/* roulang page: index */
:root{
  --ink-950:#080D1A;
  --ink-900:#0D1428;
  --ink-800:#151D38;
  --ink-700:#1E2947;
  --line:rgba(139,166,255,.14);
  --line-strong:rgba(139,166,255,.28);
  --brand-500:#23D3B8;
  --brand-600:#12A693;
  --brand-glow:rgba(35,211,184,.45);
  --amber-500:#D98A4E;
  --amber-700:#8E5630;
  --lime-400:#D8F35A;
  --text-1:#EAEFF9;
  --text-2:#A6B2CB;
  --text-3:#6B7896;
  --ok:#3ECF8E;
  --warn:#E9A03B;
  --err:#E4574C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.9);
  --inner-line:inset 0 1px 0 rgba(255,255,255,.06);
  --gap-section:96px;
  --font-sans:"HarmonyOS Sans","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Barlow Condensed","HarmonyOS Sans","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(120% 60% at 82% -8%,rgba(35,211,184,.10),transparent 62%),
    radial-gradient(90% 50% at 8% 4%,rgba(217,138,78,.08),transparent 60%);
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease,opacity .18s ease;}
a:hover{color:#4fe3cb;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand-500);
  outline-offset:2px;
  border-radius:var(--r-sm);
}
::selection{background:rgba(35,211,184,.3);color:#fff;}

.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;}
.grid-container.full{max-width:100%;padding:0;}

/* ---------- 通用排版 ---------- */
h1,h2,h3,h4{color:var(--text-1);font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(32px,5vw,58px);font-weight:800;line-height:1.1;letter-spacing:-.02em;}
h2{font-size:clamp(24px,3vw,38px);line-height:1.22;}
h3{font-size:22px;line-height:1.35;}
h4{font-size:17px;font-weight:600;line-height:1.45;}
p{max-width:42em;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.14em;
  color:var(--brand-500);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand-500);opacity:.7;}
.lead{font-size:17px;color:var(--text-2);line-height:1.8;}
.muted{color:var(--text-3);font-size:13px;}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

.section{padding:var(--gap-section) 0;position:relative;z-index:1;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:48px;}
.section-head h2{max-width:20em;}
.section-head p{color:var(--text-2);margin-top:10px;font-size:16px;}
.section-alt{background:linear-gradient(180deg,rgba(8,13,26,.7),rgba(13,20,40,.2));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn i{font-size:14px;}
.btn-primary{background:var(--brand-500);color:#04231E;box-shadow:0 0 0 rgba(35,211,184,0);}
.btn-primary:hover{background:#2ee0c4;color:#04231E;transform:translateY(-1px);box-shadow:0 0 18px var(--brand-glow);}
.btn-primary:active{transform:translateY(0);filter:brightness(.94);}
.btn-ghost{background:rgba(139,166,255,.04);border-color:var(--line-strong);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-500);transform:translateY(-1px);}
.btn-amber{border-color:rgba(217,138,78,.4);color:var(--amber-500);background:rgba(217,138,78,.06);}
.btn-amber:hover{color:#f0ab70;border-color:var(--amber-500);transform:translateY(-1px);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-lg{padding:17px 34px;font-size:16px;}
.btn-block{width:100%;}

.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand-500);}
.link-more span{transition:transform .18s ease;}
.link-more:hover span{transform:translateX(4px);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:500;line-height:1.5;
  border:1px solid transparent;
}
.badge-brand{color:var(--brand-500);border-color:rgba(35,211,184,.3);background:rgba(35,211,184,.06);}
.badge-amber{color:var(--amber-500);border-color:rgba(217,138,78,.3);background:rgba(217,138,78,.06);}
.badge-plain{color:var(--text-2);border-color:var(--line-strong);background:rgba(139,166,255,.05);}

.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  font-size:13px;color:var(--text-2);
  background:rgba(21,29,56,.6);
  transition:border-color .18s ease,color .18s ease,transform .18s ease;
}
.chip:hover{border-color:var(--brand-500);color:var(--text-1);transform:translateY(-1px);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(13,20,40,.92);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(35,211,184,.22),rgba(217,138,78,.16));
  border:1px solid var(--line-strong);
}
.brand-mark svg{width:20px;height:20px;}
.brand-name{font-size:20px;font-weight:800;color:var(--text-1);letter-spacing:-.01em;}
.brand-name em{font-style:normal;color:var(--brand-500);}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;padding:8px 14px;font-size:15px;font-weight:500;color:var(--text-2);
  border-radius:var(--r-sm);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--text-1);}
.nav-cta{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);color:var(--text-1);font-size:17px;
}
.nav-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:rgba(8,13,26,.98);
  padding:18px 24px 26px;
}
.nav-drawer.is-open{display:block;}
.nav-drawer a{
  display:block;padding:13px 4px;font-size:16px;font-weight:500;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.nav-drawer a.active{color:var(--brand-500);}
.nav-drawer .drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:18px;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:64px 0 84px;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 -1px 0;height:1px;background:var(--line);
}
.hero-bg{
  position:absolute;inset:0;z-index:-1;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center 30%;
  opacity:.16;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 92%);
}
.hero-grid{display:flex;flex-wrap:wrap;gap:56px;align-items:center;}
.hero-copy{flex:1 1 500px;min-width:0;}
.hero-media{flex:1 1 420px;min-width:0;}
.hero h1{margin-bottom:20px;}
.hero h1 .hl{color:var(--brand-500);}
.hero-sub{font-size:17px;line-height:1.8;color:var(--text-2);max-width:560px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card),var(--inner-line);
  aspect-ratio:4/3;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(215deg,rgba(13,20,40,0) 42%,rgba(13,20,40,.92));
}
.hero-figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:20px 22px;
  font-size:13px;color:var(--text-2);
}
.hero-figure figcaption strong{display:block;color:var(--text-1);font-size:15px;margin-bottom:4px;}
.stat-bar{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  margin-bottom:26px;
}
.stat-item{background:rgba(21,29,56,.72);padding:18px 16px;}
.stat-value{font-family:var(--font-num);font-size:28px;font-weight:700;color:var(--lime-400);line-height:1.1;}
.stat-label{font-size:13px;color:var(--text-3);margin-top:6px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.hero-badges .badge{font-size:12px;padding:5px 12px;}

/* ---------- 价值条 ---------- */
.value-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;
}
.value-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px;border-radius:var(--r-md);
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inner-line);
  transition:transform .18s ease,border-color .18s ease;
}
.value-item:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4);}
.value-icon{
  flex:0 0 auto;width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;font-size:17px;color:var(--brand-500);
  background:rgba(35,211,184,.08);border:1px solid rgba(35,211,184,.22);
}
.value-item h3{font-size:17px;margin-bottom:6px;}
.value-item p{font-size:14px;line-height:1.7;color:var(--text-2);}

/* ---------- 截图轮播 ---------- */
.orbit{margin:0;}
.orbit-container{
  height:auto !important;background:transparent !important;
}
.orbit-container .orbit-slide{
  position:relative !important;top:auto !important;left:auto !important;width:100% !important;
}
.orbit-controls{position:absolute;right:0;top:-72px;display:flex;gap:10px;}
.orbit-previous,.orbit-next{
  position:static !important;
  width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;
  font-size:18px;color:var(--text-1);
  background:rgba(21,29,56,.55);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(8px);
  transition:border-color .18s ease,color .18s ease;
}
.orbit-previous:hover,.orbit-next:hover{border-color:var(--brand-500);color:var(--brand-500);}
.orbit-bullets{display:flex;justify-content:center;gap:10px;margin-top:26px;}
.orbit-bullets button{
  width:6px;height:6px;border-radius:1px;background:rgba(139,166,255,.35);
  padding:0;transition:background .18s ease,transform .18s ease;
}
.orbit-bullets button.is-active{background:var(--brand-500);transform:scale(1.4);}
.shot{display:flex;flex-wrap:wrap;gap:28px;align-items:center;}
.shot-frame{
  flex:1 1 420px;min-width:0;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line-strong);background:var(--ink-800);
  box-shadow:var(--shadow-card);
}
.shot-frame img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.shot figcaption{flex:1 1 300px;min-width:0;}
.shot figcaption h3{margin-bottom:10px;}
.shot figcaption p{font-size:15px;color:var(--text-2);}

/* ---------- 系统要求 ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.spec-card{
  position:relative;padding:26px 24px;border-radius:var(--r-md);
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inner-line);
}
.spec-card.recommended{
  border-color:rgba(35,211,184,.45);
  background:rgba(21,29,56,.62);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.spec-tag{
  position:absolute;top:-12px;left:24px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;
  background:var(--brand-500);color:#04231E;
}
.spec-card h3{font-size:19px;margin-bottom:4px;}
.spec-card .spec-note{font-size:13px;color:var(--text-3);margin-bottom:18px;}
.spec-row{
  display:flex;justify-content:space-between;gap:14px;
  padding:11px 0;font-size:14px;border-top:1px solid var(--line);
}
.spec-row:first-of-type{border-top:0;}
.spec-row dt{color:var(--text-3);flex:0 0 auto;}
.spec-row dd{margin:0;color:var(--text-1);text-align:right;}

/* ---------- 评价墙 ---------- */
.review-card{
  height:100%;
  padding:22px;border-radius:var(--r-md);
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inner-line);
  display:flex;flex-direction:column;gap:12px;
  transition:transform .18s ease,border-color .18s ease;
}
.review-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4);}
.review-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;
  display:grid;place-items:center;font-weight:700;font-size:14px;color:var(--brand-500);
  background:rgba(35,211,184,.1);border:1px solid rgba(35,211,184,.25);
}
.review-name{font-size:15px;font-weight:600;color:var(--text-1);line-height:1.3;}
.review-role{font-size:12px;color:var(--text-3);}
.stars{color:var(--lime-400);font-size:13px;letter-spacing:2px;}
.review-text{font-size:14px;line-height:1.75;color:var(--text-2);}
.review-from{font-size:12px;color:var(--text-3);margin-top:auto;}

