/* roulang page: index */
:root{
  --ink-950:#0A0D10;
  --ink-900:#10151A;
  --ink-800:#171E25;
  --ink-700:#212A33;
  --brand:#17E0A8;
  --brand-deep:#0FB98C;
  --accent:#FFB23F;
  --text:#F1F5F4;
  --muted:#9BA6AA;
  --line:rgba(255,255,255,.08);
  --paper:#F4F5F2;
  --paper-ink:#12171C;
  --paper-muted:#5C666D;
  --r-tag:4px;
  --r-card:10px;
  --r-panel:16px;
  --r-pill:999px;
  --container:1200px;
  --shadow-deep:0 0 0 1px rgba(255,255,255,.07), 0 18px 44px -22px rgba(0,0,0,.85);
  --shadow-light:0 2px 10px rgba(16,24,32,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
  --gap-section:clamp(72px,9vw,128px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"Noto Sans SC","HarmonyOS Sans",system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
::selection{background:var(--brand);color:#04140F;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.section{padding:var(--gap-section) 0;position:relative;}
.section-paper{background:var(--paper);color:var(--paper-ink);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-title{font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.25;letter-spacing:-.01em;}
.section-sub{margin-top:12px;color:var(--muted);font-size:15px;max-width:620px;}
.section-paper .section-sub{color:var(--paper-muted);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px;}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--brand);display:block;}
.section-paper .eyebrow{color:var(--brand-deep);}
.section-paper .eyebrow::before{background:var(--brand-deep);}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(10,13,16,.86);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-stuck{background:rgba(10,13,16,.94);border-bottom-color:var(--line);}
.nav{height:64px;display:flex;align-items:center;gap:18px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;border-radius:9px;
  background:linear-gradient(140deg,var(--brand),#0B8E6C);
  display:grid;place-items:center;
  box-shadow:0 0 0 1px rgba(23,224,168,.35), 0 8px 20px -12px rgba(23,224,168,.7);
}
.brand-mark svg{width:18px;height:18px;display:block;}
.brand-text{font-weight:800;font-size:16.5px;letter-spacing:.01em;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1 1 auto;}
.nav-link{
  position:relative;padding:10px 12px;border-radius:8px;
  font-size:14.5px;color:var(--muted);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-link.is-active{color:var(--brand);}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-search{position:relative;width:220px;}
.nav-search input{
  width:100%;height:40px;border-radius:var(--r-card);
  background:var(--ink-700);border:1px solid var(--line);
  padding:0 14px 0 36px;font-size:14px;color:var(--text);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-search input::placeholder{color:#7C868B;}
.nav-search input:focus{outline:none;border-color:var(--brand);background:var(--ink-800);}
.nav-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);}
.nav-login{font-size:14.5px;color:var(--muted);padding:8px 10px;border-radius:8px;transition:color .2s var(--ease);}
.nav-login:hover{color:var(--brand);}
.nav-burger{
  display:none;width:44px;height:44px;border-radius:var(--r-card);
  border:1px solid var(--line);place-items:center;gap:4px;flex-direction:column;justify-content:center;
}
.nav-burger span{display:block;width:18px;height:1.5px;background:var(--text);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease);}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg);}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);}

/* ---------- buttons ---------- */
.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;white-space:nowrap;
  transition:transform .18s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-sm{height:38px;padding:0 18px;font-size:14px;}
.btn-primary{background:var(--brand);color:#04140F;box-shadow:0 12px 28px -16px rgba(23,224,168,.9);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:rgba(255,255,255,.18);color:var(--text);background:transparent;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-dark{background:var(--paper-ink);color:#F4F5F2;}
.btn-dark:hover{background:#000;transform:translateY(-1px);}
.btn-outline-dark{border-color:rgba(18,23,28,.22);color:var(--paper-ink);}
.btn-outline-dark:hover{border-color:var(--paper-ink);transform:translateY(-1px);}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;color:var(--brand);font-weight:600;padding:6px 2px;}
.btn-text .arrow{transition:transform .2s var(--ease);}
.btn-text:hover .arrow{transform:translateX(5px);}
.btn-block{width:100%;}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;}
.btn.is-loading{opacity:.7;pointer-events:none;}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:var(--r-tag);
  font-size:12px;line-height:1.7;letter-spacing:.04em;
  color:var(--brand);border:1px solid rgba(23,224,168,.45);
  background:rgba(23,224,168,.06);white-space:nowrap;
}
.tag-accent{color:var(--accent);border-color:rgba(255,179,63,.45);background:rgba(255,179,63,.08);}
.badge{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.06em;
  background:var(--brand);color:#04140F;
}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  min-height:min(88vh,780px);display:flex;align-items:center;
  background-color:var(--ink-900);
  background-image:linear-gradient(100deg,rgba(6,9,12,.88) 0%,rgba(8,12,15,.78) 46%,rgba(10,13,16,.62) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:140px;
  background:linear-gradient(180deg,rgba(10,13,16,0) 0%,var(--ink-950) 100%);
}
.hero-inner{position:relative;z-index:2;padding:96px 0 104px;max-width:760px;}
.hero-kicker{
  display:inline-flex;align-items:center;gap:10px;
  padding:6px 14px 6px 8px;border-radius:var(--r-pill);
  background:rgba(23,224,168,.1);border:1px solid rgba(23,224,168,.32);
  font-size:13px;color:var(--brand);margin-bottom:24px;
}
.hero-kicker i{width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(23,224,168,.18);display:block;}
.hero h1{
  font-size:clamp(38px,5.2vw,64px);
  font-weight:900;line-height:1.1;letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-lead{font-size:clamp(17px,1.6vw,19px);line-height:1.7;color:#CFD8D7;max-width:560px;margin-bottom:34px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:44px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:14px 44px;}
.hero-stat{display:flex;flex-direction:column;gap:2px;}
.hero-stat b{font-size:26px;font-weight:800;letter-spacing:-.01em;line-height:1.2;}
.hero-stat span{font-size:13px;color:var(--muted);}
.hero-scroll{
  position:absolute;right:32px;bottom:38px;z-index:3;
  display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--muted);letter-spacing:.12em;
}
.hero-scroll i{display:block;width:1px;height:34px;background:linear-gradient(180deg,var(--brand),transparent);animation:drop 2.2s infinite;}
@keyframes drop{0%{opacity:0;transform:translateY(-8px);}40%{opacity:1;}100%{opacity:0;transform:translateY(8px);}}

/* ---------- anchor bar ---------- */
.anchor-wrap{position:sticky;top:64px;z-index:110;padding:14px 0;background:linear-gradient(180deg,rgba(10,13,16,.96) 60%,rgba(10,13,16,0));}
.anchor-bar{
  display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;
  padding:6px;border-radius:var(--r-pill);
  background:rgba(23,30,37,.86);border:1px solid var(--line);
}
.anchor-bar::-webkit-scrollbar{display:none;}
.anchor-bar a{
  flex:0 0 auto;padding:8px 18px;border-radius:var(--r-pill);
  font-size:14px;color:var(--muted);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.anchor-bar a:hover{color:var(--text);}
.anchor-bar a.is-current{background:var(--brand);color:#04140F;font-weight:600;}

/* ---------- features ---------- */
.feature-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:48px;align-items:start;}
.feature-list{display:flex;flex-direction:column;}
.feature-item{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:18px;
  padding:24px 0;border-top:1px solid var(--line);
  transition:background .2s var(--ease);
}
.feature-item:first-child{border-top:0;padding-top:0;}
.feature-item:hover .feature-num{color:var(--brand);}
.feature-num{font-size:26px;font-weight:800;color:#39424B;letter-spacing:-.02em;line-height:1.2;transition:color .25s var(--ease);}
.feature-item h3{font-size:19px;font-weight:700;margin-bottom:6px;}
.feature-item p{color:var(--muted);font-size:14.6px;line-height:1.8;}
.feature-visual{
  position:sticky;top:130px;
  border-radius:var(--r-panel);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-deep);
  background:var(--ink-800);
}
.feature-visual img{width:100%;aspect-ratio:4/5;object-fit:cover;}
.feature-visual figcaption{
  padding:16px 20px;font-size:13.5px;color:var(--muted);
  border-top:1px solid var(--line);background:var(--ink-900);
}

/* ---------- demo ---------- */
.demo-grid{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:44px;align-items:start;}
.demo-stage{position:relative;border-radius:var(--r-panel);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-deep);}
.demo-stage img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.demo-float{
  position:absolute;left:22px;bottom:22px;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:var(--r-pill);
  background:rgba(10,13,16,.86);border:1px solid rgba(23,224,168,.4);
  font-size:13px;color:var(--brand);
}
.demo-float i{width:6px;height:6px;border-radius:50%;background:var(--brand);display:block;}
.step-list{display:flex;flex-direction:column;gap:4px;}
.step-item{padding:16px 0;border-bottom:1px solid var(--line);}
.step-item:last-child{border-bottom:0;}
.step-item b{display:block;font-size:15.5px;font-weight:700;margin-bottom:4px;}
.step-item b span{color:var(--brand);margin-right:8px;font-variant-numeric:tabular-nums;}
.step-item p{font-size:14px;color:var(--muted);line-height:1.75;}

