/* roulang page: index */
:root{
  --bg-0:#060A14;
  --bg-1:#0B1322;
  --bg-2:#101B2E;
  --brand-500:#12B8D8;
  --brand-600:#0E93AE;
  --brand-300:#6FE3F5;
  --accent-500:#7B5CFF;
  --accent-300:#A996FF;
  --warm-500:#FF9A3D;
  --text-1:#E9F2F8;
  --text-2:#9DB2C6;
  --text-3:#6B8199;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(111,227,245,.22);
  --glass:rgba(255,255,255,.045);
  --glass-hi:rgba(255,255,255,.08);
  --r-sm:8px;
  --r-btn:12px;
  --r-card:18px;
  --r-lg:24px;
  --shadow-card:0 20px 40px -28px rgba(0,0,0,.9);
  --shadow-hover:0 26px 56px -26px rgba(0,0,0,.95);
  --sect:104px;

  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--text-1);
  --bs-border-color:var(--line);
  --bs-primary-rgb:18,184,216;
  --bs-link-color:var(--brand-300);
  --bs-link-hover-color:#ffffff;
  --bs-border-radius:var(--r-btn);
  --bs-border-radius-lg:var(--r-card);
  --bs-border-radius-sm:var(--r-sm);
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.85;
  color:var(--text-1);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 520px at 12% -8%, rgba(18,184,216,.16), transparent 62%),
    radial-gradient(760px 460px at 92% 4%, rgba(123,92,255,.14), transparent 60%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-300);text-decoration:none;transition:color .2s ease-out}
a:hover{color:#fff}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding-left:0;list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}
::selection{background:rgba(18,184,216,.3);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:999px}

.container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto}
@media (min-width:1400px){.container{max-width:1280px}}
@media (max-width:575px){.container{padding-left:16px;padding-right:16px}}

.skip-link{position:absolute;left:-9999px;top:0;z-index:2000;background:var(--brand-500);color:#04121A;padding:10px 18px;border-radius:0 0 12px 0}
.skip-link:focus{left:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease-out,border-color .25s ease-out,backdrop-filter .25s ease-out;
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.85);
  backdrop-filter:blur(12px) saturate(130%);
  -webkit-backdrop-filter:blur(12px) saturate(130%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--text-1)}
.brand:hover{color:var(--text-1)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  box-shadow:0 0 0 1px rgba(111,227,245,.35),0 10px 24px -12px rgba(18,184,216,.8);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:10px;
  font-size:14.5px;color:var(--text-2);white-space:nowrap;transition:color .2s ease-out,background .2s ease-out;
}
.nav-link:hover{color:var(--text-1);background:var(--glass)}
.nav-link.active{color:var(--brand-300);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--brand-300));
  box-shadow:0 0 10px rgba(111,227,245,.8);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:12px}
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;border:0;border-radius:999px;
  font-size:14.5px;font-weight:700;color:#04121A;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  box-shadow:0 0 0 1px rgba(111,227,245,.45),0 10px 30px -8px rgba(18,184,216,.6);
  transition:transform .2s ease-out,box-shadow .2s ease-out,filter .2s ease-out;
  white-space:nowrap;
}
.btn-glow:hover{color:#04121A;transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 0 0 1px rgba(111,227,245,.6),0 16px 38px -8px rgba(18,184,216,.75)}
.btn-glow:active{transform:translateY(0);box-shadow:inset 0 3px 10px rgba(0,0,0,.35)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:var(--text-1);
  background:transparent;border:1px solid var(--line-strong);
  transition:background .2s ease-out,border-color .2s ease-out,transform .2s ease-out;
  white-space:nowrap;
}
.btn-ghost:hover{color:#fff;background:var(--glass-hi);border-color:var(--brand-500);transform:translateY(-2px)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass);color:var(--text-1);align-items:center;justify-content:center;
}
.nav-toggle svg{width:20px;height:20px}
@media (max-width:991px){
  .nav-links{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    background:rgba(8,13,26,.97);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    padding:8px 16px 18px;
    max-height:0;overflow:hidden;opacity:0;pointer-events:none;
    transition:max-height .3s ease-out,opacity .25s ease-out;
  }
  .site-header.nav-open .nav-links{max-height:70vh;overflow:auto;opacity:1;pointer-events:auto}
  .nav-link{padding:15px 8px;border-bottom:1px solid var(--line);border-radius:0;font-size:15px;min-height:44px;display:flex;align-items:center}
  .nav-link.active::after{left:8px;right:auto;width:28px;bottom:8px}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-right{margin-left:0;gap:8px}
  .nav-cta{display:none}
}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:96px 0 88px;
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.png);
  background-size:cover;background-position:center;
  opacity:.4;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,.72) 0%,rgba(6,10,20,.9) 55%,rgba(6,10,20,.98) 100%);
}
.hero::after{
  content:"";position:absolute;width:720px;height:720px;right:-160px;top:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,184,216,.3),transparent 62%);
  pointer-events:none;
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.12em;color:var(--brand-300);
  padding:7px 14px;border-radius:999px;
  background:rgba(18,184,216,.1);border:1px solid rgba(111,227,245,.24);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-300);box-shadow:0 0 10px var(--brand-300)}
.hero h1{
  margin-top:22px;
  font-size:clamp(30px,4.2vw,52px);
  line-height:1.15;font-weight:800;letter-spacing:-.02em;
}
.hero h1 span{
  background:linear-gradient(120deg,var(--brand-300),var(--accent-300));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.85;color:var(--text-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-row{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:36px;padding-top:26px;border-top:1px solid var(--line)}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-2)}
.trust-item svg{width:18px;height:18px;color:var(--brand-300);flex:0 0 18px}
.hero-visual{position:relative}
.glass-panel{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.glass-panel img{aspect-ratio:16/10;object-fit:cover;width:100%}
.float-card{
  position:absolute;left:-22px;bottom:26px;
  min-width:196px;padding:16px 20px;border-radius:16px;
  background:rgba(16,27,46,.9);
  backdrop-filter:blur(14px);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card);
}
.float-card .fc-num{font-size:28px;font-weight:800;color:var(--brand-300);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.float-card .fc-label{font-size:12.5px;color:var(--text-2);margin-top:2px}
.float-card+.float-card{left:auto;right:-14px;top:-18px;bottom:auto;min-width:170px}
@media (max-width:991px){
  .hero{padding:64px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:2}
  .float-card{left:10px;bottom:14px;min-width:160px;padding:12px 16px}
  .float-card+.float-card{right:10px;top:-14px}
}
@media (max-width:575px){
  .hero{padding:52px 0 52px}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{flex:1 1 auto}
  .float-card{display:none}
}

/* ---------- section base ---------- */
.section{padding:var(--sect) 0}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (max-width:991px){.section{padding:64px 0}}
@media (max-width:575px){.section{padding:56px 0}}
.section-head{margin-bottom:40px}
.section-head .eyebrow{margin-bottom:16px}
.section-head h2{
  font-size:clamp(24px,2.6vw,36px);line-height:1.25;font-weight:700;letter-spacing:-.01em;
  margin-top:14px;
}
.section-head h2::before{
  content:"";display:block;width:44px;height:3px;border-radius:3px;margin-bottom:16px;
  background:linear-gradient(90deg,var(--brand-500),transparent);
}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16px;max-width:720px}
.section-head.split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;
  color:var(--brand-300);padding-bottom:3px;
  background-image:linear-gradient(var(--brand-300),var(--brand-300));
  background-repeat:no-repeat;background-size:0% 2px;background-position:0 100%;
  transition:background-size .24s ease-out,color .2s ease-out;
}
.link-more:hover{color:#fff;background-size:100% 2px}

/* ---------- services ---------- */
.svc-left h3{font-size:22px;font-weight:700;margin-top:18px}
.svc-left p{color:var(--text-2);margin-top:14px}
.svc-points{margin-top:26px;display:flex;flex-direction:column;gap:12px}
.svc-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2)}
.svc-points svg{width:18px;height:18px;color:var(--brand-500);flex:0 0 18px;margin-top:3px}
.num-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.num-card{
  position:relative;padding:26px 24px;border-radius:var(--r-card);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.num-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.num-card .idx{
  font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--brand-300);
  font-variant-numeric:tabular-nums;
}
.num-card .ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin:16px 0 16px;
  background:rgba(18,184,216,.12);border:1px solid rgba(111,227,245,.24);color:var(--brand-300);
}
.num-card .ico svg{width:21px;height:21px}
.num-card h3{font-size:18px;font-weight:700;line-height:1.4}
.num-card p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.7}
@media (max-width:767px){.num-grid{grid-template-columns:1fr}}

/* ---------- stat band ---------- */
.stat-band{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:64px 0}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.stat-item{padding:0 26px;text-align:center;border-left:1px solid var(--line)}
.stat-item:first-child{border-left:0}
.stat-num{
  font-size:clamp(34px,4vw,52px);font-weight:800;line-height:1.1;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(120deg,var(--brand-300),var(--accent-300));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-num small{font-size:.5em;font-weight:700;margin-left:4px;letter-spacing:0}
.stat-label{margin-top:10px;font-size:14px;color:var(--text-2)}
@media (max-width:767px){
  .stat-band{padding:44px 0}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 0}
  .stat-item:nth-child(odd){border-left:0}
  .stat-item:nth-child(n+3){padding-top:28px;border-top:1px solid var(--line)}
}

/* ---------- cases ---------- */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.case-row+.case-row{margin-top:72px}
.case-row.reverse .case-media{order:2}
.case-media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-card);background:var(--bg-2);
}
.case-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .4s ease-out}
.case-media:hover img{transform:scale(1.03)}
.case-body h3{font-size:clamp(20px,2vw,24px);font-weight:700;line-height:1.4;margin-top:14px}
.case-body p{margin-top:14px;color:var(--text-2);font-size:15.5px}
.case-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.tag{
  display:inline-block;padding:5px 12px;border-radius:999px;font-size:12.5px;
  background:rgba(123,92,255,.14);color:var(--accent-300);border:1px solid rgba(123,92,255,.26);
}
.tag.brand{background:rgba(18,184,216,.12);color:var(--brand-300);border-color:rgba(111,227,245,.24)}
.case-body .link-more{margin-top:22px}
@media (max-width:991px){
  .case-row{grid-template-columns:1fr;gap:26px}
  .case-row.reverse .case-media{order:0}
  .case-row+.case-row{margin-top:56px}
}