/* ---------- 下载 ---------- */
.download-wrap{
  display:flex;flex-wrap:wrap;gap:36px;align-items:center;
}
.download-main{flex:1 1 560px;min-width:0;}
.download-btns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-bottom:20px;}
.dl-btn{
  display:flex;flex-direction:column;gap:4px;
  min-height:64px;padding:14px 20px;border-radius:var(--r-md);
  border:1px solid var(--line-strong);color:var(--text-1);
  background:rgba(21,29,56,.7);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease,color .18s ease;
}
.dl-btn .dl-name{font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px;}
.dl-btn .dl-meta{font-size:12px;color:var(--text-3);}
.dl-btn:hover{transform:translateY(-2px);border-color:var(--brand-500);color:var(--text-1);}
.dl-btn.primary{
  background:var(--brand-500);border-color:var(--brand-500);color:#04231E;
  box-shadow:0 0 0 rgba(35,211,184,0);
}
.dl-btn.primary .dl-meta{color:rgba(4,35,30,.72);}
.dl-btn.primary:hover{box-shadow:0 0 20px var(--brand-glow);}
.download-side{flex:0 1 260px;min-width:200px;display:flex;gap:18px;align-items:center;}
.qr-box{
  width:104px;height:104px;flex:0 0 auto;border-radius:var(--r-sm);
  border:1px dashed var(--line-strong);display:grid;place-items:center;
  color:var(--text-3);font-size:12px;text-align:center;padding:10px;
  background:rgba(21,29,56,.5);
}
.download-side .side-note{font-size:13px;color:var(--text-3);line-height:1.7;}
.download-side .side-note a{display:inline-block;margin-top:6px;font-size:13px;}

/* ---------- 最新动态 ---------- */
.news-card{
  height:100%;display:flex;flex-direction:column;
  border-radius:var(--r-md);overflow:hidden;
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--inner-line);
  transition:transform .18s ease,border-color .18s ease;
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4);}
.news-cover{display:block;overflow:hidden;background:rgba(35,211,184,.08);}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease;}
.news-card:hover .news-cover img{transform:scale(1.03);}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-title{font-size:18px;line-height:1.45;}
.news-title a{color:var(--text-1);}
.news-title a:hover{color:var(--brand-500);}
.news-summary{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;font-size:13px;color:var(--text-3);}
.arrow-link{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line-strong);color:var(--text-2);font-size:13px;}
.arrow-link:hover{border-color:var(--brand-500);color:var(--brand-500);}
.empty-state{
  padding:40px 24px;text-align:center;border-radius:var(--r-md);
  border:1px dashed var(--line-strong);background:rgba(21,29,56,.4);
}
.empty-state p{max-width:none;color:var(--text-2);margin-bottom:16px;}

/* ---------- FAQ ---------- */
.faq-group{margin-bottom:44px;}
.faq-group:last-child{margin-bottom:0;}
.faq-group-title{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.faq-group-title span{
  font-family:var(--font-num);font-size:15px;color:var(--amber-500);
  border:1px solid rgba(217,138,78,.35);border-radius:var(--r-sm);padding:2px 10px;
}
.faq-group-title h3{font-size:18px;}
.accordion{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--ink-800);}
.accordion-item + .accordion-item{border-top:1px solid var(--line);}
.accordion-title{
  position:relative;display:block;padding:18px 52px 18px 22px;
  font-size:17px;font-weight:600;color:var(--text-1);
  background:transparent;border:0;
}
.accordion-title::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--brand-500);transform:scaleY(0);transform-origin:center;
  transition:transform .2s ease;
}
.accordion-item.is-active .accordion-title::before{transform:scaleY(1);}
.accordion-title::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--text-3);transition:color .18s ease;
}
.accordion-item.is-active .accordion-title::after{content:"–";color:var(--brand-500);}
.accordion-title:hover{color:var(--brand-500);}
.accordion-content{display:none;padding:0 52px 22px 22px;background:transparent;border:0;}
.accordion-item.is-active > .accordion-content{display:block;}
.accordion-content p{font-size:15px;line-height:1.8;color:var(--text-2);}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(21,29,56,.95),rgba(8,13,26,.95));
  padding:56px 48px;
}
.cta-band::before{
  content:"";position:absolute;right:-12%;top:-60%;width:70%;aspect-ratio:1;
  border-radius:50%;border:1px solid rgba(35,211,184,.18);
  box-shadow:0 0 0 60px rgba(35,211,184,.04),0 0 0 130px rgba(217,138,78,.035);
  opacity:.8;pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;left:-10%;bottom:-70%;width:56%;aspect-ratio:1;
  border-radius:50%;border:1px solid rgba(139,166,255,.2);opacity:.6;pointer-events:none;
}
.cta-inner{position:relative;max-width:720px;}
.cta-inner h2{margin-bottom:14px;}
.cta-inner p{color:var(--text-2);margin-bottom:26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:var(--gap-section);
  background:var(--ink-950);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .brand-name{font-size:19px;}
.footer-brand p{font-size:14px;color:var(--text-3);line-height:1.8;margin-top:16px;max-width:26em;}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:var(--text-1);margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--text-1);}
.footer-col p{font-size:14px;color:var(--text-3);margin-bottom:8px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--text-1);}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s ease;}
.reveal.is-visible{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  :root{--gap-section:72px;}
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:grid;place-items:center;margin-left:auto;}
  .value-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .spec-grid{grid-template-columns:1fr;gap:24px;}
  .download-btns{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .hero-grid{gap:40px;}
  .orbit-controls{position:static;justify-content:flex-end;margin-bottom:16px;}
}
@media (max-width:767px){
  :root{--gap-section:56px;}
  body{font-size:15.5px;}
  .grid-container{padding-left:18px;padding-right:18px;}
  .nav-inner{height:60px;}
  .brand-name{font-size:18px;}
  h3{font-size:19px;}
  .stat-bar{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-value{font-size:24px;}
  .value-strip{grid-template-columns:1fr;}
  .hero{padding:40px 0 56px;}
  .hero-actions .btn{width:100%;}
  .section-head{margin-bottom:32px;}
  .shot{flex-direction:column;gap:18px;}
  .shot figcaption{flex:1 1 auto;}
  .orbit-container{display:flex !important;height:auto !important;overflow-x:auto;gap:16px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;padding-bottom:6px;}
  .orbit-slide{display:block !important;flex:0 0 86%;scroll-snap-align:center;}
  .orbit-controls{display:none;}
  .orbit-bullets{display:none;}
  .download-side{flex-direction:column;align-items:flex-start;}
  .cta-band{padding:40px 24px;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
  .review-card .review-text{font-size:14px;}
}
@media (max-width:520px){
  .hero-badges .badge{font-size:12px;}
  .download-btns{grid-template-columns:1fr;}
  .stat-bar{grid-template-columns:1fr 1fr;}
}

/* roulang page: article */
:root{
  --ink-950:#080D1A;
  --ink-900:#0D1428;
  --ink-800:#151D38;
  --ink-700:#1E2947;
  --line:rgba(139,166,255,.14);
  --line-strong:rgba(139,166,255,.28);
  --brand-500:#23D3B8;
  --brand-600:#12A693;
  --brand-glow:rgba(35,211,184,.45);
  --amber-500:#D98A4E;
  --amber-700:#8E5630;
  --lime-400:#D8F35A;
  --text-1:#EAEFF9;
  --text-2:#A6B2CB;
  --text-3:#6B7896;
  --success:#3ECF8E;
  --warn:#E9A03B;
  --danger:#E4574C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.9);
  --inset-hi:inset 0 1px 0 rgba(255,255,255,.06);
  --gap-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 10% -12%, rgba(35,211,184,.10), transparent 62%),
    radial-gradient(760px 420px at 102% -4%, rgba(217,138,78,.08), transparent 66%);
}
h1,h2,h3,h4,h5,h6{color:var(--text-1);margin:0;line-height:1.25;font-weight:700}
p{margin:0}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease}
a:hover{color:#63e6d1}
ul,ol{margin:0;padding:0}
li{list-style:none}
img{display:block;max-width:100%;height:auto;border:0}
button{font-family:inherit;font-size:inherit;border:0;background:none;color:inherit;cursor:pointer}
figure{margin:0}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
.grid-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.grid-container.full{padding:0}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1;font-weight:600;
  padding:7px 13px;border-radius:var(--r-pill);
  border:1px solid rgba(35,211,184,.30);
  background:rgba(35,211,184,.08);
  color:var(--brand-500);
}
.badge-amber{border-color:rgba(217,138,78,.32);background:rgba(217,138,78,.08);color:var(--amber-500)}
.badge-quiet{border-color:var(--line-strong);background:rgba(139,166,255,.05);color:var(--text-2)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease,filter .18s ease;
}
.btn-primary{background:linear-gradient(180deg,#2ee3c6,#12A693);color:#03231f;box-shadow:0 12px 28px -16px rgba(35,211,184,.85)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 18px var(--brand-glow);transform:translateY(-1px);color:#03231f}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-500);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-lg{height:56px;padding:0 30px;font-size:16px}
.btn-block{width:100%}

/* ============ Header / Nav ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:transparent;
  transition:background .25s ease,box-shadow .25s ease,border-color .25s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(13,20,40,.86);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:0 10px 30px -20px rgba(0,0,0,.9);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1)}
.brand:hover{color:var(--text-1)}
.brand-mark{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--line-strong);background:rgba(139,166,255,.06)}
.brand-mark svg{width:20px;height:20px}
.brand-name{font-size:20px;font-weight:800;letter-spacing:-.01em}
.brand-name em{font-style:normal;color:var(--brand-500)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:500;color:var(--text-2)}
.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,.nav-link.active{color:var(--text-1)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.header-cta{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-1);transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer-backdrop{
  position:fixed;inset:0;z-index:55;background:rgba(4,8,18,.66);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.drawer-backdrop.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:60;
  width:min(330px,86vw);
  background:var(--ink-950);
  border-left:1px solid var(--line);
  padding:96px 22px 28px;
  transform:translateX(102%);
  transition:transform .3s cubic-bezier(.3,.8,.4,1);
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:26px}
.drawer-nav a{display:block;padding:13px 12px;border-radius:var(--r-sm);font-size:16px;font-weight:500;color:var(--text-2);border:1px solid transparent}
.drawer-nav a:hover{color:var(--text-1);background:var(--ink-800);border-color:var(--line)}
.drawer-nav a.active{color:var(--brand-500);background:rgba(35,211,184,.07);border-color:rgba(35,211,184,.25)}
.drawer-cta{display:flex;flex-direction:column;gap:12px}
.drawer-close{position:absolute;top:22px;right:20px;width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;color:var(--text-2)}