/* ---------- proof ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  border:1px solid var(--line);border-radius:var(--r-panel);
  background:var(--ink-900);overflow:hidden;margin-bottom:48px;
}
.stat-cell{padding:28px 24px;border-right:1px solid var(--line);}
.stat-cell:last-child{border-right:0;}
.stat-cell b{display:block;font-size:clamp(30px,3.4vw,42px);font-weight:800;line-height:1.1;letter-spacing:-.02em;color:var(--brand);}
.stat-cell span{display:block;margin-top:8px;font-size:13.5px;color:var(--muted);}
.rail{
  display:grid;grid-auto-flow:column;grid-auto-columns:minmax(300px,1fr);gap:20px;
  overflow-x:auto;padding-bottom:8px;
  scroll-snap-type:x mandatory;scrollbar-width:none;
}
.rail::-webkit-scrollbar{display:none;}
.quote-card{
  scroll-snap-align:start;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:26px;display:flex;flex-direction:column;gap:18px;
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.quote-card:hover{border-color:rgba(23,224,168,.35);transform:translateY(-3px);}
.quote-text{font-size:15px;line-height:1.85;color:#DCE3E2;}
.quote-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:16px;border-top:1px solid var(--line);}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(140deg,#1E2A33,#0E141A);
  display:grid;place-items:center;font-size:14px;font-weight:700;color:var(--brand);
  border:1px solid var(--line);
}
.quote-name{font-size:14px;font-weight:600;}
.quote-tag{font-size:12px;color:var(--muted);}

/* ---------- plans ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:stretch;}
.plan-card{
  background:#fff;border:1px solid rgba(18,23,28,.1);border-radius:var(--r-panel);
  padding:30px 26px;display:flex;flex-direction:column;gap:18px;
  box-shadow:var(--shadow-light);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.plan-card:hover{transform:translateY(-3px);border-color:rgba(15,185,140,.5);}
.plan-card.is-featured{transform:translateY(-12px);border:1.5px solid var(--brand-deep);box-shadow:0 18px 40px -24px rgba(15,185,140,.7);}
.plan-card.is-featured:hover{transform:translateY(-14px);}
.plan-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.plan-name{font-size:18px;font-weight:800;color:var(--paper-ink);}
.plan-desc{font-size:14px;color:var(--paper-muted);line-height:1.8;}
.plan-list{display:flex;flex-direction:column;gap:12px;padding-top:6px;}
.plan-list li{display:flex;gap:10px;font-size:14.5px;color:#2C353C;line-height:1.7;}
.plan-list li::before{content:"";flex:0 0 auto;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--brand-deep);}
.plan-foot{margin-top:auto;padding-top:20px;border-top:1px solid rgba(18,23,28,.1);}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.news-card{
  display:flex;flex-direction:column;
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--r-panel);
  overflow:hidden;
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.news-card:hover{border-color:rgba(23,224,168,.4);transform:translateY(-3px);}
.news-thumb{background:var(--ink-700);}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{
  font-size:17px;font-weight:700;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-desc{
  font-size:14px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-time{margin-top:auto;padding-top:12px;font-size:12.5px;color:#7C868B;letter-spacing:.04em;}
.empty-state{
  grid-column:1/-1;
  border:1px dashed var(--line);border-radius:var(--r-panel);
  padding:52px 24px;text-align:center;color:var(--muted);
  display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{width:34px;height:34px;color:#4A555C;}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--ink-900);overflow:hidden;
  transition:border-color .22s var(--ease),background .22s var(--ease);
}
.faq-item.is-open{border-color:rgba(23,224,168,.4);background:var(--ink-800);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 22px;text-align:left;position:relative;
}
.faq-q h3{font-size:16.5px;font-weight:600;line-height:1.6;}
.faq-item.is-open .faq-q h3{color:var(--brand);}
.faq-plus{
  flex:0 0 auto;width:26px;height:26px;position:relative;
  border-radius:50%;border:1px solid var(--line);
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;left:50%;top:50%;background:var(--muted);transform:translate(-50%,-50%);}
.faq-plus::before{width:11px;height:1.5px;}
.faq-plus::after{width:1.5px;height:11px;}
.faq-item.is-open .faq-plus{transform:rotate(45deg);border-color:var(--brand);}
.faq-item.is-open .faq-plus::before,.faq-item.is-open .faq-plus::after{background:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);}
.faq-a-inner{
  padding:0 22px 22px 25px;font-size:14.8px;color:var(--muted);line-height:1.85;
  border-left:3px solid var(--brand);margin-left:22px;
}

/* ---------- cta band ---------- */
.cta-band{
  background-color:var(--ink-900);
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:34px 34px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  text-align:center;padding:clamp(64px,7vw,96px) 0;
}
.cta-band h2{font-size:clamp(26px,3.2vw,38px);font-weight:800;line-height:1.25;letter-spacing:-.01em;margin-bottom:14px;}
.cta-band p{color:var(--muted);font-size:15.5px;max-width:560px;margin:0 auto 32px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-950);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2.4fr));gap:40px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-text{font-size:14px;color:var(--muted);line-height:1.85;max-width:340px;}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.06em;margin-bottom:18px;color:var(--text);}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{font-size:14px;color:var(--muted);}
.footer-contact .num{color:var(--text);}
.footer-bar{
  margin-top:56px;border-top:1px solid var(--line);
  padding:24px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:#6E787D;
}
.footer-bar span{letter-spacing:.02em;}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:130;
  display:inline-flex;align-items:center;gap:14px;
  padding:8px 8px 8px 20px;border-radius:var(--r-pill);
  background:rgba(23,30,37,.95);border:1px solid var(--line);
  box-shadow:var(--shadow-deep);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
}
.float-cta span{font-size:13.5px;color:var(--muted);}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.mobile-cta{display:none;}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,7,9,.62);z-index:140;
  opacity:0;transition:opacity .25s var(--ease);
}
.drawer-mask.is-open{opacity:1;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:320px;max-width:86vw;z-index:150;
  background:var(--ink-900);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;padding:18px 20px 24px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-close{width:44px;height:44px;border-radius:var(--r-card);border:1px solid var(--line);font-size:22px;line-height:1;color:var(--muted);}
.drawer-close:hover{color:var(--text);border-color:rgba(255,255,255,.24);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;margin-bottom:22px;}
.drawer-nav a{padding:13px 14px;border-radius:var(--r-card);font-size:15px;color:var(--muted);transition:background .2s var(--ease),color .2s var(--ease);}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--ink-800);color:var(--brand);}
.drawer-search{margin-bottom:auto;}
.drawer-search input{width:100%;height:44px;border-radius:var(--r-card);background:var(--ink-700);border:1px solid var(--line);padding:0 14px;font-size:14px;}
.drawer-search input:focus{outline:none;border-color:var(--brand);}
.drawer-cta{margin-top:20px;width:100%;}

/* ---------- misc ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
.progress-bar{position:fixed;top:0;left:0;height:2px;width:0;background:var(--brand);z-index:200;transition:width .1s linear;}
section[id]{scroll-margin-top:88px;}

@media (max-width:1280px){
  .container{padding:0 28px;}
  .nav-menu{gap:0;}
  .nav-search{width:180px;}
}
@media (max-width:1024px){
  .nav-menu,.nav-search,.nav-login{display:none;}
  .nav-burger{display:flex;}
  .nav{justify-content:space-between;}
  .feature-grid{grid-template-columns:1fr;gap:36px;}
  .feature-visual{position:static;}
  .feature-visual img{aspect-ratio:16/9;}
  .demo-grid{grid-template-columns:1fr;gap:32px;}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat-cell:nth-child(2){border-right:0;}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line);}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .plan-grid{grid-template-columns:1fr;gap:20px;}
  .plan-card.is-featured{transform:none;border-width:1.5px;}
  .plan-card.is-featured:hover{transform:translateY(-3px);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .hero-inner{padding:64px 0 84px;}
  .hero{min-height:auto;}
  .hero-scroll{display:none;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{flex:1 1 auto;}
  .anchor-wrap{top:56px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px;}
  .news-grid{grid-template-columns:1fr;}
  .news-card{flex-direction:column;}
  .rail{grid-auto-columns:82%;}
  .float-cta{display:none;}
  .mobile-cta{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:fixed;left:0;right:0;bottom:0;z-index:130;
    height:56px;padding:0 16px;
    background:rgba(16,21,26,.97);border-top:1px solid var(--line);
  }
  .mobile-cta .btn{height:40px;padding:0 20px;font-size:14px;}
  body{padding-bottom:72px;}
  .faq-a-inner{margin-left:16px;padding:0 18px 20px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bar{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .hero h1{font-size:clamp(30px,8.6vw,38px);}
  .hero-lead{font-size:15.5px;}
  .hero-stats{gap:12px 28px;}
  .hero-stat b{font-size:22px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-cell{border-right:0;border-bottom:1px solid var(--line);}
  .stat-cell:last-child{border-bottom:0;}
  .feature-item{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:20px 0;}
  .feature-num{font-size:20px;}
  .quote-card{padding:20px;}
  .plan-card{padding:24px 20px;}
  .cta-actions .btn{width:100%;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink-950:#0A0D10;
  --ink-900:#10151A;
  --ink-800:#171E25;
  --ink-700:#212A33;
  --brand:#17E0A8;
  --brand-deep:#0FB98C;
  --accent:#FFB23F;
  --text:#F1F5F4;
  --muted:#9BA6AA;
  --line:rgba(255,255,255,.08);
  --paper:#F4F5F2;
  --paper-ink:#12171C;
  --paper-muted:#5D6771;
  --r-tag:4px;
  --r-card:10px;
  --r-panel:16px;
  --r-pill:999px;
  --shadow-deep:0 0 0 1px rgba(255,255,255,.07),0 18px 44px -22px rgba(0,0,0,.85);
  --shadow-paper:0 2px 10px rgba(16,24,32,.06);
  --gap-section:clamp(72px,9vw,128px);
  --font-cn:"Noto Sans SC","HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Inter","Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.num,.mono{font-family:var(--font-num);font-variant-numeric:tabular-nums;}
::selection{background:var(--brand);color:#04140F;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

