/* roulang page: index */
:root{
  --bg:#0A0D0C;
  --bg-2:#101514;
  --card:#171D1C;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#EDF2F0;
  --muted:#A7B4B0;
  --weak:#6E7A77;
  --accent:#2FE39B;
  --accent-soft:rgba(47,227,155,.22);
  --accent-glow:rgba(47,227,155,.35);
  --amber:#FFC46B;
  --error:#FF6B6B;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --font-cn:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --pad:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:var(--accent-soft);color:#fff}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,227,155,.28);border-radius:8px}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1440px){
  .container{max-width:1280px}
}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:200;
  background:rgba(10,13,12,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:border-color .3s ease,background .3s ease;
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  opacity:0;
  transition:opacity .35s ease;
}
.site-header.is-scrolled::after{opacity:.9}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
  gap:20px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:750;
  font-size:16px;
  letter-spacing:.01em;
  white-space:nowrap;
}
.logo-mark{
  width:10px;height:10px;
  border-radius:3px;
  background:var(--accent);
  box-shadow:0 0 14px var(--accent-glow);
  flex:none;
}
.logo-text{color:var(--text)}
.logo-text b{color:var(--accent);font-weight:750}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:20px 12px;
  font-size:14px;
  color:var(--muted);
  letter-spacing:.02em;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;
  bottom:14px;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s ease;
  box-shadow:0 0 12px var(--accent-glow);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{
  color:var(--text);
  text-shadow:0 0 16px rgba(47,227,155,.45);
}
.nav-link.active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:38px;
  padding:0 18px;
  border-radius:var(--r-btn);
  background:var(--accent);
  color:#04150E;
  font-size:14px;
  font-weight:650;
  transition:filter .22s ease,box-shadow .22s ease,transform .18s ease;
}
.nav-cta:hover{filter:brightness(1.08);box-shadow:0 0 22px var(--accent-glow);color:#04150E}
.nav-cta:active{transform:translateY(1px)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  background:transparent;
  border:1px solid var(--line-2);
  border-radius:10px;
  cursor:pointer;
  position:relative;
}
.nav-toggle span{
  position:absolute;
  left:12px;right:12px;
  height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform .26s ease,opacity .26s ease;
}
.nav-toggle span:nth-child(1){top:17px}
.nav-toggle span:nth-child(2){bottom:17px}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){transform:translateY(-7px) rotate(-45deg)}

.drawer{
  position:fixed;
  inset:64px 0 0;
  background:var(--bg);
  z-index:190;
  padding:28px 24px 40px;
  transform:translateY(-12px);
  opacity:0;
  pointer-events:none;
  transition:opacity .26s ease,transform .26s ease;
  overflow-y:auto;
}
.drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto}
.drawer-group{margin-bottom:26px}
.drawer-label{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--weak);
  text-transform:uppercase;
  margin-bottom:10px;
}
.drawer-nav a{
  display:flex;
  align-items:center;
  gap:14px;
  padding:14px 0;
  font-size:20px;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.drawer-nav a i{
  font-style:normal;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--accent);
  letter-spacing:.08em;
}
.drawer-nav a:hover{color:var(--accent)}
.drawer-sub a{
  display:block;
  padding:12px 0;
  font-size:16px;
  color:var(--muted);
  border-bottom:1px solid var(--line);
}
.drawer-sub a:hover{color:var(--text)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding-top:64px;
  overflow:hidden;
  background-image:linear-gradient(180deg,rgba(10,13,12,.86) 0%,rgba(10,13,12,.92) 55%,var(--bg) 100%),url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 80px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 80px);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
  padding:104px 0 96px;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--accent);
  border:1px solid rgba(47,227,155,.32);
  border-radius:var(--r-pill);
  padding:6px 14px;
  margin-bottom:24px;
}
.hero-eyebrow i{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent-glow);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{
  font-size:clamp(36px,5.2vw,68px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.01em;
  margin-bottom:20px;
}
.hero h1 em{
  font-style:normal;
  color:var(--accent);
  text-shadow:0 0 28px rgba(47,227,155,.32);
}
.hero-sub{
  font-size:17px;
  color:var(--muted);
  max-width:34em;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--muted);
  border:1px solid var(--line-2);
  border-radius:var(--r-pill);
  padding:6px 14px;
}
.chip b{color:var(--weak);font-weight:500}
.chip.is-accent{border-color:rgba(47,227,155,.32);color:var(--accent)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:14px 26px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:650;
  cursor:pointer;
  transition:filter .22s ease,box-shadow .22s ease,border-color .22s ease,color .22s ease,transform .18s ease,background .22s ease;
  background:transparent;
  color:var(--text);
}
.btn-primary{background:var(--accent);color:#04150E}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 26px var(--accent-glow);color:#04150E}
.btn-ghost{border-color:var(--line-2);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:#fff;background:rgba(47,227,155,.05)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{box-shadow:0 0 0 3px rgba(47,227,155,.28)}
.btn-sm{min-height:40px;padding:10px 18px;font-size:14px}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  color:var(--accent);
  border-bottom:1px dashed rgba(47,227,155,.5);
  padding-bottom:2px;
}
.link-arrow i{transition:transform .22s ease}
.link-arrow:hover{border-bottom-style:solid;color:var(--accent)}
.link-arrow:hover i{transform:translateX(4px)}

/* ---------- 登录界面示意 ---------- */
.mock-wrap{position:relative}
.mock-wrap::after{
  content:"";
  position:absolute;
  inset:-14% -8% auto auto;
  width:60%;
  height:70%;
  background:radial-gradient(circle,rgba(47,227,155,.14),transparent 68%);
  pointer-events:none;
}
.login-mock{
  position:relative;
  background:linear-gradient(158deg,rgba(23,29,28,.97),rgba(10,13,12,.97));
  border:1px solid var(--line-2);
  border-radius:20px;
  padding:26px;
  box-shadow:0 26px 70px rgba(0,0,0,.62),inset 0 0 0 1px rgba(255,255,255,.02);
}
.mock-bar{
  display:flex;
  align-items:center;
  gap:8px;
  padding-bottom:18px;
  margin-bottom:20px;
  border-bottom:1px solid var(--line);
}
.mock-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.16)}
.mock-dot:nth-child(1){background:rgba(255,107,107,.6)}
.mock-dot:nth-child(2){background:rgba(255,196,107,.6)}
.mock-dot:nth-child(3){background:rgba(47,227,155,.6)}
.mock-status{
  margin-left:auto;
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--muted);
  letter-spacing:.06em;
}
.mock-status i{
  width:7px;height:7px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent-glow);
  animation:pulse 2.4s ease-in-out infinite;
}
.mock-field{margin-bottom:16px}
.mock-field label{
  display:block;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--weak);
  text-transform:uppercase;
  margin-bottom:8px;
}
.mock-input{
  display:flex;
  align-items:center;
  min-height:48px;
  padding:13px 16px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  color:var(--weak);
  font-size:15px;
  gap:4px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.mock-input.is-focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,227,155,.14)}
.caret{
  display:inline-block;
  width:2px;height:18px;
  background:var(--accent);
  box-shadow:0 0 8px var(--accent-glow);
  animation:blink 1s steps(1) infinite;
}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}
.mock-captcha{display:flex;gap:10px}
.mock-captcha span{
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  height:48px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:10px;
  font-family:var(--font-mono);
  font-size:19px;
  font-weight:600;
  color:var(--text);
  letter-spacing:.05em;
}
.mock-captcha span:nth-child(2){border-color:rgba(47,227,155,.34);color:var(--accent)}
.mock-btn{
  display:flex;
  align-items:center;
  justify-content:center;
  height:50px;
  margin-top:22px;
  border-radius:var(--r-btn);
  background:var(--accent);
  color:#04150E;
  font-size:15.5px;
  font-weight:700;
  letter-spacing:.04em;
  box-shadow:0 0 24px rgba(47,227,155,.22);
}
.mock-foot{
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.05em;
  color:var(--weak);
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
}
.mock-foot em{font-style:normal;color:rgba(255,107,107,.85)}

/* ---------- 通用板块 ---------- */
.section{padding:var(--pad) 0;position:relative}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:48px;
}
.section-head h2{
  font-size:clamp(26px,3.2vw,42px);
  font-weight:750;
  line-height:1.2;
  letter-spacing:-.005em;
  margin-bottom:12px;
}
.section-head p{color:var(--muted);font-size:16px;max-width:52ch}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:14px;
  display:block;
}
.h3{
  font-size:clamp(19px,1.8vw,24px);
  font-weight:650;
  line-height:1.35;
}
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  position:relative;
  transition:border-color .26s ease,transform .26s ease,background .26s ease;
}
.card:hover{
  transform:translateY(-4px);
  background:#1B2221;
  border-color:var(--line-2);
  box-shadow:0 18px 40px rgba(0,0,0,.45);
}
.card:hover::before{
  content:"";
  position:absolute;
  top:-1px;left:16px;right:16px;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  box-shadow:0 0 18px rgba(47,227,155,.22);
}
.num{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--accent);
  display:block;
  margin-bottom:18px;
}
.card h3{font-size:19px;font-weight:650;margin-bottom:12px;line-height:1.4}
.card p{color:var(--muted);font-size:15.5px;line-height:1.8}

/* ---------- 卖点 bento ---------- */
.sell-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:24px;
}
.sell-right{display:grid;gap:24px}
.sell-wide{grid-column:1 / -1}
.sell-wide-inner{
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:32px;
  align-items:center;
}
.sell-wide ul{display:grid;gap:12px}
.sell-wide li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15.5px;
  color:var(--muted);
}
.sell-wide li i{
  color:var(--accent);
  margin-top:6px;
  font-size:12px;
}
.bento-accent{
  background:linear-gradient(150deg,rgba(47,227,155,.09),rgba(23,29,28,.98) 46%);
}
.cat-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.cat-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--muted);
  border:1px solid var(--line-2);
  border-radius:var(--r-pill);
  padding:8px 16px;
  transition:border-color .22s ease,color .22s ease,background .22s ease;
}
.cat-pill:hover{color:var(--text);border-color:rgba(47,227,155,.45);background:rgba(47,227,155,.05)}
.cat-pill span{font-family:var(--font-mono);font-size:11.5px;color:var(--accent);letter-spacing:.1em}

/* ---------- 演示 ---------- */
.demo-grid{
  display:grid;
  grid-template-columns:266px 1fr;
  gap:32px;
  align-items:start;
}
.demo-tabs{display:flex;flex-direction:column;gap:8px}
.demo-tab{
  display:flex;
  gap:14px;
  align-items:flex-start;
  text-align:left;
  padding:18px 18px 18px 20px;
  background:transparent;
  border:1px solid transparent;
  border-left:2px solid var(--line-2);
  border-radius:0 var(--r-btn) var(--r-btn) 0;
  color:var(--muted);
  cursor:pointer;
  transition:background .22s ease,color .22s ease,border-color .22s ease;
  font-size:15px;
  line-height:1.6;
  min-height:44px;
}
.demo-tab b{display:block;color:var(--text);font-weight:650;margin-bottom:4px;font-size:15.5px}
.demo-tab em{
  font-style:normal;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--weak);
  flex:none;
  padding-top:3px;
  letter-spacing:.1em;
}
.demo-tab:hover{background:rgba(255,255,255,.03);color:var(--text)}
.demo-tab.is-active{
  background:linear-gradient(90deg,rgba(47,227,155,.10),transparent 78%);
  border-left-color:var(--accent);
  color:var(--text);
  box-shadow:inset 0 0 22px rgba(47,227,155,.08);
}
.demo-tab.is-active em{color:var(--accent)}
.device-frame{
  border:1px solid var(--line-2);
  border-radius:var(--r-card);
  background:var(--bg-2);
  padding:12px;
  box-shadow:0 24px 60px rgba(0,0,0,.5);
}
.device-bar{
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px 8px 14px;
}
.device-bar .mock-dot{width:7px;height:7px}
.device-url{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--weak);
  letter-spacing:.06em;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  padding:3px 12px;
}
.device-shot{
  position:relative;
  aspect-ratio:16/10;
  border-radius:10px;
  overflow:hidden;
  background:#0A0D0C;
}
.device-shot img{
  width:100%;height:100%;object-fit:cover;
  opacity:.92;
}
.device-shot::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,13,12,.1),rgba(10,13,12,.55));
}
.demo-caption{
  margin-top:18px;
  font-size:13.5px;
  color:var(--weak);
  font-family:var(--font-mono);
  letter-spacing:.04em;
}

