/* roulang page: index */
:root{
  --bg-0:#060D12;
  --bg-1:#0B161D;
  --bg-2:#10222B;
  --line:rgba(31,224,184,.14);
  --line-soft:rgba(255,255,255,.07);
  --accent:#1FE0B8;
  --accent-2:#7CE8FF;
  --warm:#FFB020;
  --text:#E6F2F4;
  --text-2:#9DB4BC;
  --text-3:#5D7681;
  --ok:#35D07F;
  --warn:#FFB020;
  --err:#FF5E68;
  --radius-card:16px;
  --radius-panel:20px;
  --radius-btn:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.8);
  --font-num:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg-0);
  color:var(--text);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:12px}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{list-style:none;padding:0}
input,select,textarea{font:inherit;color:inherit}
::selection{background:rgba(31,224,184,.28);color:#fff}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-tight{padding:64px 0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,13,18,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{background:rgba(6,13,18,.94);box-shadow:0 12px 30px -24px rgba(0,0,0,.9)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(31,224,184,.24),rgba(16,34,43,.92));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.brand-mark svg{width:22px;height:22px;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;letter-spacing:.01em;font-weight:700}
.brand-sub{font-size:12px;color:var(--text-3);letter-spacing:.08em}
.nav-collapse{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-chips{display:flex;gap:8px;flex-wrap:wrap}
.chip-nav{
  padding:8px 18px;border-radius:999px;font-size:14px;color:var(--text-2);
  border:1px solid rgba(255,255,255,.1);
  transition:color .2s,border-color .2s,background .2s,transform .18s;
  white-space:nowrap;
}
.chip-nav:hover{color:var(--text);border-color:rgba(31,224,184,.42);transform:translateY(-1px)}
.chip-nav.active{
  background:var(--accent);color:#04120F;border-color:transparent;font-weight:600;
  box-shadow:inset 0 0 14px rgba(4,18,15,.28),0 8px 22px -14px rgba(31,224,184,.9);
}
.header-cta{border-left:1px solid var(--line-soft);padding-left:24px}
.menu-btn{
  display:none;margin-left:auto;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-soft);background:rgba(255,255,255,.03);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.menu-btn span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s,opacity .2s}
.menu-btn.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 26px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .18s ease,background .2s ease,box-shadow .25s ease,color .2s ease,filter .2s ease;
  white-space:nowrap;
}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-primary{
  background:var(--accent);color:#04120F;
  box-shadow:0 0 0 1px rgba(31,224,184,.5),0 8px 26px -6px rgba(31,224,184,.55);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,224,184,.62),0 12px 34px -8px rgba(31,224,184,.72)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(31,224,184,.5),0 4px 14px -6px rgba(31,224,184,.5)}
.btn-ghost{background:transparent;border-color:rgba(31,224,184,.4);color:var(--accent-2)}
.btn-ghost:hover{background:rgba(31,224,184,.1);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-warm{background:var(--warm);color:#221400;box-shadow:0 10px 28px -10px rgba(255,176,32,.7)}
.btn-warm:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent-2);outline-offset:2px}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  transform:scale(1.02);
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    repeating-linear-gradient(90deg,rgba(255,255,255,.04) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 64px),
    linear-gradient(100deg,rgba(6,13,18,.97) 0%,rgba(6,13,18,.9) 42%,rgba(6,13,18,.62) 72%,rgba(6,13,18,.5) 100%);
}
.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:minmax(0,560px) minmax(0,1fr);
  gap:56px;align-items:center;
  min-height:620px;
  padding-top:72px;padding-bottom:72px;
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--accent-2);
  background:rgba(31,224,184,.1);
  border:1px solid var(--line);
  padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.pill i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block;box-shadow:0 0 0 4px rgba(31,224,184,.16)}
.hero h1{
  font-size:clamp(30px,4.6vw,52px);
  line-height:1.22;
  font-weight:700;
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero-sub{font-size:17px;color:var(--text-2);max-width:520px;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;flex-wrap:wrap;gap:0;margin-top:38px}
.hero-stats li{display:flex;flex-direction:column;gap:2px;padding-right:26px;margin-right:26px;border-right:1px solid var(--line-soft)}
.hero-stats li:last-child{border-right:0;margin-right:0;padding-right:0}
.hero-stats strong{font-family:var(--font-num);font-size:21px;font-weight:700;color:var(--text)}
.hero-stats span{font-size:13px;color:var(--text-3)}

.hero-panel{
  background:linear-gradient(160deg,rgba(31,224,184,.06),rgba(16,34,43,.72));
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-radius:var(--radius-panel);
  padding:18px;
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.hero-panel > img{width:100%;aspect-ratio:16/9;object-fit:cover;margin-bottom:16px;border:1px solid var(--line-soft)}
.panel-title{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);margin-bottom:12px}
.panel-title em{font-style:normal;color:var(--ok)}
.status-list{display:flex;flex-direction:column;gap:10px}
.status-row{
  display:flex;align-items:center;gap:10px;
  padding:11px 14px;border-radius:12px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--line-soft);
  font-size:14px;color:var(--text-2);
}
.status-row em{margin-left:auto;font-style:normal;font-size:13px;color:var(--ok);font-family:var(--font-num)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 4px rgba(53,208,127,.14);flex-shrink:0}
.dot.warn{background:var(--warm);box-shadow:0 0 0 4px rgba(255,176,32,.14)}
.dot.info{background:var(--accent-2);box-shadow:0 0 0 4px rgba(124,232,255,.14)}

/* ---------- section head ---------- */
.section-head{margin-bottom:40px;max-width:720px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.01em;line-height:1.3}
.section-head p{margin-top:12px;color:var(--text-2);font-size:15px}
.section-head.row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.link-more{font-size:14px;color:var(--accent-2);border-bottom:1px solid rgba(124,232,255,.35);padding-bottom:2px;transition:color .2s,border-color .2s}
.link-more:hover{color:#fff;border-color:#fff}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:end}
.step{
  position:relative;
  border:1px solid var(--line);
  border-bottom:0;
  border-radius:16px 16px 0 0;
  padding:18px 18px 22px;
  background:linear-gradient(180deg,rgba(31,224,184,.18),rgba(31,224,184,.02));
  display:flex;flex-direction:column;justify-content:flex-end;gap:6px;
  transition:border-color .2s,transform .2s;
}
.step:hover{border-color:rgba(31,224,184,.5);transform:translateY(-3px)}
.step-1{height:88px}
.step-2{height:112px}
.step-3{height:136px}
.step-4{height:160px}
.step::after{
  content:"";position:absolute;right:-14px;top:50%;width:8px;height:8px;
  border-top:2px dashed rgba(31,224,184,.4);border-right:2px dashed rgba(31,224,184,.4);
  transform:translateY(-50%) rotate(45deg);
}
.step:last-child::after{display:none}
.step-label{font-size:13px;color:var(--accent-2);letter-spacing:.06em}
.step-num{font-family:var(--font-num);font-size:24px;font-weight:700;color:var(--text);line-height:1.1}
.step-desc{font-size:13px;color:var(--text-2)}
.steps-note{margin-top:24px;font-size:13px;color:var(--text-3)}

/* ---------- plans ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.plan-card{
  position:relative;
  border:1px solid rgba(255,255,255,.08);
  border-radius:var(--radius-panel);
  background:linear-gradient(160deg,rgba(31,224,184,.05),rgba(16,34,43,.78));
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  padding:20px;
  display:flex;flex-direction:column;
  transition:transform .22s ease,border-color .22s ease;
}
.plan-card:hover{transform:translateY(-4px);border-color:rgba(31,224,184,.42)}
.plan-card > img{width:100%;aspect-ratio:16/9;object-fit:cover;margin-bottom:18px;border:1px solid var(--line-soft)}
.plan-card.featured{
  border-color:rgba(31,224,184,.55);
  box-shadow:0 0 0 1px rgba(31,224,184,.25),0 22px 48px -24px rgba(31,224,184,.5),inset 0 1px 0 rgba(255,255,255,.08);
  transform:translateY(-12px);
}
.plan-card.featured:hover{transform:translateY(-16px)}
.badge-warm{
  position:absolute;top:-12px;right:18px;
  background:var(--warm);color:#221400;
  font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;
  box-shadow:0 8px 20px -10px rgba(255,176,32,.9);
}
.plan-num{font-family:var(--font-num);font-size:40px;font-weight:700;line-height:1;color:var(--text);letter-spacing:-.02em}
.plan-name{font-size:18px;font-weight:600;margin-top:10px}
.plan-note{font-size:14px;color:var(--text-2);margin-top:8px;min-height:44px}
.plan-list{margin:18px 0 24px;display:flex;flex-direction:column;gap:10px}
.plan-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.6}
.tick{
  flex-shrink:0;width:18px;height:18px;border-radius:50%;
  display:grid;place-items:center;margin-top:3px;
  background:rgba(31,224,184,.16);color:var(--accent);
  font-size:11px;font-weight:700;
}
.plan-card .btn{width:100%;margin-top:auto}

.compare{margin-top:40px;border:1px solid var(--line-soft);border-radius:16px;overflow:hidden;background:rgba(255,255,255,.02)}
.compare-row{
  display:grid;grid-template-columns:1.15fr 1fr 1fr 1fr;
  gap:12px;padding:14px 20px;
  border-bottom:1px solid var(--line-soft);
  font-size:14px;color:var(--text-2);
}
.compare-row:last-child{border-bottom:0}
.compare-row.head{background:rgba(255,255,255,.03);color:var(--text-3);font-size:13px;letter-spacing:.04em}
.compare-row span:first-child{color:var(--text)}
.compare-row.head span:first-child{color:var(--text-3)}

