/* roulang page: index */
:root{
  --bg-deep:#060C18;
  --bg-panel:#0A1424;
  --bg-elev:#0F1D31;
  --brand-500:#2FD9C4;
  --brand-600:#16A899;
  --brand-300:#7BF3E3;
  --assist-500:#6E8BFF;
  --accent-500:#FFB86B;
  --text-hi:#E9F1FB;
  --text:#C3D1E4;
  --text-dim:#7E90A8;
  --line:rgba(140,190,255,.14);
  --line-soft:rgba(255,255,255,.07);
  --radius-lg:18px;
  --radius-md:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --shadow-glow:0 10px 34px -10px rgba(47,217,196,.55);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text);
  font-family:'Inter',system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',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(1100px 560px at 12% -8%, rgba(47,217,196,.11), transparent 62%),
    radial-gradient(900px 480px at 96% 2%, rgba(110,139,255,.10), transparent 66%);
  z-index:0;
}
body > header,body > main,body > footer{position:relative;z-index:1}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
input,select,textarea{font-family:inherit;font-size:16px}
h1,h2,h3,h4{margin:0;color:var(--text-hi);font-weight:700;letter-spacing:-.005em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(47,217,196,.28);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-deep)}
::-webkit-scrollbar-thumb{background:rgba(47,217,196,.28);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(47,217,196,.45)}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:3px;border-radius:6px}

/* 布局基础 */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-panel{background:var(--bg-panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:40px}
@media (min-width:1024px){.section-head{margin-bottom:56px}}
.rule{display:block;width:12px;height:3px;border-radius:999px;background:var(--brand-500);margin-bottom:14px;box-shadow:0 0 12px rgba(47,217,196,.6)}
.section-title{font-size:clamp(24px,2.6vw,34px);line-height:1.35}
.section-sub{margin-top:14px;font-size:16px;color:var(--text-dim);line-height:1.85}
.section-head-row{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:40px}
@media (min-width:1024px){.section-head-row{margin-bottom:52px}}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-300);font-size:15px;font-weight:600;transition:gap .2s ease,color .2s ease}
.text-link:hover{gap:10px;color:var(--brand-500)}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;letter-spacing:.02em;color:var(--text-dim)}
.meta-dot{width:3px;height:3px;border-radius:50%;background:var(--text-dim);display:inline-block}

/* 徽章 */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;font-size:13px;line-height:1;letter-spacing:.02em;border:1px solid var(--line);color:var(--text)}
.badge-brand{border-color:rgba(47,217,196,.42);background:rgba(47,217,196,.08);color:var(--brand-300)}
.badge-sand{border-color:rgba(255,184,107,.45);background:rgba(255,184,107,.08);color:var(--accent-500)}
.badge-plain{background:rgba(255,255,255,.04);color:var(--text-dim)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
  white-space:nowrap;
}
.btn svg{flex-shrink:0}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#04231F;
  border-color:rgba(255,255,255,.25);
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 14px 44px -10px rgba(47,217,196,.7)}
.btn-primary:active{transform:translateY(-1px);filter:brightness(.98)}
.btn-ghost{
  background:transparent;color:var(--text-hi);border-color:var(--line);
}
.btn-ghost:hover{border-color:var(--brand-300);background:rgba(47,217,196,.06);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(-1px)}
.btn-sm{height:44px;padding:0 18px;font-size:14.5px}
.btn-block{width:100%}

/* 卡片 */
.glass-card{
  position:relative;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
}
.glass-card::before{
  content:'';position:absolute;left:14px;right:14px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);
  pointer-events:none;
}
.solid-card{
  background:var(--bg-elev);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;
}
.site-header.is-scrolled{
  background:rgba(6,12,24,.82);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:74px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(160deg,rgba(47,217,196,.24),rgba(110,139,255,.16));
  border:1px solid var(--line);
  box-shadow:0 6px 20px -12px rgba(47,217,196,.9);
}
.brand-text strong{display:block;font-size:18px;font-weight:700;color:var(--text-hi);line-height:1.15;letter-spacing:.01em}
.brand-text em{display:block;font-style:normal;font-size:12px;color:var(--text-dim);letter-spacing:.06em;margin-top:2px}
.main-nav{display:none}
@media (min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:28px;margin-left:14px}
}
.nav-link{
  position:relative;display:inline-block;padding:8px 0;font-size:16px;font-weight:500;color:var(--text);
  transition:color .18s ease;
}
.nav-link::after{
  content:'';position:absolute;left:0;right:100%;bottom:0;height:2px;border-radius:2px;
  background:var(--brand-500);transition:right .18s ease;
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{right:0}
.nav-link.is-active{color:var(--text-hi)}
.nav-link.is-active::after{right:0}
.header-actions{display:none;align-items:center;gap:12px;margin-left:auto}
@media (min-width:1024px){.header-actions{display:flex}}
.menu-toggle{
  margin-left:auto;width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text-hi);cursor:pointer;
}
@media (min-width:1024px){.menu-toggle{display:none}}
.menu-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.menu-toggle span::before,.menu-toggle span::after{
  content:'';position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.menu-toggle span::before{top:-6px}
.menu-toggle span::after{top:6px}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:70;padding:22px 22px calc(28px + env(safe-area-inset-bottom));
  background:linear-gradient(180deg,rgba(6,12,24,.99),rgba(10,20,36,.99));
  transform:translateY(-100%);transition:transform .34s cubic-bezier(.4,.1,.2,1);
  display:flex;flex-direction:column;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateY(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-close{
  width:42px;height:42px;border-radius:12px;background:rgba(255,255,255,.05);
  border:1px solid var(--line);color:var(--text-hi);font-size:20px;line-height:1;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:28px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 16px;border-radius:14px;font-size:17px;font-weight:600;color:var(--text-hi);
  border:1px solid transparent;transition:background .2s ease,border-color .2s ease;
}
.drawer-nav a:hover,.drawer-nav a.is-active{background:rgba(47,217,196,.07);border-color:var(--line)}
.drawer-nav a span{color:var(--text-dim);font-size:14px;font-weight:400}
.drawer-actions{display:flex;gap:12px;margin-top:auto;padding-top:22px}
.drawer-actions .btn-primary{flex:1.4}
.drawer-actions .btn-ghost{flex:1}

/* 底部行动条 */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:65;display:flex;gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(10,20,36,.96);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  opacity:0;pointer-events:none;transform:translateY(8px);
  transition:opacity .3s ease,transform .3s ease;
}
.mobile-bar.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.mobile-bar .btn{flex:1;height:48px}
@media (min-width:1024px){.mobile-bar{display:none}}
@media (max-width:1023px){body{padding-bottom:74px}}

/* Hero */
.hero{padding:52px 0 56px;position:relative;overflow:hidden}
@media (min-width:1024px){.hero{padding:76px 0 84px}}
.hero-grid{display:grid;gap:44px;align-items:center}
@media (min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:56px}}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:20px}
.hero h1{
  font-size:clamp(30px,4.6vw,50px);
  line-height:1.28;
  letter-spacing:-.005em;
  max-width:16em;
}
.hero-sub{
  margin-top:20px;font-size:18px;line-height:1.8;color:var(--text-dim);max-width:34em;
}
@media (min-width:1024px){.hero-sub{font-size:19px}}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-points{display:flex;flex-wrap:wrap;gap:14px 26px;margin-top:30px}
.hero-point{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;color:var(--text)}
.hero-point i{
  width:18px;height:18px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;
  background:rgba(47,217,196,.12);border:1px solid rgba(47,217,196,.4);
}
.hero-point i::after{content:'';width:6px;height:6px;border-radius:50%;background:var(--brand-500)}
.hero-visual{position:relative}
.hero-visual-inner{padding:16px;border-radius:22px}
.hero-image{position:relative;border-radius:16px;overflow:hidden;aspect-ratio:16/10}
.hero-image img{width:100%;height:100%;object-fit:cover}
.hero-image-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,12,24,.62),rgba(6,12,24,.34) 45%,rgba(6,12,24,.86));
}
.hero-nodes{position:absolute;right:6%;bottom:8%;width:62%;max-width:300px;opacity:.9}
.hero-float{
  position:relative;margin:-46px 12px 0;padding:20px;border-radius:16px;
  background:linear-gradient(180deg,rgba(15,29,49,.98),rgba(10,20,36,.98));
  border:1px solid var(--line);
  box-shadow:0 20px 44px -22px rgba(0,0,0,.9);
}
.hero-float-title{font-size:13px;letter-spacing:.06em;color:var(--text-dim);margin-bottom:14px}
.hero-float ul{display:flex;flex-direction:column;gap:11px}
.hero-float li{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:15px;color:var(--text)}
.hero-float li b{font-weight:600;color:var(--brand-300)}

/* 信任条 */
.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(10,20,36,.5)}
.trust-inner{padding:30px 0}
.trust-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 20px}
@media (min-width:768px){.trust-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.trust-item .num{font-size:34px;font-weight:700;line-height:1.1;color:var(--accent-500);font-variant-numeric:tabular-nums}
.trust-item .num small{font-size:16px;font-weight:600;margin-left:2px}
.trust-item .label{margin-top:8px;font-size:14.5px;color:var(--text-dim)}
.trust-note{margin-top:24px;padding-top:22px;border-top:1px solid var(--line-soft);font-size:14.5px;color:var(--text-dim)}

/* 服务板块 */
.service-grid{display:grid;gap:20px}
@media (min-width:1024px){
  .service-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .service-wide{grid-column:span 2;display:grid;grid-template-columns:1.15fr .85fr;gap:0}
}
.service-card{padding:26px;position:relative;overflow:hidden;transition:border-color .24s ease,transform .24s ease}
@media (min-width:1024px){.service-card{padding:30px}}
.service-card:hover{border-color:rgba(47,217,196,.36);transform:translateY(-3px)}
.service-no{
  font-size:64px;font-weight:700;line-height:1;color:rgba(123,243,227,.14);
  font-variant-numeric:tabular-nums;letter-spacing:-.04em;
}
.service-card h3{margin-top:16px;font-size:20px}
.service-card p{margin-top:12px;font-size:15.5px;line-height:1.85;color:var(--text-dim)}
.service-list{margin-top:18px;display:flex;flex-direction:column;gap:10px}
.service-list li{display:flex;gap:10px;font-size:15px;color:var(--text);line-height:1.7}
.service-list li::before{
  content:'';width:7px;height:7px;border-radius:2px;background:var(--brand-500);
  margin-top:9px;flex-shrink:0;
}
.service-visual{position:relative;min-height:220px;border-radius:16px;overflow:hidden}
.service-visual img{width:100%;height:100%;object-fit:cover;min-height:220px}
.service-visual::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,12,24,.35),rgba(6,12,24,.82));
}
@media (max-width:1023px){.service-wide{display:block}.service-visual{margin-top:22px}}

/* 优势数据带 */
.adv-grid{display:grid;gap:36px;align-items:start}
@media (min-width:1024px){.adv-grid{grid-template-columns:5fr 7fr;gap:64px}}
.adv-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line-soft);border-left:1px solid var(--line-soft)}
.adv-cell{padding:24px 22px;border-right:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.adv-cell .num{
  font-size:clamp(32px,4vw,44px);font-weight:700;line-height:1.1;
  color:var(--brand-300);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.adv-cell .num.sand{color:var(--accent-500)}
.adv-cell .title{margin-top:10px;font-size:16px;font-weight:600;color:var(--text-hi)}
.adv-cell .desc{margin-top:8px;font-size:14.5px;color:var(--text-dim);line-height:1.8}
.scale-line{
  margin-top:34px;height:18px;position:relative;
  background-image:linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:8.333% 100%;border-bottom:1px solid var(--line);opacity:.8;
}
.scale-line::after{
  content:'';position:absolute;left:0;bottom:-1px;width:38%;height:2px;border-radius:2px;
  background:linear-gradient(90deg,rgba(47,217,196,.9),rgba(47,217,196,0));
}

