/* roulang page: index */
:root{
  --ink-000:#04080F;
  --ink-100:#081422;
  --ink-200:#0E2035;
  --ink-300:#16324C;
  --brand:#1E63D6;
  --brand-deep:#0B2545;
  --cloud:#2FD3C0;
  --dawn:#FFB454;
  --t-1:#E8F1F8;
  --t-2:#A8BDD0;
  --t-3:#6E8499;
  --ok:#35C08A;
  --warn:#F0A93B;
  --err:#F0654E;
  --r-btn:10px;
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --sh-card:0 18px 48px rgba(0,0,0,.42);
  --sh-glass:0 20px 60px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --sh-glow:0 8px 28px rgba(47,211,192,.26), 0 0 0 1px rgba(47,211,192,.45);
  --s1:8px; --s2:16px; --s3:24px; --s4:32px; --s5:48px; --s6:64px; --s7:96px;
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter",-apple-system,"Segoe UI",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--t-2);
  background-color:var(--ink-000);
  background-image:
    radial-gradient(900px 520px at 6% -4%, rgba(47,211,192,.12), transparent 62%),
    radial-gradient(760px 480px at 98% 12%, rgba(255,180,84,.08), transparent 60%),
    linear-gradient(to bottom, rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(to right, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:auto,auto,100% 56px,56px 100%;
  background-attachment:fixed,fixed,scroll,scroll;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease,border-color .18s ease;}
a:hover{color:var(--cloud);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--t-1);font-weight:600;letter-spacing:.01em;}
h1{font-size:clamp(30px,4.6vw,54px);line-height:1.16;font-weight:600;}
h2{font-size:clamp(24px,3vw,36px);line-height:1.25;}
h3{font-size:20px;line-height:1.4;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--cloud);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(47,211,192,.28);color:var(--t-1);}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num,time,table td,table th{font-variant-numeric:tabular-nums;font-family:var(--font-num);}
.section{padding:104px 0;position:relative;}
.section--tight{padding:72px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px;flex-wrap:wrap;}
.section-head__main{max-width:660px;}
.section-head__kicker{display:inline-block;font-size:12.5px;letter-spacing:.14em;color:var(--cloud);margin-bottom:12px;}
.section-head p{margin:12px 0 0;color:var(--t-2);font-size:15.5px;line-height:1.8;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--brand);white-space:nowrap;}
.link-more span{transition:transform .18s ease;}
.link-more:hover span{transform:translateX(4px);}
.link-more:hover{color:var(--cloud);text-decoration:underline;text-underline-offset:4px;}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:rgba(4,8,15,.35);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,211,192,.32),transparent);
}
.site-header.is-scrolled{background:rgba(4,8,15,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);}
.nav{height:72px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;}
.nav__side{display:flex;align-items:center;gap:6px;}
.nav__side--right{justify-content:flex-end;}
.nav__link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 12px;
  font-size:15px;color:var(--t-2);border-radius:8px;transition:color .18s ease;
}
.nav__link::after{
  content:"";position:absolute;left:50%;bottom:6px;height:2px;width:0;border-radius:2px;
  background:var(--cloud);box-shadow:0 0 10px rgba(47,211,192,.8);
  transform:translateX(-50%);transition:width .18s ease;
}
.nav__link:hover{color:var(--t-1);}
.nav__link:hover::after{width:60%;}
.nav__link.is-active{color:var(--t-1);}
.nav__link.is-active::after{width:60%;}
.nav__brand{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:0 20px;line-height:1.1;text-align:center;
}
.nav__brand strong{font-size:18px;letter-spacing:.02em;color:var(--t-1);font-weight:600;}
.nav__brand em{font-style:normal;font-size:11px;letter-spacing:.18em;color:var(--t-3);margin-top:4px;}
.nav__brand:hover strong{color:var(--cloud);}
.nav__cta{margin-left:10px;}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:rgba(255,255,255,.04);border:1px solid rgba(120,200,220,.2);
  border-radius:10px;cursor:pointer;color:var(--t-1);
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-panel{
  position:fixed;top:60px;left:0;right:0;z-index:119;display:none;
  background:rgba(8,20,34,.97);border-bottom:1px solid var(--ink-300);
  padding:20px 24px 26px;box-shadow:0 24px 60px rgba(0,0,0,.5);
}
.mobile-panel.is-open{display:block;animation:fadeDown .22s ease;}
@keyframes fadeDown{from{opacity:0;transform:translateY(-8px);}to{opacity:1;transform:none;}}
.mobile-panel__grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px;}
.mobile-panel__grid a{
  display:block;padding:12px 0;font-size:15.5px;color:var(--t-2);border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-panel__grid a.is-active{color:var(--cloud);}
.mobile-panel .btn{margin-top:20px;width:100%;}
.mask{
  position:fixed;inset:0;background:rgba(4,8,15,.6);z-index:118;display:none;
}
.mask.is-open{display:block;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15.5px;font-weight:600;cursor:pointer;text-align:center;
  transition:transform .18s ease,box-shadow .2s ease,background .2s ease,color .18s ease,border-color .2s ease;
}
.btn--primary{
  background:linear-gradient(135deg,var(--cloud) 0%,var(--brand) 100%);
  color:#04080F;box-shadow:var(--sh-glow);
}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(47,211,192,.36),0 0 0 1px rgba(47,211,192,.6);color:#04080F;}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{
  background:transparent;border-color:rgba(47,211,192,.5);color:var(--cloud);
}
.btn--ghost:hover{background:rgba(47,211,192,.1);color:var(--cloud);transform:translateY(-2px);}
.btn--ghost:active{transform:translateY(0);}
.btn--text{background:none;border:none;color:var(--brand);padding:0 4px;min-height:auto;}
.btn--text:hover{color:var(--cloud);}
.btn--sm{min-height:36px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn--md{min-height:40px;padding:0 18px;font-size:14.5px;border-radius:9px;}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none;}
.btn.is-loading{color:transparent;position:relative;}
.btn.is-loading::after{
  content:"";position:absolute;width:16px;height:16px;border-radius:50%;
  border:2px solid rgba(4,8,15,.35);border-top-color:#04080F;animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg);}}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;line-height:1;letter-spacing:.02em;
}
.badge--cat{background:rgba(47,211,192,.12);color:var(--cloud);}
.badge--hot{background:var(--dawn);color:#241503;font-weight:600;}
.badge--soft{background:rgba(30,99,214,.16);color:#8fbcff;}

/* ---------- hero ---------- */
.hero{
  position:relative;min-height:620px;display:flex;align-items:center;
  padding:150px 0 96px;overflow:hidden;
  background-image:linear-gradient(rgba(4,8,15,.78),rgba(4,8,15,.78)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(720px 460px at 8% 4%,rgba(47,211,192,.16),transparent 62%);
  pointer-events:none;
}
.hero__grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;width:100%;}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  background:rgba(47,211,192,.12);color:var(--cloud);font-size:13px;margin-bottom:20px;
}
.hero h1{margin-bottom:18px;}
.hero__sub{font-size:17.5px;color:var(--t-2);max-width:560px;margin-bottom:28px;}
.stats{display:flex;align-items:stretch;gap:0;margin:0 0 32px;flex-wrap:wrap;}
.stat{padding:0 26px;border-left:1px solid rgba(255,255,255,.12);}
.stat:first-child{padding-left:0;border-left:none;}
.stat__num{font-size:28px;font-weight:600;color:var(--t-1);line-height:1.1;font-variant-numeric:tabular-nums;}
.stat__num i{font-style:normal;font-size:16px;color:var(--cloud);margin-left:2px;}
.stat__label{font-size:12.5px;color:var(--t-3);margin-top:6px;}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;}
.glass-card{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(120,200,220,.14);
  border-radius:var(--r-panel);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:var(--sh-glass);
  padding:20px;
}
.hero__card{aspect-ratio:4/5;display:flex;flex-direction:column;gap:16px;}
.hero__card .thumb{position:relative;flex:1;border-radius:var(--r-img);overflow:hidden;background:var(--ink-200);}
.hero__card .thumb img{width:100%;height:100%;object-fit:cover;}
.hero__card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(4,8,15,.85),transparent 55%);}
.hero__card ul{display:grid;gap:10px;}
.hero__card li{position:relative;padding-left:22px;font-size:14px;color:var(--t-2);}
.hero__card li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;
  background:var(--cloud);box-shadow:0 0 10px rgba(47,211,192,.7);
}

/* ---------- trust bar ---------- */
.trust{border-top:1px solid rgba(255,255,255,.07);border-bottom:1px solid rgba(255,255,255,.07);}
.trust__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;padding:36px 0;}
.trust__item{display:flex;gap:14px;align-items:flex-start;}
.trust__icon{
  flex:0 0 40px;width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:rgba(47,211,192,.1);color:var(--cloud);
}
.trust__icon svg{width:20px;height:20px;}
.trust__item h3{font-size:15.5px;margin-bottom:2px;}
.trust__item p{font-size:13.5px;color:var(--t-3);margin:0;line-height:1.7;}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;top:0;bottom:0;left:50%;width:1px;transform:translateX(-50%);
  background:linear-gradient(180deg,transparent,rgba(47,211,192,.75),rgba(47,211,192,.12),transparent);
}
.tl-item{position:relative;display:grid;grid-template-columns:5fr 2fr 5fr;align-items:center;margin-bottom:44px;}
.tl-item:last-child{margin-bottom:0;}
.tl-item .tl-node{grid-column:2;display:flex;justify-content:center;}
.tl-dot{
  width:14px;height:14px;border-radius:50%;background:var(--cloud);
  box-shadow:0 0 0 5px rgba(47,211,192,.14),0 0 18px rgba(47,211,192,.7);
}
.tl-card{
  grid-column:1;background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);
  padding:24px;position:relative;overflow:hidden;transition:transform .2s ease,border-color .2s ease;
}
.tl-card::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:var(--cloud);box-shadow:0 0 14px rgba(47,211,192,.7);
}
.tl-item:nth-child(odd) .tl-card{grid-column:3;}
.tl-card:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35);}
.tl-step{font-size:12.5px;color:var(--cloud);letter-spacing:.1em;margin-bottom:8px;display:block;}
.tl-card h3{margin-bottom:8px;font-size:18px;}
.tl-card p{margin:0;font-size:14.5px;color:var(--t-2);line-height:1.8;}
.tl-media{margin-top:16px;border-radius:var(--r-img);overflow:hidden;aspect-ratio:16/9;background:var(--ink-100);}
.tl-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.tl-card:hover .tl-media img{transform:scale(1.04);}

