/* =========================================================
   CoWorkAI · Grok中转站  样式表
   纯 CSS，无任何 JavaScript 依赖
   ========================================================= */

:root{
  --bg:#070912;
  --bg-soft:#0B0E1A;
  --bg-card:rgba(255,255,255,.035);
  --bg-card-hover:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);

  --text:#E9ECF5;
  --text-mid:#A7AFC4;
  --text-dim:#727C96;

  --c1:#6EE7F9;   /* 青 */
  --c2:#7C6BFF;   /* 紫 */
  --c3:#C46BFF;   /* 品红 */
  --grad:linear-gradient(120deg,var(--c1),var(--c2) 52%,var(--c3));
  /* 按钮专用：整体提亮，保证其上的深色文字对比度达标 */
  --grad-btn:linear-gradient(120deg,#8DF0FF,#A99BFF 52%,#DC9DFF);

  --radius:18px;
  --radius-sm:12px;
  --maxw:1200px;
  --shadow:0 24px 60px -24px rgba(0,0,0,.85);
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",
         -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  --mono:"JetBrains Mono","Fira Code",SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
code{font-family:var(--mono);font-size:.9em}

/* 全局背景纹理：细网格 + 顶部光晕 */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1100px 620px at 50% -12%,rgba(124,107,255,.20),transparent 62%),
    radial-gradient(760px 460px at 88% 8%,rgba(196,107,255,.13),transparent 60%),
    radial-gradient(680px 420px at 6% 22%,rgba(110,231,249,.10),transparent 60%),
    var(--bg);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 0%,#000 0%,transparent 78%);
}

.container{width:min(100% - 40px,var(--maxw));margin-inline:auto}
.container-narrow{width:min(100% - 40px,880px)}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c2);color:#fff;padding:10px 18px;z-index:999;border-radius:0 0 10px 0}
.skip-link:focus{left:0}
:focus-visible{outline:2px solid var(--c1);outline-offset:3px;border-radius:6px}

/* ===================== 顶部导航 ===================== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(7,9,18,.72);
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{filter:drop-shadow(0 4px 14px rgba(124,107,255,.45));transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.brand:hover .brand-mark{transform:rotate(-8deg) scale(1.06)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:17px;letter-spacing:.4px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.brand-text small{font-size:11.5px;color:var(--text-dim);letter-spacing:1.6px}

.site-nav{display:flex;align-items:center;gap:6px}
.site-nav a{
  padding:8px 13px;border-radius:10px;font-size:14.5px;color:var(--text-mid);
  transition:color .22s,background .22s;
}
.site-nav a:hover{color:var(--text);background:rgba(255,255,255,.06)}
/* checkbox 用「视觉隐藏」而非 display:none，保证键盘仍可 Tab 聚焦切换菜单 */
.nav-toggle{position:absolute;width:1px;height:1px;opacity:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0)}
.nav-burger{display:none}

/* ===================== 按钮 ===================== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:999px;font-size:15.5px;font-weight:700;
  white-space:nowrap;transition:transform .22s,box-shadow .28s,background .25s,border-color .25s;
}
.btn-primary{
  background:var(--grad-btn);color:#06070F;
  box-shadow:0 10px 30px -8px rgba(124,107,255,.62);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 42px -10px rgba(124,107,255,.85)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--text);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--c1);background:rgba(110,231,249,.09);transform:translateY(-2px)}
/* 注意：选择器需带 .site-nav 前缀，否则特异性低于 .site-nav a 会被其 color 覆盖 */
.site-nav a.btn-nav{padding:9px 20px;font-size:14px;margin-left:8px;background:var(--grad-btn);color:#06070F}
.site-nav a.btn-nav:hover{transform:translateY(-1px);box-shadow:0 8px 22px -8px rgba(124,107,255,.7);color:#06070F}

/* ===================== Hero ===================== */
.hero{position:relative;padding:clamp(64px,10vw,124px) 0 clamp(56px,8vw,96px);overflow:hidden}
.glow{position:absolute;border-radius:50%;filter:blur(110px);pointer-events:none;z-index:0}
.glow-a{width:520px;height:520px;background:rgba(124,107,255,.26);top:-160px;left:-120px}
.glow-b{width:460px;height:460px;background:rgba(110,231,249,.16);bottom:-180px;right:-100px}
.hero-inner{position:relative;z-index:1;text-align:center}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;margin:0 0 26px;
  padding:7px 18px 7px 14px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
  font-size:13.5px;color:var(--text-mid);letter-spacing:.3px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--c1);box-shadow:0 0 0 4px rgba(110,231,249,.16)}

