/* CyanCodex 官网 (沧蓝工坊) — 深色玻璃风格, 零依赖 */
:root{
  --bg:#0B1512; --bg2:#0E1B16; --card:rgba(20,38,31,.62); --card2:rgba(255,255,255,.04);
  --line:rgba(74,222,128,.16); --txt:#E7F3EC; --dim:#9DB4A5;
  --accent:#4ADE80; --accent2:#22C55E; --accent3:#38BDF8;
  --shadow:0 18px 50px rgba(0,0,0,.35);
  --radius:16px;
}
html[data-theme="light"]{
  --bg:#F4F8F6; --bg2:#FFFFFF; --card:rgba(255,255,255,.86); --card2:rgba(15,23,42,.03);
  --line:rgba(14,122,61,.18); --txt:#0F1F1A; --dim:#5B7268;
  --shadow:0 18px 50px rgba(15,42,30,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--txt); line-height:1.7;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  overflow-x:hidden;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:none;opacity:.9}
code{font-family:ui-monospace,Consolas,Menlo,monospace;font-size:.92em;background:var(--card2);padding:1px 6px;border-radius:6px}
.grad{background:linear-gradient(120deg,var(--accent),var(--accent3));-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--dim)}
.small{font-size:12.5px}
.center{text-align:center}
.bg-glow{position:fixed;border-radius:50%;filter:blur(110px);opacity:.28;pointer-events:none;z-index:0}
.g1{width:520px;height:520px;background:#16A34A;top:-160px;left:-120px}
.g2{width:420px;height:420px;background:#0EA5E9;bottom:-160px;right:-100px;opacity:.16}
.g3{width:360px;height:360px;background:#22C55E;top:38%;left:55%;opacity:.10}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;
  border:1px solid var(--line);background:var(--card2);color:var(--txt);font-size:15px;cursor:pointer;transition:.2s;font-weight:500}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent2),var(--accent));color:#04140C;font-weight:700;border-color:transparent;box-shadow:0 8px 26px rgba(34,197,94,.28)}
.btn.ghost{background:transparent}
.btn.small{padding:8px 16px;font-size:13.5px;border-radius:10px}
.icon-btn{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  background:var(--card2);color:var(--txt);cursor:pointer}
.icon-btn svg{width:19px;height:19px}
.menu-btn{display:none}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:color-mix(in srgb,var(--bg) 82%,transparent);
  border-bottom:1px solid transparent;transition:.25s}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(0,0,0,.18)}
.nav-inner{max-width:1180px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;color:var(--txt)}
.brand img{width:38px;height:38px;border-radius:11px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16px}
.brand-text i{font-style:normal;font-size:11.5px;color:var(--dim)}
.nav-links{display:flex;gap:22px;margin-left:auto;font-size:14.5px}
.nav-links a{color:var(--txt);opacity:.82}
.nav-links a:hover{opacity:1;color:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:10px}

/* 首屏 */
.hero{position:relative;z-index:1;padding:64px 20px 40px}
.hero-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.pill{display:inline-block;padding:5px 14px;border-radius:20px;border:1px solid var(--line);background:var(--card2);
  font-size:12.5px;color:var(--accent);margin-bottom:16px}
.hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.22;margin:0 0 16px;font-weight:800;letter-spacing:-.5px}
.hero-sub{color:var(--dim);font-size:15.5px;max-width:560px}
.hero-sub b{color:var(--txt)}
.hero-actions{display:flex;gap:12px;margin:26px 0 14px;flex-wrap:wrap}
.hero-meta{font-size:13px;color:var(--dim)}
.scroll-hint{text-align:center;color:var(--dim);font-size:12.5px;padding:26px 0 6px;animation:float 2.6s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(6px)}}

