/* roulang page: index */
:root{
  --bg-900:#060D14;
  --bg-800:#0B1520;
  --bg-700:#101E2B;
  --glass:rgba(18,32,45,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --text-1:#EAF2F7;
  --text-2:#9FB2C0;
  --text-3:#6C8091;
  --brand:#2BE0B0;
  --brand-deep:#0E7C68;
  --accent:#FF5A36;
  --grad-cta:linear-gradient(135deg,#FF7A45,#FF4A22);
  --glow-brand:0 0 0 1px rgba(43,224,176,.35),0 8px 32px rgba(43,224,176,.22);
  --glow-accent:0 0 24px rgba(255,90,54,.45);
  --r-card:18px;
  --r-btn:12px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.04),0 12px 40px rgba(0,0,0,.45);
  --shadow-soft:0 18px 50px rgba(0,0,0,.5);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(900px 500px at 80% -10%,rgba(43,224,176,.10),transparent 62%),
    radial-gradient(760px 440px at 2% 14%,rgba(255,90,54,.055),transparent 60%);
}
img{max-width:100%;display:block}
a{color:var(--text-1);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand)}
ul,ol{padding-left:0;list-style:none;margin:0}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;color:var(--text-1);letter-spacing:-.01em}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700}
h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25;font-weight:650}
h3{font-size:20px;line-height:1.4;font-weight:600}
::selection{background:rgba(43,224,176,.28);color:#fff}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media(min-width:1400px){.wrap{max-width:1280px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1030;
  background:rgba(6,13,20,.72);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:height .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease);
}
.site-header.is-scrolled{
  box-shadow:0 12px 34px rgba(0,0,0,.5);
  background:rgba(6,13,20,.92);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:68px;
  transition:height .22s var(--ease);
}
.site-header.is-scrolled .header-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  border:1px solid rgba(43,224,176,.4);
  border-radius:11px;
  background:linear-gradient(160deg,rgba(43,224,176,.16),rgba(43,224,176,.02));
  color:var(--brand);
}
.brand-text{
  font-size:16px;
  font-weight:650;
  letter-spacing:.01em;
  color:var(--text-1);
  white-space:nowrap;
}
.main-nav{margin-left:auto}
.main-nav ul{display:flex;align-items:center;gap:32px}
.main-nav a{
  position:relative;
  font-size:14px;
  color:var(--text-2);
  padding:6px 0;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--text-1)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.is-active{color:var(--text-1)}
.main-nav a.is-active::after{transform:scaleX(1)}
.main-nav a.is-active::before{
  content:"";
  position:absolute;
  left:-12px;top:50%;
  width:4px;height:4px;
  margin-top:-2px;
  border-radius:50%;
  background:var(--brand);
}
.header-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.nav-toggle{
  display:none;
  width:42px;height:38px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:transparent;
  cursor:pointer;
  padding:0;
  position:relative;
}
.nav-toggle span{
  position:absolute;
  left:11px;right:11px;
  height:1.5px;
  background:var(--text-1);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(3px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){transform:translateY(-3px) rotate(-45deg)}

.drawer-mask{
  position:fixed;inset:0;
  background:rgba(3,7,11,.6);
  opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),visibility .22s var(--ease);
  z-index:1035;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;
  top:0;right:0;
  width:min(82vw,340px);
  height:100%;
  background:var(--bg-800);
  border-left:1px solid var(--line-strong);
  z-index:1040;
  transform:translateX(100%);
  transition:transform .28s var(--ease);
  padding:26px 22px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-title{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-3);margin-bottom:18px}
.drawer ul{display:flex;flex-direction:column;gap:4px}
.drawer li a{
  display:block;
  font-size:19px;
  padding:14px 4px;
  color:var(--text-1);
  border-bottom:1px solid var(--line);
  opacity:0;
  transform:translateY(8px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.drawer.is-open li a{opacity:1;transform:translateY(0)}
.drawer.is-open li:nth-child(1) a{transition-delay:.06s}
.drawer.is-open li:nth-child(2) a{transition-delay:.12s}
.drawer.is-open li:nth-child(3) a{transition-delay:.18s}
.drawer-cta{margin-top:26px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  padding:15px 26px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{
  background:var(--grad-cta);
  color:#fff;
  box-shadow:var(--glow-accent);
}
.btn-primary:hover{
  color:#fff;
  transform:translateY(-2px);
  filter:brightness(1.06);
  box-shadow:0 0 32px rgba(255,90,54,.6);
}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 12px rgba(255,90,54,.4)}
.btn-ghost{
  background:transparent;
  border-color:rgba(43,224,176,.45);
  color:var(--brand);
}
.btn-ghost:hover{
  background:rgba(43,224,176,.12);
  color:var(--brand);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:11px 18px;font-size:13.5px}
.btn-block{width:100%}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--brand);
  border-bottom:1px solid rgba(43,224,176,.35);
  padding-bottom:2px;
}
.link-arrow svg{transition:transform .2s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- 通用板块 ---------- */
main{position:relative;z-index:1}
.section{padding:96px 0}
.section-alt{background:var(--bg-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:48px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--brand);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--brand)}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15.5px;max-width:72ch}

.card-glass{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card-glass:hover{
  transform:translateY(-4px);
  border-color:rgba(43,224,176,.35);
  box-shadow:var(--shadow-card),var(--glow-brand);
}

.badge-pill{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(43,224,176,.12);
  color:var(--brand);
  border:1px solid rgba(43,224,176,.22);
}
.badge-pill.alt{background:rgba(255,90,54,.12);color:#FF8A6A;border-color:rgba(255,90,54,.28)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:132px 0 64px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero::after{
  content:"";
  position:absolute;
  right:-160px;top:120px;
  width:620px;height:620px;
  border-radius:50%;
  border:1px solid rgba(43,224,176,.14);
  pointer-events:none;
}
.hero::before{
  content:"";
  position:absolute;
  right:-60px;top:300px;
  width:420px;height:420px;
  border-radius:50%;
  border:1px dashed rgba(255,255,255,.08);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
  min-height:600px;
}
.hero-copy h1{margin-bottom:20px}
.hero-copy .lead{
  font-size:19px;
  line-height:1.75;
  color:var(--text-2);
  max-width:34em;
  margin-bottom:32px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-note{
  margin-top:26px;
  font-size:13.5px;
  color:var(--text-3);
  display:flex;
  align-items:center;
  gap:8px;
}
.pulse-dot{
  width:8px;height:8px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 0 4px rgba(43,224,176,.16);
  animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 4px rgba(43,224,176,.16)}
  50%{box-shadow:0 0 0 9px rgba(43,224,176,.04)}
}
.hero-visual{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-soft);
  aspect-ratio:16/12;
}
.hero-visual img{
  width:100%;height:100%;
  object-fit:cover;
  transform:scale(1.02);
}
.hero-visual .veil{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,13,20,.15) 0%,rgba(6,13,20,.62) 68%,rgba(6,13,20,.92) 100%);
}
.hero-visual .mesh{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.5;
}
.float-card{
  position:absolute;
  left:20px;bottom:20px;
  right:20px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 16px;
  border-radius:14px;
  background:rgba(11,21,32,.78);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.float-card strong{font-size:14px;font-weight:650;display:block;line-height:1.4}
.float-card span{font-size:12.5px;color:var(--text-3)}