/* ============ 进度条 ============ */
.read-progress{
  position:fixed;top:0;left:0;height:2px;width:0;
  background:var(--brand);z-index:120;transition:width .12s linear;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(10,13,16,.86);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,13,16,.94);
  border-bottom-color:var(--line);
}
.header-inner{
  height:64px;display:flex;align-items:center;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:26px;height:26px;border-radius:8px;background:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-mark svg{width:16px;height:16px;display:block;}
.brand-text{
  font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;
}
.nav-menu{display:flex;align-items:center;gap:22px;flex:1 1 auto;}
.nav-link{
  position:relative;font-size:14.5px;color:var(--muted);
  padding:6px 0;transition:color .2s var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:transparent;transition:background .2s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{background:var(--line);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{height:2px;background:var(--brand);}
.header-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.search-box{position:relative;}
.search-box input{
  width:220px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:var(--ink-800);padding:0 14px 0 34px;font-size:13.5px;
  color:var(--text);outline:none;transition:border-color .2s var(--ease),background .2s var(--ease);
}
.search-box input::placeholder{color:#6E797E;}
.search-box input:focus{border-color:var(--brand);background:var(--ink-700);}
.search-box .search-icon{
  position:absolute;left:11px;top:50%;transform:translateY(-50%);
  width:14px;height:14px;stroke:var(--muted);fill:none;stroke-width:1.8;
}
.btn-text{
  font-size:14px;color:var(--muted);transition:color .2s var(--ease);white-space:nowrap;
}
.btn-text:hover{color:var(--brand);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);font-weight:700;letter-spacing:.02em;
  transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);color:#04140F;padding:10px 22px;font-size:14px;
}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  border:1px solid var(--line);color:var(--text);padding:10px 22px;font-size:14px;background:transparent;
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-lg{padding:14px 30px;font-size:15px;}
.btn:focus-visible,.nav-link:focus-visible,.btn-text:focus-visible,a:focus-visible{
  outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;
}
.menu-toggle{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  display:none;align-items:center;justify-content:center;
}
.menu-toggle span{display:block;width:18px;height:1.6px;background:var(--text);position:relative;}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--text);
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,7,9,.66);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease);z-index:110;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:320px;max-width:86vw;
  background:var(--ink-900);border-left:1px solid var(--line);z-index:111;
  transform:translateX(100%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line);}
.drawer-close{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--muted);
}
.drawer-body{padding:18px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;flex:1;}
.drawer-body .nav-link{padding:12px 6px;font-size:15px;border-bottom:1px solid var(--line);}
.drawer-body .nav-link::after{display:none;}
.drawer-search{margin:4px 0 10px;}
.drawer-search input{width:100%;height:44px;border-radius:10px;border:1px solid var(--line);background:var(--ink-800);padding:0 14px;font-size:14px;color:var(--text);outline:none;}
.drawer-search input:focus{border-color:var(--brand);}
.drawer-foot{padding:18px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ============ 面包屑 ============ */
.crumb-bar{padding:26px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
.crumb a{color:var(--muted);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{opacity:.5;}
.crumb .current{color:var(--muted);opacity:.85;max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.tag-pill{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border:1px solid rgba(23,224,168,.45);border-radius:var(--r-pill);
  font-size:12px;color:var(--brand);letter-spacing:.04em;background:rgba(23,224,168,.06);
}

/* ============ 文章头部 ============ */
.article-head{padding:22px 0 0;}
.article-head h1{
  font-size:clamp(30px,4.4vw,46px);line-height:1.25;font-weight:900;letter-spacing:-.02em;
  max-width:20ch;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;margin-top:20px;
  font-size:13px;color:var(--muted);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line);}
.article-cover{
  margin-top:32px;border-radius:var(--r-panel);overflow:hidden;
  border:1px solid var(--line);background:var(--ink-800);
  box-shadow:var(--shadow-deep);
}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}

/* ============ 布局 ============ */
.article-wrap{
  display:grid;grid-template-columns:minmax(0,760px) 300px;
  gap:56px;justify-content:center;padding:var(--gap-section) 0;
}
.article-main{min-width:0;}

/* 正文排版 */
.article-body{font-size:16px;line-height:1.9;color:#DDE4E2;}
.article-body>*+*{margin-top:20px;}
.article-body p{color:#DDE4E2;}
.article-body h2{
  font-size:24px;font-weight:700;line-height:1.5;color:var(--text);
  margin-top:44px;padding-left:14px;border-left:3px solid var(--brand);
  scroll-margin-top:96px;
}
.article-body h3{font-size:19px;font-weight:600;line-height:1.6;color:var(--text);margin-top:32px;}
.article-body h4{font-size:16.5px;font-weight:700;color:var(--text);margin-top:24px;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(23,224,168,.35);transition:border-color .2s var(--ease);}
.article-body a:hover{border-bottom-color:var(--brand);}
.article-body strong{color:var(--text);font-weight:700;}
.article-body ul,.article-body ol{margin-top:18px;padding-left:22px;}
.article-body ul{list-style:none;}
.article-body ul li{position:relative;padding-left:16px;margin-top:10px;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.78em;width:6px;height:6px;border-radius:2px;background:var(--brand);
}
.article-body ol{list-style:decimal;}
.article-body ol li{margin-top:10px;padding-left:6px;}
.article-body ol li::marker{color:var(--brand);font-family:var(--font-num);}
.article-body blockquote{
  border-left:3px solid var(--accent);background:var(--ink-800);
  border-radius:0 var(--r-card) var(--r-card) 0;padding:18px 22px;color:#CFD7D5;
}
.article-body blockquote p{margin:0;}
.article-body img{border-radius:var(--r-card);border:1px solid var(--line);margin-top:24px;}
.article-body figure{margin:24px 0 0;}
.article-body figcaption{font-size:13px;color:var(--muted);margin-top:10px;text-align:center;}
.article-body table{
  width:100%;border-collapse:collapse;margin-top:24px;font-size:14.5px;
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body th{background:var(--ink-800);color:var(--text);font-weight:600;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
.article-body code{
  font-family:var(--font-num);font-size:14px;background:var(--ink-800);
  border:1px solid var(--line);border-radius:4px;padding:1px 6px;
}

/* 入口提示卡 */
.entry-card{
  margin-top:44px;border:1px solid rgba(23,224,168,.4);border-radius:var(--r-panel);
  background:linear-gradient(140deg,rgba(23,224,168,.08),rgba(23,224,168,0) 65%),var(--ink-900);
  padding:26px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.entry-card .entry-text{font-size:15px;color:#DCE4E2;max-width:46ch;}
.entry-card .entry-label{
  display:block;font-size:12px;letter-spacing:.16em;color:var(--brand);margin-bottom:8px;
}

/* 标签与返回 */
.article-foot{margin-top:44px;padding-top:26px;border-top:1px solid var(--line);}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;}
.back-links{display:flex;flex-wrap:wrap;gap:26px;margin-top:22px;font-size:14px;}
.back-links a{color:var(--muted);display:inline-flex;align-items:center;gap:6px;transition:color .2s var(--ease),gap .2s var(--ease);}
.back-links a:hover{color:var(--brand);gap:10px;}

/* 侧栏 */
.article-side{align-self:start;position:sticky;top:88px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  border:1px solid var(--line);border-radius:var(--r-panel);background:var(--ink-900);
  padding:22px;box-shadow:var(--shadow-deep);
}
.side-card h3{font-size:14px;font-weight:700;letter-spacing:.08em;color:var(--muted);margin-bottom:14px;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list a{
  display:block;font-size:13.5px;color:var(--muted);padding:7px 10px;border-radius:8px;
  border-left:2px solid transparent;transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.toc-list a:hover{color:var(--text);background:var(--ink-800);}
.toc-list a.is-current{color:var(--brand);border-left-color:var(--brand);background:rgba(23,224,168,.07);}
.side-cta{background:linear-gradient(160deg,rgba(23,224,168,.12),rgba(23,224,168,0) 70%),var(--ink-900);}
.side-cta p{font-size:13.5px;color:var(--muted);margin-bottom:16px;}
.side-cta .btn{width:100%;}

/* 移动端折叠目录 */
.toc-mobile{display:none;margin-bottom:28px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--ink-900);}
.toc-mobile summary{
  list-style:none;cursor:pointer;padding:14px 18px;font-size:14px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;
}
.toc-mobile summary::-webkit-details-marker{display:none;}
.toc-mobile summary::after{content:"+";color:var(--brand);font-size:18px;line-height:1;}
.toc-mobile[open] summary::after{content:"−";}
.toc-mobile .toc-list{padding:0 12px 14px;}