/* ============ Article head ============ */
.article-head{padding:40px 0 0;position:relative;z-index:1}
.breadcrumb{margin-bottom:26px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px;color:var(--text-3)}
.breadcrumb li+li::before{content:"/";color:var(--text-3);opacity:.6}
.breadcrumb a{color:var(--brand-500);font-size:13px}
.breadcrumb a:hover{color:#63e6d1}
.breadcrumb .current{color:var(--text-3);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head-main{max-width:860px}
.article-title{
  font-size:clamp(28px,4.2vw,46px);
  font-weight:800;line-height:1.16;letter-spacing:-.02em;
  margin:18px 0 18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:13.5px;color:var(--text-3)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.6}
.article-cover{margin:34px 0 0;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);background:var(--ink-800)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* ============ Layout ============ */
main{position:relative;z-index:1}
.article-wrap{padding:56px 0 var(--gap-section)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
.article-flow{max-width:760px;min-width:0}

/* ============ Content typography ============ */
.article-content{font-size:17.5px;line-height:1.85;color:var(--text-2)}
.article-content>*:first-child{margin-top:0}
.article-content p{margin:0 0 20px}
.article-content h2{
  position:relative;
  font-size:clamp(22px,2.4vw,28px);
  font-weight:700;color:var(--text-1);
  margin:46px 0 16px;padding-left:16px;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:4px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand-500),var(--amber-500));
}
.article-content h3{font-size:20px;font-weight:600;color:var(--text-1);margin:34px 0 12px}
.article-content h4{font-size:17px;font-weight:600;color:var(--text-1);margin:26px 0 10px}
.article-content ul,.article-content ol{margin:0 0 20px;padding-left:22px}
.article-content ul li{list-style:disc}
.article-content ol li{list-style:decimal}
.article-content li{margin-bottom:8px;padding-left:2px}
.article-content li::marker{color:var(--brand-500)}
.article-content blockquote{
  margin:26px 0;padding:18px 22px;
  border-left:3px solid var(--amber-500);
  background:rgba(255,255,255,.055);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  color:var(--text-2);
}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:var(--r-md);margin:26px 0 10px;border:1px solid var(--line)}
.article-content figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-bottom:24px}
.article-content a{color:var(--brand-500);text-decoration:underline;text-underline-offset:3px}
.article-content strong{color:var(--text-1);font-weight:600}
.article-content hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-content table{
  width:100%;border-collapse:separate;border-spacing:0;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  font-size:15px;margin:26px 0;
}
.article-content th{background:var(--ink-800);color:var(--text-1);font-weight:600;text-align:left;padding:13px 16px;font-size:14.5px}
.article-content td{padding:13px 16px;border-top:1px solid var(--line);color:var(--text-2)}
.article-content tbody tr:nth-child(even){background:rgba(139,166,255,.04)}
.article-content code{background:var(--ink-800);border:1px solid var(--line);border-radius:6px;padding:2px 6px;font-size:14.5px;color:var(--lime-400)}

/* ============ Empty state ============ */
.article-empty{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--ink-800);padding:44px 32px;text-align:center;
  box-shadow:var(--shadow-card),var(--inset-hi);
}
.article-empty h2{font-size:24px;margin-bottom:12px}
.article-empty p{max-width:460px;margin:0 auto 22px;font-size:15.5px;color:var(--text-2)}

/* ============ Tags + share ============ */
.article-foot{margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:22px}
.tag-row .tag-label{font-size:13px;color:var(--text-3);margin-right:2px}
.tag{display:inline-flex;align-items:center;font-size:13px;padding:6px 14px;border-radius:var(--r-pill);border:1px solid var(--line-strong);color:var(--text-2);background:rgba(139,166,255,.05)}
.tag:hover{border-color:rgba(35,211,184,.4);color:var(--brand-500)}
.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.share-row .share-label{font-size:13px;color:var(--text-3);margin-right:2px}
.share-btn{
  display:inline-flex;align-items:center;gap:8px;
  height:38px;padding:0 16px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);color:var(--text-2);font-size:13.5px;font-weight:500;
  transition:border-color .18s ease,color .18s ease,transform .18s ease;
}
.share-btn svg{width:15px;height:15px}
.share-btn:hover{border-color:var(--brand-500);color:var(--brand-500);transform:translateY(-1px)}

/* ============ Pager ============ */
.article-pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:34px}
.pager-item{
  display:flex;flex-direction:column;gap:6px;
  padding:18px 20px;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--ink-800);
  transition:transform .18s ease,border-color .18s ease;
}
.pager-item:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4)}
.pager-label{font-size:12.5px;color:var(--text-3)}
.pager-title{font-size:16px;font-weight:600;color:var(--text-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pager-item:hover .pager-title{color:var(--brand-500)}
.pager-item.next{text-align:right;align-items:flex-end}

/* ============ Sidebar ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:22px}
.side-card{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--ink-800);padding:22px;
  box-shadow:var(--shadow-card),var(--inset-hi);
}
.side-card h3{font-size:15px;font-weight:600;letter-spacing:.02em;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:10px;height:10px;border-radius:3px;background:var(--brand-500);opacity:.85}
.toc-list{display:flex;flex-direction:column;gap:2px;counter-reset:toc}
.toc-list a{
  display:block;padding:8px 10px;border-radius:var(--r-sm);
  font-size:14px;color:var(--text-2);border-left:2px solid transparent;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.toc-list a:hover{color:var(--brand-500);background:rgba(35,211,184,.06);border-left-color:var(--brand-500)}
.side-links{display:flex;flex-direction:column;gap:8px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:var(--r-sm);font-size:14px;color:var(--text-2);
  border:1px solid transparent;background:rgba(139,166,255,.04);
}
.side-links a:hover{color:var(--text-1);border-color:var(--line-strong);background:var(--ink-700)}
.side-links a span:last-child{color:var(--text-3);font-size:12px}
.dl-card{border:1px solid rgba(35,211,184,.28);border-radius:var(--r-md);background:linear-gradient(180deg,rgba(35,211,184,.07),rgba(21,29,56,.9));padding:22px;box-shadow:var(--shadow-card),var(--inset-hi)}
.dl-card h3{font-size:16px;margin-bottom:8px}
.dl-card p{font-size:13.5px;color:var(--text-2);margin-bottom:16px;line-height:1.7}
.qr-box{
  width:96px;height:96px;border-radius:var(--r-sm);border:1px solid var(--line-strong);
  background:var(--ink-900);display:flex;align-items:center;justify-content:center;
  margin:0 auto 16px;position:relative;
}
.qr-box::before{content:"";width:44px;height:44px;border-radius:6px;border:2px dashed rgba(35,211,184,.5)}
.qr-box::after{content:"";position:absolute;inset:12px;border-radius:4px;border:1px solid var(--line)}

/* ============ Related ============ */
.related-section{padding:0 0 var(--gap-section);position:relative;z-index:1}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:30px}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:700}
.section-head .link-all{font-size:14px;font-weight:600;color:var(--brand-500);display:inline-flex;align-items:center;gap:6px}
.section-head .link-all:hover{color:#63e6d1}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;height:100%;
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--ink-800);overflow:hidden;
  box-shadow:var(--shadow-card),var(--inset-hi);
  transition:transform .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4)}
.post-card .thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--ink-700)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.post-card:hover .thumb img{transform:scale(1.03)}
.post-card .card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-card .card-body h3{font-size:17px;font-weight:600;line-height:1.45}
.post-card .card-body h3 a{color:var(--text-1)}
.post-card .card-body h3 a:hover{color:var(--brand-500)}
.post-card .card-desc{font-size:14px;color:var(--text-2);line-height:1.7;margin:0}
.post-card .card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3);padding-top:6px}
.post-card .card-foot .arrow{color:var(--brand-500);font-size:15px}

/* ============ CTA band ============ */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(135deg,#0B1226,#151D38 58%,#0F1A31);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band::before{
  content:"";position:absolute;inset:-50% -14%;
  background:
    repeating-radial-gradient(circle at 80% 118%, rgba(139,166,255,.07) 0 1px, transparent 1px 46px),
    radial-gradient(600px 300px at 14% 0%, rgba(35,211,184,.08), transparent 70%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:1;padding:88px 0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px}
.cta-copy{max-width:640px}
.cta-copy h2{font-size:clamp(24px,3.2vw,36px);margin-bottom:14px}
.cta-copy p{font-size:16px;color:var(--text-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ Footer ============ */
.site-footer{background:var(--ink-950);border-top:1px solid var(--line);padding:70px 0 26px;position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.15fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-3);max-width:330px;line-height:1.75}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:9px}
.footer-col li a{font-size:14px;color:var(--text-2)}
.footer-col li a:hover{color:var(--text-1)}
.footer-col p{font-size:14px;color:var(--text-2);margin-bottom:10px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ============ Responsive ============ */
@media (max-width:1023px){
  :root{--gap-section:72px}
  .nav-links,.header-cta{display:none}
  .nav-toggle{display:flex}
  .article-layout{grid-template-columns:1fr;gap:40px}
  .article-side{position:static;top:auto}
  .article-flow{max-width:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:767px){
  :root{--gap-section:56px}
  .header-inner{height:60px}
  .brand-name{font-size:18px}
  .article-head{padding:26px 0 0}
  .article-title{margin:14px 0 14px}
  .article-cover{margin-top:26px}
  .article-content{font-size:16.5px;line-height:1.8}
  .article-wrap{padding:40px 0 var(--gap-section)}
  .article-pager{grid-template-columns:1fr}
  .pager-item.next{text-align:left;align-items:flex-start}
  .cta-inner{padding:60px 0;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .grid-container{padding:0 18px}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .article-empty{padding:32px 20px}
  .breadcrumb .current{max-width:180px}
}

/* roulang page: category1 */
:root{
  --ink-950:#080D1A;
  --ink-900:#0D1428;
  --ink-800:#151D38;
  --ink-700:#1E2947;
  --line:rgba(139,166,255,.14);
  --line-strong:rgba(139,166,255,.28);
  --brand-500:#23D3B8;
  --brand-600:#12A693;
  --brand-glow:rgba(35,211,184,.45);
  --amber-500:#D98A4E;
  --amber-700:#8E5630;
  --lime-400:#D8F35A;
  --text-1:#EAEFF9;
  --text-2:#A6B2CB;
  --text-3:#6B7896;
  --ok:#3ECF8E;
  --warn:#E9A03B;
  --err:#E4574C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.06);
  --sec-pad:96px;
  --font-cn:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Condensed","HarmonyOS Sans","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease}
a:hover{color:#5ae8d2}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.25}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px}
::selection{background:rgba(35,211,184,.3);color:#fff}