/* 案例错落 */
.case-grid{display:grid;gap:20px}
@media (min-width:1024px){.case-grid{grid-template-columns:1fr 1fr;gap:24px}}
.case-col{display:grid;gap:20px}
.case-card{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line-soft);
  background:var(--bg-elev);box-shadow:var(--shadow-card);
  transition:transform .24s ease,border-color .24s ease;
}
.case-card:hover{transform:translateY(-3px);border-color:rgba(47,217,196,.3)}
.case-media{position:relative;aspect-ratio:16/10;overflow:hidden}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.case-card:hover .case-media img{transform:scale(1.04)}
.case-media::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(6,12,24,.88))}
.case-body{padding:20px 22px 22px}
.case-body h3{font-size:18px}
.case-body p{margin-top:10px;font-size:14.8px;line-height:1.8;color:var(--text-dim)}
.case-foot{margin-top:16px;font-size:12.5px;letter-spacing:.02em;color:var(--text-dim)}
.case-tall .case-media{aspect-ratio:4/5}
.case-tall .case-body h3{font-size:20px}

/* 时间轴方案 */
.timeline{position:relative;display:grid;gap:26px}
@media (min-width:1024px){.timeline{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}}
.timeline-line{display:none}
@media (min-width:1024px){
  .timeline-line{
    display:block;position:absolute;top:11px;left:4%;right:4%;height:1px;
    background:linear-gradient(90deg,rgba(47,217,196,.85),rgba(47,217,196,.25) 55%,transparent);
  }
}
.tl-step{position:relative;padding-left:52px}
@media (min-width:1024px){.tl-step{padding-left:0;padding-top:38px}}
.tl-node{
  position:absolute;left:0;top:0;width:24px;height:24px;border-radius:50%;
  background:rgba(47,217,196,.18);border:1px solid rgba(47,217,196,.55);
  display:grid;place-items:center;
  box-shadow:0 0 0 5px rgba(47,217,196,.06),0 0 20px rgba(47,217,196,.45);
}
.tl-node::after{content:'';width:9px;height:9px;border-radius:50%;background:var(--brand-500)}
@media (min-width:1024px){.tl-node{top:0;left:0}}
.tl-stem{display:none}
@media (max-width:1023px){
  .tl-stem{display:block;position:absolute;left:11px;top:26px;bottom:-26px;width:1px;
    background:linear-gradient(180deg,rgba(47,217,196,.5),rgba(47,217,196,0))}
  .timeline .tl-step:last-child .tl-stem{display:none}
}
.tl-step h3{font-size:17px;font-weight:600}
.tl-step p{margin-top:10px;font-size:14.8px;line-height:1.82;color:var(--text-dim)}

/* 最新信息（CMS 区） */
.latest-grid{display:grid;gap:20px}
@media (min-width:1024px){.latest-grid{grid-template-columns:1.05fr 1fr;gap:24px}}
.latest-feature{overflow:hidden;display:flex;flex-direction:column}
.latest-feature-cover{display:block;aspect-ratio:16/10;overflow:hidden}
.latest-feature-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.latest-feature:hover .latest-feature-cover img{transform:scale(1.03)}
.latest-feature-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.latest-feature-body h3{font-size:20px;line-height:1.5}
.latest-feature-body h3 a:hover{color:var(--brand-300)}
.latest-excerpt{
  font-size:15px;line-height:1.82;color:var(--text-dim);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.latest-list{display:flex;flex-direction:column;gap:14px}
.latest-row{
  display:grid;grid-template-columns:96px 1fr;gap:16px;padding:14px;
  border:1px solid var(--line-soft);border-radius:var(--radius-md);background:var(--bg-elev);
  transition:border-color .22s ease,transform .22s ease;
}
.latest-row:hover{border-color:rgba(47,217,196,.34);transform:translateX(3px)}
.latest-row-thumb{border-radius:12px;overflow:hidden;aspect-ratio:4/3;display:block}
.latest-row-thumb img{width:100%;height:100%;object-fit:cover}
.latest-row-body h4{font-size:16px;line-height:1.55;font-weight:600}
.latest-row-body h4 a:hover{color:var(--brand-300)}
.latest-row-body p{
  margin-top:8px;font-size:14px;line-height:1.75;color:var(--text-dim);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.latest-row-body .meta-row{margin-top:10px}
@media (max-width:520px){.latest-row{grid-template-columns:1fr}.latest-row-thumb{aspect-ratio:16/9}}
.latest-empty{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:16px;text-align:center;padding:32px;
}
.latest-empty .icon{
  width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
  background:rgba(47,217,196,.08);border:1px solid rgba(47,217,196,.3);color:var(--brand-300);
}
.latest-empty p{color:var(--text-dim);font-size:15px}

/* FAQ */
.faq-layout{display:grid;gap:28px}
@media (min-width:1024px){.faq-layout{grid-template-columns:1fr 300px;gap:40px;align-items:start}}
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{
  border-radius:var(--radius-md);border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  overflow:hidden;transition:border-color .22s ease;
}
.faq-item:hover{border-color:rgba(123,243,227,.4)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--text-hi);line-height:1.6;
}
.faq-icon{
  width:26px;height:26px;border-radius:50%;flex-shrink:0;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--brand-300);
  transition:transform .26s ease,border-color .26s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:rgba(47,217,196,.5)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a-inner{padding:0 20px 18px;font-size:15px;line-height:1.9;color:var(--text)}
.faq-aside{padding:24px}
.faq-aside h3{font-size:18px}
.faq-aside p{margin-top:12px;font-size:14.8px;line-height:1.8;color:var(--text-dim)}
.faq-aside .btn{margin-top:20px}

/* 联系 */
.contact-grid{display:grid;gap:24px}
@media (min-width:1024px){.contact-grid{grid-template-columns:5fr 7fr;gap:28px;align-items:start}}
.info-card{padding:28px}
.info-list{margin-top:22px;display:flex;flex-direction:column;gap:18px}
.info-item{display:flex;gap:14px}
.info-item .ico{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;display:grid;place-items:center;
  background:rgba(47,217,196,.08);border:1px solid var(--line);color:var(--brand-300);
}
.info-item .k{font-size:13px;color:var(--text-dim);letter-spacing:.04em}
.info-item .v{margin-top:4px;font-size:15.5px;color:var(--text-hi);word-break:break-all}
.form-card{padding:28px}
.form-grid{display:grid;gap:18px}
@media (min-width:768px){.form-grid{grid-template-columns:1fr 1fr}.form-grid .full{grid-column:span 2}}
.field label{display:block;font-size:13px;font-weight:500;color:var(--text);margin-bottom:8px}
.field label .req{color:var(--accent-500);margin-left:4px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text-hi);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{height:auto;min-height:120px;padding:13px 14px;line-height:1.8;resize:vertical}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-dim) 50%),linear-gradient(135deg,var(--text-dim) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field input::placeholder,.field textarea::placeholder{color:var(--text-dim)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-300);box-shadow:0 0 0 3px rgba(47,217,196,.18);
  background:rgba(255,255,255,.06);
}
.form-note{
  margin-top:14px;font-size:14px;min-height:22px;color:var(--text-dim);
}
.form-note.ok{color:var(--brand-300)}
.form-note.err{color:#FF9C9C}

/* 页脚 */
.site-footer{background:var(--bg-panel);border-top:1px solid var(--line);margin-top:8px}
.footer-grid{
  display:grid;gap:32px;padding-top:56px;padding-bottom:44px;
  grid-template-columns:1fr;
}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}}
.footer-brand .brand{margin-bottom:16px}
.footer-desc{font-size:14.5px;line-height:1.85;color:var(--text-dim);max-width:30em}
.footer-contact{margin-top:16px;font-size:14px;line-height:2;color:var(--text-dim)}
.footer-contact b{color:var(--text);font-weight:500}
.footer-col h3{font-size:15px;font-weight:600;letter-spacing:.02em;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14.5px;color:var(--text-dim);transition:color .2s ease}
.footer-col a:hover{color:var(--brand-300)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding-top:20px;padding-bottom:26px;border-top:1px solid var(--line-soft);
  font-size:12.5px;color:var(--text-dim);
}
.footer-bottom .dot{opacity:.5}
.footer-bottom .to-top{margin-left:auto;color:var(--text-dim);transition:color .2s ease}
.footer-bottom .to-top:hover{color:var(--brand-300)}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .45s ease,transform .45s ease;transition-delay:var(--d,0ms)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation:none!important}
}

/* roulang page: article */
:root{
  --bg-deep:#060C18;
  --bg-panel:#0A1424;
  --bg-elev:#0F1D31;
  --brand-500:#2FD9C4;
  --brand-600:#16A899;
  --brand-300:#7BF3E3;
  --assist-500:#6E8BFF;
  --accent-500:#FFB86B;
  --text-hi:#E9F1FB;
  --text:#C3D1E4;
  --text-dim:#7E90A8;
  --line:rgba(140,190,255,0.14);
  --line-soft:rgba(255,255,255,0.07);
  --radius:18px;
  --radius-sm:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --shadow-glow:0 10px 34px -10px rgba(47,217,196,.55);
  --font: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(47,217,196,.10), transparent 62%),
    radial-gradient(760px 460px at 96% 4%, rgba(110,139,255,.10), transparent 60%),
    var(--bg-deep);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{color:var(--text-hi);margin:0;font-weight:700;letter-spacing:-.005em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(47,217,196,.28);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-deep)}
::-webkit-scrollbar-thumb{background:rgba(47,217,196,.28);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(47,217,196,.45)}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:3px;border-radius:6px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ============ 品牌 ============ */
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;display:grid;place-items:center;border-radius:12px;
  background:linear-gradient(160deg, rgba(47,217,196,.20), rgba(110,139,255,.12));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:18px;font-weight:700;color:var(--text-hi);letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-dim);letter-spacing:.06em}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:999px;border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease, color .22s ease, filter .22s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{
  background:linear-gradient(180deg, var(--brand-500), var(--brand-600));
  color:#04231F;border-color:rgba(255,255,255,.25);
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 14px 44px -10px rgba(47,217,196,.68)}
.btn-primary:active{transform:translateY(-1px);box-shadow:0 8px 22px -10px rgba(47,217,196,.5)}
.btn-ghost{
  background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text-hi);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:var(--brand-300);background:rgba(47,217,196,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(-1px)}
.btn-block{width:100%}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.site-header.is-scrolled{
  background:rgba(6,12,24,.82);
  backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:74px}
.main-nav{display:none;align-items:center;gap:26px;margin-left:auto}
.nav-link{
  position:relative;font-size:15.5px;font-weight:500;color:var(--text);
  padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-hi)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:none;align-items:center;gap:12px;margin-left:8px}
.nav-toggle{
  margin-left:auto;width:44px;height:44px;display:grid;place-items:center;
  border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.04);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-hi);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-hi);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-drawer{
  display:none;border-top:1px solid var(--line);
  background:rgba(6,12,24,.98);backdrop-filter:blur(18px);
  background-image:radial-gradient(600px 300px at 90% 0%, rgba(47,217,196,.10), transparent 70%);
}
.mobile-drawer.is-open{display:block}
.mobile-drawer .drawer-links{display:flex;flex-direction:column;padding:12px 0 4px}
.mobile-drawer .drawer-links a{
  padding:14px 0;font-size:16px;color:var(--text);border-bottom:1px solid var(--line-soft);
}
.mobile-drawer .drawer-links a.is-active{color:var(--brand-300)}
.mobile-drawer .drawer-cta{display:flex;gap:10px;padding:18px 0 24px}
.mobile-drawer .drawer-cta .btn-primary{flex:1.5}
.mobile-drawer .drawer-cta .btn-ghost{flex:1}
@media (min-width:1024px){
  .main-nav{display:flex}
  .nav-actions{display:flex}
  .nav-toggle{display:none}
  .mobile-drawer{display:none !important}
}