/* ============ 相关推荐 ============ */
.related-section{border-top:1px solid var(--line);background:var(--ink-900);}
.related-inner{padding:var(--gap-section) 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px;}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:800;letter-spacing:-.01em;}
.section-head .more-link{
  font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px;
  transition:gap .2s var(--ease);
}
.section-head .more-link:hover{gap:10px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.post-card{
  display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r-panel);
  background:var(--ink-800);overflow:hidden;transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(23,224,168,.28);box-shadow:var(--shadow-deep);}
.post-thumb{position:relative;background:var(--ink-700);}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-body h3{
  font-size:16.5px;font-weight:700;line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-body p{
  font-size:13.5px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:4px;font-size:12.5px;color:var(--muted);}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-panel);padding:44px 24px;text-align:center;
}
.empty-state .empty-icon{
  width:44px;height:44px;margin:0 auto 14px;border-radius:12px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:20px;
}
.empty-state p{font-size:14px;color:var(--muted);margin-bottom:18px;}

/* ============ 尾部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px) 0 0/100% 44px,
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px) 0 0/44px 100%,
    var(--ink-950);
}
.cta-inner{padding:clamp(64px,8vw,104px) 0;text-align:center;display:flex;flex-direction:column;align-items:center;gap:22px;}
.cta-inner h2{font-size:clamp(26px,3.4vw,40px);font-weight:900;letter-spacing:-.02em;line-height:1.2;max-width:22ch;}
.cta-inner p{font-size:15px;color:var(--muted);max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-950);border-top:1px solid var(--line);}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;
  padding:64px 0 44px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-text{font-size:13.5px;color:var(--muted);line-height:1.8;max-width:34ch;}
.footer-col h4{font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--text);margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:13.5px;color:var(--muted);line-height:1.7;}
.footer-col a{color:var(--muted);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--brand);}
.footer-contact .num{color:#CBD4D2;font-family:var(--font-num);}
.footer-bar{
  display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center;justify-content:space-between;
  padding:20px 0 26px;border-top:1px solid var(--line);font-size:12.5px;color:#7B868A;
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:32px;bottom:32px;z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#04140F;font-weight:700;font-size:14px;
  padding:13px 24px;border-radius:var(--r-pill);
  box-shadow:0 14px 34px -16px rgba(23,224,168,.9);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),background .2s var(--ease);
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--brand-deep);}
.mobile-bar{display:none;}

/* ============ 响应式 ============ */
@media (max-width:1536px){
  .container{max-width:1200px;}
}
@media (max-width:1279px){
  .article-wrap{grid-template-columns:minmax(0,1fr) 280px;gap:40px;}
  .search-box input{width:180px;}
}
@media (max-width:1023px){
  .nav-menu{display:none;}
  .search-box{display:none;}
  .menu-toggle{display:flex;}
  .article-wrap{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-side{display:none;}
  .toc-mobile{display:block;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  body{font-size:15.5px;}
  .header-inner{height:56px;gap:12px;}
  .brand-text{font-size:16px;}
  .btn-primary{padding:9px 18px;font-size:13.5px;}
  .article-head h1{font-size:clamp(26px,7vw,34px);max-width:none;}
  .article-body h2{font-size:21px;}
  .article-body h3{font-size:18px;}
  .entry-card{padding:20px;}
  .card-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding:48px 0 32px;}
  .footer-bar{flex-direction:column;align-items:flex-start;padding-bottom:96px;}
  .float-cta{display:none;}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;height:56px;z-index:95;
    background:rgba(16,21,26,.96);border-top:1px solid var(--line);
    align-items:center;justify-content:space-between;gap:12px;padding:0 16px;
  }
  .mobile-bar .btn-primary{flex:1 1 auto;height:40px;}
  .mobile-bar .bar-text{font-size:13.5px;color:var(--muted);white-space:nowrap;transition:color .2s var(--ease);}
  .mobile-bar .bar-text:hover{color:var(--brand);}
  .related-inner{padding:56px 0;}
}
@media (max-width:520px){
  .article-meta{gap:6px 14px;}
  .crumb .current{max-width:32ch;}
  .cta-actions{flex-direction:column;width:100%;}
  .cta-actions .btn{width:100%;}
  .search-box input{width:100%;}
}
@media (max-width:374px){
  .container{padding:0 16px;}
  .brand-text{font-size:15px;}
  .btn-primary{padding:8px 14px;font-size:13px;}
  .article-head h1{font-size:24px;}
}

/* 进入视口动画 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink-950:#0A0D10;
  --ink-900:#10151A;
  --ink-800:#171E25;
  --ink-700:#212A33;
  --brand:#17E0A8;
  --brand-deep:#0FB98C;
  --accent:#FFB23F;
  --text:#F1F5F4;
  --muted:#9BA6AA;
  --line:rgba(255,255,255,.08);
  --paper:#F4F5F2;
  --paper-ink:#12171C;
  --paper-muted:#5B676D;
  --paper-line:rgba(18,23,28,.12);
  --r-tag:4px;
  --r-card:10px;
  --r-panel:16px;
  --r-pill:999px;
  --shadow-dark:0 18px 44px -22px rgba(0,0,0,.85);
  --shadow-light:0 2px 10px rgba(16,24,32,.06);
  --ring:0 0 0 1px rgba(255,255,255,.07);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:64px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"Noto Sans SC","HarmonyOS Sans",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
a:hover{color:var(--brand)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.num{font-family:Inter,"Noto Sans SC",system-ui,sans-serif;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:clamp(72px,9vw,128px) 0}
.section--tight{padding:clamp(48px,6vw,80px) 0}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#04140F;padding:10px 16px;border-radius:0 0 var(--r-card) 0;z-index:200}
.skip-link:focus{left:0}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(10,13,16,.86);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-solid{background:rgba(10,13,16,.94);border-bottom-color:var(--line)}
.header-inner{
  height:var(--header-h);display:flex;align-items:center;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-mark svg{width:18px;height:18px}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-link{
  position:relative;padding:8px 12px;font-size:14.5px;color:var(--muted);
  border-radius:6px;transition:color .2s var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:1px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{height:2px;transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;width:220px;height:40px;
  padding:0 12px;border-radius:var(--r-card);
  background:var(--ink-800);box-shadow:var(--ring);
  transition:box-shadow .2s var(--ease);
}
.search-box:focus-within{box-shadow:0 0 0 1px var(--brand)}
.search-box svg{width:16px;height:16px;flex:0 0 auto;color:var(--muted)}
.search-box input{
  width:100%;height:100%;border:0;background:transparent;color:var(--text);outline:none;font-size:14px;
}
.search-box input::placeholder{color:var(--muted)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;white-space:nowrap;
  transition:transform .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--brand);color:#04140F}
.btn-primary:hover{background:var(--brand-deep);color:#04140F;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{border:1px solid var(--line);color:var(--text);background:transparent}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-text{
  padding:8px 2px;min-height:0;color:var(--muted);font-weight:500;
}
.btn-text:hover{color:var(--brand)}
.btn-text span{display:inline-block;transition:transform .2s var(--ease)}
.btn-text:hover span{transform:translateX(6px)}
.btn-block{width:100%}
.header-cta{min-height:40px;padding:0 18px}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  align-items:center;justify-content:center;box-shadow:var(--ring);
}
.menu-toggle svg{width:20px;height:20px}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,7,9,.6);z-index:180;
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:320px;max-width:86vw;z-index:190;
  background:var(--ink-900);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:20px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:44px;height:44px;border-radius:10px;display:grid;place-items:center;box-shadow:var(--ring)}
.drawer-close svg{width:18px;height:18px}
.drawer-search{margin-bottom:16px}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{
  padding:13px 12px;border-radius:var(--r-card);font-size:15px;color:var(--muted);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.drawer-nav a:hover{background:var(--ink-800);color:var(--text)}
.drawer-nav a.is-active{color:var(--brand);background:rgba(23,224,168,.08);font-weight:600}
.drawer-foot{margin-top:auto;padding-top:20px;display:flex;flex-direction:column;gap:10px}

/* ============ 分类页横幅 ============ */
.page-banner{
  position:relative;height:240px;display:flex;align-items:flex-end;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,13,16,.82) 0%,rgba(10,13,16,.72) 45%,rgba(10,13,16,.94) 100%);
}
.page-banner .container{position:relative;z-index:1;padding-bottom:26px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:12px}
.crumb a:hover{color:var(--brand)}
.crumb .sep{opacity:.5}
.crumb .current{color:var(--muted)}
.page-banner h1{
  font-size:clamp(28px,3.6vw,44px);font-weight:900;line-height:1.1;letter-spacing:-.02em;
  max-width:900px;
}
.page-banner p{margin-top:10px;max-width:720px;color:var(--muted);font-size:15px}
.banner-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border:1px solid rgba(23,224,168,.45);border-radius:var(--r-tag);
  font-size:12px;color:var(--brand);letter-spacing:.02em;
}
.tag--accent{border-color:rgba(255,178,63,.5);color:var(--accent)}