/* ---------- solutions ---------- */
.sol-wrap{display:grid;grid-template-columns:320px minmax(0,1fr);gap:32px;align-items:start}
.sol-nav{display:flex;flex-direction:column;gap:10px;position:sticky;top:96px}
.sol-nav .nav-link{
  width:100%;text-align:left;padding:18px 20px;border-radius:14px;font-size:15px;font-weight:600;
  background:var(--glass);border:1px solid var(--line);color:var(--text-2);margin:0;
  display:block;
}
.sol-nav .nav-link::after{display:none}
.sol-nav .nav-link small{display:block;font-weight:400;font-size:13px;color:var(--text-3);margin-top:6px;line-height:1.5}
.sol-nav .nav-link:hover{border-color:var(--line-strong);color:var(--text-1)}
.sol-nav .nav-link.active{
  background:linear-gradient(135deg,rgba(18,184,216,.18),rgba(123,92,255,.12));
  border-color:var(--line-strong);color:var(--brand-300);
  box-shadow:0 0 0 1px rgba(111,227,245,.18),0 14px 32px -22px rgba(18,184,216,.9);
}
.sol-panel{
  padding:32px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.sol-panel h3{font-size:22px;font-weight:700;line-height:1.4}
.sol-panel>p{margin-top:14px;color:var(--text-2);font-size:15.5px}
.sol-panel img{border-radius:16px;margin-top:24px;width:100%;aspect-ratio:16/9;object-fit:cover}
.sol-list{margin-top:22px;display:grid;gap:10px}
.sol-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2)}
.sol-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-500);
  margin-top:10px;flex:0 0 6px;box-shadow:0 0 8px rgba(18,184,216,.9);
}
@media (max-width:991px){
  .sol-wrap{grid-template-columns:1fr;gap:22px}
  .sol-nav{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px;gap:8px}
  .sol-nav .nav-link{min-width:210px;flex:0 0 auto}
  .sol-panel{padding:24px}
}

/* ---------- news ---------- */
.news-card{
  height:100%;display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.news-thumb{display:block;overflow:hidden;background:var(--bg-2)}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease-out}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.news-body{padding:22px 22px 20px;display:flex;flex-direction:column;flex:1 1 auto}
.badge-cat{
  align-self:flex-start;padding:4px 12px;border-radius:999px;font-size:12.5px;
  background:rgba(123,92,255,.16);color:var(--accent-300);border:1px solid rgba(123,92,255,.28);
}
.news-title{margin-top:14px;font-size:18px;font-weight:700;line-height:1.45}
.news-title a{color:var(--text-1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title a:hover{color:var(--brand-300)}
.news-sum{
  margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.7;flex:1 1 auto;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.news-foot .link-more{font-size:13.5px}
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;
  padding:52px 24px;border-radius:var(--r-card);
  background:var(--glass);border:1px dashed var(--line-strong);
}
.empty-state svg{width:34px;height:34px;color:var(--brand-300)}
.empty-state p{color:var(--text-2);font-size:15px}
.empty-state .btn-ghost{margin-top:6px}
@media (max-width:575px){.news-body{padding:18px}}

/* ---------- faq ---------- */
.faq-wrap{display:grid;grid-template-columns:320px minmax(0,1fr);gap:44px;align-items:start}
.faq-intro h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.28;margin-top:14px}
.faq-intro h2::before{content:"";display:block;width:44px;height:3px;border-radius:3px;margin-bottom:16px;background:linear-gradient(90deg,var(--brand-500),transparent)}
.faq-intro p{margin-top:16px;color:var(--text-2);font-size:15px}
.accordion-item{
  background:transparent;border:1px solid var(--line);border-radius:14px !important;
  margin-bottom:12px;overflow:hidden;
}
.accordion-item:last-child{margin-bottom:0}
.accordion-button{
  position:relative;width:100%;padding:20px 56px 20px 26px;
  background:transparent;color:var(--text-1);font-size:16px;font-weight:600;line-height:1.6;
  border:0;box-shadow:none;text-align:left;
}
.accordion-button::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--brand-500),transparent);opacity:0;transition:opacity .2s ease-out;
}
.accordion-button:not(.collapsed)::before{opacity:1}
.accordion-button::after{
  content:"";position:absolute;right:22px;top:50%;width:14px;height:14px;
  transform:translateY(-50%) rotate(0deg);
  background:
    linear-gradient(var(--brand-300),var(--brand-300)) center/14px 2px no-repeat,
    linear-gradient(var(--brand-300),var(--brand-300)) center/2px 14px no-repeat;
  transition:transform .26s ease-out;
}
.accordion-button:not(.collapsed){color:var(--brand-300);background:rgba(18,184,216,.06)}
.accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(135deg)}
.accordion-button:focus{box-shadow:none;outline:none}
.accordion-button:focus-visible{outline:2px solid var(--brand-500);outline-offset:-3px}
.accordion-body{
  padding:0 26px 22px;font-size:15px;color:var(--text-2);line-height:1.85;
  background:transparent;
}
.accordion-button:not(.collapsed)+.accordion-body{}
.accordion-item:has(.accordion-button:not(.collapsed)){background:var(--glass);border-color:var(--line-strong)}
@media (max-width:991px){.faq-wrap{grid-template-columns:1fr;gap:28px}}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:32px;align-items:start}
.form-card{
  padding:32px;border-radius:var(--r-lg);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.form-card h3{font-size:20px;font-weight:700}
.form-card .hint{margin-top:8px;font-size:14px;color:var(--text-2)}
.field{margin-top:20px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px}
.field label .req{color:var(--warm-500);margin-left:4px}
.form-control,.form-select{
  width:100%;padding:13px 16px;border-radius:12px;
  background:rgba(6,10,20,.6);border:1px solid var(--line);
  color:var(--text-1);font-size:15px;line-height:1.6;
  transition:border-color .2s ease-out,box-shadow .2s ease-out,background .2s ease-out;
  appearance:none;
}
.form-select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236FE3F5'%3E%3Cpath d='M8 11.5 3.2 6.2l1.2-1.1L8 9.3l3.6-4.2 1.2 1.1z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;background-size:16px;
  padding-right:42px;
}
.form-control::placeholder{color:var(--text-3)}
.form-control:focus,.form-select:focus{
  outline:none;background:rgba(6,10,20,.85);
  border-color:var(--brand-500);box-shadow:0 0 0 4px rgba(18,184,216,.18);
}
textarea.form-control{min-height:130px;resize:vertical}
.check-row{display:flex;align-items:flex-start;gap:10px;margin-top:20px;font-size:13.5px;color:var(--text-2)}
.check-row input{
  width:18px;height:18px;margin-top:4px;flex:0 0 18px;accent-color:var(--brand-500);
  border-radius:4px;
}
.form-card .btn-glow{width:100%;margin-top:24px;padding:14px 24px;font-size:15.5px}
.form-card .btn-glow[disabled]{filter:grayscale(.3);cursor:not-allowed;transform:none}
.form-note{margin-top:14px;font-size:12.5px;color:var(--text-3);text-align:center}
.info-card{
  padding:30px;border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(18,184,216,.1),rgba(123,92,255,.08));
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.info-card h3{font-size:20px;font-weight:700}
.info-list{margin-top:22px;display:flex;flex-direction:column;gap:16px}
.info-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--text-2)}
.info-list svg{width:20px;height:20px;color:var(--brand-300);flex:0 0 20px;margin-top:3px}
.info-list strong{display:block;color:var(--text-1);font-size:15px;margin-bottom:2px}
.info-card img{border-radius:16px;margin-top:24px;width:100%;aspect-ratio:16/10;object-fit:cover}
@media (max-width:991px){.contact-grid{grid-template-columns:1fr}}

.cta-band{
  margin-top:var(--sect);
  border-radius:var(--r-lg);
  padding:44px 40px;
  background:linear-gradient(120deg,rgba(18,184,216,.16),rgba(123,92,255,.12));
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  box-shadow:var(--shadow-card);
}
.cta-band h3{font-size:clamp(20px,2.2vw,26px);font-weight:700;line-height:1.4}
.cta-band p{margin-top:8px;color:var(--text-2);font-size:15px}
@media (max-width:767px){.cta-band{padding:32px 24px;margin-top:64px}}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand .brand-mark{width:38px;height:38px;flex:0 0 38px}
.footer-brand strong{font-size:16px;font-weight:800}
.footer-about{margin-top:18px;font-size:14px;color:var(--text-2);line-height:1.8;max-width:320px}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text-1);letter-spacing:.04em;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand-300)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);line-height:1.7}
.footer-contact svg{width:17px;height:17px;color:var(--brand-300);flex:0 0 17px;margin-top:4px}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
@media (max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:34px}}
@media (max-width:575px){.footer-grid{grid-template-columns:1fr;gap:30px}.site-footer{padding-top:56px}}

/* ---------- mobile tabbar ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;display:none;
  background:rgba(8,13,26,.96);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:grid;grid-template-columns:repeat(5,1fr)}
.tab-item{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  padding:9px 2px 8px;min-height:58px;color:var(--text-3);font-size:10.5px;line-height:1.2;
}
.tab-item svg{width:22px;height:22px}
.tab-item.active{color:var(--brand-300)}
.tab-item.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;
  background:var(--brand-500);box-shadow:0 0 10px var(--brand-500);
}
.tab-item.active svg{filter:drop-shadow(0 0 6px rgba(111,227,245,.7))}
@media (max-width:991px){
  .tabbar{display:block}
  body{padding-bottom:86px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}
.reveal{opacity:0;transform:translateY(12px)}
.reveal.in{opacity:1;transform:none;transition:opacity .5s ease-out,transform .5s ease-out}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}}