/* ---------- 证据 ---------- */
.proof-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.proof-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  padding-bottom:16px;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.proof-track::-webkit-scrollbar{display:none}
.proof-card{
  flex:0 0 348px;
  scroll-snap-align:start;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  transition:border-color .26s ease,transform .26s ease;
}
.proof-card:hover{border-color:var(--line-2);transform:translateY(-4px)}
.proof-num{
  font-family:var(--font-mono);
  font-size:34px;
  font-weight:600;
  color:var(--accent);
  letter-spacing:-.01em;
  line-height:1;
  margin-bottom:14px;
  text-shadow:0 0 22px rgba(47,227,155,.24);
}
.proof-num span{font-size:15px;color:var(--muted);margin-left:6px;letter-spacing:.04em}
.proof-card p{color:var(--muted);font-size:15.5px}
.proof-source{
  margin-top:18px;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--weak);
}

/* ---------- 资讯 ---------- */
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.news-card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  display:flex;
  flex-direction:column;
  min-height:220px;
  transition:border-color .26s ease,transform .26s ease,background .26s ease;
}
.news-card:hover{transform:translateY(-4px);border-color:var(--line-2);background:#1B2221}
.news-card::after{
  content:"";
  position:absolute;
  top:16px;right:16px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent-glow);
}
.news-title{
  font-size:17.5px;
  font-weight:650;
  line-height:1.5;
  margin-bottom:12px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-title a:hover{color:var(--accent)}
.news-excerpt{
  color:var(--muted);
  font-size:14.8px;
  line-height:1.75;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:20px;
}
.news-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.badge{
  display:inline-flex;
  align-items:center;
  font-size:12.5px;
  letter-spacing:.04em;
  border:1px solid rgba(47,227,155,.34);
  color:var(--accent);
  border-radius:var(--r-pill);
  padding:3px 12px;
  white-space:nowrap;
}
.badge-amber{border-color:rgba(255,196,107,.4);color:var(--amber)}
.news-meta time{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--weak);
  letter-spacing:.04em;
}
.news-empty{
  grid-column:1 / -1;
  border:1px dashed var(--line-2);
  border-radius:var(--r-card);
  padding:56px 24px;
  text-align:center;
  color:var(--muted);
}
.news-empty i{
  display:block;
  font-size:22px;
  color:var(--weak);
  margin-bottom:14px;
}
.news-empty p{font-size:15px;margin-bottom:18px}
.news-all{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  color:var(--accent);
  white-space:nowrap;
}
.news-all:hover{color:#fff}
.news-all i{transition:transform .22s ease}
.news-all:hover i{transform:translateX(4px)}

/* ---------- 价格 ---------- */
.price-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  align-items:stretch;
}
.price-card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:32px 28px;
  transition:border-color .26s ease,transform .26s ease;
}
.price-card:hover{border-color:var(--line-2);transform:translateY(-4px)}
.price-card.is-featured{
  border:1px solid rgba(47,227,155,.42);
  background:linear-gradient(168deg,rgba(47,227,155,.09),rgba(23,29,28,.98) 42%);
  box-shadow:0 0 34px rgba(47,227,155,.10);
  transform:translateY(-8px);
}
.price-card.is-featured:hover{transform:translateY(-12px)}
.price-tag{
  position:absolute;
  top:-13px;
  left:28px;
  background:var(--amber);
  color:#2A1D00;
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  border-radius:var(--r-pill);
  padding:4px 14px;
}
.price-name{font-size:19px;font-weight:650;margin-bottom:8px}
.price-desc{color:var(--muted);font-size:14.5px;margin-bottom:22px;min-height:44px}
.price-value{
  font-family:var(--font-mono);
  font-size:26px;
  font-weight:600;
  letter-spacing:.01em;
  margin-bottom:24px;
  color:var(--text);
}
.price-value span{font-size:13px;color:var(--weak);margin-left:8px;letter-spacing:.06em}
.price-list{display:grid;gap:12px;margin-bottom:28px}
.price-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.8px;
  color:var(--muted);
}
.price-list li i{color:var(--accent);font-size:12px;margin-top:6px}
.price-card .btn{width:100%;margin-top:auto}

/* ---------- FAQ ---------- */
.faq-grid{
  display:grid;
  grid-template-columns:360px 1fr;
  gap:56px;
  align-items:start;
}
.faq-aside{position:sticky;top:96px}
.faq-aside h2{
  font-size:clamp(26px,3.2vw,42px);
  font-weight:750;
  line-height:1.2;
  margin-bottom:16px;
}
.faq-aside p{color:var(--muted);font-size:15.8px;margin-bottom:24px;max-width:32ch}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  gap:20px;
  text-align:left;
  background:transparent;
  border:0;
  padding:24px 4px;
  color:var(--text);
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  cursor:pointer;
  transition:color .22s ease;
  min-height:44px;
}
.faq-q:hover{color:var(--accent)}
.faq-icon{
  margin-left:auto;
  flex:none;
  width:30px;height:30px;
  border:1px solid var(--line-2);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  color:var(--muted);
  transition:transform .24s ease,color .24s ease,border-color .24s ease;
}
.faq-item.is-open .faq-q{color:var(--accent)}
.faq-item.is-open .faq-icon{
  transform:rotate(45deg);
  color:var(--accent);
  border-color:rgba(47,227,155,.5);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a-inner{
  padding:0 4px 26px;
  color:var(--muted);
  font-size:15.8px;
  line-height:1.85;
  max-width:68ch;
}

/* ---------- 结尾 CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(10,13,12,.9),rgba(10,13,12,.96)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  padding:72px 0;
}
.cta-box{
  position:relative;
  border:1px solid rgba(47,227,155,.32);
  border-radius:20px;
  padding:44px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  background:rgba(10,13,12,.6);
  box-shadow:0 0 30px rgba(47,227,155,.08) inset;
}
.cta-box h2{font-size:clamp(22px,2.6vw,32px);font-weight:750;line-height:1.3;margin-bottom:10px}
.cta-box p{color:var(--muted);font-size:15.8px;max-width:46ch}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--bg);
  border-top:1px solid var(--line);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:750;
  margin-bottom:16px;
}
.footer-brand .logo-mark{width:10px;height:10px}
.footer-desc{color:var(--muted);font-size:14.8px;max-width:34ch;line-height:1.8}
.footer-title{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--weak);
  margin-bottom:18px;
}
.footer-links{display:grid;gap:10px}
.footer-links a{
  font-size:14.8px;
  color:var(--muted);
  display:inline-block;
  transition:color .2s ease,transform .2s ease;
}
.footer-links a:hover{color:#fff;transform:translateX(2px)}
.footer-contact{display:grid;gap:12px}
.footer-contact li{
  display:flex;
  gap:10px;
  font-size:14.5px;
  color:var(--muted);
  line-height:1.7;
}
.footer-contact i{color:var(--accent);font-size:12.5px;margin-top:6px}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:24px 0 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  font-size:13.2px;
  color:var(--weak);
}
.footer-bottom span{font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:180;
  display:inline-flex;
  align-items:center;
  gap:10px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-pill);
  background:var(--accent);
  color:#04150E;
  font-size:14.5px;
  font-weight:700;
  box-shadow:0 12px 34px rgba(47,227,155,.28);
  opacity:0;
  transform:translateY(14px);
  pointer-events:none;
  transition:opacity .3s ease,transform .3s ease,filter .22s ease;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{filter:brightness(1.08);color:#04150E}
.float-bar{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:180;
  height:56px;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:0 16px;
  background:rgba(10,13,12,.94);
  backdrop-filter:blur(12px);
  border-top:1px solid var(--line-2);
}
.float-bar span{font-size:13px;color:var(--muted)}
.float-bar .btn{min-height:40px;padding:0 18px;font-size:14px}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  :root{--pad:88px}
}
@media (max-width:1199px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .hero-inner{grid-template-columns:1fr;gap:48px;padding:84px 0 80px}
  .login-mock{max-width:520px}
  .demo-grid{grid-template-columns:1fr;gap:24px}
  .demo-tabs{flex-direction:row;overflow-x:auto;padding-bottom:8px}
  .demo-tab{border-left:1px solid var(--line);border-bottom:2px solid var(--line-2);border-radius:var(--r-btn) var(--r-btn) 0 0;min-width:210px}
  .demo-tab.is-active{border-bottom-color:var(--accent);border-left-color:var(--line);background:linear-gradient(180deg,transparent,rgba(47,227,155,.10))}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:1023px){
  :root{--pad:72px}
  .sell-grid{grid-template-columns:1fr}
  .sell-wide-inner{grid-template-columns:1fr;gap:20px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;gap:32px}
  .price-card.is-featured{transform:none}
  .price-card.is-featured:hover{transform:translateY(-4px)}
}
@media (max-width:767px){
  :root{--pad:56px}
  body{font-size:16px}
  .container{padding:0 20px}
  .section-head{flex-direction:column;align-items:flex-start;gap:18px;margin-bottom:34px}
  .hero-inner{padding:64px 0 60px;gap:36px}
  .hero h1{font-size:clamp(32px,8.6vw,44px)}
  .hero-actions .btn{width:100%}
  .news-grid{grid-template-columns:1fr}
  .proof-card{flex:0 0 84%}
  .cta-box{padding:32px 24px;flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:32px}
  .float-cta{display:none}
  .float-bar{display:flex}
  .site-footer{padding-bottom:56px}
  .device-shot{aspect-ratio:4/3}
  .login-mock{padding:20px}
  .mock-captcha span{height:44px}
}
@media (max-width:479px){
  .proof-card{flex:0 0 88%}
  .price-card{padding:26px 22px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --bg:#0A0D0C;
  --bg-2:#101514;
  --surface:#171D1C;
  --surface-2:#1C2322;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#EDF2F0;
  --text-2:#A7B4B0;
  --text-3:#6E7A77;
  --accent:#2FE39B;
  --accent-soft:rgba(47,227,155,.12);
  --accent-glow:0 0 18px rgba(47,227,155,.22);
  --warn:#FFC46B;
  --error:#FF6B6B;
  --radius-card:16px;
  --radius-btn:12px;
  --radius-input:12px;
  --container:1200px;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --sans:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
p{margin:0 0 20px;}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.24;letter-spacing:-.01em;}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,227,155,.28);border-radius:8px;}

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

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:70;
  background:rgba(10,13,12,.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:border-color .3s ease, background .3s ease;
}
.site-header.is-scrolled{
  border-bottom:1px solid transparent;
  background:rgba(10,13,12,.94);
  box-shadow:0 1px 0 rgba(47,227,155,.35), 0 12px 30px rgba(0,0,0,.45);
}
.nav-inner{
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:.01em;}
.logo-mark{
  width:18px;height:18px;border-radius:5px;
  background:linear-gradient(140deg,var(--accent),#0f6a49);
  box-shadow:0 0 14px rgba(47,227,155,.5);
  flex:0 0 auto;
}
.logo-text{color:var(--text);white-space:nowrap;}
.logo-text b{color:var(--accent);font-weight:800;}

.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  justify-content:center;
}
.nav-link{
  position:relative;
  padding:8px 12px;
  font-size:14px;
  color:var(--text-2);
  border-radius:8px;
  transition:color .22s ease,background .22s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,rgba(47,227,155,0),var(--accent),rgba(47,227,155,0));
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .26s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{
  color:var(--text);
  text-shadow:0 0 14px rgba(47,227,155,.45);
}
.nav-link.is-active::after{transform:scaleX(1);}

