/* ============================================================
   AIOps Monitor · 营销宣传网站样式
   设计语言：简约 · 大气 · 现代 —— 深色为基调，品牌色克制点缀
   ============================================================ */
:root{
  --bg:#0a0e1a; --bg2:#0f1525; --bg3:#161d33;
  --surface:#131a2e; --surface2:#1a2240; --surface3:#222b4d;
  --line:#253055; --line2:#324070;
  --txt:#f2f5ff; --txt2:#b8c2e0; --muted:#7a86ad; --muted2:#5a6588;
  --accent:#3b82f6; --accent2:#22d3ee; --accent-soft:rgba(59,130,246,.10);
  --ok:#10b981; --ok-soft:rgba(16,185,129,.10);
  --warn:#f59e0b; --warn-soft:rgba(245,158,11,.10);
  --crit:#ef4444; --crit-soft:rgba(239,68,68,.10);
  --purple:#8b5cf6; --purple-soft:rgba(139,92,246,.10);
  --r-sm:8px; --r:12px; --r-lg:18px; --r-xl:28px;
  --shadow:0 2px 12px rgba(0,0,0,.25);
  --shadow-lg:0 16px 50px rgba(0,0,0,.45);
  --gradient:linear-gradient(135deg,var(--accent),var(--accent2));
  --gradient-soft:linear-gradient(135deg,var(--accent-soft),rgba(34,211,238,.05));
  --transition:220ms cubic-bezier(.4,0,.2,1);
  --max-w:1140px;
  /* 导航栏背景与代码面板（代码面板始终深色，强化品牌“开发者工具”调性） */
  --nav-bg:rgba(10,14,26,.72); --nav-scrolled-bg:rgba(10,14,26,.92);
  --code-bg:#0d1117; --code-bar:#161b22; --code-border:#1f2937;
  --code-fg:#c9d1d9; --code-muted:#8b949e; --code-ok:#3fb950; --code-accent:#56d4dd;
  /* 主题跟随的图标边框色（JS 动态渲染用，避免固定 rgba 在浅色主题下失真） */
  --ok-border: rgba(16,185,129,.30); --accent-border: rgba(59,130,246,.30);
  --warn-border: rgba(245,158,11,.30); --purple-border: rgba(139,92,246,.30);
  color-scheme:dark;
}

/* ===== 浅色主题（WCAG AA 对比度 · 品牌青蓝调性） ===== */
:root[data-theme="light"]{
  --bg:#f6f8fc; --bg2:#eef2f9; --bg3:#e6ecf6;
  --surface:#ffffff; --surface2:#f4f7fc; --surface3:#eaf0f9;
  --line:#e6ebf4; --line2:#d4dcea;
  --txt:#0f172a; --txt2:#475569; --muted:#5c6a85; --muted2:#8593a8;
  --accent:#2563eb; --accent2:#0891b2; --accent-soft:rgba(37,99,235,.08);
  --ok:#15803d; --ok-soft:rgba(21,128,61,.08);
  --warn:#b45309; --warn-soft:rgba(180,83,9,.08);
  --crit:#dc2626; --crit-soft:rgba(220,38,38,.08);
  --purple:#7c3aed; --purple-soft:rgba(124,58,237,.08);
  --shadow:0 2px 12px rgba(15,23,42,.06);
  --shadow-lg:0 16px 50px rgba(15,23,42,.12);
  --gradient:linear-gradient(135deg,var(--accent),var(--accent2));
  --gradient-soft:linear-gradient(135deg,var(--accent-soft),rgba(8,145,178,.04));
  --nav-bg:rgba(255,255,255,.78); --nav-scrolled-bg:rgba(255,255,255,.94);
  /* 浅色主题的图标边框色（与浅色品牌色一致，白底上清晰可见） */
  --ok-border: rgba(16,185,129,.22); --accent-border: rgba(37,99,235,.22);
  --warn-border: rgba(180,83,9,.22); --purple-border: rgba(124,58,237,.22);
  color-scheme:light;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.7;overflow-x:hidden;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.mono{font-variant-numeric:tabular-nums}