/* roulang page: article */
:root{
  --bg-0:#060A14;--bg-1:#0B1322;--bg-2:#101B2E;
  --brand-500:#12B8D8;--brand-600:#0E93AE;--brand-300:#6FE3F5;
  --accent-500:#7B5CFF;--accent-300:#A996FF;
  --warm-500:#FF9A3D;
  --text-1:#E9F2F8;--text-2:#9DB2C6;--text-3:#6B8199;
  --line:rgba(255,255,255,.08);--line-strong:rgba(111,227,245,.22);
  --glass:rgba(255,255,255,.045);--glass-hi:rgba(255,255,255,.08);
  --r-sm:8px;--r-btn:12px;--r-card:18px;--r-lg:22px;--r-pill:999px;
  --shadow-1:0 20px 40px -28px rgba(0,0,0,.9);
  --shadow-2:0 26px 56px -26px rgba(0,0,0,.95);
  --ff:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --bs-body-bg:var(--bg-0);--bs-body-color:var(--text-1);--bs-border-color:var(--line);
  --bs-border-radius:12px;--bs-border-radius-lg:18px;--bs-font-sans-serif:var(--ff);
  --bs-link-color:var(--brand-300);--bs-link-hover-color:#ffffff;
  --bs-primary-rgb:18,184,216;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg-0);color:var(--text-1);font-family:var(--ff);
  font-size:16px;line-height:1.85;letter-spacing:.005em;
  overflow-x:hidden;
  background-image:radial-gradient(900px 520px at 82% -8%,rgba(123,92,255,.16),transparent 62%),
                   radial-gradient(760px 460px at 6% 4%,rgba(18,184,216,.14),transparent 64%);
  background-repeat:no-repeat;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-300);text-decoration:none;transition:color .2s ease-out}
a:hover{color:#fff}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text-1)}
p{margin:0 0 1.15em}
::selection{background:rgba(18,184,216,.3);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:999px}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1400px){.container{max-width:1280px}}
@media (max-width:575.98px){.container{padding:0 16px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,10,20,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);transition:background .22s ease-out,border-color .22s ease-out;
}
.site-header.is-scrolled{background:rgba(6,10,20,.9);border-bottom-color:var(--line-strong)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex:0 0 auto}
.brand-mark{
  width:42px;height:42px;border-radius:13px;flex:0 0 auto;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-300));
  box-shadow:0 0 0 1px rgba(111,227,245,.45),0 10px 26px -12px rgba(18,184,216,.75);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;font-weight:800;color:var(--text-1);letter-spacing:-.01em}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px;border-radius:10px;
  font-size:14.5px;color:var(--text-2);white-space:nowrap;transition:color .2s ease-out,background .2s ease-out;
}
.nav-link:hover{color:var(--text-1);background:var(--glass)}
.nav-link.active{color:var(--brand-300)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;
  background:var(--brand-500);box-shadow:0 0 10px rgba(18,184,216,.85);
}
.nav-right{display:flex;align-items:center;gap:12px}
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border:0;border-radius:var(--r-pill);cursor:pointer;
  font-size:15px;font-weight:700;color:#04121A;text-decoration:none;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  box-shadow:0 0 0 1px rgba(111,227,245,.45),0 10px 30px -8px rgba(18,184,216,.6);
  transition:transform .2s ease-out,box-shadow .2s ease-out,filter .2s ease-out;
}
.btn-glow:hover{transform:translateY(-2px);filter:brightness(1.07);color:#04121A;
  box-shadow:0 0 0 1px rgba(111,227,245,.6),0 16px 38px -10px rgba(18,184,216,.75)}
.btn-glow:active{transform:translateY(0);box-shadow:inset 0 3px 10px rgba(0,0,0,.35)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);cursor:pointer;
  font-size:15px;font-weight:600;color:var(--text-1);text-decoration:none;
  background:transparent;border:1px solid var(--line-strong);
  transition:border-color .2s ease-out,background .2s ease-out,transform .2s ease-out;
}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--glass-hi);color:#fff;transform:translateY(-2px)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;background:var(--glass);
  border:1px solid var(--line);color:var(--text-1);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle svg{width:22px;height:22px}
@media (max-width:991.98px){
  .nav-toggle{display:inline-flex}
  .nav-links{
    position:absolute;left:0;right:0;top:100%;display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:8px 16px 16px;background:rgba(8,14,26,.97);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line-strong);
  }
  .nav-links.is-open{display:flex}
  .nav-link{padding:14px 10px;font-size:15.5px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link:last-child{border-bottom:0}
  .nav-link.active::after{left:10px;right:auto;width:26px;bottom:8px}
  .nav-cta{display:none}
}

/* ============ 移动端底部 Tab ============ */
.mobile-tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;display:none;
  grid-template-columns:repeat(4,1fr);gap:2px;
  background:rgba(8,14,26,.94);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabbar a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  min-height:58px;padding:7px 2px;font-size:10.5px;color:var(--text-3);text-decoration:none;
}
.mobile-tabbar a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.mobile-tabbar a.active{color:var(--brand-300)}
.mobile-tabbar a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:28px;height:2px;border-radius:2px;background:var(--brand-500);box-shadow:0 0 10px rgba(18,184,216,.9);
}
@media (max-width:991.98px){
  .mobile-tabbar{display:grid}
  body{padding-bottom:84px}
}

/* ============ 面包屑 ============ */
.crumb-bar{padding:22px 0 6px}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-3)}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--brand-300)}
.crumb .sep{color:var(--text-3);opacity:.6}
.crumb .current{color:var(--text-2);max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文章头 ============ */
.article-head{padding:10px 0 34px}
.head-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  border:1px solid var(--line);background:var(--glass);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  padding:38px 38px 34px;
}
.head-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(620px 320px at 88% -10%,rgba(18,184,216,.20),transparent 66%),
             radial-gradient(520px 300px at 0% 110%,rgba(123,92,255,.16),transparent 68%);
  pointer-events:none;
}
.head-band > *{position:relative}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;
  color:var(--brand-300);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand-500)}
.head-band h1{
  font-size:clamp(28px,3.5vw,44px);line-height:1.22;font-weight:800;letter-spacing:-.02em;
  max-width:20em;margin-bottom:18px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.meta-row .dot{opacity:.5}
.badge-cat{
  display:inline-flex;align-items:center;padding:5px 13px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;color:var(--accent-300);
  background:rgba(123,92,255,.16);border:1px solid rgba(123,92,255,.34);
}
.badge-state{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;color:var(--brand-300);
  background:rgba(18,184,216,.14);border:1px solid rgba(18,184,216,.3);
}
.badge-state i{width:7px;height:7px;border-radius:50%;background:var(--warm-500);display:inline-block}
.article-cover{
  margin-top:26px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:21/8;background:var(--bg-1);
}
.article-cover img{width:100%;height:100%;object-fit:cover}
@media (max-width:767.98px){
  .head-band{padding:26px 20px 24px;border-radius:var(--r-card)}
  .article-cover{aspect-ratio:16/9}
  .crumb .current{max-width:70vw}
}

/* ============ 阅读区布局 ============ */
.article-wrap{
  display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:40px;align-items:start;
  padding:8px 0 72px;
}
@media (max-width:1199.98px){.article-wrap{grid-template-columns:minmax(0,1fr) 260px;gap:30px}}
@media (max-width:991.98px){.article-wrap{grid-template-columns:minmax(0,1fr);gap:22px}}

.toc-mobile{display:none}
@media (max-width:991.98px){
  .toc-mobile{display:block;margin-bottom:22px}
  .toc-mobile summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
    padding:14px 18px;border-radius:14px;background:var(--glass);border:1px solid var(--line);
    font-size:14.5px;font-weight:600;color:var(--text-1);
  }
  .toc-mobile summary::-webkit-details-marker{display:none}
  .toc-mobile summary span{color:var(--brand-300)}
  .toc-mobile[open] summary{margin-bottom:10px}
}
.toc-card{
  position:sticky;top:96px;border-radius:var(--r-card);border:1px solid var(--line);
  background:var(--glass);backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  padding:20px 18px;max-height:calc(100vh - 140px);overflow-y:auto;
}
.toc-card h2{
  font-size:13px;letter-spacing:.12em;color:var(--text-2);font-weight:700;
  padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line);
}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:9px 12px;border-radius:10px;font-size:13.5px;line-height:1.5;
  color:var(--text-2);border-left:2px solid transparent;transition:all .2s ease-out;
}
.toc-list a:hover{color:var(--text-1);background:var(--glass-hi)}
.toc-list a.is-active{color:var(--brand-300);background:rgba(18,184,216,.1);border-left-color:var(--brand-500)}
.toc-side-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:12.5px;color:var(--text-3);line-height:1.75}
.toc-side-note a{color:var(--brand-300)}

.panel{
  border-radius:var(--r-lg);border:1px solid var(--line);background:var(--bg-1);
  box-shadow:var(--shadow-1);padding:38px 42px;
}
@media (max-width:767.98px){.panel{padding:24px 18px}}