/* ---------- 布局容器 ---------- */
.grid-container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.grid-x{display:flex;flex-wrap:wrap;margin-left:-12px;margin-right:-12px}
.grid-x>.cell{padding-left:12px;padding-right:12px;width:100%}
@media (min-width:640px){
  .grid-x>.medium-6{width:50%}
  .grid-x>.medium-4{width:33.3333%}
}
@media (min-width:1024px){
  .grid-x>.large-3{width:25%}
  .grid-x>.large-4{width:33.3333%}
  .grid-x>.large-5{width:41.6667%}
  .grid-x>.large-7{width:58.3333%}
  .grid-x>.large-8{width:66.6667%}
}

/* ---------- 顶部导航 ---------- */
.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(13,20,40,.84);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line-strong);
}
.header-inner{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);flex:0 0 auto}
.brand:hover{color:var(--text-1)}
.brand-mark{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;background:linear-gradient(140deg,rgba(35,211,184,.18),rgba(217,138,78,.12));
  border:1px solid var(--line-strong);
}
.brand-mark svg{width:22px;height:22px}
.brand-name{font-size:20px;font-weight:800;letter-spacing:-.01em;color:var(--text-1)}
.brand-name em{font-style:normal;color:var(--brand-500)}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:12px;flex:1 1 auto}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;font-size:15px;font-weight:500;
  color:var(--text-2);border-radius:var(--r-sm);transition:color .18s ease,background .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand-500);transform:scaleX(0);transform-origin:left;transition:transform .18s ease;
}
.nav-link:hover{color:var(--text-1);background:rgba(139,166,255,.06)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{transform:scaleX(1)}
.nav-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);
  background:rgba(139,166,255,.08);border:1px solid var(--line-strong);color:var(--text-1);
  cursor:pointer;align-items:center;justify-content:center;
}
.nav-drawer{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;border:1px solid transparent;
  cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:var(--brand-500);color:#04211c;border-color:var(--brand-500)}
.btn-primary:hover{background:#41e2ca;color:#04211c;transform:translateY(-1px);box-shadow:0 0 18px var(--brand-glow)}
.btn-primary:active{transform:translateY(0);background:var(--brand-600)}
.btn-outline{background:transparent;color:var(--text-1);border-color:var(--line-strong)}
.btn-outline:hover{color:var(--text-1);border-color:rgba(35,211,184,.6);transform:translateY(-1px)}
.btn-outline:active{transform:translateY(0)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--brand-500)}
.link-more i{transition:transform .18s ease;font-size:12px}
.link-more:hover i{transform:translateX(4px)}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:22px 0 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px}
.breadcrumb li{display:flex;align-items:center;gap:8px;color:var(--text-3)}
.breadcrumb a{color:var(--brand-500);font-size:13px}
.breadcrumb a:hover{color:#5ae8d2}
.breadcrumb li+li::before{content:"/";color:var(--text-3)}

/* ---------- Hero ---------- */
.page-hero{position:relative;padding:44px 0 8px;overflow:hidden}
.page-hero .hero-bg{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(680px 340px at 88% 8%,rgba(35,211,184,.13),transparent 70%),
    radial-gradient(520px 300px at 8% 92%,rgba(217,138,78,.10),transparent 72%),
    linear-gradient(180deg,rgba(8,13,26,.6),rgba(13,20,40,0));
}
.page-hero .hero-arc{
  position:absolute;width:560px;height:560px;right:-180px;top:-200px;border-radius:50%;
  border:1px solid rgba(139,166,255,.16);opacity:.5;pointer-events:none;
}
.page-hero .hero-arc::before,
.page-hero .hero-arc::after{
  content:"";position:absolute;inset:56px;border-radius:50%;border:1px solid rgba(139,166,255,.12);
}
.page-hero .hero-arc::after{inset:112px;border-color:rgba(217,138,78,.16)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;padding-top:26px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:var(--brand-500);
  background:rgba(35,211,184,.08);border:1px solid rgba(35,211,184,.3);
}
.eyebrow i{font-size:11px}
.hero-title{
  font-size:clamp(32px,4.4vw,52px);font-weight:800;line-height:1.12;letter-spacing:-.02em;
  margin:20px 0 16px;max-width:640px;
}
.hero-title .accent{color:var(--brand-500)}
.hero-sub{font-size:17px;line-height:1.8;color:var(--text-2);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-note{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.pill-note{
  display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-3);background:rgba(139,166,255,.05);border:1px solid var(--line);
}
.pill-note i{color:var(--brand-500);font-size:11px}

/* 指标卡：玻璃 */
.metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.metric-card{
  padding:22px 20px;border-radius:var(--r-lg);
  background:linear-gradient(150deg,rgba(21,29,56,.78),rgba(21,29,56,.46));
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease;
}
.metric-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.5)}
.metric-value{
  display:block;font-family:var(--font-num);font-size:30px;font-weight:700;
  color:var(--lime-400);line-height:1.1;letter-spacing:.01em;font-variant-numeric:tabular-nums;
}
.metric-label{display:block;margin-top:6px;font-size:14px;font-weight:600;color:var(--text-1)}
.metric-note{display:block;margin-top:2px;font-size:12.5px;color:var(--text-3)}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sec-pad) 0}
.section.tight{padding-top:64px}
.section-head{max-width:720px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-tag{
  display:inline-block;font-size:13px;font-weight:600;color:var(--amber-500);
  letter-spacing:.06em;margin-bottom:12px;
}
.section-title{font-size:clamp(24px,3vw,36px);font-weight:700;letter-spacing:-.01em}
.section-sub{margin-top:14px;font-size:16px;line-height:1.8;color:var(--text-2)}

/* ---------- 宽卡列表 ---------- */
.feature-list{display:flex;flex-direction:column;gap:24px}
.feature-row{
  display:grid;grid-template-columns:minmax(0,400px) minmax(0,1fr);gap:32px;align-items:center;
  padding:24px;border-radius:var(--r-md);
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease,border-color .22s ease;
}
.feature-row:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4)}
.feature-media{position:relative;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9}
.feature-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.feature-row:hover .feature-media img{transform:scale(1.03)}
.feature-body h3{font-size:21px;font-weight:600;margin:12px 0 10px}
.feature-body p{font-size:15.5px;line-height:1.8;color:var(--text-2);max-width:640px}
.feature-points{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 18px}
.point-chip{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);
  padding:5px 12px;border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(139,166,255,.05);
}
.point-chip i{color:var(--brand-500);font-size:11px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:var(--brand-500);
  background:rgba(35,211,184,.08);border:1px solid rgba(35,211,184,.3);
}
.badge-amber{color:var(--amber-500);background:rgba(217,138,78,.08);border-color:rgba(217,138,78,.32)}

/* ---------- 说明区 ---------- */
.explain-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:start}
.explain-copy h2{font-size:clamp(24px,3vw,34px);font-weight:700;margin-bottom:18px}
.explain-copy p+p{margin-top:16px}
.explain-copy p{font-size:16.5px;line-height:1.85;color:var(--text-2)}
.dim-panel{
  border-radius:var(--r-md);border:1px solid var(--line);background:var(--ink-800);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.dim-panel-head{
  padding:18px 24px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.dim-panel-head h3{font-size:16px;font-weight:600}
.dim-panel-head span{font-size:12.5px;color:var(--text-3)}
.dim-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 24px;border-bottom:1px solid var(--line);font-size:14.5px;
}
.dim-row:last-child{border-bottom:0}
.dim-row .k{color:var(--text-3)}
.dim-row .v{color:var(--text-1);font-weight:600;font-variant-numeric:tabular-nums}
.dim-row .v.lime{color:var(--lime-400)}
.dim-row .v.amber{color:var(--amber-500)}

/* ---------- 流程步骤 ---------- */
.step-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step-card{
  padding:24px 20px;border-radius:var(--r-md);background:var(--ink-800);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease;
}
.step-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4)}
.step-no{
  font-family:var(--font-num);font-size:30px;font-weight:700;color:var(--amber-500);
  line-height:1;letter-spacing:.02em;font-variant-numeric:tabular-nums;
}
.step-card h3{font-size:17px;font-weight:600;margin:14px 0 8px}
.step-card p{font-size:14px;line-height:1.75;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px}
.faq-wrap .accordion{border:0;background:transparent;margin:0}
.faq-wrap .accordion-item{
  border:1px solid var(--line);background:var(--ink-800);border-radius:var(--r-md);
  margin-bottom:14px;overflow:hidden;transition:border-color .2s ease;
}
.faq-wrap .accordion-item:hover{border-color:var(--line-strong)}
.faq-wrap .accordion-item.is-active{border-color:rgba(35,211,184,.42)}
.faq-wrap .accordion-title{
  position:relative;background:transparent;border:0;color:var(--text-1);
  font-size:17px;font-weight:600;line-height:1.5;padding:20px 56px 20px 24px;
}
.faq-wrap .accordion-title:hover{background:var(--ink-700);color:var(--text-1)}
.faq-wrap .accordion-title::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:12px;
  position:absolute;right:24px;top:50%;transform:translateY(-50%);color:var(--text-3);
  transition:color .2s ease,transform .2s ease;
}
.faq-wrap .accordion-item.is-active .accordion-title::after{color:var(--brand-500);transform:translateY(-50%) rotate(180deg)}
.faq-wrap .accordion-item.is-active .accordion-title::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--brand-500);border-radius:0 3px 3px 0;
}
.faq-wrap .accordion-content{
  background:transparent;border:0;border-top:1px solid var(--line);
  color:var(--text-2);font-size:15px;line-height:1.85;padding:18px 24px 22px;
}