h1{
  margin:0 0 26px;font-weight:800;letter-spacing:-.5px;line-height:1.14;
  font-size:clamp(38px,6.4vw,72px);
  background:linear-gradient(180deg,#FFFFFF 22%,#B9C0D6 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
h1 .h1-sub{
  display:block;margin-top:12px;font-size:clamp(19px,2.7vw,32px);font-weight:700;letter-spacing:0;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.lede{
  max-width:820px;margin:0 auto 40px;font-size:clamp(15.5px,1.5vw,17.5px);
  color:var(--text-mid);line-height:1.95;
}
.lede strong{color:var(--text);font-weight:600}
.lede code,.section-lede code,.faq code,.scene code,.steps code{
  padding:2px 7px;border-radius:6px;background:rgba(124,107,255,.14);
  border:1px solid rgba(124,107,255,.24);color:#CFC6FF;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
  list-style:none;margin:56px 0 14px;padding:0;
}
.hero-stats li{
  padding:24px 16px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--bg-card);
  backdrop-filter:blur(8px);transition:transform .3s,border-color .3s,background .3s;
}
.hero-stats li:hover{transform:translateY(-4px);border-color:var(--line-strong);background:var(--bg-card-hover)}
.hero-stats b{
  display:block;font-size:clamp(26px,3.4vw,36px);font-weight:800;line-height:1.2;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-stats span{display:block;margin-top:6px;font-size:13px;color:var(--text-dim)}
.stat-note{font-size:12.5px;color:var(--text-dim);line-height:1.8;margin:14px 0 0}

/* ===================== 通用区块 ===================== */
.section{padding:clamp(64px,8vw,108px) 0;position:relative}
.section-alt{background:linear-gradient(180deg,transparent,rgba(255,255,255,.022) 12%,rgba(255,255,255,.022) 88%,transparent);
  border-block:1px solid var(--line)}
.kicker{
  margin:0 0 14px;font-size:13px;font-weight:700;letter-spacing:3px;text-transform:uppercase;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
h2{
  margin:0 0 20px;font-size:clamp(26px,3.7vw,42px);font-weight:800;line-height:1.28;letter-spacing:-.3px;
  color:#F2F4FA;
}
h3{margin:0 0 12px;font-size:clamp(17.5px,2vw,21px);font-weight:700;color:#EDF0F8;line-height:1.45}
h4{margin:0 0 10px;font-size:16.5px;font-weight:700;color:#EDF0F8}
p{margin:0 0 14px}
.section-lede{max-width:880px;font-size:16px;color:var(--text-mid);line-height:1.95;margin-bottom:44px}
.section-lede strong{color:var(--text)}

/* ===================== 请求链路流程图 ===================== */
.flow{display:flex;align-items:stretch;gap:0;margin:0 0 60px;flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px}
.flow-node{
  flex:1 1 0;min-width:172px;padding:22px 18px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--bg-card);text-align:center;position:relative;
  transition:transform .3s,border-color .3s;
}
.flow-node:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.flow-node-core{
  border-color:rgba(124,107,255,.45);
  background:linear-gradient(180deg,rgba(124,107,255,.15),rgba(124,107,255,.04));
  box-shadow:0 16px 40px -18px rgba(124,107,255,.6);
}
.flow-idx{
  display:block;font-family:var(--mono);font-size:11.5px;letter-spacing:2px;margin-bottom:8px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.flow-node b{display:block;font-size:15.5px;margin-bottom:7px}
.flow-node em{font-style:normal;font-size:12.5px;color:var(--text-dim);line-height:1.7}
.flow-arrow{flex:0 0 34px;align-self:center;height:1px;background:linear-gradient(90deg,transparent,var(--c2),transparent);position:relative}
.flow-arrow::after{
  content:"";position:absolute;right:2px;top:-3.5px;
  border:4px solid transparent;border-left-color:var(--c2);
}

/* ===================== 痛点 ===================== */
.pain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin-top:24px}
.pain{padding:26px 24px;border-radius:var(--radius);border:1px solid var(--line);
  background:var(--bg-card);transition:transform .3s,border-color .3s,background .3s}
.pain:hover{transform:translateY(-4px);border-color:var(--line-strong);background:var(--bg-card-hover)}
.pain h4{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.pain p{margin:0;font-size:14.5px;color:var(--text-mid);line-height:1.85}