/* ============ 长文排版 ============ */
.prose{max-width:820px;font-size:16.5px;line-height:1.9;color:var(--text-1)}
.prose > *:first-child{margin-top:0}
.prose p{margin:0 0 1.25em}
.prose h2{
  position:relative;margin:44px 0 18px;padding-left:16px;
  font-size:clamp(21px,2.2vw,27px);line-height:1.35;font-weight:800;letter-spacing:-.01em;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.24em;width:4px;border-radius:4px;
  background:linear-gradient(180deg,var(--brand-500),var(--accent-500));
}
.prose h3{margin:32px 0 14px;font-size:20px;line-height:1.45;font-weight:700;color:#fff}
.prose h4{margin:24px 0 12px;font-size:17px;font-weight:700;color:var(--brand-300)}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.4em}
.prose li{margin-bottom:.55em}
.prose ul li::marker{color:var(--brand-500)}
.prose ol li::marker{color:var(--brand-300);font-weight:700;font-variant-numeric:tabular-nums}
.prose blockquote{
  margin:24px 0;padding:18px 22px;border-radius:14px;
  background:var(--glass);border-left:3px solid var(--brand-500);color:var(--text-2);
  font-style:normal;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:16px;margin:22px 0;border:1px solid var(--line)}
.prose figure{margin:22px 0}
.prose figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.prose a{color:var(--brand-300);border-bottom:2px solid rgba(18,184,216,.5);padding-bottom:1px}
.prose a:hover{color:#fff;border-bottom-color:#fff}
.prose table{
  width:100%;border-collapse:separate;border-spacing:0;margin:24px 0;font-size:15px;
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
}
.prose thead th{background:rgba(18,184,216,.1);color:var(--brand-300);font-weight:700;text-align:left}
.prose th,.prose td{padding:12px 16px;border-bottom:1px solid var(--line)}
.prose tbody tr:nth-child(even){background:rgba(255,255,255,.025)}
.prose tbody tr:last-child td{border-bottom:0}
.prose code{background:rgba(123,92,255,.16);color:var(--accent-300);padding:2px 7px;border-radius:6px;font-size:.92em}
.prose hr{border:0;border-top:1px solid var(--line);margin:36px 0}
@media (max-width:767.98px){
  .prose{font-size:16px;line-height:1.88}
  .panel{padding:22px 16px}
}

/* 空态 */
.empty-state{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;
  padding:52px 24px;border-radius:var(--r-card);border:1px dashed var(--line-strong);
  background:var(--glass);
}
.empty-state svg{width:42px;height:42px;stroke:var(--brand-300);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.empty-state h2{font-size:20px;font-weight:700}
.empty-state p{color:var(--text-2);margin:0;font-size:14.5px}

/* 文末标签与返回 */
.foot-tools{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  margin-top:40px;padding-top:26px;border-top:1px solid var(--line);
}
.tag-group{display:flex;flex-wrap:wrap;align-items:center;gap:9px}
.tag-group .label{font-size:13px;color:var(--text-3)}
.tag{
  display:inline-flex;padding:6px 14px;border-radius:var(--r-pill);font-size:13px;
  color:var(--text-2);background:var(--glass);border:1px solid var(--line);transition:all .2s ease-out;
}
.tag:hover{color:var(--brand-300);border-color:var(--line-strong);background:var(--glass-hi)}
.back-link{font-size:14px;color:var(--brand-300);display:inline-flex;align-items:center;gap:7px}
.back-link svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.back-link:hover{color:#fff}

/* ============ 相关推荐 ============ */
.related{padding:8px 0 84px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px}
.section-head .eyebrow{margin-bottom:10px}
.section-head h2{font-size:clamp(23px,2.5vw,32px);line-height:1.3;font-weight:800;letter-spacing:-.01em}
.section-head .more{font-size:14px;color:var(--brand-300);white-space:nowrap}
.section-head .more:hover{color:#fff}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
@media (max-width:1199.98px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:767.98px){.card-grid{grid-template-columns:1fr}}
.card-post{
  display:flex;flex-direction:column;height:100%;overflow:hidden;border-radius:var(--r-card);
  border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out;
}
.card-post:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-2)}
.card-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.card-post:hover .card-thumb img{transform:scale(1.03)}
.card-body{display:flex;flex-direction:column;gap:10px;padding:20px 22px 22px;flex:1}
.card-body h3{font-size:17.5px;font-weight:700;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body h3 a{color:var(--text-1)}
.card-body h3 a:hover{color:var(--brand-300)}
.card-body p{font-size:14px;line-height:1.75;color:var(--text-2);margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;
  padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3)}
.card-foot .read{color:var(--brand-300)}

/* ============ CTA 带 ============ */
.cta-band{padding:0 0 92px}
.cta-inner{
  position:relative;overflow:hidden;border-radius:var(--r-lg);padding:44px 44px;
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(18,184,216,.16),rgba(123,92,255,.14) 62%,rgba(18,184,216,.05));
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  box-shadow:var(--shadow-1);
}
.cta-inner h2{font-size:clamp(21px,2.3vw,29px);line-height:1.35;font-weight:800;margin-bottom:10px}
.cta-inner p{margin:0;color:var(--text-2);font-size:15px;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
@media (max-width:767.98px){.cta-inner{padding:28px 20px}.cta-band{padding-bottom:64px}}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--bg-1);padding:66px 0 0;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
@media (max-width:991.98px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:575.98px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand strong{font-size:16.5px;font-weight:800;color:var(--text-1)}
.footer-about{font-size:14px;color:var(--text-2);line-height:1.8;max-width:34ch;margin:0}
.footer-col h4{font-size:14.5px;font-weight:700;color:var(--text-1);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand-300)}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7}
.footer-contact svg{width:17px;height:17px;flex:0 0 auto;margin-top:4px;color:var(--brand-300)}
.footer-bottom{
  margin-top:52px;padding:20px 0 26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .5s ease-out,transform .5s ease-out}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --bg-0:#060A14;
  --bg-1:#0B1322;
  --bg-2:#101B2E;
  --brand-500:#12B8D8;
  --brand-600:#0E93AE;
  --brand-300:#6FE3F5;
  --accent-500:#7B5CFF;
  --accent-300:#A996FF;
  --warm-500:#FF9A3D;
  --text-1:#E9F2F8;
  --text-2:#9DB2C6;
  --text-3:#6B8199;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(111,227,245,.22);
  --glass:rgba(255,255,255,.045);
  --glass-hi:rgba(255,255,255,.08);
  --r-sm:8px;
  --r-btn:12px;
  --r-card:18px;
  --r-lg:24px;
  --shadow-1:0 20px 40px -28px rgba(0,0,0,.9);
  --shadow-2:0 26px 56px -26px rgba(0,0,0,.95);
  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--text-1);
  --bs-border-color:var(--line);
  --bs-primary-rgb:18,184,216;
  --bs-link-color:var(--brand-300);
  --bs-link-hover-color:#fff;
  --bs-border-radius:12px;
  --bs-border-radius-sm:8px;
  --bs-border-radius-lg:18px;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 12% -8%,rgba(18,184,216,.16),transparent 62%),
    radial-gradient(720px 460px at 92% 4%,rgba(123,92,255,.13),transparent 60%);
  z-index:0;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-300);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
a:hover{color:#fff;}
h1,h2,h3,h4,h5{margin:0;font-family:inherit;color:var(--text-1);letter-spacing:-.01em;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
::selection{background:rgba(18,184,216,.32);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:999px;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;}
@media (min-width:1400px){.container{max-width:1280px;}}
main{position:relative;z-index:1;}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1040;
  padding:14px 0;
  background:transparent;
  transition:background .24s ease,backdrop-filter .24s ease,border-color .24s ease,padding .24s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.86);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom-color:var(--line);
  padding:10px 0;
}
.nav-inner{display:flex;align-items:center;gap:24px;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;color:var(--text-1);}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(135deg,var(--brand-300),var(--brand-500) 55%,var(--accent-500));
  box-shadow:0 0 0 1px rgba(111,227,245,.35),0 10px 26px -12px rgba(18,184,216,.75);
}
.brand-mark svg{width:22px;height:22px;}
.brand-mark svg path,.brand-mark svg circle{stroke:#04121A;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  font-size:14.5px;
  color:var(--text-2);
  border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--text-1);background:var(--glass);}
.nav-link.active{color:var(--brand-300);}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500));
  box-shadow:0 0 12px rgba(18,184,216,.75);
}
.nav-right{display:flex;align-items:center;gap:10px;}
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;
  font-size:14.5px;font-weight:700;
  color:#04121A;
  border:0;border-radius:999px;
  background:linear-gradient(135deg,var(--brand-300),var(--brand-500) 45%,var(--brand-600));
  box-shadow:0 0 0 1px rgba(111,227,245,.45),0 10px 30px -8px rgba(18,184,216,.6);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
  cursor:pointer;
}
.btn-glow:hover{color:#04121A;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 0 1px rgba(111,227,245,.6),0 16px 38px -10px rgba(18,184,216,.8);}
.btn-glow:active{transform:translateY(0);box-shadow:inset 0 3px 10px rgba(4,18,26,.4);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;
  font-size:14.5px;font-weight:600;
  color:var(--text-1);
  background:transparent;
  border:1px solid var(--line-strong);
  border-radius:999px;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.btn-ghost:hover{color:var(--text-1);border-color:var(--brand-500);background:var(--glass-hi);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  color:var(--text-1);
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:12px;
  cursor:pointer;
}
.nav-toggle svg{width:22px;height:22px;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:150px 0 72px;
  min-height:44vh;
  background-image:linear-gradient(180deg,rgba(6,10,20,.84),rgba(6,10,20,.95)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:
    radial-gradient(680px 340px at 8% 6%,rgba(18,184,216,.2),transparent 62%),
    radial-gradient(560px 300px at 88% 22%,rgba(123,92,255,.16),transparent 60%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;}
.crumbs a{color:var(--text-3);}
.crumbs a:hover{color:var(--brand-300);}
.crumbs .sep{color:var(--text-3);opacity:.6;}
.crumbs .current{color:var(--text-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;
  color:var(--brand-300);
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand-500),var(--accent-500));}
h1.page-title{
  font-size:clamp(30px,4.2vw,52px);
  line-height:1.15;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:18px;
  max-width:20em;
}
.page-lead{
  max-width:760px;
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.trust-row{display:flex;flex-wrap:wrap;gap:22px;}
.trust-item{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text-2);}
.trust-item svg{width:18px;height:18px;color:var(--brand-300);flex:0 0 18px;}