/* ============ 目录 + 卡片 ============ */
.catalog-grid{display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:start}
.catalog-aside{position:sticky;top:96px}
.aside-title{
  display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.14em;
  color:var(--muted);text-transform:uppercase;margin-bottom:16px;
}
.aside-title::before{content:"";width:22px;height:1px;background:var(--brand)}
.dir-list{border-top:1px solid var(--line)}
.dir-list a{
  display:flex;align-items:baseline;gap:12px;padding:14px 4px;
  border-bottom:1px solid var(--line);color:var(--muted);font-size:14.5px;
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.dir-list a .idx{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:12px;color:var(--brand);min-width:22px;
}
.dir-list a:hover,.dir-list a.is-current{color:var(--text);padding-left:10px}
.dir-list a:hover .idx,.dir-list a.is-current .idx{color:var(--brand)}
.aside-card{
  margin-top:24px;padding:20px;border-radius:var(--r-panel);
  background:var(--ink-800);box-shadow:var(--ring);
}
.aside-card h4{font-size:15px;font-weight:700;margin-bottom:8px}
.aside-card p{font-size:13px;color:var(--muted);line-height:1.75;margin-bottom:14px}

.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.topic-card{
  display:flex;flex-direction:column;
  border-radius:var(--r-panel);overflow:hidden;background:var(--ink-900);
  box-shadow:var(--ring),var(--shadow-dark);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
  scroll-margin-top:96px;
}
.topic-card:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(23,224,168,.25),var(--shadow-dark)}
.thumb{
  position:relative;width:100%;aspect-ratio:16/9;background:var(--ink-700);overflow:hidden;
}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.topic-card:hover .thumb img{transform:scale(1.04)}
.thumb .badge{
  position:absolute;left:12px;top:12px;
  background:rgba(10,13,16,.78);border:1px solid rgba(23,224,168,.4);
  color:var(--brand);font-size:12px;padding:3px 9px;border-radius:var(--r-tag);
}
.topic-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.topic-body h3{font-size:18px;font-weight:700}
.topic-body p{font-size:14px;color:var(--muted);line-height:1.8}
.topic-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:10px;font-size:13px;color:var(--muted);
}
.topic-meta .link{color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.topic-meta .link span{transition:transform .2s var(--ease)}
.topic-card:hover .topic-meta .link span{transform:translateX(6px)}

/* ============ 步骤流程 ============ */
.section-head{margin-bottom:36px;max-width:760px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:var(--accent);
  letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--accent)}
.section-head h2{font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.2}
.section-head p{margin-top:12px;color:var(--muted);font-size:15px;max-width:680px}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  position:relative;padding:24px 20px;border-radius:var(--r-panel);
  background:var(--ink-900);box-shadow:var(--ring);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.step:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(23,224,168,.25),var(--shadow-dark)}
.step .step-no{
  font-family:Inter,system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:30px;font-weight:800;color:rgba(23,224,168,.35);line-height:1;margin-bottom:14px;
}
.step h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted);line-height:1.8}

/* ============ 注意事项（不对称分栏） ============ */
.note-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.note-list{display:flex;flex-direction:column;gap:18px;margin-top:26px}
.note-item{
  display:flex;gap:14px;padding:16px 18px;border-radius:var(--r-card);
  background:var(--ink-900);box-shadow:var(--ring);
}
.note-item .dot{
  flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--brand);margin-top:11px;
}
.note-item h3{font-size:15.5px;font-weight:700;margin-bottom:4px}
.note-item p{font-size:13.5px;color:var(--muted);line-height:1.8}
.note-figure{position:relative;border-radius:var(--r-panel);overflow:hidden;box-shadow:var(--shadow-dark)}
.note-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.note-figure .float-tag{
  position:absolute;left:16px;bottom:16px;
  background:rgba(10,13,16,.85);border:1px solid rgba(23,224,168,.35);
  color:var(--brand);font-size:12.5px;padding:6px 12px;border-radius:var(--r-tag);
}

/* ============ FAQ 反白区 ============ */
.paper{background:var(--paper);color:var(--paper-ink)}
.paper .section-head h2{color:var(--paper-ink)}
.paper .eyebrow{color:#9A6A10}
.paper .eyebrow::before{background:#C98A12}
.faq-list{max-width:900px;border-top:1px solid var(--paper-line)}
.faq-item{border-bottom:1px solid var(--paper-line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;text-align:left;font-size:16.5px;font-weight:700;color:var(--paper-ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:#0A7259}
.faq-q .plus{
  flex:0 0 auto;width:26px;height:26px;display:grid;place-items:center;
  color:#0A7259;font-size:20px;line-height:1;transition:transform .25s var(--ease);
}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a-inner{
  position:relative;padding:0 0 20px 16px;font-size:14.5px;line-height:1.9;color:var(--paper-muted);
  border-left:3px solid var(--accent);margin-left:2px;
}
.faq-item.is-open .faq-a{max-height:320px}

/* ============ 上下一条分类 ============ */
.pager{
  display:grid;grid-template-columns:1fr 1fr;gap:20px;
  margin-top:8px;
}
.pager a{
  display:flex;flex-direction:column;gap:6px;padding:20px;
  border-radius:var(--r-panel);background:var(--ink-900);box-shadow:var(--ring);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),color .2s var(--ease);
}
.pager a:hover{transform:translateY(-2px);box-shadow:0 0 0 1px rgba(23,224,168,.25),var(--shadow-dark);color:var(--brand)}
.pager .dir{font-size:12.5px;color:var(--muted);letter-spacing:.12em}
.pager .name{font-size:16.5px;font-weight:700}
.pager .next{align-items:flex-end;text-align:right}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;padding:clamp(56px,7vw,96px) 0;
  background:var(--ink-900);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-inner{position:relative;z-index:1;text-align:center;max-width:760px;margin:0 auto}
.cta-inner h2{font-size:clamp(24px,3vw,34px);font-weight:800}
.cta-inner p{margin-top:12px;color:var(--muted);font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-950);border-top:1px solid var(--line);padding:clamp(48px,6vw,72px) 0 24px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-text{font-size:13.5px;color:var(--muted);line-height:1.9;max-width:320px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:14px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13.5px;color:var(--muted);transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-contact li{font-size:13.5px;color:var(--muted);line-height:1.8}
.footer-bar{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:var(--muted);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:110;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease);
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:115;height:56px;
  display:none;align-items:center;gap:10px;padding:0 16px;
  background:rgba(10,13,16,.96);border-top:1px solid var(--line);
}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .catalog-grid{grid-template-columns:240px 1fr;gap:36px}
}
@media (max-width:1024px){
  .header-inner{gap:16px}
  .nav-menu{display:none}
  .search-box{width:180px}
  .menu-toggle{display:inline-flex}
  .catalog-grid{grid-template-columns:1fr;gap:32px}
  .catalog-aside{position:static}
  .dir-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .note-grid{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  :root{--header-h:56px}
  body{font-size:15.5px}
  .search-box{display:none}
  .header-cta{display:none}
  .card-grid{grid-template-columns:1fr}
  .page-banner{height:240px}
  .pager{grid-template-columns:1fr}
  .pager .next{align-items:flex-start;text-align:left}
  .cta-actions .btn{width:100%}
}
@media (max-width:520px){
  .dir-list{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bar{flex-direction:column;gap:6px}
  .float-cta{display:none}
  .mobile-bar{display:flex}
  body{padding-bottom:72px}
  .page-banner h1{font-size:26px}
  .topic-body,.step{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
html{scroll-behavior:smooth}
[id]{scroll-margin-top:96px}

/* roulang page: category3 */
:root{
  --ink-950:#0A0D10;
  --ink-900:#10151A;
  --ink-800:#171E25;
  --ink-700:#212A33;
  --brand:#17E0A8;
  --brand-deep:#0FB98C;
  --accent:#FFB23F;
  --text:#F1F5F4;
  --muted:#9BA6AA;
  --line:rgba(255,255,255,.08);
  --paper:#F4F5F2;
  --paper-ink:#12171C;
  --paper-muted:#5C6862;
  --paper-line:rgba(18,23,28,.12);
  --r-tag:4px;
  --r-card:10px;
  --r-panel:16px;
  --r-pill:999px;
  --shadow-dark:0 18px 44px -22px rgba(0,0,0,.85);
  --shadow-paper:0 2px 10px rgba(16,24,32,.06);
  --ease:cubic-bezier(.22,.61,.36,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"Noto Sans SC","HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}