/* ===================== 能力卡片 ===================== */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.card{
  position:relative;padding:30px 26px;border-radius:var(--radius);
  border:1px solid var(--line);background:var(--bg-card);overflow:hidden;
  transition:transform .32s,border-color .32s,background .32s,box-shadow .32s;
}
.card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;
  background:var(--grad);opacity:0;transition:opacity .32s;
}
.card:hover{transform:translateY(-6px);border-color:var(--line-strong);background:var(--bg-card-hover);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card-ico{
  width:46px;height:46px;display:grid;place-items:center;margin-bottom:18px;
  border-radius:13px;font-size:21px;
  background:linear-gradient(140deg,rgba(110,231,249,.16),rgba(196,107,255,.16));
  border:1px solid var(--line-strong);
}
.card p{margin:0;font-size:14.5px;color:var(--text-mid);line-height:1.9}
.card code{padding:1px 6px;border-radius:5px;background:rgba(124,107,255,.15);color:#CFC6FF}

/* ===================== 表格 ===================== */
.table-scroll{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--line);background:rgba(255,255,255,.022)}
table{width:100%;border-collapse:collapse;min-width:720px;font-size:14.5px}
thead th{
  padding:16px 18px;text-align:left;font-size:13px;font-weight:700;letter-spacing:1.2px;
  color:var(--text-mid);text-transform:uppercase;
  background:rgba(255,255,255,.045);border-bottom:1px solid var(--line-strong);white-space:nowrap;
}
tbody th,tbody td{padding:16px 18px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
tbody tr{transition:background .22s}
tbody tr:hover{background:rgba(255,255,255,.035)}
tbody th{font-weight:600;color:var(--text);white-space:nowrap}
tbody td{color:var(--text-mid)}
.price-table code{color:#CFC6FF;font-size:13.5px}
.tag{
  display:inline-block;margin-left:8px;padding:2px 9px;border-radius:999px;
  font-size:11px;font-weight:600;letter-spacing:.5px;vertical-align:middle;
  border:1px solid var(--line-strong);color:var(--text-mid);background:rgba(255,255,255,.05);
}
.tag-hot{border-color:transparent;background:var(--grad-btn);color:#06070F}
.cmp-table .col-hl{background:rgba(124,107,255,.09)}
.cmp-table thead .col-hl{background:rgba(124,107,255,.18);color:#E4DFFF}
.cmp-table i{font-style:normal;font-weight:700;margin-right:7px}
.cmp-table .yes{color:#5BE6B0}
.cmp-table .no{color:#FF7A85}
.cmp-table .mid{color:#FFC46B}

/* ===================== 步骤 ===================== */
.steps{counter-reset:s;list-style:none;margin:0 0 44px;padding:0;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px}
.steps li{
  counter-increment:s;position:relative;padding:28px 24px 26px 24px;
  border-radius:var(--radius);border:1px solid var(--line);background:var(--bg-card);
}
.steps li::before{
  content:counter(s,decimal-leading-zero);
  display:block;margin-bottom:14px;font-family:var(--mono);font-size:26px;font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.steps b{display:block;font-size:16.5px;margin-bottom:8px}
.steps span{display:block;font-size:14.5px;color:var(--text-mid);line-height:1.9}

/* ===================== 代码卡片 ===================== */
.code-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(400px,1fr));gap:20px}
.code-card{border-radius:var(--radius);border:1px solid var(--line);background:#0A0D18;overflow:hidden;
  transition:border-color .3s,box-shadow .3s}
.code-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow)}
.code-head{
  display:flex;align-items:center;gap:9px;padding:13px 18px;
  border-bottom:1px solid var(--line);background:rgba(255,255,255,.03);
}
.code-head::before{
  content:"";width:9px;height:9px;border-radius:50%;background:var(--c3);flex:none;
  box-shadow:14px 0 0 var(--c2),28px 0 0 var(--c1);margin-right:30px;
}
.code-lang{font-size:12.5px;color:var(--text-dim);letter-spacing:.6px}
.code-card pre{
  margin:0;padding:22px;overflow-x:auto;
  font-family:var(--mono);font-size:13px;line-height:1.85;color:#C8D2EA;
  tab-size:2;
}
.code-card pre code{font-size:inherit;color:inherit;background:none;border:0;padding:0}

/* ===================== 场景 ===================== */
.scene-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.scene{
  padding:28px 26px;border-radius:var(--radius);border:1px solid var(--line);
  background:var(--bg-card);position:relative;overflow:hidden;
  transition:transform .3s,border-color .3s,background .3s;
}
.scene::after{
  content:"";position:absolute;left:26px;bottom:0;width:44px;height:2px;border-radius:2px;
  background:var(--grad);opacity:.55;transition:width .35s;
}
.scene:hover{transform:translateY(-5px);border-color:var(--line-strong);background:var(--bg-card-hover)}
.scene:hover::after{width:80px}
.scene p{margin:0;font-size:14.5px;color:var(--text-mid);line-height:1.9}