/* ---------- selfcheck ---------- */
.check-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:56px;align-items:center}
.check-copy h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3}
.check-copy p{margin-top:14px;color:var(--text-2);font-size:15px}
.check-copy .btn{margin-top:28px}
.meter-list{display:flex;flex-direction:column;gap:20px;padding:26px;border-radius:var(--radius-panel);border:1px solid var(--line-soft);background:rgba(255,255,255,.02)}
.meter-head{display:flex;justify-content:space-between;font-size:14px;margin-bottom:8px}
.meter-head em{font-style:normal;color:var(--text-3);font-family:var(--font-num)}
.meter{height:8px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden}
.meter i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.meter i.low{background:linear-gradient(90deg,rgba(255,176,32,.9),rgba(255,176,32,.5))}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;
  background:#0F1E27;
  border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(31,224,184,.45);box-shadow:0 24px 46px -22px rgba(0,0,0,.9)}
.news-cover{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-1)}
.news-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .28s ease}
.news-card:hover .news-cover img{transform:scale(1.04)}
.news-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.chip{
  align-self:flex-start;font-size:12px;padding:4px 8px;border-radius:6px;
  background:rgba(31,224,184,.12);color:var(--accent-2);
}
.news-title{
  font-size:17px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card:hover .news-title{color:var(--accent-2)}
.news-desc{
  font-size:14px;color:var(--text-2);line-height:1.65;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-3);
}
.news-meta b{font-weight:500}
.empty-state{
  grid-column:1/-1;
  min-height:240px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed rgba(31,224,184,.28);
  border-radius:var(--radius-card);
  background:rgba(31,224,184,.03);
  padding:40px 24px;text-align:center;
}
.empty-icon{
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(31,224,184,.12);color:var(--accent);font-size:20px;
}
.empty-state p{color:var(--text-2);font-size:15px}

/* ---------- ticker ---------- */
.ticker-bar{
  border-top:1px solid rgba(255,176,32,.35);
  border-bottom:1px solid rgba(255,176,32,.35);
  background:linear-gradient(90deg,rgba(255,176,32,.12),rgba(255,176,32,.04));
  padding:22px 0;
}
.ticker-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.ticker-left{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.tag-warm{
  font-size:12px;font-weight:700;letter-spacing:.08em;
  background:var(--warm);color:#221400;padding:4px 10px;border-radius:6px;
}
.ticker-left p{font-size:15px;color:var(--text)}
.countdown{display:flex;align-items:baseline;gap:4px;font-family:var(--font-num)}
.cd-num{
  display:inline-block;min-width:34px;text-align:center;
  font-size:19px;font-weight:700;color:var(--warm);
  background:rgba(0,0,0,.35);border:1px solid rgba(255,176,32,.28);
  border-radius:8px;padding:2px 6px;
}
.countdown i{font-style:normal;font-size:12px;color:var(--text-3);margin-right:6px}

/* ---------- form ---------- */
.form-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:56px;align-items:start}
.form-copy h2{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.3}
.point-list{margin-top:26px;display:flex;flex-direction:column;gap:16px}
.point-list li{display:flex;gap:12px;font-size:15px;color:var(--text-2)}
.point-dot{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;
  display:grid;place-items:center;margin-top:2px;
  background:rgba(31,224,184,.14);color:var(--accent);font-size:11px;font-weight:700;
}
.contact-card{
  background:linear-gradient(160deg,rgba(31,224,184,.05),rgba(16,34,43,.78));
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  padding:28px;
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:46px;padding:0 14px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.1);
  border-radius:10px;color:var(--text);
  transition:border-color .2s,box-shadow .2s,background .2s;
}
.field textarea{height:120px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(31,224,184,.7);
  box-shadow:0 0 0 3px rgba(31,224,184,.14);
  background:rgba(255,255,255,.05);
}
.field input:invalid:not(:placeholder-shown){border-color:rgba(255,94,104,.7)}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#9DB4BC 50%),linear-gradient(135deg,#9DB4BC 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field select option{background:#0B161D;color:var(--text)}
.form-note{font-size:12px;color:var(--text-3);margin-top:14px}
.form-success{
  display:none;margin-top:16px;padding:12px 16px;border-radius:10px;
  background:rgba(53,208,127,.12);border:1px solid rgba(53,208,127,.4);
  color:var(--ok);font-size:14px;
}
.form-success.show{display:block}

/* ---------- faq ---------- */
.faq-list{border-top:1px solid var(--line-soft);padding-left:14px}
.faq-item{border-bottom:1px solid var(--line-soft);position:relative;transition:background .24s}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 4px;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  transition:color .2s;min-height:56px;
}
.faq-q:hover{color:var(--accent-2)}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;
  display:grid;place-items:center;font-size:16px;line-height:1;
  border:1px solid rgba(255,255,255,.14);color:var(--text-2);
  transition:transform .24s,color .2s,border-color .2s;
}
.faq-item.open{background:rgba(31,224,184,.04)}
.faq-item.open::before{
  content:"";position:absolute;left:-14px;top:12px;bottom:12px;width:3px;border-radius:3px;background:var(--accent);
}
.faq-item.open .faq-icon{color:var(--accent);border-color:rgba(31,224,184,.5);transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{padding:0 40px 20px 4px;font-size:15px;color:var(--text-2);line-height:1.8}

/* ---------- cta band ---------- */
.cta-band{
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  background:linear-gradient(110deg,rgba(31,224,184,.12),rgba(16,34,43,.7));
  padding:36px 40px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(20px,2.4vw,26px);font-weight:700}
.cta-band p{color:var(--text-2);font-size:15px;margin-top:8px}

/* ---------- footer ---------- */
.site-footer{background:#0A141A;border-top:1px solid var(--line-soft);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:300px}
.footer-contact{margin-top:16px;font-size:13px;color:var(--text-3);line-height:1.9}
.footer-col h3{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li{font-size:14px;color:var(--text-2);transition:color .2s}
.footer-col a:hover{color:var(--accent-2)}
.footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero-inner{grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:36px;min-height:560px}
  .check-grid,.form-grid{gap:40px}
  .section{padding:72px 0}
}
@media (max-width:1023px){
  .nav-collapse{
    position:fixed;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:16px;
    background:rgba(8,18,24,.98);
    backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line-soft);
    padding:18px 24px 24px;
    display:none;margin-left:0;
    max-height:calc(100vh - 72px);overflow-y:auto;
  }
  .nav-collapse.open{display:flex}
  .nav-chips{flex-wrap:wrap;gap:10px}
  .header-cta{border-left:0;padding-left:0;border-top:1px solid var(--line-soft);padding-top:16px}
  .header-cta .btn{width:100%}
  .menu-btn{display:flex}
  .hero-inner{grid-template-columns:1fr;min-height:auto;gap:40px;padding-top:56px;padding-bottom:56px}
  .hero-sub{max-width:none}
  .plan-grid{grid-template-columns:repeat(3,minmax(240px,1fr));overflow-x:auto;padding-bottom:12px;gap:18px;scrollbar-width:thin}
  .plan-card.featured{transform:none}
  .plan-card.featured:hover{transform:translateY(-4px)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .check-grid,.form-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr);align-items:stretch}
  .step{height:auto !important;min-height:110px;border-radius:16px 16px 0 0}
  .step::after{display:none}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .header-inner{min-height:64px;gap:12px}
  .nav-collapse{top:64px;padding:16px}
  .brand-text strong{font-size:15px}
  .hero-inner{padding-top:44px;padding-bottom:44px;gap:32px}
  .hero h1{font-size:clamp(26px,7.4vw,34px)}
  .hero-sub{font-size:15px;margin-bottom:26px}
  .hero-actions .btn{flex:1 1 auto;min-width:150px}
  .hero-stats{gap:14px;margin-top:28px}
  .hero-stats li{padding-right:16px;margin-right:16px;border-right:1px solid var(--line-soft)}
  .hero-stats strong{font-size:18px}
  .news-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .compare{overflow-x:auto}
  .compare-row{grid-template-columns:minmax(120px,1.1fr) repeat(3,minmax(90px,1fr));font-size:13px;padding:12px 14px;min-width:520px}
  .cta-band{padding:26px 22px;flex-direction:column;align-items:flex-start}
  .cta-band .btn{width:100%}
  .ticker-inner{flex-direction:column;align-items:flex-start}
  .ticker-inner .btn{width:100%}
  .faq-q{font-size:15px;padding:16px 4px;gap:12px}
  .faq-a p{padding-right:12px}
  .faq-list{padding-left:10px}
  .faq-item.open::before{left:-10px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .contact-card{padding:22px}
  .section-head.row{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:420px){
  .container{padding:0 12px}
  .btn{height:44px;padding:0 18px;font-size:14px}
  .hero-stats li{padding-right:12px;margin-right:12px}
  .meter-list{padding:18px}
  .plan-grid{grid-template-columns:repeat(3,minmax(210px,1fr))}
}