/* ---------- highlights ---------- */
.hl-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.hl-card{
  position:relative;background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);
  overflow:hidden;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.hl-card:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35);box-shadow:var(--sh-card);}
.hl-card__media{aspect-ratio:4/5;overflow:hidden;background:var(--ink-100);position:relative;}
.hl-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.hl-card:hover .hl-card__media img{transform:scale(1.05);}
.hl-card__media::after{
  content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(4,8,15,.92),rgba(4,8,15,.15) 55%,transparent);
}
.hl-card__body{padding:22px 24px 26px;}
.hl-card__body h3{font-size:19px;margin-bottom:8px;}
.hl-card__body p{margin:0;font-size:14.5px;color:var(--t-2);}
.hl-card--big{grid-column:span 4;}
.hl-card--wide{grid-column:span 6;display:grid;grid-template-columns:200px 1fr;align-items:center;}
.hl-card--wide .hl-card__media{aspect-ratio:4/5;height:100%;}
.hl-card--tall{grid-column:span 4;}
.hl-tagrow{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.hl-tag{font-size:12.5px;color:var(--t-3);border:1px solid var(--ink-300);border-radius:999px;padding:3px 10px;}

/* ---------- plans ---------- */
.plans-panel{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(120,200,220,.14);
  border-radius:var(--r-panel);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:var(--sh-glass);
  padding:12px;
}
.table-wrap{overflow-x:auto;position:relative;}
table.plans{width:100%;border-collapse:separate;border-spacing:0;min-width:820px;}
table.plans th,table.plans td{
  padding:20px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid rgba(255,255,255,.07);
  vertical-align:middle;
}
table.plans thead th{
  background:transparent;border-bottom:1px solid rgba(255,255,255,.12);position:relative;
}
table.plans tbody tr:last-child th,table.plans tbody tr:last-child td{border-bottom:none;}
table.plans tbody tr:hover td,table.plans tbody tr:hover th{background:rgba(255,255,255,.025);}
.plan-head{display:flex;flex-direction:column;gap:6px;}
.plan-head__name{font-size:15px;color:var(--t-1);font-weight:600;}
.plan-head__num{font-size:28px;font-weight:600;color:var(--t-1);line-height:1.1;font-variant-numeric:tabular-nums;}
.plan-head__num i{font-style:normal;font-size:14px;color:var(--t-3);margin-left:4px;}
.plan-head__desc{font-size:12.5px;color:var(--t-3);line-height:1.6;}
.plan-col--rec{background:rgba(255,180,84,.05);}
.plan-col--rec th,.plan-col--rec td{border-left:1px solid rgba(255,180,84,.45);border-right:1px solid rgba(255,180,84,.45);}
thead .plan-col--rec th:first-child{border-top:1px solid rgba(255,180,84,.45);border-radius:14px 14px 0 0;}
tbody .plan-col--rec:last-child{border-bottom:1px solid rgba(255,180,84,.45);border-radius:0 0 14px 14px;}
.plan-rec-badge{display:inline-flex;margin-top:4px;}
.cell-yes,.cell-no{display:inline-flex;align-items:center;gap:8px;font-size:14px;}
.cell-yes{color:var(--cloud);}
.cell-no{color:var(--t-3);}
.cell-yes svg,.cell-no svg{width:16px;height:16px;flex:0 0 16px;}
.plans-hint{display:none;font-size:13px;color:var(--t-3);padding:12px 6px 4px;text-align:right;}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  position:relative;display:flex;flex-direction:column;background:var(--ink-200);
  border:1px solid var(--ink-300);border-radius:var(--r-card);overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-card::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--cloud);
  box-shadow:0 0 14px rgba(47,211,192,.7);opacity:.9;z-index:2;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(47,211,192,.35);box-shadow:var(--sh-card);}
.news-card:hover .news-card__title a{color:var(--cloud);}
.news-card__media{aspect-ratio:16/9;overflow:hidden;background:var(--ink-100);}
.news-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.news-card:hover .news-card__media img{transform:scale(1.05);}
.news-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-card__title{font-size:17px;line-height:1.5;margin:0;}
.news-card__title a{
  color:var(--t-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__desc{
  margin:0;font-size:14px;color:var(--t-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__foot{
  margin-top:auto;padding-top:14px;border-top:1px solid rgba(255,255,255,.06);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.news-card__foot time{font-size:13px;color:var(--t-3);}
.news-card__foot a{font-size:13.5px;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.news-card__foot a:hover{color:var(--cloud);}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 24px;background:var(--ink-100);border:1px dashed var(--ink-300);border-radius:var(--r-card);text-align:center;
}
.empty-state svg{width:36px;height:36px;color:var(--cloud);opacity:.8;}
.empty-state p{margin:0;font-size:15px;color:var(--t-2);}

/* ---------- faq ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.faq-aside{position:sticky;top:110px;}
.faq-aside p{font-size:15px;color:var(--t-2);}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);
  overflow:hidden;position:relative;transition:border-color .2s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:var(--cloud);opacity:0;transition:opacity .2s ease;
}
.faq-item.is-open{border-color:rgba(47,211,192,.35);}
.faq-item.is-open::before{opacity:1;}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 24px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:16px;color:var(--t-1);font-weight:600;
}
.faq-q:hover{color:var(--cloud);}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;color:var(--cloud);transition:transform .26s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;left:50%;top:50%;
}
.faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%);}
.faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease;}
.faq-a p{margin:0;padding:0 24px 20px;font-size:15px;color:var(--t-2);line-height:1.85;}

/* ---------- signup ---------- */
.signup-panel{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(120,200,220,.14);
  border-radius:var(--r-panel);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:var(--sh-glass);
  padding:48px;display:grid;grid-template-columns:7fr 5fr;gap:48px;
}
.signup-left h2{margin-bottom:16px;}
.signup-left p{font-size:15.5px;color:var(--t-2);}
.check-list{display:grid;gap:12px;margin:24px 0;}
.check-list li{position:relative;padding-left:28px;font-size:15px;color:var(--t-2);}
.check-list li svg{position:absolute;left:0;top:5px;width:18px;height:18px;color:var(--cloud);}
.contact-lines{display:grid;gap:6px;font-size:14px;color:var(--t-3);}
.contact-lines strong{color:var(--t-2);font-weight:400;}
.form{display:grid;gap:16px;}
.form-row{display:grid;gap:8px;}
.form-row label{font-size:13.5px;color:var(--t-2);}
.input,select.input,textarea.input{
  width:100%;min-height:48px;padding:12px 16px;border-radius:10px;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);color:var(--t-1);
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
textarea.input{min-height:96px;resize:vertical;line-height:1.7;}
.input::placeholder{color:var(--t-3);}
.input:focus{
  outline:none;border-color:var(--cloud);box-shadow:0 0 0 2px rgba(47,211,192,.28);
  background:rgba(47,211,192,.05);
}
.input.is-error{border-color:var(--err);box-shadow:0 0 0 2px rgba(240,101,78,.22);}
.input.is-success{border-color:var(--ok);box-shadow:0 0 0 2px rgba(53,192,138,.2);}
.input[disabled]{opacity:.45;cursor:not-allowed;}
.form-err{font-size:13px;color:var(--err);display:none;}
.form-err.is-show{display:block;}
.form-check{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--t-3);}
.form-check input{width:18px;height:18px;margin-top:3px;accent-color:var(--cloud);}
.form-actions{display:flex;justify-content:flex-end;}
.form-actions .btn{width:200px;}
.form-note{
  border-left:4px solid var(--cloud);background:rgba(47,211,192,.08);color:var(--t-2);
  padding:12px 16px;border-radius:8px;font-size:14px;
}
.form-note--err{border-left-color:var(--err);background:rgba(240,101,78,.1);}

/* ---------- footer ---------- */
.site-footer{
  position:relative;background:var(--brand-deep);
  border-top:1px solid rgba(47,211,192,.28);
  padding:72px 0 0;margin-top:0;overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(560px 320px at 4% 0%,rgba(47,211,192,.12),transparent 62%),
    radial-gradient(520px 300px at 96% 100%,rgba(255,180,84,.08),transparent 60%);
  pointer-events:none;
}
.footer-grid{position:relative;display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:56px;}
.footer-brand strong{display:block;font-size:18px;color:var(--t-1);margin-bottom:12px;}
.footer-brand p{font-size:14px;color:var(--t-2);line-height:1.8;max-width:300px;margin:0;}
.footer-col h4{font-size:15px;color:var(--t-1);margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,.footer-col li{font-size:14px;color:var(--t-2);}
.footer-col a:hover{color:var(--cloud);}
.footer-contact li{display:flex;gap:8px;font-size:14px;color:var(--t-2);}
.footer-contact span{color:var(--t-3);flex:0 0 auto;}
.footer-bottom{
  position:relative;border-top:1px solid rgba(255,255,255,.06);
  padding:20px 0;text-align:center;font-size:13px;color:var(--t-3);
}
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  display:none;align-items:center;justify-content:center;z-index:110;
  background:rgba(8,20,34,.9);border:1px solid rgba(47,211,192,.5);color:var(--cloud);cursor:pointer;
  transition:transform .18s ease,background .18s ease;
}
.to-top.is-show{display:flex;}
.to-top:hover{transform:translateY(-3px);background:rgba(47,211,192,.14);}
.to-top svg{width:18px;height:18px;}