.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent);
  color:#04150E;
  font-size:14px;
  font-weight:700;
  padding:10px 18px;
  border-radius:var(--radius-btn);
  transition:filter .2s ease,box-shadow .2s ease,transform .12s ease;
  white-space:nowrap;
}
.nav-cta:hover{filter:brightness(1.08);box-shadow:var(--accent-glow);}
.nav-cta:active{transform:translateY(1px);}
.nav-cta i{font-size:12px;}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  background:transparent;
  border:1px solid var(--line-2);
  border-radius:var(--radius-btn);
  position:relative;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;
  background:var(--text);
  transition:transform .26s ease,opacity .26s ease;
}
.nav-toggle span:nth-child(1){top:17px;}
.nav-toggle span:nth-child(2){top:25px;}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(4px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){transform:translateY(-4px) rotate(-45deg);}

.nav-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:var(--bg);
  padding:12px 0 28px;
}
.nav-drawer a{
  display:flex;align-items:center;gap:14px;
  padding:16px 24px;
  font-size:20px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.nav-drawer a .idx{font-family:var(--mono);font-size:13px;color:var(--text-3);}
.nav-drawer a.is-active{color:var(--text);}
.nav-drawer a.is-active .idx{color:var(--accent);}
body.nav-open .nav-drawer{display:block;}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--text-2);border-bottom:1px dashed rgba(255,255,255,.2);padding-bottom:1px;}
.breadcrumb a:hover{color:var(--accent);border-bottom-color:var(--accent);}
.breadcrumb .sep{font-family:var(--mono);color:var(--text-3);}
.breadcrumb .cur{color:var(--text);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  padding:140px 0 84px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.30;
  z-index:0;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(10,13,12,.72),rgba(10,13,12,.96)),
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 44px);
  z-index:1;
}
.page-hero .container{position:relative;z-index:2;}
.hero-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--accent);
  border:1px solid rgba(47,227,155,.35);
  background:rgba(47,227,155,.07);
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:22px;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px rgba(47,227,155,.9);
}
.page-hero h1{
  font-size:clamp(34px,4.6vw,58px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.01em;
  margin-bottom:20px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--accent);
  text-shadow:0 0 22px rgba(47,227,155,.35);
}
.hero-sub{
  font-size:17px;
  color:var(--text-2);
  max-width:56ch;
  margin-bottom:26px;
}
.micro-tags{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-bottom:28px;
}
.micro-tags span{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--text-2);
  border:1px solid var(--line-2);
  border-radius:999px;
  padding:5px 13px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:15px;font-weight:700;
  padding:14px 26px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  transition:filter .2s ease,box-shadow .2s ease,transform .12s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{background:var(--accent);color:#04150E;}
.btn-primary:hover{filter:brightness(1.08);box-shadow:var(--accent-glow);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border-color:rgba(255,255,255,.18);
}
.btn-ghost:hover{border-color:var(--accent);color:#D8FFF0;box-shadow:var(--accent-glow);}
.btn-ghost:active{transform:translateY(1px);}
.btn i{font-size:13px;}

.hero-visual{
  position:relative;
  border:1px solid var(--line-2);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--surface);
  box-shadow:0 24px 60px rgba(0,0,0,.5);
}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-visual figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:14px 18px;
  font-size:13px;
  color:var(--text-2);
  background:linear-gradient(180deg,rgba(10,13,12,0),rgba(10,13,12,.92));
}
.status-strip{
  display:flex;align-items:center;gap:10px;
  padding:12px 18px;
  border-bottom:1px solid var(--line);
  background:var(--bg-2);
  font-family:var(--mono);
  font-size:12px;
  color:var(--text-2);
}
.status-strip .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px rgba(47,227,155,.9);
  animation:blink 1s steps(1,end) infinite;
}
@keyframes blink{50%{opacity:.25;}}

/* ---------- layout with sticky toc ---------- */
.section{padding:88px 0;border-bottom:1px solid var(--line);}
.section-alt{background:var(--bg-2);}
.split-grid{
  display:grid;
  grid-template-columns:260px 1fr;
  gap:56px;
  align-items:start;
}
.toc{
  position:sticky;
  top:96px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  padding:22px 20px;
}
.toc-title{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--text-3);
  margin-bottom:16px;
  text-transform:uppercase;
}
.toc-list a{
  display:flex;gap:12px;
  padding:10px 10px 10px 12px;
  font-size:14px;
  color:var(--text-2);
  border-left:2px solid transparent;
  border-radius:0 8px 8px 0;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-list a .idx{font-family:var(--mono);font-size:12px;color:var(--text-3);}
.toc-list a:hover{color:var(--text);background:rgba(255,255,255,.04);}
.toc-list a.is-active{
  color:var(--text);
  border-left-color:var(--accent);
  background:rgba(47,227,155,.07);
}
.toc-list a.is-active .idx{color:var(--accent);}

.block{padding:6px 0 42px;}
.block:last-child{padding-bottom:0;}
.block h2{
  font-size:clamp(24px,2.6vw,34px);
  font-weight:750;
  margin-bottom:18px;
  position:relative;
  padding-top:16px;
}
.block h2::before{
  content:"";
  position:absolute;top:0;left:0;
  width:32px;height:3px;border-radius:3px;
  background:var(--accent);
  box-shadow:var(--accent-glow);
}
.block h3{font-size:19px;font-weight:650;margin:26px 0 10px;}
.block p{color:var(--text-2);max-width:72ch;}

.block-media{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:32px;
  align-items:center;
  margin:26px 0 8px;
  padding:24px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
}
.block-media img{
  border-radius:12px;
  border:1px solid var(--line);
  aspect-ratio:16/10;
  object-fit:cover;
}
.block-media .media-copy p{margin-bottom:0;}
.caption{font-size:13px;color:var(--text-3);margin-top:12px;}

.block-points{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
  margin-top:22px;
}
.point{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  padding:24px;
  transition:transform .28s ease,border-color .28s ease,background .28s ease;
}
.point:hover{transform:translateY(-4px);border-color:var(--line-2);background:var(--surface-2);}
.point .num{
  font-family:var(--mono);font-size:12px;color:var(--accent);letter-spacing:.1em;
  display:block;margin-bottom:12px;
}
.point h3{margin:0 0 8px;font-size:17px;}
.point p{margin:0;font-size:15px;color:var(--text-2);}

/* ---------- steps ---------- */
.steps{margin-top:28px;position:relative;}
.step{
  position:relative;
  display:grid;
  grid-template-columns:56px 1fr;
  gap:22px;
  padding-bottom:34px;
}
.step::before{
  content:"";
  position:absolute;
  left:27px;top:56px;bottom:0;
  width:1px;
  background:linear-gradient(180deg,rgba(47,227,155,.5),rgba(47,227,155,0));
}
.step:last-child{padding-bottom:0;}
.step:last-child::before{display:none;}
.step-dot{
  width:56px;height:56px;
  border-radius:50%;
  border:1px solid rgba(47,227,155,.4);
  background:var(--accent-soft);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:15px;color:var(--accent);
  box-shadow:var(--accent-glow);
  flex:0 0 auto;
}
.step-body{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  padding:22px 24px;
}
.step-body h3{margin:0 0 8px;font-size:18px;}
.step-body p{margin:0;color:var(--text-2);font-size:15px;}
.step-body .meta{
  display:inline-block;
  margin-top:12px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--warn);
  border:1px solid rgba(255,196,107,.35);
  border-radius:999px;
  padding:3px 11px;
}

/* ---------- compare ---------- */
.compare-table{
  margin-top:24px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--surface);
}
.compare-row{
  display:grid;
  grid-template-columns:.8fr 1.1fr 1.1fr;
  border-bottom:1px solid var(--line);
}
.compare-row:last-child{border-bottom:none;}
.compare-row > div{
  padding:18px 20px;
  font-size:15px;
  color:var(--text-2);
  border-right:1px solid var(--line);
}
.compare-row > div:last-child{border-right:none;}
.compare-head > div{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--text-3);
  background:var(--bg-2);
}
.compare-row .key{color:var(--text);font-weight:600;}

/* ---------- faq ---------- */
.faq{margin-top:26px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 4px;
  background:transparent;
  border:none;
  color:var(--text);
  font-size:17px;
  font-weight:600;
  text-align:left;
  transition:color .2s ease,box-shadow .2s ease;
  border-radius:10px;
}
.faq-q:hover{color:#D8FFF0;}
.faq-q .faq-icon{
  flex:0 0 auto;
  width:28px;height:28px;
  border-radius:50%;
  border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);
  font-size:15px;
  color:var(--text-2);
  transition:transform .24s ease,color .24s ease,border-color .24s ease;
}
.faq-item.is-open .faq-icon{
  transform:rotate(45deg);
  color:var(--accent);
  border-color:rgba(47,227,155,.55);
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a p{
  margin:0 0 20px;
  padding-right:44px;
  color:var(--text-2);
  max-width:68ch;
  font-size:15px;
}

/* ---------- CTA ---------- */
.cta-band{
  padding:0 0 96px;
}
.cta-inner{
  position:relative;
  border:1px solid transparent;
  border-radius:var(--radius-card);
  background:
    linear-gradient(var(--bg-2),var(--bg-2)) padding-box,
    linear-gradient(120deg,rgba(47,227,155,.7),rgba(47,227,155,0) 40%,rgba(47,227,155,.7)) border-box;
  padding:48px 44px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:26px;
  overflow:hidden;
}
.cta-inner::after{
  content:"";
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
  opacity:.12;
  pointer-events:none;
}
.cta-inner > *{position:relative;z-index:1;}
.cta-inner h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px;}
.cta-inner p{margin:0;color:var(--text-2);max-width:56ch;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--bg);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:700;font-size:16px;margin-bottom:14px;
}
.footer-desc{font-size:14px;color:var(--text-2);max-width:34ch;margin:0;}
.footer-title{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--text-3);
  margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{
  font-size:14px;color:var(--text-2);
  transition:color .2s ease,transform .2s ease;
  width:fit-content;
}
.footer-links a:hover{color:var(--text);transform:translateX(2px);}
.footer-contact li{
  display:flex;gap:10px;
  font-size:14px;color:var(--text-2);
  margin-bottom:10px;
}
.footer-contact i{font-size:5px;color:var(--accent);margin-top:11px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:22px;
  font-size:13px;color:var(--text-3);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease;}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media screen and (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{display:block;}
  .nav-cta{padding:10px 14px;font-size:13px;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .split-grid{grid-template-columns:1fr;gap:32px;}
  .toc{position:static;}
  .toc-list{display:flex;flex-wrap:wrap;gap:8px;}
  .toc-list a{border-left:none;border:1px solid var(--line);border-radius:999px;padding:8px 14px;}
  .toc-list a.is-active{border-color:rgba(47,227,155,.5);}
  .block-media{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media screen and (max-width:767px){
  .container{padding:0 20px;}
  .page-hero{padding:118px 0 60px;}
  .section{padding:56px 0;}
  .block-points{grid-template-columns:1fr;}
  .compare-row{grid-template-columns:1fr;border-bottom:1px solid var(--line);}
  .compare-row > div{border-right:none;border-bottom:1px dashed var(--line);}
  .compare-row > div:last-child{border-bottom:none;}
  .compare-head{display:none;}
  .compare-row .key{
    background:var(--bg-2);
    color:var(--accent);
    font-family:var(--mono);
    font-size:12px;
    letter-spacing:.08em;
  }
  .cta-inner{padding:34px 24px;}
  .cta-band{padding-bottom:64px;}
  .step{grid-template-columns:44px 1fr;gap:16px;}
  .step-dot{width:44px;height:44px;font-size:13px;}
  .step::before{left:21px;top:44px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
}
@media screen and (max-width:519px){
  .page-hero h1{font-size:30px;}
  .hero-actions .btn{width:100%;}
  .block-media{padding:16px;}
  .point,.step-body{padding:18px;}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --bg:#0A0D0C;
  --bg-2:#101514;
  --surface:#171D1C;
  --surface-2:#1D2524;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#EDF2F0;
  --text-2:#A7B4B0;
  --text-3:#6E7A77;
  --accent:#2FE39B;
  --accent-ink:#04150E;
  --amber:#FFC46B;
  --danger:#FF6B6B;
  --r-card:16px;
  --r-btn:12px;
  --r-input:12px;
  --r-pill:999px;
  --font-sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --glow:0 0 18px rgba(47,227,155,.22);
  --shadow:0 18px 44px rgba(0,0,0,.45);
  --container:1200px;
  --sec-pad:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(47,227,155,.28);color:#04150E}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,227,155,.28);border-radius:8px}