/* ---------- 顶部进度条 ---------- */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--brand);z-index:120;transition:width .12s linear;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(10,13,16,.86);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{background:rgba(10,13,16,.94);border-bottom-color:var(--line);}
.header-inner{display:flex;align-items:center;gap:24px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--brand);display:grid;place-items:center;}
.brand-mark svg{width:18px;height:18px;}
.brand-text{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;padding:8px 12px;font-size:14.5px;color:var(--muted);
  border-radius:8px;transition:color .2s var(--ease);
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--brand);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{position:relative;}
.search-box input{
  width:220px;height:40px;border-radius:var(--r-card);
  background:var(--ink-700);border:1px solid var(--line);
  color:var(--text);padding:0 38px 0 14px;font-size:14px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.search-box input::placeholder{color:#7D888C;}
.search-box input:focus{outline:none;border-color:var(--brand);background:var(--ink-800);}
.search-box svg{position:absolute;right:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;stroke:var(--muted);}
.link-btn{font-size:14.5px;color:var(--muted);padding:10px 8px;transition:color .2s var(--ease);}
.link-btn:hover{color:var(--brand);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn-primary{background:var(--brand);color:#04140F;box-shadow:0 10px 28px -14px rgba(23,224,168,.8);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border:1px solid var(--line);color:var(--text);background:transparent;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.header-right .btn-primary{height:40px;padding:0 20px;font-size:14.5px;}
.menu-toggle{display:none;width:44px;height:44px;border-radius:var(--r-card);border:1px solid var(--line);place-items:center;}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,7,9,.6);z-index:110;
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:320px;max-width:86vw;z-index:111;
  background:var(--ink-900);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s var(--ease);
  display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line);}
.drawer-head .brand-text{font-size:15px;}
.drawer-close{width:44px;height:44px;border-radius:var(--r-card);border:1px solid var(--line);display:grid;place-items:center;font-size:18px;color:var(--muted);}
.drawer-close:hover{color:var(--brand);border-color:var(--brand);}
.drawer-body{padding:16px 18px;overflow-y:auto;flex:1;}
.drawer-body .search-box{margin-bottom:16px;}
.drawer-body .search-box input{width:100%;}
.drawer-nav a{
  display:block;padding:13px 12px;border-radius:var(--r-card);
  font-size:15px;color:var(--muted);border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.drawer-nav a:hover{background:var(--ink-800);color:var(--text);}
.drawer-nav a.is-active{color:var(--brand);border-color:rgba(23,224,168,.35);background:rgba(23,224,168,.07);}
.drawer-foot{padding:16px 18px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ---------- 通用板块 ---------- */
.section{padding:clamp(72px,9vw,128px) 0;}
.section-head{max-width:740px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.14em;
  color:var(--brand);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:block;}
h1{font-size:clamp(30px,4.4vw,52px);font-weight:900;line-height:1.12;letter-spacing:-.02em;}
h2{font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.22;letter-spacing:-.015em;}
h3{font-size:20px;font-weight:700;line-height:1.4;}
.lead{color:var(--muted);font-size:16px;margin-top:16px;max-width:640px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;
  border:1px solid rgba(23,224,168,.4);border-radius:var(--r-tag);
  color:var(--brand);font-size:12px;letter-spacing:.05em;
}
.tag-accent{border-color:rgba(255,178,63,.45);color:var(--accent);}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px;color:var(--muted);padding:20px 0 0;}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{opacity:.45;}
.crumbs .current{color:#7D888C;}

/* ---------- 内页横幅 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:#0C1014;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  opacity:.42;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,13,16,.78),rgba(10,13,16,.92));
}
.page-hero .container{position:relative;z-index:2;}
.hero-inner{padding:56px 0 64px;max-width:800px;}
.hero-inner h1{margin-top:18px;}
.hero-inner .lead{font-size:16.5px;max-width:660px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:24px;margin-top:28px;}
.hero-meta div{min-width:120px;}
.hero-meta .k{font-size:26px;font-weight:800;color:var(--brand);letter-spacing:-.02em;}
.hero-meta .v{font-size:12.5px;color:var(--muted);letter-spacing:.06em;}

/* ---------- Z 字图文长条 ---------- */
.zlist{display:flex;flex-direction:column;gap:clamp(56px,7vw,96px);}
.zrow{display:grid;grid-template-columns:7fr 5fr;gap:clamp(28px,4vw,64px);align-items:center;}
.zrow.reverse{grid-template-columns:5fr 7fr;}
.zrow.reverse .zmedia{order:2;}
.zrow.reverse .ztext{order:1;}
.zmedia{
  position:relative;border-radius:var(--r-panel);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-dark);
  background:var(--ink-800);aspect-ratio:16/10;
}
.zmedia img{width:100%;height:100%;object-fit:cover;}
.zmedia .float-label{
  position:absolute;left:16px;bottom:16px;
  background:rgba(10,13,16,.82);border:1px solid var(--line);
  border-radius:var(--r-pill);padding:7px 14px;font-size:12.5px;color:var(--text);
  letter-spacing:.04em;
}
.zindex{
  font-size:13px;font-weight:800;letter-spacing:.16em;color:var(--accent);
  display:flex;align-items:center;gap:10px;margin-bottom:14px;
}
.zindex::after{content:"";flex:1;height:1px;background:var(--line);}
.ztext h2{font-size:clamp(22px,2.4vw,30px);}
.ztext p{color:var(--muted);margin-top:14px;}
.zpoints{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
.zpoints li{
  position:relative;padding-left:20px;font-size:14.8px;color:var(--text);
}
.zpoints li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;
  border-radius:2px;background:var(--brand);opacity:.85;
}

/* ---------- 反白对照区 ---------- */
.paper-band{background:var(--paper);color:var(--paper-ink);}
.paper-band .eyebrow{color:#0B9C77;}
.paper-band .eyebrow::before{background:#0B9C77;}
.paper-band .lead{color:var(--paper-muted);}
.compare{
  display:grid;grid-template-columns:1.1fr 1.3fr 1.4fr;
  border-top:1px solid var(--paper-line);
}
.compare > div{
  padding:20px 22px;border-bottom:1px solid var(--paper-line);
  border-right:1px solid var(--paper-line);font-size:14.8px;
}
.compare > div:nth-child(3n){border-right:0;}
.compare .ch{
  font-size:13px;font-weight:800;letter-spacing:.1em;color:#0B9C77;
  background:rgba(23,224,168,.08);
}
.compare .cc-strong{font-weight:700;}
.compare .cc-muted{color:var(--paper-muted);}
.compare-note{margin-top:22px;font-size:13.5px;color:var(--paper-muted);}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--ink-900);overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item:hover{border-color:rgba(23,224,168,.28);}
.faq-item.is-open{border-color:rgba(23,224,168,.45);background:var(--ink-800);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:18px 20px;font-size:16.5px;font-weight:700;line-height:1.5;
}
.faq-q .plus{
  margin-left:auto;flex:0 0 auto;width:26px;height:26px;position:relative;
  border-radius:50%;border:1px solid var(--line);transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.faq-q .plus::before,.faq-q .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);
  transform:translate(-50%,-50%);
}
.faq-q .plus::before{width:11px;height:1.5px;}
.faq-q .plus::after{width:1.5px;height:11px;}
.faq-item.is-open .faq-q .plus{transform:rotate(45deg);border-color:rgba(23,224,168,.5);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s var(--ease);
  border-left:3px solid var(--brand);margin:0 20px 0 20px;
}
.faq-a-inner{padding:2px 0 20px 16px;color:var(--muted);font-size:15px;}
.faq-a-inner p + p{margin-top:12px;}

/* ---------- 分类互链 ---------- */
.catnav{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:28px 0;
}
.catnav a{
  display:flex;align-items:center;gap:14px;padding:16px 18px;
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--ink-900);
  transition:border-color .2s var(--ease),transform .2s var(--ease),background .2s var(--ease);
}
.catnav a:hover{border-color:rgba(23,224,168,.4);transform:translateY(-2px);background:var(--ink-800);}
.catnav .dir{font-size:12px;color:var(--muted);letter-spacing:.08em;}
.catnav .tt{font-size:15.5px;font-weight:700;}
.catnav .arrow{margin-left:auto;color:var(--brand);font-size:16px;}
.catnav a.next{justify-content:flex-end;text-align:right;flex-direction:row-reverse;}
.catnav a.next .arrow{margin-left:0;margin-right:auto;}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-900);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-inner{position:relative;z-index:2;text-align:center;padding:clamp(64px,8vw,104px) 0;max-width:720px;margin:0 auto;}
.cta-inner h2{margin-bottom:14px;}
.cta-inner p{color:var(--muted);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-950);padding:64px 0 0;border-top:1px solid var(--line);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand .brand-mark{background:var(--brand);}
.footer-text{color:var(--muted);font-size:14.5px;max-width:340px;}
.footer-col h4{font-size:14px;font-weight:800;letter-spacing:.06em;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:var(--muted);font-size:14.5px;transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{color:var(--muted);font-size:14px;}
.footer-contact .num{color:var(--text);}
.footer-bar{
  margin-top:52px;padding:20px 0;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:#7D888C;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:90;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease);
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:95;
  background:rgba(10,13,16,.94);border-top:1px solid var(--line);
  padding:8px 16px;gap:12px;align-items:center;
}
.mobile-bar .btn{flex:1;height:42px;font-size:14.5px;}
.mobile-bar .link-btn{flex:0 0 auto;}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  .btn,.faq-item,.catnav a{transition:none;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .search-box input{width:180px;}
}
@media (max-width:1024px){
  .nav-menu,.search-box,.header-right .link-btn{display:none;}
  .menu-toggle{display:grid;}
  .header-right .btn-primary{height:38px;padding:0 16px;font-size:14px;}
  .zrow,.zrow.reverse{grid-template-columns:1fr;gap:24px;}
  .zrow.reverse .zmedia{order:1;}
  .zrow.reverse .ztext{order:2;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .compare{grid-template-columns:1fr 1fr;}
  .compare > div:nth-child(3n){border-right:1px solid var(--paper-line);}
  .compare > div:nth-child(2n){border-right:0;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .header-inner{height:56px;gap:12px;}
  .mobile-bar{display:flex;}
  .float-cta{display:none;}
  body{padding-bottom:60px;}
  .hero-inner{padding:36px 0 44px;}
  .hero-meta{gap:18px 26px;}
  .cta-actions .btn{width:100%;}
  .catnav{grid-template-columns:1fr;}
  .catnav a.next{flex-direction:row;text-align:left;justify-content:flex-start;}
  .catnav a.next .arrow{margin-left:auto;margin-right:0;}
  .compare{grid-template-columns:1fr;border-top:1px solid var(--paper-line);}
  .compare > div{border-right:0 !important;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bar{flex-direction:column;}
}
@media (max-width:520px){
  body{font-size:15.5px;}
  h3{font-size:18px;}
  .faq-q{font-size:15.5px;padding:16px;}
  .faq-a{margin:0 16px;}
  .section-head{margin-bottom:28px;}
  .zmedia{aspect-ratio:4/3;}
  .hero-meta .k{font-size:22px;}
}
@media (max-width:375px){
  .container{padding:0 16px;}
  .brand-text{font-size:14.5px;}
  .btn{padding:0 18px;font-size:14.5px;}
  .eyebrow{font-size:11.5px;letter-spacing:.1em;}
}