/* ============ 文章横幅 ============ */
.article-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg, rgba(6,12,24,.62) 0%, rgba(6,12,24,.86) 68%, var(--bg-deep) 100%);
}
.article-hero .hero-inner{position:relative;z-index:2;padding:52px 0 44px;max-width:880px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-dim);letter-spacing:.02em}
.breadcrumb a{color:var(--text-dim);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand-300)}
.breadcrumb .sep{opacity:.55}
.breadcrumb .current{color:var(--text-hi)}
.hero-badge-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:18px 0 14px}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:13px;line-height:1;letter-spacing:.02em;
  border:1px solid rgba(47,217,196,.42);background:rgba(47,217,196,.08);color:var(--brand-300);
}
.badge-accent{border-color:rgba(255,184,107,.42);background:rgba(255,184,107,.08);color:var(--accent-500)}
.article-hero h1{font-size:clamp(27px,4.2vw,44px);line-height:1.3;font-weight:700;letter-spacing:-.005em}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  margin-top:20px;font-size:13px;color:var(--text-dim);letter-spacing:.02em;
}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:var(--text-dim);display:inline-block}
.meta-row .copy-btn{
  margin-left:auto;display:inline-flex;align-items:center;gap:6px;
  height:34px;padding:0 14px;border-radius:999px;font-size:13px;
  border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;
  transition:border-color .2s ease, color .2s ease, background .2s ease;
}
.meta-row .copy-btn:hover{border-color:var(--brand-300);color:var(--brand-300);background:rgba(47,217,196,.08)}

/* ============ 布局 ============ */
.layout{display:grid;grid-template-columns:1fr;gap:32px;padding:44px 0 8px}
@media (min-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr) 320px;gap:48px;padding:56px 0 12px}
}
.content-col{min-width:0}

/* ============ 正文排版 ============ */
.prose{font-size:16.5px;line-height:1.95;color:var(--text)}
.prose > * + *{margin-top:20px}
.prose p{margin:0}
.prose h2{
  position:relative;font-size:clamp(21px,2.2vw,27px);line-height:1.4;
  margin:48px 0 0;padding-left:14px;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;
  background:linear-gradient(180deg, var(--brand-300), rgba(47,217,196,.15));
  box-shadow:0 0 14px rgba(47,217,196,.55);
}
.prose h3{font-size:20px;line-height:1.5;margin:32px 0 0}
.prose h4{font-size:17px;line-height:1.55;margin:24px 0 0;color:var(--text-hi);font-weight:600}
.prose ul,.prose ol{margin:0;padding-left:2px}
.prose li{position:relative;padding-left:20px;line-height:1.9}
.prose li + li{margin-top:8px}
.prose ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;
  background:var(--brand-500);box-shadow:0 0 10px rgba(47,217,196,.5);
}
.prose ol{counter-reset:olc}
.prose ol li{counter-increment:olc}
.prose ol li::before{
  content:counter(olc);position:absolute;left:0;top:.42em;width:20px;height:20px;border-radius:999px;
  display:grid;place-items:center;font-size:12px;font-weight:700;color:#04231F;
  background:var(--brand-500);
}
.prose blockquote{
  margin:0;padding:18px 22px;border-radius:var(--radius-sm);
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border:1px solid var(--line);border-left:3px solid var(--brand-500);
  color:var(--text);font-size:16px;line-height:1.9;
}
.prose a{color:var(--brand-300);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1.5px}
.prose a:hover{color:var(--brand-500)}
.prose img{border-radius:var(--radius-sm);margin:24px 0 8px;width:100%}
.prose figure{margin:24px 0}
.prose figcaption{font-size:13px;color:var(--text-dim);text-align:center;margin-top:8px}
.prose table{
  width:100%;border-collapse:collapse;border:1px solid var(--line);
  border-radius:var(--radius-sm);overflow:hidden;font-size:15px;display:table;
}
.prose .table-wrap{overflow-x:auto;margin:24px 0}
.prose thead th{
  background:rgba(47,217,196,.10);color:var(--text-hi);font-weight:600;
  padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);
}
.prose tbody td{padding:12px 14px;border-bottom:1px solid var(--line-soft)}
.prose tbody tr:nth-child(even){background:rgba(255,255,255,.025)}
.prose hr{border:0;height:1px;background:var(--line);margin:36px 0}
.prose code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14.5px;
  background:rgba(47,217,196,.10);color:var(--brand-300);
  padding:2px 6px;border-radius:6px;
}
.prose pre{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 18px;overflow-x:auto;font-size:14.5px;line-height:1.8;
}
.prose pre code{background:none;padding:0;color:var(--text)}
.prose h2 + *, .prose h3 + *, .prose h4 + *{margin-top:14px}

/* ============ 尾部 ============ */
.article-foot{margin-top:52px;padding-top:28px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 13px;border-radius:999px;
  font-size:13px;color:var(--text);border:1px solid var(--line-soft);background:rgba(255,255,255,.03);
  transition:border-color .2s ease, color .2s ease;
}
.tag:hover{border-color:var(--brand-300);color:var(--brand-300)}
.tag-label{font-size:13px;color:var(--text-dim);letter-spacing:.06em;margin-right:2px}
.foot-nav{display:grid;grid-template-columns:1fr;gap:14px;margin-top:26px}
@media (min-width:768px){.foot-nav{grid-template-columns:1fr 1fr}}
.foot-nav a{
  display:block;padding:18px 20px;border-radius:var(--radius-sm);
  background:var(--bg-elev);border:1px solid var(--line-soft);
  transition:border-color .22s ease, transform .22s ease, box-shadow .22s ease;
}
.foot-nav a:hover{border-color:rgba(47,217,196,.45);transform:translateY(-3px);box-shadow:var(--shadow-card)}
.foot-nav .fn-label{font-size:13px;color:var(--text-dim);letter-spacing:.04em}
.foot-nav .fn-title{font-size:16px;font-weight:600;color:var(--text-hi);margin-top:6px;line-height:1.5}
.foot-nav .fn-cat{font-size:13px;color:var(--brand-300);margin-top:8px}

.related{margin-top:44px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:22px}
.section-head h2{font-size:clamp(20px,2.1vw,26px);line-height:1.4}
.section-head h2::before{
  content:"";display:block;width:12px;height:3px;border-radius:3px;background:var(--brand-500);margin-bottom:12px;
}
.rel-grid{display:grid;grid-template-columns:1fr;gap:16px}
@media (min-width:768px){.rel-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--radius-sm);
  background:var(--bg-elev);border:1px solid var(--line-soft);
  transition:transform .24s ease, border-color .24s ease, box-shadow .24s ease;
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(47,217,196,.4);box-shadow:var(--shadow-card)}
.rel-card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--bg-panel)}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.rel-card:hover .thumb img{transform:scale(1.05)}
.rel-card .rc-body{padding:16px 18px 18px}
.rel-card h3{font-size:16.5px;font-weight:600;line-height:1.5}
.rel-card p{font-size:14.5px;color:var(--text-dim);line-height:1.8;margin-top:8px}
.rel-card .rc-meta{font-size:13px;color:var(--text-dim);margin-top:12px;letter-spacing:.02em}
.back-row{display:flex;justify-content:center;margin:38px 0 6px}

/* ============ 侧栏 ============ */
.side-col{display:flex;flex-direction:column;gap:20px}
.side-card{
  border-radius:var(--radius);padding:22px;
  background:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.10), var(--shadow-card);
  backdrop-filter:blur(16px);
}
.side-card.solid{background:var(--bg-elev);border-color:var(--line-soft);box-shadow:var(--shadow-card)}
.side-card h3{font-size:16px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:10px;height:3px;border-radius:3px;background:var(--brand-500)}
.side-list{display:flex;flex-direction:column}
.side-list li + li{border-top:1px solid var(--line-soft)}
.side-list a{
  display:block;padding:12px 0;font-size:14.5px;color:var(--text);line-height:1.7;
  transition:color .2s ease, padding-left .2s ease;
}
.side-list a:hover{color:var(--brand-300);padding-left:4px}
.side-list .sl-meta{display:block;font-size:12.5px;color:var(--text-dim);margin-top:4px}
.side-note{font-size:14px;color:var(--text-dim);line-height:1.85}
.side-card .btn{margin-top:16px}
@media (min-width:1024px){
  .sticky-side{position:sticky;top:96px}
}
.quick-list{display:flex;flex-direction:column;gap:12px;margin-top:6px}
.quick-list li{display:flex;gap:10px;font-size:14.5px;line-height:1.8;color:var(--text)}
.quick-list li span.num{
  flex:0 0 22px;height:22px;border-radius:999px;display:grid;place-items:center;
  font-size:12px;font-weight:700;color:var(--brand-300);
  background:rgba(47,217,196,.12);border:1px solid rgba(47,217,196,.35);
  margin-top:5px;
}

/* ============ 空态 ============ */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  gap:14px;padding:64px 24px;border-radius:var(--radius);
  background:var(--bg-elev);border:1px dashed var(--line);
}
.empty-state h2{font-size:22px}
.empty-state p{color:var(--text-dim);font-size:15px;max-width:420px}

/* ============ CTA 带 ============ */
.cta-band{margin-top:64px;background:var(--bg-panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-inner{
  display:flex;flex-direction:column;gap:22px;align-items:flex-start;
  padding:44px 0;
}
@media (min-width:900px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;padding:52px 0}
}
.cta-inner h2{font-size:clamp(21px,2.3vw,28px);line-height:1.4}
.cta-inner p{color:var(--text-dim);font-size:15.5px;margin-top:10px;max-width:600px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-panel);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:56px 0 40px}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}}
.footer-col h3{font-size:15px;font-weight:700;margin-bottom:16px;color:var(--text-hi)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14.5px;color:var(--text-dim);transition:color .2s ease}
.footer-col ul a:hover{color:var(--brand-300)}
.footer-brand .brand{margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--text-dim);line-height:1.85;max-width:300px}
.footer-contact{font-size:14px;color:var(--text-dim);line-height:2;margin-top:16px}
.footer-contact b{color:var(--text);font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:20px 0 28px;border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--text-dim);
}
.footer-bottom .dot{font-size:8px;opacity:.6}
.footer-bottom .to-top{margin-left:auto;color:var(--text-dim);transition:color .2s ease}
.footer-bottom .to-top:hover{color:var(--brand-300)}

/* ============ 移动端底部行动条 ============ */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;gap:10px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(6,12,24,.92);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  transform:translateY(110%);transition:transform .34s ease;
}
.mobile-bar.is-visible{transform:translateY(0)}
.mobile-bar .btn{flex:1}
@media (min-width:1024px){.mobile-bar{display:none}}

/* ============ 顶部回浮 ============ */
.to-top-float{
  position:fixed;right:20px;bottom:88px;z-index:65;
  width:44px;height:44px;border-radius:999px;display:none;place-items:center;
  background:rgba(15,29,49,.9);border:1px solid var(--line);color:var(--brand-300);
  cursor:pointer;backdrop-filter:blur(10px);
  transition:opacity .25s ease, transform .25s ease, border-color .25s ease;
}
.to-top-float.is-visible{display:grid}
.to-top-float:hover{border-color:var(--brand-300);transform:translateY(-3px)}
@media (min-width:1024px){.to-top-float{bottom:32px}}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .45s ease, transform .45s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .btn,.rel-card,.foot-nav a{transition:none}
}

/* roulang page: category1 */
:root{
  --bg-deep:#060C18;
  --bg-panel:#0A1424;
  --bg-elev:#0F1D31;
  --brand-500:#2FD9C4;
  --brand-600:#16A899;
  --brand-300:#7BF3E3;
  --assist-500:#6E8BFF;
  --accent-500:#FFB86B;
  --text-hi:#E9F1FB;
  --text:#C3D1E4;
  --text-dim:#7E90A8;
  --line:rgba(140,190,255,.14);
  --line-soft:rgba(255,255,255,.07);
  --radius:18px;
  --radius-sm:14px;
  --shadow:0 18px 40px -24px rgba(0,0,0,.75);
  --glass:linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text);
  font-family:'Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(47,217,196,.28);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-deep)}
::-webkit-scrollbar-thumb{background:rgba(47,217,196,.28);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(47,217,196,.45)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}