/* roulang page: article */
:root{
  --bg-0:#060D12;
  --bg-1:#0B161D;
  --bg-2:#10222B;
  --card:#0F1E27;
  --line:rgba(31,224,184,.14);
  --line-soft:rgba(255,255,255,.07);
  --accent:#1FE0B8;
  --accent-2:#7CE8FF;
  --warm:#FFB020;
  --text:#E6F2F4;
  --text-2:#9DB4BC;
  --text-3:#5D7681;
  --ok:#35D07F;
  --err:#FF5E68;
  --r-card:16px;
  --r-panel:20px;
  --r-img:12px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.8);
  --shadow-inner:inset 0 1px 0 rgba(255,255,255,.06);
  --ff:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ff-num:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(900px 520px at 82% -8%,rgba(31,224,184,.10),transparent 64%),
    radial-gradient(720px 420px at 6% 6%,rgba(124,232,255,.06),transparent 62%),
    var(--bg-0);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,13,18,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
  transition:background .24s ease,box-shadow .24s ease;
}
.site-header.scrolled{background:rgba(6,13,18,.9);box-shadow:0 10px 30px -22px rgba(0,0,0,.9)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;display:grid;place-items:center;
  border-radius:12px;border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(31,224,184,.16),rgba(16,34,43,.6));
  box-shadow:var(--shadow-inner);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;letter-spacing:-.01em;color:var(--text)}
.brand-sub{font-size:11px;letter-spacing:.16em;color:var(--text-3)}
.nav-collapse{display:flex;align-items:center;gap:20px;margin-left:auto}
.nav-chips{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.chip-nav{
  display:inline-flex;align-items:center;
  padding:8px 18px;font-size:14px;border-radius:999px;
  border:1px solid rgba(255,255,255,.1);
  color:var(--text-2);
  transition:color .18s ease,border-color .18s ease,background-color .18s ease,transform .18s ease;
}
.chip-nav:hover{color:var(--text);border-color:rgba(31,224,184,.42);background:rgba(31,224,184,.06)}
.chip-nav.active{
  background:var(--accent);color:#04140F;border-color:var(--accent);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 6px 18px -10px rgba(31,224,184,.9);
  font-weight:600;
}
.chip-nav.active:hover{color:#04140F}
.header-cta{border-left:1px solid var(--line-soft);padding-left:20px}
.menu-btn{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-soft);background:rgba(255,255,255,.03);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:transform .2s ease,opacity .2s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:999px;
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,filter .18s ease;
  white-space:nowrap;
}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{
  background:var(--accent);color:#04140F;
  box-shadow:0 0 0 1px rgba(31,224,184,.5),0 8px 26px -6px rgba(31,224,184,.55);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,224,184,.6),0 12px 32px -6px rgba(31,224,184,.72)}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(31,224,184,.45),0 4px 14px -8px rgba(31,224,184,.7)}
.btn-ghost{
  background:transparent;color:var(--accent);
  border:1px solid rgba(31,224,184,.4);
}
.btn-ghost:hover{background:rgba(31,224,184,.1);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none}

/* ---------- page scaffolding ---------- */
.page-main{padding:32px 0 0}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:26px;
}
.breadcrumb a{color:var(--text-2);border-bottom:1px solid transparent}
.breadcrumb a:hover{color:var(--accent-2);border-bottom-color:rgba(124,232,255,.4)}
.breadcrumb .sep{color:var(--text-3);opacity:.7}
.breadcrumb .current{color:var(--text-3);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-head{padding-bottom:22px;border-bottom:1px solid var(--line-soft)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:4px 10px;border-radius:6px;
  color:var(--accent);background:rgba(31,224,184,.12);
  border:1px solid rgba(31,224,184,.2);
}
.tag-warm{color:#2A1B00;background:rgba(255,176,32,.85);border-color:rgba(255,176,32,.9);font-weight:600}
.article-head h1{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.32;font-weight:700;letter-spacing:-.01em;
  margin:16px 0 14px;
}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--text-3)}
.article-meta .dot{opacity:.55}
.article-meta span strong{color:var(--text-2);font-weight:500}

/* ---------- article layout ---------- */
.article-wrap{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:44px;
  align-items:start;
  padding:36px 0 64px;
}
.article-body{
  max-width:760px;
  font-size:16px;
  line-height:1.9;
  color:var(--text);
  word-break:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em;color:#D3E4E8}
.article-body h2{
  position:relative;
  font-size:clamp(20px,2.2vw,26px);
  font-weight:700;line-height:1.4;
  margin:2em 0 .8em;
  padding-left:14px;
  border-left:4px solid var(--accent);
  border-radius:2px;
  color:var(--text);
}
.article-body h3{font-size:19px;font-weight:600;margin:1.7em 0 .6em;color:var(--text)}
.article-body h4{font-size:17px;font-weight:600;margin:1.4em 0 .5em;color:var(--text-2)}
.article-body a{color:var(--accent-2);border-bottom:1px solid rgba(124,232,255,.35)}
.article-body a:hover{color:var(--accent);border-bottom-color:rgba(31,224,184,.6)}
.article-body strong{color:#F2FBFC;font-weight:600}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.6em;color:#D3E4E8}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 3px rgba(31,224,184,.12);
}
.article-body ol{counter-reset:li}
.article-body ol li{position:relative;padding-left:28px;margin-bottom:.6em;counter-increment:li;color:#D3E4E8}
.article-body ol li::before{
  content:counter(li);
  position:absolute;left:0;top:.18em;
  width:20px;height:20px;border-radius:6px;
  display:grid;place-items:center;
  font-size:12px;font-family:var(--ff-num);color:var(--accent);
  background:rgba(31,224,184,.12);border:1px solid rgba(31,224,184,.22);
}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;
  border-left:3px solid var(--accent);
  border-radius:12px;
  color:var(--text-2);
  background:linear-gradient(160deg,rgba(31,224,184,.06),rgba(16,34,43,.72));
  box-shadow:var(--shadow-inner);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:1.6em 0 .6em;width:100%;height:auto;background:var(--bg-2)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--text-3);margin-top:10px;text-align:center}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px}
.article-body th,.article-body td{padding:10px 14px;border-bottom:1px solid var(--line-soft);text-align:left}
.article-body th{color:var(--text-2);font-weight:600;background:rgba(255,255,255,.02)}
.article-body hr{border:0;border-top:1px solid var(--line-soft);margin:2.2em 0}
.article-body code{
  font-family:var(--ff-num);font-size:14px;
  padding:2px 6px;border-radius:6px;
  background:rgba(31,224,184,.1);color:var(--accent-2);
}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.side-card{
  background:var(--card);
  border:1px solid var(--line-soft);
  border-radius:var(--r-card);
  padding:20px;
  box-shadow:var(--shadow-card),var(--shadow-inner);
}
.side-card h2{
  font-size:14px;font-weight:600;letter-spacing:.06em;
  color:var(--text-2);margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-card h2::before{content:"";width:4px;height:14px;border-radius:2px;background:var(--accent)}
.toc-list{display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;font-size:13.5px;line-height:1.6;
  color:var(--text-2);padding:6px 10px;border-radius:8px;
  border-left:2px solid transparent;
}
.toc-list a:hover{color:var(--accent);background:rgba(31,224,184,.07);border-left-color:rgba(31,224,184,.5)}
.toc-list a.lv3{padding-left:22px;font-size:13px;color:var(--text-3)}
.toc-empty{font-size:13px;color:var(--text-3);line-height:1.7}
.side-links{display:flex;flex-direction:column;gap:10px}
.side-links a{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;line-height:1.6;color:var(--text-2);
  padding:10px 12px;border-radius:10px;
  border:1px solid transparent;
  background:rgba(255,255,255,.02);
  transition:transform .2s ease,border-color .2s ease,color .2s ease,background-color .2s ease;
}
.side-links a:hover{color:var(--text);border-color:rgba(31,224,184,.35);background:rgba(31,224,184,.05);transform:translateY(-2px)}
.side-links .idx{font-family:var(--ff-num);font-size:12px;color:var(--accent);flex-shrink:0;margin-top:2px}
.side-btn{display:flex;justify-content:center}

/* ---------- empty state ---------- */
.empty-state{
  max-width:760px;
  padding:48px 28px;
  text-align:center;
  border:1px dashed rgba(31,224,184,.28);
  border-radius:var(--r-panel);
  background:linear-gradient(160deg,rgba(31,224,184,.05),rgba(16,34,43,.6));
}
.empty-state .ico{
  width:56px;height:56px;margin:0 auto 16px;border-radius:16px;
  display:grid;place-items:center;
  border:1px solid var(--line);background:rgba(31,224,184,.08);
  color:var(--accent);font-size:22px;font-family:var(--ff-num);
}
.empty-state h2{font-size:20px;font-weight:600;margin-bottom:8px}
.empty-state p{font-size:14px;color:var(--text-2);margin-bottom:20px}

/* ---------- related ---------- */
.section{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.section-head h2{font-size:clamp(20px,2.4vw,26px);font-weight:700}
.section-head p{font-size:14px;color:var(--text-3);margin-top:6px}
.link-more{font-size:14px;color:var(--accent-2)}
.link-more:hover{color:var(--accent)}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rel-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--line-soft);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-card),var(--shadow-inner);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(31,224,184,.45);box-shadow:0 24px 46px -22px rgba(0,0,0,.9),0 0 0 1px rgba(31,224,184,.25)}
.rel-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.04)}
.rel-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:17px;font-weight:600;line-height:1.5}
.rel-body p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-foot{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3);margin-top:auto;padding-top:6px}
.rel-foot .go{color:var(--accent-2)}

/* ---------- back cta ---------- */
.back-wrap{
  border-top:1px solid var(--line-soft);
  padding:40px 0 72px;
  text-align:center;
}
.back-wrap p{font-size:14px;color:var(--text-3);margin-bottom:18px}