/* ---------- skeleton / img error ---------- */
.media-skel{background:var(--ink-200);position:relative;overflow:hidden;}
.media-skel::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,transparent 20%,rgba(255,255,255,.06) 45%,transparent 70%);
  animation:sheen 1.6s infinite;
}
@keyframes sheen{from{transform:translateX(-100%);}to{transform:translateX(100%);}}
img.is-error{background:var(--ink-200);color:var(--t-3);font-size:13px;padding:12px;object-fit:contain;}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{padding:0 24px;}
}
@media (max-width:1024px){
  .section{padding:72px 0;}
  .nav{height:64px;}
  .nav__side .nav__link{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav__cta{display:none;}
  .site-header{background:rgba(4,8,15,.88);backdrop-filter:blur(14px);}
  .hero{padding:120px 0 72px;min-height:460px;}
  .hero__grid{grid-template-columns:1fr;gap:32px;}
  .hero__card{display:none;}
  .trust__grid{grid-template-columns:1fr 1fr;gap:24px;}
  .tl-item{grid-template-columns:1fr;gap:0;margin-bottom:28px;padding-left:32px;}
  .timeline::before{left:6px;transform:none;}
  .tl-item .tl-node{grid-column:1;position:absolute;left:-32px;top:26px;justify-content:flex-start;}
  .tl-item:nth-child(odd) .tl-card,
  .tl-item .tl-card{grid-column:1;}
  .tl-dot{width:8px;height:8px;border-radius:2px;box-shadow:0 0 0 4px rgba(47,211,192,.14);}
  .hl-card--big,.hl-card--tall,.hl-card--wide{grid-column:span 6;}
  .hl-card--wide{grid-template-columns:1fr;}
  .hl-card--wide .hl-card__media{aspect-ratio:16/9;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .faq-aside{position:static;}
  .signup-panel{grid-template-columns:1fr;padding:32px;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .plans-hint{display:block;}
}
@media (max-width:768px){
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .stats{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch;}
  .stat{min-width:120px;}
  .trust__grid{grid-template-columns:1fr 1fr;gap:20px;}
  .hl-grid{grid-template-columns:1fr;}
  .hl-card--big,.hl-card--tall,.hl-card--wide{grid-column:span 1;}
  .hl-card__media{aspect-ratio:16/9;}
  .news-grid{grid-template-columns:1fr;}
  .form-actions{justify-content:stretch;}
  .form-actions .btn{width:100%;}
}
@media (max-width:480px){
  .container{padding:0 18px;}
  .hero{min-height:380px;padding:104px 0 56px;}
  .stat{padding:0 18px;}
  .stat__num{font-size:24px;}
  .btn{padding:0 18px;font-size:15px;}
  .signup-panel{padding:24px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .to-top{right:16px;bottom:16px;}
  .faq-q{font-size:15px;padding:14px 18px;}
  .faq-a p{padding:0 18px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink-000:#04080F;
  --ink-100:#081422;
  --ink-200:#0E2035;
  --ink-300:#16324C;
  --brand:#1E63D6;
  --brand-deep:#0B2545;
  --cloud:#2FD3C0;
  --dawn:#FFB454;
  --t-1:#E8F1F8;
  --t-2:#A8BDD0;
  --t-3:#6E8499;
  --ok:#35C08A;
  --warn:#F0A93B;
  --err:#F0654E;
  --r-btn:10px;
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 18px 48px rgba(0,0,0,.42);
  --sh-glass:0 20px 60px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --sh-glow:0 8px 28px rgba(47,211,192,.26), 0 0 0 1px rgba(47,211,192,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  min-height:100%;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t-2);
  background-color:var(--ink-000);
  background-image:
    radial-gradient(900px 520px at 6% -8%, rgba(47,211,192,.12), transparent 62%),
    radial-gradient(780px 520px at 98% 10%, rgba(255,180,84,.08), transparent 60%),
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  background-attachment:fixed,fixed,scroll,scroll;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--t-1);font-weight:600;letter-spacing:.01em}
p{margin:0}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--cloud)}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--cloud);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ============ 阅读进度条 ============ */
.progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:120;background:rgba(255,255,255,.06)}
.progress__bar{height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cloud),var(--dawn));
  box-shadow:0 0 12px rgba(47,211,192,.5);transition:transform .1s linear}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  min-height:44px;white-space:nowrap}
.btn--md{height:40px;padding:0 18px;font-size:15px}
.btn--lg{height:48px;padding:0 24px;font-size:16px}
.btn--primary{background:linear-gradient(135deg,var(--cloud),var(--brand));color:#04080F;box-shadow:var(--sh-glow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(47,211,192,.36),0 0 0 1px rgba(47,211,192,.55);color:#04080F}
.btn--primary:active{transform:translateY(0);box-shadow:0 4px 16px rgba(47,211,192,.24)}
.btn--ghost{background:transparent;border-color:rgba(47,211,192,.5);color:var(--cloud)}
.btn--ghost:hover{background:rgba(47,211,192,.1);color:var(--cloud);transform:translateY(-2px)}
.btn--quiet{background:rgba(255,255,255,.04);border-color:var(--ink-300);color:var(--t-1)}
.btn--quiet:hover{border-color:rgba(47,211,192,.4);color:var(--cloud)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;box-shadow:none;transform:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14px;color:var(--brand)}
.link-arrow::after{content:"→";transition:transform .18s var(--ease)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ============ 徽章 ============ */
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;letter-spacing:.03em;
  background:rgba(47,211,192,.12);color:var(--cloud);border:1px solid rgba(47,211,192,.22)}
.badge--dawn{background:rgba(255,180,84,.16);color:var(--dawn);border-color:rgba(255,180,84,.3)}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--t-2);background:rgba(255,255,255,.04);border:1px solid var(--ink-300);
  transition:color .18s var(--ease),border-color .18s var(--ease)}
.tag:hover{color:var(--cloud);border-color:rgba(47,211,192,.4)}

/* ============ 头部导航 ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(4,8,15,.35);border-bottom:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(47,211,192,0),rgba(47,211,192,.35),rgba(47,211,192,0)) 1;
  transition:background .24s var(--ease),backdrop-filter .24s var(--ease),box-shadow .24s var(--ease)}
.site-header.is-scrolled{background:rgba(4,8,15,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 12px 32px rgba(0,0,0,.45)}
.nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:var(--nav-h);column-gap:24px}
.nav__side{display:flex;align-items:center;gap:4px}
.nav__side--left{justify-self:start}
.nav__side--right{justify-self:end}
.nav__link{position:relative;display:inline-flex;align-items:center;min-height:44px;padding:0 12px;
  font-size:15px;color:var(--t-2);border-radius:8px;transition:color .18s var(--ease)}
.nav__link::after{content:"";position:absolute;left:50%;bottom:8px;width:0;height:2px;border-radius:2px;
  background:var(--cloud);box-shadow:0 0 10px rgba(47,211,192,.75);transform:translateX(-50%);
  transition:width .18s var(--ease)}
.nav__link:hover{color:var(--t-1)}
.nav__link:hover::after{width:60%}
.nav__link.is-active{color:var(--t-1)}
.nav__link.is-active::after{width:60%}
.nav__brand{justify-self:center;display:flex;flex-direction:column;align-items:center;line-height:1.15;text-align:center}
.nav__brand strong{font-size:18px;font-weight:600;color:var(--t-1);letter-spacing:.02em;white-space:nowrap}
.nav__brand em{font-style:normal;font-size:11px;letter-spacing:.24em;color:var(--cloud);opacity:.85;margin-top:3px}
.nav__cta{margin-left:8px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--ink-300);
  align-items:center;justify-content:center;background:rgba(255,255,255,.03)}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  display:block;width:18px;height:2px;border-radius:2px;background:var(--t-1);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle span{position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav.is-open .nav-toggle span{background:transparent}
.nav.is-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg)}
.nav.is-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg)}

/* ============ 页面主体 ============ */
main{position:relative;z-index:1;padding-top:var(--nav-h)}
.page-head{position:relative;padding:48px 0 8px;overflow:hidden}
.page-head::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(4,8,15,.55),rgba(4,8,15,.94)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;opacity:.5;pointer-events:none}
.page-head>*{position:relative}

.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--t-3)}
.crumbs a{color:var(--t-3)}
.crumbs a:hover{color:var(--cloud)}
.crumbs__sep{color:var(--ink-300)}
.crumbs__now{color:var(--t-3);max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.post-head{margin-top:16px;max-width:860px}
.post-head h1{font-size:clamp(26px,3.6vw,42px);line-height:1.22;margin:16px 0 0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-lead{margin-top:16px;font-size:18px;line-height:1.8;color:var(--t-2);max-width:720px}
.post-meta{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:28px;
  padding:18px 22px;border:1px solid var(--ink-300);border-radius:var(--r-card);background:rgba(255,255,255,.03)}
.post-meta__item{min-width:0}
.post-meta__item span{display:block;font-size:12px;letter-spacing:.08em;color:var(--t-3)}
.post-meta__item strong{display:block;margin-top:4px;font-size:14px;font-weight:600;color:var(--t-1);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.post-cover{margin-top:32px;position:relative;border-radius:var(--r-card);overflow:hidden;background:var(--ink-200)}
.post-cover__inner{position:relative;aspect-ratio:16/9;overflow:hidden}
.post-cover img{width:100%;height:100%;object-fit:cover}
.post-cover::after{content:"";position:absolute;left:0;right:0;bottom:0;height:60px;
  background:linear-gradient(180deg,transparent,var(--ink-000));pointer-events:none}
.skeleton{position:absolute;inset:0;background:var(--ink-200);
  background-image:linear-gradient(100deg,rgba(255,255,255,0) 20%,rgba(255,255,255,.07) 45%,rgba(255,255,255,0) 70%);
  background-size:220% 100%;animation:sheen 1.6s infinite linear}
@keyframes sheen{from{background-position:120% 0}to{background-position:-120% 0}}