/* ============ 头部导航 ============ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:80;transition:background .3s ease,border-color .3s ease,backdrop-filter .3s ease;border-bottom:1px solid transparent}
.site-header.is-scrolled{background:rgba(6,12,24,.84);backdrop-filter:blur(16px);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:76px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(160deg,rgba(47,217,196,.20),rgba(110,139,255,.12));border:1px solid var(--line);box-shadow:0 0 0 1px rgba(47,217,196,.10) inset}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:18px;font-weight:700;color:var(--text-hi);letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-dim);letter-spacing:.06em;margin-top:2px}
.main-nav{display:none;align-items:center;gap:28px}
@media(min-width:1024px){.main-nav{display:flex}}
.nav-link{position:relative;font-size:16px;font-weight:500;color:var(--text-dim);padding:6px 0}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand-500);border-radius:2px;transition:width .18s ease}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--text-hi)}
.nav-link.is-active::after{width:100%}
.nav-actions{display:none;align-items:center;gap:12px}
@media(min-width:1024px){.nav-actions{display:flex}}
.nav-toggle{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.04);display:grid;place-items:center;gap:4px}
@media(min-width:1024px){.nav-toggle{display:none}}
.nav-toggle span{display:block;width:18px;height:1.6px;background:var(--text-hi);border-radius:2px}

.mobile-drawer{position:fixed;inset:0;z-index:90;background:rgba(6,12,24,.98);transform:translateY(-102%);transition:transform .34s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;padding:26px 22px 120px;overflow-y:auto}
.mobile-drawer.is-open{transform:translateY(0)}
.mobile-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--text-hi);font-size:20px;line-height:1}
.drawer-link{display:block;padding:16px 0;font-size:19px;font-weight:600;color:var(--text-dim);border-bottom:1px solid var(--line-soft)}
.drawer-link.is-active{color:var(--brand-300)}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:999px;font-size:15px;font-weight:600;letter-spacing:.01em;border:1px solid transparent;transition:transform .18s ease,box-shadow .22s ease,background-color .2s ease,border-color .2s ease,color .2s ease;white-space:nowrap}
.btn-primary{background:linear-gradient(180deg,var(--brand-500),var(--brand-600));color:#04231F;box-shadow:0 10px 34px -10px rgba(47,217,196,.55),inset 0 0 0 1px rgba(255,255,255,.25)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 16px 44px -12px rgba(47,217,196,.72),inset 0 0 0 1px rgba(255,255,255,.3)}
.btn-primary:active{transform:translateY(-1px)}
.btn-ghost{background:rgba(255,255,255,.03);border-color:var(--line);color:var(--text-hi);backdrop-filter:blur(10px)}
.btn-ghost:hover{border-color:var(--brand-300);background:rgba(47,217,196,.08);color:#fff}
.btn:focus-visible{outline:2px solid var(--brand-300);outline-offset:3px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-block{width:100%}

/* ============ 分类 Hero ============ */
.cat-hero{position:relative;overflow:hidden;padding:132px 0 56px;border-bottom:1px solid var(--line)}
@media(min-width:1024px){.cat-hero{padding:158px 0 72px}}
.cat-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.34}
.cat-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,12,24,.66) 0%,rgba(6,12,24,.86) 62%,var(--bg-deep) 100%)}
.cat-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-dim);margin-bottom:20px}
.crumb a:hover{color:var(--brand-300)}
.crumb .sep{color:rgba(126,144,168,.6)}
.crumb .current{color:var(--text-hi)}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:13px;font-weight:600;letter-spacing:.02em}
.badge-brand{border:1px solid rgba(47,217,196,.45);background:rgba(47,217,196,.08);color:var(--brand-300)}
.badge-accent{border:1px solid rgba(255,184,107,.45);background:rgba(255,184,107,.08);color:var(--accent-500)}
.hero-title{font-size:clamp(30px,4.6vw,50px);line-height:1.28;font-weight:700;letter-spacing:-.005em;color:var(--text-hi);margin:18px 0 16px;max-width:900px}
.hero-sub{font-size:18px;line-height:1.8;color:var(--text-dim);max-width:760px}
.hero-points{display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:28px}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:14.5px;color:var(--text)}
.hero-points svg{flex-shrink:0}

/* 锚点 chip 行 */
.anchor-bar{position:sticky;top:76px;z-index:50;background:rgba(6,12,24,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.anchor-inner{display:flex;align-items:center;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-label{font-size:13px;color:var(--text-dim);letter-spacing:.08em;flex-shrink:0;padding-right:6px;border-right:1px solid var(--line);margin-right:4px}
.chip{flex-shrink:0;display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);font-size:14px;color:var(--text);transition:.2s ease}
.chip:hover,.chip:focus-visible{border-color:var(--brand-300);color:#fff;background:rgba(47,217,196,.08);outline:none}

/* ============ 板块 ============ */
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.section-panel{background:var(--bg-panel);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.16em;color:var(--brand-300);font-weight:600}
.eyebrow::before{content:"";width:12px;height:3px;border-radius:2px;background:var(--brand-500)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.35;font-weight:700;color:var(--text-hi);margin:16px 0 14px}
.section-head p{font-size:16px;color:var(--text-dim);line-height:1.85}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* 卡片 */
.card{background:var(--bg-elev);border:1px solid var(--line-soft);border-radius:var(--radius);box-shadow:var(--shadow)}
.glass{background:var(--glass);border:1px solid var(--line);border-radius:var(--radius);backdrop-filter:blur(16px);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.06)}
.pad{padding:22px}
@media(min-width:1024px){.pad{padding:26px}}

/* 入口类型网格（非等宽） */
.entry-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:900px){
  .entry-grid{grid-template-columns:repeat(12,1fr);gap:24px}
  .entry-card:nth-child(1){grid-column:span 6}
  .entry-card:nth-child(2){grid-column:span 6}
  .entry-card:nth-child(3){grid-column:span 5}
  .entry-card:nth-child(4){grid-column:span 7}
}
.entry-card{position:relative;overflow:hidden;display:flex;flex-direction:column;gap:14px;transition:transform .22s ease,border-color .22s ease}
.entry-card:hover{transform:translateY(-4px);border-color:rgba(123,243,227,.4)}
.entry-num{font-size:44px;font-weight:700;line-height:1;color:rgba(123,243,227,.22);letter-spacing:-.02em}
.entry-card h3{font-size:20px;font-weight:700;color:var(--text-hi)}
.entry-card p{font-size:15px;color:var(--text-dim);line-height:1.85}
.entry-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:8px;border:1px solid var(--line-soft);background:rgba(255,255,255,.03);font-size:12.5px;color:var(--text-dim)}
.entry-thumb{border-radius:var(--radius-sm);overflow:hidden;aspect-ratio:16/10;background:var(--bg-panel)}
.entry-thumb img{width:100%;height:100%;object-fit:cover;opacity:.9}

/* 核对要点：左文右图 */
.check-split{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
@media(min-width:1024px){.check-split{grid-template-columns:5fr 6fr;gap:56px}}
.check-visual{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.check-visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.check-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(6,12,24,.72),rgba(6,12,24,0) 58%)}
.check-list{counter-reset:chk;display:grid;gap:14px;margin-top:26px}
.check-list li{position:relative;padding:16px 18px 16px 58px;border-radius:var(--radius-sm);border:1px solid var(--line-soft);background:rgba(255,255,255,.025)}
.check-list li::before{counter-increment:chk;content:counter(chk,decimal-leading-zero);position:absolute;left:18px;top:16px;font-size:13px;font-weight:700;color:var(--brand-300);letter-spacing:.04em}
.check-list h4{font-size:16px;font-weight:600;color:var(--text-hi);margin-bottom:4px}
.check-list p{font-size:14.5px;color:var(--text-dim);line-height:1.8}

/* 对照表 */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:var(--glass);backdrop-filter:blur(16px);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;min-width:680px}
thead th{font-size:13.5px;letter-spacing:.04em;color:var(--brand-300);text-align:left;padding:18px 22px;border-bottom:1px solid var(--line);font-weight:600;white-space:nowrap}
tbody td{padding:18px 22px;font-size:15px;color:var(--text);border-bottom:1px solid var(--line-soft);line-height:1.8;vertical-align:top}
tbody tr:nth-child(even){background:rgba(255,255,255,.022)}
tbody tr:last-child td{border-bottom:none}
tbody td:first-child{color:var(--text-hi);font-weight:600;white-space:nowrap}
.table-hint{margin-top:14px;font-size:14px;color:var(--text-dim)}

/* 时间轴流程 */
.steps{display:grid;gap:22px}
@media(min-width:1024px){.steps{grid-template-columns:repeat(4,1fr);gap:24px}}
.step{position:relative;padding-top:26px}
.step::before{content:"";position:absolute;top:11px;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(47,217,196,.6),rgba(47,217,196,0) 92%)}
@media(max-width:1023px){.step::before{top:11px;left:0;right:auto;width:100%}}
.step-dot{position:absolute;top:4px;left:0;width:15px;height:15px;border-radius:50%;background:var(--brand-500);box-shadow:0 0 0 5px rgba(47,217,196,.14),0 0 22px rgba(47,217,196,.55)}
.step h3{font-size:18px;font-weight:700;color:var(--text-hi);margin:12px 0 8px}
.step p{font-size:14.8px;color:var(--text-dim);line-height:1.8}
.step-index{font-size:12.5px;letter-spacing:.14em;color:var(--text-dim)}

/* 场景区块 */
.scene-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media(min-width:1024px){.scene-grid{grid-template-columns:7fr 5fr;gap:24px}}
.scene-lead{overflow:hidden;display:flex;flex-direction:column}
.scene-lead img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scene-lead .scene-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.scene-side{display:grid;gap:22px}
.scene-card{border-radius:var(--radius);border:1px solid var(--line-soft);background:var(--bg-elev);box-shadow:var(--shadow);padding:22px;transition:transform .22s ease,border-color .22s ease}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(123,243,227,.36)}
.scene-card h3{font-size:18px;font-weight:700;color:var(--text-hi);margin-bottom:8px}
.scene-card p{font-size:14.8px;color:var(--text-dim);line-height:1.85}
.scene-body h3{font-size:22px;font-weight:700;color:var(--text-hi)}
.scene-body p{font-size:15.2px;color:var(--text-dim);line-height:1.85}
.mini-list{display:grid;gap:8px;margin-top:6px}
.mini-list li{position:relative;padding-left:16px;font-size:14.5px;color:var(--text)}
.mini-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--brand-500)}

/* FAQ */
.faq-wrap{max-width:880px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--glass);backdrop-filter:blur(14px);margin-bottom:12px;overflow:hidden;transition:border-color .2s ease}
.faq-item:hover{border-color:rgba(123,243,227,.4)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 22px;font-size:17px;font-weight:600;color:var(--text-hi)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{position:relative;width:22px;height:22px;flex-shrink:0;border-radius:50%;border:1px solid var(--line);transition:transform .26s ease,border-color .26s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;top:50%;left:50%;background:var(--brand-300);border-radius:2px}
.faq-icon::before{width:11px;height:1.6px;transform:translate(-50%,-50%)}
.faq-icon::after{width:1.6px;height:11px;transform:translate(-50%,-50%)}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:rgba(123,243,227,.6)}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--text)}
.faq-a p{max-width:760px}

/* CTA 带 */
.cta-band{background:var(--bg-panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-inner{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;padding:56px 0}
@media(min-width:1024px){.cta-inner{grid-template-columns:1fr auto;padding:72px 0;gap:48px}}
.cta-inner h2{font-size:clamp(23px,2.4vw,31px);line-height:1.4;font-weight:700;color:var(--text-hi);margin-bottom:12px}
.cta-inner p{font-size:16px;color:var(--text-dim);max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* 展示条 */
.stat-strip{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);border-radius:var(--radius);overflow:hidden}
@media(min-width:768px){.stat-strip{grid-template-columns:repeat(4,1fr)}}
.stat-cell{background:var(--bg-panel);padding:24px 22px}
.stat-cell b{display:block;font-size:42px;line-height:1;font-weight:700;color:var(--accent-500);letter-spacing:-.02em}
.stat-cell span{display:block;margin-top:10px;font-size:14.5px;color:var(--text-dim);line-height:1.75}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-panel);border-top:1px solid var(--line);margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-top:56px;padding-bottom:56px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:32px;padding-top:72px;padding-bottom:72px}}
.footer-col h3{font-size:15px;font-weight:700;color:var(--text-hi);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:10px}
.footer-col ul a{font-size:14.5px;color:var(--text-dim)}
.footer-col ul a:hover{color:var(--brand-300)}
.footer-desc{font-size:14px;color:var(--text-dim);line-height:1.8;margin-top:16px;max-width:320px}
.footer-contact{font-size:14px;color:var(--text-dim);line-height:2;margin-top:16px}
.footer-contact b{color:var(--text)}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding-top:22px;padding-bottom:26px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--text-dim)}
.footer-bottom .dot{color:rgba(126,144,168,.5)}
.to-top{margin-left:auto;color:var(--text-dim)}
.to-top:hover{color:var(--brand-300)}