.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  margin-top:60px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-strip li{
  padding:24px 22px;
  border-right:1px solid var(--line);
}
.stat-strip li:last-child{border-right:0}
.stat-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-variant-numeric:tabular-nums;
  font-size:30px;
  font-weight:650;
  color:var(--text-1);
  line-height:1.2;
}
.stat-num small{font-size:15px;color:var(--text-2);margin-left:2px}
.stat-label{font-size:13px;color:var(--text-3);margin-top:4px}

/* ---------- 能力卡 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.feature-card{padding:28px 24px}
.feature-icon{
  width:46px;height:46px;
  border-radius:13px;
  display:grid;place-items:center;
  background:rgba(43,224,176,.10);
  border:1px solid rgba(43,224,176,.22);
  color:var(--brand);
  margin-bottom:20px;
}
.feature-card h3{margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--text-2);margin-bottom:0}
.feature-list{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.feature-list li{
  font-size:13.5px;
  color:var(--text-2);
  padding-left:16px;
  position:relative;
}
.feature-list li::before{
  content:"";
  position:absolute;
  left:0;top:9px;
  width:5px;height:5px;
  background:var(--brand);
  border-radius:1px;
}

/* ---------- 步骤 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  position:relative;
}
.step-card{padding:30px 26px;position:relative}
.step-card::after{
  content:"";
  position:absolute;
  right:-24px;top:52px;
  width:24px;
  border-top:1px dashed rgba(255,255,255,.16);
}
.step-card:last-child::after{display:none}
.step-no{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:38px;
  font-weight:700;
  line-height:1;
  color:rgba(43,224,176,.28);
  margin-bottom:16px;
  letter-spacing:-.02em;
}
.step-card h3{margin-bottom:10px}
.step-card p{font-size:14.5px;color:var(--text-2);margin-bottom:0}

/* ---------- 图文带 ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.split-img{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line-strong);
  aspect-ratio:4/3;
  box-shadow:var(--shadow-soft);
}
.split-img img{width:100%;height:100%;object-fit:cover}
.split-copy h2{margin-bottom:18px}
.split-copy p{color:var(--text-2);font-size:15.5px}
.num-list{margin-top:26px;display:flex;flex-direction:column}
.num-list li{
  display:grid;
  grid-template-columns:52px 1fr;
  gap:16px;
  padding:18px 0;
  border-top:1px solid var(--line);
  align-items:start;
}
.num-list li:last-child{border-bottom:1px solid var(--line)}
.num-idx{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:18px;
  font-weight:650;
  color:var(--brand);
  line-height:1.5;
}
.num-list strong{display:block;font-size:15.5px;font-weight:650;margin-bottom:4px}
.num-list span{font-size:14px;color:var(--text-2)}

/* ---------- 案例卡 ---------- */
.case-card{overflow:hidden;display:flex;flex-direction:column}
.case-thumb{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.case-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.case-card:hover .case-thumb img{transform:scale(1.03)}
.case-thumb::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:56px;
  background:linear-gradient(180deg,transparent,rgba(6,13,20,.85));
}
.case-body{padding:22px 20px 20px}
.case-body h3{font-size:17.5px;margin:12px 0 10px}
.case-body p{font-size:14px;color:var(--text-2);margin-bottom:16px}
.case-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}
.quote-band{
  margin-top:32px;
  padding:30px 32px;
  border-radius:var(--r-card);
  background:var(--bg-700);
  border:1px solid var(--line);
  position:relative;
}
.quote-band::before{
  content:"“";
  position:absolute;
  left:20px;top:6px;
  font-size:64px;
  line-height:1;
  color:rgba(43,224,176,.22);
  font-family:Georgia,serif;
}
.quote-band p{
  position:relative;
  font-size:17px;
  color:var(--text-1);
  margin:0 0 14px 26px;
  line-height:1.8;
}
.quote-band span{display:block;margin-left:26px;font-size:13.5px;color:var(--text-3)}

/* ---------- FAQ ---------- */
.faq-accordion .accordion-item{
  background:transparent;
  border:0;
  border-top:1px solid var(--line);
  border-radius:0;
}
.faq-accordion .accordion-item:last-child{border-bottom:1px solid var(--line)}
.faq-accordion .accordion-button{
  background:transparent;
  color:var(--text-1);
  font-size:16.5px;
  font-weight:600;
  padding:22px 44px 22px 18px;
  border-radius:0;
  box-shadow:none;
  position:relative;
  transition:color .2s var(--ease);
}
.faq-accordion .accordion-button::before{
  content:"";
  position:absolute;
  left:0;top:18px;bottom:18px;
  width:2px;
  background:var(--brand);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .22s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed){color:var(--brand);box-shadow:none;background:transparent}
.faq-accordion .accordion-button:not(.collapsed)::before{transform:scaleY(1)}
.faq-accordion .accordion-button:focus{box-shadow:none;outline:2px solid var(--brand);outline-offset:-2px}
.faq-accordion .accordion-button::after{
  width:14px;height:14px;
  background-image:none;
  border-right:1.5px solid currentColor;
  border-bottom:1.5px solid currentColor;
  transform:rotate(45deg);
  margin-left:auto;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.faq-accordion .accordion-button:not(.collapsed)::after{transform:rotate(225deg);color:var(--brand)}
.faq-accordion .accordion-body{
  padding:0 44px 24px 18px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.85;
  margin-left:0;
  border-left:2px solid rgba(43,224,176,.35);
  padding-left:18px;
}