/* ===== 语言切换 ===== */
.lang-toggle{
  display:inline-flex;align-items:center;gap:5px;
  background:var(--surface2);border:1px solid var(--line2);
  border-radius:999px;padding:6px 13px;font-size:13px;
  color:var(--txt2);cursor:pointer;font-weight:500;font-family:inherit;
  transition:all var(--transition);
}
.lang-toggle:hover{border-color:var(--accent);color:var(--accent2)}
.lang-toggle svg{width:14px;height:14px}
.lang-toggle option{background:var(--surface2);color:var(--txt)}

/* ===== 导航栏 ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:var(--nav-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid transparent;
  transition:background var(--transition),border-color var(--transition);
}
.navbar.scrolled{background:var(--nav-scrolled-bg);border-bottom-color:var(--line);box-shadow:0 1px 12px rgba(0,0,0,.12)}
.nav-inner{max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:14px 28px}
.nav-logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:17px;letter-spacing:-.2px}
.nav-logo .logo-icon{
  width:34px;height:34px;border-radius:10px;background:var(--gradient);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#fff;
  box-shadow:0 4px 14px rgba(59,130,246,.35);
}
.nav-links{display:flex;gap:34px;align-items:center}
.nav-links a{color:var(--txt2);font-size:14px;font-weight:500;transition:color var(--transition);position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--txt)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-22px;height:2px;background:var(--gradient);border-radius:2px}
.nav-cta{
  background:var(--gradient);color:#fff;padding:9px 20px;border-radius:999px;
  font-size:14px;font-weight:600;transition:transform var(--transition),box-shadow var(--transition);
  box-shadow:0 4px 16px rgba(59,130,246,.28);
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(59,130,246,.4)}
.nav-toggle{display:none;background:none;border:none;color:var(--txt);cursor:pointer;font-size:24px;line-height:1}

/* ===== 通用按钮 ===== */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--gradient);color:#fff;padding:14px 30px;border-radius:999px;
  font-size:15px;font-weight:600;border:none;cursor:pointer;
  transition:transform var(--transition),box-shadow var(--transition);
  box-shadow:0 6px 20px rgba(59,130,246,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(59,130,246,.4)}
.btn-secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--surface2);color:var(--txt);padding:14px 30px;border-radius:999px;
  font-size:15px;font-weight:600;border:1px solid var(--line2);cursor:pointer;
  transition:all var(--transition);
}
.btn-secondary:hover{border-color:var(--accent);background:var(--surface3);color:var(--txt)}

/* ===== Hero ===== */
.hero{
  min-height:92vh;display:flex;align-items:center;position:relative;
  padding:140px 28px 80px;overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(60% 50% at 15% 30%,rgba(59,130,246,.14) 0%,transparent 60%),
    radial-gradient(55% 45% at 85% 25%,rgba(34,211,238,.10) 0%,transparent 55%);
}
.hero-grid{
  position:absolute;inset:0;z-index:0;opacity:.18;pointer-events:none;
  background-image:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse at center,black 20%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at center,black 20%,transparent 72%);
}
.hero-inner{max-width:920px;margin:0 auto;position:relative;z-index:1;width:100%;text-align:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--accent-soft);border:1px solid rgba(59,130,246,.28);
  padding:6px 16px;border-radius:999px;font-size:13px;color:var(--accent2);margin-bottom:26px;font-weight:500;
}
.hero h1{font-size:clamp(34px,5.4vw,58px);font-weight:800;line-height:1.12;letter-spacing:-1.2px;margin-bottom:22px}
.hero h1 .gradient-text{background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-positioning{font-size:15px;color:var(--accent2);font-weight:600;letter-spacing:.3px;margin-bottom:18px}
.hero p{font-size:18px;color:var(--txt2);max-width:680px;margin:0 auto 36px;line-height:1.75}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
.hero-links{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:center;margin-top:22px;font-size:13px;color:var(--muted)}
.hero-links a{color:var(--txt2);transition:color var(--transition)}
.hero-links a:hover{color:var(--accent2)}
.hero-links-sep{color:var(--muted2)}
.hero-proof{display:flex;gap:22px;flex-wrap:wrap;justify-content:center;margin-top:34px;font-size:13.5px;color:var(--txt2)}
.hero-proof span{display:inline-flex;align-items:center}
.hero-proof span::before{content:"✓";color:var(--ok);font-weight:800;margin-right:7px}
.hero-creds{margin-top:18px;font-size:13px;color:var(--muted)}
.hero-stats{display:flex;gap:56px;margin:48px auto 0;flex-wrap:wrap;justify-content:center}
.hero-stat .num{font-size:38px;font-weight:800;background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1}
.hero-stat .label{font-size:13px;color:var(--muted);margin-top:8px}

