/* ============================================================
   白泽官网样式
   1 令牌 · 2 基础 · 3 排版 · 4 组件 · 5 区块 · 6 响应式与动效
   不外链字体，不引第三方样式
   ============================================================ */

/* ---------- 1 令牌 ---------- */
:root{
  --ink:#0a0a0a;
  --panel:#111214;
  --panel-2:#0b0c0f;
  --gold:#f5c542;
  --gold-deep:#e0ad25;
  --text:#e8e8e8;
  --muted:#8b8f96;
  --faint:#5f646c;
  --ok:#5ac878;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --gold-line:rgba(245,197,66,.24);
  --gold-soft:rgba(245,197,66,.08);
  --radius:12px;
  --radius-sm:9px;
  --container:1200px;
  --gutter:28px;
  --section-gap:clamp(44px,4.6vw,68px);
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 2 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ink);color:var(--text);
  font-family:var(--sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),
                   linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;opacity:.5;
  -webkit-mask-image:radial-gradient(circle at 50% 18%,black,transparent 72%);
  mask-image:radial-gradient(circle at 50% 18%,black,transparent 72%);
}
h1,h2,h3{margin:0;letter-spacing:.01em}
p{margin:0}
a{color:inherit;text-decoration:none}
code{font-family:var(--mono)}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:4px}
.wrap{position:relative;z-index:1;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.wrap-narrow{max-width:820px}
.skip{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--gold);color:#1a1508;font-weight:600;
  padding:10px 16px;border-radius:0 0 8px 0;
}
.skip:focus{left:0}

/* ---------- 3 排版 ---------- */
.eyebrow{font:600 11px/1 var(--mono);letter-spacing:.3em;color:var(--gold);margin-bottom:16px}
h1{font-size:clamp(2rem,4.4vw,2.75rem);line-height:1.14;font-weight:800}
h1 span{
  background:linear-gradient(180deg,#fff 10%,rgba(245,197,66,.92) 120%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lead{margin-top:16px;font-size:15.5px;line-height:1.9;color:#b9bdc4;max-width:34em}
.lead code{font-size:12.5px;color:var(--gold);background:var(--gold-soft);padding:2px 6px;border-radius:4px;white-space:nowrap}
h2{font-size:clamp(1.5rem,2.6vw,2rem);font-weight:700;line-height:1.3}
.section-sub{margin-top:10px;color:var(--muted);font-size:14.5px}
/* ---------- 4 组件 ---------- */

/* 4.1 按钮 */
.btn{
  display:inline-flex;align-items:center;gap:7px;padding:11px 19px;
  border:1px solid transparent;border-radius:var(--radius-sm);
  font:600 13.5px/1 var(--sans);cursor:pointer;
  transition:transform .12s ease,box-shadow .12s ease,background .12s ease;
}
.btn-primary{background:linear-gradient(180deg,#f7cf5e,var(--gold-deep));color:#1a1508;box-shadow:0 0 26px rgba(245,197,66,.3)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 34px rgba(245,197,66,.45)}
.btn-ghost{border-color:rgba(245,197,66,.42);color:var(--gold);background:var(--gold-soft)}
.btn-ghost:hover{background:rgba(245,197,66,.14)}
.cta-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}

/* 4.2 命令块与复制 */
.cmd{
  display:flex;align-items:center;gap:10px;margin-top:14px;max-width:470px;
  padding:10px 12px;border:1px solid rgba(245,197,66,.2);
  background:#0c0d10;border-radius:8px;
}
.cmd code{flex:1;min-width:0;font-size:12px;line-height:1.5;color:#d7dae0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cmd-sign{color:var(--gold)}
.copy{
  flex:none;font:500 10.5px/1 var(--mono);color:var(--gold);
  background:none;border:1px solid rgba(245,197,66,.35);border-radius:5px;
  padding:6px 9px;cursor:pointer;transition:background .12s ease,color .12s ease;
}
.copy:hover{background:var(--gold-soft)}
.copy.is-done{color:#1a1508;background:var(--gold);border-color:var(--gold)}
.cmd-note{margin-top:8px;font:10.5px/1.6 var(--mono);color:var(--faint);letter-spacing:.06em}

/* 4.3 卡片 */
.card{
  padding:18px 19px;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
}
.card h3{font:600 15px/1.4 var(--sans);color:#e8e8e8;margin-bottom:8px}
.card h3::before{
  content:"";display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 10px var(--gold);margin-right:8px;vertical-align:2px;
}
.card p{font-size:13.5px;line-height:1.8;color:#a8adb5}