/* roulang page: category2 */
:root{
  --ink-950:#0A0D10;
  --ink-900:#10151A;
  --ink-800:#171E25;
  --ink-700:#212A33;
  --brand:#17E0A8;
  --brand-deep:#0FB98C;
  --accent:#FFB23F;
  --text:#F1F5F4;
  --muted:#9BA6AA;
  --line:rgba(255,255,255,.08);
  --paper:#F4F5F2;
  --paper-ink:#12171C;
  --paper-muted:#5A6470;
  --paper-line:rgba(18,23,28,.12);
  --radius-tag:4px;
  --radius-card:10px;
  --radius-panel:16px;
  --radius-pill:999px;
  --shadow-dark:0 18px 44px -22px rgba(0,0,0,.85);
  --shadow-light:0 2px 10px rgba(16,24,32,.06);
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"Noto Sans SC","HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease);}
a:hover{color:var(--brand);}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0;}
ul,ol{list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
::selection{background:var(--brand);color:#04140F;}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.section{padding:clamp(72px,9vw,128px) 0;position:relative;}
.section--tight{padding:clamp(52px,6vw,84px) 0;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(10,13,16,.86);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(10,13,16,.94);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;align-items:center;gap:20px;
  height:64px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:24px;height:24px;flex:none;border-radius:6px;
  background:var(--brand);display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 0 0 1px rgba(23,224,168,.35);
}
.brand-mark svg{width:15px;height:15px;display:block;}
.brand-text{font-size:17px;font-weight:800;letter-spacing:.01em;white-space:nowrap;}
.brand:hover .brand-text{color:var(--brand);}

.nav-menu{display:flex;align-items:center;gap:4px;margin-left:12px;flex:1 1 auto;min-width:0;}
.nav-link{
  position:relative;padding:8px 12px;font-size:14.5px;color:var(--muted);
  border-radius:8px;white-space:nowrap;transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:transparent;border-radius:2px;transition:background .2s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{background:rgba(23,224,168,.5);}
.nav-link.is-active{color:var(--brand);font-weight:600;}
.nav-link.is-active::after{background:var(--brand);}

.header-actions{display:flex;align-items:center;gap:10px;flex:none;}
.search-box{
  position:relative;display:flex;align-items:center;
  width:220px;height:40px;border-radius:var(--radius-card);
  background:var(--ink-700);border:1px solid var(--line);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.search-box:focus-within{border-color:var(--brand);background:var(--ink-800);}
.search-box svg{width:16px;height:16px;margin-left:12px;flex:none;opacity:.6;}
.search-box input{
  flex:1;min-width:0;height:100%;background:none;border:0;padding:0 12px 0 8px;
  font-size:14px;color:var(--text);
}
.search-box input::placeholder{color:var(--muted);}
.search-box input:focus{outline:none;}
.search-hint{
  position:absolute;top:46px;right:0;z-index:20;
  min-width:220px;padding:10px 12px;border-radius:var(--radius-card);
  background:var(--ink-800);border:1px solid var(--line);
  font-size:12.5px;line-height:1.6;color:var(--muted);
  box-shadow:var(--shadow-dark);display:none;
}
.search-hint.is-open{display:block;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-pill);
  font-size:14.5px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),opacity .18s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#04140F;}
.btn--primary:hover{background:var(--brand-deep);color:#04140F;transform:translateY(-1px);}
.btn--primary:active{transform:translateY(0);}
.btn--ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.18);}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn--ghost:active{transform:translateY(0);}
.btn--text{
  min-height:40px;padding:0 4px;border-radius:0;color:var(--muted);
  background:none;border:0;
}
.btn--text:hover{color:var(--brand);}
.btn--text .arrow{display:inline-block;transition:transform .2s var(--ease);}
.btn--text:hover .arrow{transform:translateX(6px);}
.btn--dark{background:var(--paper-ink);color:var(--paper);}
.btn--dark:hover{background:#20272E;color:var(--paper);transform:translateY(-1px);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;}
.btn--sm{min-height:38px;padding:0 16px;font-size:13.5px;}

.icon-btn{
  width:40px;height:40px;border-radius:var(--radius-card);
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--ink-700);color:var(--text);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);}
.icon-btn svg{width:18px;height:18px;}

.mobile-toggle{display:none;width:44px;height:44px;border-radius:var(--radius-card);border:1px solid var(--line);align-items:center;justify-content:center;}
.mobile-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.mobile-toggle span::before,
.mobile-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);}
.mobile-toggle span::before{top:-6px;}
.mobile-toggle span::after{top:6px;}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,7,9,.7);z-index:200;
  opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:320px;max-width:86vw;z-index:210;
  background:var(--ink-900);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .3s var(--ease);
  display:flex;flex-direction:column;padding:16px 20px 20px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-title{font-size:14px;color:var(--muted);}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 12px;border-radius:var(--radius-card);
  font-size:15px;color:var(--text);
}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--ink-800);color:var(--brand);}
.drawer-search{margin:18px 0;width:100%;}
.drawer-search.search-box{width:100%;}
.drawer-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ============ Hero（居中标语区） ============ */
.hero-cat{
  position:relative;overflow:hidden;
  padding:clamp(72px,9vw,118px) 0 clamp(56px,7vw,88px);
  text-align:center;
  border-bottom:1px solid var(--line);
}
.hero-cat__bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.hero-cat__bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,13,16,.78) 0%,rgba(10,13,16,.86) 55%,var(--ink-950) 100%);
}
.hero-cat__grid{
  position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
}
.hero-cat__inner{position:relative;z-index:2;max-width:860px;margin:0 auto;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--radius-tag);
  border:1px solid rgba(23,224,168,.35);background:rgba(23,224,168,.08);
  color:var(--brand);font-size:12.5px;letter-spacing:.08em;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);}
.hero-cat h1{
  margin:22px 0 18px;
  font-size:clamp(30px,4.4vw,52px);
  font-weight:900;line-height:1.16;letter-spacing:-.02em;
}
.hero-cat h1 em{font-style:normal;color:var(--brand);}
.hero-sub{
  max-width:660px;margin:0 auto;
  font-size:clamp(15.5px,1.3vw,17.5px);color:var(--muted);line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:30px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;margin:42px auto 0;max-width:760px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius-panel);
  overflow:hidden;
}
.hero-stats .stat{background:rgba(16,21,26,.72);padding:18px 16px;text-align:center;}
.stat-num{font-size:clamp(20px,2vw,26px);font-weight:800;color:var(--brand);letter-spacing:-.01em;line-height:1.2;}
.stat-label{font-size:12.5px;color:var(--muted);margin-top:4px;letter-spacing:.04em;}

/* ============ 通用标题 ============ */
.section-head{margin-bottom:clamp(30px,4vw,48px);}
.section-head--split{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.section-label{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.16em;
  color:var(--brand);text-transform:uppercase;
}
.section-label::before{content:"";width:18px;height:1px;background:var(--brand);}
.section-head h2{
  margin-top:12px;font-size:clamp(26px,3vw,36px);font-weight:800;line-height:1.3;letter-spacing:-.015em;
}
.section-head p{max-width:680px;margin-top:12px;color:var(--muted);font-size:15.5px;}