/* ---------- 最新信息 ---------- */
.post-card{
  display:flex;
  flex-direction:column;
  height:100%;
  overflow:hidden;
}
.post-thumb{
  position:relative;
  aspect-ratio:4/3;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  display:block;
}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-thumb::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:48px;
  background:linear-gradient(180deg,transparent,rgba(6,13,20,.8));
}
.post-body{padding:20px;display:flex;flex-direction:column;flex:1}
.post-body h3{font-size:17.5px;line-height:1.5;margin:12px 0 10px}
.post-body h3 a:hover{color:var(--brand)}
.post-body .excerpt{
  font-size:14px;
  color:var(--text-2);
  margin-bottom:18px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}
.post-foot .more{display:inline-flex;align-items:center;gap:6px;color:var(--text-2)}
.post-card:hover .post-foot .more{color:var(--brand)}
.post-foot .more svg{transition:transform .2s var(--ease)}
.post-card:hover .post-foot .more svg{transform:translateX(4px)}
.empty-state{
  text-align:center;
  padding:56px 24px;
  border:1px dashed var(--line-strong);
  border-radius:var(--r-card);
  color:var(--text-2);
}
.empty-state svg{color:var(--text-3);margin-bottom:14px}
.empty-state p{font-size:15px;margin-bottom:10px}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;
  padding:80px 0;
  background:
    radial-gradient(620px 320px at 72% 20%,rgba(43,224,176,.10),transparent 65%),
    var(--bg-800);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.cta-inner{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:56px;
  align-items:center;
  position:relative;
  z-index:1;
}
.cta-inner h2{margin-bottom:16px}
.cta-inner p{color:var(--text-2);font-size:15.5px;max-width:62ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.form-card{padding:28px 26px}
.form-card h3{font-size:18px;margin-bottom:6px}
.form-card .hint{font-size:13.5px;color:var(--text-3);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:7px}
.field input,.field textarea{
  width:100%;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line-strong);
  border-radius:var(--r-btn);
  color:var(--text-1);
  font-size:14.5px;
  padding:13px 14px;
  font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field textarea{resize:vertical;min-height:92px}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(43,224,176,.14);
}
.form-foot{display:flex;justify-content:flex-end}
.form-tip{margin-top:12px;font-size:13px;color:var(--text-3)}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-900);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  color:var(--text-2);
  max-width:34ch;
}
.footer-col h4{
  font-size:14px;
  font-weight:650;
  color:var(--text-1);
  margin-bottom:18px;
  letter-spacing:.02em;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand)}
.footer-col .with-icon{display:inline-flex;align-items:center;gap:8px}
.footer-col svg{color:var(--text-3);transition:color .2s var(--ease)}
.footer-col a:hover svg{color:var(--brand)}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 26px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media(max-width:1199.98px){
  .main-nav ul{gap:24px}
  .hero-grid{grid-template-columns:1fr;gap:40px;min-height:0}
  .hero{padding:118px 0 56px}
  .hero-visual{max-width:640px}
  .split{gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .cta-inner{grid-template-columns:1fr;gap:36px}
}
@media(max-width:991.98px){
  .main-nav{display:none}
  .nav-toggle{display:block}
  .section{padding:64px 0}
  .grid-3{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr;gap:16px}
  .step-card::after{display:none}
  .split{grid-template-columns:1fr;gap:32px}
  .stat-strip{grid-template-columns:1fr 1fr}
  .stat-strip li:nth-child(2){border-right:0}
  .stat-strip li:nth-child(1),.stat-strip li:nth-child(2){border-bottom:1px solid var(--line)}
}
@media(max-width:767.98px){
  .wrap{padding:0 18px}
  .section{padding:48px 0}
  .section-head{margin-bottom:32px}
  .hero{padding:104px 0 44px}
  .hero-copy .lead{font-size:17px}
  .hero-cta .btn{width:100%}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .hero::after,.hero::before{display:none}
  .stat-strip{margin-top:40px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .faq-accordion .accordion-button{font-size:15.5px;padding:18px 36px 18px 14px}
  .faq-accordion .accordion-body{padding:0 20px 20px 14px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media(max-width:575.98px){
  .wrap{padding:0 16px}
  h1{font-size:27px}
  .stat-strip{grid-template-columns:1fr}
  .stat-strip li{border-right:0;border-bottom:1px solid var(--line)}
  .stat-strip li:last-child{border-bottom:0}
  .hero-visual{aspect-ratio:4/3}
  .quote-band{padding:24px 20px}
  .quote-band p{font-size:15.5px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: category1 */
:root{
  --bg-900:#060D14;
  --bg-800:#0B1520;
  --bg-700:#101E2B;
  --glass:rgba(18,32,45,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --text-1:#EAF2F7;
  --text-2:#9FB2C0;
  --text-3:#6C8091;
  --brand:#2BE0B0;
  --brand-deep:#0E7C68;
  --accent:#FF5A36;
  --grad-cta:linear-gradient(135deg,#FF7A45,#FF4A22);
  --glow-brand:0 0 0 1px rgba(43,224,176,.35), 0 8px 32px rgba(43,224,176,.22);
  --glow-accent:0 0 24px rgba(255,90,54,.45);
  --r-card:18px;
  --r-btn:12px;
  --r-input:12px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.04), 0 12px 40px rgba(0,0,0,.45);
  --shadow-soft:0 8px 24px rgba(0,0,0,.32);
  --sp-1:8px; --sp-2:16px; --sp-3:24px; --sp-4:32px; --sp-6:48px; --sp-8:64px; --sp-12:96px;
  --font-sans:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular","JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.9;
}
body > *{position:relative;z-index:1;}
img{max-width:100%;display:block;}
a{color:var(--text-1);text-decoration:none;transition:color .2s ease-out,border-color .2s ease-out,opacity .2s ease-out;}
a:hover{color:var(--brand);}
button{font-family:inherit;}
p{margin:0 0 var(--sp-2);}
h1,h2,h3,h4{margin:0;color:var(--text-1);letter-spacing:-.01em;}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700;}
h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25;font-weight:650;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
h4{font-size:15px;line-height:1.5;font-weight:600;letter-spacing:.06em;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.wrap{max-width:1280px;}}
.section{padding:var(--sp-12) 0;}
.section--tight{padding:var(--sp-8) 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--brand);font-weight:600;margin-bottom:var(--sp-2);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:block;}
.lead{font-size:17px;color:var(--text-2);max-width:72ch;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ---------- Buttons ---------- */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:none;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
  white-space:nowrap;
}
.btn-x--primary{background:var(--grad-cta);color:#fff;box-shadow:var(--glow-accent);}
.btn-x--primary:hover{color:#fff;transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 0 32px rgba(255,90,54,.55);}
.btn-x--primary:active{transform:translateY(1px);box-shadow:0 0 12px rgba(255,90,54,.35);}
.btn-x--ghost{border-color:rgba(43,224,176,.55);color:var(--brand);}
.btn-x--ghost:hover{background:rgba(43,224,176,.12);color:var(--brand);transform:translateY(-2px);}
.btn-x--sm{padding:10px 18px;font-size:14px;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--brand);border-bottom:1px solid rgba(43,224,176,.4);padding-bottom:2px;
}
.link-arrow i,.link-arrow svg{transition:transform .2s ease-out;}
.link-arrow:hover{border-color:var(--brand);}
.link-arrow:hover i,.link-arrow:hover svg{transform:translateX(4px);}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,13,20,.72);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s ease-out;
}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(0,0,0,.45);}
.header-inner{
  display:flex;align-items:center;gap:var(--sp-4);
  height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  color:var(--brand);
  background:rgba(43,224,176,.1);
  border:1px solid rgba(43,224,176,.3);
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--text-1);}
.brand:hover .brand-text{color:var(--brand);}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:32px;}
.main-nav a{
  position:relative;display:inline-block;
  font-size:14px;color:var(--text-2);padding:6px 0;
}
.main-nav a:hover{color:var(--text-1);}
.main-nav a.is-active{color:var(--text-1);}
.main-nav a.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--brand);
}
.main-nav a.is-active::after{
  content:"";position:absolute;left:0;bottom:-2px;width:100%;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-cta{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  cursor:pointer;position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;width:20px;height:1.5px;background:var(--text-1);
  transition:transform .22s ease-out,opacity .22s ease-out;
}
.nav-toggle span:nth-child(1){top:16px;}
.nav-toggle span:nth-child(2){top:24px;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(4px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){transform:translateY(-4px) rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,9,14,.72);
  opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s ease-out;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(86vw,340px);
  background:var(--bg-800);border-left:1px solid var(--line-strong);
  transform:translateX(102%);transition:transform .26s ease-out;
  z-index:80;padding:26px 24px;display:flex;flex-direction:column;gap:var(--sp-3);
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line-strong);
  background:transparent;color:var(--text-2);cursor:pointer;font-size:18px;line-height:1;
}
.drawer ul{display:flex;flex-direction:column;gap:4px;}
.drawer ul a{
  display:block;padding:14px 4px;font-size:18px;color:var(--text-1);
  border-bottom:1px solid var(--line);
}
.drawer ul a.is-active{color:var(--brand);}