/* ===== 通用 Section ===== */
.section{padding:104px 28px;position:relative;scroll-margin-top:84px}
section[id]{scroll-margin-top:84px}
.section-inner{max-width:var(--max-w);margin:0 auto}
.section-head{text-align:center;margin-bottom:64px;max-width:720px;margin-left:auto;margin-right:auto}
.section-tag{
  display:inline-block;font-size:13px;color:var(--accent2);font-weight:600;
  letter-spacing:1.5px;text-transform:uppercase;margin-bottom:14px;
}
.section h2{font-size:clamp(26px,3.4vw,38px);font-weight:760;letter-spacing:-.6px;line-height:1.2;margin-bottom:14px}
.section-desc{color:var(--muted);font-size:16px;max-width:600px;margin:0 auto;line-height:1.7}

/* ===== 痛点卡片 ===== */
.pain-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(250px,100%),1fr));gap:20px}
.pain-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 28px;transition:border-color var(--transition),transform var(--transition),box-shadow var(--transition);
  position:relative;overflow:hidden;
}
.pain-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--crit),var(--warn));transform:scaleX(0);transform-origin:left;transition:transform var(--transition);
}
.pain-card:hover{border-color:var(--line2);transform:translateY(-4px);box-shadow:var(--shadow)}
.pain-card:hover::before{transform:scaleX(1)}
.pain-icon{
  width:46px;height:46px;border-radius:12px;background:var(--crit-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.pain-icon svg{width:22px;height:22px;color:var(--crit)}
.pain-card h3{font-size:18px;font-weight:640;margin-bottom:10px}
.pain-card p{color:var(--muted);font-size:14px;line-height:1.65}
.pain-solution{
  margin-top:16px;padding:12px 15px;background:var(--ok-soft);border-radius:var(--r-sm);
  font-size:13px;color:var(--ok);display:flex;align-items:flex-start;gap:8px;line-height:1.55;
}
.pain-solution svg{width:16px;height:16px;flex:none;margin-top:2px}

/* ===== 功能网格 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(310px,100%),1fr));gap:20px}
.feature-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 28px;transition:border-color var(--transition),transform var(--transition),box-shadow var(--transition);
  position:relative;overflow:hidden;
}
.feature-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-card .glow{display:none}
.feature-icon{
  width:50px;height:50px;border-radius:13px;background:var(--gradient-soft);
  border:1px solid rgba(59,130,246,.18);
  display:flex;align-items:center;justify-content:center;margin-bottom:22px;position:relative;z-index:1;
}
.feature-icon svg{width:25px;height:25px;color:var(--accent2)}
.feature-card h3{font-size:19px;font-weight:640;margin-bottom:10px;position:relative;z-index:1;letter-spacing:-.2px}
.feature-card .desc{color:var(--muted);font-size:14px;line-height:1.7;margin-bottom:16px;position:relative;z-index:1}
.feature-card .value{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--accent2);font-weight:500;
  padding-top:16px;border-top:1px solid var(--line);position:relative;z-index:1;
}
.feature-card .value svg{width:16px;height:16px;flex:none}