/* 手机预览 */
.phone-wrap{position:relative;display:grid;place-items:center}
.phone{position:relative;width:284px;height:568px;border-radius:38px;background:linear-gradient(160deg,#182722,#0E1B16);
  border:1px solid var(--line);box-shadow:var(--shadow);padding:12px}
html[data-theme="light"] .phone{background:linear-gradient(160deg,#0E1B16,#12332A)}
.phone-notch{position:absolute;top:12px;left:50%;transform:translateX(-50%);width:96px;height:18px;border-radius:0 0 14px 14px;background:#0B1512;z-index:2}
.phone-screen{width:100%;height:100%;border-radius:28px;background:linear-gradient(180deg,#0B1512,#0F2A21);overflow:hidden;
  display:flex;flex-direction:column;color:#E7F3EC}
.app-bar{display:flex;align-items:center;gap:8px;padding:26px 12px 10px;font-size:12.5px;font-weight:600}
.app-bar img{width:20px;height:20px;border-radius:6px}
.app-bar-right{margin-left:auto;font-size:10.5px;color:#9DB4A5}
.app-body{flex:1;padding:6px 10px;display:flex;flex-direction:column;gap:8px;overflow:hidden}
.app-card{border-radius:12px;padding:10px 12px;background:rgba(74,222,128,.14);border:1px solid rgba(74,222,128,.3)}
.app-card-title{font-size:13px;font-weight:700;color:#4ADE80}
.app-card-desc{font-size:10.5px;color:#9DB4A5}
.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.app-mini{font-size:10.5px;padding:8px;border-radius:10px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07);text-align:center}
.app-chat{margin-top:auto;display:flex;flex-direction:column;gap:6px;padding-bottom:8px}
.bubble{max-width:88%;font-size:10.5px;padding:7px 10px;border-radius:12px;line-height:1.5}
.bubble.left{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.08)}
.bubble.right{align-self:flex-end;background:rgba(74,222,128,.16);border:1px solid rgba(74,222,128,.32)}
.app-tabbar{display:flex;justify-content:space-around;padding:8px 4px 14px;font-size:9.5px;color:#9DB4A5;border-top:1px solid rgba(255,255,255,.06)}
.app-tabbar .on{color:#4ADE80}
.phone-glow{position:absolute;inset:auto 0 0 0;height:60%;background:radial-gradient(60% 60% at 50% 100%,rgba(34,197,94,.28),transparent 70%);filter:blur(30px);z-index:-1}

/* 区块 */
.section{position:relative;z-index:1;max-width:1180px;margin:0 auto;padding:72px 20px}
.section.alt{max-width:none;background:color-mix(in srgb,var(--bg2) 70%,transparent);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.alt > *{max-width:1180px;margin-left:auto;margin-right:auto}
.section-head{text-align:center;margin-bottom:38px}
.section-head h2{font-size:clamp(24px,3vw,34px);margin:0 0 8px;font-weight:800}
.section-head p{color:var(--dim);margin:0;font-size:15px}
.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}
.two{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.three{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;backdrop-filter:blur(10px);
  box-shadow:var(--shadow);transition:.25s}
.card:hover{transform:translateY(-3px);border-color:rgba(74,222,128,.42)}
.card h3{margin:12px 0 8px;font-size:17px}
.card p{margin:0;color:var(--dim);font-size:14px}
.card-ico{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-weight:800;
  color:#04140C;background:var(--c,#4ADE80);box-shadow:0 8px 22px color-mix(in srgb,var(--c,#4ADE80) 35%,transparent)}
pre.code{background:rgba(0,0,0,.34);border:1px solid var(--line);border-radius:12px;padding:14px;overflow:auto;
  font-family:ui-monospace,Consolas,Menlo,monospace;font-size:12.5px;line-height:1.65;color:#CFF3DD;white-space:pre;margin:12px 0 0}
pre.code.small{font-size:11.5px}
html[data-theme="light"] pre.code{background:rgba(15,42,30,.06);color:#12402F}