/* ---------- Banner ---------- */
.banner{
  position:relative;overflow:hidden;
  min-height:300px;display:flex;align-items:flex-end;
  border-bottom:1px solid var(--line);
}
.banner__bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  transform:scale(1.02);
}
.banner__mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,13,20,.72) 0%,rgba(6,13,20,.86) 55%,rgba(6,13,20,.97) 100%);
}
.banner__grid{
  position:absolute;inset:0;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:48px 48px;
}
.banner__inner{position:relative;padding:var(--sp-8) 0 var(--sp-6);width:100%;}
.breadcrumb-nav{font-size:13px;color:var(--text-3);margin-bottom:var(--sp-3);}
.breadcrumb-nav ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb-nav li{display:flex;align-items:center;gap:8px;}
.breadcrumb-nav li + li::before{content:"/";color:var(--text-3);}
.breadcrumb-nav a{color:var(--text-2);}
.breadcrumb-nav .current{color:var(--text-1);}
.banner h1{max-width:20ch;}
.banner .lead{margin-top:var(--sp-2);max-width:64ch;}
.banner__badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--sp-3);}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--brand);
  background:rgba(43,224,176,.1);
  border:1px solid rgba(43,224,176,.24);
  border-radius:999px;padding:5px 12px;
}
.chip--muted{color:var(--text-2);background:rgba(255,255,255,.04);border-color:var(--line-strong);}

/* ---------- Stats bar ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-800);
}
.stats__item{padding:26px 24px;border-right:1px solid var(--line);}
.stats__item:last-child{border-right:none;}
.stats__num{font-family:var(--font-mono);font-size:30px;font-weight:600;color:var(--text-1);line-height:1.1;}
.stats__num em{font-style:normal;font-size:15px;color:var(--brand);margin-left:4px;}
.stats__label{font-size:13px;color:var(--text-3);margin-top:6px;}

/* ---------- Split blocks ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-6);align-items:center;
}
.split + .split{margin-top:var(--sp-8);}
.split__media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line-strong);box-shadow:var(--shadow-card);
  aspect-ratio:4/3;
}
.split__media img{width:100%;height:100%;object-fit:cover;}
.split__media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,13,20,0) 40%,rgba(6,13,20,.6) 100%);
}
.split__tag{
  position:absolute;left:16px;bottom:16px;z-index:2;
  font-size:12px;letter-spacing:.12em;color:var(--brand);
  background:rgba(6,13,20,.72);border:1px solid rgba(43,224,176,.3);
  border-radius:999px;padding:5px 12px;
}
.split__body p{color:var(--text-2);font-size:16px;max-width:60ch;}
.split__body h3{margin-bottom:var(--sp-2);}
.split__body .eyebrow{margin-bottom:12px;}
.split--reverse .split__media{order:2;}
.split--reverse .split__body{order:1;}

.panel{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  padding:var(--sp-4);
}

/* ---------- Numbered list ---------- */
.num-list{border-top:1px solid var(--line);margin-top:var(--sp-3);}
.num-list li{
  display:grid;grid-template-columns:64px 1fr;gap:var(--sp-2);
  padding:22px 0;border-bottom:1px solid var(--line);
}
.num-list .n{
  font-family:var(--font-mono);font-size:22px;font-weight:600;color:var(--brand);
  line-height:1.2;opacity:.9;
}
.num-list h3{font-size:17px;margin-bottom:6px;}
.num-list p{font-size:15px;color:var(--text-2);margin:0;}

/* ---------- Steps ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:var(--sp-4);
}
.step{
  position:relative;padding:26px 22px;
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.step + .step{margin-left:18px;}
.step + .step::before{
  content:"";position:absolute;left:-19px;top:50%;width:18px;
  border-top:1px dashed rgba(255,255,255,.18);
}
.step:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.35);box-shadow:var(--shadow-card),var(--glow-brand);}
.step__n{
  font-family:var(--font-mono);font-size:26px;font-weight:600;
  color:rgba(43,224,176,.75);line-height:1;margin-bottom:14px;
}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--text-2);margin:0;}

/* ---------- FAQ ---------- */
.faq{margin-top:var(--sp-4);border-top:1px solid var(--line);}
.faq .accordion-item{
  background:transparent;border:none;border-bottom:1px solid var(--line);
}
.faq .accordion-button{
  background:transparent;color:var(--text-1);
  font-size:17px;font-weight:600;line-height:1.5;
  padding:22px 44px 22px 0;box-shadow:none;border-radius:0;
  position:relative;
}
.faq .accordion-button:not(.collapsed){color:var(--text-1);background:transparent;box-shadow:none;}
.faq .accordion-button:focus{box-shadow:none;border-color:transparent;}
.faq .accordion-button::after{
  content:"";position:absolute;right:6px;
  width:14px;height:14px;background:none;
  border-right:1.5px solid var(--text-2);border-bottom:1.5px solid var(--text-2);
  transform:rotate(45deg);transition:transform .24s ease-out,border-color .24s ease-out;
}
.faq .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);border-color:var(--brand);
}
.faq .accordion-button::before{
  content:"";position:absolute;left:-24px;top:22px;bottom:22px;width:2px;
  background:var(--brand);opacity:0;transition:opacity .24s ease-out;
}
.faq .accordion-button:not(.collapsed)::before{opacity:1;}
.faq .accordion-body{
  padding:0 40px 24px 0;font-size:15px;line-height:1.8;color:var(--text-2);
  max-width:78ch;
}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--bg-800);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 260px at 20% 50%,rgba(43,224,176,.12),transparent 70%);
}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.35;
  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:44px 44px;
}
.cta-band__inner{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);
  padding:var(--sp-8) 0;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);}
.cta-band p{color:var(--text-2);margin:10px 0 0;max-width:56ch;font-size:15px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cta-note{
  position:relative;z-index:2;
  font-size:13px;color:var(--text-3);
  padding-bottom:26px;
}