/* ============ 移动端底部行动条 ============ */
.mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;gap:10px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(6,12,24,.94);backdrop-filter:blur(16px);border-top:1px solid var(--line);opacity:0;visibility:hidden;transform:translateY(100%);transition:.32s ease}
.mobile-bar.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-bar .btn-ghost{flex:0 0 38%}
.mobile-bar .btn-primary{flex:1}
@media(min-width:1024px){.mobile-bar{display:none}}
@media(max-width:1023px){body{padding-bottom:76px}}

/* 入场动效 */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}
.to-top:focus-visible,.footer-col a:focus-visible,.drawer-link:focus-visible{outline:2px solid var(--brand-300);outline-offset:3px;border-radius:4px}

/* roulang page: category2 */
:root{
  --bg-deep:#060C18;
  --bg-panel:#0A1424;
  --bg-elev:#0F1D31;
  --brand-500:#2FD9C4;
  --brand-600:#16A899;
  --brand-300:#7BF3E3;
  --assist-500:#6E8BFF;
  --accent-500:#FFB86B;
  --text-hi:#E9F1FB;
  --text:#C3D1E4;
  --text-dim:#7E90A8;
  --line:rgba(140,190,255,.14);
  --line-soft:rgba(255,255,255,.07);
  --radius:18px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--bg-deep);
  color:var(--text);
  font-family:Inter,ui-sans-serif,system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 520px at 82% -12%,rgba(110,139,255,.10),transparent 68%),
    radial-gradient(760px 420px at 6% 4%,rgba(47,217,196,.09),transparent 70%);
  background-attachment:fixed;
}
img{max-width:100%;display:block;border-radius:14px}
a{color:inherit}
::selection{background:rgba(47,217,196,.32);color:#04231F}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-deep)}
::-webkit-scrollbar-thumb{background:rgba(47,217,196,.28);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(47,217,196,.45)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ---------- 顶部提示条 ---------- */
.top-strip{background:linear-gradient(90deg,rgba(47,217,196,.14),rgba(110,139,255,.12));border-bottom:1px solid var(--line)}
.top-strip-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding:9px 0;font-size:13px;color:var(--text-dim);letter-spacing:.02em}
.top-strip-inner b{color:var(--brand-300);font-weight:600}
.top-strip-inner a{color:var(--text);text-decoration:none;border-bottom:1px solid rgba(47,217,196,.4);padding-bottom:1px}
.top-strip-inner a:hover{color:var(--brand-300)}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:120;border-bottom:1px solid transparent;transition:background .28s ease,border-color .28s ease,box-shadow .28s ease}
.site-header.is-stuck{background:rgba(6,12,24,.84);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom-color:var(--line);box-shadow:0 12px 30px -22px rgba(0,0,0,.9)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.site-header .brand,.site-footer .brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--text-hi);flex:0 0 auto}
.brand-mark{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:rgba(47,217,196,.10);border:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}
.brand-text strong{display:block;font-size:18px;font-weight:700;line-height:1.2;letter-spacing:.01em}
.brand-text em{display:block;font-style:normal;font-size:12px;color:var(--text-dim);letter-spacing:.08em;line-height:1.4}
.main-nav{display:flex;align-items:center;gap:28px}
.main-nav .nav-link{position:relative;display:inline-block;padding:6px 0;color:var(--text);text-decoration:none;font-size:16px;font-weight:500;transition:color .18s ease}
.main-nav .nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--brand-500);transform:scaleX(0);transform-origin:left;transition:transform .18s ease}
.main-nav .nav-link:hover{color:var(--text-hi)}
.main-nav .nav-link:hover::after,.main-nav .nav-link.is-active::after{transform:scaleX(1)}
.main-nav .nav-link.is-active{color:var(--text-hi)}
.header-actions{display:flex;align-items:center;gap:12px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border:1px solid transparent;border-radius:999px;font-size:15px;font-weight:600;font-family:inherit;text-decoration:none;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background .2s ease,border-color .2s ease,color .2s ease}
.btn-primary{background:linear-gradient(180deg,var(--brand-500),var(--brand-600));color:#04231F;box-shadow:0 10px 34px -10px rgba(47,217,196,.55),inset 0 0 0 1px rgba(255,255,255,.25)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 14px 44px -10px rgba(47,217,196,.68),inset 0 0 0 1px rgba(255,255,255,.32)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--text-hi);backdrop-filter:blur(10px)}
.btn-ghost:hover{border-color:rgba(123,243,227,.55);background:rgba(47,217,196,.10);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px}

.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text-hi);align-items:center;justify-content:center;cursor:pointer}
.nav-toggle:hover{border-color:rgba(123,243,227,.5)}
.drawer{display:none;position:fixed;inset:72px 0 0;z-index:110;background:rgba(6,12,24,.98);backdrop-filter:blur(18px);padding:24px 20px 120px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .24s ease,transform .24s ease;overflow-y:auto}
.drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
.drawer a.drawer-link{display:block;padding:16px 4px;border-bottom:1px solid var(--line-soft);color:var(--text);text-decoration:none;font-size:18px;font-weight:600}
.drawer a.drawer-link.is-active{color:var(--brand-300)}
.drawer .drawer-actions{display:flex;gap:12px;margin-top:28px}
.drawer .drawer-actions .btn{flex:1 1 0}

@media (max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .drawer{display:block}
  .header-actions .btn-ghost,.header-actions .btn-cta{display:none}
}
@media (max-width:640px){
  .header-inner{height:64px}
  .brand-mark{width:36px;height:36px}
  .brand-text strong{font-size:16.5px}
  .brand-text em{font-size:11px;letter-spacing:.05em}
  .drawer{inset:64px 0 0}
}

/* ---------- 小 Hero ---------- */
.page-hero{position:relative;overflow:hidden;padding:54px 0 48px;text-align:center;background-image:linear-gradient(180deg,rgba(6,12,24,.74),rgba(6,12,24,.93)),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center}
.page-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;background:linear-gradient(180deg,transparent,var(--bg-deep));pointer-events:none}
.page-hero > .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:9px;font-size:13px;color:var(--text-dim);letter-spacing:.02em;margin-bottom:20px}
.crumb a{color:var(--text-dim);text-decoration:none;transition:color .18s ease}
.crumb a:hover{color:var(--brand-300)}
.crumb .sep{opacity:.5}
.crumb .current{color:var(--text-hi)}
.page-hero h1{margin:0 auto;max-width:900px;font-size:clamp(28px,4.4vw,48px);line-height:1.28;font-weight:700;letter-spacing:-.005em;color:var(--text-hi)}
.page-hero .hero-sub{margin:18px auto 0;max-width:720px;font-size:18px;line-height:1.8;color:var(--text-dim)}
.hero-badges{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:24px}
.badge{display:inline-flex;align-items:center;gap:7px;height:26px;padding:0 12px;border-radius:999px;font-size:13px;letter-spacing:.02em;border:1px solid rgba(47,217,196,.42);background:rgba(47,217,196,.08);color:var(--brand-300)}
.badge-accent{border-color:rgba(255,184,107,.45);background:rgba(255,184,107,.08);color:var(--accent-500)}
.badge-plain{border-color:var(--line);background:rgba(255,255,255,.03);color:var(--text-dim)}
.hero-btns{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:30px}

/* ---------- 锚点 chip 行 ---------- */
.chip-bar{position:sticky;top:72px;z-index:80;background:rgba(6,12,24,.88);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.chip-row{display:flex;gap:10px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.chip-row::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;padding:7px 15px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text);font-size:13.5px;text-decoration:none;white-space:nowrap;transition:all .2s ease}
.chip:hover{border-color:rgba(123,243,227,.5);color:var(--text-hi);background:rgba(47,217,196,.10);transform:translateY(-1px)}
.chip.is-on{background:rgba(47,217,196,.14);border-color:rgba(47,217,196,.5);color:var(--brand-300)}
@media (max-width:640px){.chip-bar{top:64px}}

/* ---------- 板块 ---------- */
.section{padding:60px 0}
@media (min-width:1024px){.section{padding:92px 0}}
.section-panel{background:var(--bg-panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px}
.section-head.center{margin:0 auto;text-align:center}
.eyebrow{display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.14em;color:var(--brand-300);margin-bottom:14px}
.eyebrow::before{content:"";width:12px;height:3px;border-radius:2px;background:var(--brand-500)}
.section-head.center .eyebrow{justify-content:center}
.section-head h2{margin:0;font-size:clamp(23px,2.6vw,34px);line-height:1.35;font-weight:700;color:var(--text-hi)}
.section-head p{margin:16px 0 0;font-size:16px;line-height:1.85;color:var(--text-dim)}

/* ---------- 玻璃与实底卡 ---------- */
.glass{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));border:1px solid var(--line);border-radius:var(--radius);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.08)}
.solid{background:var(--bg-elev);border:1px solid var(--line-soft);border-radius:var(--radius);box-shadow:var(--shadow-card)}

/* ---------- 核心能力长条 ---------- */
.capability{padding:22px 24px;display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width:640px){.capability{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.capability{grid-template-columns:repeat(4,1fr);gap:14px;padding:24px 28px}}
.cap-item{display:flex;align-items:flex-start;gap:12px;padding:6px 4px}
.cap-item + .cap-item{border-top:1px solid var(--line-soft);padding-top:18px}
@media (min-width:640px){
  .cap-item + .cap-item{border-top:0;padding-top:6px}
  .cap-item:nth-child(3),.cap-item:nth-child(4){border-top:1px solid var(--line-soft);padding-top:18px}
}
@media (min-width:1024px){
  .cap-item:nth-child(3),.cap-item:nth-child(4){border-top:0;padding-top:6px}
  .cap-item + .cap-item{border-left:1px solid var(--line-soft);padding-left:18px}
}
.cap-icon{flex:0 0 auto;width:38px;height:38px;display:grid;place-items:center;border-radius:11px;background:rgba(47,217,196,.12);border:1px solid rgba(47,217,196,.28);color:var(--brand-300);font-size:15px}
.cap-item strong{display:block;font-size:15.5px;color:var(--text-hi);font-weight:600;line-height:1.5}
.cap-item span{display:block;font-size:13.5px;color:var(--text-dim);line-height:1.7;margin-top:2px}

/* ---------- 方案筛选与网格 ---------- */
.filter-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:26px}
.filter-label{font-size:13px;color:var(--text-dim);letter-spacing:.08em;margin-right:4px}
.plan-grid{display:grid;gap:24px;grid-template-columns:1fr}
@media (min-width:640px){.plan-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.plan-grid{grid-template-columns:repeat(3,1fr)}}
.plan-card{position:relative;display:flex;flex-direction:column;padding:24px;border-radius:var(--radius);background:var(--bg-elev);border:1px solid var(--line-soft);box-shadow:var(--shadow-card);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease}
.plan-card:hover{transform:translateY(-4px);border-color:rgba(123,243,227,.35);box-shadow:0 24px 48px -26px rgba(0,0,0,.85),0 0 0 1px rgba(47,217,196,.18)}
.plan-card .plan-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
.plan-icon{width:46px;height:46px;display:grid;place-items:center;border-radius:13px;background:linear-gradient(180deg,rgba(47,217,196,.18),rgba(110,139,255,.10));border:1px solid rgba(47,217,196,.30);color:var(--brand-300);font-size:18px}
.plan-card h3{margin:0 0 10px;font-size:19px;font-weight:700;color:var(--text-hi);line-height:1.5}
.plan-card > p{margin:0 0 16px;font-size:15px;line-height:1.85;color:var(--text)}
.plan-points{list-style:none;margin:0 0 20px;padding:0;display:grid;gap:9px}
.plan-points li{position:relative;padding-left:18px;font-size:14.5px;line-height:1.75;color:var(--text-dim)}
.plan-points li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:2px;background:var(--brand-500);box-shadow:0 0 10px rgba(47,217,196,.5)}
.plan-more{margin-top:auto;display:inline-flex;align-items:center;gap:7px;font-size:14.5px;font-weight:600;color:var(--brand-300);text-decoration:none;width:fit-content;border-bottom:1px solid rgba(123,243,227,.32);padding-bottom:2px;transition:gap .2s ease,color .2s ease}
.plan-more:hover{gap:11px;color:#fff;border-bottom-color:rgba(255,255,255,.6)}