/* ---------- footer ---------- */
.site-footer{
  background:#0A141A;
  border-top:1px solid var(--line-soft);
  padding:56px 0 24px;
  margin-top:24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;margin:16px 0 14px;max-width:34ch}
.footer-contact{font-size:13px;color:var(--text-3);line-height:1.9}
.footer-col h3{font-size:14px;font-weight:600;color:var(--text);margin-bottom:14px;letter-spacing:.03em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li{font-size:13.5px;color:var(--text-2);line-height:1.6}
.footer-col a{color:var(--text-2)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:36px;padding-top:20px;
  border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-wrap{gap:32px;grid-template-columns:minmax(0,1fr) 280px}
  .rel-grid{gap:20px}
}
@media (max-width:1023px){
  .menu-btn{display:flex}
  .nav-collapse{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:16px;
    padding:18px 24px 24px;
    background:rgba(8,17,23,.98);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transform:translateY(-10px);opacity:0;pointer-events:none;
    transition:opacity .22s ease,transform .22s ease;
    max-height:calc(100vh - 72px);overflow:auto;
  }
  .nav-collapse.open{transform:none;opacity:1;pointer-events:auto}
  .nav-chips{gap:10px}
  .header-cta{border-left:0;padding-left:0;border-top:1px solid var(--line-soft);padding-top:16px}
  .header-cta .btn{width:100%}
  .article-wrap{grid-template-columns:1fr;gap:32px;padding:28px 0 48px}
  .sidebar{position:static}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .section{padding:44px 0}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .header-inner{min-height:64px;gap:12px}
  .brand-mark{width:34px;height:34px;border-radius:10px}
  .brand-text strong{font-size:15px}
  .page-main{padding-top:22px}
  .breadcrumb{font-size:12px;margin-bottom:18px}
  .breadcrumb .current{white-space:normal;max-width:100%}
  .article-head h1{font-size:24px;margin:12px 0 10px}
  .article-body{font-size:15.5px;line-height:1.85}
  .article-body h2{padding-left:12px;border-left-width:3px}
  .rel-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;margin-top:28px}
  .back-wrap{padding:32px 0 56px}
  .back-wrap .btn{width:100%}
  .side-card{padding:16px}
}
@media (max-width:420px){
  .container{padding:0 12px}
  .chip-nav{padding:7px 14px;font-size:13px}
  .article-body{font-size:15px}
  .rel-body{padding:14px}
  .side-card{padding:14px}
  .empty-state{padding:36px 18px}
}

/* roulang page: category1 */
:root{
  --bg-0:#060D12;
  --bg-1:#0B161D;
  --bg-2:#10222B;
  --line:rgba(31,224,184,.14);
  --line-soft:rgba(255,255,255,.07);
  --accent:#1FE0B8;
  --accent-2:#7CE8FF;
  --warm:#FFB020;
  --text:#E6F2F4;
  --text-2:#9DB4BC;
  --text-3:#5D7681;
  --ok:#35D07F;
  --warn:#FFB020;
  --err:#FF5E68;
  --r-card:16px;
  --r-panel:20px;
  --r-input:10px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.8);
  --shadow-glow:0 0 0 1px rgba(31,224,184,.5),0 8px 26px -6px rgba(31,224,184,.55);
  --container:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg-0);
  background-image:radial-gradient(900px 500px at 12% -8%,rgba(31,224,184,.10),transparent 70%);
  background-repeat:no-repeat;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
a{color:var(--accent-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
button{font:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,13,18,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
  transition:background .25s ease,border-color .25s ease;
}
.site-header.scrolled{background:rgba(6,13,18,.9);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;gap:20px;min-height:74px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text)}
.brand:hover{color:var(--text)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:11px;background:linear-gradient(160deg,rgba(31,224,184,.18),rgba(16,34,43,.9));
  border:1px solid var(--line);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.16em}
.menu-btn{
  display:none;margin-left:auto;
  width:42px;height:42px;border-radius:12px;cursor:pointer;
  background:rgba(255,255,255,.03);border:1px solid var(--line-soft);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .2s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-collapse{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-chips{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.chip-nav{
  display:inline-flex;align-items:center;
  padding:8px 18px;border-radius:999px;
  font-size:14px;color:var(--text-2);
  border:1px solid rgba(255,255,255,.1);
  transition:all .2s ease;white-space:nowrap;
}
.chip-nav:hover{color:var(--text);border-color:var(--line);background:rgba(31,224,184,.08)}
.chip-nav.active{
  color:#06231D;background:var(--accent);border-color:var(--accent);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 6px 18px -8px rgba(31,224,184,.7);
  font-weight:600;
}
.header-cta{padding-left:24px;border-left:1px solid var(--line-soft)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:transform .18s ease,box-shadow .22s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--accent);color:#06231D;box-shadow:var(--shadow-glow)}
.btn-primary:hover{background:var(--accent);color:#06231D;filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(31,224,184,.5),0 12px 32px -6px rgba(31,224,184,.68)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--accent);border-color:rgba(31,224,184,.4)}
.btn-ghost:hover{background:rgba(31,224,184,.1);color:var(--accent);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:9px 20px;font-size:14px}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}

/* ---------- 内页横幅 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line-soft);
  background-image:linear-gradient(100deg,rgba(6,13,18,.96) 0%,rgba(6,13,18,.86) 46%,rgba(6,13,18,.6) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;opacity:.6;
}
.page-hero .container{position:relative;z-index:2;padding-top:38px;padding-bottom:56px}
.breadcrumb{font-size:13px;color:var(--text-3);margin-bottom:22px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"›";color:var(--text-3)}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb [aria-current="page"]{color:var(--text-3)}
.page-hero h1{font-size:clamp(28px,4vw,44px);line-height:1.28;max-width:760px}
.page-hero .hero-lead{margin-top:16px;max-width:640px;color:var(--text-2);font-size:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
  font-size:12px;padding:4px 10px;border-radius:6px;
  color:var(--accent);background:rgba(31,224,184,.1);border:1px solid var(--line);
}
.tag-warm{color:#241703;background:var(--warm);border-color:var(--warm);font-weight:600}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:clamp(23px,3vw,32px);line-height:1.35}
.section-head p{margin-top:12px;color:var(--text-2);font-size:15px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.18em;color:var(--accent);margin-bottom:12px}

/* ---------- 导览布局 ---------- */
.doc-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px;align-items:start}
.anchor-nav{
  position:sticky;top:98px;
  border:1px solid var(--line-soft);border-radius:var(--r-card);
  background:linear-gradient(160deg,rgba(31,224,184,.05),rgba(16,34,43,.7));
  padding:20px 18px;box-shadow:var(--shadow-card);
}
.anchor-nav h2{font-size:13px;letter-spacing:.12em;color:var(--text-3);font-weight:600;margin-bottom:14px}
.anchor-nav ul{display:flex;flex-direction:column;gap:4px}
.anchor-nav a{
  display:flex;align-items:center;gap:8px;
  padding:8px 10px;border-radius:8px;font-size:14px;color:var(--text-2);
  border-left:2px solid transparent;transition:all .18s ease;
}
.anchor-nav a::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--text-3);flex:0 0 5px}
.anchor-nav a:hover,.anchor-nav a.active{
  color:var(--accent);background:rgba(31,224,184,.08);border-left-color:var(--accent);
}
.anchor-nav a:hover::before,.anchor-nav a.active::before{background:var(--accent)}
.anchor-note{margin-top:18px;padding-top:16px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--text-3);line-height:1.7}

.entry-list{display:flex;flex-direction:column;gap:16px}
.entry-card{
  display:grid;grid-template-columns:56px minmax(0,1fr) 40px;gap:18px;align-items:center;
  padding:22px 22px;border-radius:var(--r-card);
  background:#0F1E27;border:1px solid var(--line-soft);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease,border-color .2s ease,background .2s ease;
}
.entry-card:hover{transform:translateY(-4px);border-color:var(--line);background:#11232D}
.entry-icon{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(160deg,rgba(31,224,184,.16),rgba(16,34,43,.9));
  border:1px solid var(--line);
}
.entry-icon svg{width:24px;height:24px;stroke:var(--accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.entry-body h3{font-size:18px;font-weight:600;margin-bottom:6px}
.entry-body p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.entry-body .entry-meta{display:inline-block;margin-top:10px;font-size:12px;color:var(--text-3)}
.entry-arrow{
  width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-soft);color:var(--text-2);font-size:16px;
  transition:all .2s ease;
}
.entry-card:hover .entry-arrow{border-color:var(--accent);color:var(--accent);background:rgba(31,224,184,.1)}

/* ---------- 场景卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.info-card{
  border-radius:var(--r-card);overflow:hidden;
  background:#0F1E27;border:1px solid var(--line-soft);
  box-shadow:var(--shadow-card);
  display:flex;flex-direction:column;
  transition:transform .2s ease,border-color .2s ease;
}
.info-card:hover{transform:translateY(-4px);border-color:var(--line)}
.info-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.info-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.info-card:hover .thumb img{transform:scale(1.04)}
.info-card .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,13,18,0) 40%,rgba(6,13,18,.55) 100%)}
.info-card .card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.info-card h3{font-size:17px}
.info-card p{font-size:14px;color:var(--text-2);line-height:1.7}
.card-foot{margin-top:auto;font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:8px}