/* 4.4 终端窗 */
.term{
  border:1px solid var(--gold-line);border-radius:var(--radius);
  background:var(--panel-2);box-shadow:0 0 46px rgba(245,197,66,.14);overflow:hidden;
}
.term-bar{display:flex;align-items:center;gap:6px;padding:10px 13px;border-bottom:1px solid rgba(255,255,255,.06)}
.term-bar i{width:7px;height:7px;border-radius:50%;background:#ff5f57}
.term-bar i:nth-child(2){background:#febc2e}
.term-bar i:nth-child(3){background:#28c840}
.term-title{margin-left:8px;font:10px/1 var(--mono);color:var(--faint);letter-spacing:.16em}
.term-body{padding:14px 15px;font:12px/1.95 var(--mono)}
.line{color:#d7dae0;min-height:1.95em}
.l-prompt{color:#9aa0a8}
.l-prompt::before{content:"\203A  ";color:var(--gold)}
.l-ok{color:var(--ok)}
.l-ok::before{content:"\2713  "}
.l-dim{color:var(--muted);padding-left:14px}
.l-arrow{color:#c9ced6}
.l-arrow::before{content:"\2192  ";color:var(--muted)}
.l-brand::before{content:"白泽 ";color:var(--gold)}
.term-note{margin-top:8px;text-align:right;font:10.5px/1.7 var(--mono);color:var(--faint)}
.term-wide{max-width:820px}

/* 4.5 问答 */
.faq{
  border:1px solid var(--line);border-radius:var(--radius-sm);
  background:rgba(255,255,255,.02);margin-top:10px;padding:0 16px;
}
.faq summary{
  cursor:pointer;padding:14px 0;font:600 14.5px/1.5 var(--sans);color:#e8e8e8;
  list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold);font:400 18px/1 var(--mono)}
.faq[open] summary::after{content:"\2212"}
.faq p{padding-bottom:16px;font-size:13.5px;line-height:1.85;color:#a8adb5}

/* 4.6 语言钮与移动导航 */
.lang{
  font:600 10.5px/1 var(--mono);letter-spacing:.14em;color:var(--gold);
  background:none;border:1px solid rgba(245,197,66,.3);border-radius:5px;
  padding:6px 9px;cursor:pointer;
}
.lang:hover{background:var(--gold-soft)}
.nav-mobile{display:none}
.nav-mobile summary{
  list-style:none;cursor:pointer;font:600 12px/1 var(--sans);color:var(--muted);
  padding:7px 10px;border:1px solid var(--line-strong);border-radius:6px;
}
.nav-mobile summary::-webkit-details-marker{display:none}
.nav-mobile nav{
  position:absolute;right:var(--gutter);top:62px;z-index:20;
  display:none;flex-direction:column;gap:2px;min-width:150px;padding:8px;
  background:#0e0f12;border:1px solid var(--line-strong);border-radius:10px;
  box-shadow:0 18px 40px rgba(0,0,0,.6);
}
.nav-mobile[open] nav{display:flex}
.nav-mobile nav a{padding:9px 12px;border-radius:6px;font-size:13.5px;color:#c9ced6}
.nav-mobile nav a:hover{background:rgba(255,255,255,.06);color:var(--gold)}

/* 4.7 字标与小钮 */
.brand{display:inline-flex;align-items:baseline;gap:9px}
.brand-mark{
  width:9px;height:9px;border-radius:50%;align-self:center;
  background:radial-gradient(circle at 35% 30%,#f7cf5e,#c9962a);
  box-shadow:0 0 12px rgba(245,197,66,.7);
}
.brand-zh{font:700 15px/1 var(--sans);color:#f0f0f0;letter-spacing:.12em}
.brand-en{font:500 9.5px/1 var(--mono);color:var(--faint);letter-spacing:.3em}
.repo-mini{
  font:500 10.5px/1 var(--mono);letter-spacing:.14em;color:var(--muted);
  border:1px solid var(--line-strong);border-radius:5px;padding:6px 9px;
}
.repo-mini:hover{color:var(--gold);border-color:rgba(245,197,66,.35)}
/* ---------- 5 区块 ---------- */