/* ---------- Category links ---------- */
.cat-links{display:flex;flex-wrap:wrap;gap:18px;margin-top:var(--sp-4);}
.cat-card{
  flex:1 1 300px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 24px;border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.35);box-shadow:var(--shadow-card),var(--glow-brand);color:var(--text-1);}
.cat-card strong{display:block;font-size:17px;font-weight:600;margin-bottom:6px;color:var(--text-1);}
.cat-card span{font-size:14px;color:var(--text-2);}
.cat-card i{color:var(--brand);font-size:18px;}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--bg-900);
  border-top:1px solid var(--line);
  padding-top:var(--sp-8);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:var(--sp-6);
  padding-bottom:var(--sp-6);
}
.footer-brand p{
  font-size:14px;color:var(--text-3);margin-top:16px;max-width:38ch;line-height:1.75;
}
.footer-col h4{
  font-size:13px;letter-spacing:.12em;color:var(--text-3);
  text-transform:uppercase;margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--brand);}
.with-icon{display:inline-flex;align-items:center;gap:8px;}
.with-icon svg{flex-shrink:0;opacity:.85;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);
  padding:20px 0 26px;font-size:13px;color:var(--text-3);
}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .steps{grid-template-columns:repeat(2,1fr);gap:18px;}
  .step + .step{margin-left:0;}
  .step + .step::before{display:none;}
}
@media (max-width:991px){
  .main-nav{display:none;}
  .header-cta .btn-x{display:none;}
  .nav-toggle{display:block;}
  .section{padding:var(--sp-8) 0;}
  .split{grid-template-columns:1fr;gap:var(--sp-4);}
  .split--reverse .split__media{order:1;}
  .split--reverse .split__body{order:2;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .stats__item:nth-child(2){border-right:none;}
  .stats__item:nth-child(1),.stats__item:nth-child(2){border-bottom:1px solid var(--line);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-4);}
  .banner{min-height:260px;}
}
@media (max-width:767px){
  .wrap{padding:0 18px;}
  .banner__inner{padding:var(--sp-6) 0 var(--sp-4);}
  .banner h1{max-width:none;}
  .banner__grid,.split__media::after{opacity:.6;}
  .steps{grid-template-columns:1fr;}
  .num-list li{grid-template-columns:52px 1fr;}
  .cta-band__inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn-x{flex:1 1 100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:520px){
  body{font-size:15px;}
  .stats{grid-template-columns:1fr;}
  .stats__item{border-right:none;border-bottom:1px solid var(--line);}
  .stats__item:last-child{border-bottom:none;}
  .panel{padding:20px;}
  .faq .accordion-button{padding-right:36px;font-size:16px;}
  .faq .accordion-button::before{left:-18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  .step:hover,.cat-card:hover,.btn-x:hover{transform:none;}
}

/* roulang page: article */
:root{
  --bg-900:#060D14;
  --bg-800:#0B1520;
  --bg-700:#101E2B;
  --glass:rgba(18,32,45,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --text-1:#EAF2F7;
  --text-2:#9FB2C0;
  --text-3:#6C8091;
  --brand:#2BE0B0;
  --brand-deep:#0E7C68;
  --accent:#FF5A36;
  --grad-cta:linear-gradient(135deg,#FF7A45,#FF4A22);
  --glow-brand:0 0 0 1px rgba(43,224,176,.35),0 8px 32px rgba(43,224,176,.22);
  --radius-card:18px;
  --radius-btn:12px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.04),0 12px 40px rgba(0,0,0,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{list-style:none;padding:0;}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease),transform .2s var(--ease);}
a:hover{color:var(--brand);}
button,input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(43,224,176,.28);color:#fff;}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.wrap{max-width:1280px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,13,20,.72);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .24s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(0,0,0,.45);}
.nav-wrap{display:flex;align-items:center;gap:24px;height:68px;transition:height .24s var(--ease);}
.site-header.is-scrolled .nav-wrap{height:60px;}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:-.01em;color:var(--text-1);white-space:nowrap;}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:34px;height:34px;flex:none;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(43,224,176,.18),rgba(43,224,176,.04));
  border:1px solid rgba(43,224,176,.35);color:var(--brand);
}
.main-nav{margin-left:auto;}
.main-nav ul{display:flex;align-items:center;gap:32px;}
.main-nav a{position:relative;display:inline-block;padding:6px 0;font-size:14px;color:var(--text-2);}
.main-nav a:hover{color:var(--text-1);}
.main-nav a.is-active{color:var(--text-1);}
.main-nav a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--brand);border-radius:2px;}
.main-nav a.is-active::before{content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);width:4px;height:4px;border-radius:50%;background:var(--brand);}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;position:relative;
  border:1px solid var(--line-strong);background:transparent;cursor:pointer;
  transition:border-color .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(43,224,176,.5);}
.nav-toggle span{position:absolute;left:11px;right:11px;height:1.5px;background:var(--text-1);border-radius:2px;transition:transform .24s var(--ease);}
.nav-toggle span:nth-child(1){top:17px;}
.nav-toggle span:nth-child(2){top:23px;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(3px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){transform:translateY(-3px) rotate(-45deg);}
.nav-mask{position:fixed;inset:0;z-index:85;background:rgba(3,8,12,.62);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);}
[hidden]{display:none !important;}

/* ============ 按钮 ============ */
.btn-cta,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);font-weight:600;cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.btn-cta{
  padding:13px 26px;font-size:15px;color:#fff;border:0;
  background:var(--grad-cta);box-shadow:0 8px 24px rgba(255,74,34,.28);
}
.btn-cta:hover{color:#fff;filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,74,34,.45);}
.btn-cta:active{transform:translateY(0);box-shadow:0 6px 18px rgba(255,74,34,.3);}
.btn-line{padding:12px 24px;font-size:15px;color:var(--brand);background:transparent;border:1px solid rgba(43,224,176,.5);}
.btn-line:hover{color:var(--brand);background:rgba(43,224,176,.12);border-color:var(--brand);transform:translateY(-2px);}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:10px;}

.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--text-2);
  padding-bottom:2px;border-bottom:1px solid rgba(255,255,255,.25);
}
.text-link:hover{color:var(--brand);border-color:var(--brand);}

/* ============ 文章头部 ============ */
.article-head{
  padding:52px 0 36px;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 380px at 10% -20%,rgba(43,224,176,.10),transparent 62%),
    radial-gradient(600px 300px at 92% 0%,rgba(255,90,54,.07),transparent 60%),
    var(--bg-900);
}
.breadcrumb-nav{font-size:13px;color:var(--text-3);margin-bottom:22px;}
.breadcrumb-nav ol{display:flex;flex-wrap:wrap;align-items:center;gap:0;}
.breadcrumb-nav li{display:flex;align-items:center;min-width:0;}
.breadcrumb-nav li+li::before{content:"/";padding:0 10px;color:rgba(255,255,255,.18);}
.breadcrumb-nav a{color:var(--text-3);}
.breadcrumb-nav a:hover{color:var(--brand);}
.breadcrumb-nav [aria-current]{color:var(--text-2);max-width:36ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-head h1{
  font-size:clamp(28px,4vw,44px);
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.01em;
  max-width:900px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:13px;color:var(--text-3);}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 13px;
  font-size:12.5px;border-radius:999px;
  background:rgba(43,224,176,.10);color:var(--brand);
  border:1px solid rgba(43,224,176,.26);
}
.meta-dot{width:3px;height:3px;border-radius:50%;background:var(--text-3);}