/* ============ 文章布局 ============ */
.post-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;
  padding:56px 0 96px;align-items:start}
.post-main{min-width:0;max-width:760px}
.post-body{font-size:17px;line-height:1.9;color:var(--t-2)}
.post-body>*+*{margin-top:1.2em}
.post-body p{margin:0}
.post-body h2{position:relative;margin-top:2.2em;margin-bottom:.9em;font-size:clamp(22px,2.4vw,28px);
  line-height:1.35;padding-left:16px;border-left:4px solid var(--cloud);border-radius:2px}
.post-body h3{margin-top:1.6em;margin-bottom:.7em;font-size:20px;line-height:1.4}
.post-body h4{margin-top:1.4em;font-size:17px;color:var(--t-1)}
.post-body ul,.post-body ol{margin:1.1em 0;padding-left:4px}
.post-body ul li{position:relative;padding-left:20px;margin:.45em 0}
.post-body ul li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:2px;
  background:var(--cloud);box-shadow:0 0 8px rgba(47,211,192,.6)}
.post-body ol{counter-reset:li}
.post-body ol li{position:relative;padding-left:28px;margin:.5em 0;counter-increment:li}
.post-body ol li::before{content:counter(li);position:absolute;left:0;top:.25em;
  width:20px;height:20px;border-radius:50%;font-size:12px;line-height:20px;text-align:center;
  color:var(--cloud);border:1px solid rgba(47,211,192,.45);background:rgba(47,211,192,.08)}
.post-body blockquote{margin:1.6em 0;padding:20px 24px;border-left:3px solid var(--cloud);
  border-radius:0 var(--r-img) var(--r-img) 0;background:rgba(255,255,255,.04);color:var(--t-1)}
.post-body blockquote p{margin:0}
.post-body a{color:var(--brand);text-decoration:underline;text-decoration-color:rgba(30,99,214,.4);
  text-underline-offset:3px;transition:color .18s var(--ease),text-decoration-color .18s var(--ease)}
.post-body a:hover{color:var(--cloud);text-decoration-color:rgba(47,211,192,.6)}
.post-body strong{color:var(--t-1);font-weight:600}
.post-body img{border-radius:var(--r-img);margin:1.6em auto 0;height:auto}
.post-body figure{margin:1.8em 0}
.post-body figure img{margin:0}
.post-body figcaption{margin-top:10px;font-size:13px;line-height:1.7;color:var(--t-3);text-align:center}
.post-body hr{border:0;height:1px;margin:2.4em 0;background:linear-gradient(90deg,rgba(47,211,192,0),rgba(47,211,192,.35),rgba(47,211,192,0))}
.post-body table{width:100%;display:block;overflow-x:auto;border-collapse:collapse;margin:1.6em 0;
  font-size:15px;border:1px solid var(--ink-300);border-radius:var(--r-img)}
.post-body thead th{background:var(--ink-300);color:var(--t-1);font-weight:600;text-align:left}
.post-body th,.post-body td{padding:12px 16px;border-bottom:1px solid var(--ink-300);white-space:nowrap}
.post-body tbody tr:last-child td{border-bottom:0}
.post-body tbody tr:hover{background:rgba(47,211,192,.05)}
.post-body pre{margin:1.6em 0;padding:18px 20px;border-radius:var(--r-img);overflow-x:auto;
  background:var(--ink-100);border:1px solid var(--ink-300);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;line-height:1.7;color:var(--t-1)}
.post-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em;
  padding:2px 6px;border-radius:6px;background:rgba(255,255,255,.06);color:var(--cloud)}
.post-body pre code{padding:0;background:none;color:inherit}

.post-empty{margin-top:32px;padding:48px 32px;text-align:center;border:1px solid var(--ink-300);
  border-radius:var(--r-panel);background:var(--ink-100)}
.post-empty h2{font-size:22px}
.post-empty p{margin:12px auto 24px;max-width:520px;font-size:15px;color:var(--t-2)}

/* ============ 侧栏 ============ */
.post-aside{position:relative}
.aside-card{position:sticky;top:calc(var(--nav-h) + 24px);
  padding:22px;border-radius:var(--r-panel);border:1px solid rgba(120,200,220,.14);
  background:rgba(255,255,255,.045);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:var(--sh-glass)}
.aside-card+.aside-card{margin-top:20px}
.aside-card h3{font-size:14px;letter-spacing:.1em;color:var(--t-3);font-weight:600}
.toc{margin-top:14px;display:flex;flex-direction:column;gap:2px;max-height:52vh;overflow-y:auto}
.toc a{position:relative;display:block;padding:9px 10px 9px 14px;font-size:14px;line-height:1.55;
  color:var(--t-2);border-radius:8px;transition:color .18s var(--ease),background .18s var(--ease)}
.toc a::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:0;border-radius:2px;background:var(--cloud);transition:height .2s var(--ease)}
.toc a:hover{color:var(--t-1);background:rgba(255,255,255,.04)}
.toc a.is-current{color:var(--cloud);background:rgba(47,211,192,.08)}
.toc a.is-current::before{height:60%;box-shadow:0 0 10px rgba(47,211,192,.7)}
.toc--level3{padding-left:12px;font-size:13px;opacity:.86}
.author{display:flex;align-items:center;gap:14px;margin-top:14px}
.author__avatar{width:64px;height:64px;border-radius:50%;overflow:hidden;flex:0 0 64px;
  border:1px solid rgba(47,211,192,.35);background:var(--ink-200)}
.author__avatar img{width:100%;height:100%;object-fit:cover}
.author__name{font-size:15px;color:var(--t-1);font-weight:600}
.author__desc{margin-top:4px;font-size:13px;line-height:1.7;color:var(--t-3)}
.toc-strip{display:none}

/* ============ 文末 ============ */
.post-foot{margin-top:56px}
.post-tags{display:flex;flex-wrap:wrap;gap:10px}
.post-divider{height:1px;margin:32px 0;background:linear-gradient(90deg,rgba(47,211,192,0),rgba(47,211,192,.3),rgba(47,211,192,0))}
.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.news-card{position:relative;display:flex;flex-direction:column;border-radius:var(--r-card);
  background:var(--ink-200);border:1px solid var(--ink-300);overflow:hidden;
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease)}
.news-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--cloud);opacity:.75;box-shadow:0 0 14px rgba(47,211,192,.4)}
.news-card:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35);box-shadow:var(--sh-card)}
.news-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-200)}
.news-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.news-card:hover .news-card__media img{transform:scale(1.04)}
.news-card__body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card__title{font-size:17px;line-height:1.5;color:var(--t-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover .news-card__title{color:var(--cloud)}
.news-card__desc{font-size:14px;line-height:1.7;color:var(--t-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__meta{display:flex;align-items:center;justify-content:space-between;margin-top:auto;
  font-size:13px;color:var(--t-3)}
.related-empty{padding:32px;border:1px dashed var(--ink-300);border-radius:var(--r-panel);
  background:rgba(255,255,255,.02);text-align:center}
.related-empty p{font-size:15px;color:var(--t-2);margin-bottom:20px}
.related-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:20px}
.section-title h2{font-size:clamp(20px,2.2vw,26px)}

.to-top{position:fixed;right:24px;bottom:28px;width:48px;height:48px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;z-index:90;
  border:1px solid rgba(47,211,192,.5);background:rgba(8,20,34,.86);color:var(--cloud);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:rgba(47,211,192,.16);transform:translateY(-2px)}