/* ===== 解决方案场景 ===== */
.scenario-list{display:flex;flex-direction:column;gap:22px}
.scenario{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:40px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
  transition:border-color var(--transition);
}
.scenario:hover{border-color:var(--line2)}
.scenario-num{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;margin-bottom:8px}
.scenario h3{font-size:23px;font-weight:680;margin-bottom:12px;letter-spacing:-.3px}
.scenario p{color:var(--muted);font-size:15px;margin-bottom:18px;line-height:1.7}
.scenario-list ul{list-style:none;padding:0}
.scenario-list li{padding:7px 0 7px 24px;position:relative;color:var(--txt2);font-size:14px;line-height:1.6}
.scenario-list li::before{content:"";position:absolute;left:0;top:14px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.scenario-visual{
  background:var(--code-bg);border:1px solid var(--code-border);border-radius:var(--r-lg);
  min-height:240px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;
}
.scenario-visual .mockup{
  font-family:monospace;font-size:12px;color:var(--code-ok);text-align:left;
  background:var(--code-bar);border:1px solid var(--code-border);border-radius:var(--r-sm);
  padding:16px 20px;width:90%;line-height:1.8;word-break:break-word;overflow-wrap:anywhere;white-space:normal;
}
.scenario-result{
  display:flex;align-items:center;gap:8px;margin-top:18px;padding:10px 14px;
  background:var(--accent-soft);border:1px solid rgba(59,130,246,.22);border-radius:var(--r-sm);
  color:var(--accent2);font-size:13.5px;font-weight:600;line-height:1.45;
}
.scenario-result svg{width:16px;height:16px;flex:none}

/* ===== 对比表格 ===== */
.compare-table-wrap{overflow-x:auto;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--surface)}
.compare-table{width:100%;border-collapse:collapse;min-width:720px}
.compare-table th,.compare-table td{padding:17px 20px;text-align:left;border-bottom:1px solid var(--line)}
.compare-table th{background:var(--surface2);font-size:13px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.compare-table td{font-size:14px;color:var(--txt2)}
.compare-table .col-highlight{background:var(--accent-soft)}
.compare-table .col-highlight th{color:var(--accent2)}
.compare-table .yes{color:var(--ok);font-weight:600}
.compare-table .no{color:var(--muted2)}
.compare-table th:first-child,.compare-table td.feat-name{position:sticky;left:0;z-index:2}
.compare-table th:first-child{background:var(--surface2)}
.compare-table .feat-name{font-weight:600;color:var(--txt);background:var(--surface);box-shadow:1px 0 0 var(--line)}
.compare-table tr:last-child td{border-bottom:none}

/* ===== 工作原理 / 架构 ===== */
.arch{display:grid;grid-template-columns:1fr auto 1fr;gap:24px;align-items:stretch;margin-top:52px}
.arch-col{display:flex;flex-direction:column;gap:14px;justify-content:center}
.arch-node{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:15px 18px;display:flex;align-items:center;gap:12px;
  transition:border-color var(--transition),transform var(--transition);
}
.arch-node:hover{border-color:var(--accent);transform:translateY(-2px)}
.arch-node .ico{
  width:38px;height:38px;border-radius:10px;background:var(--gradient-soft);
  border:1px solid rgba(59,130,246,.18);display:flex;align-items:center;justify-content:center;flex:none;
}
.arch-node .ico svg{width:20px;height:20px;color:var(--accent2)}
.arch-node .t{font-size:14px;font-weight:600}
.arch-node .s{font-size:12px;color:var(--muted);margin-top:2px}
.arch-center{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;min-width:240px}
.arch-core{
  background:var(--surface);border:1px solid var(--line2);border-radius:var(--r-lg);padding:26px;text-align:center;position:relative;overflow:hidden;
}
.arch-core::before{content:"";position:absolute;top:-60px;left:50%;transform:translateX(-50%);width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,var(--accent-soft),transparent 70%)}
.arch-core .logo-icon{width:48px;height:48px;border-radius:13px;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;margin:0 auto 12px;position:relative;box-shadow:0 6px 18px rgba(59,130,246,.3)}
.arch-core h4{font-size:17px;position:relative;font-weight:680}
.arch-core p{font-size:13px;color:var(--muted);margin-top:6px;position:relative}
.arch-caps{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:14px}
.arch-caps span{font-size:12px;background:var(--surface2);border:1px solid var(--line);border-radius:999px;padding:4px 12px;color:var(--txt2)}
.arch-arrow{color:var(--muted2);font-size:20px;line-height:1}