/* ---------- 流程 ---------- */
.flow{display:grid;gap:20px;grid-template-columns:1fr;margin-top:44px}
@media (min-width:768px){.flow{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.flow{grid-template-columns:repeat(4,1fr);gap:24px}}
.flow-step{position:relative;padding:24px 22px;border-radius:var(--radius);background:rgba(255,255,255,.03);border:1px solid var(--line-soft);transition:border-color .2s ease,background .2s ease}
.flow-step:hover{border-color:rgba(47,217,196,.35);background:rgba(47,217,196,.05)}
.flow-node{position:relative;width:34px;height:34px;border-radius:999px;display:grid;place-items:center;font-size:13px;font-weight:700;color:#04231F;background:linear-gradient(180deg,var(--brand-300),var(--brand-500));box-shadow:0 0 0 5px rgba(47,217,196,.12);margin-bottom:16px}
.flow-step h3{margin:0 0 8px;font-size:17px;font-weight:600;color:var(--text-hi)}
.flow-step p{margin:0;font-size:14.5px;line-height:1.8;color:var(--text-dim)}
.flow-line{display:none}
@media (min-width:1024px){
  .flow-line{display:block;position:absolute;left:0;right:0;top:41px;height:1px;background:linear-gradient(90deg,rgba(47,217,196,.5),rgba(110,139,255,.22),transparent)}
}

/* ---------- 适用场景 ---------- */
.scene-grid{display:grid;gap:28px;grid-template-columns:1fr;align-items:center}
@media (min-width:1024px){.scene-grid{grid-template-columns:5fr 7fr;gap:48px}}
.scene-figure{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.scene-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;border-radius:0}
.scene-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,12,24,.10),rgba(6,12,24,.72));pointer-events:none}
.scene-list{display:grid;gap:14px;margin-top:26px}
.scene-item{display:flex;gap:14px;padding:18px 20px;border-radius:15px;background:rgba(255,255,255,.03);border:1px solid var(--line-soft);transition:border-color .2s ease,transform .2s ease}
.scene-item:hover{border-color:rgba(123,243,227,.32);transform:translateX(3px)}
.scene-item i{color:var(--brand-300);font-size:16px;margin-top:4px}
.scene-item h4{margin:0 0 4px;font-size:16.5px;font-weight:600;color:var(--text-hi)}
.scene-item p{margin:0;font-size:14.5px;line-height:1.8;color:var(--text-dim)}
.scene-note{margin-top:26px;font-size:14px;color:var(--text-dim);display:flex;align-items:center;gap:9px}
.scene-note i{color:var(--accent-500)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:40px auto 0}
.faq-item{border-radius:14px;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));border:1px solid var(--line);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);margin-bottom:12px;overflow:hidden;transition:border-color .22s ease}
.faq-item:hover{border-color:rgba(123,243,227,.4)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:none;border:0;color:var(--text-hi);font-size:17px;font-weight:600;font-family:inherit;text-align:left;cursor:pointer;line-height:1.6}
.faq-icon{flex:0 0 auto;position:relative;width:26px;height:26px;border-radius:999px;border:1px solid rgba(47,217,196,.45);transition:transform .26s ease}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--brand-300);border-radius:2px;transform:translate(-50%,-50%)}
.faq-icon::before{width:11px;height:1.6px}
.faq-icon::after{width:1.6px;height:11px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-item.is-open .faq-a{max-height:340px}
.faq-a p{margin:0;padding:0 20px 20px;font-size:15px;line-height:1.9;color:var(--text)}

/* ---------- CTA 与表单 ---------- */
.cta-grid{display:grid;gap:28px;grid-template-columns:1fr}
@media (min-width:1024px){.cta-grid{grid-template-columns:5fr 7fr;gap:40px;align-items:start}}
.info-card{padding:26px}
.info-card h3{margin:0 0 16px;font-size:19px;font-weight:700;color:var(--text-hi)}
.info-list{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:14px}
.info-list li{display:flex;gap:12px;font-size:15px;line-height:1.75;color:var(--text)}
.info-list i{color:var(--brand-300);margin-top:5px;font-size:14px}
.info-list b{color:var(--text-hi);font-weight:600}
.form-card{padding:26px}
.form-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media (min-width:640px){.form-grid{grid-template-columns:repeat(2,1fr)}.form-grid .span-2{grid-column:span 2}}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;font-weight:500;color:var(--text-dim);letter-spacing:.02em;display:flex;align-items:center;gap:6px}
.field label .req{width:6px;height:6px;border-radius:999px;background:var(--accent-500);display:inline-block}
.field input,.field select,.field textarea{width:100%;height:48px;padding:0 14px;border-radius:12px;background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text-hi);font-size:15px;font-family:inherit;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease}
.field textarea{height:120px;padding:12px 14px;resize:vertical;line-height:1.75}
.field input::placeholder,.field textarea::placeholder{color:var(--text-dim)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand-300);box-shadow:0 0 0 3px rgba(47,217,196,.18);background:rgba(255,255,255,.06)}
.form-status{margin-top:14px;font-size:14px;min-height:20px;color:var(--brand-300)}
.form-status.is-err{color:#FF9B9B}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-panel);border-top:1px solid var(--line);padding:60px 0 0;margin-top:20px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr}}
.footer-brand .brand{margin-bottom:16px}
.footer-desc{font-size:14.5px;line-height:1.85;color:var(--text-dim);margin:0 0 16px;max-width:320px}
.footer-contact{font-size:14px;line-height:1.9;color:var(--text-dim);margin:0}
.footer-contact b{color:var(--text);font-weight:600}
.footer-col h3{margin:0 0 16px;font-size:15px;font-weight:600;color:var(--text-hi);letter-spacing:.02em}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.footer-col ul a{font-size:14.5px;color:var(--text-dim);text-decoration:none;transition:color .18s ease,padding-left .18s ease}
.footer-col ul a:hover{color:var(--brand-300);padding-left:3px}
.footer-bottom{margin-top:48px;padding:20px 0 26px;border-top:1px solid var(--line-soft);display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;color:var(--text-dim);letter-spacing:.02em}
.footer-bottom .dot{opacity:.45;font-size:8px}
.footer-bottom .to-top{margin-left:auto;color:var(--text-dim);text-decoration:none;transition:color .18s ease}
.footer-bottom .to-top:hover{color:var(--brand-300)}

/* ---------- 移动端行动条 ---------- */
.mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:130;display:flex;gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(6,12,24,.92);backdrop-filter:blur(16px);border-top:1px solid var(--line);opacity:0;transform:translateY(100%);pointer-events:none;transition:opacity .28s ease,transform .28s ease}
.mobile-bar.is-show{opacity:1;transform:translateY(0);pointer-events:auto}
.mobile-bar .btn{height:48px}
.mobile-bar .btn-ghost{flex:0 0 40%}
.mobile-bar .btn-primary{flex:1 1 60%}
@media (min-width:1024px){.mobile-bar{display:none}}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s ease,transform .4s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation:none !important}
}

/* roulang page: category3 */
:root{
  --bg-deep:#060C18;
  --bg-panel:#0A1424;
  --bg-elev:#0F1D31;
  --brand-500:#2FD9C4;
  --brand-600:#16A899;
  --brand-300:#7BF3E3;
  --assist-500:#6E8BFF;
  --accent-500:#FFB86B;
  --text-hi:#E9F1FB;
  --text:#C3D1E4;
  --text-dim:#7E90A8;
  --line:rgba(140,190,255,.14);
  --line-soft:rgba(255,255,255,.07);
  --radius:18px;
  --radius-sm:14px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --glow:0 10px 34px -10px rgba(47,217,196,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--bg-deep);
  background-image:
    radial-gradient(1100px 620px at 82% -12%, rgba(47,217,196,.10), transparent 62%),
    radial-gradient(880px 520px at -6% 26%, rgba(110,139,255,.09), transparent 60%);
  color:var(--text);
  font-family:Inter,'PingFang SC','Microsoft YaHei',ui-sans-serif,system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--text-hi);margin:0;font-weight:700;letter-spacing:-.005em}
h1{font-size:clamp(30px,4.6vw,50px);line-height:1.28}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.35}
h3{font-size:20px;line-height:1.5;font-weight:700}
h4{font-size:17px;line-height:1.6;font-weight:600}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums}
::selection{background:rgba(47,217,196,.28);color:#fff}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px;border-radius:6px}

body::-webkit-scrollbar{width:10px}
body::-webkit-scrollbar-track{background:var(--bg-deep)}
body::-webkit-scrollbar-thumb{background:rgba(47,217,196,.28);border-radius:8px}

body .container{width:100%;max-width:1240px;margin:0 auto;padding-left:20px;padding-right:20px}
@media (min-width:768px){ body .container{padding-left:32px;padding-right:32px} }

.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand-500);color:#04231F;padding:10px 16px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),filter .22s var(--ease),color .22s var(--ease);
}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-primary{
  background:linear-gradient(180deg,var(--brand-500),var(--brand-600));
  color:#04231F;
  box-shadow:var(--glow),inset 0 0 0 1px rgba(255,255,255,.25);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 14px 44px -8px rgba(47,217,196,.62),inset 0 0 0 1px rgba(255,255,255,.32)}
.btn-primary:active{transform:translateY(0);filter:brightness(.98)}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--line);
  color:var(--text-hi);
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{border-color:var(--brand-300);background:rgba(47,217,196,.09);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn i{font-size:13px}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:90;
  transition:background-color .3s var(--ease),backdrop-filter .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background-color:rgba(6,12,24,.82);
  backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
  box-shadow:0 14px 34px -26px rgba(0,0,0,.9);
}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(160deg,rgba(47,217,196,.22),rgba(110,139,255,.14));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:18px;font-weight:700;color:var(--text-hi);letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-dim);letter-spacing:.04em}

.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{
  position:relative;font-size:16px;font-weight:500;color:var(--text);
  padding:6px 0;transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand-500),var(--brand-300));
  transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--text-hi)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text-hi)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-cta{display:flex;align-items:center;gap:12px;flex-shrink:0}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);cursor:pointer;padding:0;place-items:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-hi);margin:3px auto;transition:transform .2s var(--ease),opacity .2s var(--ease)}

/* 移动端抽屉 */
.drawer{
  position:fixed;inset:0;z-index:120;background:rgba(6,12,24,.98);
  backdrop-filter:blur(8px);
  display:flex;flex-direction:column;padding:20px;
  transform:translateX(100%);transition:transform .28s var(--ease);
}
.drawer.is-open{transform:translateX(0)}
.drawer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(600px 300px at 80% 0%,rgba(47,217,196,.14),transparent 65%);
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;position:relative;z-index:1}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--text-hi);font-size:18px;cursor:pointer}
.drawer-nav{display:flex;flex-direction:column;margin-top:36px;position:relative;z-index:1}
.drawer-nav a{font-size:18px;color:var(--text);padding:16px 0;border-bottom:1px solid var(--line-soft)}
.drawer-nav a.is-active{color:var(--brand-300)}
.drawer-foot{margin-top:auto;display:flex;gap:12px;position:relative;z-index:1}
.drawer-foot .btn{flex:1}

@media (max-width:1023px){
  .main-nav{display:none}
  .header-cta .btn-ghost{display:none}
  .nav-toggle{display:grid}
  .header-inner{gap:14px;justify-content:space-between;height:66px}
}
@media (max-width:520px){
  .header-cta .btn-primary{display:none}
}