/* ---------- CTA 带 ---------- */
.cta-section{padding:0 0 var(--sec-pad)}
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:
    linear-gradient(120deg,rgba(8,13,26,.92),rgba(13,20,40,.86)),
    url(/assets/images/backpic/back-3.png) center/cover no-repeat;
  padding:64px 56px;
}
.cta-band::before{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  right:-160px;top:-180px;
  background:radial-gradient(circle,rgba(35,211,184,.16),transparent 66%);
  opacity:.55;pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;left:-80px;bottom:-220px;width:460px;height:460px;border-radius:50%;
  border:1px solid rgba(217,138,78,.22);opacity:.5;pointer-events:none;
}
.cta-inner{position:relative;max-width:720px}
.cta-inner h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3}
.cta-inner p{margin-top:14px;font-size:16px;line-height:1.8;color:var(--text-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-950);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:var(--text-3);max-width:320px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px}
.footer-col ul li+li{margin-top:10px}
.footer-col p{font-size:14px;color:var(--text-3);line-height:1.8}
.footer-col p+p{margin-top:6px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--text-1)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--sec-pad:72px}
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-drawer{
    display:block;max-height:0;overflow:hidden;
    background:rgba(8,13,26,.97);
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
    border-bottom:1px solid transparent;
    transition:max-height .28s ease,border-color .28s ease;
  }
  .nav-drawer.is-open{max-height:480px;border-bottom-color:var(--line-strong)}
  .nav-drawer-inner{padding:12px 24px 24px;display:flex;flex-direction:column;gap:4px}
  .nav-drawer .nav-link{padding:12px 4px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-drawer .nav-link::after{display:none}
  .nav-drawer .nav-link.active{color:var(--brand-500)}
  .drawer-cta{display:flex;flex-direction:column;gap:10px;margin-top:16px}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .explain-grid{grid-template-columns:1fr;gap:36px}
  .step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  :root{--sec-pad:56px}
  .grid-container{padding:0 20px}
  .header-inner{height:60px;gap:14px}
  .brand-name{font-size:18px}
  .brand-mark{width:30px;height:30px}
  .brand-mark svg{width:19px;height:19px}
  .hero-title{font-size:clamp(28px,7vw,38px)}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{flex:1 1 100%}
  .metric-card{padding:18px 16px}
  .metric-value{font-size:25px}
  .feature-row{grid-template-columns:1fr;gap:20px;padding:20px}
  .feature-body h3{font-size:19px}
  .section-head{margin-bottom:32px}
  .step-grid{grid-template-columns:1fr}
  .cta-band{padding:40px 24px}
  .cta-actions .btn{flex:1 1 100%}
  .faq-wrap .accordion-title{font-size:16px;padding:16px 48px 16px 18px}
  .faq-wrap .accordion-content{padding:16px 18px 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .metric-grid{grid-template-columns:1fr}
  .dim-row{flex-direction:column;align-items:flex-start;gap:4px}
  .dim-panel-head{flex-direction:column;align-items:flex-start;gap:4px}
}

/* roulang page: category2 */
:root{
  --ink-950:#080D1A;
  --ink-900:#0D1428;
  --ink-800:#151D38;
  --ink-700:#1E2947;
  --line:rgba(139,166,255,.14);
  --line-strong:rgba(139,166,255,.28);
  --brand-500:#23D3B8;
  --brand-600:#12A693;
  --brand-glow:rgba(35,211,184,.45);
  --amber-500:#D98A4E;
  --amber-700:#8E5630;
  --lime-400:#D8F35A;
  --text-1:#EAEFF9;
  --text-2:#A6B2CB;
  --text-3:#6B7896;
  --ok:#3ECF8E;
  --warn:#E9A03B;
  --err:#E4574C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.9);
  --inset-line:inset 0 1px 0 rgba(255,255,255,.06);
  --sec-pad:96px;
  --font-num:"Barlow Condensed","HarmonyOS Sans","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--text-1)}
h1,h2,h3,h4{color:var(--text-1);margin:0 0 12px;line-height:1.25;font-weight:700}
h1{font-size:clamp(30px,4.6vw,52px);font-weight:800;line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(23px,3vw,36px);font-weight:700}
h3{font-size:21px;font-weight:600}
h4{font-size:17px;font-weight:600}
p{margin:0 0 14px;max-width:42em}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,dt{margin:0}
button{font:inherit}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px}
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.01em}

/* ===== 顶栏 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(13,20,40,.58);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(8,13,26,.9);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
  box-shadow:0 12px 30px -22px rgba(0,0,0,.95);
}
.header-inner{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1)}
.brand:hover{color:var(--text-1)}
.brand-mark{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);border-radius:10px;background:var(--ink-800)}
.brand-mark svg{width:20px;height:20px}
.brand-name{font-size:20px;font-weight:800;letter-spacing:-.01em}
.brand-name em{font-style:normal;color:var(--brand-500)}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:12px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:6px 0}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--brand-500);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav-link:hover{color:var(--text-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 22px;height:44px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn:active{transform:translateY(1px);filter:brightness(.94)}
.btn-primary{background:linear-gradient(180deg,var(--brand-500),var(--brand-600));color:#04231F;box-shadow:0 0 0 rgba(35,211,184,0)}
.btn-primary:hover{color:#04231F;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 18px var(--brand-glow)}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line-strong)}
.btn-ghost:hover{color:var(--text-1);border-color:var(--brand-500);transform:translateY(-1px)}
.btn-lg{height:58px;padding:0 30px;font-size:16px}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);background:var(--ink-800);color:var(--text-1);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;margin:3px auto;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle.is-active span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle.is-active span:nth-child(2){opacity:0}
.nav-toggle.is-active span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-drawer{
  display:none;flex-direction:column;gap:6px;
  padding:14px 24px 22px;background:var(--ink-950);border-bottom:1px solid var(--line);
}
.nav-drawer.is-open{display:flex}
.nav-drawer a{color:var(--text-2);font-size:16px;padding:12px 2px;border-bottom:1px solid var(--line)}
.nav-drawer a.active{color:var(--brand-500)}
.nav-drawer .btn{width:100%;margin-top:12px;border-bottom:0;color:#04231F}
.nav-drawer .btn-ghost{color:var(--text-1)}

/* ===== 面包屑 ===== */
.crumb-bar{border-bottom:1px solid var(--line);background:rgba(8,13,26,.6)}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:16px 0;font-size:13px;color:var(--text-3)}
.crumb a{color:var(--brand-500);font-size:13px}
.crumb a:hover{color:var(--text-1)}
.crumb .sep{color:var(--text-3);opacity:.7}

/* ===== Hero ===== */
.hero-cat{
  position:relative;padding:80px 0 72px;
  background-image:linear-gradient(180deg,rgba(8,13,26,.74),rgba(13,20,40,.97)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.hero-cat::after{
  content:"";position:absolute;inset:auto 0 0 0;height:180px;pointer-events:none;
  background:radial-gradient(120% 100% at 78% 100%,rgba(35,211,184,.10),transparent 62%);
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:46px;align-items:center;position:relative;z-index:1}
.eyebrow{font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--amber-500);font-weight:600;margin-bottom:14px}
.hero-cat h1 .hl{color:var(--brand-500)}
.hero-sub{font-size:17px;color:var(--text-2);max-width:560px;margin:16px 0 10px}
.hero-desc{font-size:15px;color:var(--text-3);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-stats{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;
  background:rgba(139,166,255,.12);
  border:1px solid var(--line-strong);border-radius:var(--r-lg);overflow:hidden;
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  box-shadow:var(--shadow-card),var(--inset-line);
}
.hero-stats .cell-in{padding:22px 20px;background:rgba(21,29,56,.62)}
.hero-stats .val{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:32px;font-weight:700;color:var(--lime-400);line-height:1.1}
.hero-stats .lab{font-size:13px;color:var(--text-3);margin-top:6px}

/* ===== 通用板块 ===== */
.section{padding:var(--sec-pad) 0}
.section-alt{background:var(--ink-950);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{margin-bottom:12px}
.section-head .desc{font-size:16px;color:var(--text-2)}
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.in-view{opacity:1;transform:none}

/* ===== 筛选标签栏 ===== */
.filter-bar{
  display:flex;flex-wrap:wrap;gap:10px;padding:14px;
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--ink-800);
  margin-bottom:32px;
}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-2);border:1px solid var(--line-strong);background:transparent;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.chip.is-active{color:var(--brand-500);border-color:rgba(35,211,184,.5);background:rgba(35,211,184,.08)}

/* ===== 瀑布卡 ===== */
.gear-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.g-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-card),var(--inset-line);
  transition:transform .2s ease,border-color .2s ease;
}
.g-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4)}
.g-thumb{overflow:hidden;border-bottom:1px solid var(--line);position:relative}
.g-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.g-card:hover .g-thumb img{transform:scale(1.03)}
.g-thumb--a{height:300px}
.g-thumb--b{height:200px}
.g-thumb--c{height:250px}
.g-thumb--d{height:190px}
.g-thumb--e{height:276px}
.g-thumb--f{height:214px}
.g-thumb::after{content:"";position:absolute;inset:auto 0 0 0;height:60px;background:linear-gradient(180deg,transparent,rgba(21,29,56,.85))}
.g-body{padding:24px;display:flex;flex-direction:column;flex:1}
.g-body h3{font-size:18px;margin:12px 0 10px}
.g-body .g-text{font-size:14px;color:var(--text-2);margin-bottom:4px}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;
  height:28px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;letter-spacing:.02em;
}
.badge-brand{color:var(--brand-500);border:1px solid rgba(35,211,184,.3);background:rgba(35,211,184,.06)}
.badge-amber{color:var(--amber-500);border:1px solid rgba(217,138,78,.32);background:rgba(217,138,78,.07)}
.spec-list{margin:16px 0 18px;border-top:1px solid var(--line)}
.spec-list>div{display:flex;justify-content:space-between;gap:14px;padding:9px 0;border-bottom:1px solid var(--line)}
.spec-list dt{font-size:13px;color:var(--text-3)}
.spec-list dd{font-size:13px;color:var(--text-1);font-family:var(--font-num);font-variant-numeric:tabular-nums}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--brand-500);
}
.card-link::after{content:"→";transition:transform .2s ease}
.card-link:hover{color:var(--text-1)}
.card-link:hover::after{transform:translateX(3px)}

/* ===== 价值条 ===== */
.value-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.v-item{
  padding:26px 24px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--ink-800);box-shadow:var(--shadow-card),var(--inset-line);
  transition:transform .2s ease,border-color .2s ease;
}
.v-item:hover{transform:translateY(-2px);border-color:var(--line-strong)}
.v-icon{
  width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);background:rgba(217,138,78,.08);color:var(--amber-500);margin-bottom:16px;
}
.v-item h3{font-size:18px;margin-bottom:8px}
.v-item p{font-size:14px;color:var(--text-2);margin:0}

/* ===== 图文参数板块 ===== */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
.split-media{position:relative;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card)}
.split-media img{width:100%;height:380px;object-fit:cover}
.split-media .media-tag{
  position:absolute;left:18px;bottom:18px;padding:8px 14px;border-radius:var(--r-pill);
  background:rgba(8,13,26,.78);border:1px solid var(--line-strong);font-size:13px;color:var(--text-1);
}
.metric-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:26px}
.metric{padding:16px 0;border-top:1px solid var(--line)}
.metric .m-val{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:26px;font-weight:700;color:var(--brand-500)}
.metric .m-lab{font-size:13px;color:var(--text-3)}