/* ============ 页脚 ============ */
.site-footer{position:relative;z-index:1;margin-top:24px;background:var(--brand-deep);
  border-top:1px solid transparent;
  border-image:linear-gradient(90deg,rgba(47,211,192,0),rgba(47,211,192,.5),rgba(47,211,192,0)) 1}
.site-footer::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.07;
  background-image:radial-gradient(600px 220px at 12% 0%,rgba(47,211,192,.6),transparent 70%),
    repeating-linear-gradient(115deg,rgba(255,255,255,.5) 0 1px,transparent 1px 22px)}
.footer-grid{position:relative;display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 48px}
.footer-brand strong{display:block;font-size:18px;color:var(--t-1)}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.85;color:var(--t-2);max-width:340px}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:var(--t-1);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--t-2);min-height:22px;display:inline-block}
.footer-col a:hover{color:var(--cloud)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--t-2)}
.footer-contact span{color:var(--t-3);flex:0 0 62px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding:18px 0;text-align:center;
  font-size:13px;color:var(--t-3)}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .post-layout{gap:40px;grid-template-columns:minmax(0,1fr) 272px}
}
@media (max-width:1024px){
  :root{--nav-h:60px}
  .nav{display:grid;grid-template-columns:1fr auto;grid-template-areas:"brand toggle" "left left" "right right";
    height:var(--nav-h);row-gap:0}
  .nav__brand{grid-area:brand;justify-self:start;align-items:flex-start;text-align:left}
  .nav__brand strong{font-size:16px}
  .nav__brand em{font-size:10px;letter-spacing:.18em}
  .nav-toggle{grid-area:toggle;justify-self:end;display:inline-flex}
  .nav__side{display:none;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;
    padding:12px 0 16px;border-top:1px solid var(--ink-300)}
  .nav__side--left{grid-area:left}
  .nav__side--right{grid-area:right;border-top:0;padding-top:0}
  .nav.is-open .nav__side{display:grid}
  .nav.is-open{background:rgba(4,8,15,.96);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
  .nav.is-open .nav__side--right .nav__cta{grid-column:1 / -1;justify-content:center;margin:8px 0 0}
  .nav__link{justify-content:flex-start;padding:0 10px}
  .nav__link::after{left:10px;transform:none;bottom:4px}
  .nav__link:hover::after,.nav__link.is-active::after{width:34px}
  .nav-mask{position:fixed;inset:0;background:rgba(4,8,15,.6);opacity:0;visibility:hidden;
    transition:opacity .22s var(--ease),visibility .22s;z-index:99}
  .nav-mask.is-visible{opacity:1;visibility:visible}
  .post-layout{grid-template-columns:minmax(0,1fr);gap:32px;padding:40px 0 72px}
  .post-main{max-width:100%}
  .post-aside{order:-1}
  .aside-card{position:static;box-shadow:none}
  .aside-card--toc{display:none}
  .toc-strip{display:block;margin:28px 0 0;padding:16px 18px;border:1px solid var(--ink-300);
    border-radius:var(--r-card);background:rgba(255,255,255,.03)}
  .toc-strip summary{cursor:pointer;font-size:14px;color:var(--t-1);font-weight:600;min-height:24px;
    list-style:none;display:flex;align-items:center;justify-content:space-between}
  .toc-strip summary::-webkit-details-marker{display:none}
  .toc-strip summary::after{content:"+";color:var(--cloud);font-size:18px;line-height:1}
  .toc-strip[open] summary::after{content:"−"}
  .toc-strip .toc{margin-top:12px;max-height:none}
  .related{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 40px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .page-head{padding:32px 0 4px}
  .post-meta{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;padding:16px 18px}
  .post-layout{padding:32px 0 64px}
  .post-body{font-size:16px;line-height:1.88}
  .post-cover{margin-top:24px}
  .related{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-contact li{flex-direction:column;gap:2px}
  .footer-contact span{flex:none}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .nav__brand strong{font-size:15px}
  .nav__brand em{display:none}
  .post-head h1{font-size:26px}
  .post-lead{font-size:16px}
  .post-meta{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-empty{padding:36px 20px}
  .related-actions{flex-direction:column;align-items:stretch}
  .related-actions .btn{width:100%}
  .to-top{right:16px;bottom:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important}
}
html{scroll-behavior:smooth}

/* roulang page: category1 */
:root{
  --ink-000:#04080F;
  --ink-100:#081422;
  --ink-200:#0E2035;
  --ink-300:#16324C;
  --brand:#1E63D6;
  --brand-deep:#0B2545;
  --cloud:#2FD3C0;
  --dawn:#FFB454;
  --t-1:#E8F1F8;
  --t-2:#A8BDD0;
  --t-3:#6E8499;
  --ok:#35C08A;
  --warn:#F0A93B;
  --err:#F0654E;
  --r-btn:10px;
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 18px 48px rgba(0,0,0,.42);
  --sh-glass:0 20px 60px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --sh-glow:0 8px 28px rgba(47,211,192,.26), 0 0 0 1px rgba(47,211,192,.45);
  --dur:.18s;
  --font: "PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  --font-num: Inter,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-000);
  color:var(--t-1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.nav-locked{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color var(--dur) ease}
a:hover{color:var(--cloud)}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3{font-weight:600;letter-spacing:.01em}
:focus-visible{outline:2px solid var(--cloud);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.tnum{font-variant-numeric:tabular-nums}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-btn);
  font-weight:600;line-height:1;cursor:pointer;text-decoration:none;
  transition:transform var(--dur) ease, box-shadow var(--dur) ease, background var(--dur) ease, color var(--dur) ease, border-color var(--dur) ease;
  white-space:nowrap;
}
.btn--lg{height:48px;padding:0 24px;font-size:16px}
.btn--md{height:40px;padding:0 18px;font-size:14px}
.btn--sm{height:32px;padding:0 14px;font-size:13px}
.btn--primary{
  background:linear-gradient(135deg,var(--cloud) 0%,var(--brand) 100%);
  color:var(--ink-000);
  box-shadow:var(--sh-glow);
}
.btn--primary:hover{transform:translateY(-2px);color:var(--ink-000);box-shadow:0 12px 36px rgba(47,211,192,.36),0 0 0 1px rgba(47,211,192,.6)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{background:transparent;border-color:rgba(47,211,192,.5);color:var(--cloud)}
.btn--ghost:hover{background:rgba(47,211,192,.1);color:var(--cloud);transform:translateY(-2px)}
.btn--text{background:none;border:0;color:var(--brand);padding:0 4px;height:auto}
.btn--text::after{content:"→";margin-left:6px;transition:transform var(--dur) ease}
.btn--text:hover{color:var(--cloud)}
.btn--text:hover::after{transform:translateX(4px)}
.btn[disabled]{opacity:.4;box-shadow:none;cursor:not-allowed;transform:none}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(4,8,15,.35);
  transition:background .25s ease, backdrop-filter .25s ease, box-shadow .25s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent 0%,rgba(120,200,220,.28) 50%,transparent 100%);
}
.site-header.is-scrolled{background:rgba(4,8,15,.88);backdrop-filter:blur(14px);box-shadow:0 12px 34px rgba(0,0,0,.4)}
.nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;height:72px}
.nav__side{display:flex;align-items:center;gap:4px}
.nav__side--right{justify-content:flex-end;gap:8px}
.nav__link{
  position:relative;display:inline-flex;align-items:center;height:44px;padding:0 12px;
  font-size:15px;color:var(--t-2);border-radius:8px;
}
.nav__link::after{
  content:"";position:absolute;left:50%;bottom:8px;width:0;height:2px;transform:translateX(-50%);
  background:linear-gradient(90deg,rgba(47,211,192,0),var(--cloud),rgba(47,211,192,0));
  transition:width var(--dur) ease;
}
.nav__link:hover{color:var(--t-1)}
.nav__link:hover::after{width:60%}
.nav__link.is-active{color:var(--t-1)}
.nav__link.is-active::after{width:60%;box-shadow:0 0 12px rgba(47,211,192,.7)}
.nav__brand{display:flex;flex-direction:column;align-items:center;gap:2px;line-height:1.1;text-align:center}
.nav__brand strong{font-size:18px;font-weight:600;color:var(--t-1);letter-spacing:.02em}
.nav__brand em{font-style:normal;font-size:11px;letter-spacing:.22em;color:var(--t-3)}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--ink-300);border-radius:10px;background:rgba(255,255,255,.03);cursor:pointer;position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--t-1);transform:translateX(-50%);
  transition:transform .2s ease, opacity .2s ease;
}
.nav-toggle span{top:21px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{transform:rotate(45deg);top:0}
.nav-toggle.is-open span::after{transform:rotate(-45deg);top:0}
.nav-panel{display:none}

/* ============ 页头区 ============ */
.page-hero{position:relative;padding:56px 0 8px;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;top:-220px;left:-160px;width:640px;height:640px;pointer-events:none;
  background:radial-gradient(circle,rgba(47,211,192,.12) 0%,rgba(47,211,192,0) 68%);
}
.page-hero::after{
  content:"";position:absolute;bottom:-260px;right:-180px;width:560px;height:560px;pointer-events:none;
  background:radial-gradient(circle,rgba(255,180,84,.08) 0%,rgba(255,180,84,0) 70%);
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:18px}
.breadcrumb a{color:var(--t-3)}
.breadcrumb a:hover{color:var(--cloud)}
.breadcrumb span{color:var(--ink-300)}
.page-hero h1{font-size:clamp(28px,3.6vw,44px);line-height:1.2;letter-spacing:.01em;max-width:820px}
.page-hero__lead{margin-top:16px;max-width:720px;font-size:17px;color:var(--t-2)}
.hero-banner{
  position:relative;margin-top:32px;border-radius:var(--r-img);overflow:hidden;
  aspect-ratio:4/1;background:var(--ink-200);border:1px solid var(--ink-300);
}
.hero-banner img{width:100%;height:100%;object-fit:cover}
.hero-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,8,15,.15),rgba(4,8,15,.7))}

/* ============ 主体布局 ============ */
.layout{display:grid;grid-template-columns:3fr 9fr;gap:32px;padding:72px 0 8px;align-items:start}
.toc{
  position:sticky;top:96px;
  background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--sh-card);
}
.toc h2{font-size:13px;letter-spacing:.14em;color:var(--t-3);margin-bottom:14px;font-weight:600}
.toc ol{display:flex;flex-direction:column;gap:4px}
.toc a{
  display:block;padding:10px 12px 10px 14px;border-radius:8px;font-size:14px;
  color:var(--t-2);border-left:2px solid transparent;transition:all var(--dur) ease;
}
.toc a:hover{color:var(--t-1);background:rgba(255,255,255,.04)}
.toc a.is-current{color:var(--cloud);border-left-color:var(--cloud);background:rgba(47,211,192,.08)}
.toc ol{overflow:visible}

/* ============ 内容分区 ============ */
.content-col{min-width:0}
.section-block{scroll-margin-top:96px;padding-bottom:56px;border-bottom:1px solid rgba(22,50,76,.7);margin-bottom:56px}
.section-block:last-of-type{border-bottom:0}
.section-block h2{position:relative;padding-left:18px;font-size:clamp(22px,2.4vw,30px);line-height:1.3;margin-bottom:18px}
.section-block h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--cloud),rgba(47,211,192,.15));
}
.section-block h3{font-size:17px;color:var(--t-1);margin:24px 0 8px}
.section-block p{font-size:17px;color:var(--t-2);margin-bottom:16px}
.section-block p:last-child{margin-bottom:0}