/* ---------- sections ---------- */
.section{padding:96px 0;position:relative;}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{margin-bottom:40px;}
.sec-head h2{
  font-size:clamp(24px,2.6vw,36px);
  line-height:1.25;font-weight:700;
  letter-spacing:-.015em;
}
.sec-head p{margin-top:14px;max-width:720px;color:var(--text-2);font-size:15.5px;line-height:1.85;}
.sec-head.center{text-align:center;}
.sec-head.center p{margin-left:auto;margin-right:auto;}
.sec-head.center .eyebrow{justify-content:center;}

/* ---------- intro split ---------- */
.intro-grid{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start;}
.intro-side{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px;
  box-shadow:var(--shadow-1);
  backdrop-filter:blur(14px) saturate(120%);
}
.intro-side img{border-radius:16px;aspect-ratio:4/3;object-fit:cover;width:100%;margin-bottom:18px;}
.intro-side h3{font-size:19px;font-weight:700;margin-bottom:10px;line-height:1.45;}
.intro-side p{font-size:14.5px;color:var(--text-2);line-height:1.8;}
.intro-main p{font-size:16px;line-height:1.9;color:var(--text-1);}
.intro-main p.muted{color:var(--text-2);}
.tick-list{margin-top:22px;display:grid;gap:12px;}
.tick-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-1);}
.tick-list li svg{width:20px;height:20px;flex:0 0 20px;color:var(--brand-500);margin-top:4px;}
.tick-list li span{color:var(--text-2);}

/* ---------- key points ---------- */
.points-grid{display:grid;grid-template-columns:5fr 7fr;gap:24px;align-items:stretch;}
.feature-card{
  position:relative;
  display:flex;flex-direction:column;
  background:linear-gradient(160deg,rgba(18,184,216,.14),rgba(123,92,255,.1) 60%,rgba(255,255,255,.03));
  border:1px solid var(--line-strong);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--shadow-1);
  overflow:hidden;
}
.feature-card img{border-radius:16px;aspect-ratio:16/10;object-fit:cover;width:100%;margin-bottom:20px;}
.feature-card h3{font-size:21px;font-weight:700;line-height:1.45;margin-bottom:12px;}
.feature-card p{font-size:15px;color:var(--text-2);line-height:1.85;}
.metric-inline{
  margin-top:auto;
  padding-top:20px;
  display:flex;align-items:baseline;gap:10px;
  border-top:1px solid var(--line);
}
.metric-inline b{
  font-size:clamp(34px,4vw,46px);font-weight:800;line-height:1;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(120deg,var(--brand-300),var(--brand-500));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric-inline span{font-size:13.5px;color:var(--text-3);}
.points-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.point-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease;
}
.point-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-2);background:var(--glass-hi);}
.point-icon{
  width:40px;height:40px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(18,184,216,.14);
  border:1px solid rgba(18,184,216,.3);
  color:var(--brand-300);
  margin-bottom:16px;
}
.point-icon svg{width:20px;height:20px;}
.point-card h3{font-size:17.5px;font-weight:700;line-height:1.45;margin-bottom:10px;}
.point-card p{font-size:14.5px;color:var(--text-2);line-height:1.8;}

/* ---------- steps ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step;}
.step-item{
  position:relative;
  padding:26px 22px 24px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.step-item:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-2);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:12px;
  font-size:15px;font-weight:800;
  font-variant-numeric:tabular-nums;
  color:#04121A;
  background:linear-gradient(135deg,var(--brand-300),var(--brand-500));
  box-shadow:0 0 0 1px rgba(111,227,245,.4);
  margin-bottom:16px;
}
.step-item h3{font-size:17px;font-weight:700;margin-bottom:10px;line-height:1.45;}
.step-item p{font-size:14.5px;color:var(--text-2);line-height:1.8;}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:40px;align-items:start;}
.faq-layout .sec-head{margin-bottom:0;}
.accordion-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  margin-bottom:12px;
  backdrop-filter:blur(12px);
}
.accordion-item:last-child{margin-bottom:0;}
.accordion-button{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;
  font-size:16px;font-weight:600;line-height:1.6;
  color:var(--text-1);
  background:transparent;
  border:0;
  border-left:3px solid transparent;
  box-shadow:none;
  text-align:left;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.accordion-button:not(.collapsed){
  color:var(--brand-300);
  background:rgba(18,184,216,.07);
  border-left-color:var(--brand-500);
  box-shadow:none;
}
.accordion-button:hover{background:var(--glass-hi);}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--brand-500);outline-offset:-4px;}
.accordion-button::after{
  content:"+";
  flex:0 0 28px;
  width:28px;height:28px;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:18px;line-height:1;
  color:var(--brand-300);
  background-image:none;
  border:1px solid var(--line-strong);
  border-radius:8px;
  transform:none;
  transition:transform .22s ease,background .22s ease;
}
.accordion-button:not(.collapsed)::after{
  content:"−";
  background:rgba(18,184,216,.16);
  transform:rotate(180deg);
}
.accordion-body{
  padding:0 22px 22px;
  font-size:15px;
  line-height:1.9;
  color:var(--text-2);
}
.accordion-body strong{color:var(--text-1);font-weight:600;}

/* ---------- related ---------- */
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.rel-card{
  display:flex;gap:22px;align-items:center;
  padding:22px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-2);background:var(--glass-hi);}
.rel-thumb{flex:0 0 128px;width:128px;border-radius:14px;overflow:hidden;border:1px solid var(--line);}
.rel-thumb img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:transform .3s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.04);}
.rel-body h3{font-size:18px;font-weight:700;line-height:1.45;margin-bottom:8px;color:var(--text-1);}
.rel-card:hover .rel-body h3{color:var(--brand-300);}
.rel-body p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin-bottom:12px;}
.rel-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-300);}
.rel-more svg{width:16px;height:16px;transition:transform .2s ease;}
.rel-card:hover .rel-more svg{transform:translateX(4px);}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  padding:48px 44px;
  background:
    radial-gradient(620px 260px at 12% 0%,rgba(18,184,216,.24),transparent 62%),
    radial-gradient(520px 240px at 92% 100%,rgba(123,92,255,.2),transparent 60%),
    linear-gradient(180deg,var(--bg-2),var(--bg-1));
  box-shadow:var(--shadow-2);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:clamp(22px,2.4vw,32px);font-weight:700;line-height:1.3;margin-bottom:12px;}
.cta-band p{color:var(--text-2);font-size:15.5px;max-width:640px;line-height:1.85;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:0;
  padding:72px 0 32px;
  background:var(--bg-1);
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{width:36px;height:36px;flex:0 0 36px;border-radius:11px;}
.footer-brand strong{font-size:16px;font-weight:800;}
.footer-about{font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:34em;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text-1);}
.footer-col ul{display:grid;gap:11px;}
.footer-col a{font-size:14.5px;color:var(--text-2);}
.footer-col a:hover{color:var(--brand-300);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2);line-height:1.7;}
.footer-contact svg{width:18px;height:18px;flex:0 0 18px;color:var(--brand-300);margin-top:4px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13.5px;color:var(--text-3);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:1050;
  background:rgba(6,10,20,.94);
  backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab .tab-inner{display:flex;align-items:stretch;}
.tab-item{
  flex:1 1 0;
  position:relative;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:4px;
  min-height:58px;
  padding:8px 4px;
  font-size:10.5px;
  color:var(--text-3);
  transition:color .2s ease;
}
.tab-item svg{width:22px;height:22px;}
.tab-item.active{color:var(--brand-300);}
.tab-item.active::before{
  content:"";
  position:absolute;top:0;left:22%;right:22%;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500));
  box-shadow:0 0 10px rgba(18,184,216,.8);
}
.tab-item:hover{color:var(--text-1);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .intro-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .points-grid{grid-template-columns:1fr 1fr;}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  body{padding-bottom:80px;}
  .container{padding-left:16px;padding-right:16px;}
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:absolute;
    top:100%;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    margin-left:0;
    padding:8px;
    background:rgba(6,10,20,.97);
    backdrop-filter:blur(16px);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    display:none;
  }
  .nav-links.open{display:flex;}
  .nav-link{padding:15px 16px;font-size:15.5px;border-bottom:1px solid var(--line);border-radius:10px;}
  .nav-link:last-child{border-bottom:0;}
  .nav-link.active::after{left:16px;right:auto;width:26px;bottom:10px;}
  .nav-inner{gap:12px;justify-content:space-between;}
  .nav-right{margin-left:auto;}
  .nav-cta{display:none;}
  .page-hero{padding-top:118px;padding-bottom:56px;min-height:auto;}
  .section{padding:64px 0;}
  .mobile-tab{display:block;}
  .rel-grid{grid-template-columns:1fr;}
  .points-grid{grid-template-columns:1fr;}
  .points-cards{grid-template-columns:1fr 1fr;}
  .intro-grid{grid-template-columns:1fr;}
  .cta-band{padding:34px 24px;}
}
@media (max-width:767px){
  .brand-text em{display:none;}
  .brand-text strong{font-size:14.5px;}
  .points-cards{grid-template-columns:1fr;}
  .steps-grid{grid-template-columns:1fr;gap:16px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .rel-card{flex-direction:column;align-items:stretch;}
  .rel-thumb{flex:1 1 auto;width:100%;}
  .rel-thumb img{aspect-ratio:16/9;}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{flex:1 1 auto;}
  .cta-actions{width:100%;}
  .cta-actions .btn-glow,.cta-actions .btn-ghost{flex:1 1 auto;}
  h1.page-title{font-size:clamp(26px,7.6vw,34px);}
}
@media (max-width:575px){
  .page-hero{padding-top:104px;}
  .section{padding:56px 0;}
  .trust-row{gap:14px 18px;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --bg-0:#060A14;
  --bg-1:#0B1322;
  --bg-2:#101B2E;
  --brand-500:#12B8D8;
  --brand-600:#0E93AE;
  --brand-300:#6FE3F5;
  --accent-500:#7B5CFF;
  --accent-300:#A996FF;
  --warm-500:#FF9A3D;
  --text-1:#E9F2F8;
  --text-2:#9DB2C6;
  --text-3:#6B8199;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(111,227,245,.22);
  --glass:rgba(255,255,255,.045);
  --glass-hi:rgba(255,255,255,.08);
  --r-xs:8px;
  --r-sm:12px;
  --r-md:18px;
  --r-lg:24px;
  --shadow-1:0 20px 40px -28px rgba(0,0,0,.9);
  --shadow-2:0 26px 56px -26px rgba(0,0,0,.95);
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;