/* ===== 流程 ===== */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.step{padding:24px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--ink-800);position:relative;box-shadow:var(--shadow-card)}
.step .s-no{font-family:var(--font-num);font-size:34px;font-weight:700;color:var(--amber-500);line-height:1}
.step h3{font-size:17px;margin:14px 0 8px}
.step p{font-size:14px;color:var(--text-2);margin:0}

/* ===== FAQ ===== */
.faq-group{margin-bottom:36px}
.faq-group > h3{font-size:18px;color:var(--text-1);margin-bottom:16px;display:flex;align-items:center;gap:10px}
.faq-group > h3::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--brand-500)}
.faq-acc{background:transparent;border:0;margin:0}
.faq-acc .accordion-item{
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--ink-800);
  margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow-card);
}
.faq-acc .accordion-title{
  position:relative;display:block;padding:18px 60px 18px 24px;
  font-size:17px;font-weight:600;color:var(--text-1);background:transparent;border:0;
}
.faq-acc .accordion-title:hover{color:var(--brand-500)}
.faq-acc .accordion-title::before{
  content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);
  color:var(--brand-500);font-size:20px;font-weight:600;float:none;line-height:1;
}
.faq-acc .accordion-item.is-active .accordion-title::before{content:"−"}
.faq-acc .accordion-item.is-active{border-color:rgba(35,211,184,.35)}
.faq-acc .accordion-content{
  background:transparent;border:0;border-top:1px solid var(--line);
  padding:18px 24px 20px 27px;color:var(--text-2);font-size:15px;line-height:1.8;
  border-left:3px solid var(--brand-500);
}
.faq-acc .accordion-content p{margin:0;max-width:60em;font-size:15px}

/* ===== CTA 带 ===== */
.cta-band{
  position:relative;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(90% 120% at 12% 0%,rgba(35,211,184,.08),transparent 58%),
    radial-gradient(70% 130% at 92% 110%,rgba(217,138,78,.07),transparent 60%);
}
.cta-band .inner{max-width:720px;padding:88px 0}
.cta-band h2{margin-bottom:14px}
.cta-band p{color:var(--text-2);font-size:16px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.ring-deco{position:absolute;right:-120px;top:-120px;width:460px;height:460px;border-radius:50%;border:1px solid rgba(139,166,255,.07);pointer-events:none}
.ring-deco::after{content:"";position:absolute;inset:70px;border-radius:50%;border:1px solid rgba(139,166,255,.06)}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink-950);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
.footer-brand p{font-size:14px;color:var(--text-3);margin-top:16px;max-width:32em}
.footer-col h4{font-size:15px;color:var(--text-1);margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--text-1)}
.footer-col p{font-size:14px;color:var(--text-2);margin:0 0 10px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}

/* ===== 响应式 ===== */
@media (max-width:1100px){
  .hero-grid{gap:34px}
  .value-strip{gap:20px}
}
@media (max-width:1023px){
  :root{--sec-pad:72px}
  .nav-links,.header-actions{display:none}
  .nav-toggle{display:flex}
  .hero-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:30px}
  .split-media img{height:320px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .value-strip{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  :root{--sec-pad:56px}
  .header-inner{height:60px;gap:14px}
  .brand-name{font-size:18px}
  .gear-grid{grid-template-columns:1fr;gap:20px}
  .g-thumb--a,.g-thumb--b,.g-thumb--c,.g-thumb--d,.g-thumb--e,.g-thumb--f{height:220px}
  .steps{grid-template-columns:1fr}
  .metric-row{grid-template-columns:1fr;gap:12px}
  .hero-stats .val{font-size:26px}
  .cta-band .inner{padding:64px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .g-body{padding:20px}
  .section-head{margin-bottom:28px}
}
@media (max-width:520px){
  .grid-container{padding-left:18px;padding-right:18px}
  .crumb{font-size:12px}
  .hero-cat{padding:56px 0 52px}
  .btn{height:42px;padding:0 18px;font-size:14px}
  .btn-lg{height:52px;font-size:15px}
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .filter-bar{padding:12px}
}

/* roulang page: category4 */
:root{
  --ink-950:#080D1A;
  --ink-900:#0D1428;
  --ink-800:#151D38;
  --ink-700:#1E2947;
  --line:rgba(139,166,255,.14);
  --line-strong:rgba(139,166,255,.28);
  --brand-500:#23D3B8;
  --brand-600:#12A693;
  --brand-glow:rgba(35,211,184,.45);
  --amber-500:#D98A4E;
  --amber-700:#8E5630;
  --lime-400:#D8F35A;
  --text-1:#EAEFF9;
  --text-2:#A6B2CB;
  --text-3:#6B7896;
  --ok:#3ECF8E;
  --warn:#E9A03B;
  --err:#E4574C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.9);
  --inset:inset 0 1px 0 rgba(255,255,255,.06);
  --gap:24px;
  --sec-y:96px;
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --font-num:"Barlow Condensed","HarmonyOS Sans SC","PingFang SC",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;border:0;}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease;}
a:hover,a:focus{color:#5BE7D2;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;color:var(--text-1);line-height:1.2;font-weight:700;}
p{margin:0;}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(35,211,184,.3);color:#fff;}
.grid-container{max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sec-y) 0;position:relative;}
.section-alt{background:var(--ink-950);}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.16em;
  color:var(--amber-500);text-transform:uppercase;margin-bottom:14px;
}
.sec-title{font-size:clamp(24px,3vw,38px);font-weight:700;letter-spacing:-.01em;}
.sec-sub{margin-top:14px;font-size:16px;color:var(--text-2);max-width:640px;}
.section-head.center .sec-sub{margin-left:auto;margin-right:auto;}
.muted{color:var(--text-3);font-size:13px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(13,20,40,.62);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  background:rgba(13,20,40,.94);
  border-bottom-color:var(--line);
  box-shadow:0 14px 30px -26px rgba(0,0,0,.95);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;min-height:72px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:10px;background:rgba(35,211,184,.08);
  border:1px solid rgba(35,211,184,.24);
}
.brand-mark svg{width:20px;height:20px;}
.brand-name{
  font-size:20px;font-weight:800;color:var(--text-1);letter-spacing:-.01em;
  font-family:var(--font-num);white-space:nowrap;
}
.brand-name em{font-style:normal;color:var(--brand-500);}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 12px;font-size:15px;font-weight:500;color:var(--text-2);
  border-radius:var(--r-sm);transition:color .18s ease,background .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand-500);border-radius:2px;transform:scaleX(0);
  transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover,.nav-link:focus{color:var(--text-1);background:rgba(139,166,255,.06);}
.nav-link:hover::after,.nav-link:focus::after{transform:scaleX(1);}
.nav-link.active{color:var(--text-1);}
.nav-link.active::after{transform:scaleX(1);}
.nav-cta{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  padding:13px 22px;border-radius:var(--r-pill);border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease,filter .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand-500);color:#05201C;}
.btn-primary:hover,.btn-primary:focus{
  background:#31E4C8;color:#05201C;transform:translateY(-1px);
  box-shadow:0 0 18px var(--brand-glow);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.94);}
.btn-ghost{background:rgba(139,166,255,.05);border-color:var(--line-strong);color:var(--text-1);}
.btn-ghost:hover,.btn-ghost:focus{border-color:rgba(35,211,184,.55);color:#6DF0DC;transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-lg{padding:17px 30px;font-size:16px;}
.btn-block{width:100%;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);
  background:rgba(139,166,255,.06);border:1px solid var(--line);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-1);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-1);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(8,13,26,.98);
  padding:16px 24px 24px;
}
.mobile-drawer.open{display:block;}
.mobile-drawer .nav-links{display:block;}
.mobile-drawer .nav-link{display:block;padding:13px 4px;border-bottom:1px solid var(--line);border-radius:0;font-size:16px;}
.mobile-drawer .nav-link::after{display:none;}
.mobile-drawer .drawer-cta{display:grid;gap:12px;margin-top:18px;}

/* ============ Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:72px 0 72px;
  background:var(--ink-900);
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center right;
  opacity:.34;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 18% 8%, rgba(35,211,184,.14), transparent 62%),
    linear-gradient(180deg, rgba(13,20,40,.86) 0%, rgba(13,20,40,.94) 55%, var(--ink-900) 100%);
}
.hero-arc{
  position:absolute;right:-160px;top:-120px;width:620px;height:620px;
  border-radius:50%;border:1px solid rgba(217,138,78,.5);
  opacity:.08;pointer-events:none;
}
.hero-arc.two{right:-90px;top:-40px;width:420px;height:420px;border-color:rgba(35,211,184,.6);opacity:.07;}
.breadcrumb{
  position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:28px;
}
.breadcrumb a{color:var(--brand-500);}
.breadcrumb span.sep{color:var(--text-3);}
.hero-narrow{position:relative;max-width:820px;margin:0 auto;text-align:center;}
.hero-narrow h1{
  font-size:clamp(32px,5vw,58px);font-weight:800;line-height:1.1;letter-spacing:-.02em;
}
.hero-narrow .hero-sub{
  max-width:660px;margin:22px auto 0;font-size:17px;line-height:1.8;color:var(--text-2);
}
.hero-actions{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:32px;
}
.hero-stats{
  position:relative;margin-top:56px;
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(21,29,56,.72),rgba(13,20,40,.72));
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  overflow:hidden;
}
.hero-stats li{padding:24px 20px;text-align:center;border-right:1px solid var(--line);}
.hero-stats li:last-child{border-right:0;}
.hero-stats .num{
  font-family:var(--font-num);font-size:30px;font-weight:700;color:var(--lime-400);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.hero-stats .num small{font-size:15px;margin-left:2px;}
.hero-stats .lbl{margin-top:8px;font-size:13px;color:var(--text-3);}

/* ============ 价值条 ============ */
.value-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
}
.value-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:22px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--ink-800);box-shadow:var(--shadow-card),var(--inset);
  transition:transform .18s ease,border-color .18s ease;
}
.value-item:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4);}
.value-ico{
  flex:0 0 40px;width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(35,211,184,.09);border:1px solid rgba(35,211,184,.26);
}
.value-ico svg{width:20px;height:20px;}
.value-item h3{font-size:17px;font-weight:600;}
.value-item p{margin-top:8px;font-size:14px;line-height:1.7;color:var(--text-2);}