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

/* ===== Buttons ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:14px 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:650;
  line-height:1;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .25s ease,filter .2s ease,border-color .25s ease,color .2s ease,background-color .25s ease;
  min-height:44px;
}
.btn-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn-primary:hover{filter:brightness(1.08);box-shadow:var(--glow)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.18)}
.btn-ghost:hover{border-color:var(--accent);color:#E8FFF5;box-shadow:0 0 0 1px rgba(47,227,155,.18)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:10px 18px;font-size:14px;min-height:40px}
.link-underline{
  display:inline-flex;align-items:center;gap:6px;
  border-bottom:1px dashed rgba(167,180,176,.55);
  color:var(--text-2);font-size:14px;
  transition:color .2s ease,border-color .2s ease;
}
.link-underline i{transition:transform .2s ease}
.link-underline:hover{color:var(--text);border-bottom-style:solid;border-bottom-color:var(--accent)}
.link-underline:hover i{transform:translateX(3px)}

/* ===== Badges / tags ===== */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  font-size:13px;
  letter-spacing:.04em;
  border:1px solid var(--line-2);
  color:var(--text-2);
  background:rgba(255,255,255,.02);
}
.badge-accent{border-color:rgba(47,227,155,.45);color:#B9F5DC;background:rgba(47,227,155,.07)}
.badge-amber{border-color:rgba(255,196,107,.42);color:#FFDCA6;background:rgba(255,196,107,.07)}
.tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:13px;letter-spacing:.04em;
  border:1px solid var(--line);
  color:var(--text-2);
  background:var(--surface);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.tag:hover{border-color:rgba(47,227,155,.5);color:#CBF7E5;transform:translateY(-2px)}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,13,12,.82);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,155,.85),transparent);
  opacity:.3;transition:opacity .3s ease;
}
.site-header.is-scrolled::after{opacity:1}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800}
.logo-mark{width:10px;height:10px;border-radius:3px;background:var(--accent);box-shadow:var(--glow);flex:0 0 auto}
.logo-text{font-size:17px;letter-spacing:-.01em;color:var(--text)}
.logo-text b{color:var(--accent);font-weight:800}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;padding:6px 0;font-size:14px;color:var(--text-2);
  transition:color .2s ease;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--text);text-shadow:0 0 12px rgba(47,227,155,.35)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-btn);
  background:var(--accent);color:var(--accent-ink);
  font-size:14px;font-weight:700;white-space:nowrap;
  transition:filter .2s ease,box-shadow .25s ease,transform .2s ease;
}
.nav-cta:hover{filter:brightness(1.08);box-shadow:var(--glow)}
.nav-cta:active{transform:translateY(1px)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--line-2);
  position:relative;cursor:pointer;padding:0;
}
.nav-toggle span{
  position:absolute;left:12px;right:12px;height:2px;border-radius:2px;
  background:var(--text);transition:transform .28s ease,opacity .２s ease,top .28s ease;
}
.nav-toggle span:nth-child(1){top:17px}
.nav-toggle span:nth-child(2){top:25px}
.nav-toggle.is-open span:nth-child(1){top:21px;transform:rotate(45deg);background:var(--accent)}
.nav-toggle.is-open span:nth-child(2){top:21px;transform:rotate(-45deg);background:var(--accent)}

/* ===== Article hero ===== */
.article-hero{
  position:relative;
  padding:60px 0 46px;
  border-bottom:1px solid var(--line);
  background-color:var(--bg-2);
  background-image:
    linear-gradient(180deg,rgba(10,13,12,.88),rgba(10,13,12,.96)),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  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:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent);
}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--text-3);margin-bottom:22px;
  font-family:var(--font-mono);letter-spacing:.02em;
}
.breadcrumb a{color:var(--text-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--text-3);opacity:.6}
.breadcrumb .current{color:var(--text-2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero h1{
  font-size:clamp(28px,3.8vw,46px);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.01em;
  margin:18px 0 20px;
  max-width:22ch;
  color:var(--text);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;
  font-size:13px;color:var(--text-3);
  font-family:var(--font-mono);letter-spacing:.03em;
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:8px}
.article-meta i{color:var(--accent);opacity:.85}
.article-meta a{color:var(--text-2);transition:color .2s ease}
.article-meta a:hover{color:var(--accent)}

/* ===== Layout ===== */
.article-main{padding:64px 0 8px;background:var(--bg)}
.article-layout{align-items:flex-start}
.article-col{padding-bottom:8px}
.article-aside{padding-bottom:8px}

/* ===== Article body ===== */
.article-body{
  font-size:17px;
  line-height:1.92;
  color:#DCE5E2;
  max-width:72ch;
  overflow-wrap:break-word;
}
.article-body h2{
  position:relative;
  font-size:clamp(22px,2.4vw,30px);
  font-weight:750;
  line-height:1.32;
  color:var(--text);
  margin:52px 0 20px;
  padding-top:6px;
  scroll-margin-top:96px;
}
.article-body h2::before{
  content:"";display:block;width:32px;height:3px;border-radius:2px;
  background:var(--accent);box-shadow:var(--glow);margin-bottom:16px;
}
.article-body h3{
  font-size:clamp(18px,1.7vw,22px);
  font-weight:650;line-height:1.4;color:var(--text);
  margin:34px 0 14px;scroll-margin-top:96px;
}
.article-body h4{
  font-size:17px;font-weight:650;color:#DCE5E2;margin:26px 0 12px;
}
.article-body p{margin:0 0 20px}
.article-body strong{color:#F4FAF8;font-weight:650}
.article-body ul{margin:0 0 22px;padding-left:0;list-style:none}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.78em;width:6px;height:6px;
  border-radius:2px;background:var(--accent);opacity:.75;
}
.article-body ol{margin:0 0 22px;padding-left:26px;list-style:decimal}
.article-body ol li{margin-bottom:10px;padding-left:4px}
.article-body ol li::marker{color:var(--accent);font-family:var(--font-mono);font-size:.92em}
.article-body blockquote{
  margin:26px 0;padding:18px 24px;
  border-left:3px solid var(--accent);
  background:var(--surface);
  border-radius:0 var(--r-card) var(--r-card) 0;
  color:#DCE5E2;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  border-radius:var(--r-card);border:1px solid var(--line);
  margin:26px 0 12px;width:100%;
}
.article-body figure{margin:26px 0}
.article-body figure img{margin:0 0 10px}
.article-body figcaption{
  font-size:13px;color:var(--text-3);
  font-family:var(--font-mono);letter-spacing:.04em;
}
.article-body pre{
  margin:0 0 24px;padding:18px 20px;
  background:#0B100F;border:1px solid var(--line);
  border-radius:var(--r-card);overflow-x:auto;
  font-family:var(--font-mono);font-size:14px;line-height:1.75;color:#D6E4DF;
}
.article-body code{
  font-family:var(--font-mono);font-size:.9em;
  background:rgba(47,227,155,.1);
  border:1px solid rgba(47,227,155,.18);
  border-radius:6px;padding:2px 6px;color:#BFF5DE;
}
.article-body pre code{background:none;border:0;padding:0;color:inherit;font-size:inherit}
.article-body table{
  display:block;width:100%;max-width:100%;overflow-x:auto;
  border-collapse:collapse;margin:0 0 26px;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r-card);
}
.article-body th,.article-body td{
  padding:12px 16px;border-bottom:1px solid var(--line);
  text-align:left;white-space:normal;min-width:120px;
}
.article-body th{background:var(--surface-2);font-weight:650;font-size:14px;color:var(--text)}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.018)}
.article-body a{color:var(--accent);border-bottom:1px dashed rgba(47,227,155,.5);transition:border-color .2s ease}
.article-body a:hover{border-bottom-style:solid}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.article-body > *:first-child{margin-top:0}

.article-divider{height:1px;background:var(--line);margin:44px 0 28px}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.article-tags .label{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--text-3);
}
.article-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

.empty-state{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:48px 32px;text-align:center;
}
.empty-state i{font-size:30px;color:var(--accent);margin-bottom:16px;display:block}
.empty-state h2{font-size:24px;font-weight:750;margin-bottom:10px}
.empty-state p{color:var(--text-2);margin-bottom:22px}

/* ===== Aside ===== */
.toc-card{
  position:sticky;top:88px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px 22px;
}
.toc-title{
  font-size:13px;letter-spacing:.08em;color:var(--text-3);
  font-family:var(--font-mono);margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column}
.toc-list a{
  display:block;font-size:14px;color:var(--text-2);
  padding:8px 0 8px 12px;border-left:2px solid transparent;
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
  line-height:1.55;
}
.toc-list a:hover{color:var(--text)}
.toc-list a.is-active{
  color:var(--accent);border-left-color:var(--accent);
  background:rgba(47,227,155,.06);
}
.toc-card.is-hidden{display:none}
.side-card{
  margin-top:20px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;
}
.side-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.side-card p{font-size:14px;color:var(--text-2);line-height:1.75;margin-bottom:16px}
.side-links{display:flex;flex-direction:column}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--text-2);
  padding:11px 0;border-bottom:1px solid var(--line);
  transition:color .2s ease,padding-left .2s ease;
}
.side-links a:last-child{border-bottom:0}
.side-links a:hover{color:var(--accent);padding-left:4px}
.side-links span{font-family:var(--font-mono);font-size:12px;color:var(--text-3)}

/* ===== Section base ===== */
.section{padding:var(--sec-pad) 0}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:20px;margin-bottom:44px;
}
.section-head h2{
  font-size:clamp(24px,2.8vw,36px);font-weight:750;line-height:1.24;letter-spacing:-.01em;
}
.section-head p{color:var(--text-2);font-size:15px;margin-top:10px;max-width:56ch}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--accent);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--accent);opacity:.7}

/* ===== Card grid ===== */
.card-grid{display:grid;gap:24px;grid-template-columns:repeat(3,1fr)}
.card{
  position:relative;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .28s ease,border-color .28s ease,background-color .28s ease;
  display:flex;flex-direction:column;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,155,.9),transparent);
  opacity:0;transition:opacity .28s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-2);background:var(--surface-2)}
.card:hover::before{opacity:1}
.card-media{aspect-ratio:16/10;overflow:hidden;background:var(--bg-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:24px 26px 28px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:19px;font-weight:700;line-height:1.4}
.card-body p{font-size:14px;color:var(--text-2);line-height:1.78}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  gap:12px;font-size:13px;color:var(--text-3);font-family:var(--font-mono);
}
.card-dot{
  position:absolute;top:16px;left:16px;width:8px;height:8px;border-radius:2px;
  background:var(--accent);box-shadow:var(--glow);z-index:2;
}

/* ===== CTA strip ===== */
.cta-strip{padding:0 0 var(--sec-pad)}
.cta-inner{
  position:relative;
  border:1px solid rgba(47,227,155,.35);
  border-radius:var(--r-card);
  background:
    linear-gradient(135deg,rgba(47,227,155,.08),rgba(10,13,12,.2) 55%),
    var(--bg-2);
  padding:52px 48px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  overflow:hidden;
}
.cta-inner::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:48px 48px;
  mask-image:radial-gradient(circle at 80% 20%,rgba(0,0,0,.9),transparent 70%);
  -webkit-mask-image:radial-gradient(circle at 80% 20%,rgba(0,0,0,.9),transparent 70%);
}
.cta-inner h2{
  font-size:clamp(22px,2.6vw,32px);font-weight:750;line-height:1.28;
  margin-bottom:10px;position:relative;z-index:1;
}
.cta-inner p{color:var(--text-2);font-size:15px;max-width:52ch;position:relative;z-index:1}
.cta-inner .btn{position:relative;z-index:1}