.points{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:26px 0}
.points li{
  position:relative;padding:14px 16px 14px 44px;list-style:none;
  background:rgba(255,255,255,.03);border:1px solid var(--ink-300);border-radius:12px;
  font-size:15px;color:var(--t-2);line-height:1.7;
  transition:transform var(--dur) ease, border-color var(--dur) ease;
}
.points li::before{
  content:"";position:absolute;left:18px;top:21px;width:10px;height:10px;border-radius:3px;
  background:linear-gradient(135deg,var(--cloud),var(--brand));box-shadow:0 0 10px rgba(47,211,192,.5);
}
.points li:hover{transform:translateY(-2px);border-color:rgba(47,211,192,.35)}

.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:26px 0}
.stat-card{
  background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);
  padding:20px;transition:transform var(--dur) ease, border-color var(--dur) ease;
}
.stat-card:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35)}
.stat-card b{display:block;font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:28px;line-height:1.2;color:var(--cloud)}
.stat-card span{display:block;margin-top:8px;font-size:13px;color:var(--t-3);line-height:1.6}

.steps{display:flex;flex-direction:column;gap:12px;margin:26px 0;counter-reset:steps}
.steps li{
  position:relative;padding:18px 22px 18px 72px;
  background:var(--ink-200);border:1px solid var(--ink-300);border-left:3px solid var(--cloud);
  border-radius:var(--r-card);
  transition:transform var(--dur) ease, border-color var(--dur) ease, box-shadow var(--dur) ease;
}
.steps li:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35);box-shadow:var(--sh-card)}
.steps li::before{
  counter-increment:steps;content:counter(steps,decimal-leading-zero);
  position:absolute;left:22px;top:20px;font-family:var(--font-num);
  font-size:14px;font-weight:600;color:var(--cloud);font-variant-numeric:tabular-nums;
}
.steps strong{display:block;font-size:16px;color:var(--t-1);margin-bottom:4px;font-weight:600}
.steps span{font-size:15px;color:var(--t-2);line-height:1.75}

.split{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:center;margin:28px 0}
.split--rev .split__media{order:2}
.split--rev .split__text{order:1}
.split__text p{margin-bottom:14px}
.split__text p:last-child{margin-bottom:0}
.split__text ul{margin-top:16px}

.case-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:26px 0}
.case{
  position:relative;padding:20px 22px 20px 24px;background:var(--ink-200);
  border:1px solid var(--ink-300);border-radius:var(--r-card);
  transition:transform var(--dur) ease, border-color var(--dur) ease;
}
.case::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:0 3px 3px 0;
  background:var(--cloud);opacity:.8;
}
.case:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35)}
.case h3{font-size:16px;color:var(--t-1);margin:0 0 6px}
.case p{font-size:14.5px;color:var(--t-2);line-height:1.75;margin:0}

/* ============ 媒体与图片 ============ */
.media{
  position:relative;overflow:hidden;border-radius:var(--r-img);
  background:var(--ink-200);border:1px solid var(--ink-300);
  aspect-ratio:16/9;
}
.media img{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .45s ease}
.media img.is-loaded{opacity:1}
.media--skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(255,255,255,0) 20%,rgba(255,255,255,.05) 50%,rgba(255,255,255,0) 80%);
  background-size:220% 100%;animation:sweep 1.6s linear infinite;pointer-events:none;
}
@keyframes sweep{0%{background-position:120% 0}100%{background-position:-120% 0}}
.figure{margin:26px 0}
.figcaption{margin-top:12px;font-size:13px;color:var(--t-3);text-align:center;line-height:1.7}

/* ============ 玻璃面板与页尾入口 ============ */
.glass-panel{
  background:rgba(255,255,255,.045);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid rgba(120,200,220,.14);
  border-radius:var(--r-panel);
  box-shadow:var(--sh-glass);
}
.cta-inline{
  display:grid;grid-template-columns:7fr 5fr;gap:28px;align-items:center;
  padding:32px;margin:8px 0 56px;
}
.cta-inline h2{font-size:clamp(22px,2.4vw,28px);line-height:1.3;margin-bottom:12px}
.cta-inline p{font-size:15.5px;color:var(--t-2);line-height:1.8}
.cta-inline__action{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}

.entry-group{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  padding-top:32px;border-top:1px solid var(--ink-300);
}
.entry-group__label{font-size:13px;color:var(--t-3);margin-right:6px}

/* ============ FAQ（与全站共用） ============ */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);overflow:hidden;transition:border-color var(--dur) ease}
.faq-item.is-open{border-color:rgba(47,211,192,.4)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;
  min-height:56px;padding:12px 24px;background:none;border:0;text-align:left;
  font-size:16px;color:var(--t-1);cursor:pointer;
}
.faq-q i{
  flex:0 0 auto;width:20px;height:20px;position:relative;color:var(--cloud);
  transition:transform .26s ease;
}
.faq-q i::before,.faq-q i::after{content:"";position:absolute;background:currentColor;border-radius:2px}
.faq-q i::before{left:4px;right:4px;top:9px;height:2px}
.faq-q i::after{top:4px;bottom:4px;left:9px;width:2px}
.faq-item.is-open .faq-q i{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a p{padding:0 24px 20px;font-size:15px;color:var(--t-2);line-height:1.8}
.faq-item.is-open .faq-a{max-height:420px}

/* ============ 页脚 ============ */
.site-footer{position:relative;margin-top:104px;background:var(--brand-deep);overflow:hidden}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,211,192,.55),transparent);
}
.site-footer::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 88% 12%,rgba(47,211,192,.07) 0%,rgba(47,211,192,0) 45%),
    radial-gradient(circle at 6% 88%,rgba(255,180,84,.05) 0%,rgba(255,180,84,0) 45%);
}
.footer-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:48px;padding:72px 0 56px}
.footer-brand strong{display:block;font-size:19px;color:var(--t-1);margin-bottom:14px;letter-spacing:.02em}
.footer-brand p{font-size:14.5px;color:var(--t-2);line-height:1.85;max-width:340px}
.footer-col h4{font-size:14px;color:var(--t-1);margin-bottom:16px;letter-spacing:.06em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14.5px;color:var(--t-2)}
.footer-col a:hover{color:var(--cloud)}
.footer-contact li{font-size:14.5px;color:var(--t-2);display:flex;gap:10px;align-items:baseline}
.footer-contact span{color:var(--t-3);font-size:13px;flex:0 0 60px}
.footer-bottom{
  position:relative;z-index:1;border-top:1px solid rgba(255,255,255,.06);
  padding:20px 0;text-align:center;font-size:13px;color:var(--t-3);
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:90;
  width:48px;height:48px;border-radius:var(--r-pill);
  display:grid;place-items:center;cursor:pointer;
  background:rgba(4,8,15,.75);border:1px solid rgba(47,211,192,.5);color:var(--cloud);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:all .22s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:rgba(47,211,192,.14)}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .container{padding:0 24px}
  .nav{grid-template-columns:auto 1fr;height:60px}
  .nav__side--left{display:none}
  .nav__side--right .nav__link{display:none}
  .nav__brand{align-items:flex-start;text-align:left;justify-self:start}
  .nav__brand strong{font-size:16px}
  .nav__brand em{font-size:10px;letter-spacing:.16em}
  .nav-toggle{display:block}
  .nav-panel{
    display:block;position:absolute;top:100%;left:0;right:0;z-index:99;
    background:rgba(8,20,34,.98);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--ink-300);
    padding:16px 0 24px;box-shadow:0 24px 48px rgba(0,0,0,.5);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .2s ease, transform .2s ease, visibility .2s;
  }
  .nav-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-panel__grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .nav-panel__link{
    display:block;padding:12px 14px;border-radius:10px;font-size:15px;
    color:var(--t-2);background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);
  }
  .nav-panel__link.is-active{color:var(--cloud);border-color:rgba(47,211,192,.4);background:rgba(47,211,192,.08)}
  .nav-panel__cta{margin-top:16px;width:100%}
  .layout{grid-template-columns:1fr;gap:28px;padding-top:48px}
  .toc{position:static;padding:8px;border-radius:var(--r-card)}
  .toc h2{display:none}
  .toc ol{flex-direction:row;gap:8px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
  .toc ol::-webkit-scrollbar{display:none}
  .toc a{white-space:nowrap;border-left:0;border:1px solid var(--ink-300);border-radius:var(--r-pill);padding:8px 16px;font-size:14px}
  .toc a.is-current{background:rgba(47,211,192,.14);border-color:rgba(47,211,192,.5)}
  .section-block{padding-bottom:44px;margin-bottom:44px}
  .split{grid-template-columns:1fr}
  .split--rev .split__media{order:0}
  .split--rev .split__text{order:0}
  .cta-inline{grid-template-columns:1fr;gap:20px;padding:28px}
  .cta-inline__action{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:56px 0 44px}
  .footer-brand{grid-column:1 / -1}
  .footer-brand p{max-width:none}
  .site-footer{margin-top:80px}
}
@media (max-width:768px){
  .page-hero{padding-top:40px}
  .hero-banner{aspect-ratio:16/9}
  .points{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .section-block p{font-size:16px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .page-hero h1{font-size:26px}
  .page-hero__lead{font-size:15.5px}
  .btn--lg{height:46px;padding:0 18px;font-size:15px}
  .entry-group{flex-direction:column;align-items:stretch}
  .entry-group .btn{width:100%}
  .entry-group__label{margin-bottom:4px}
  .cta-inline__action .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .nav-panel__grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-000:#04080F;
  --ink-100:#081422;
  --ink-200:#0E2035;
  --ink-300:#16324C;
  --brand:#1E63D6;
  --brand-deep:#0B2545;
  --cloud:#2FD3C0;
  --dawn:#FFB454;
  --t-1:#E8F1F8;
  --t-2:#A8BDD0;
  --t-3:#6E8499;
  --ok:#35C08A;
  --warn:#F0A93B;
  --err:#F0654E;
  --line:rgba(120,200,220,.14);
  --line-soft:rgba(255,255,255,.08);
  --r-pill:999px;
  --r-btn:10px;
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --sh-card:0 18px 48px rgba(0,0,0,.42);
  --sh-glass:0 20px 60px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.06);
  --sh-glow:0 8px 28px rgba(47,211,192,.26), 0 0 0 1px rgba(47,211,192,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:72px;
  --sp-24:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--nav-h) + 84px);
}
body{
  margin:0;
  padding-top:var(--nav-h);
  background:var(--ink-000);
  color:var(--t-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.25;letter-spacing:.02em}
p{margin:0}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--cloud)}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
button{font:inherit}
:focus-visible{outline:2px solid var(--cloud);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--sp-24)}
.section{padding:104px 0;position:relative}
.section--tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3vw,36px);margin-bottom:14px}
.section-head p{color:var(--t-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--cloud);letter-spacing:.06em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--cloud);opacity:.8}
.divider{height:1px;border:0;margin:0;background:linear-gradient(90deg,transparent,rgba(120,200,220,.28),transparent)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-btn);
  font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn--lg{height:48px;padding:0 24px;font-size:16px}
.btn--md{height:40px;padding:0 18px;font-size:15px}
.btn--sm{height:32px;padding:0 14px;font-size:13px}
.btn--primary{
  background:linear-gradient(135deg,var(--cloud),var(--brand));
  color:#04080F;
  box-shadow:var(--sh-glow);
}
.btn--primary:hover{transform:translateY(-2px);color:#04080F;box-shadow:0 12px 34px rgba(47,211,192,.36),0 0 0 1px rgba(47,211,192,.6)}
.btn--primary:active{transform:translateY(0)}
.btn--primary[disabled],.btn--primary.is-disabled{opacity:.4;box-shadow:none;cursor:not-allowed;transform:none}
.btn--ghost{background:transparent;border-color:rgba(47,211,192,.5);color:var(--cloud)}
.btn--ghost:hover{background:rgba(47,211,192,.1);color:var(--cloud);transform:translateY(-2px)}
.btn--ghost:active{transform:translateY(0)}
.btn--ghost-light{background:transparent;border-color:rgba(255,255,255,.2);color:var(--t-1)}
.btn--ghost-light:hover{background:rgba(255,255,255,.08);color:var(--t-1)}
.btn--link{
  height:auto;padding:0;background:none;color:var(--brand);border:0;
  display:inline-flex;align-items:center;gap:6px;
  border-bottom:1px solid rgba(30,99,214,.4);
  border-radius:0;padding-bottom:2px;
}
.btn--link:hover{color:var(--cloud);border-bottom-color:rgba(47,211,192,.6)}
.btn--link .arrow{transition:transform .2s var(--ease)}
.btn--link:hover .arrow{transform:translateX(4px)}
.btn.is-loading{position:relative;color:transparent!important}
.btn.is-loading::after{
  content:"";position:absolute;width:16px;height:16px;border-radius:50%;
  border:2px solid rgba(4,8,15,.35);border-top-color:#04080F;
  animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12.5px;letter-spacing:.02em;
  background:rgba(47,211,192,.12);color:var(--cloud);
}
.badge--dawn{background:var(--dawn);color:#2A1704;font-weight:600}
.badge--outline{background:transparent;border:1px solid var(--ink-300);color:var(--t-2)}