/* ---------- 步骤条 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  position:relative;padding:24px 20px;border-radius:var(--r-card);
  background:linear-gradient(160deg,rgba(31,224,184,.06),rgba(16,34,43,.72));
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.step-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:13px;color:var(--accent);letter-spacing:.12em;margin-bottom:12px;display:block;
}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--text-2);line-height:1.7}
.step::after{content:"";position:absolute;top:34px;right:-12px;width:24px;height:1px;background:var(--line);border-top:1px dashed rgba(31,224,184,.3)}
.step:last-child::after{display:none}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:40px;align-items:start}
.faq-list{border:1px solid var(--line);border-radius:var(--r-panel);background:linear-gradient(160deg,rgba(31,224,184,.06),rgba(16,34,43,.72));backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);overflow:hidden}
.faq-item+.faq-item{border-top:1px solid var(--line-soft)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;color:var(--text);
  font-size:15.5px;font-weight:600;text-align:left;cursor:pointer;
  transition:background .2s ease,color .2s ease;
}
.faq-q:hover{background:rgba(31,224,184,.05);color:var(--accent)}
.faq-q .sign{
  flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--accent);font-size:15px;line-height:1;
  transition:transform .24s ease,background .2s ease;
}
.faq-item.open .faq-q{background:rgba(31,224,184,.04);color:var(--accent)}
.faq-item.open .faq-q .sign{transform:rotate(45deg);background:rgba(31,224,184,.14)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a-inner{padding:0 22px 20px;font-size:14.5px;color:var(--text-2);line-height:1.8;border-left:3px solid transparent}
.faq-item.open .faq-a-inner{border-left-color:var(--accent);padding-left:19px}

/* ---------- CTA 通栏 ---------- */
.cta-strip{
  border:1px solid rgba(255,176,32,.35);
  background:linear-gradient(100deg,rgba(255,176,32,.10),rgba(16,34,43,.85));
  border-radius:var(--r-panel);
  padding:30px 34px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  box-shadow:var(--shadow-card);
}
.cta-strip h2{font-size:clamp(19px,2.4vw,24px);margin-bottom:6px}
.cta-strip p{font-size:14px;color:var(--text-2)}
.return-link{display:flex;justify-content:center;margin-top:44px}
.return-link a{font-size:14px;color:var(--text-2);border-bottom:1px dashed rgba(157,180,188,.5);padding-bottom:2px}
.return-link a:hover{color:var(--accent);border-bottom-color:var(--accent)}

/* ---------- 页脚 ---------- */
.site-footer{background:#0A141A;border-top:1px solid var(--line-soft);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand p{margin:16px 0 14px;font-size:14px;color:var(--text-2);line-height:1.75;max-width:340px}
.footer-contact{font-size:13px;color:var(--text-3);line-height:1.9}
.footer-col h3{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col li{font-size:13.5px;color:var(--text-2);line-height:1.6}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:36px;padding-top:24px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--gap:20px}
  .section{padding:76px 0}
}
@media (max-width:1023px){
  .menu-btn{display:flex}
  .nav-collapse{
    position:fixed;left:0;right:0;top:74px;
    flex-direction:column;align-items:stretch;gap:16px;
    padding:20px 24px 28px;
    background:rgba(8,18,24,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -20px rgba(0,0,0,.9);
    transform:translateY(-8px);opacity:0;pointer-events:none;
    transition:opacity .22s ease,transform .22s ease;
    max-height:calc(100vh - 74px);overflow:auto;
  }
  .nav-collapse.open{opacity:1;transform:translateY(0);pointer-events:auto}
  .nav-chips{gap:10px}
  .header-cta{padding-left:0;border-left:0;border-top:1px solid var(--line-soft);padding-top:16px}
  .header-cta .btn{width:100%}
  .doc-layout{grid-template-columns:1fr}
  .anchor-nav{position:static;top:auto}
  .anchor-nav ul{flex-direction:row;flex-wrap:wrap;gap:8px}
  .anchor-nav a{border-left:0;border:1px solid var(--line-soft);border-radius:999px;padding:7px 14px;font-size:13px}
  .anchor-nav a::before{display:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step::after{display:none}
  .faq-wrap{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-strip{flex-direction:column;align-items:flex-start;text-align:left}
  .cta-strip .btn{width:100%}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .page-hero .container{padding-top:28px;padding-bottom:42px}
  .entry-card{grid-template-columns:48px minmax(0,1fr);grid-template-areas:"icon body" ". arrow";row-gap:14px;padding:18px}
  .entry-icon{grid-area:icon;width:48px;height:48px;border-radius:12px}
  .entry-body{grid-area:body}
  .entry-arrow{grid-area:arrow;width:36px;height:36px;justify-self:start}
  .entry-body h3{font-size:16.5px}
  .card-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .hero-actions .btn{width:100%}
  .brand-text strong{font-size:15px}
}
@media (max-width:420px){
  .container{padding:0 12px}
  .header-inner{min-height:66px;gap:12px}
  .page-hero h1{font-size:26px}
  .section{padding:48px 0}
  .cta-strip{padding:22px 18px}
  .faq-q{padding:16px 16px;font-size:14.5px}
  .faq-a-inner{padding:0 16px 18px}
}

/* roulang page: category3 */
:root{
    --bg-0:#060D12;
    --bg-1:#0B161D;
    --bg-2:#10222B;
    --line:rgba(31,224,184,.14);
    --line-soft:rgba(255,255,255,.07);
    --accent:#1FE0B8;
    --accent-2:#7CE8FF;
    --warm:#FFB020;
    --text:#E6F2F4;
    --text-2:#9DB4BC;
    --text-3:#5D7681;
    --ok:#35D07F;
    --warn:#FFB020;
    --err:#FF5E68;
    --radius-card:16px;
    --radius-panel:20px;
    --radius-btn:999px;
    --radius-img:12px;
    --shadow-card:0 18px 40px -20px rgba(0,0,0,.8);
    --shadow-inner:inset 0 1px 0 rgba(255,255,255,.06);
    --max:1200px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg-0);
    color:var(--text);
    font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:var(--radius-img);}
  a{color:var(--accent-2);text-decoration:none;transition:color .2s ease,opacity .2s ease;}
  a:hover{color:var(--accent);}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding-left:1.1em;}
  button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
  input,select,textarea{font-family:inherit;}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

  .container{
    width:100%;
    max-width:var(--max);
    margin:0 auto;
    padding:0 24px;
  }

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(6,13,18,.72);
    border-bottom:1px solid transparent;
    backdrop-filter:blur(12px);
    transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .site-header.scrolled{
    background:rgba(6,13,18,.9);
    border-bottom:1px solid var(--line-soft);
    box-shadow:0 12px 30px -24px rgba(0,0,0,.9);
  }
  .header-inner{
    display:flex;
    align-items:center;
    gap:24px;
    min-height:74px;
    padding-top:12px;
    padding-bottom:12px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    color:var(--text);
    flex:none;
  }
  .brand:hover{color:var(--text);}
  .brand-mark{
    width:36px;height:36px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border-radius:11px;
    background:rgba(31,224,184,.08);
    border:1px solid var(--line);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  }
  .brand-mark svg{width:22px;height:22px;}
  .brand-text{display:flex;flex-direction:column;line-height:1.2;}
  .brand-text strong{font-size:16px;font-weight:700;letter-spacing:-.01em;}
  .brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.14em;margin-top:2px;}

  .nav-collapse{
    display:flex;
    align-items:center;
    justify-content:flex-end;
    gap:24px;
    flex:1;
  }
  .nav-chips{
    display:flex;
    align-items:center;
    gap:8px;
    flex-wrap:wrap;
  }
  .chip-nav{
    display:inline-flex;
    align-items:center;
    padding:8px 18px;
    border-radius:var(--radius-btn);
    font-size:14px;
    color:var(--text-2);
    border:1px solid rgba(255,255,255,.1);
    transition:all .2s ease;
    white-space:nowrap;
  }
  .chip-nav:hover{
    color:var(--text);
    border-color:rgba(31,224,184,.4);
    background:rgba(31,224,184,.08);
  }
  .chip-nav.active{
    background:var(--accent);
    color:#04191A;
    border-color:var(--accent);
    font-weight:600;
    box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 8px 22px -12px rgba(31,224,184,.8);
  }
  .header-cta{
    padding-left:24px;
    border-left:1px solid var(--line-soft);
    display:flex;
    align-items:center;
  }

  .menu-btn{
    display:none;
    margin-left:auto;
    width:44px;height:40px;
    border-radius:10px;
    border:1px solid var(--line-soft);
    background:rgba(255,255,255,.03);
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:5px;
  }
  .menu-btn span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
  .menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:13px 26px;
    border-radius:var(--radius-btn);
    font-size:15px;
    font-weight:600;
    line-height:1;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
    border:1px solid transparent;
    white-space:nowrap;
  }
  .btn-sm{padding:10px 20px;font-size:14px;}
  .btn-primary{
    background:var(--accent);
    color:#04191A;
    box-shadow:0 0 0 1px rgba(31,224,184,.5),0 8px 26px -6px rgba(31,224,184,.55);
  }
  .btn-primary:hover{
    color:#04191A;
    filter:brightness(1.08);
    transform:translateY(-1px);
    box-shadow:0 0 0 1px rgba(31,224,184,.6),0 10px 32px -6px rgba(31,224,184,.7);
  }
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{
    background:transparent;
    color:var(--accent);
    border:1px solid rgba(31,224,184,.4);
  }
  .btn-ghost:hover{
    background:rgba(31,224,184,.1);
    color:var(--accent);
    transform:translateY(-1px);
  }
  .btn-ghost:active{transform:translateY(0);}
  .btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;pointer-events:none;}