/* ============ 正文 ============ */
.article-main{padding:56px 0 0;}
.article-body{max-width:800px;margin:0 auto;}
.article-content{font-size:17px;line-height:1.9;color:#CFDDE7;}
.article-content p{margin:0 0 1.4em;}
.article-content h2{
  position:relative;font-size:clamp(20px,2.2vw,24px);line-height:1.4;font-weight:650;
  color:var(--text-1);margin:2.2em 0 .9em;padding-left:15px;letter-spacing:-.01em;
}
.article-content h2::before{content:"";position:absolute;left:0;top:.26em;width:3px;height:1em;background:var(--brand);border-radius:2px;}
.article-content h3{font-size:18px;line-height:1.5;font-weight:600;color:var(--text-1);margin:1.9em 0 .7em;}
.article-content h4{font-size:16.5px;font-weight:600;color:var(--text-1);margin:1.6em 0 .6em;}
.article-content ul{margin:0 0 1.4em;}
.article-content ul>li{position:relative;padding-left:20px;margin:.45em 0;}
.article-content ul>li::before{content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--brand);}
.article-content ol{counter-reset:li;margin:0 0 1.4em;}
.article-content ol>li{position:relative;padding-left:36px;margin:.5em 0;counter-increment:li;}
.article-content ol>li::before{
  content:counter(li,decimal-leading-zero);position:absolute;left:0;top:0;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;font-weight:600;color:var(--brand);line-height:2.2;
}
.article-content blockquote{
  margin:0 0 1.6em;padding:18px 22px;
  border-left:3px solid var(--brand);border-radius:0 12px 12px 0;
  background:rgba(43,224,176,.06);color:var(--text-2);
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content img{border-radius:12px;margin:1.4em 0;width:100%;}
.article-content figure{margin:1.4em 0;}
.article-content figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;}
.article-content a{color:var(--brand);border-bottom:1px solid rgba(43,224,176,.4);}
.article-content a:hover{border-color:var(--brand);}
.article-content table{width:100%;border-collapse:collapse;margin:0 0 1.6em;font-size:15px;}
.article-content th,.article-content td{border:1px solid var(--line);padding:11px 14px;text-align:left;}
.article-content th{background:rgba(255,255,255,.03);color:var(--text-1);font-weight:600;}
.article-content code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;background:rgba(255,255,255,.06);
  padding:2px 6px;border-radius:6px;color:#A9E9D6;
}
.article-content pre{
  background:var(--bg-700);border:1px solid var(--line);border-radius:12px;
  padding:18px;overflow-x:auto;margin:0 0 1.6em;
}
.article-content pre code{background:none;padding:0;}
.article-content hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}

.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:72px 24px;text-align:center;
  background:var(--bg-700);border:1px solid var(--line);border-radius:var(--radius-card);
}
.empty-state svg{color:var(--text-3);}
.empty-state p{font-size:15px;color:var(--text-2);}

.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:48px;padding-top:26px;border-top:1px solid var(--line);}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;font-size:13px;
  border-radius:999px;border:1px solid var(--line-strong);color:var(--text-2);
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
a.tag:hover{border-color:rgba(43,224,176,.55);color:var(--brand);background:rgba(43,224,176,.08);}
.article-back{display:flex;flex-wrap:wrap;gap:28px;margin-top:30px;}

/* ============ 通用板块 ============ */
.section{padding:78px 0 0;}
.section-head{margin-bottom:34px;max-width:720px;}
.section-eyebrow{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;color:var(--brand);
}
.section-head h2{
  font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:650;
  letter-spacing:-.01em;margin-top:10px;
}
.section-head p{margin-top:12px;font-size:15px;color:var(--text-2);line-height:1.75;}

/* 核对清单 */
.check-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.check-item{
  display:flex;gap:14px;padding:20px;
  background:var(--bg-700);border:1px solid var(--line);border-radius:14px;
  transition:border-color .24s var(--ease),transform .24s var(--ease);
}
.check-item:hover{border-color:rgba(43,224,176,.32);transform:translateY(-3px);}
.check-num{
  flex:none;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:15px;font-weight:600;color:var(--brand);font-variant-numeric:tabular-nums;
}
.check-item h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.check-item p{font-size:14px;color:var(--text-2);line-height:1.7;}

/* FAQ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 48px 20px 20px;font-size:16.5px;font-weight:600;color:var(--text-1);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--brand);}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:26px;width:2px;height:0;
  background:var(--brand);transition:height .24s var(--ease),top .24s var(--ease);
}
.faq-item[open] summary::before{height:20px;top:22px;}
.faq-item summary::after{
  content:"+";position:absolute;right:10px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--text-3);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);color:var(--brand);}
.faq-answer{padding:0 48px 22px 20px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* 相关栏目卡片 */
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.related-card{
  display:block;overflow:hidden;
  background:var(--glass);-webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.related-card:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.35);color:inherit;}
.related-card .thumb{aspect-ratio:16/9;overflow:hidden;position:relative;}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease);}
.related-card:hover .thumb img{transform:scale(1.03);}
.related-card .thumb::after{content:"";position:absolute;inset:auto 0 0 0;height:64px;background:linear-gradient(to top,rgba(6,13,20,.85),transparent);}
.related-card .body{padding:20px;}
.related-card .body .tag{margin-bottom:12px;}
.related-card h3{font-size:18px;font-weight:600;line-height:1.45;color:var(--text-1);}
.related-card p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.7;}

/* CTA */
.cta-band{
  margin-top:80px;padding:74px 0;
  border-top:1px solid var(--line);
  background:
    radial-gradient(700px 280px at 12% 0%,rgba(43,224,176,.13),transparent 68%),
    radial-gradient(500px 260px at 88% 100%,rgba(255,90,54,.10),transparent 65%),
    var(--bg-800);
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:650;letter-spacing:-.01em;max-width:22ch;}
.cta-band .cta-desc{margin-top:14px;font-size:15px;color:var(--text-2);line-height:1.8;max-width:52ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.cta-note{margin-top:22px;font-size:13px;color:var(--text-3);}