/* 顶部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:var(--nav-h);
  background:rgba(4,8,15,.35);
  transition:background .28s var(--ease),backdrop-filter .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(120,200,220,.3),transparent);
  opacity:.7;
}
.site-header.is-scrolled{
  background:rgba(4,8,15,.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 12px 32px rgba(0,0,0,.4);
}
.nav{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:24px;height:var(--nav-h);
}
.nav__side{display:flex;align-items:center;gap:26px;min-width:0}
.nav__side--left{justify-content:flex-start}
.nav__side--right{justify-content:flex-end;gap:22px}
.nav__link{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 2px;font-size:15px;color:var(--t-2);
  transition:color .2s var(--ease);
}
.nav__link::after{
  content:"";position:absolute;left:50%;bottom:6px;height:2px;width:0;
  transform:translateX(-50%);
  background:linear-gradient(90deg,rgba(47,211,192,0),var(--cloud),rgba(47,211,192,0));
  box-shadow:0 0 10px rgba(47,211,192,.7);
  transition:width .18s var(--ease);
}
.nav__link:hover{color:var(--t-1)}
.nav__link:hover::after{width:60%}
.nav__link.is-active{color:var(--t-1)}
.nav__link.is-active::after{width:60%}
.nav__brand{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:0 10px;text-align:center;
}
.nav__brand strong{
  font-size:17px;font-weight:600;color:var(--t-1);letter-spacing:.03em;white-space:nowrap;
}
.nav__brand em{
  font-style:normal;font-size:11.5px;color:var(--t-3);letter-spacing:.16em;
}
.nav__brand:hover strong{color:var(--cloud)}
.nav__cta{margin-left:4px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);
  position:relative;cursor:pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;transform:translateX(-50%);
  width:18px;height:2px;border-radius:2px;background:var(--t-1);
  transition:transform .24s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:21px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg);top:0}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0}
.nav-panel{
  position:absolute;left:0;right:0;top:100%;display:none;
  background:rgba(8,20,34,.98);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  box-shadow:0 26px 60px rgba(0,0,0,.6);
  padding:18px 24px 22px;
}
.nav-panel.is-open{display:block}
.nav-panel__grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 12px;margin-bottom:16px}
.nav-panel__grid a{
  display:flex;align-items:center;min-height:44px;padding:0 14px;
  border-radius:var(--r-btn);color:var(--t-2);font-size:15px;
  background:rgba(255,255,255,.03);border:1px solid transparent;
}
.nav-panel__grid a:hover{color:var(--t-1);background:rgba(255,255,255,.06);border-color:var(--ink-300)}
.nav-panel__grid a.is-active{color:var(--cloud);border-color:rgba(47,211,192,.4);background:rgba(47,211,192,.08)}
.nav-panel__cta{width:100%}

/* 页头 */
.page-hero{position:relative;overflow:hidden;padding:56px 0 0;margin-bottom:0}
.page-hero__bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(620px 320px at 10% 0%, rgba(47,211,192,.14), transparent 70%),
    radial-gradient(520px 300px at 92% 100%, rgba(255,180,84,.09), transparent 72%),
    linear-gradient(180deg,rgba(4,8,15,.55),rgba(4,8,15,.95));
}
.page-hero__grid{
  position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(80% 70% at 50% 20%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(80% 70% at 50% 20%,#000 0%,transparent 78%);
}
.page-hero__cloud{position:absolute;right:0;top:24px;width:420px;opacity:.07;z-index:0;pointer-events:none}
.page-hero__inner{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t-3);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--t-3)}
.breadcrumb a:hover{color:var(--cloud)}
.breadcrumb span:last-child{color:var(--t-2);max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.page-hero__row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  padding-bottom:40px;
}
.page-hero h1{
  font-size:clamp(30px,4.6vw,54px);line-height:1.16;font-weight:600;
  max-width:820px;margin-bottom:16px;
}
.page-hero__lead{max-width:720px;color:var(--t-2);font-size:17px}
.hero-banner{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  background:var(--ink-200);margin-bottom:0;
  box-shadow:var(--sh-card);
}
.hero-banner img{width:100%;aspect-ratio:4/1;object-fit:cover}
.hero-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(4,8,15,.1),rgba(4,8,15,.72));
}
.hero-banner__tag{
  position:absolute;left:24px;bottom:20px;z-index:2;
  display:flex;flex-wrap:wrap;gap:8px;
}
.hero-banner__tag span{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12.5px;
  background:rgba(4,8,15,.6);border:1px solid rgba(255,255,255,.14);color:var(--t-1);
  backdrop-filter:blur(6px);
}

/* 锚点标签条 */
.tabbar{
  position:sticky;top:var(--nav-h);z-index:45;
  background:rgba(8,20,34,.9);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-top:1px solid rgba(255,255,255,.05);
  border-bottom:1px solid var(--line);
}
.tabbar__inner{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:10px 0}
.tabbar__inner::-webkit-scrollbar{display:none}
.tabbar__link{
  position:relative;flex:0 0 auto;display:inline-flex;align-items:center;
  height:44px;padding:0 16px;font-size:15px;color:var(--t-2);white-space:nowrap;
}
.tabbar__link::after{
  content:"";position:absolute;left:50%;bottom:4px;height:2px;width:0;
  transform:translateX(-50%);
  background:var(--cloud);box-shadow:0 0 10px rgba(47,211,192,.7);
  transition:width .22s var(--ease);
}
.tabbar__link:hover{color:var(--t-1)}
.tabbar__link:hover::after{width:56%}
.tabbar__link.is-active{color:var(--t-1);font-weight:600}
.tabbar__link.is-active::after{width:88%}