  /* ---------- Hero / Banner ---------- */
  .hero{
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--line-soft);
  }
  .hero-bg{
    position:absolute;inset:0;
    background-image:url("/assets/images/backpic/back-1.png");
    background-size:cover;
    background-position:center;
  }
  .hero-bg::after{
    content:"";
    position:absolute;inset:0;
    background:
      linear-gradient(100deg,rgba(6,13,18,.96) 0%,rgba(6,13,18,.86) 46%,rgba(6,13,18,.66) 100%),
      repeating-linear-gradient(0deg,rgba(255,255,255,.04) 0 1px,transparent 1px 42px),
      repeating-linear-gradient(90deg,rgba(255,255,255,.04) 0 1px,transparent 1px 42px);
  }
  .hero-inner{
    position:relative;
    display:grid;
    grid-template-columns:1.15fr .85fr;
    gap:48px;
    align-items:center;
    padding:72px 0 76px;
  }
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--text-3);
    margin-bottom:18px;
    flex-wrap:wrap;
  }
  .breadcrumb a{color:var(--text-2);}
  .breadcrumb a:hover{color:var(--accent);}
  .breadcrumb .sep{color:var(--text-3);}
  .breadcrumb .current{color:var(--text-3);}

  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:12px;
    letter-spacing:.06em;
    color:var(--accent);
    background:rgba(31,224,184,.1);
    border:1px solid var(--line);
    border-radius:6px;
    padding:4px 10px;
    margin-bottom:18px;
  }
  .eyebrow .dot{
    width:6px;height:6px;border-radius:50%;
    background:var(--accent);
    box-shadow:0 0 0 3px rgba(31,224,184,.16);
  }
  .hero h1{
    font-size:clamp(28px,4.2vw,46px);
    line-height:1.22;
    font-weight:700;
    letter-spacing:-.01em;
    margin-bottom:16px;
  }
  .hero h1 .hl{color:var(--accent);}
  .hero-lead{
    font-size:16px;
    color:var(--text-2);
    max-width:520px;
    margin-bottom:28px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
  .hero-stats{
    display:flex;
    flex-wrap:wrap;
    gap:0;
    border-top:1px solid var(--line-soft);
    padding-top:22px;
  }
  .stat{
    padding:0 26px;
    border-left:1px solid var(--line-soft);
  }
  .stat:first-child{padding-left:0;border-left:none;}
  .stat strong{
    display:block;
    font-family:ui-monospace,"Inter",monospace;
    font-size:24px;
    font-weight:700;
    color:var(--accent);
    letter-spacing:-.02em;
  }
  .stat span{font-size:13px;color:var(--text-3);}

  .hero-panel{
    border-radius:var(--radius-panel);
    border:1px solid var(--line);
    background:linear-gradient(160deg,rgba(31,224,184,.08),rgba(16,34,43,.72));
    backdrop-filter:blur(14px);
    box-shadow:var(--shadow-card),var(--shadow-inner);
    padding:16px;
  }
  .hero-panel figure{margin:0 0 14px;}
  .hero-panel img{
    width:100%;
    aspect-ratio:16/9;
    object-fit:cover;
    border-radius:var(--radius-img);
  }
  .panel-title{
    font-size:13px;
    color:var(--text-3);
    letter-spacing:.06em;
    margin:0 0 10px 2px;
  }
  .status-row{
    display:flex;
    align-items:center;
    gap:10px;
    padding:11px 12px;
    border-radius:10px;
    background:rgba(255,255,255,.03);
    border:1px solid rgba(255,255,255,.05);
    font-size:13px;
    color:var(--text-2);
  }
  .status-row + .status-row{margin-top:8px;}
  .status-row .lamp{
    width:8px;height:8px;border-radius:50%;
    flex:none;
  }
  .lamp.ok{background:var(--ok);box-shadow:0 0 0 3px rgba(53,208,127,.16);}
  .lamp.warn{background:var(--warm);box-shadow:0 0 0 3px rgba(255,176,32,.16);}
  .lamp.info{background:var(--accent-2);box-shadow:0 0 0 3px rgba(124,232,255,.16);}
  .status-row b{margin-left:auto;color:var(--text);font-weight:600;font-size:12px;}

  /* ---------- Sections ---------- */
  section{position:relative;}
  .section{padding:88px 0;}
  .section-head{
    max-width:720px;
    margin-bottom:44px;
  }
  .section-head h2{
    font-size:clamp(24px,3vw,34px);
    font-weight:700;
    letter-spacing:-.01em;
    line-height:1.28;
    margin-bottom:12px;
  }
  .section-head p{color:var(--text-2);font-size:15px;}
  .kicker{
    display:inline-block;
    font-size:12px;
    letter-spacing:.16em;
    color:var(--accent);
    margin-bottom:12px;
  }

  /* ---------- Security cards ---------- */
  .card-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
  }
  .sec-card{
    display:flex;
    gap:16px;
    padding:24px;
    border-radius:var(--radius-card);
    background:#0F1E27;
    border:1px solid rgba(255,255,255,.06);
    box-shadow:var(--shadow-card),var(--shadow-inner);
    transition:transform .2s ease,border-color .2s ease,background .2s ease;
  }
  .sec-card:hover{
    transform:translateY(-4px);
    border-color:rgba(31,224,184,.45);
    background:#112430;
  }
  .sec-icon{
    flex:none;
    width:44px;height:44px;
    border-radius:12px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(31,224,184,.1);
    border:1px solid var(--line);
    color:var(--accent);
  }
  .sec-icon svg{width:22px;height:22px;}
  .sec-card h3{font-size:17px;font-weight:600;margin-bottom:8px;line-height:1.4;}
  .sec-card p{font-size:14px;color:var(--text-2);line-height:1.7;}
  .tag{
    display:inline-block;
    font-size:12px;
    padding:4px 8px;
    border-radius:6px;
    background:rgba(31,224,184,.12);
    color:var(--accent);
    margin-top:12px;
  }
  .tag.warm{background:rgba(255,176,32,.14);color:var(--warm);}

  /* ---------- Steps ---------- */
  .steps-band{
    background:linear-gradient(180deg,rgba(16,34,43,.55),rgba(6,13,18,0));
    border-top:1px solid var(--line-soft);
    border-bottom:1px solid var(--line-soft);
  }
  .steps{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:16px;
    counter-reset:step;
  }
  .step{
    position:relative;
    padding:22px 20px;
    border-radius:var(--radius-card);
    border:1px solid rgba(255,255,255,.06);
    background:rgba(255,255,255,.02);
    transition:border-color .2s ease,transform .2s ease;
  }
  .step:hover{border-color:rgba(31,224,184,.4);transform:translateY(-3px);}
  .step .num{
    font-family:ui-monospace,"Inter",monospace;
    font-size:13px;
    color:var(--accent);
    letter-spacing:.1em;
    display:block;
    margin-bottom:14px;
  }
  .step .bar{
    height:4px;
    border-radius:4px;
    background:rgba(255,255,255,.07);
    overflow:hidden;
    margin-bottom:16px;
  }
  .step .bar i{
    display:block;
    height:100%;
    border-radius:4px;
    background:linear-gradient(90deg,var(--accent),var(--accent-2));
  }
  .step h3{font-size:16px;font-weight:600;margin-bottom:6px;}
  .step p{font-size:13px;color:var(--text-2);line-height:1.7;}

  /* ---------- Risk list ---------- */
  .split{
    display:grid;
    grid-template-columns:1.05fr .95fr;
    gap:48px;
    align-items:center;
  }
  .split figure{margin:0;}
  .split figure img{
    width:100%;
    aspect-ratio:4/3;
    object-fit:cover;
    border-radius:var(--radius-card);
    border:1px solid var(--line-soft);
  }
  .risk-list{list-style:none;padding:0;margin:0;}
  .risk-list li{
    display:flex;
    gap:14px;
    padding:16px 0;
    border-bottom:1px solid var(--line-soft);
  }
  .risk-list li:last-child{border-bottom:none;}
  .risk-list .mark{
    flex:none;
    width:24px;height:24px;
    border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:rgba(31,224,184,.12);
    color:var(--accent);
    font-size:13px;
    font-weight:700;
    margin-top:2px;
  }
  .risk-list strong{display:block;font-size:15px;margin-bottom:4px;}
  .risk-list span{font-size:14px;color:var(--text-2);}

  /* ---------- FAQ ---------- */
  .faq-wrap{
    border-radius:var(--radius-panel);
    border:1px solid var(--line);
    background:linear-gradient(160deg,rgba(31,224,184,.06),rgba(16,34,43,.72));
    backdrop-filter:blur(14px);
    padding:8px 24px;
    box-shadow:var(--shadow-card),var(--shadow-inner);
  }
  .faq-item{border-bottom:1px solid var(--line-soft);}
  .faq-item:last-child{border-bottom:none;}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    text-align:left;
    padding:20px 0 20px 0;
    font-size:16px;
    font-weight:600;
    color:var(--text);
    transition:color .2s ease,padding .24s ease;
    border-left:3px solid transparent;
  }
  .faq-q:hover{color:var(--accent);}
  .faq-item.open .faq-q{
    color:var(--accent);
    border-left:3px solid var(--accent);
    padding-left:14px;
  }
  .faq-q .icon{
    flex:none;
    width:24px;height:24px;
    border-radius:50%;
    border:1px solid rgba(31,224,184,.4);
    color:var(--accent);
    display:flex;align-items:center;justify-content:center;
    font-size:15px;
    line-height:1;
    transition:transform .24s ease,background .2s ease;
  }
  .faq-item.open .faq-q .icon{background:rgba(31,224,184,.14);transform:rotate(45deg);}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .24s ease;
  }
  .faq-item.open .faq-a{max-height:360px;}
  .faq-a p{
    font-size:15px;
    color:var(--text-2);
    padding:0 0 22px 17px;
    line-height:1.8;
  }
  .faq-item.open{background:rgba(31,224,184,.04);border-radius:10px;}