/* 5.1 吸顶头 */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(10,10,10,.55);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background .2s ease,border-color .2s ease;
}
.site-header.is-stuck{background:rgba(10,10,10,.9);border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.nav-desktop{display:flex;gap:22px;font-size:13px;color:var(--muted)}
.nav-desktop a{transition:color .12s ease}
.nav-desktop a:hover{color:var(--gold)}
.header-actions{display:flex;align-items:center;gap:9px}

/* 5.2 首屏 */
.hero{padding-block:clamp(36px,6vw,84px) clamp(48px,7vw,96px)}
.hero-grid{display:grid;grid-template-columns:1.02fr 1fr;gap:clamp(24px,4vw,48px);align-items:center}
.hero-copy{min-width:0}
.hero-term{min-width:0}

/* 5.3 小节与栅格 */
.section{padding-block:var(--section-gap);position:relative;z-index:1}
/* 节间金线与菱形节点，使留白成为结构而非空洞 */
.section::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(245,197,66,.14) 20%,rgba(245,197,66,.32) 50%,rgba(245,197,66,.14) 80%,transparent);
}
.section::after{
  content:"";position:absolute;left:50%;top:0;width:8px;height:8px;margin:-4px 0 0 -4px;
  border:1px solid rgba(245,197,66,.42);background:var(--ink);transform:rotate(45deg);
  pointer-events:none;
}
/* 交替极淡金光，增加层次 */
.section:nth-of-type(even){
  background:radial-gradient(120% 74% at 50% 0%,rgba(245,197,66,.038),transparent 64%);
}
/* 指标带 */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  list-style:none;margin:26px 0 0;padding:0;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--line);
}
.metrics > li{
  min-width:0;padding:16px 12px;text-align:center;
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.012));
}
.metrics b{display:block;font:600 21px/1.15 var(--mono);color:var(--gold);letter-spacing:.02em}
.metrics span{display:block;margin-top:5px;font-size:12.5px;line-height:1.5;color:var(--muted)}
.section > .wrap > h2 + .section-sub + *{margin-top:28px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid-3 > *{min-width:0}
.steps{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;
  list-style:none;margin:0;padding:0;
}
.steps > li{min-width:0}
.step{
  min-width:0;
  padding:18px 19px;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.015));
}
.step h3{font:600 14.5px/1.4 var(--sans);color:#e8e8e8;margin-bottom:7px}
.step p{font-size:13.5px;line-height:1.8;color:#a8adb5}
.step .cmd{max-width:none}

/* 5.4 页脚 */
.site-footer{border-top:1px solid var(--line);padding-block:44px 56px;position:relative;z-index:1}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}
.footer-brand{display:inline-flex;align-items:baseline;gap:9px}
.footer-links{display:flex;gap:18px;font-size:13px;color:var(--muted);flex-wrap:wrap;justify-content:center}
.footer-links a:hover{color:var(--gold)}
.footer-tagline{font-size:13.5px;color:#b9bdc4;letter-spacing:.06em}
.footer-rights{font:10.5px/1.6 var(--mono);color:var(--faint);letter-spacing:.08em}

/* ---------- 6 响应式与动效 ---------- */

/* 6.1 入场与光标 */
.reveal{opacity:1;transform:none}
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .45s ease-out,transform .45s ease-out}
.js .reveal.is-in{opacity:1;transform:none}
.cursor{display:inline-block;width:6px;height:13px;margin-left:2px;vertical-align:-2px;background:var(--gold);animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* 6.2 平板 */
@media (max-width:900px){
  :root{--gutter:20px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .nav-desktop{display:none}
  .nav-mobile{display:block}
  .grid-3,.steps{grid-template-columns:1fr 1fr}
  h1{font-size:clamp(1.9rem,6vw,2.4rem)}
}

/* 6.3 手机 */
@media (max-width:560px){
  .grid-3,.steps{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr 1fr}
  .repo-mini{display:none}
  .cmd code{font-size:11px}
  .term-body{font-size:11px}
  .footer-links{gap:14px;font-size:12px}
}

/* 6.4 减弱动效 */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.js .reveal{opacity:1;transform:none;transition:none}
  .cursor{animation:none}
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}

/* 7 工具类 */
.scroll-sentinel{position:absolute;top:80px;left:0;width:1px;height:1px;pointer-events:none}
.visually-hidden{position:fixed;left:-9999px;top:0;width:1px;height:1px;overflow:hidden}

/* 8 404 页 */
.notfound{padding-block:clamp(72px,12vw,140px)}
.notfound h1{font-size:clamp(1.8rem,5vw,2.6rem)}