/* ============ 页脚 ============ */
.site-footer{margin-top:80px;background:var(--bg-800);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.8;max-width:36ch;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a,.footer-col span{font-size:13.5px;color:var(--text-2);line-height:1.6;}
.with-icon{display:inline-flex;align-items:flex-start;gap:8px;}
.with-icon svg{flex:none;margin-top:3px;color:var(--text-3);transition:color .2s var(--ease);}
.footer-col a:hover .with-icon svg,.footer-col a.with-icon:hover svg{color:var(--brand);}
.footer-bottom{
  margin-top:52px;padding:22px 0;border-top:1px solid var(--line);
  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){
  .check-list{grid-template-columns:repeat(3,1fr);gap:16px;}
}
@media (max-width:991px){
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);z-index:90;
    margin-left:0;padding:96px 28px 32px;
    background:var(--bg-700);border-left:1px solid var(--line-strong);
    transform:translateX(100%);
    transition:transform .28s var(--ease);
    overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0);}
  .main-nav ul{flex-direction:column;align-items:flex-start;gap:24px;}
  .main-nav a{font-size:20px;color:var(--text-1);font-weight:500;}
  .main-nav a.is-active::before{left:-14px;}
  .nav-toggle{display:block;margin-left:auto;}
  .nav-actions{margin-left:auto;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
  .check-list{grid-template-columns:1fr;gap:14px;}
  .section{padding:60px 0 0;}
}
@media (max-width:767px){
  .wrap{padding:0 18px;}
  .nav-wrap{height:56px;}
  .site-header.is-scrolled .nav-wrap{height:56px;}
  .nav-actions .btn-cta{display:none;}
  .article-head{padding:36px 0 28px;}
  .article-main{padding:40px 0 0;}
  .article-content{font-size:16px;line-height:1.85;}
  .article-content h2{margin-top:1.9em;}
  .related-grid{grid-template-columns:1fr;}
  .related-card .thumb{aspect-ratio:16/9;}
  .cta-band{margin-top:60px;padding:56px 0;}
  .cta-actions .btn-cta,.cta-actions .btn-line{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .section{padding:48px 0 0;}
  .faq-item summary{padding:18px 40px 18px 16px;font-size:15.5px;}
  .faq-answer{padding:0 16px 20px 16px;font-size:14.5px;}
}
@media (max-width:520px){
  body{font-size:15px;}
  .brand-text{font-size:15px;}
  .article-head h1{font-size:26px;}
  .breadcrumb-nav [aria-current]{max-width:22ch;}
  .btn-cta,.btn-line{padding:12px 20px;font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg-900:#060D14;
  --bg-800:#0B1520;
  --bg-700:#101E2B;
  --glass:rgba(18,32,45,.55);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --text-1:#EAF2F7;
  --text-2:#9FB2C0;
  --text-3:#6C8091;
  --brand:#2BE0B0;
  --brand-deep:#0E7C68;
  --accent:#FF5A36;
  --grad-cta:linear-gradient(135deg,#FF7A45,#FF4A22);
  --glow-brand:0 0 0 1px rgba(43,224,176,.35),0 8px 32px rgba(43,224,176,.22);
  --glow-accent:0 0 24px rgba(255,90,54,.45);
  --radius-card:18px;
  --radius-btn:12px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.04),0 12px 40px rgba(0,0,0,.45);
  --shadow-hover:0 20px 52px rgba(0,0,0,.55);
  --section-y:96px;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-1);
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 0%,transparent 78%);
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,.accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
h1,h2,h3,h4{margin:0;letter-spacing:-.01em;color:var(--text-1)}
h1{font-size:clamp(30px,4.2vw,52px);line-height:1.18;font-weight:700}
h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25;font-weight:650}
h3{font-size:20px;line-height:1.4;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 24px;border-radius:var(--radius-btn);
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease-out,box-shadow .2s ease-out,background-color .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.btn-primary{background:var(--grad-cta);color:#fff;box-shadow:0 10px 28px rgba(255,74,34,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(255,74,34,.4),var(--glow-accent)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(255,74,34,.3)}
.btn-ghost{background:transparent;color:var(--brand);border-color:rgba(43,224,176,.55)}
.btn-ghost:hover{background:rgba(43,224,176,.12);border-color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand);border-bottom:1px solid rgba(43,224,176,.45);padding-bottom:2px;transition:border-color .2s ease-out,color .2s}
.link-more:hover{border-color:var(--brand);color:#7CF0D3}
.link-more:hover svg{transform:translateX(3px)}
.link-more svg{transition:transform .2s ease-out}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(6,13,20,.72);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease-out;
}
.site-header.is-scrolled{box-shadow:0 14px 36px rgba(0,0,0,.5)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px;transition:height .22s ease-out}
.site-header.is-scrolled .header-inner{height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:600;font-size:16px;letter-spacing:-.01em;white-space:nowrap}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;border:1px solid rgba(43,224,176,.35);background:rgba(43,224,176,.08);color:var(--brand);flex:0 0 auto}
.main-nav ul{display:flex;align-items:center;gap:32px}
.main-nav a{position:relative;display:inline-block;font-size:14px;color:var(--text-2);padding:6px 0;transition:color .2s ease-out}
.main-nav a:hover{color:var(--text-1)}
.main-nav a.is-active{color:var(--text-1)}
.main-nav a.is-active::after{content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;border-radius:2px;background:var(--brand)}
.main-nav a.is-active::before{content:"";position:absolute;left:-13px;top:50%;width:4px;height:4px;border-radius:50%;background:var(--brand);transform:translateY(-50%)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  position:relative;cursor:pointer;
}
.nav-toggle span{position:absolute;left:12px;right:12px;height:1.5px;background:var(--text-1);border-radius:2px;transition:transform .22s ease-out,opacity .22s}
.nav-toggle span:nth-child(1){top:17px}
.nav-toggle span:nth-child(2){top:24px}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(3.5px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){transform:translateY(-3.5px) rotate(-45deg)}
body.nav-open::after{content:"";position:fixed;inset:0;background:rgba(3,7,11,.62);z-index:1035}

/* ============ 页面头部 ============ */
.page-head{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.page-head-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  filter:saturate(.85);
}
.page-head-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,13,20,.86) 0%,rgba(6,13,20,.9) 55%,rgba(6,13,20,.98) 100%);
}
.page-head-inner{position:relative;padding:92px 0 76px;min-height:300px;display:flex;flex-direction:column;justify-content:center}
.breadcrumb-nav{margin-bottom:22px}
.breadcrumb-nav ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.breadcrumb-nav li{display:flex;align-items:center;gap:10px}
.breadcrumb-nav li+li::before{content:"/";color:rgba(255,255,255,.22)}
.breadcrumb-nav a{color:var(--text-2);transition:color .2s}
.breadcrumb-nav a:hover{color:var(--brand)}
.breadcrumb-nav [aria-current="page"]{color:var(--text-1)}
.page-head h1{max-width:16em}
.page-head-sub{max-width:62ch;margin-top:20px;font-size:17px;color:var(--text-2);line-height:1.8}
.page-head-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.page-head-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--brand);
  background:rgba(43,224,176,.08);
  border:1px solid rgba(43,224,176,.25);
  padding:5px 12px;border-radius:999px;
}

/* ============ 板块 ============ */
.section{padding:var(--section-y) 0}
.section-alt{background:var(--bg-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;text-transform:uppercase;letter-spacing:.12em;
  color:var(--text-3);margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--brand)}

