strong);
  line-height: 1.6;
  min-height: 44px;
  transition: color .18s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--color-primary-600);
}

.faq-icon {
  flex: 0 0 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  position: relative;
  margin-left: 14px;
}

.faq-icon i {
  color: var(--color-primary-600);
  transition: transform .18s ease;
}

.faq-item[open] .faq-icon i {
  transform: rotate(45deg);
}

.faq-answer {
  color: var(--color-text-body);
  line-height: 1.8;
  font-size: 15px;
  padding-bottom: 20px;
  border-top: 1px solid rgba(44,122,165,.2);
  padding-top: 14px;
}

.faq-answer a {
  color: var(--color-primary-600);
  border-bottom: 1px solid var(--color-primary-100);
}

.faq-answer a:hover {
  border-bottom-color: var(--color-primary-600);
}

/* ===== Contact CTA ===== */
.contact-panel {
  position: relative;
  background: linear-gradient(120deg, #123F5C, #102A40);
  border-radius: 24px;
  padding: 46px;
  color: #fff;
  overflow: hidden;
}

.contact-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/assets/images/backpic/back-2.webp") right bottom / cover no-repeat;
  opacity: .14;
}

.contact-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  align-items: start;
}

.contact-info h2 {
  font-size: clamp(25px, 2.4vw, 32px);
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 14px;
  color: #fff;
}

.contact-info p {
  color: rgba(255,255,255,.82);
  line-height: 1.8;
  font-size: 15px;
  margin-bottom: 24px;
}

.contact-services {
  display: grid;
  gap: 14px;
}

.contact-services li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,.9);
  line-height: 1.6;
}

.contact-services i {
  color: var(--color-accent);
  margin-top: 4px;
}

.contact-form {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 20px 40px rgba(0,0,0,.2);
  padding: 28px;
}

.contact-form label {
  display: block;
  color: var(--color-text-strong);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-form input,
.contact-form select {
  width: 100%;
  height: 46px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--color-text-strong);
  background: #fff;
  margin-bottom: 16px;
  transition: border-color .18s ease, box-shadow .18s ease;
}

.contact-form input:focus,
.contact-form select:focus {
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(44,122,165,.18);
  outline: none;
}

.contact-form .btn-primary {
  width: 100%;
  margin-top: 6px;
}

.form-note {
  font-size: 12px;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 10px;
}

.form-success {
  display: none;
  background: #E7F5F1;
  color: #1F6E5C;
  font-size: 14px;
  line-height: 1.7;
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.form-success.show {
  display: block;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-footer);
  color: rgba(255,255,255,.85);
  margin-top: 40px;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.3fr .75fr .9fr 1fr;
  gap: 36px;
  padding: 56px 0 38px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand .brand .brand-mark {
  background: var(--color-primary-500);
}

.brand-divider {
  color: rgba(255,255,255,.3);
}

.footer-about {
  color: rgba(255,255,255,.7);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 18px;
  max-width: 340px;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.85);
  font-size: 14px;
}

.footer-col h3 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: .02em;
}

.footer-links {
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: rgba(255,255,255,.72);
  font-size: 14px;
  line-height: 1.6;
  transition: color .18s ease, padding-left .18s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: #fff;
  padding-left: 5px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  font-size: 13px;
  color: rgba(255,255,255,.55);
}

.footer-bottom span:last-child {
  max-width: 600px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }

  .quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trouble-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 36px;
  }

  .process-step::after {
    display: none;
  }

  .help-hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-quick-card {
    max-width: 680px;
  }

  .feature-band {
    grid-template-columns: 1fr;
  }

  .feature-copy.has-list {
    padding-right: 40px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 820px) {
  .bottom-tabbar {
    display: flex;
    position: fixed;
    z-index: 90;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(64px + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: rgba(255,255,255,.98);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -6px 18px rgba(23,50,77,.08);
  }

  .bottom-tabbar a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--color-text-muted);
    font-size: 12px;
    line-height: 1.2;
    min-height: 52px;
    transition: color .18s ease;
  }

  .bottom-tabbar a i {
    font-size: 18px;
  }

  .bottom-tabbar a.active {
    color: var(--color-primary-600);
    font-weight: 600;
  }

  .section {
    padding: 54px 0;
  }

  .nav-contact-btn {
    height: 38px;
    padding: 0 14px;
    font-size: 13px;
  }

  .site-footer {
    margin-bottom: calc(64px + env(safe-area-inset-bottom));
    margin-top: 0;
  }
}

@media (max-width: 620px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-header {
    height: 62px;
  }

  .nav-wrap {
    height: 62px;
  }

  .brand-text {
    font-size: 16px;
  }

  .brand-sub {
    display: none;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 17px;
  }

  .help-hero {
    padding: 52px 0 40px;
  }

  .help-hero h1 {
    font-size: 32px;
  }

  .help-hero-desc {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
  }

  .sec-head {
    margin-bottom: 30px;
  }

  .sec-title {
    font-size: 25px;
  }

  .sec-subtitle {
    font-size: 15px;
  }

  .help-cat-desc {
    margin-top: -12px;
    padding: 16px;
    font-size: 14px;
  }

  .quick-grid {
    grid-template-columns: 1fr;
  }

  .feature-copy.has-list {
    padding: 24px 20px;
  }

  .feature-copy {
    padding: 24px 20px;
  }

  .feature-band {
    margin-bottom: 20px;
    gap: 0;
  }

  .feature-visual img {
    min-height: 210px;
  }

  .trouble-grid {
    grid-template-columns: 1fr;
  }

  .process-grid {
    grid-template-columns: 1fr;
    row-gap: 26px;
  }

  .steps-panel {
    padding: 22px 16px;
  }

  .contact-panel {
    padding: 30px 16px;
    border-radius: 18px;
  }

  .contact-form {
    padding: 22px 16px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 44px 0 32px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}