/* ============ Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:58px 0 40px;
  background-image:linear-gradient(180deg,rgba(6,12,24,.62),rgba(6,12,24,.94)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line-soft);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(90deg,rgba(47,217,196,.10) 1px,transparent 1px);
  background-size:120px 100%;opacity:.35;
}
.hero-inner{position:relative;z-index:2;max-width:900px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-dim);letter-spacing:.02em;margin-bottom:16px}
.breadcrumb a{color:var(--text-dim);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--brand-300)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--text-hi)}
.hero-inner h1{max-width:16em}
.hero-lead{margin-top:18px;font-size:18px;line-height:1.8;color:var(--text-dim);max-width:34em}
.hero-flow{display:flex;align-items:center;gap:14px;margin-top:30px;flex-wrap:wrap}
.flow-node{display:flex;flex-direction:column;gap:4px;line-height:1.4}
.flow-node b{font-size:15px;color:var(--text-hi);font-weight:600}
.flow-node em{font-style:normal;font-size:13px;color:var(--text-dim)}
.flow-dot{
  width:12px;height:12px;border-radius:50%;display:block;margin-bottom:8px;
  background:var(--bg-elev);border:1px solid var(--line);
}
.flow-node.is-on .flow-dot{background:var(--brand-500);border-color:var(--brand-300);box-shadow:0 0 0 4px rgba(47,217,196,.16),0 0 18px rgba(47,217,196,.6)}
.flow-line{flex:1;min-width:40px;height:1px;background:linear-gradient(90deg,rgba(47,217,196,.7),rgba(47,217,196,.06));margin-bottom:28px}

/* 吸顶 chip 行 */
.chipbar{
  position:sticky;top:66px;z-index:60;
  background:rgba(6,12,24,.86);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.chipbar-inner{display:flex;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.chipbar-inner::-webkit-scrollbar{display:none}
.chip{
  flex-shrink:0;height:34px;padding:0 16px;border-radius:999px;
  display:inline-flex;align-items:center;font-size:14px;color:var(--text);
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:all .2s var(--ease);white-space:nowrap;
}
.chip:hover{border-color:var(--brand-300);color:var(--text-hi);background:rgba(47,217,196,.08)}
.chip.is-on{border-color:rgba(47,217,196,.6);background:rgba(47,217,196,.12);color:var(--brand-300)}
@media (min-width:1024px){ .chipbar{top:72px} }

/* ============ 通用板块 ============ */
.section{padding:56px 0}
@media (min-width:1024px){ .section{padding:80px 0} }
.section-head{max-width:760px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{margin-top:12px}
.section-head p{margin-top:14px;font-size:16.5px;color:var(--text-dim)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--brand-300);text-transform:uppercase;
}
.eyebrow::before{content:"";width:12px;height:3px;border-radius:2px;background:var(--brand-500);display:block}

/* 玻璃条 */
.glass-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);
  backdrop-filter:blur(16px);box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.1);
  padding:26px 28px;
}
.strip-item{display:flex;gap:14px;align-items:flex-start}
.strip-icon{
  width:42px;height:42px;border-radius:12px;flex-shrink:0;display:grid;place-items:center;
  background:rgba(47,217,196,.1);border:1px solid rgba(47,217,196,.3);color:var(--brand-300);font-size:16px;
}
.strip-item h4{font-size:16px}
.strip-item p{font-size:14.5px;color:var(--text-dim);margin-top:4px;line-height:1.7}
@media (max-width:1023px){ .glass-strip{grid-template-columns:repeat(2,1fr);gap:22px} }
@media (max-width:560px){ .glass-strip{grid-template-columns:1fr;padding:20px} }

/* ============ 时间轴 ============ */
.timeline{position:relative;max-width:900px;margin:0 auto}
.timeline::before{
  content:"";position:absolute;left:27px;top:14px;bottom:34px;width:2px;
  background:linear-gradient(180deg,rgba(47,217,196,.9),rgba(110,139,255,.28) 55%,rgba(47,217,196,0));
}
.step{position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);gap:28px;padding-bottom:36px}
.step:last-child{padding-bottom:0}
.step-node{
  width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(180deg,var(--bg-elev),#0b1a2c);
  border:1px solid rgba(47,217,196,.4);
  box-shadow:0 0 0 6px rgba(47,217,196,.06),0 0 22px -4px rgba(47,217,196,.5);
  font-size:16px;font-weight:700;color:var(--brand-300);
  font-variant-numeric:tabular-nums;
}
.step-card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);
  backdrop-filter:blur(16px);box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.08);
  padding:26px 28px;transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.step-card:hover{border-color:rgba(47,217,196,.35);transform:translateY(-2px)}
.step-card h3{font-size:19px}
.step-card > p{margin-top:10px;font-size:16px;color:var(--text)}
.step-tag{
  display:inline-block;margin-bottom:12px;height:24px;line-height:22px;padding:0 12px;border-radius:999px;
  font-size:12.5px;color:var(--brand-300);border:1px solid rgba(47,217,196,.35);background:rgba(47,217,196,.08);
}
.step-tag.warm{color:var(--accent-500);border-color:rgba(255,184,107,.4);background:rgba(255,184,107,.08)}
.mini-list{margin-top:14px;display:grid;gap:8px}
.mini-list li{position:relative;padding-left:18px;font-size:15px;color:var(--text-dim);line-height:1.8}
.mini-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--brand-500)}
.step-figure{margin:18px 0 0}
.step-figure img{width:100%;border-radius:var(--radius-sm);border:1px solid var(--line-soft);aspect-ratio:16/10;object-fit:cover}
.step-figure figcaption{margin-top:10px;font-size:13px;color:var(--text-dim);text-align:center}
@media (max-width:640px){
  .timeline::before{left:21px}
  .step{grid-template-columns:44px minmax(0,1fr);gap:16px;padding-bottom:28px}
  .step-node{width:44px;height:44px;font-size:14px}
  .step-card{padding:20px}
}

/* ============ 图文分栏 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split-media img{width:100%;border-radius:var(--radius);border:1px solid var(--line-soft);aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow-card)}
.check-list{margin-top:24px;display:grid;gap:14px}
.check-list li{
  display:grid;grid-template-columns:28px minmax(0,1fr);gap:14px;align-items:start;
  padding:16px 18px;border-radius:var(--radius-sm);
  background:rgba(15,29,49,.7);border:1px solid var(--line-soft);
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.check-list li:hover{border-color:rgba(47,217,196,.32);transform:translateX(3px)}
.check-list .ck{
  width:28px;height:28px;border-radius:9px;display:grid;place-items:center;
  background:rgba(47,217,196,.12);border:1px solid rgba(47,217,196,.34);color:var(--brand-300);font-size:12px;
}
.check-list b{display:block;font-size:16px;color:var(--text-hi);font-weight:600}
.check-list span{font-size:14.5px;color:var(--text-dim);line-height:1.75}
@media (max-width:900px){ .split{grid-template-columns:1fr;gap:30px} }

/* ============ FAQ ============ */
.faq-layout{display:grid;grid-template-columns:minmax(0,860px) 300px;gap:40px;justify-content:center;align-items:start}
.faq-item{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius-sm);
  backdrop-filter:blur(14px);margin-bottom:12px;overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item:hover{border-color:rgba(123,243,227,.4)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:none;border:0;cursor:pointer;text-align:left;
  padding:18px 22px;font-size:17px;font-weight:600;color:var(--text-hi);line-height:1.6;
}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;position:relative;
  border:1px solid var(--line);transition:transform .26s var(--ease),border-color .26s var(--ease),background-color .26s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--brand-300);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:1.5px}
.faq-icon::after{width:1.5px;height:11px}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:rgba(47,217,196,.5);background:rgba(47,217,196,.12)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s var(--ease)}
.faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--text)}
.faq-a-inner p + p{margin-top:10px}
.faq-side{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);backdrop-filter:blur(14px);
  padding:24px;box-shadow:var(--shadow-card);
}
.faq-side h3{font-size:18px}
.faq-side p{margin-top:10px;font-size:14.5px;color:var(--text-dim);line-height:1.8}
.faq-side .btn{width:100%;margin-top:18px}
@media (max-width:1023px){
  .faq-layout{grid-template-columns:1fr;gap:26px}
  .faq-side{order:2}
}

/* ============ 相关入口 ============ */
.entry-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
.entry-card{
  display:flex;flex-direction:column;gap:12px;
  padding:26px 24px;border-radius:var(--radius);
  background:var(--bg-elev);border:1px solid var(--line-soft);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.entry-card:hover{transform:translateY(-4px);border-color:rgba(47,217,196,.4);box-shadow:var(--shadow-card),0 0 0 1px rgba(47,217,196,.18)}
.entry-card h3{font-size:19px}
.entry-card p{font-size:15px;color:var(--text-dim);line-height:1.8}
.entry-more{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--brand-300)}
.entry-card .tag{
  align-self:flex-start;font-size:12.5px;padding:2px 10px;border-radius:999px;
  border:1px solid var(--line);color:var(--text-dim);
}
@media (max-width:1023px){ .entry-grid{grid-template-columns:1fr 1fr} }
@media (max-width:640px){ .entry-grid{grid-template-columns:1fr} }

/* ============ CTA 带 ============ */
.cta-band{
  background:var(--bg-panel);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:56px 0;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap}
.cta-inner h2{max-width:20em}
.cta-inner p{margin-top:12px;font-size:16px;color:var(--text-dim);max-width:38em}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
@media (min-width:1024px){ .cta-band{padding:72px 0} }

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-panel);border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-col h3{font-size:16px;color:var(--text-hi);margin-bottom:18px;font-weight:600}
.footer-col ul{display:grid;gap:11px}
.footer-col ul a{font-size:15px;color:var(--text-dim);transition:color .18s var(--ease)}
.footer-col ul a:hover{color:var(--brand-300)}
.footer-brand .brand{margin-bottom:16px}
.footer-desc{font-size:14.5px;color:var(--text-dim);line-height:1.8;max-width:30em}
.footer-contact{margin-top:16px;font-size:14.5px;color:var(--text-dim);line-height:1.9}
.footer-contact b{color:var(--text);font-weight:600}
.footer-bottom{
  margin-top:48px;padding:20px 20px 28px;border-top:1px solid var(--line-soft);
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:12px;color:var(--text-dim);
}
.footer-bottom .dot{font-size:7px;color:rgba(126,144,168,.6)}
.footer-bottom .to-top{margin-left:auto;color:var(--text-dim);transition:color .18s var(--ease)}
.footer-bottom .to-top:hover{color:var(--brand-300)}
@media (max-width:1023px){ .footer-grid{grid-template-columns:1fr 1fr} }
@media (max-width:600px){ .footer-grid{grid-template-columns:1fr} .site-footer{padding-top:44px} }

/* ============ 移动端底部行动条 ============ */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:80;
  display:none;gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(6,12,24,.92);backdrop-filter:blur(16px);border-top:1px solid var(--line);
  transform:translateY(120%);opacity:0;transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.mobile-bar.is-show{transform:translateY(0);opacity:1}
.mobile-bar .btn-ghost{flex:0 0 34%}
.mobile-bar .btn-primary{flex:1}
@media (max-width:640px){ .mobile-bar{display:flex} body{padding-bottom:76px} }

/* ============ 入场动效 ============ */
[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
[data-reveal].in-view{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  [data-reveal]{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --bg-deep:#060C18;
  --bg-panel:#0A1424;
  --bg-elev:#0F1D31;
  --brand-500:#2FD9C4;
  --brand-600:#16A899;
  --brand-300:#7BF3E3;
  --assist-500:#6E8BFF;
  --accent-500:#FFB86B;
  --text-hi:#E9F1FB;
  --text:#C3D1E4;
  --text-dim:#7E90A8;
  --line:rgba(140,190,255,.14);
  --line-soft:rgba(255,255,255,.07);
  --radius:18px;
  --radius-sm:12px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.75);
  --header-h:72px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-deep);
  color:var(--text);
  font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:14px}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand-300);outline-offset:2px;border-radius:6px}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-deep)}
::-webkit-scrollbar-thumb{background:rgba(47,217,196,.28);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:rgba(47,217,196,.42)}

.container{max-width:1240px;margin:0 auto;padding:0 20px;width:100%}
@media (min-width:768px){ .container{padding:0 32px} }

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .glow-line::after{animation:none !important}
}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(6,12,24,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:var(--header-h)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(180deg,rgba(47,217,196,.16),rgba(110,139,255,.08));
  border:1px solid var(--line);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:18px;font-weight:700;color:var(--text-hi);letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-dim);letter-spacing:.04em}