/* ============ 卡片 ============ */
.card{
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  height:100%;
  display:flex;flex-direction:column;
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.card:hover{transform:translateY(-4px);border-color:rgba(43,224,176,.35);box-shadow:var(--shadow-hover)}
.card-media{position:relative;overflow:hidden;aspect-ratio:4/3;background:var(--bg-700)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-media::after{content:"";position:absolute;inset:auto 0 0 0;height:56px;background:linear-gradient(180deg,transparent,rgba(6,13,20,.75))}
.card-body{padding:24px;display:flex;flex-direction:column;gap:14px;flex:1}
.card-body h3{font-size:18px}
.card-body p{color:var(--text-2);font-size:14.5px;line-height:1.75}
.badge-soft{
  align-self:flex-start;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--brand);background:rgba(43,224,176,.1);
  border:1px solid rgba(43,224,176,.22);
  padding:4px 11px;border-radius:999px;
}
.card-feature .card-media{aspect-ratio:16/9}
.card-feature .card-body{padding:32px}
.card-feature .card-body h3{font-size:24px}
.card-feature .card-body p{font-size:15.5px}
.tick-list{display:flex;flex-direction:column;gap:10px;margin-top:6px}
.tick-list li{display:flex;gap:10px;font-size:14px;color:var(--text-2);line-height:1.7}
.tick-list svg{flex:0 0 auto;margin-top:5px;color:var(--brand)}
.card-mini .card-body{padding:22px}

/* ============ 步骤条 / 时间线 ============ */
.timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:24px;padding-top:12px}
.timeline::before{content:"";position:absolute;top:30px;left:12px;right:12px;height:1px;background:var(--line-strong)}
.step{position:relative;padding-top:56px}
.step-num{
  position:absolute;top:0;left:0;
  width:56px;height:56px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:18px;font-weight:600;
  color:var(--brand);background:rgba(43,224,176,.09);
  border:1px solid rgba(43,224,176,.25);
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{color:var(--text-2);font-size:14px;line-height:1.75}

/* ============ 数据条 ============ */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--bg-700);overflow:hidden;
}
.stat{padding:28px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat-num{font-family:var(--mono);font-size:32px;font-weight:600;color:var(--text-1);font-variant-numeric:tabular-nums;line-height:1.1}
.stat-num small{font-size:14px;color:var(--text-2);margin-left:4px;font-family:inherit}
.stat-label{margin-top:8px;font-size:13px;color:var(--text-3)}

/* ============ 编号列表 ============ */
.num-list{margin-top:12px}
.num-list li{
  display:flex;gap:20px;
  padding:22px 0;
  border-top:1px solid var(--line);
}
.num-list li:last-child{border-bottom:1px solid var(--line)}
.num-list .idx{font-family:var(--mono);font-size:15px;color:var(--brand);flex:0 0 42px;padding-top:2px}
.num-list h3{font-size:17px;margin-bottom:6px}
.num-list p{color:var(--text-2);font-size:14.5px;line-height:1.75}

/* ============ FAQ ============ */
.faq .accordion-item{background:transparent;border:none;border-top:1px solid var(--line)}
.faq .accordion-item:last-child{border-bottom:1px solid var(--line)}
.faq .accordion-button{
  position:relative;
  background:transparent;color:var(--text-1);
  font-size:17px;font-weight:600;line-height:1.6;
  padding:22px 56px 22px 4px;
  border-radius:0;box-shadow:none;
  transition:background-color .2s ease-out,color .2s ease-out,padding-left .2s ease-out;
}
.faq .accordion-button:not(.collapsed){
  background:transparent;color:var(--text-1);
  box-shadow:inset 2px 0 0 0 var(--brand);
  padding-left:18px;
}
.faq .accordion-button:hover{color:#fff}
.faq .accordion-button::before,
.faq .accordion-button::after{
  content:"";position:absolute;right:20px;top:calc(50% - 1px);
  width:14px;height:1.5px;background:var(--text-2);border-radius:2px;
  background-image:none;transition:transform .22s ease-out,background-color .22s ease-out;
}
.faq .accordion-button::before{transform:rotate(90deg)}
.faq .accordion-button::after{transform:rotate(0)}
.faq .accordion-button:not(.collapsed)::before{transform:rotate(45deg);background:var(--brand)}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(-45deg);background:var(--brand)}
.faq .accordion-body{padding:0 56px 26px 18px;color:var(--text-2);font-size:15px;line-height:1.85}
.faq .accordion-body p+p{margin-top:10px}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);
  background:
    radial-gradient(720px 320px at 18% 10%,rgba(43,224,176,.12),transparent 68%),
    radial-gradient(520px 300px at 85% 90%,rgba(255,90,54,.08),transparent 70%),
    var(--bg-800);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:52px 52px;
  pointer-events:none;
}
.cta-inner{position:relative;padding:76px 0;display:flex;flex-wrap:wrap;gap:32px;align-items:center;justify-content:space-between}
.cta-copy{max-width:60ch}
.cta-copy h2{margin-bottom:14px}
.cta-copy p{color:var(--text-2);font-size:16px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-note{margin-top:34px;font-size:13px;color:var(--text-3);position:relative}
.pill-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;position:relative}
.pill-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;color:var(--text-2);
  border:1px solid var(--line-strong);border-radius:999px;
  padding:8px 16px;
  transition:color .2s ease-out,border-color .2s ease-out,background-color .2s ease-out;
}
.pill-link:hover{color:var(--brand);border-color:rgba(43,224,176,.5);background:rgba(43,224,176,.07)}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-900);border-top:1px solid var(--line);padding:64px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand p{margin-top:16px;color:var(--text-2);font-size:14px;line-height:1.8;max-width:34ch}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:18px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:var(--text-2);transition:color .2s ease-out}
.footer-col a:hover{color:var(--brand)}
.with-icon{display:inline-flex;align-items:flex-start;gap:8px;line-height:1.6}
.with-icon svg{flex:0 0 auto;margin-top:4px}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (min-width:1400px){
  .wrap{max-width:1280px}
}
@media (max-width:1199.98px){
  :root{--section-y:80px}
  .timeline{grid-template-columns:repeat(3,1fr)}
  .timeline::before{display:none}
  .step{padding-top:0;padding-left:72px;min-height:56px}
  .step-num{top:0}
}
@media (max-width:991.98px){
  :root{--section-y:64px}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;
    width:min(340px,86vw);
    background:var(--bg-800);
    border-left:1px solid var(--line);
    padding:96px 28px 32px;
    transform:translateX(100%);
    transition:transform .24s ease-out;
    z-index:1040;
    overflow-y:auto;
  }
  body.nav-open .main-nav{transform:translateX(0)}
  .main-nav ul{flex-direction:column;align-items:flex-start;gap:6px}
  .main-nav a{font-size:20px;padding:12px 0;color:var(--text-1);opacity:.9}
  .main-nav a.is-active::after{bottom:6px}
  .main-nav a.is-active::before{left:-14px}
  .nav-toggle{display:block}
  .nav-actions .btn{display:none}
  .page-head-inner{padding:70px 0 58px;min-height:260px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .cta-inner{padding:64px 0}
}
@media (max-width:767.98px){
  :root{--section-y:48px}
  .wrap{padding:0 18px}
  .page-head-actions .btn{flex:1 1 100%}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .timeline{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr}
  .stat{border-right:none;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:none}
  .card-feature .card-body{padding:24px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:575.98px){
  .wrap{padding:0 16px}
  .page-head-sub{font-size:16px}
  .faq .accordion-button{font-size:16px;padding-right:48px}
  .faq .accordion-body{padding-right:24px}
  .brand-text{font-size:15px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .card:hover{transform:none}
  .btn:hover{transform:none}
}