  /* ---------- CTA band ---------- */
  .cta-band{
    border-radius:var(--radius-panel);
    border:1px solid rgba(255,176,32,.34);
    background:linear-gradient(100deg,rgba(255,176,32,.1),rgba(16,34,43,.6));
    padding:28px 32px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    flex-wrap:wrap;
  }
  .cta-band h2{
    font-size:clamp(20px,2.4vw,26px);
    font-weight:700;
    margin-bottom:6px;
  }
  .cta-band p{font-size:14px;color:var(--text-2);}

  .back-home{
    text-align:center;
    padding:56px 0 0;
    border-top:1px solid var(--line-soft);
    margin-top:64px;
  }
  .back-home a{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:15px;
    color:var(--text-2);
  }
  .back-home a:hover{color:var(--accent);}

  /* ---------- Footer ---------- */
  .site-footer{
    background:#0A141A;
    border-top:1px solid var(--line-soft);
    padding:64px 0 28px;
    margin-top:88px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1fr;
    gap:40px;
  }
  .footer-brand p{
    font-size:14px;
    color:var(--text-2);
    margin:18px 0;
    max-width:320px;
    line-height:1.8;
  }
  .footer-contact{
    font-size:13px;
    color:var(--text-3);
    line-height:2;
  }
  .footer-col h3{
    font-size:14px;
    font-weight:600;
    color:var(--text);
    margin-bottom:16px;
    letter-spacing:.02em;
  }
  .footer-col ul{list-style:none;padding:0;margin:0;}
  .footer-col li{
    font-size:14px;
    color:var(--text-3);
    margin-bottom:10px;
  }
  .footer-col a{color:var(--text-2);font-size:14px;}
  .footer-col a:hover{color:var(--accent);}
  .footer-bottom{
    margin-top:44px;
    padding-top:24px;
    border-top:1px solid var(--line-soft);
    display:flex;
    justify-content:space-between;
    gap:16px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--text-3);
  }

  /* ---------- Responsive ---------- */
  @media (max-width:1199px){
    .section{padding:76px 0;}
    .hero-inner{gap:36px;padding:60px 0 64px;}
    .header-inner{gap:16px;}
    .chip-nav{padding:8px 14px;}
  }
  @media (max-width:1023px){
    .hero-inner{grid-template-columns:1fr;gap:36px;}
    .hero-panel{max-width:560px;}
    .split{grid-template-columns:1fr;gap:32px;}
    .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
    .nav-collapse{
      position:absolute;
      top:100%;left:0;right:0;
      flex-direction:column;
      align-items:stretch;
      gap:16px;
      padding:18px 24px 24px;
      background:rgba(6,13,18,.98);
      border-bottom:1px solid var(--line-soft);
      box-shadow:0 24px 40px -24px rgba(0,0,0,.9);
      display:none;
    }
    .nav-collapse.open{display:flex;}
    .nav-chips{gap:10px;}
    .header-cta{padding-left:0;border-left:none;border-top:1px solid var(--line-soft);padding-top:16px;}
    .header-cta .btn{width:100%;}
    .menu-btn{display:flex;}
  }
  @media (max-width:767px){
    .container{padding:0 16px;}
    .section{padding:56px 0;}
    .section-head{margin-bottom:28px;}
    .card-grid{grid-template-columns:1fr;}
    .steps{grid-template-columns:1fr;}
    .hero-inner{padding:44px 0 48px;}
    .hero-actions{gap:10px;}
    .hero-actions .btn{flex:1 1 auto;}
    .hero-stats{flex-direction:column;gap:14px;padding-top:18px;}
    .stat{padding:0;border-left:none;}
    .stat strong{font-size:20px;}
    .faq-wrap{padding:4px 16px;}
    .faq-q{font-size:15px;padding:16px 0;}
    .cta-band{padding:24px 20px;}
    .cta-band .btn{width:100%;}
    .site-footer{padding:44px 0 24px;margin-top:56px;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;gap:8px;}
    .brand-text strong{font-size:15px;}
  }
  @media (max-width:420px){
    .container{padding:0 12px;}
    .hero h1{font-size:26px;}
    .btn{padding:12px 18px;font-size:14px;}
    .sec-card{padding:18px;}
  }

/* roulang page: category2 */
:root{
  --bg-0:#060D12;
  --bg-1:#0B161D;
  --bg-2:#10222B;
  --card:#0F1E27;
  --line:rgba(31,224,184,.14);
  --line-soft:rgba(255,255,255,.07);
  --accent:#1FE0B8;
  --accent-2:#7CE8FF;
  --warm:#FFB020;
  --text:#E6F2F4;
  --text-2:#9DB4BC;
  --text-3:#5D7681;
  --ok:#35D07F;
  --err:#FF5E68;
  --radius:16px;
  --radius-lg:20px;
  --radius-sm:10px;
  --shadow:0 18px 40px -20px rgba(0,0,0,.8);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(900px 520px at 10% -10%, rgba(31,224,184,.09), transparent 62%),
    radial-gradient(760px 460px at 92% 2%, rgba(124,232,255,.05), transparent 64%),
    var(--bg-0);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--accent-2);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em}
p{margin:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
::selection{background:rgba(31,224,184,.3);color:#fff}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 26px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease,filter .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent);color:#04231D;
  box-shadow:0 0 0 1px rgba(31,224,184,.5),0 8px 26px -6px rgba(31,224,184,.55);
}
.btn-primary:hover{
  filter:brightness(1.08);transform:translateY(-1px);color:#04231D;
  box-shadow:0 0 0 1px rgba(31,224,184,.6),0 12px 32px -6px rgba(31,224,184,.66);
}
.btn-primary:active{transform:translateY(0);filter:brightness(.98)}
.btn-ghost{
  background:transparent;color:var(--accent);
  border-color:rgba(31,224,184,.4);
}
.btn-ghost:hover{background:rgba(31,224,184,.1);color:var(--accent);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{min-height:38px;padding:0 18px;font-size:14px}
.btn:disabled{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,13,18,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
}
.header-inner{display:flex;align-items:center;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text)}
.brand:hover{color:var(--text)}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(160deg,rgba(31,224,184,.16),rgba(16,34,43,.9));
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.18em}
.menu-btn{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-soft);background:rgba(255,255,255,.03);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:transform .2s ease,opacity .2s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-collapse{display:flex;align-items:center;gap:24px;margin-left:auto}
.nav-chips{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.chip-nav{
  display:inline-flex;align-items:center;
  padding:8px 18px;border-radius:999px;font-size:14px;font-weight:500;
  color:var(--text-2);border:1px solid rgba(255,255,255,.1);
  transition:all .2s ease;
}
.chip-nav:hover{color:var(--text);border-color:rgba(31,224,184,.4);background:rgba(31,224,184,.08)}
.chip-nav.active{
  background:var(--accent);color:#04231D;border-color:transparent;font-weight:600;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 6px 18px -8px rgba(31,224,184,.8);
}
.header-cta{padding-left:24px;border-left:1px solid var(--line-soft)}

/* ---------- 顶部横幅 ---------- */
.page-banner{position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft)}
.banner-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  filter:saturate(.85);
}
.banner-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(6,13,18,.94) 0%,rgba(6,13,18,.82) 46%,rgba(6,13,18,.58) 100%);
}
.banner-inner{position:relative;z-index:2;padding-top:28px;padding-bottom:48px;min-height:260px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:26px}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--text-3)}
.breadcrumb .current{color:var(--text-3)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;color:var(--accent);
  background:rgba(31,224,184,.1);border:1px solid var(--line);
  padding:5px 12px;border-radius:6px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.page-banner h1{font-size:clamp(28px,4.2vw,46px);max-width:820px;letter-spacing:-.02em}
.banner-sub{margin-top:16px;max-width:620px;color:var(--text-2);font-size:16px;line-height:1.8}
.banner-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ---------- 通用板块 ---------- */
.section{padding:76px 0}
.section-alt{background:linear-gradient(180deg,rgba(11,22,29,.7),rgba(6,13,18,0));border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:clamp(22px,2.8vw,32px)}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15.5px}
.section-head .kicker{
  display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--accent-2);
  margin-bottom:12px;padding-bottom:6px;border-bottom:1px solid var(--line);
}

/* ---------- 数据条 ---------- */
.stat-strip{border-bottom:1px solid var(--line-soft);background:rgba(11,22,29,.6)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat-item{padding:28px 24px;border-left:1px solid var(--line-soft)}
.stat-item:first-child{border-left:0;padding-left:0}
.stat-num{font-family:var(--mono);font-size:28px;font-weight:700;color:var(--accent);letter-spacing:-.02em}
.stat-num small{font-size:14px;color:var(--text-2);margin-left:4px;font-weight:500;font-family:inherit}
.stat-label{margin-top:6px;font-size:13.5px;color:var(--text-2)}

/* ---------- 准备清单 ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.prep-card{
  background:var(--card);border:1px solid var(--line-soft);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.prep-card:hover{transform:translateY(-4px);border-color:rgba(31,224,184,.5);box-shadow:0 22px 46px -22px rgba(31,224,184,.35)}
.prep-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(160deg,rgba(31,224,184,.16),rgba(16,34,43,.9));
  border:1px solid var(--line);
}
.prep-icon svg{width:20px;height:20px;stroke:var(--accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.prep-card h3{font-size:17px;font-weight:600;margin-bottom:10px}
.prep-card p{font-size:14px;color:var(--text-2);line-height:1.75}