  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--text-1);
  --bs-border-color:var(--line);
  --bs-primary-rgb:18,184,216;
  --bs-link-color:var(--brand-300);
  --bs-link-hover-color:#fff;
  --bs-border-radius:var(--r-sm);
  --bs-border-radius-lg:var(--r-md);
  --bs-font-sans-serif:var(--font-cn);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--brand-300);text-decoration:none;transition:color .2s ease-out}
a:hover{color:#fff}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
button{font-family:inherit}
::selection{background:rgba(18,184,216,.3);color:#fff}
body::-webkit-scrollbar{width:10px}
body::-webkit-scrollbar-track{background:transparent}
body::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:999px}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){.container{max-width:1280px}}
@media (max-width:575.98px){.container{padding-left:16px;padding-right:16px}}

/* ---------- 通用文字 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.12em;color:var(--brand-300);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:linear-gradient(90deg,var(--brand-500),var(--accent-500));border-radius:2px}
.h1{font-size:clamp(30px,4.2vw,52px);line-height:1.15;font-weight:800;letter-spacing:-.02em}
.h2{font-size:clamp(24px,2.6vw,36px);line-height:1.25;font-weight:700}
.h3{font-size:20px;line-height:1.4;font-weight:700}
.lead{color:var(--text-2);font-size:16px;line-height:1.9}
.muted{color:var(--text-2);font-size:14px;line-height:1.75}
.tiny{color:var(--text-3);font-size:13px;line-height:1.7}
.tnum{font-variant-numeric:tabular-nums}
.section{padding:104px 0}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media (max-width:991.98px){.section{padding:72px 0}}
@media (max-width:575.98px){.section{padding:56px 0}}
.section-head{margin-bottom:38px;max-width:760px}
.section-head .h2{margin-bottom:12px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .22s ease-out,border-color .22s ease-out,backdrop-filter .22s ease-out;
}
.site-header.scrolled{
  background:rgba(6,10,20,.85);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-500),var(--accent-500));
  box-shadow:0 0 0 1px rgba(111,227,245,.35),0 10px 24px -12px rgba(18,184,216,.7);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{color:#fff;font-size:16px;font-weight:800;letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;color:var(--text-2);font-size:14.5px;font-weight:500;
  padding:9px 12px;border-radius:10px;white-space:nowrap;transition:color .18s ease-out,background .18s ease-out;
}
.nav-link:hover{color:#fff;background:var(--glass)}
.nav-link.active{color:var(--brand-300)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500));
  border-radius:2px;box-shadow:0 0 12px rgba(18,184,216,.8);
}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);background:var(--glass);color:var(--text-1);
}
.nav-toggle svg{width:22px;height:22px}

/* 按钮 */
.btn-glow,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:14.5px;font-weight:700;line-height:1;
  padding:13px 22px;border-radius:999px;border:1px solid transparent;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
  cursor:pointer;
}
.btn-glow{
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  color:#04121A;
  box-shadow:0 0 0 1px rgba(111,227,245,.45),0 10px 30px -8px rgba(18,184,216,.6);
}
.btn-glow:hover{transform:translateY(-2px);color:#04121A;box-shadow:0 0 0 1px rgba(111,227,245,.6),0 16px 38px -10px rgba(18,184,216,.75)}
.btn-glow:active{transform:translateY(0);box-shadow:inset 0 3px 10px rgba(0,0,0,.35)}
.btn-ghost{
  background:transparent;border-color:var(--line-strong);color:var(--text-1);
}
.btn-ghost:hover{background:var(--glass-hi);border-color:var(--brand-500);color:#fff;transform:translateY(-2px)}
.nav-cta{padding:11px 18px;font-size:14px}
@media (max-width:1199.98px){
  .nav-links{gap:2px}
  .nav-link{padding:9px 9px;font-size:14px}
}
@media (max-width:991.98px){
  body{padding-bottom:84px}
  .nav-inner{min-height:66px;gap:14px}
  .nav-toggle{display:grid;place-items:center}
  .nav-right .nav-cta{display:none}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    background:rgba(11,19,34,.97);
    backdrop-filter:blur(14px) saturate(120%);
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:8px 16px 16px;
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-link{
    padding:14px 8px;border-radius:0;font-size:15.5px;
    border-bottom:1px solid var(--line);
  }
  .nav-link:last-child{border-bottom:0}
  .nav-link.active::after{left:0;right:auto;width:3px;height:22px;top:50%;transform:translateY(-50%);bottom:auto}
}

/* 移动端底部 Tab */
.tab-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:1050;
  display:none;
  background:rgba(6,10,20,.94);
  backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.tab-bar ul{display:flex;align-items:stretch;height:62px}
.tab-bar li{flex:1 1 0;min-width:0}
.tab-bar a{
  position:relative;height:100%;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:3px;
  color:var(--text-3);font-size:10.5px;letter-spacing:.02em;
}
.tab-bar a svg{width:22px;height:22px}
.tab-bar a.active{color:var(--brand-300)}
.tab-bar a.active::before{
  content:"";position:absolute;top:0;left:22%;right:22%;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--accent-500));
  box-shadow:0 0 10px rgba(18,184,216,.9);
}
@media (max-width:991.98px){.tab-bar{display:block}}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:148px 0 84px;
  background:#08111F;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.5;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 12% 8%,rgba(18,184,216,.28),transparent 62%),
    radial-gradient(700px 380px at 88% 92%,rgba(123,92,255,.26),transparent 66%),
    linear-gradient(180deg,rgba(6,10,20,.72) 0%,rgba(6,10,20,.9) 62%,var(--bg-0) 100%);
}
.hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--brand-300)}
.crumb span.sep{color:rgba(255,255,255,.22)}
.crumb .current{color:var(--text-2)}
.hero h1{max-width:20ch}
.hero-sub{max-width:60ch;margin-top:18px;color:var(--text-2);font-size:clamp(15px,1.5vw,17px);line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:32px}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-2)}
.hero-points svg{width:18px;height:18px;color:var(--brand-300);flex:0 0 18px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;font-size:12.5px;
  background:rgba(123,92,255,.14);color:var(--accent-300);
  border:1px solid rgba(123,92,255,.28);margin-bottom:18px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--warm-500);display:block}
@media (max-width:767.98px){
  .hero{padding:120px 0 66px}
  .hero-bg{opacity:.38}
}

/* ---------- 卡片 / 玻璃面板 ---------- */
.glass{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
}
.card-hover{transition:transform .22s ease-out,box-shadow .22s ease-out,border-color .22s ease-out}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--line-strong)}

/* ---------- 交错图文 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split + .split{margin-top:72px}
.split-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.split-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .3s ease-out}
.split-media:hover img{transform:scale(1.03)}
.split-media .tag-float{
  position:absolute;left:16px;bottom:16px;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;font-size:12.5px;color:#fff;
  background:rgba(6,10,20,.72);border:1px solid var(--line-strong);
  backdrop-filter:blur(10px);
}
.split-body .h3{margin-bottom:14px;font-size:clamp(20px,2vw,26px)}
.split-body p{color:var(--text-2)}
.check-list{margin-top:18px;display:grid;gap:10px}
.check-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);line-height:1.75}
.check-list svg{width:18px;height:18px;flex:0 0 18px;color:var(--brand-500);margin-top:4px}
.split.reverse .split-media{order:2}
.split.reverse .split-body{order:1}
@media (max-width:991.98px){
  .split{grid-template-columns:1fr;gap:26px}
  .split + .split{margin-top:52px}
  .split.reverse .split-media,
  .split.reverse .split-body{order:0}
}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:8px}
.stat{padding:30px 26px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat .num{
  font-size:clamp(38px,4.4vw,54px);font-weight:800;line-height:1;letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(120deg,var(--brand-300),var(--accent-300));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat .num small{font-size:16px;font-weight:700;margin-left:4px}
.stat .label{font-size:15px;font-weight:700;margin-top:14px;color:var(--text-1)}
.stat .desc{font-size:13.5px;color:var(--text-3);margin-top:6px;line-height:1.7}
@media (max-width:767.98px){
  .stats{grid-template-columns:1fr}
  .stat{border-left:0;border-top:1px solid var(--line);padding:22px 0}
  .stat:first-child{border-top:0;padding-top:8px}
}

/* ---------- 步骤流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{
  position:relative;padding:26px 22px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out;
}
.step:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.step .idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;font-weight:800;font-size:16px;
  color:#04121A;background:linear-gradient(135deg,var(--brand-500),var(--brand-300));
  box-shadow:0 0 0 1px rgba(111,227,245,.4);
  font-variant-numeric:tabular-nums;
}
.step .h3{font-size:17px;margin:16px 0 8px}
.step p{font-size:14px;color:var(--text-2);margin:0}
.step::after{
  content:"";position:absolute;top:46px;right:-13px;width:14px;height:1px;
  background:linear-gradient(90deg,var(--line-strong),transparent);
}
.step:last-child::after{display:none}
@media (max-width:991.98px){
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
}
@media (max-width:575.98px){
  .steps{grid-template-columns:1fr;gap:0;counter-reset:step}
  .step{padding:0 0 0 26px;background:none;border:0;box-shadow:none;border-radius:0;padding-bottom:28px}
  .step:hover{transform:none}
  .step::before{
    content:"";position:absolute;left:5px;top:26px;bottom:0;width:1px;
    background:linear-gradient(180deg,var(--line-strong),transparent);
  }
  .step .idx{width:34px;height:34px;font-size:15px;border-radius:10px;position:relative;left:-26px;top:0;margin-bottom:-34px}
  .step .h3{margin-top:0}
  .step > *:not(.idx){padding-left:0}
}