/* ===== Footer ===== */
.site-footer{
  background:var(--bg);
  border-top:1px solid var(--line);
  padding:72px 0 0;
}
.footer-grid{
  display:grid;gap:36px;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  padding-bottom:52px;
}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;margin-bottom:14px}
.footer-brand .logo-text{font-size:17px}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.8;max-width:34ch}
.footer-title{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--text-3);margin-bottom:16px;
}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-links a:hover{color:var(--text);transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:11px}
.footer-contact li{
  display:flex;align-items:flex-start;gap:9px;
  font-size:14px;color:var(--text-2);line-height:1.7;
}
.footer-contact i{font-size:5px;color:var(--accent);margin-top:11px;flex:0 0 auto}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);font-family:var(--font-mono);letter-spacing:.02em;
}

/* ===== Motion ===== */
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.fade-up.is-visible{opacity:1;transform:none}

/* ===== Responsive ===== */
@media screen and (max-width:1199px){
  :root{--container:1080px}
}
@media screen and (max-width:1023px){
  :root{--sec-pad:56px}
  .container{padding-left:20px;padding-right:20px}
  .nav-links{
    position:fixed;inset:64px 0 0 0;
    background:var(--bg);
    flex-direction:column;align-items:flex-start;gap:0;
    padding:28px 24px 48px;
    border-top:1px solid var(--line);
    transform:translateY(-12px);
    opacity:0;visibility:hidden;pointer-events:none;
    transition:opacity .26s ease,transform .26s ease,visibility .26s;
    overflow-y:auto;
  }
  .nav-links.is-open{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav-link{
    width:100%;font-size:20px;padding:16px 0;
    border-bottom:1px solid var(--line);color:var(--text);
  }
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--accent)}
  .nav-toggle{display:block}
  .nav-cta{height:38px;padding:0 14px;font-size:13px}
  .logo-text{font-size:15px}
  .article-hero{padding:40px 0 34px}
  .article-hero h1{max-width:none}
  .article-main{padding:44px 0 8px}
  .article-aside{margin-top:36px}
  .toc-card{position:static}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{padding:38px 28px}
}
@media screen and (max-width:639px){
  .nav-cta{display:none}
  .article-hero h1{font-size:26px}
  .article-body{font-size:16px;line-height:1.88}
  .article-actions .btn{width:100%}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-inner{padding:32px 22px}
  .cta-inner .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .fade-up{opacity:1;transform:none}
}

/* roulang page: category2 */
:root{
  --bg:#0A0D0C;
  --bg-2:#101514;
  --surface:#171D1C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --text:#EDF2F0;
  --text-2:#A7B4B0;
  --text-3:#6E7A77;
  --accent:#2FE39B;
  --accent-soft:rgba(47,227,155,.22);
  --accent-ink:#04150E;
  --amber:#FFC46B;
  --danger:#FF6B6B;
  --radius-card:16px;
  --radius-btn:12px;
  --radius-pill:999px;
  --glow:0 0 18px rgba(47,227,155,.22);
  --font-sans:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,monospace;
  --container:1200px;
  --header-h:64px;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:none;background:none;}

h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}

h1,h2,h3,h4{font-weight:750;line-height:1.2;letter-spacing:-.01em;}

::selection{background:rgba(47,227,155,.28);color:#fff;}

:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,227,155,.28);border-radius:8px;}

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

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  height:var(--header-h);
  background:rgba(10,13,12,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,155,.45),transparent);
  opacity:.7;
}
.nav-inner{
  height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
}
.logo-mark{
  width:10px;height:10px;
  border-radius:3px;
  background:var(--accent);
  box-shadow:var(--glow);
  flex:none;
}
.logo-text{color:var(--text);}
.logo-text b{color:var(--accent);font-weight:800;}

.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  counter-reset:nav;
}
.nav-link{
  position:relative;
  font-size:14px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
}
.nav-link:hover{color:#fff;}
.nav-link:hover::after{transform:scaleX(.6);}
.nav-link.active{color:var(--text);text-shadow:0 0 14px rgba(47,227,155,.35);}
.nav-link.active::after{transform:scaleX(1);}

.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--radius-btn);
  background:var(--accent);
  color:var(--accent-ink);
  font-size:14px;
  font-weight:700;
  transition:filter .2s ease,box-shadow .2s ease,transform .12s ease;
}
.nav-cta:hover{filter:brightness(1.08);box-shadow:var(--glow);}
.nav-cta:active{transform:translateY(1px);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:6px;
  border-radius:10px;
}
.nav-toggle span{
  display:block;
  width:20px;height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .24s ease,opacity .24s ease;
}
.site-header.nav-open .nav-toggle span:first-child{transform:translateY(4px) rotate(45deg);}
.site-header.nav-open .nav-toggle span:last-child{transform:translateY(-4px) rotate(-45deg);}

/* ============ 内页首屏 ============ */
.page-hero{
  position:relative;
  padding:150px 0 88px;
  background-image:
    linear-gradient(180deg,rgba(10,13,12,.86) 0%,rgba(10,13,12,.94) 70%,var(--bg) 100%),
    url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.page-hero::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:64px 64px;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2;}

.crumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:26px;
  font-family:var(--font-mono);
}
.crumb a{color:var(--text-2);transition:color .2s ease;}
.crumb a:hover{color:var(--accent);}
.crumb i{font-size:10px;color:var(--text-3);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--accent);
  border:1px solid rgba(47,227,155,.35);
  border-radius:var(--radius-pill);
  padding:6px 16px;
  margin-bottom:24px;
}

.page-hero h1{
  font-size:clamp(32px,4.6vw,58px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.015em;
  max-width:20ch;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--accent);
}
.page-hero-sub{
  margin-top:22px;
  font-size:17px;
  color:var(--text-2);
  max-width:56ch;
}
.micro-tags{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:34px;
}
.micro-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--text-2);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:7px 16px;
  background:rgba(23,29,28,.6);
}
.micro-tag i{color:var(--accent);font-size:11px;}

/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:40px;
  margin-bottom:56px;
}
.section-head h2{
  font-size:clamp(26px,3.2vw,42px);
  max-width:20ch;
}
.section-head h2 span{color:var(--accent);}
.section-head .head-note{
  max-width:44ch;
  color:var(--text-2);
  font-size:15px;
}

/* ============ 图文对照行 ============ */
.split-list{display:block;}
.split-row{
  padding:64px 0;
  border-top:1px solid var(--line);
}
.split-list > .split-row:first-child{border-top:none;padding-top:0;}
.split-list > .split-row:last-child{padding-bottom:0;}

.split-copy .block-index{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.16em;
  color:var(--accent);
  margin-bottom:14px;
}
.split-copy h3{
  font-size:clamp(20px,1.9vw,26px);
  font-weight:700;
  margin-bottom:16px;
}
.split-copy p{
  color:var(--text-2);
  font-size:16px;
  max-width:56ch;
}
.point-list{margin-top:22px;display:grid;gap:12px;}
.point-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.7;
}
.point-list li i{
  flex:none;
  margin-top:5px;
  font-size:12px;
  color:var(--accent);
}
.point-list li b{color:var(--text);font-weight:650;}

.split-media{
  position:relative;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  overflow:hidden;
  background:var(--surface);
  transition:border-color .24s ease,transform .24s ease;
}
.split-media:hover{border-color:var(--line-strong);transform:translateY(-4px);}
.split-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .5s ease;
}
.split-media:hover img{transform:scale(1.03);}
.split-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,13,12,0) 45%,rgba(10,13,12,.72) 100%);
  pointer-events:none;
}
.split-media figcaption{
  position:absolute;
  left:20px;right:20px;bottom:16px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.04em;
  color:var(--text-2);
}

/* ============ 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(--surface);
  overflow:hidden;
}
.stat-item{
  padding:34px 26px;
  border-left:1px solid var(--line);
  transition:background .24s ease;
}
.stat-item:first-child{border-left:none;}
.stat-item:hover{background:rgba(47,227,155,.05);}
.stat-item .stat-num{
  font-family:var(--font-mono);
  font-size:clamp(24px,2.6vw,34px);
  font-weight:700;
  color:var(--accent);
  line-height:1.2;
}
.stat-item .stat-label{
  display:block;
  margin-top:8px;
  font-size:14.5px;
  color:var(--text);
}
.stat-item .stat-desc{
  display:block;
  margin-top:6px;
  font-size:13px;
  color:var(--text-3);
  line-height:1.7;
}

/* ============ 错位规格卡 ============ */
.spec-pair{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:32px;
  align-items:start;
}
.spec-card{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  padding:36px 32px;
  transition:border-color .24s ease,transform .24s ease;
}
.spec-card:hover{border-color:var(--line-strong);transform:translateY(-4px);}
.spec-card.offset{margin-top:56px;}
.spec-card .spec-tag{
  display:inline-flex;
  align-items:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--amber);
  border:1px solid rgba(255,196,107,.35);
  border-radius:var(--radius-pill);
  padding:5px 14px;
  margin-bottom:20px;
}
.spec-card.offset .spec-tag{color:var(--accent);border-color:rgba(47,227,155,.35);}
.spec-card h3{font-size:20px;margin-bottom:14px;}
.spec-card p{color:var(--text-2);font-size:15px;margin-bottom:22px;}
.spec-list{display:grid;gap:0;}
.spec-list li{
  display:flex;
  justify-content:space-between;
  gap:18px;
  padding:14px 0;
  border-top:1px solid var(--line);
  font-size:14.5px;
  color:var(--text-2);
}
.spec-list li:first-child{border-top:none;}
.spec-list li span:last-child{
  font-family:var(--font-mono);
  color:var(--text);
  white-space:nowrap;
}

/* ============ FAQ ============ */
.faq-wrap{
  display:grid;
  grid-template-columns:1fr 1.6fr;
  gap:64px;
  align-items:start;
}
.faq-aside{position:sticky;top:104px;}
.faq-aside h2{font-size:clamp(26px,3.2vw,42px);margin-bottom:18px;}
.faq-aside p{color:var(--text-2);font-size:15.5px;max-width:34ch;}
.faq-aside .aside-tip{
  display:flex;
  align-items:flex-start;
  gap:12px;
  margin-top:28px;
  padding:18px 20px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  font-size:14px;
  color:var(--text-2);
}
.faq-aside .aside-tip i{color:var(--accent);margin-top:4px;font-size:13px;}