/* ---------- 步骤进度 ---------- */
.stepper{position:relative;max-width:780px;margin:0 auto 54px;padding:0 4px}
.stepper::before{
  content:"";position:absolute;left:16px;right:16px;top:15px;height:2px;
  background:linear-gradient(90deg,var(--accent),rgba(31,224,184,.12));
}
.stepper-list{position:relative;display:flex;justify-content:space-between;align-items:center}
.step-dot{
  width:32px;height:32px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--bg-2);border:1px solid var(--line);
  font-family:var(--mono);font-size:12px;font-weight:700;color:var(--accent);
  box-shadow:0 0 0 4px rgba(6,13,18,.9);
}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;max-width:1060px;margin:0 auto}
.timeline::before{
  content:"";position:absolute;top:8px;bottom:8px;left:50%;width:2px;
  transform:translateX(-50%);
  background:linear-gradient(180deg,rgba(31,224,184,.5),rgba(31,224,184,.12) 60%,rgba(31,224,184,0));
}
.tl-item{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:72px;margin-bottom:44px}
.tl-item:last-child{margin-bottom:0}
.tl-node{
  position:absolute;left:50%;top:26px;transform:translateX(-50%);
  width:42px;height:42px;border-radius:50%;
  display:grid;place-items:center;z-index:3;
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--accent);
  background:linear-gradient(160deg,rgba(31,224,184,.2),rgba(16,34,43,.96));
  border:1px solid rgba(31,224,184,.45);
  box-shadow:0 0 20px -6px rgba(31,224,184,.6);
}
.tl-card{
  grid-column:1;
  background:var(--card);border:1px solid var(--line-soft);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s ease;
}
.tl-item:nth-child(even) .tl-card{grid-column:2}
.tl-card:hover{transform:translateY(-4px);border-color:rgba(31,224,184,.45)}
.tl-media{position:relative;aspect-ratio:16/9;background:var(--bg-2);overflow:hidden}
.tl-media img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease}
.tl-card:hover .tl-media img{transform:scale(1.04)}
.tl-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,13,18,0) 40%,rgba(6,13,18,.55))}
.tl-body{padding:22px 24px 26px}
.tl-tag{
  display:inline-block;font-size:12px;padding:4px 8px;border-radius:6px;
  background:rgba(31,224,184,.12);color:var(--accent);margin-bottom:12px;
}
.tl-body h3{font-size:19px;font-weight:600;margin-bottom:10px}
.tl-body p{font-size:14.5px;color:var(--text-2);line-height:1.8}
.tl-list{margin-top:14px;display:grid;gap:8px}
.tl-list li{position:relative;padding-left:18px;font-size:14px;color:var(--text-2)}
.tl-list li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px rgba(31,224,184,.7);
}

/* ---------- 提示对照 ---------- */
.notice-panel{
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(31,224,184,.06),rgba(16,34,43,.72));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:10px 26px;box-shadow:var(--shadow);
}
.notice-row{display:grid;grid-template-columns:260px 1fr;gap:26px;padding:20px 0;border-bottom:1px solid var(--line-soft);align-items:start}
.notice-row:last-child{border-bottom:0}
.notice-key{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:13.5px;color:var(--warm);
}
.notice-key::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--warm);flex:0 0 7px;box-shadow:0 0 10px rgba(255,176,32,.6)}
.notice-val{font-size:14.5px;color:var(--text-2);line-height:1.8}
.notice-val strong{color:var(--text);font-weight:600}

/* ---------- 设备说明 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split-media{
  position:relative;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line-soft);background:var(--bg-2);box-shadow:var(--shadow);
}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split-media::after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(6,13,18,.06),rgba(6,13,18,.5))}
.device-list{display:grid;gap:14px;margin-top:26px}
.device-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 18px;border-radius:12px;
  background:rgba(255,255,255,.025);border:1px solid var(--line-soft);
  transition:border-color .2s ease,background-color .2s ease;
}
.device-item:hover{border-color:rgba(31,224,184,.4);background:rgba(31,224,184,.05)}
.device-badge{
  flex:0 0 auto;font-family:var(--mono);font-size:12px;color:var(--accent);
  border:1px solid var(--line);border-radius:6px;padding:3px 8px;margin-top:2px;
}
.device-item p{font-size:14.5px;color:var(--text-2)}
.device-item p b{color:var(--text);font-weight:600}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item{
  border:1px solid var(--line-soft);border-left:3px solid transparent;
  border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(31,224,184,.05),rgba(16,34,43,.7));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:border-color .2s ease,background-color .2s ease;
}
.faq-item:hover{border-color:rgba(31,224,184,.28);border-left-color:rgba(31,224,184,.3)}
.faq-item[open]{border-left-color:var(--accent);background:rgba(31,224,184,.06)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;min-height:56px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-family:var(--mono);font-size:20px;font-weight:400;
  color:var(--accent);line-height:1;flex:0 0 auto;
}
.faq-item[open] summary::after{content:"−"}
.faq-item[open] summary{color:var(--accent-2)}
.faq-body{padding:0 22px 20px;font-size:14.5px;color:var(--text-2);line-height:1.85;animation:fadeIn .24s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- CTA 条 ---------- */
.cta-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:30px 34px;border-radius:var(--radius-lg);
  border:1px solid rgba(255,176,32,.34);
  background:linear-gradient(100deg,rgba(255,176,32,.1),rgba(16,34,43,.7) 55%,rgba(31,224,184,.06));
  box-shadow:var(--shadow);
}
.cta-bar h2{font-size:clamp(19px,2.4vw,25px)}
.cta-bar p{margin-top:8px;font-size:14.5px;color:var(--text-2)}
.back-home{text-align:center;margin-top:44px}
.back-home a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;color:var(--text-2);
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.back-home a:hover{color:var(--accent);border-bottom-color:rgba(31,224,184,.5)}

/* ---------- 页脚 ---------- */
.site-footer{background:#0A141A;border-top:1px solid var(--line-soft);margin-top:80px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:60px 0 44px}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--text-2);max-width:330px;line-height:1.8}
.footer-contact{margin-top:16px;font-size:13.5px;color:var(--text-3);line-height:1.9}
.footer-col h3{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:11px}
.footer-col li,.footer-col a{font-size:13.5px;color:var(--text-2)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;margin-top:24px;border-top:1px solid var(--line-soft);
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .section{padding:68px 0}
  .split{gap:40px}
}
@media (max-width:1023px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .stat-item{padding:22px 20px}
  .stat-item:nth-child(odd){border-left:0;padding-left:0}
  .stat-item:nth-child(3),.stat-item:nth-child(4){border-top:1px solid var(--line-soft)}
  .split{grid-template-columns:1fr;gap:32px}
  .notice-row{grid-template-columns:1fr;gap:8px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .tl-item{gap:56px}
}
@media (max-width:900px){
  .menu-btn{display:flex}
  .header-inner{min-height:64px;justify-content:space-between}
  .nav-collapse{
    display:none;position:fixed;left:0;right:0;top:64px;
    flex-direction:column;align-items:stretch;gap:16px;margin-left:0;
    padding:18px 20px 24px;
    background:rgba(6,13,18,.98);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line-soft);
    box-shadow:0 24px 48px -24px rgba(0,0,0,.9);
    max-height:calc(100vh - 64px);overflow-y:auto;
  }
  .nav-collapse.open{display:flex}
  .nav-chips{gap:10px}
  .chip-nav{padding:8px 16px;font-size:14px}
  .header-cta{padding-left:0;border-left:0;border-top:1px solid var(--line-soft);padding-top:16px}
  .header-cta .btn{width:100%}
}
@media (max-width:860px){
  .timeline::before{left:20px;transform:none}
  .tl-item{grid-template-columns:1fr;gap:0;margin-bottom:32px}
  .tl-card{grid-column:1 !important;margin-left:56px}
  .tl-node{left:20px;transform:translateX(-50%);top:20px;width:36px;height:36px}
  .stepper{display:none}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .banner-inner{padding-top:22px;padding-bottom:36px;min-height:0}
  .page-banner h1{font-size:30px}
  .banner-sub{font-size:15px}
  .banner-actions .btn{flex:1 1 auto;min-width:150px}
  .grid-4{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .stat-item{border-left:0;padding-left:0;border-top:1px solid var(--line-soft)}
  .stat-item:first-child{border-top:0}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding:44px 0 32px}
  .footer-bottom{flex-direction:column;gap:8px;font-size:12.5px}
  .cta-bar{padding:24px 20px;flex-direction:column;align-items:flex-start}
  .cta-bar .btn{width:100%}
  .notice-panel{padding:6px 18px}
  .tl-body{padding:18px 18px 22px}
  .faq-item summary{padding:16px 16px;font-size:15px}
  .faq-body{padding:0 16px 18px}
}
@media (max-width:420px){
  .container{padding:0 12px}
  .brand-text strong{font-size:15px}
  .brand-mark{width:34px;height:34px;flex-basis:34px}
  .page-banner h1{font-size:26px}
  .tl-card{margin-left:46px}
  .timeline::before{left:14px}
  .tl-node{left:14px;width:32px;height:32px;font-size:12px}
  .btn{min-height:44px;padding:0 20px;font-size:14px}
}