/* ---------- 场景标签卡（非对称） ---------- */
.asym{display:grid;grid-template-columns:5fr 7fr;gap:24px}
.asym-card{padding:28px;border-radius:var(--r-md);background:var(--bg-2);border:1px solid var(--line);box-shadow:var(--shadow-1)}
.asym-card h3{margin-bottom:12px;font-size:20px}
.asym-card p{color:var(--text-2);font-size:14.5px;margin:0 0 14px}
.pill-row{display:flex;flex-wrap:wrap;gap:10px}
.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;border-radius:999px;font-size:13px;
  background:rgba(18,184,216,.12);color:var(--brand-300);
  border:1px solid rgba(18,184,216,.24);
}
.pill.purple{background:rgba(123,92,255,.14);color:var(--accent-300);border-color:rgba(123,92,255,.26)}
.mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:6px}
.mini{
  padding:18px;border-radius:var(--r-sm);background:var(--glass);
  border:1px solid var(--line);transition:border-color .2s ease-out,transform .2s ease-out;
}
.mini:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.mini strong{display:block;font-size:15px;margin-bottom:6px;color:var(--text-1)}
.mini span{font-size:13.5px;color:var(--text-3);line-height:1.7}
@media (max-width:991.98px){
  .asym{grid-template-columns:1fr}
  .mini-grid{grid-template-columns:1fr}
}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:44px;align-items:start}
.acc-item{border-bottom:1px solid var(--line)}
.acc-item:first-child{border-top:1px solid var(--line)}
.acc-btn{
  width:100%;display:flex;align-items:flex-start;gap:16px;
  padding:22px 0;background:none;border:0;text-align:left;color:var(--text-1);
  font-size:16.5px;font-weight:700;line-height:1.6;cursor:pointer;
  transition:color .2s ease-out;
}
.acc-btn:hover{color:var(--brand-300)}
.acc-btn .bar{width:3px;align-self:stretch;min-height:22px;border-radius:3px;background:linear-gradient(180deg,var(--brand-500),var(--accent-500));flex:0 0 3px;opacity:.45;transition:opacity .2s ease-out}
.acc-item.open .acc-btn .bar{opacity:1}
.acc-btn .txt{flex:1 1 auto}
.acc-btn .plus{
  position:relative;width:22px;height:22px;flex:0 0 22px;margin-top:3px;
}
.acc-btn .plus::before,.acc-btn .plus::after{
  content:"";position:absolute;background:var(--brand-300);border-radius:2px;
  transition:transform .22s ease-out,opacity .22s ease-out;
}
.acc-btn .plus::before{left:0;top:10px;width:22px;height:2px}
.acc-btn .plus::after{left:10px;top:0;width:2px;height:22px}
.acc-item.open .acc-btn .plus::after{transform:rotate(90deg);opacity:0}
.acc-panel{max-height:0;overflow:hidden;transition:max-height .26s ease-out}
.acc-panel-inner{
  padding:0 0 24px 19px;color:var(--text-2);font-size:15px;line-height:1.9;
}
.acc-item.open .acc-panel{max-height:420px}
.acc-item.open .acc-panel-inner{
  animation:fadeUp .26s ease-out both;
  background:linear-gradient(90deg,rgba(255,255,255,.045),transparent);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
}
@keyframes fadeUp{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media (max-width:991.98px){
  .faq-wrap{grid-template-columns:1fr;gap:22px}
  .acc-btn{font-size:15.5px;padding:18px 0}
}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  padding:52px 44px;
  background:linear-gradient(135deg,rgba(18,184,216,.16),rgba(123,92,255,.16));
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-1);
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,184,216,.35),transparent 68%);
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between}
.cta-inner .h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:8px}
.cta-inner p{color:var(--text-2);margin:0;max-width:56ch}
@media (max-width:767.98px){
  .cta-band{padding:32px 22px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}

/* ---------- 相关分类卡 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.rel-card{
  display:flex;gap:18px;align-items:flex-start;
  padding:24px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-1),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s ease-out,border-color .22s ease-out;
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.rel-card .ic{
  width:44px;height:44px;flex:0 0 44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(18,184,216,.12);border:1px solid rgba(18,184,216,.24);color:var(--brand-300);
}
.rel-card .ic svg{width:20px;height:20px}
.rel-card h3{font-size:17px;margin-bottom:6px;color:var(--text-1)}
.rel-card p{font-size:14px;color:var(--text-2);margin:0 0 10px}
.rel-card .more{font-size:13.5px;font-weight:700;color:var(--brand-300)}
@media (max-width:767.98px){.rel-grid{grid-template-columns:1fr}}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg-1);
  border-top:1px solid var(--line);
  padding:66px 0 26px;
  margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand strong{font-size:16.5px;color:#fff;font-weight:800}
.footer-about{color:var(--text-3);font-size:13.5px;line-height:1.85;max-width:34ch;margin:0}
.footer-col h4{font-size:14.5px;color:#fff;margin-bottom:16px;font-weight:700}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:var(--text-3);font-size:13.5px}
.footer-col a:hover{color:var(--brand-300)}
.footer-contact li{display:flex;gap:10px;color:var(--text-3);font-size:13.5px;line-height:1.7}
.footer-contact svg{width:17px;height:17px;flex:0 0 17px;margin-top:4px;color:var(--brand-500)}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  color:var(--text-3);font-size:12.5px;
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--brand-300)}
@media (max-width:991.98px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:575.98px){.footer-grid{grid-template-columns:1fr}}

/* ---------- 焦点与动效 ---------- */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;
}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --bg-0:#060A14;
  --bg-1:#0B1322;
  --bg-2:#101B2E;
  --brand-500:#12B8D8;
  --brand-600:#0E93AE;
  --brand-300:#6FE3F5;
  --accent-500:#7B5CFF;
  --accent-300:#A996FF;
  --warm-500:#FF9A3D;
  --text-1:#E9F2F8;
  --text-2:#9DB2C6;
  --text-3:#6B8199;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(111,227,245,.22);
  --glass:rgba(255,255,255,.045);
  --glass-hi:rgba(255,255,255,.08);
  --r-sm:8px;
  --r-btn:12px;
  --r-card:18px;
  --r-lg:24px;
  --shadow-card:0 20px 40px -28px rgba(0,0,0,.9);
  --shadow-card-hi:0 26px 56px -26px rgba(0,0,0,.95);
  --bs-body-bg:var(--bg-0);
  --bs-body-color:var(--text-1);
  --bs-border-color:var(--line);
  --bs-link-color:var(--brand-300);
  --bs-link-hover-color:#fff;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand-300);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:#fff;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text-1);}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
button{font:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(18,184,216,.3);color:#fff;}
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:999px;border:2px solid transparent;background-clip:padding-box;}
::-webkit-scrollbar-thumb:hover{background:rgba(111,227,245,.4);background-clip:padding-box;}

.container{width:100%;max-width:1200px;margin-inline:auto;padding-inline:24px;}
@media (min-width:1400px){.container{max-width:1280px;}}

/* ===== 按钮 ===== */
.btn-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:0;
  background:linear-gradient(135deg,var(--brand-500),var(--brand-600));
  color:#04121A;font-weight:700;font-size:15px;line-height:1;
  box-shadow:0 0 0 1px rgba(111,227,245,.45),0 10px 30px -8px rgba(18,184,216,.6);
  transition:transform .2s ease-out,box-shadow .2s ease-out,filter .2s ease-out;
  white-space:nowrap;
}
.btn-glow:hover{color:#04121A;transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 0 0 1px rgba(111,227,245,.6),0 16px 38px -10px rgba(18,184,216,.75);}
.btn-glow:active{transform:translateY(0);box-shadow:inset 0 2px 8px rgba(0,0,0,.3);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 21px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--line-strong);color:var(--text-1);
  font-weight:600;font-size:15px;line-height:1;
  transition:border-color .2s ease-out,background .2s ease-out,transform .2s ease-out;
}
.btn-ghost:hover{border-color:var(--brand-500);background:var(--glass-hi);color:#fff;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}

/* ===== 顶部导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:transparent;
  transition:background .24s ease-out,border-color .24s ease-out,box-shadow .24s ease-out;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.85);
  backdrop-filter:blur(12px) saturate(120%);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;min-height:74px;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-300),var(--brand-500) 55%,var(--accent-500));
  box-shadow:0 8px 22px -12px rgba(18,184,216,.9);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;font-weight:800;color:var(--text-1);letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;border-radius:10px;
  font-size:15px;color:var(--text-2);font-weight:500;
  transition:color .2s ease-out,background .2s ease-out;
}
.nav-link:hover{color:var(--text-1);background:var(--glass);}
.nav-link.active{color:var(--brand-300);font-weight:700;}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--brand-300));
  box-shadow:0 0 12px rgba(18,184,216,.8);
}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-cta{padding:11px 20px;font-size:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:var(--glass);border:1px solid var(--line);color:var(--text-1);
  place-items:center;
}
.nav-toggle svg{width:22px;height:22px;}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding-top:132px;padding-bottom:84px;}
.hero-sub{min-height:46vh;display:flex;align-items:center;}
.hero-media{position:absolute;inset:0;z-index:0;}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.42;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,20,.86) 0%,rgba(6,10,20,.92) 55%,rgba(6,10,20,.98) 100%);
}
.hero-glow{
  position:absolute;z-index:1;width:680px;height:680px;right:-160px;top:-220px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,184,216,.28) 0%,rgba(123,92,255,.16) 42%,rgba(6,10,20,0) 70%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;max-width:900px;}
.breadcrumb-line{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:20px;}
.breadcrumb-line a{color:var(--text-3);}
.breadcrumb-line a:hover{color:var(--brand-300);}
.breadcrumb-line .sep{color:rgba(255,255,255,.18);}
.breadcrumb-line .current{color:var(--text-2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.12em;color:var(--brand-300);
  padding:6px 14px;border-radius:999px;
  background:rgba(18,184,216,.1);border:1px solid rgba(111,227,245,.24);
  margin-bottom:20px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-300);box-shadow:0 0 10px var(--brand-300);}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.15;font-weight:800;letter-spacing:-.02em;margin-bottom:20px;}
.hero-sub-text{font-size:clamp(15px,1.6vw,18px);color:var(--text-2);line-height:1.85;max-width:640px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px;}
.hero-points{display:flex;flex-wrap:wrap;gap:12px 28px;}
.hero-points li{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text-2);}
.hero-points svg{width:18px;height:18px;color:var(--brand-300);flex:0 0 auto;}