/* ============ 服务矩阵 ============ */
.matrix{
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.matrix-card{
  position:relative;
  padding:32px 28px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(30,41,71,.75),rgba(21,29,56,.95));
  box-shadow:var(--shadow-card),var(--inset);
  transition:transform .18s ease,border-color .18s ease;
}
.matrix-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4);}
.matrix-card .idx{
  font-family:var(--font-num);font-size:38px;font-weight:700;color:var(--amber-500);
  opacity:.75;line-height:1;font-variant-numeric:tabular-nums;
}
.matrix-card h3{margin-top:16px;font-size:22px;font-weight:600;}
.matrix-card > p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--text-2);max-width:44ch;}
.matrix-list{margin-top:20px;display:grid;gap:10px;}
.matrix-list li{
  position:relative;padding-left:18px;font-size:14px;color:var(--text-2);
}
.matrix-list li::before{
  content:"";position:absolute;left:0;top:.68em;width:8px;height:2px;border-radius:2px;background:var(--brand-500);
}

/* ============ 图像带 + 摘录 ============ */
.strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:40px;
}
.strip figure{
  margin:0;position:relative;border-radius:var(--r-md);overflow:hidden;
  border:1px solid var(--line);background:rgba(35,211,184,.08);
}
.strip img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease;}
.strip figure:hover img{transform:scale(1.03);}
.strip figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 16px;font-size:13px;color:var(--text-1);
  background:linear-gradient(180deg,rgba(8,13,26,0),rgba(8,13,26,.92));
}
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.quote-card{
  padding:24px;border:1px solid var(--line);border-left:3px solid var(--amber-500);
  border-radius:var(--r-md);background:rgba(217,138,78,.05);
}
.quote-card p{font-size:15px;line-height:1.8;color:var(--text-1);}
.quote-card .who{margin-top:14px;font-size:13px;color:var(--text-3);}

/* ============ 流程 ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.flow-step{
  position:relative;padding:26px 22px;
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--ink-800);box-shadow:var(--shadow-card),var(--inset);
  transition:transform .18s ease,border-color .18s ease;
}
.flow-step:hover{transform:translateY(-2px);border-color:rgba(217,138,78,.45);}
.flow-step .n{
  font-family:var(--font-num);font-size:34px;font-weight:700;color:var(--amber-500);
  line-height:1;font-variant-numeric:tabular-nums;
}
.flow-step h3{margin-top:14px;font-size:18px;font-weight:600;}
.flow-step p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--text-2);}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion{background:transparent;border:0;margin:0;}
.accordion .accordion-item{
  background:var(--ink-800);border:1px solid var(--line);
  border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;
}
.accordion .accordion-item:hover{border-color:var(--line-strong);}
.accordion .accordion-title{
  display:block;position:relative;
  padding:20px 56px 20px 22px;font-size:17px;font-weight:600;color:var(--text-1);
  background:transparent;border:0;line-height:1.5;transition:color .18s ease;
}
.accordion .accordion-title:hover{background:transparent;color:var(--brand-500);}
.accordion .accordion-title::before{
  content:"";position:absolute;right:22px;top:50%;width:11px;height:11px;
  border-right:2px solid var(--text-3);border-bottom:2px solid var(--text-3);
  transform:translateY(-70%) rotate(45deg);transition:transform .2s ease,border-color .2s ease;
}
.accordion .accordion-item.is-active .accordion-title{color:var(--brand-500);box-shadow:inset 3px 0 0 var(--brand-500);}
.accordion .accordion-item.is-active .accordion-title::before{
  border-color:var(--brand-500);transform:translateY(-30%) rotate(-135deg);
}
.accordion .accordion-content{
  display:none;background:rgba(8,13,26,.5);border:0;
  padding:4px 24px 22px 25px;color:var(--text-2);font-size:15px;line-height:1.8;
}
.accordion .accordion-item.is-active > .accordion-content{display:block;}
.accordion .accordion-content p{font-size:15px;line-height:1.8;color:var(--text-2);}

/* ============ 表单 ============ */
.contact-panel{
  max-width:820px;margin:0 auto;
  padding:40px;border:1px solid var(--line-strong);border-radius:var(--r-lg);
  background:linear-gradient(180deg,rgba(21,29,56,.95),rgba(13,20,40,.95));
  box-shadow:var(--shadow-card),var(--inset);
}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:14px;font-weight:600;color:var(--text-1);}
.field input,.field select,.field textarea{
  width:100%;padding:13px 14px;border-radius:var(--r-sm);
  background:var(--ink-950);border:1px solid var(--line);
  color:var(--text-1);font-size:15px;line-height:1.5;
  transition:border-color .18s ease,background .18s ease;
}
.field textarea{min-height:132px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:#5A6685;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);background:#0A1122;
}
.field .hint{font-size:13px;color:var(--text-3);}
.field .error{font-size:13px;color:var(--amber-500);}
.form-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:16px;margin-top:26px;padding-top:24px;border-top:1px solid var(--line);
}
.form-foot .note{font-size:13px;color:var(--text-3);max-width:46ch;}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--ink-950);
  padding:88px 0;
}
.cta-band .ring{
  position:absolute;left:-140px;bottom:-220px;width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(217,138,78,.55);opacity:.08;pointer-events:none;
}
.cta-band .ring.b{left:-60px;bottom:-150px;width:340px;height:340px;border-color:rgba(35,211,184,.6);opacity:.07;}
.cta-band .arc{
  position:absolute;right:-120px;top:-180px;width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(35,211,184,.5);opacity:.07;pointer-events:none;
}
.cta-inner{position:relative;max-width:720px;}
.cta-inner h2{font-size:clamp(24px,3vw,36px);font-weight:700;}
.cta-inner p{margin-top:16px;font-size:16px;color:var(--text-2);max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-950);border-top:1px solid var(--line);
  padding:72px 0 32px;color:var(--text-2);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--text-3);max-width:34ch;}
.footer-col h4{font-size:15px;font-weight:600;color:var(--text-1);margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col li,.footer-col p{font-size:14px;color:var(--text-2);}
.footer-col a{color:var(--text-2);font-size:14px;}
.footer-col a:hover,.footer-col a:focus{color:var(--text-1);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .55s ease,transform .55s ease;}
.reveal.in-view{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  :root{--sec-y:72px;}
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .value-row{grid-template-columns:repeat(2,1fr);}
  .flow{grid-template-columns:repeat(2,1fr);}
  .strip{grid-template-columns:repeat(2,1fr);}
  .quotes{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:768px){
  :root{--sec-y:56px;}
  body{font-size:15px;}
  .header-inner{min-height:60px;}
  .brand-name{font-size:18px;}
  .page-hero{padding:48px 0 56px;}
  .hero-narrow .hero-sub{font-size:16px;}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
  .hero-stats li:nth-child(2){border-right:0;}
  .hero-stats li:nth-child(1),.hero-stats li:nth-child(2){border-bottom:1px solid var(--line);}
  .matrix{grid-template-columns:1fr;}
  .matrix-card{padding:26px 22px;}
  .strip{grid-template-columns:1fr;}
  .contact-panel{padding:26px 20px;}
  .form-grid{grid-template-columns:1fr;}
  .flow{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .grid-container{padding:0 18px;}
  .value-row{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .form-foot .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-stats .num{font-size:26px;}
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
:root{
  --ink-950:#080D1A;
  --ink-900:#0D1428;
  --ink-800:#151D38;
  --ink-700:#1E2947;
  --line:rgba(139,166,255,.14);
  --line-strong:rgba(139,166,255,.28);
  --brand-500:#23D3B8;
  --brand-600:#12A693;
  --brand-glow:rgba(35,211,184,.45);
  --amber-500:#D98A4E;
  --amber-700:#8E5630;
  --lime-400:#D8F35A;
  --text-1:#EAEFF9;
  --text-2:#A6B2CB;
  --text-3:#6B7896;
  --success:#3ECF8E;
  --warn:#E9A03B;
  --danger:#E4574C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.9);
  --sec-y:96px;
  --num-font:"Barlow Condensed","HarmonyOS Sans","PingFang SC","Microsoft YaHei",sans-serif;
}
@media (max-width:1024px){ :root{--sec-y:72px;} }
@media (max-width:640px){ :root{--sec-y:56px;} }

/* ===== 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text-2);
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--brand-500);text-decoration:none;transition:color .18s ease,border-color .18s ease;}
a:hover{color:#5EE6D0;}
h1,h2,h3,h4{margin:0;color:var(--text-1);line-height:1.2;letter-spacing:-.01em;}
h1{font-size:clamp(32px,5vw,58px);font-weight:800;line-height:1.1;letter-spacing:-.02em;}
h2{font-size:clamp(24px,3vw,38px);font-weight:700;}
h3{font-size:21px;font-weight:600;}
h4{font-size:17px;font-weight:600;}
p{margin:0 0 14px;max-width:42em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(35,211,184,.28);color:#fff;}

/* Foundation 覆盖 */
.grid-container{max-width:1200px;padding-left:24px;padding-right:24px;}
@media (max-width:640px){ .grid-container{padding-left:18px;padding-right:18px;} }
.button,.button:hover{font-family:inherit;}

/* ===== 通用 ===== */
.section{padding:var(--sec-y) 0;position:relative;}
.section-head{max-width:720px;margin-bottom:48px;}
.section-head h2{margin:14px 0 16px;}
.section-head p{color:var(--text-2);font-size:16px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--amber-500);text-transform:uppercase;
}
.eyebrow i{width:18px;height:1px;background:var(--amber-500);display:block;}
.section-alt{background:var(--ink-950);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease,filter .18s ease;
}
.btn-primary{background:var(--brand-500);color:#04120F;}
.btn-primary:hover{background:var(--brand-500);color:#04120F;filter:brightness(1.08);box-shadow:0 0 18px var(--brand-glow);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);filter:brightness(.94);box-shadow:none;}
.btn-ghost{border-color:var(--line-strong);color:var(--text-1);background:transparent;}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-500);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-lg{height:56px;padding:0 30px;font-size:16px;}
.btn-amber{border-color:rgba(217,138,78,.5);color:var(--amber-500);background:transparent;}
.btn-amber:hover{border-color:var(--amber-500);color:#EFB184;transform:translateY(-1px);}