.account-accordion{
  border-top:1px solid var(--line);
  margin:0;
}
.account-accordion .accordion-item{
  background:transparent;
  border-bottom:1px solid var(--line);
}
.account-accordion .accordion-title{
  position:relative;
  display:block;
  padding:24px 60px 24px 0;
  background:transparent;
  border:none;
  color:var(--text);
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  transition:color .2s ease;
}
.account-accordion .accordion-title::before{display:none;}
.account-accordion .accordion-title::after{
  content:"+";
  position:absolute;
  right:8px;
  top:26px;
  width:28px;height:28px;
  display:flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line-strong);
  border-radius:50%;
  font-family:var(--font-mono);
  font-size:15px;
  line-height:1;
  color:var(--text-2);
  transition:transform .24s ease,color .24s ease,border-color .24s ease;
}
.account-accordion .accordion-title:hover{color:var(--accent);}
.account-accordion .accordion-title[aria-expanded="true"]{
  color:var(--accent);
}
.account-accordion .accordion-title[aria-expanded="true"]::after{
  transform:rotate(45deg);
  color:var(--accent);
  border-color:rgba(47,227,155,.55);
  box-shadow:var(--glow);
}
.account-accordion .accordion-content{
  background:transparent;
  border:none;
  padding:0 60px 26px 0;
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.85;
  max-width:68ch;
}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;
  border:1px solid rgba(47,227,155,.35);
  border-radius:var(--radius-card);
  padding:52px 48px;
  background:
    linear-gradient(180deg,rgba(23,29,28,.9),rgba(10,13,12,.9)),
    url("/assets/images/backpic/back-3.png");
  background-size:cover;
  background-position:center;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  box-shadow:var(--glow);
}
.cta-band h2{font-size:clamp(22px,2.4vw,32px);margin-bottom:12px;}
.cta-band p{color:var(--text-2);font-size:15.5px;max-width:52ch;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  white-space:nowrap;
  transition:filter .2s ease,box-shadow .2s ease,transform .12s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{background:var(--accent);color:var(--accent-ink);}
.btn-primary:hover{filter:brightness(1.08);box-shadow:var(--glow);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  border:1px solid var(--line-strong);
  color:var(--text);
  background:transparent;
}
.btn-ghost:hover{border-color:var(--accent);color:#fff;box-shadow:var(--glow);}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg);
  border-top:1px solid var(--line);
  padding:72px 0 34px;
  margin-top:96px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1.2fr 1.4fr;
  gap:44px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  margin-bottom:16px;
}
.footer-desc{
  color:var(--text-2);
  font-size:14.5px;
  max-width:38ch;
  line-height:1.8;
}
.footer-title{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--text-3);
  margin-bottom:18px;
}
.footer-links{display:grid;gap:12px;}
.footer-links a{
  font-size:14.5px;
  color:var(--text-2);
  transition:color .2s ease,transform .2s ease;
  display:inline-block;
}
.footer-links a:hover{color:#fff;transform:translateX(-2px);}
.footer-contact{display:grid;gap:12px;}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
}
.footer-contact li i{
  font-size:6px;
  color:var(--accent);
  margin-top:9px;
  flex:none;
}
.footer-bottom{
  margin-top:52px;
  padding-top:24px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-mono);
}

/* ============ 进入动效 ============ */
.fade-up{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .4s ease,transform .4s ease;
}
.fade-up.is-visible{opacity:1;transform:translateY(0);}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-toggle{display:flex;}
  .nav-links{
    position:fixed;
    top:var(--header-h);
    left:0;right:0;bottom:0;
    background:var(--bg);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:24px;
    transform:translateX(100%);
    transition:transform .3s ease;
    overflow-y:auto;
  }
  .site-header.nav-open .nav-links{transform:translateX(0);}
  .nav-link{
    font-size:20px;
    padding:20px 0;
    border-bottom:1px solid var(--line);
    display:flex;
    align-items:center;
  }
  .nav-link::before{
    counter-increment:nav;
    content:"0" counter(nav);
    font-family:var(--font-mono);
    font-size:12px;
    color:var(--text-3);
    margin-right:14px;
  }
  .nav-link::after{display:none;}
  .nav-link.active{color:var(--accent);}

  .faq-wrap{grid-template-columns:1fr;gap:40px;}
  .faq-aside{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(3){border-left:none;}
  .stat-item{border-top:1px solid var(--line);}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-top:none;}
  .spec-pair{grid-template-columns:1fr;}
  .spec-card.offset{margin-top:0;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 30px;}
}

@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px;}
  .section{padding:56px 0;}
  .page-hero{padding:118px 0 64px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:36px;}
  .split-row{padding:44px 0;}
  .split-copy p{font-size:15.5px;}
  .stat-strip{grid-template-columns:1fr;}
  .stat-item{border-left:none !important;border-top:1px solid var(--line);}
  .stat-item:first-child{border-top:none;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{margin-top:64px;padding:56px 0 30px;}
  .footer-bottom{flex-direction:column;}
  .account-accordion .accordion-title{font-size:16px;padding-right:52px;}
  .account-accordion .accordion-content{padding-right:0;}
  .cta-band{padding:34px 22px;}
  .nav-cta{display:none;}
}

@media (max-width:519px){
  .logo{font-size:15px;}
  .page-hero h1{max-width:none;}
  .micro-tag{font-size:12px;padding:6px 13px;}
  .btn{width:100%;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .fade-up{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --bg:#0A0D0C;
  --bg-2:#101514;
  --surface:#171D1C;
  --surface-2:#1C2422;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#EDF2F0;
  --text-2:#A7B4B0;
  --text-3:#6E7A77;
  --accent:#2FE39B;
  --accent-soft:rgba(47,227,155,.12);
  --accent-glow:rgba(47,227,155,.22);
  --warn:#FFC46B;
  --err:#FF6B6B;
  --radius-card:16px;
  --radius-btn:12px;
  --radius-input:12px;
  --radius-pill:999px;
  --container:1200px;
  --gutter:24px;
  --section-pad:96px;
  --font-cn:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
p{margin:0 0 20px;}
p:last-child{margin-bottom:0;}
h1,h2,h3,h4{margin:0;font-weight:750;line-height:1.25;letter-spacing:-.01em;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
input{font-family:inherit;}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(47,227,155,.28);border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 var(--gutter);
}
@media (min-width:1440px){
  .container{max-width:1280px;}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  height:64px;
  background:rgba(10,13,12,.82);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:border-color .3s ease,background .3s ease;
}
.site-header.is-scrolled{
  background:rgba(10,13,12,.94);
  border-bottom-color:transparent;
  box-shadow:0 1px 0 rgba(47,227,155,.28),0 0 18px rgba(47,227,155,.14);
}
.nav-inner{
  height:64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.logo-mark{
  width:10px;height:10px;
  border-radius:3px;
  background:var(--accent);
  box-shadow:0 0 12px var(--accent-glow);
  flex:none;
}
.logo-text{color:var(--text);}
.logo-text b{font-weight:800;color:var(--accent);}

.nav-links{
  display:flex;
  align-items:center;
  gap:24px;
}
.nav-link{
  position:relative;
  font-size:14px;
  color:var(--text-2);
  padding:6px 0;
  transition:color .22s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s ease;
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{
  color:var(--text);
  text-shadow:0 0 14px var(--accent-glow);
}
.nav-link.active::after{transform:scaleX(1);}

.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:40px;
  padding:0 18px;
  border-radius:var(--radius-btn);
  background:var(--accent);
  color:#04150E;
  font-size:14px;
  font-weight:700;
  transition:filter .2s ease,box-shadow .2s ease,transform .2s ease;
}
.nav-cta:hover{filter:brightness(1.08);box-shadow:0 0 20px var(--accent-glow);}
.nav-cta:active{transform:translateY(1px);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  position:relative;
  border-radius:10px;
  border:1px solid var(--line);
}
.nav-toggle span{
  position:absolute;
  left:12px;right:12px;
  height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform .26s ease,opacity .2s ease,background .2s ease;
}
.nav-toggle span:nth-child(1){top:17px;}
.nav-toggle span:nth-child(2){top:25px;}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(4px) rotate(45deg);background:var(--accent);}
body.nav-open .nav-toggle span:nth-child(2){transform:translateY(-4px) rotate(-45deg);background:var(--accent);}

@media (max-width:1099px){
  .nav-links{
    position:fixed;
    top:64px;left:0;right:0;bottom:0;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:24px 24px 48px;
    background:var(--bg);
    border-top:1px solid var(--line);
    transform:translateY(-10px);
    opacity:0;
    visibility:hidden;
    transition:opacity .26s ease,transform .26s ease,visibility .26s;
    overflow-y:auto;
  }
  body.nav-open .nav-links{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-links .nav-link{
    width:100%;
    font-size:20px;
    font-weight:600;
    color:var(--text-2);
    padding:18px 0;
    border-bottom:1px solid var(--line);
    display:flex;
    align-items:center;
    counter-increment:navIdx;
  }
  .nav-links .nav-link::before{
    content:"0" counter(navIdx);
    font-family:var(--font-mono);
    font-size:13px;
    color:var(--text-3);
    margin-right:14px;
  }
  .nav-links{counter-reset:navIdx;}
  .nav-link::after{display:none;}
  .nav-link.active{color:var(--accent);}
  .nav-toggle{display:block;}
  .nav-cta{height:38px;padding:0 14px;font-size:13px;}
  .nav-cta i{display:none;}
}
@media (max-width:520px){
  .nav-cta{display:none;}
}

/* ============ 通用按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding:14px 26px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  transition:filter .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{background:var(--accent);color:#04150E;}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 22px var(--accent-glow);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border:1px solid var(--line-2);
  color:var(--text);
}
.btn-ghost:hover{border-color:var(--accent);color:#fff;box-shadow:0 0 18px rgba(47,227,155,.14);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:44px;padding:11px 20px;font-size:14px;}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-2);
  border-bottom:1px dashed var(--line-2);
  padding-bottom:2px;
  transition:color .2s ease,border-color .2s ease;
}
.text-link i{transition:transform .2s ease;}
.text-link:hover{color:var(--accent);border-bottom-style:solid;border-bottom-color:var(--accent);}
.text-link:hover i{transform:translateX(4px);}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-2);
  font-size:13px;
  letter-spacing:.04em;
  color:var(--text-2);
  background:rgba(255,255,255,.02);
}
.badge-accent{border-color:rgba(47,227,155,.4);color:var(--accent);}
.badge-warn{border-color:rgba(255,196,107,.42);color:var(--warn);}
.mono{font-family:var(--font-mono);}

/* ============ 首屏 ============ */
.hero{
  position:relative;
  padding:132px 0 var(--section-pad);
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg,rgba(10,13,12,.86) 0%,rgba(10,13,12,.92) 55%,var(--bg) 100%),
    linear-gradient(90deg,rgba(47,227,155,.06) 1px,transparent 1px) 0 0/64px 64px,
    linear-gradient(180deg,rgba(47,227,155,.06) 1px,transparent 1px) 0 0/64px 64px;
  pointer-events:none;
}
.hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:28px;
  font-family:var(--font-mono);
}
.breadcrumb a{color:var(--text-3);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span.sep{opacity:.5;}

.hero-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
  align-items:start;
}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:6fr 6fr;gap:56px;}
}
.hero-title{
  font-size:clamp(36px,5.2vw,68px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero-title em{
  font-style:normal;
  color:var(--accent);
  text-shadow:0 0 26px var(--accent-glow);
}
.hero-sub{
  font-size:17px;
  color:var(--text-2);
  max-width:56ch;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.hero-tags .tag{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--text-3);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:5px 14px;
}

/* 参数面板 */
.panel{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:linear-gradient(180deg,#141A19 0%,#0E1413 100%);
  overflow:hidden;
  box-shadow:0 0 0 1px rgba(47,227,155,.06),0 24px 60px rgba(0,0,0,.45);
}
.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--text-3);
}
.panel-dots{display:flex;gap:6px;}
.panel-dots i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.14);display:block;}
.panel-dots i:first-child{background:var(--accent);box-shadow:0 0 10px var(--accent-glow);}
.panel-body{padding:22px 20px 24px;}
.field-row{margin-bottom:16px;}
.field-label{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--text-3);
  margin-bottom:8px;
}
.field-mock{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  height:52px;
  padding:0 16px;
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  background:var(--bg-2);
  color:var(--text-2);
  font-size:15px;
}
.field-mock .caret{
  width:2px;height:20px;
  background:var(--accent);
  animation:blink 1s steps(1,end) infinite;
}
@keyframes blink{0%,49%{opacity:1;}50%,100%{opacity:0;}}
.code-cells{display:flex;gap:10px;margin:4px 0 18px;}
.code-cells i{
  flex:1;
  height:48px;
  border:1px solid var(--line);
  border-radius:10px;
  background:var(--bg-2);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);
  font-style:normal;
  color:var(--text-3);
  font-size:14px;
}
.code-cells i.filled{color:var(--accent);border-color:rgba(47,227,155,.35);}
.panel-btn{
  width:100%;
  height:48px;
  border-radius:var(--radius-btn);
  background:var(--accent);
  color:#04150E;
  font-weight:700;
  font-size:15px;
  display:flex;align-items:center;justify-content:center;
}
.panel-status{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:16px;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--text-3);
}
.dot-live{
  width:8px;height:8px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent-glow);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}