/* ===== 板块通用 ===== */
.section{padding:96px 0;position:relative;}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.h2-line{display:block;width:40px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--brand-500),var(--accent-500));margin-bottom:16px;}
.section-head.center .h2-line{margin-left:auto;margin-right:auto;}
h2{font-size:clamp(24px,2.6vw,36px);line-height:1.25;font-weight:700;letter-spacing:-.01em;margin-bottom:16px;}
.section-head p{color:var(--text-2);font-size:16px;line-height:1.85;}
h3{font-size:19px;line-height:1.4;font-weight:700;}
.lead-note{font-size:14px;color:var(--text-3);line-height:1.7;}

/* ===== 准备要点：非对称 5/7 ===== */
.prep-grid{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:start;}
.prep-aside{
  padding:26px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.prep-aside p{color:var(--text-2);font-size:15px;}
.prep-aside figure{margin:18px 0 0;border-radius:var(--r-sm);overflow:hidden;}
.prep-aside img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-sm);}
.prep-list{display:grid;gap:16px;}
.prep-card{
  display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start;
  padding:22px 24px;border-radius:var(--r-card);
  background:var(--bg-2);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.prep-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-card-hi);}
.prep-num{
  font-size:15px;font-weight:800;color:var(--brand-300);
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(18,184,216,.1);border:1px solid rgba(111,227,245,.22);
}
.prep-card h3{margin-bottom:8px;font-size:18px;}
.prep-card p{font-size:14px;color:var(--text-2);line-height:1.75;}

/* ===== 时间轴 ===== */
.timeline{position:relative;margin-top:8px;}
.tl-item{position:relative;padding-left:78px;padding-bottom:36px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:22px;top:52px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--line-strong),rgba(255,255,255,.04));
}
.tl-item:last-child::before{display:none;}
.tl-node{
  position:absolute;left:0;top:0;width:46px;height:46px;border-radius:14px;
  display:grid;place-items:center;font-size:15px;font-weight:800;
  color:var(--brand-300);background:var(--bg-2);
  border:1px solid var(--line-strong);
  box-shadow:0 0 0 4px rgba(18,184,216,.06);
}
.tl-body{
  padding:22px 26px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:border-color .22s ease-out,transform .22s ease-out;
}
.tl-body:hover{border-color:var(--line-strong);transform:translateX(4px);}
.tl-body h3{margin-bottom:10px;}
.tl-body p{font-size:15px;color:var(--text-2);}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tag{
  display:inline-flex;align-items:center;font-size:13px;line-height:1;
  padding:6px 12px;border-radius:999px;
  background:rgba(123,92,255,.14);color:var(--accent-300);border:1px solid rgba(123,92,255,.26);
}
.tag-brand{background:rgba(18,184,216,.12);color:var(--brand-300);border-color:rgba(111,227,245,.24);}

/* ===== 数据条 ===== */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.metric{padding:8px 24px;border-left:1px solid var(--line);}
.metric:first-child{border-left:0;padding-left:0;}
.metric-num{
  font-size:clamp(34px,4vw,50px);font-weight:800;line-height:1.05;
  background:linear-gradient(135deg,var(--brand-300),var(--brand-500));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  display:flex;align-items:baseline;gap:6px;
}
.metric-num small{font-size:15px;font-weight:600;color:var(--text-2);-webkit-text-fill-color:var(--text-2);}
.metric p{font-size:14px;color:var(--text-2);margin-top:10px;line-height:1.7;}

/* ===== FAQ ===== */
.faq-wrap{max-width:900px;}
.faq-item{
  position:relative;margin-bottom:14px;border-radius:var(--r-card);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:border-color .2s ease-out,background .2s ease-out;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--brand-500),var(--accent-500));opacity:.65;
}
.faq-item[open]{background:var(--glass-hi);border-color:var(--line-strong);}
.faq-q{
  list-style:none;position:relative;cursor:pointer;
  padding:20px 58px 20px 28px;font-size:17px;font-weight:700;color:var(--text-1);
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q::after{
  content:"";position:absolute;right:26px;top:50%;width:14px;height:14px;margin-top:-7px;
  background:
    linear-gradient(var(--brand-300),var(--brand-300)) center/14px 2px no-repeat,
    linear-gradient(var(--brand-300),var(--brand-300)) center/2px 14px no-repeat;
  transition:transform .22s ease-out;
}
.faq-item[open] .faq-q::after{transform:rotate(45deg);}
.faq-a{padding:0 28px 22px;color:var(--text-2);font-size:15px;line-height:1.85;}

/* ===== 相关链接卡 ===== */
.link-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.link-card{
  display:flex;flex-direction:column;gap:14px;
  padding:26px;border-radius:var(--r-card);
  background:var(--bg-2);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
  color:var(--text-1);
}
.link-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-card-hi);color:var(--text-1);}
.link-card .badge-soft{
  display:inline-flex;align-self:flex-start;font-size:13px;line-height:1;
  padding:6px 12px;border-radius:999px;
  background:rgba(18,184,216,.12);color:var(--brand-300);border:1px solid rgba(111,227,245,.24);
}
.link-card h3{font-size:18px;}
.link-card p{font-size:14px;color:var(--text-2);line-height:1.75;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-300);margin-top:auto;}
.link-more svg{width:16px;height:16px;transition:transform .2s ease-out;}
.link-card:hover .link-more svg{transform:translateX(4px);}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  padding:52px 48px;
  background:linear-gradient(135deg,rgba(18,184,216,.14),rgba(123,92,255,.12) 60%,rgba(16,27,46,.9));
  border:1px solid var(--line-strong);
  display:grid;grid-template-columns:1.4fr .9fr;gap:32px;align-items:center;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px;}
.cta-band p{color:var(--text-2);font-size:15px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}

/* ===== 页脚 ===== */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:72px 0 0;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand strong{font-size:16px;font-weight:800;}
.footer-about{font-size:14px;color:var(--text-2);line-height:1.8;max-width:360px;}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:18px;color:var(--text-1);}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul a{font-size:14px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--brand-300);}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);line-height:1.7;}
.footer-contact svg{width:18px;height:18px;color:var(--brand-300);flex:0 0 auto;margin-top:4px;}
.footer-bottom{
  margin-top:56px;padding:22px 0 26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ===== 移动端底部 Tab ===== */
.mobile-tabs{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1100;
  background:rgba(11,19,34,.94);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tabs ul{display:flex;}
.mobile-tabs li{flex:1;}
.mobile-tabs a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  min-height:60px;padding:8px 4px;font-size:10.5px;color:var(--text-3);
}
.mobile-tabs a svg{width:22px;height:22px;stroke-width:1.7;fill:none;stroke:currentColor;}
.mobile-tabs a.active{color:var(--brand-300);}
.mobile-tabs a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;border-radius:2px;background:var(--brand-300);
  box-shadow:0 0 12px var(--brand-300);
}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .nav-links{
    position:absolute;top:74px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(11,19,34,.97);
    backdrop-filter:blur(18px) saturate(120%);
    -webkit-backdrop-filter:blur(18px) saturate(120%);
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    padding:8px 16px 14px;
    display:none;
  }
  .nav-links.open{display:flex;}
  .nav-link{padding:15px 8px;border-bottom:1px solid var(--line);font-size:16px;border-radius:0;}
  .nav-link:last-child{border-bottom:0;}
  .nav-link.active::after{display:none;}
  .nav-link.active{color:var(--brand-300);}
  .nav-toggle{display:grid;}
  .nav-cta{display:none;}
  .hero{padding-top:112px;padding-bottom:64px;}
  .hero-sub{min-height:auto;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:32px;}
  .prep-grid{grid-template-columns:1fr;gap:24px;}
  .link-cards{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:36px 26px;}
  .cta-actions{justify-content:flex-start;}
  .metrics{grid-template-columns:repeat(2,1fr);gap:26px 0;}
  .metric:nth-child(3){border-left:0;padding-left:0;}
  .mobile-tabs{display:block;}
  body{padding-bottom:82px;}
  .site-footer{padding-top:56px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
}
@media (max-width:575px){
  .container{padding-inline:16px;}
  .brand-text em{display:none;}
  .brand-text strong{font-size:15px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn-glow,.hero-actions .btn-ghost{flex:1 1 100%;}
  .hero-points{gap:10px 18px;}
  .metrics{grid-template-columns:1fr;}
  .metric{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:20px;}
  .metric:first-child{border-top:0;padding-top:0;}
  .tl-item{padding-left:0;padding-bottom:28px;}
  .tl-item::before{display:none;}
  .tl-node{position:static;margin-bottom:12px;width:42px;height:42px;}
  .tl-body{padding:18px;}
  .tl-body:hover{transform:none;}
  .faq-q{font-size:16px;padding:18px 52px 18px 22px;}
  .faq-a{padding:0 22px 18px;}
  .cta-band{padding:30px 20px;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease-out,transform .5s ease-out;}
.reveal.in{opacity:1;transform:none;}