.main-nav{display:none;align-items:center;gap:28px;margin-left:auto}
.main-nav .nav-link{
  position:relative;font-size:16px;font-weight:500;color:var(--text);
  padding:6px 0;transition:color .18s ease;white-space:nowrap;
}
.main-nav .nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.main-nav .nav-link:hover{color:var(--text-hi)}
.main-nav .nav-link:hover::after{transform:scaleX(1)}
.main-nav .nav-link.is-active{color:var(--text-hi)}
.main-nav .nav-link.is-active::after{transform:scaleX(1)}

.header-actions{display:none;align-items:center;gap:12px;flex-shrink:0}
.nav-toggle{
  margin-left:auto;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(255,255,255,.04);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-hi);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-hi);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

@media (min-width:1024px){
  .main-nav{display:flex}
  .header-actions{display:flex}
  .nav-toggle{display:none}
}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;background:rgba(6,12,24,.98);
  display:flex;flex-direction:column;padding:22px 20px 0;
  transform:translateY(-100%);opacity:0;pointer-events:none;transition:transform .3s ease,opacity .3s ease;
}
.drawer.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;font-size:20px;color:var(--text-hi)}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  display:block;padding:16px 4px;font-size:17px;font-weight:500;color:var(--text);
  border-bottom:1px solid var(--line-soft);
}
.drawer-nav a.is-active{color:var(--brand-300)}
.drawer-foot{
  margin-top:auto;display:flex;gap:12px;padding:20px 0 28px;
  border-top:1px solid var(--line-soft);
}
.drawer-foot .btn{flex:1}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:linear-gradient(135deg,var(--brand-600),var(--brand-500));
  color:#04231F;
  box-shadow:0 10px 34px -10px rgba(47,217,196,.55), inset 0 0 0 1px rgba(255,255,255,.25);
}
.btn-primary:hover{
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 14px 44px -10px rgba(47,217,196,.7), inset 0 0 0 1px rgba(255,255,255,.3);
}
.btn-primary:active{transform:translateY(-1px)}
.btn-ghost{
  background:rgba(255,255,255,.03);
  border:1px solid var(--line);
  color:var(--text-hi);
}
.btn-ghost:hover{
  border-color:var(--brand-300);
  background:rgba(47,217,196,.06);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(-1px)}
.btn-block{width:100%}

/* ---------- 页面小横幅 ---------- */
.page-hero{
  position:relative;
  min-height:240px;
  display:flex;align-items:center;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,12,24,.72),rgba(6,12,24,.9) 70%,rgba(6,12,24,.98));
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 18% 30%, rgba(47,217,196,.16), transparent 42%),
    radial-gradient(circle at 82% 70%, rgba(110,139,255,.12), transparent 46%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.02em;color:var(--text-dim);margin-bottom:16px;
}
.breadcrumb a{color:var(--text-dim);transition:color .18s ease}
.breadcrumb a:hover{color:var(--brand-300)}
.breadcrumb .sep{opacity:.55}
.breadcrumb .current{color:var(--text-hi)}

.page-hero h1{
  font-size:clamp(30px,4.6vw,50px);
  font-weight:700;line-height:1.28;letter-spacing:-.005em;
  color:var(--text-hi);max-width:22ch;
}
.page-hero .hero-sub{
  margin-top:14px;max-width:60ch;
  font-size:17px;line-height:1.8;color:var(--text);
}
@media (min-width:768px){ .page-hero .hero-sub{font-size:18px} }

/* ---------- 锚点 chip 行 ---------- */
.chip-row{
  position:sticky;top:var(--header-h);z-index:40;
  background:rgba(6,12,24,.9);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.chip-row-inner{display:flex;gap:10px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.chip-row-inner::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  font-size:13.5px;color:var(--text);white-space:nowrap;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.chip:hover{border-color:var(--brand-300);color:var(--text-hi);background:rgba(47,217,196,.08)}

/* ---------- 区块 ---------- */
.section{padding:64px 0;position:relative}
@media (min-width:1024px){ .section{padding:96px 0} }
.section-panel{background:var(--bg-panel)}
.section-title{
  font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.35;color:var(--text-hi);letter-spacing:-.004em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--brand-300);
  text-transform:none;margin-bottom:14px;
}
.eyebrow::before{content:"";width:12px;height:3px;border-radius:2px;background:var(--brand-500)}
.section-desc{margin-top:16px;font-size:16px;line-height:1.85;color:var(--text);max-width:66ch}
.muted{color:var(--text-dim);font-size:14.5px;line-height:1.8}

/* ---------- 卡片 ---------- */
.glass-card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card), inset 0 1px 0 rgba(255,255,255,.09);
  border-radius:var(--radius);
  padding:24px;
}
@media (min-width:1024px){ .glass-card{padding:28px} }
.solid-card{
  background:var(--bg-elev);
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  padding:24px;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
@media (min-width:1024px){ .solid-card{padding:28px} }
.solid-card:hover{border-color:rgba(123,243,227,.32);transform:translateY(-3px);box-shadow:0 20px 44px -28px rgba(0,0,0,.9)}

/* ---------- 帮助中心两栏（5/7） ---------- */
.help-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:1024px){
  .help-grid{grid-template-columns:5fr 7fr;gap:48px}
}
.help-aside-figure{margin-bottom:22px;overflow:hidden;border-radius:14px;border:1px solid var(--line-soft)}
.help-aside-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.mini-list{margin-top:22px;display:flex;flex-direction:column;gap:12px}
.mini-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;line-height:1.8;color:var(--text)}
.mini-list li::before{
  content:"";flex-shrink:0;width:6px;height:6px;margin-top:9px;border-radius:2px;background:var(--brand-500);
}
.aside-contact{
  margin-top:24px;padding-top:22px;border-top:1px solid var(--line-soft);
  display:flex;flex-direction:column;gap:10px;
}
.aside-contact .row{display:flex;justify-content:space-between;gap:12px;font-size:14px}
.aside-contact .row b{color:var(--text-hi);font-weight:600}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:14px;
  overflow:hidden;transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:rgba(123,243,227,.4)}
.faq-item[open]{border-color:rgba(47,217,196,.4);background:linear-gradient(180deg,rgba(47,217,196,.07),rgba(255,255,255,.02))}
.faq-q{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;
  font-size:17px;font-weight:600;line-height:1.6;color:var(--text-hi);
}
.faq-q::-webkit-details-marker{display:none}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:999px;
  border:1px solid var(--line);display:grid;place-items:center;
  color:var(--brand-300);transition:transform .26s ease,border-color .26s ease;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);border-color:var(--brand-300)}
.faq-a{
  padding:0 20px 20px;font-size:15px;line-height:1.9;color:var(--text);
}
.faq-a strong{color:var(--brand-300);font-weight:600}

/* ---------- 对比说明表 ---------- */
.table-card{padding:0;overflow:hidden}
.table-head{padding:24px 24px 8px}
.table-head h3{font-size:20px;font-weight:700;color:var(--text-hi)}
.table-wrap{overflow-x:auto;padding:8px 12px 20px}
table.compare{
  width:100%;border-collapse:separate;border-spacing:0;
  min-width:640px;font-size:14.5px;
}
table.compare caption{
  caption-side:top;text-align:left;padding:0 12px 12px;
  font-size:13px;color:var(--text-dim);letter-spacing:.02em;
}
table.compare th,table.compare td{
  text-align:left;padding:14px 16px;border-bottom:1px solid var(--line-soft);vertical-align:top;line-height:1.75;
}
table.compare thead th{
  font-size:13px;font-weight:600;color:var(--text-hi);letter-spacing:.03em;
  background:rgba(255,255,255,.05);border-bottom:1px solid var(--line);
}
table.compare tbody tr:nth-child(odd){background:rgba(255,255,255,.025)}
table.compare tbody tr:hover{background:rgba(47,217,196,.06)}
table.compare td:first-child{color:var(--text-hi);font-weight:600;width:30%}
table.compare td.self{color:var(--text)}
table.compare td.help{color:var(--text)}
table.compare td.help::before{
  content:"";display:inline-block;width:6px;height:6px;border-radius:2px;background:var(--accent-500);
  margin-right:8px;vertical-align:middle;
}

/* ---------- 常见疑问入口小卡 ---------- */
.quick-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:40px}
@media (min-width:768px){ .quick-grid{grid-template-columns:1.4fr 1fr 1fr} }
.quick-card{
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;gap:12px;
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.quick-card:hover{border-color:rgba(123,243,227,.38);transform:translateY(-4px);box-shadow:0 22px 48px -30px rgba(0,0,0,.95)}
.quick-card h3{font-size:18px;font-weight:700;color:var(--text-hi)}
.quick-card p{font-size:14.5px;line-height:1.85;color:var(--text)}
.quick-card .go{
  margin-top:auto;font-size:14px;font-weight:600;color:var(--brand-300);
  display:inline-flex;align-items:center;gap:6px;
}
.quick-card .go:hover{color:var(--brand-100,#CFFAF4)}
.quick-card.featured{
  background:linear-gradient(160deg,rgba(47,217,196,.14),rgba(110,139,255,.06) 70%,rgba(255,255,255,.02));
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:13px;letter-spacing:.01em;border:1px solid var(--line);color:var(--text);
}
.badge-brand{border-color:rgba(47,217,196,.5);background:rgba(47,217,196,.08);color:var(--brand-300)}
.badge-accent{border-color:rgba(255,184,107,.5);background:rgba(255,184,107,.08);color:var(--accent-500)}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--bg-panel);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-inner{
  display:grid;grid-template-columns:1fr;gap:28px;align-items:center;
  padding:56px 0;
}
@media (min-width:1024px){
  .cta-inner{grid-template-columns:1fr auto;gap:48px;padding:72px 0}
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (max-width:479px){ .cta-actions{flex-direction:column} .cta-actions .btn{width:100%} }
.cta-meta{
  display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:18px;font-size:14px;color:var(--text-dim);
}
.cta-meta b{color:var(--text-hi);font-weight:600}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-panel);border-top:1px solid var(--line);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr)} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr} }
.footer-col h3{font-size:15px;font-weight:700;color:var(--text-hi);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14.5px;color:var(--text-dim);transition:color .18s ease}
.footer-col ul a:hover{color:var(--brand-300)}
.footer-desc{font-size:14.5px;line-height:1.85;color:var(--text-dim);margin-top:16px;max-width:34ch}
.footer-contact{margin-top:16px;font-size:14px;line-height:1.9;color:var(--text-dim)}
.footer-contact b{color:var(--text-hi);font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;
  padding:22px 20px;margin-top:44px;border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--text-dim);letter-spacing:.02em;
}
@media (min-width:768px){ .footer-bottom{padding:22px 32px} }
.footer-bottom .dot{font-size:8px;color:var(--brand-500);opacity:.7}
.footer-bottom .to-top{
  margin-left:auto;color:var(--text-dim);border:1px solid var(--line);
  border-radius:999px;padding:5px 12px;transition:color .18s ease,border-color .18s ease;
}
.footer-bottom .to-top:hover{color:var(--brand-300);border-color:var(--brand-300)}

/* ---------- 移动底栏 ---------- */
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;gap:12px;align-items:center;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(6,12,24,.94);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  transform:translateY(110%);opacity:0;pointer-events:none;
  transition:transform .3s ease,opacity .3s ease;
}
.mobile-bar.is-visible{transform:translateY(0);opacity:1;pointer-events:auto}
.mobile-bar .btn-ghost{flex:0 0 38%}
.mobile-bar .btn-primary{flex:1 1 auto}
@media (min-width:1024px){ .mobile-bar{display:none} }
body.has-mobile-bar{padding-bottom:76px}
@media (min-width:1024px){ body.has-mobile-bar{padding-bottom:0} }

/* ---------- 装饰细线 ---------- */
.glow-line{position:relative;height:1px;background:var(--line);overflow:hidden;border-radius:2px}
.glow-line::after{
  content:"";position:absolute;top:0;left:-30%;width:30%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(47,217,196,.75),transparent);
  animation:flow 9s linear infinite;
}
@keyframes flow{0%{left:-30%}100%{left:100%}}

.anchor-target{scroll-margin-top:150px}