/* ============ 板块通用 ============ */
.section{padding:var(--section-pad) 0;}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--accent);
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
}
.section-title{
  font-size:clamp(26px,3.2vw,42px);
  font-weight:750;
  line-height:1.2;
  margin-bottom:16px;
}
.section-desc{color:var(--text-2);font-size:16.5px;}

/* ============ 指标条 ============ */
.metrics{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
@media (min-width:768px){.metrics{grid-template-columns:repeat(5,1fr);}}
.metric{
  background:var(--surface);
  padding:26px 22px;
  transition:background .25s ease;
}
.metric:hover{background:var(--surface-2);}
.metric .num{
  font-family:var(--font-mono);
  font-size:clamp(28px,3vw,38px);
  font-weight:700;
  color:var(--accent);
  line-height:1.1;
  letter-spacing:-.02em;
}
.metric .unit{font-size:15px;color:var(--text-3);margin-left:3px;font-family:var(--font-mono);}
.metric .label{
  display:block;
  margin-top:10px;
  font-size:14px;
  color:var(--text-2);
}
.metric .sub{
  display:block;
  margin-top:4px;
  font-size:12.5px;
  color:var(--text-3);
  font-family:var(--font-mono);
}

/* ============ 对照表 ============ */
.table-shell{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:linear-gradient(180deg,#121817 0%,#0E1413 100%);
  overflow:hidden;
}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.spec-table{
  width:100%;
  min-width:820px;
  border-collapse:collapse;
  margin:0;
  background:transparent;
}
.spec-table thead th{
  position:sticky;top:0;
  padding:16px 20px;
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--text-3);
  text-align:left;
  white-space:nowrap;
  background:#141B1A;
  border-bottom:1px solid var(--line-2);
}
.spec-table tbody td{
  padding:18px 20px;
  font-size:15px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
  vertical-align:middle;
}
.spec-table tbody tr:last-child td{border-bottom:none;}
.spec-table tbody tr{transition:background .22s ease;}
.spec-table tbody tr:hover{background:rgba(47,227,155,.045);}
.spec-table td.device{color:var(--text);font-weight:650;white-space:nowrap;}
.spec-table td.num{font-family:var(--font-mono);color:var(--accent);white-space:nowrap;}
.spec-table td.dim{font-family:var(--font-mono);color:var(--text);white-space:nowrap;}
.spec-table td.dim.warn{color:var(--warn);}
.table-note{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:16px 20px;
  border-top:1px solid var(--line);
  font-size:13.5px;
  color:var(--text-3);
  background:rgba(255,255,255,.015);
}
.table-note i{color:var(--accent);margin-top:4px;}
.scroll-hint{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:14px;
  font-size:13px;
  color:var(--text-3);
  font-family:var(--font-mono);
}
@media (min-width:900px){.scroll-hint{display:none;}}

/* ============ 规格卡 2 列错位 ============ */
.spec-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:768px){
  .spec-grid{grid-template-columns:1fr 1fr;gap:24px 28px;}
  .spec-grid .spec-card:nth-child(even){transform:translateY(34px);}
}
.spec-card{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  padding:26px 26px 28px;
  transition:transform .28s ease,border-color .28s ease,background .28s ease;
}
.spec-card::before{
  content:"";
  position:absolute;
  top:-1px;left:22px;right:auto;
  width:56px;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  opacity:0;
  transition:opacity .28s ease;
}
.spec-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-2);
  background:var(--surface-2);
}
.spec-card:hover::before{opacity:1;}
@media (min-width:768px){
  .spec-grid .spec-card:nth-child(even):hover{transform:translateY(30px);}
}
.spec-idx{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--text-3);
  margin-bottom:14px;
}
.spec-card h3{
  font-size:20px;
  font-weight:650;
  margin-bottom:14px;
}
.spec-list li{
  display:flex;
  justify-content:space-between;
  gap:16px;
  padding:10px 0;
  border-bottom:1px solid var(--line);
  font-size:14.5px;
  color:var(--text-2);
}
.spec-list li:last-child{border-bottom:none;padding-bottom:0;}
.spec-list li span:first-child{color:var(--text-3);}
.spec-list li span:last-child{
  font-family:var(--font-mono);
  color:var(--text);
  text-align:right;
  white-space:nowrap;
}
.spec-list li span:last-child.hl{color:var(--accent);}
.spec-list li span:last-child.warn{color:var(--warn);}

/* ============ 图文规范区 ============ */
.split{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  align-items:center;
}
@media (min-width:1024px){
  .split{grid-template-columns:5fr 7fr;gap:56px;}
}
.split-media{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  background:var(--bg-2);
}
.split-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  opacity:.92;
  transition:transform .5s ease;
}
.split-media:hover img{transform:scale(1.03);}
.split-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,13,12,.05),rgba(10,13,12,.55));
  pointer-events:none;
}
.split-caption{
  position:absolute;
  left:18px;bottom:16px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--text-2);
}
.rule-list li{
  display:flex;
  gap:16px;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}
.rule-list li:first-child{padding-top:0;}
.rule-list li:last-child{border-bottom:none;padding-bottom:0;}
.rule-list .rule-idx{
  flex:none;
  width:34px;height:34px;
  border-radius:10px;
  border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--accent);
}
.rule-list h3{font-size:17px;font-weight:650;margin-bottom:6px;}
.rule-list p{font-size:14.5px;color:var(--text-2);margin:0;}

/* ============ 检查清单 ============ */
.check-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:18px;
}
@media (min-width:768px){.check-grid{grid-template-columns:repeat(2,1fr);}}
.check-item{
  display:flex;
  gap:14px;
  padding:22px 24px;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  transition:border-color .25s ease,transform .25s ease;
}
.check-item:hover{border-color:rgba(47,227,155,.3);transform:translateY(-3px);}
.check-item i{
  color:var(--accent);
  font-size:16px;
  margin-top:5px;
}
.check-item h3{font-size:16.5px;font-weight:650;margin-bottom:6px;}
.check-item p{font-size:14.5px;color:var(--text-2);margin:0;}

/* ============ FAQ ============ */
.faq-layout{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
  align-items:start;
}
@media (min-width:1024px){
  .faq-layout{grid-template-columns:4fr 8fr;gap:56px;}
  .faq-aside{position:sticky;top:96px;}
}
.faq-aside .section-title{margin-bottom:14px;}
.faq-aside p{color:var(--text-2);font-size:15.5px;margin-bottom:24px;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  transition:color .2s ease;
  min-height:44px;
}
.faq-q:hover{color:var(--accent);}
.faq-icon{
  flex:none;
  width:30px;height:30px;
  border-radius:50%;
  border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;
  color:var(--text-2);
  transition:transform .24s ease,color .24s ease,border-color .24s ease;
}
.faq-item.is-open .faq-icon{
  transform:rotate(45deg);
  color:var(--accent);
  border-color:rgba(47,227,155,.45);
}
.faq-item.is-open .faq-q{color:var(--accent);}
.faq-a{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows .24s ease;
}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a > div{overflow:hidden;}
.faq-a p{
  max-width:68ch;
  font-size:15px;
  color:var(--text-2);
  padding:0 0 24px;
  margin:0;
}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;
  border:1px solid rgba(47,227,155,.28);
  border-radius:var(--radius-card);
  background:linear-gradient(180deg,#0E1413,#0A0D0C);
  padding:52px 32px;
  text-align:center;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 50% 0%,rgba(47,227,155,.12),transparent 62%),
    linear-gradient(90deg,rgba(47,227,155,.05) 1px,transparent 1px) 0 0/48px 48px,
    linear-gradient(180deg,rgba(47,227,155,.05) 1px,transparent 1px) 0 0/48px 48px;
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:1;}
.cta-band h2{
  font-size:clamp(24px,3vw,36px);
  margin-bottom:14px;
}
.cta-band p{
  color:var(--text-2);
  max-width:60ch;
  margin:0 auto 28px;
  font-size:15.5px;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  justify-content:center;
}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg);
  border-top:1px solid var(--line);
  padding:72px 0 0;
  margin-top:var(--section-pad);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:40px;
  padding-bottom:52px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:repeat(4,1fr);gap:32px;}}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:16px;
  font-weight:700;
  margin-bottom:16px;
}
.footer-desc{
  font-size:14.5px;
  color:var(--text-2);
  margin:0;
  max-width:34ch;
}
.footer-title{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  margin-bottom:18px;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-links a{
  font-size:14.5px;
  color:var(--text-2);
  transition:color .2s ease,transform .2s ease;
  align-self:flex-start;
}
.footer-links a:hover{color:#fff;transform:translateX(2px);}
.footer-contact{display:flex;flex-direction:column;gap:12px;}
.footer-contact li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
}
.footer-contact i{font-size:6px;color:var(--accent);margin-top:8px;flex:none;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  align-items:center;
  padding:22px 0 32px;
  border-top:1px solid var(--line);
  font-size:13.5px;
  color:var(--text-3);
}
@media (max-width:640px){
  .site-footer{padding-top:56px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* ============ 动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .4s ease,transform .4s ease;
}
.reveal.is-visible{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
  .metric:hover,.spec-card:hover,.spec-grid .spec-card:nth-child(even){transform:none;}
}

@media (max-width:767px){
  :root{--section-pad:56px;--gutter:20px;}
  .hero{padding-top:112px;}
  .hero-title{font-size:clamp(30px,8vw,42px);}
  .hero-sub{font-size:16px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;}
  .cta-actions{flex-direction:column;}
  .cta-band{padding:40px 20px;}
  .panel-body{padding:18px 16px 20px;}
}

/* roulang page: category4 */
:root{
  --bg:#0A0D0C;
  --bg-2:#101514;
  --bg-3:#171D1C;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --text:#EDF2F0;
  --text-2:#A7B4B0;
  --text-3:#6E7A77;
  --accent:#2FE39B;
  --accent-soft:rgba(47,227,155,.22);
  --amber:#FFC46B;
  --danger:#FF6B6B;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --sans:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --shadow:0 18px 40px rgba(0,0,0,.45);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-soft);border-radius:6px}

.container,.grid-container{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1440px){
  .container,.grid-container{max-width:1280px}
}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:200;
  height:64px;
  background:rgba(10,13,12,.82);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,155,.55),transparent);
  opacity:0;
  transition:opacity .3s ease;
}
.site-header.is-scrolled::after{opacity:1}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(0,0,0,.45)}

.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:64px;
}

.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:14px;height:14px;border-radius:4px;
  background:linear-gradient(135deg,var(--accent),#1aa877);
  box-shadow:0 0 14px rgba(47,227,155,.5);
  flex:0 0 auto;
}
.logo-text{
  font-size:17px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--text-2);
  white-space:nowrap;
}
.logo-text b{color:var(--text);font-weight:800}

.nav-links{
  display:flex;
  align-items:center;
  gap:24px;
  flex:1 1 auto;
  justify-content:center;
}
.nav-link{
  position:relative;
  font-size:14px;
  color:var(--text-2);
  padding:6px 2px;
  white-space:nowrap;
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s ease;
  box-shadow:0 0 12px var(--accent-soft);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(.55)}
.nav-link.is-active{color:var(--text);font-weight:600;text-shadow:0 0 14px rgba(47,227,155,.35)}
.nav-link.is-active::after{transform:scaleX(1)}

.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 18px;
  border-radius:var(--r-btn);
  background:var(--accent);
  color:#04150E;
  font-size:14px;
  font-weight:700;
  white-space:nowrap;
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease;
}
.nav-cta:hover{background:#41efa9;box-shadow:0 0 22px rgba(47,227,155,.4);transform:translateY(-1px)}
.nav-cta:active{transform:translateY(0)}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line-2);
  border-radius:var(--r-btn);
  background:transparent;
  cursor:pointer;
  position:relative;
  transition:border-color .2s ease;
}
.nav-toggle span{
  position:absolute;
  left:12px;right:12px;
  height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .26s ease,opacity .2s ease,background .2s ease;
}
.nav-toggle span:nth-child(1){top:17px}
.nav-toggle span:nth-child(2){top:25px}
.nav-toggle:hover{border-color:var(--accent)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(4px) rotate(45deg);background:var(--accent)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){transform:translateY(-4px) rotate(-45deg);background:var(--accent)}