/* 分区通用 */
.zone{padding:88px 0;scroll-margin-top:calc(var(--nav-h) + 76px)}
.zone--alt{background:linear-gradient(180deg,var(--ink-000),var(--ink-100) 40%,var(--ink-000))}
.split{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center}
.split--reverse{grid-template-columns:7fr 5fr}
.split__media{position:relative}
.split h2{font-size:clamp(24px,3vw,36px);margin-bottom:16px}
.split__body>p{color:var(--t-2);margin-bottom:24px}
.split__body>p+p{margin-top:-8px}
.figure{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  background:var(--ink-200);border:1px solid var(--ink-300);
  box-shadow:var(--sh-card);
}
.figure img{width:100%;object-fit:cover;aspect-ratio:16/9}
.figure figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:16px 18px;font-size:13px;color:var(--t-2);
  background:linear-gradient(180deg,rgba(4,8,15,0),rgba(4,8,15,.86));
}

/* 要点清单 */
.point-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 26px}
.point-list li{
  position:relative;padding-left:26px;color:var(--t-2);font-size:15px;line-height:1.75;
}
.point-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;
  background:var(--cloud);box-shadow:0 0 10px rgba(47,211,192,.55);
}
.point-list strong{color:var(--t-1);font-weight:600}

/* 编号步骤 */
.steps{display:grid;gap:14px;counter-reset:step}
.steps li{
  position:relative;counter-increment:step;
  padding:20px 24px 20px 70px;
  background:var(--ink-200);border:1px solid var(--ink-300);
  border-left:3px solid var(--cloud);border-radius:var(--r-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.steps li:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35);box-shadow:var(--sh-card)}
.steps li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:22px;top:20px;
  font-size:14px;font-weight:600;color:var(--cloud);letter-spacing:.06em;
}
.steps h3{font-size:17px;margin-bottom:4px}
.steps p{color:var(--t-2);font-size:15px;line-height:1.75}

/* 卡片横排 */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{
  position:relative;padding:26px 22px 24px;
  background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--cloud),rgba(47,211,192,0));
  transition:box-shadow .22s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(47,211,192,.35);box-shadow:var(--sh-card)}
.card:hover::before{box-shadow:0 0 14px rgba(47,211,192,.6)}
.card__icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(47,211,192,.1);border:1px solid rgba(47,211,192,.24);
  color:var(--cloud);margin-bottom:18px;
}
.card h3{font-size:18px;margin-bottom:8px}
.card p{color:var(--t-2);font-size:15px;line-height:1.75}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-aside{position:sticky;top:calc(var(--nav-h) + 100px)}
.faq-aside h2{font-size:clamp(24px,3vw,36px);margin-bottom:14px}
.faq-aside p{color:var(--t-2);font-size:16px}
.faq-list{display:grid;gap:12px}
.faq-item{
  position:relative;overflow:hidden;
  background:var(--ink-200);border:1px solid var(--ink-300);border-radius:var(--r-card);
  transition:border-color .24s var(--ease);
}
.faq-item.is-open{border-color:rgba(47,211,192,.35)}
.faq-item.is-open::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--cloud);box-shadow:0 0 12px rgba(47,211,192,.6);
}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:14px 24px;background:none;border:0;color:var(--t-1);
  font-size:17px;font-weight:600;text-align:left;cursor:pointer;
}
.faq-q:hover{color:var(--cloud)}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px;transition:transform .26s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--cloud);border-radius:2px}
.faq-icon::before{left:0;top:8px;width:18px;height:2px}
.faq-icon::after{left:8px;top:0;width:2px;height:18px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-a__inner{padding:0 24px 22px;color:var(--t-2);font-size:15px;line-height:1.85}

/* CTA 面板 */
.cta-panel{
  display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center;
  position:relative;padding:48px;
  border-radius:var(--r-panel);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  box-shadow:var(--sh-glass);
  overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(420px 220px at 0% 0%, rgba(47,211,192,.12), transparent 70%),
    radial-gradient(360px 220px at 100% 100%, rgba(255,180,84,.08), transparent 72%);
}
.cta-panel>*{position:relative;z-index:1}
.cta-panel h2{font-size:clamp(24px,3vw,36px);margin-bottom:16px}
.cta-panel p{color:var(--t-2);font-size:16px;margin-bottom:20px}
.cta-points{display:grid;gap:10px;margin-bottom:22px}
.cta-points li{position:relative;padding-left:26px;color:var(--t-1);font-size:15px}
.cta-points li::before{
  content:"";position:absolute;left:0;top:.5em;width:14px;height:8px;
  border-left:2px solid var(--cloud);border-bottom:2px solid var(--cloud);
  transform:rotate(-45deg);transform-origin:left bottom;
}
.cta-meta{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px;color:var(--t-3)}
.cta-meta span{color:var(--t-2)}
.form{display:grid;gap:0}
.field{display:grid;gap:8px;margin-bottom:16px}
.field label{font-size:13px;color:var(--t-2);letter-spacing:.02em}
.field input,.field select,.field textarea{
  width:100%;min-height:48px;padding:12px 16px;
  border-radius:var(--r-btn);
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.12);
  color:var(--t-1);font-size:15px;font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:var(--t-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--cloud);
  box-shadow:0 0 0 2px rgba(47,211,192,.28),inset 0 0 14px rgba(47,211,192,.08);
  background:rgba(255,255,255,.06);
}
.field input:disabled,.field select:disabled{opacity:.45;cursor:not-allowed}
.field.has-error input{border-color:var(--err)}
.field .field-msg{font-size:13px;color:var(--err);min-height:0}
.field.has-success input{border-color:var(--ok)}
.form-note{font-size:13px;color:var(--t-3);margin-top:4px}
.form-actions{display:flex;justify-content:flex-end;margin-top:8px}
.form-actions .btn{width:200px}
.notice{
  display:none;align-items:flex-start;gap:10px;
  padding:12px 16px;margin-bottom:16px;font-size:14px;
  border-radius:var(--r-btn);border-left:4px solid var(--ok);
  background:rgba(53,192,138,.1);color:var(--t-1);
}
.notice.is-error{border-left-color:var(--err);background:rgba(240,101,78,.12)}
.notice.is-visible{display:flex}

/* 页脚 */
.site-footer{
  position:relative;margin-top:104px;
  background:var(--brand-deep);
  padding-top:72px;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,211,192,.55),transparent);
}
.site-footer::after{
  content:"";position:absolute;inset:0 0 auto 0;height:220px;pointer-events:none;
  background:radial-gradient(620px 240px at 12% 0%, rgba(47,211,192,.12), transparent 72%);
}
.footer-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-brand strong{display:block;font-size:18px;color:var(--t-1);margin-bottom:14px;letter-spacing:.03em}
.footer-brand p{color:var(--t-2);font-size:14px;line-height:1.8;max-width:340px}
.footer-col h4{font-size:15px;color:var(--t-1);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:var(--t-2);font-size:14px;display:inline-flex;align-items:center;min-height:32px}
.footer-col a:hover{color:var(--cloud)}
.footer-contact li{color:var(--t-2);font-size:14px;display:flex;gap:10px;align-items:baseline;min-height:32px}
.footer-contact span{color:var(--t-3);flex:0 0 64px}
.footer-bottom{
  position:relative;z-index:1;margin-top:56px;
  border-top:1px solid rgba(255,255,255,.06);
  padding:20px 0;font-size:13px;color:var(--t-3);text-align:center;
}
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:55;
  width:48px;height:48px;border-radius:50%;
  display:none;place-items:center;cursor:pointer;
  background:rgba(8,20,34,.86);border:1px solid rgba(47,211,192,.5);
  color:var(--cloud);box-shadow:0 10px 30px rgba(0,0,0,.45);
  backdrop-filter:blur(10px);
  transition:transform .2s var(--ease),background .2s var(--ease);
}
.to-top.is-visible{display:grid}
.to-top:hover{transform:translateY(-3px);background:rgba(47,211,192,.14)}
.to-top svg{width:18px;height:18px}

/* 图片骨架 */
.figure img,.hero-banner img,.card.is-loading{background:linear-gradient(100deg,var(--ink-200) 30%,#152A42 50%,var(--ink-200) 70%);background-size:200% 100%;animation:shimmer 1.6s linear infinite}
@keyframes shimmer{to{background-position:-200% 0}}
.figure img.is-loaded,.hero-banner img.is-loaded{animation:none;background:var(--ink-200)}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}

/* 平板 */
@media (max-width:1024px){
  :root{--nav-h:60px;--sp-24:20px}
  .nav{grid-template-columns:1fr auto;gap:12px}
  .nav__side--left{display:none}
  .nav__side--right{gap:10px}
  .nav__side--right .nav__link{display:none}
  .nav__brand{justify-self:start;align-items:flex-start;text-align:left;padding:0}
  .nav-toggle{display:block}
  .section{padding:72px 0}
  .zone{padding:64px 0}
  .split,.split--reverse{grid-template-columns:1fr;gap:28px}
  .split--reverse .split__media{order:-1}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .faq-wrap{grid-template-columns:1fr;gap:28px}
  .faq-aside{position:static}
  .cta-panel{grid-template-columns:1fr;gap:32px;padding:36px}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .footer-brand{grid-column:1 / -1}
}

/* 移动 */
@media (max-width:768px){
  .page-hero{padding-top:40px}
  .page-hero__row{flex-direction:column;align-items:flex-start;gap:24px;padding-bottom:32px}
  .page-hero__lead{font-size:16px}
  .hero-banner img{aspect-ratio:16/7}
  .hero-banner__tag{left:16px;bottom:14px}
  .point-list{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .cta-panel{padding:28px 20px}
  .form-actions .btn{width:100%}
  .form-actions{justify-content:stretch}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:480px){
  :root{--sp-24:18px}
  body{font-size:15.5px}
  .container{max-width:380px}
  .page-hero h1{font-size:clamp(26px,7.6vw,34px)}
  .split h2,.section-head h2,.faq-aside h2,.cta-panel h2{font-size:23px}
  .card{padding:22px 18px}
  .steps li{padding:18px 18px 18px 58px}
  .steps li::before{left:16px}
  .footer-grid{grid-template-columns:1fr}
}