/* ============ 信息密集型列表行 ============ */
.row-list{border-top:1px solid var(--line);}
.row-item{
  display:grid;grid-template-columns:56px minmax(0,1fr) 40px;
  align-items:center;gap:20px;
  min-height:72px;padding:16px 18px;
  border-bottom:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:background .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.row-item:hover{background:var(--ink-800);border-color:rgba(23,224,168,.25);color:var(--text);}
.row-icon{
  width:44px;height:44px;border-radius:var(--radius-card);
  display:flex;align-items:center;justify-content:center;
  background:rgba(23,224,168,.1);border:1px solid rgba(23,224,168,.28);color:var(--brand);
  flex:none;
}
.row-icon svg{width:20px;height:20px;}
.row-body{min-width:0;}
.row-body h3{
  font-size:17px;font-weight:700;line-height:1.4;letter-spacing:0;
  display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
}
.row-body h3 .idx{
  font-size:12px;color:var(--accent);letter-spacing:.1em;font-weight:700;
}
.row-body p{margin-top:4px;color:var(--muted);font-size:14px;line-height:1.7;}
.row-arrow{
  width:40px;height:40px;border-radius:var(--radius-card);
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);border:1px solid transparent;
  transition:color .2s var(--ease),transform .2s var(--ease),border-color .2s var(--ease);
}
.row-item:hover .row-arrow{color:var(--brand);transform:translateX(4px);border-color:rgba(23,224,168,.3);}
.row-arrow svg{width:16px;height:16px;}
.row-cta{
  margin-top:26px;display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  padding:20px 22px;border:1px dashed rgba(23,224,168,.4);border-radius:var(--radius-panel);
  background:rgba(23,224,168,.05);
}
.row-cta p{font-size:14.5px;color:var(--muted);flex:1 1 260px;}

/* ============ 步骤流程 ============ */
.steps-wrap{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;}
.steps{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;
}
.step-card{
  position:relative;padding:24px 20px;
  background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-panel);
  transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.step-card:hover{border-color:rgba(23,224,168,.35);transform:translateY(-2px);box-shadow:var(--shadow-dark);}
.step-no{
  font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.14em;
}
.step-card h3{margin-top:10px;font-size:17px;font-weight:700;}
.step-card p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.75;}
.step-card::after{
  content:"";position:absolute;left:20px;right:20px;bottom:0;height:2px;
  background:linear-gradient(90deg,var(--brand),transparent);opacity:0;transition:opacity .25s var(--ease);
}
.step-card:hover::after{opacity:1;}

.media-band{
  position:relative;border-radius:var(--radius-panel);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-dark);
  aspect-ratio:16/9;background:var(--ink-800);
}
.media-band img{width:100%;height:100%;object-fit:cover;}
.media-band__caption{
  position:absolute;left:18px;bottom:18px;right:18px;
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:12px 16px;border-radius:var(--radius-card);
  background:rgba(10,13,16,.82);border:1px solid rgba(255,255,255,.1);
  font-size:13.5px;color:var(--muted);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--radius-tag);
  border:1px solid rgba(23,224,168,.4);color:var(--brand);
  font-size:12px;letter-spacing:.04em;background:rgba(23,224,168,.06);
  white-space:nowrap;
}

/* ============ 对照表 ============ */
.compare-wrap{
  border:1px solid var(--line);border-radius:var(--radius-panel);
  overflow-x:auto;background:var(--ink-900);
}
table.compare{width:100%;min-width:640px;border-collapse:collapse;font-size:14.5px;}
table.compare th,table.compare td{
  padding:16px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;
}
table.compare thead th{
  background:var(--ink-800);color:var(--text);font-weight:700;font-size:13.5px;letter-spacing:.06em;
}
table.compare tbody tr:last-child td{border-bottom:0;}
table.compare tbody tr:hover{background:rgba(23,224,168,.04);}
table.compare td:first-child{color:var(--text);font-weight:600;}
table.compare td{color:var(--muted);}

/* ============ 反白自查区 ============ */
.paper-section{background:var(--paper);color:var(--paper-ink);}
.paper-section .section-label{color:#0B7A5D;}
.paper-section .section-label::before{background:#0B7A5D;}
.paper-section .section-head h2{color:var(--paper-ink);}
.paper-section .section-head p{color:var(--paper-muted);}
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.check-card{
  padding:22px 20px;border-radius:var(--radius-card);
  background:#fff;border:1px solid var(--paper-line);box-shadow:var(--shadow-light);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.check-card:hover{transform:translateY(-2px);border-color:rgba(11,122,93,.4);}
.check-card .check-idx{font-size:12px;font-weight:800;letter-spacing:.14em;color:#0B7A5D;}
.check-card h3{margin-top:8px;font-size:16.5px;font-weight:700;color:var(--paper-ink);}
.check-card p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--paper-muted);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-panel);
  background:var(--ink-900);overflow:hidden;
  transition:border-color .2s var(--ease);
}
.faq-item:hover{border-color:rgba(23,224,168,.28);}
.faq-item.is-open{border-color:rgba(23,224,168,.4);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;text-align:left;font-size:16.5px;font-weight:700;color:var(--text);
  min-height:44px;position:relative;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;
  background:transparent;border-radius:0 3px 3px 0;transition:background .2s var(--ease);
}
.faq-item.is-open .faq-q::before{background:var(--brand);}
.faq-icon{
  width:28px;height:28px;flex:none;border-radius:8px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;position:relative;
  transition:transform .25s var(--ease),border-color .2s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-icon::before{width:12px;height:2px;}
.faq-icon::after{width:2px;height:12px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:rgba(23,224,168,.5);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s var(--ease);
}
.faq-a p{
  padding:0 22px 22px 25px;color:var(--muted);font-size:14.5px;line-height:1.85;
}

/* ============ 上下条分类互链 ============ */
.pager{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;
  padding-top:clamp(40px,5vw,64px);
}
.pager a{
  display:flex;flex-direction:column;gap:6px;
  padding:20px 22px;border:1px solid var(--line);border-radius:var(--radius-panel);
  background:var(--ink-900);transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.pager a:hover{border-color:rgba(23,224,168,.4);transform:translateY(-2px);color:var(--text);}
.pager .pager-dir{font-size:12.5px;letter-spacing:.14em;color:var(--muted);}
.pager .pager-name{font-size:16.5px;font-weight:700;}
.pager a:hover .pager-name{color:var(--brand);}
.pager .pager-next{text-align:right;align-items:flex-end;}

/* ============ 尾部 CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--ink-900);
  padding:clamp(56px,7vw,92px) 0;
  text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px;opacity:.6;
  mask-image:radial-gradient(circle at 50% 50%,#000 0%,transparent 80%);
}
.cta-band__inner{position:relative;z-index:2;max-width:720px;margin:0 auto;}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.3;}
.cta-band p{margin-top:14px;color:var(--muted);font-size:15.5px;}
.cta-band .hero-actions{margin-top:28px;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-950);border-top:1px solid var(--line);
  padding:clamp(48px,6vw,72px) 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-text{color:var(--muted);font-size:14px;line-height:1.8;max-width:340px;}
.footer-col h4{font-size:14.5px;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--muted);}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{font-size:14px;color:var(--muted);line-height:1.8;}
.footer-contact .num{color:var(--text);}
.footer-bar{
  margin-top:clamp(36px,5vw,56px);padding:20px 0;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:110;
  display:inline-flex;align-items:center;gap:10px;
  padding:0 22px;min-height:52px;border-radius:var(--radius-pill);
  background:var(--brand);color:#04140F;font-weight:700;font-size:14.5px;
  box-shadow:0 18px 40px -18px rgba(23,224,168,.6);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s var(--ease),background .18s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--brand-deep);color:#04140F;transform:translateY(-1px);}
.mobile-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:115;
  height:56px;padding:0 14px;gap:10px;align-items:center;
  background:rgba(10,13,16,.96);border-top:1px solid var(--line);
}
.mobile-bar .btn{flex:1;min-height:40px;}

/* ============ 滚动显现 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .container{padding:0 28px;}
  .nav-link{padding:8px 10px;font-size:14px;}
  .search-box{width:190px;}
}
@media (max-width:1024px){
  .nav-menu{display:none;}
  .mobile-toggle{display:inline-flex;}
  .header-actions .search-box{display:none;}
  .header-actions .btn--text{display:none;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .check-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
  .footer-col:last-child{grid-column:1 / -1;}
}
@media (max-width:768px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .header-inner{height:56px;}
  .brand-text{font-size:15.5px;}
  .header-actions{gap:8px;}
  .hero-stats{grid-template-columns:1fr;max-width:420px;}
  .hero-stats .stat{text-align:left;padding:16px 18px;}
  .row-item{grid-template-columns:44px minmax(0,1fr) 32px;gap:14px;padding:14px 12px;}
  .row-icon{width:40px;height:40px;}
  .row-body p{font-size:13.5px;}
  .row-arrow{width:32px;height:32px;}
  .faq-q{font-size:15.5px;padding:18px 16px;}
  .faq-a p{padding:0 16px 18px 19px;}
  .pager{grid-template-columns:1fr;}
  .pager .pager-next{text-align:left;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-col:last-child{grid-column:auto;}
  .footer-text{max-width:none;}
  .float-cta{display:none;}
  .mobile-bar{display:flex;}
  body{padding-bottom:72px;}
  .footer-bar{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:520px){
  .steps{grid-template-columns:1fr;}
  .check-grid{grid-template-columns:1fr;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .row-item{grid-template-columns:40px minmax(0,1fr);}
  .row-arrow{display:none;}
  .media-band__caption{left:12px;right:12px;bottom:12px;font-size:12.5px;}
}
@media (max-width:375px){
  .container{padding:0 16px;}
  .brand-text{font-size:14.5px;}
  .hero-cat h1{font-size:26px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition:none!important;animation:none!important;}
  .reveal{opacity:1;transform:none;}
}