/* 移动抽屉 */
.drawer{
  position:fixed;
  inset:64px 0 0 0;
  z-index:190;
  background:#0A0D0C;
  padding:28px 24px 40px;
  transform:translateY(-10px);
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transition:opacity .24s ease,transform .24s ease,visibility .24s;
  overflow-y:auto;
}
.drawer.is-open{opacity:1;visibility:visible;transform:none;pointer-events:auto}
.drawer-link{
  display:flex;
  align-items:center;
  gap:16px;
  padding:16px 4px;
  font-size:20px;
  font-weight:600;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
  min-height:56px;
}
.drawer-link:hover,.drawer-link.is-active{color:var(--text)}
.drawer-link.is-active{color:var(--accent)}
.drawer-idx{
  font-family:var(--mono);
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.08em;
}
.drawer-link.is-active .drawer-idx{color:var(--accent)}
.drawer-cta{margin-top:24px;display:flex}

/* ============ 通用按钮 / 标签 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 26px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:650;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease,color .2s ease;
  min-height:48px;
}
.btn-primary{background:var(--accent);color:#04150E}
.btn-primary:hover{background:#41efa9;box-shadow:0 0 24px rgba(47,227,155,.38);transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.18);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:#fff;box-shadow:0 0 18px rgba(47,227,155,.18)}
.btn:focus-visible{box-shadow:0 0 0 3px var(--accent-soft)}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  color:var(--accent);
  border-bottom:1px dashed rgba(47,227,155,.5);
  padding-bottom:2px;
  transition:border-color .2s ease,gap .2s ease;
}
.link-arrow:hover{border-bottom-style:solid;gap:10px}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--text-2);
  white-space:nowrap;
}
.tag-accent{border-color:rgba(47,227,155,.45);color:var(--accent)}
.tag-amber{border-color:rgba(255,196,107,.45);color:var(--amber)}
.tag-dot{width:5px;height:5px;border-radius:50%;background:currentColor;display:inline-block}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  padding-top:88px;
  font-size:13px;
  color:var(--text-3);
}
.breadcrumb a{color:var(--text-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--text-3)}
.breadcrumb .current{color:var(--text-2)}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  overflow:hidden;
  padding:48px 0 76px;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.3;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(180deg,rgba(10,13,12,.7) 0%,rgba(10,13,12,.92) 70%,var(--bg) 100%),
    repeating-linear-gradient(90deg,rgba(255,255,255,.028) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(0deg,rgba(255,255,255,.028) 0 1px,transparent 1px 72px);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.35fr .85fr;gap:48px;align-items:center}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--accent);
  border:1px solid rgba(47,227,155,.3);
  border-radius:var(--r-pill);
  padding:6px 14px;
  margin-bottom:22px;
}
.hero-title{
  font-size:clamp(34px,4.6vw,58px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.01em;
  margin-bottom:20px;
}
.hero-title em{
  font-style:normal;
  color:var(--accent);
  text-shadow:0 0 26px rgba(47,227,155,.32);
}
.hero-sub{
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
  max-width:60ch;
  margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}

.hero-panel{
  border:1px solid var(--line-2);
  border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(23,29,28,.92),rgba(16,21,20,.92));
  padding:22px;
  box-shadow:var(--shadow);
}
.panel-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
  margin-bottom:16px;
}
.panel-title{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--text-3)}
.panel-status{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--accent);font-family:var(--mono)}
.panel-status i{font-size:8px;animation:blink 1.6s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

.panel-row{margin-bottom:14px}
.panel-label{font-size:12px;color:var(--text-3);font-family:var(--mono);margin-bottom:8px;letter-spacing:.06em}
.panel-field{
  display:flex;
  align-items:center;
  gap:10px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  padding:13px 16px;
  font-family:var(--mono);
  font-size:14px;
  color:var(--text-2);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.panel-field.is-focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.caret{display:inline-block;width:1px;height:16px;background:var(--accent);animation:caret 1s steps(1) infinite}
@keyframes caret{0%,49%{opacity:1}50%,100%{opacity:0}}
.panel-code{display:flex;gap:10px}
.code-cell{
  flex:1 1 0;
  height:44px;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  font-family:var(--mono);
  font-size:16px;
  color:var(--text);
}
.code-cell.is-filled{border-color:rgba(47,227,155,.5);color:var(--accent)}
.panel-btn{
  width:100%;
  margin-top:6px;
  padding:14px;
  border-radius:var(--r-btn);
  background:var(--accent);
  color:#04150E;
  font-weight:700;
  font-size:15px;
  text-align:center;
  border:none;
}
.panel-note{margin-top:12px;font-size:12px;color:var(--text-3);font-family:var(--mono);line-height:1.7}
.panel-note b{color:var(--danger);font-weight:600}

/* ============ 板块通用 ============ */
.section{padding:76px 0;position:relative}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--accent);
  margin-bottom:14px;
}
.section-title{
  font-size:clamp(25px,3vw,38px);
  font-weight:750;
  line-height:1.22;
  letter-spacing:-.005em;
  margin-bottom:14px;
}
.section-desc{color:var(--text-2);font-size:16px;line-height:1.9}

/* ============ 速判卡片墙 ============ */
.quick-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.quick-card{
  position:relative;
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 24px 24px;
  transition:transform .24s ease,border-color .24s ease,background .24s ease;
  overflow:hidden;
}
.quick-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,155,.75),transparent);
  opacity:0;
  transition:opacity .24s ease;
}
.quick-card:hover{transform:translateY(-4px);border-color:var(--line-2);background:#1B2221}
.quick-card:hover::before{opacity:1}
.quick-idx{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--accent);
  display:block;
  margin-bottom:14px;
}
.quick-q{font-size:17px;font-weight:650;line-height:1.5;margin-bottom:10px}
.quick-a{font-size:14.5px;color:var(--text-2);line-height:1.8;margin-bottom:16px}

/* ============ 场景卡片墙 ============ */
.grid-x{max-width:100%}
.scene-grid{margin-left:-12px;margin-right:-12px}
.scene-grid > .cell{padding-left:12px;padding-right:12px;margin-bottom:24px}
.scene-card{
  display:flex;
  flex-direction:column;
  height:100%;
  background:var(--bg-3);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .24s ease,border-color .24s ease;
}
.scene-card:hover{transform:translateY(-4px);border-color:rgba(47,227,155,.32)}
.scene-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-2)}
.scene-media img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:opacity .3s ease,transform .4s ease}
.scene-card:hover .scene-media img{opacity:1;transform:scale(1.03)}
.scene-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,13,12,.1) 40%,rgba(17,22,21,.92) 100%);
}
.scene-badge{position:absolute;top:14px;left:14px;z-index:2}
.scene-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.scene-title{font-size:19px;font-weight:680;line-height:1.45}
.scene-text{font-size:14.5px;color:var(--text-2);line-height:1.85}
.scene-list{display:flex;flex-direction:column;gap:8px;margin-top:4px}
.scene-list li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.75;
}
.scene-list li::before{
  content:"";
  flex:0 0 auto;
  width:6px;height:6px;
  margin-top:10px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent-soft);
}

/* ============ 手风琴 ============ */
.faq-wrap{display:grid;grid-template-columns:.85fr 1.6fr;gap:48px;align-items:start}
.faq-aside{position:sticky;top:96px}
.faq-aside-card{
  margin-top:22px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--bg-3);
  padding:22px;
}
.faq-aside-card p{font-size:14px;color:var(--text-2);line-height:1.85;margin-bottom:14px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 4px;
  background:transparent;
  border:none;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  cursor:pointer;
  min-height:56px;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--accent)}
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:30px;height:30px;
  border:1px solid var(--line-2);
  border-radius:50%;
  transition:transform .24s ease,border-color .24s ease,background .24s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  top:50%;left:50%;
  background:var(--text-2);
  transition:background .2s ease,opacity .2s ease;
}
.faq-icon::before{width:11px;height:1.5px;transform:translate(-50%,-50%)}
.faq-icon::after{width:1.5px;height:11px;transform:translate(-50%,-50%)}
.faq-item.is-open .faq-q{color:var(--text)}
.faq-item.is-open .faq-icon{transform:rotate(45deg);border-color:var(--accent);background:rgba(47,227,155,.08)}
.faq-item.is-open .faq-icon::before,
.faq-item.is-open .faq-icon::after{background:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{padding:0 4px 26px;max-width:68ch}
.faq-a-inner p{font-size:15.5px;color:var(--text-2);line-height:1.9}
.faq-a-inner p + p{margin-top:14px}
.faq-a-inner strong{color:var(--text);font-weight:650}

/* ============ 排查步骤 ============ */
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;counter-reset:flow}
.flow-item{
  position:relative;
  padding:26px 22px 24px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(23,29,28,.9),rgba(16,21,20,.9));
  transition:border-color .24s ease,transform .24s ease;
}
.flow-item:hover{border-color:rgba(47,227,155,.32);transform:translateY(-4px)}
.flow-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid rgba(47,227,155,.4);
  color:var(--accent);
  font-family:var(--mono);
  font-size:14px;
  margin-bottom:16px;
  box-shadow:0 0 16px rgba(47,227,155,.14) inset;
}
.flow-title{font-size:17px;font-weight:650;margin-bottom:8px}
.flow-text{font-size:14.5px;color:var(--text-2);line-height:1.8}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;
  margin:0 auto 0;
  padding:0;
}
.cta-inner{
  position:relative;
  border:1px solid rgba(47,227,155,.35);
  border-radius:20px;
  background:
    radial-gradient(120% 160% at 12% 0%,rgba(47,227,155,.12),transparent 60%),
    linear-gradient(180deg,rgba(16,21,20,.96),rgba(10,13,12,.96));
  padding:48px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  flex-wrap:wrap;
  overflow:hidden;
}
.cta-inner::after{
  content:"";
  position:absolute;
  inset:0;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.025) 0 1px,transparent 1px 56px);
  pointer-events:none;
}
.cta-copy{position:relative;z-index:2;max-width:62ch}
.cta-title{font-size:clamp(22px,2.4vw,30px);font-weight:750;line-height:1.3;margin-bottom:12px}
.cta-text{font-size:15.5px;color:var(--text-2);line-height:1.85}
.cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--bg);
  border-top:1px solid var(--line);
  padding:72px 0 0;
  margin-top:84px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.footer-desc{font-size:14.5px;color:var(--text-2);line-height:1.85;max-width:34ch}
.footer-title{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.1em;
  color:var(--text-3);
  margin-bottom:18px;
}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{
  font-size:14.5px;
  color:var(--text-2);
  transition:color .2s ease,transform .2s ease;
  width:fit-content;
}
.footer-links a:hover{color:var(--text);transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact li{
  display:flex;
  gap:10px;
  font-size:14px;
  color:var(--text-2);
  line-height:1.75;
}
.footer-contact i{font-size:6px;color:var(--accent);margin-top:10px;flex:0 0 auto}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-3);
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero-panel{max-width:520px}
  .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-wrap{grid-template-columns:1fr;gap:30px}
  .faq-aside{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:639px){
  body{font-size:16px}
  .container,.grid-container{padding-left:20px;padding-right:20px}
  .breadcrumb{padding-top:80px}
  .page-hero{padding:32px 0 56px}
  .section{padding:56px 0}
  .hero-title{font-size:clamp(29px,7.2vw,38px)}
  .hero-sub{font-size:16px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .quick-grid{grid-template-columns:1fr;gap:16px}
  .flow-grid{grid-template-columns:1fr}
  .scene-grid > .cell{padding-left:12px;padding-right:12px}
  .cta-inner{padding:32px 22px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .nav-cta{display:none}
  .faq-q{font-size:16px;padding:20px 2px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  .quick-card:hover,.scene-card:hover,.flow-item:hover{transform:none}
}