/* 生成器 tabs */
.tabs{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;backdrop-filter:blur(10px);box-shadow:var(--shadow)}
.tab-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.tab{padding:9px 16px;border-radius:10px;border:1px solid var(--line);background:transparent;color:var(--dim);cursor:pointer;font-size:14px}
.tab.on{background:linear-gradient(135deg,var(--accent2),var(--accent));color:#04140C;font-weight:700;border-color:transparent}
.panel{display:none}
.panel.on{display:block;animation:fade .25s ease}
.panel h3{margin:0 0 6px;font-size:17px}
.panel p{color:var(--dim);margin:0;font-size:14px}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* API 区 */
.api-wrap{display:grid;grid-template-columns:1fr 1.05fr;gap:26px;align-items:start}
.ticks{list-style:none;padding:0;margin:0 0 20px}
.ticks li{position:relative;padding-left:26px;margin-bottom:12px;color:var(--dim);font-size:14.5px}
.ticks li::before{content:"✓";position:absolute;left:0;top:0;color:var(--accent);font-weight:800}
.ticks b{color:var(--txt)}
.api-code .code-head{font-size:12.5px;color:var(--accent);margin-bottom:-4px}

/* 时间线 */
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--accent),transparent)}
.tl-item{position:relative;margin-bottom:22px}
.tl-dot{position:absolute;left:-24px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 22%,transparent)}
.tl-body{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px;backdrop-filter:blur(10px)}
.tl-head{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.tl-head b{font-size:16px}
.tl-tag{font-size:11.5px;padding:2px 9px;border-radius:20px;background:color-mix(in srgb,var(--accent) 18%,transparent);color:var(--accent)}
.tl-body p{margin:2px 0;color:var(--dim);font-size:13.5px}

/* 下载 */
.dl-card{display:flex;flex-direction:column;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 20px;backdrop-filter:blur(10px);box-shadow:var(--shadow);color:var(--txt);transition:.25s;text-align:center}
.dl-card:hover{transform:translateY(-3px);border-color:rgba(74,222,128,.42)}
.dl-card.disabled{opacity:.62;cursor:not-allowed}
.dl-ico{font-size:30px}
.dl-card h3{margin:0;font-size:18px}
.dl-ver{margin:0;color:var(--dim);font-size:13px}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:10px;max-width:860px;margin:0 auto}
details{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 18px;backdrop-filter:blur(10px)}
details summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";float:right;color:var(--accent);font-weight:800}
details[open] summary::after{content:"−"}
details p{margin:10px 0 0;color:var(--dim);font-size:14px}

/* 页脚 */
.foot{position:relative;z-index:1;border-top:1px solid var(--line);padding:34px 20px 26px;margin-top:20px}
.foot-inner{max-width:1180px;margin:0 auto;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.foot-brand{display:flex;align-items:center;gap:12px}
.foot-brand img{width:44px;height:44px;border-radius:12px}
.foot-brand b{font-size:15px}
.foot-brand p{margin:0}
.foot-links{display:flex;gap:16px;flex-wrap:wrap;font-size:14px}
.foot-links a{color:var(--dim)}
.foot-links a:hover{color:var(--accent)}

/* 法律文档页 (隐私政策 / 用户协议) */
.doc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 26px 10px;
  backdrop-filter:blur(10px);box-shadow:var(--shadow);margin-top:18px}
.doc h3{font-size:16px;margin:22px 0 8px;color:var(--accent)}
.doc h3:first-child{margin-top:0}
.doc p,.doc li{color:var(--dim);font-size:14.5px;line-height:1.85}
.doc b{color:var(--txt)}
.doc ul{padding-left:20px;margin:8px 0}
.doc a{color:var(--accent3)}

/* 回到顶部 */
.back-top{position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent2),var(--accent));color:#04140C;font-weight:800;box-shadow:var(--shadow);
  opacity:0;pointer-events:none;transition:.25s;z-index:60}
.back-top.on{opacity:1;pointer-events:auto}

/* 滚动出现 */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}

@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:28px}
  .phone-wrap{order:-1}
  .api-wrap{grid-template-columns:1fr}
  .nav-links{position:fixed;left:0;right:0;top:62px;flex-direction:column;gap:0;background:var(--bg2);border-bottom:1px solid var(--line);
    padding:8px 20px;display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 0;border-bottom:1px solid var(--line)}
  .menu-btn{display:grid}
}