/* ===== 顶栏 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:72px;display:flex;align-items:center;
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,backdrop-filter .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(8,13,26,.84);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);}
.brand:hover{color:var(--text-1);}
.brand-mark{width:26px;height:26px;display:inline-flex;}
.brand-mark svg{width:100%;height:100%;}
.brand-name{font-size:20px;font-weight:800;letter-spacing:-.01em;}
.brand-name em{font-style:normal;color:var(--brand-500);}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);
  padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--brand-500);transition:width .22s ease;
}
.nav-link:hover,.nav-link.active{color:var(--text-1);}
.nav-link:hover::after,.nav-link.active::after{width:100%;}
.nav-cta{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line-strong);background:transparent;cursor:pointer;
  align-items:center;justify-content:center;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-1);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* 抽屉 */
.nav-drawer{
  position:fixed;inset:0;z-index:80;background:rgba(8,13,26,.7);
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
  opacity:0;pointer-events:none;transition:opacity .25s ease;
}
.nav-drawer.is-open{opacity:1;pointer-events:auto;}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:min(330px,86vw);
  background:var(--ink-950);border-left:1px solid var(--line);
  padding:20px;display:flex;flex-direction:column;gap:18px;
  transform:translateX(100%);transition:transform .28s ease;
}
.nav-drawer.is-open .drawer-panel{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{
  width:36px;height:36px;border-radius:var(--r-sm);border:1px solid var(--line-strong);
  background:transparent;color:var(--text-2);cursor:pointer;font-size:20px;line-height:1;
}
.drawer-close:hover{color:var(--text-1);border-color:var(--brand-500);}
.drawer-links{display:flex;flex-direction:column;}
.drawer-links a{
  color:var(--text-2);font-size:16px;font-weight:500;padding:14px 4px;
  border-bottom:1px solid var(--line);
}
.drawer-links a:hover,.drawer-links a.active{color:var(--brand-500);}
.drawer-cta{margin-top:auto;display:flex;flex-direction:column;gap:12px;}
.drawer-cta .btn{width:100%;}

/* ===== Hero ===== */
.page-hero{
  position:relative;padding:150px 0 96px;overflow:hidden;
  background-color:var(--ink-950);
  background-image:linear-gradient(180deg,rgba(8,13,26,.88) 0%,rgba(13,20,40,.94) 62%,var(--ink-900) 100%),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;right:-160px;top:-120px;width:640px;height:640px;
  border-radius:50%;pointer-events:none;
  background:radial-gradient(circle at 50% 50%,rgba(35,211,184,.07) 0%,transparent 62%);
}
.page-hero::after{
  content:"";position:absolute;left:-120px;bottom:-220px;width:520px;height:520px;
  border-radius:50%;pointer-events:none;
  background:radial-gradient(circle at 50% 50%,rgba(217,138,78,.06) 0%,transparent 62%);
}
.page-hero .grid-container{position:relative;z-index:2;}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:28px;}
.breadcrumb a{color:var(--brand-500);font-size:13px;}
.breadcrumb span.sep{color:var(--text-3);}
.breadcrumb .current{color:var(--text-3);}
.hero-row{align-items:center;}
.hero-copy h1{margin:16px 0 20px;}
.hero-lead{font-size:17px;max-width:560px;color:var(--text-2);margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-2);
  background:transparent;border:1px solid var(--line-strong);
}
.tag.is-amber{color:var(--amber-500);border-color:rgba(217,138,78,.36);}
.hero-metrics{
  display:grid;grid-template-columns:1fr 1fr;gap:22px;
  padding:28px;border-radius:var(--r-lg);
  background:rgba(21,29,56,.55);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card);
}
.metric{display:flex;flex-direction:column;gap:6px;}
.metric-value{
  font-family:var(--num-font);font-size:28px;font-weight:700;
  color:var(--lime-400);font-variant-numeric:tabular-nums;line-height:1.1;
}
.metric-value small{font-size:14px;color:var(--text-2);font-family:inherit;font-weight:500;margin-left:2px;}
.metric-label{font-size:13px;color:var(--text-3);line-height:1.5;}

/* ===== Zigzag ===== */
.zigzag-wrap{padding-top:24px;}
.zigzag{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;
  padding:64px 0;border-top:1px solid var(--line);
}
.zigzag:first-child{border-top:0;padding-top:16px;}
.zz-num{
  font-family:var(--num-font);font-size:64px;font-weight:700;line-height:.9;
  color:var(--amber-500);opacity:.92;letter-spacing:-.02em;
  display:block;margin-bottom:10px;
}
.zz-body h3{margin:6px 0 14px;font-size:24px;}
.zz-body p{color:var(--text-2);margin-bottom:18px;}
.zz-list{display:flex;flex-direction:column;gap:10px;margin-top:18px;}
.zz-list li{
  position:relative;padding-left:22px;font-size:15px;color:var(--text-2);line-height:1.7;
}
.zz-list li::before{
  content:"";position:absolute;left:0;top:10px;width:8px;height:8px;
  border-radius:2px;background:var(--amber-500);opacity:.85;
}
.zz-media{position:relative;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);}
.zz-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .45s ease;}
.zz-media:hover img{transform:scale(1.03);}
.zz-media figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:14px 16px;
  font-size:13px;color:var(--text-2);
  background:linear-gradient(180deg,transparent,rgba(8,13,26,.9));
}
.zigzag-alt .zz-media{order:-1;}

/* ===== 流程 ===== */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;}
.flow-step{
  position:relative;padding:26px 20px;border-radius:var(--r-md);
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card);transition:transform .2s ease,border-color .2s ease;
}
.flow-step:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4);}
.flow-num{
  display:block;font-family:var(--num-font);font-size:22px;font-weight:700;
  color:var(--brand-500);margin-bottom:12px;font-variant-numeric:tabular-nums;
}
.flow-step h3{font-size:17px;margin-bottom:8px;}
.flow-step p{font-size:14px;color:var(--text-2);line-height:1.7;}

/* ===== 场景卡 ===== */
.scene-card{
  height:100%;padding:26px 22px;border-radius:var(--r-md);
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease;
}
.scene-card:hover{transform:translateY(-2px);border-color:rgba(35,211,184,.4);}
.scene-card h3{font-size:18px;margin-bottom:10px;}
.scene-card p{font-size:14.5px;color:var(--text-2);}
.scene-badge{
  display:inline-block;margin-bottom:14px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;color:var(--amber-500);border:1px solid rgba(217,138,78,.36);
}

/* ===== 反馈摘录 ===== */
.quote-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.quote-card{
  display:flex;flex-direction:column;gap:14px;
  padding:26px 24px;border-radius:var(--r-md);
  background:var(--ink-800);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.quote-mark{font-family:var(--num-font);font-size:34px;line-height:1;color:var(--amber-500);opacity:.8;}
.quote-card p{font-size:14.5px;color:var(--text-2);line-height:1.8;flex:1;}
.quote-meta{display:flex;align-items:center;gap:12px;padding-top:14px;border-top:1px solid var(--line);}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 40px;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--brand-500);
  background:rgba(35,211,184,.1);border:1px solid rgba(35,211,184,.28);
}
.quote-meta strong{display:block;font-size:15px;color:var(--text-1);font-weight:600;}
.quote-meta span{font-size:12px;color:var(--text-3);}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;}
.accordion{background:transparent;border:0;margin:0;}
.accordion-item{
  background:var(--ink-800);border:1px solid var(--line);
  border-radius:var(--r-md);margin-bottom:12px;overflow:hidden;
  transition:border-color .2s ease;
}
.accordion-item:hover{border-color:var(--line-strong);}
.accordion-item.is-active{border-color:rgba(35,211,184,.42);}
.accordion-title{
  position:relative;background:transparent;border:0;
  color:var(--text-1);font-size:17px;font-weight:600;
  padding:20px 60px 20px 24px;line-height:1.5;
}
.accordion-title:hover,.accordion-title:focus{background:rgba(35,211,184,.05);color:var(--text-1);}
.accordion-title::before{
  right:24px;top:50%;margin-top:-11px;color:var(--brand-500);font-size:18px;font-weight:600;
}
.accordion-item.is-active > .accordion-title{color:var(--brand-500);}
.accordion-item.is-active > .accordion-title::after{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:var(--brand-500);border-radius:0 2px 2px 0;
}
.accordion-content{
  background:transparent;border:0;color:var(--text-2);
  padding:0 24px 22px;font-size:15px;line-height:1.85;
}
.accordion-content p{margin-bottom:10px;}

/* ===== CTA 带 ===== */
.cta-band{
  position:relative;overflow:hidden;
  padding:80px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background-color:var(--ink-950);
  background-image:linear-gradient(120deg,rgba(8,13,26,.92) 0%,rgba(13,20,40,.88) 100%),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.cta-band::before{
  content:"";position:absolute;right:-100px;top:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(35,211,184,.08) 0%,transparent 60%);
}
.cta-band::after{
  content:"";position:absolute;left:-140px;bottom:-200px;width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(217,138,78,.06) 0%,transparent 60%);
}
.cta-inner{position:relative;z-index:2;max-width:720px;}
.cta-inner h2{margin:14px 0 16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.cta-note{font-size:13px;color:var(--text-3);margin-top:18px;}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink-950);border-top:1px solid var(--line);padding:72px 0 30px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:340px;margin-top:16px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text-1);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li a{font-size:14px;color:var(--text-2);}
.footer-col li a:hover{color:var(--text-1);}
.footer-col p{font-size:14px;color:var(--text-2);margin-bottom:8px;}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ===== 入场动画 ===== */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* ===== 响应式 ===== */
@media (max-width:1200px){
  .nav-links{gap:20px;}
}
@media (max-width:1024px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
  .page-hero{padding-top:120px;padding-bottom:72px;}
  .zigzag{gap:40px;}
  .flow{grid-template-columns:repeat(3,1fr);}
  .quote-row{grid-template-columns:1fr;gap:16px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:860px){
  .zigzag{grid-template-columns:1fr;gap:28px;padding:44px 0;}
  .zigzag-alt .zz-media{order:0;}
  .zz-num{font-size:52px;}
  .hero-metrics{grid-template-columns:1fr 1fr;padding:22px;gap:18px;}
}
@media (max-width:640px){
  body{font-size:15.5px;}
  .site-header{height:60px;}
  .brand-name{font-size:18px;}
  .page-hero{padding-top:100px;padding-bottom:56px;}
  .hero-lead{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .hero-metrics{grid-template-columns:1fr 1fr;gap:16px;padding:20px;}
  .metric-value{font-size:24px;}
  .flow{grid-template-columns:1fr;}
  .section-head{margin-bottom:32px;}
  .cta-band{padding:56px 0;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .accordion-title{font-size:16px;padding:18px 52px 18px 18px;}
  .accordion-content{padding:0 18px 20px;}
}