/* ===================== FAQ ===================== */
.faq{
  border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-card);
  margin-bottom:12px;overflow:hidden;transition:border-color .28s,background .28s;
}
.faq:hover{border-color:var(--line-strong)}
.faq[open]{background:var(--bg-card-hover);border-color:rgba(124,107,255,.35)}
.faq summary{
  list-style:none;cursor:pointer;padding:20px 56px 20px 24px;position:relative;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:24px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--c2);border-bottom:2px solid var(--c2);
  transform:translateY(-70%) rotate(45deg);transition:transform .3s;
}
.faq[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq p{margin:0;padding:0 24px 22px;font-size:14.5px;color:var(--text-mid);line-height:1.95}

/* ===================== 结尾 CTA ===================== */
.cta-band{padding:clamp(64px,8vw,100px) 0;text-align:center;position:relative;overflow:hidden;
  border-top:1px solid var(--line)}
.cta-band::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:radial-gradient(700px 320px at 50% 100%,rgba(124,107,255,.24),transparent 70%);
}
.cta-band h2{margin-bottom:14px}
.cta-band p{max-width:620px;margin:0 auto 34px;color:var(--text-mid)}

/* ===================== 页脚 ===================== */
.site-footer{border-top:1px solid var(--line);background:rgba(0,0,0,.28);padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:36px}
.footer-brand svg{margin-bottom:14px}
.footer-brand p{font-size:13.5px;color:var(--text-dim);line-height:1.9;margin:0;max-width:340px}
.footer-brand strong{color:var(--text);font-size:15px}
.footer-col h3{font-size:14px;margin-bottom:14px;color:var(--text)}
.footer-col a{display:block;font-size:14px;color:var(--text-dim);padding:5px 0;transition:color .2s}
.footer-col a:hover{color:var(--c1)}
.footer-col p{font-size:13.5px;color:var(--text-dim);line-height:2;margin:0}
.footer-bottom{margin-top:44px;padding-top:24px;border-top:1px solid var(--line)}
.footer-bottom p{font-size:13px;color:var(--text-dim);margin:0 0 8px}
.disclaimer{font-size:12px;line-height:1.85;color:#5C6580}

/* =========================================================
   响应式：平板 / 手机
   ========================================================= */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .code-grid{grid-template-columns:1fr}
}

@media (max-width:860px){
  html{scroll-padding-top:74px}
  .container,.container-narrow{width:min(100% - 32px,var(--maxw))}

  /* 汉堡菜单（纯 CSS） */
  .nav-burger{
    display:flex;flex-direction:column;justify-content:center;gap:5px;
    width:42px;height:42px;padding:0 9px;border-radius:11px;cursor:pointer;
    border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
  }
  .nav-burger span{display:block;height:2px;width:100%;border-radius:2px;background:var(--text);
    transition:transform .3s,opacity .25s}
  .nav-toggle:focus-visible ~ .nav-burger{outline:2px solid var(--c1);outline-offset:3px}
  .nav-toggle:checked ~ .nav-burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle:checked ~ .nav-burger span:nth-child(2){opacity:0}
  .nav-toggle:checked ~ .nav-burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  .site-nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:2px;padding:0 16px;
    background:rgba(7,9,18,.97);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;opacity:0;
    transition:max-height .38s ease,opacity .3s,padding .3s;
  }
  .nav-toggle:checked ~ .site-nav{max-height:460px;opacity:1;padding:12px 16px 20px}
  .site-nav a{padding:13px 12px;font-size:15.5px;border-radius:10px}
  .btn-nav{margin:8px 0 0;padding:13px 20px;text-align:center;justify-content:center}

  /* 流程图竖排 */
  .flow{flex-direction:column;overflow-x:visible}
  .flow-node{min-width:0}
  .flow-arrow{flex:0 0 26px;width:1px;height:26px;margin:0 auto;
    background:linear-gradient(180deg,transparent,var(--c2),transparent)}
  .flow-arrow::after{right:auto;left:-3.5px;top:auto;bottom:2px;
    border-left-color:transparent;border-top-color:var(--c2)}

  .hero-stats{grid-template-columns:repeat(2,1fr);margin-top:42px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-brand p{max-width:none}
}

@media (max-width:560px){
  body{font-size:15.5px}
  .hero{padding-top:52px}
  .hero-cta .btn{width:100%}
  .hero-stats{gap:10px}
  .hero-stats li{padding:18px 12px}
  .card,.pain,.scene,.steps li{padding:22px 18px}
  .faq summary{padding:17px 46px 17px 18px;font-size:15px}
  .faq p{padding:0 18px 18px}
  .faq summary::after{right:18px}
  .code-card pre{padding:16px;font-size:12.2px}
  .table-scroll{border-radius:var(--radius-sm)}
  thead th,tbody th,tbody td{padding:13px 14px}
  .site-footer{padding:44px 0 24px}
}

/* 打印与降级 */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
}