/* ===== CTA ===== */
.cta-section{padding:88px 28px;text-align:center}
.cta-box{
  max-width:820px;margin:0 auto;
  background:var(--surface);border:1px solid var(--line2);border-radius:var(--r-xl);padding:60px 48px;
  position:relative;overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;top:-120px;left:50%;transform:translateX(-50%);
  width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,var(--accent-soft),transparent 70%);
}
.cta-box h2{font-size:clamp(24px,3vw,32px);font-weight:740;margin-bottom:16px;position:relative;letter-spacing:-.4px}
.cta-box p{color:var(--muted);font-size:16px;margin-bottom:30px;position:relative}
.cta-cmd{word-break:break-word;overflow-wrap:anywhere;text-align:left}
.cta-cmd-inner{
  background:var(--code-bg);border:1px solid var(--code-border);border-radius:var(--r-sm);
  padding:18px 22px;margin:22px auto;max-width:540px;font-family:monospace;font-size:13px;line-height:1.9;color:var(--code-ok);
}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--line);padding:56px 28px 36px;background:var(--bg2)}
.footer-inner{max-width:var(--max-w);margin:0 auto;display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:36px}
.footer-brand{max-width:320px}
.footer-brand .nav-logo{margin-bottom:14px}
.footer-brand p{color:var(--muted);font-size:13.5px;line-height:1.7}
.footer-links{display:flex;gap:56px;flex-wrap:wrap}
.footer-col h4{font-size:14px;font-weight:640;margin-bottom:14px;color:var(--txt)}
.footer-col a{display:block;color:var(--muted);font-size:13.5px;padding:5px 0;transition:color var(--transition)}
.footer-col a:hover{color:var(--accent2)}
.footer-bottom{text-align:center;color:var(--muted2);font-size:12.5px;padding-top:32px;border-top:1px solid var(--line);margin-top:36px}

/* ===== 动画 ===== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.4,0,.2,1),transform .7s cubic-bezier(.4,0,.2,1)}
.js .reveal.visible{opacity:1;transform:none}
.float-anim{animation:float 3s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .nav-links.open{display:flex;position:absolute;top:100%;left:0;right:0;background:var(--bg2);flex-direction:column;padding:18px 28px;gap:16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav-links.open a.active::after{display:none}
  .hero h1{font-size:clamp(30px,7vw,42px)}
  .section h2{font-size:clamp(24px,5vw,30px)}
  .scenario{grid-template-columns:1fr;padding:28px}
  .scenario:nth-child(even) .scenario-visual{order:0}
}
@media(max-width:600px){
  .hero{padding:120px 20px 64px;min-height:auto}
  .hero p{font-size:16px}
  .section{padding:72px 20px}
  .section-head{margin-bottom:44px}
  .cta-box{padding:40px 22px}
  .hero-stats{gap:32px}
  .hero-stats{flex-direction:column;gap:24px}
}
@media(max-width:480px){
  .nav-inner{padding:12px 18px}
  .nav-cta{padding:8px 16px;font-size:13px}
  .hero-stats{flex-direction:row;flex-wrap:wrap;justify-content:center;gap:28px}
}
@media(max-width:400px){
  .nav-logo span:not(.logo-icon){display:none}
  .footer-links{gap:32px}
}

/* ===== 功能分组（features 页） ===== */
.feat-groups{display:flex;flex-direction:column;gap:80px}
.feat-group-head{display:flex;align-items:center;gap:20px;margin-bottom:36px}
.feat-group-tag{
  flex:none;width:54px;height:54px;border-radius:14px;
  background:var(--gradient);color:#fff;font-size:21px;font-weight:800;
  display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(59,130,246,.28);
}
.feat-group-head h3{font-size:23px;font-weight:720;margin-bottom:4px;letter-spacing:-.3px}
.feat-group-head p{font-size:14px;color:var(--muted);margin:0}
.feat-group .feature-grid{margin-top:0}
.feat-group{scroll-margin-top:84px}
.feat-layout{display:grid;grid-template-columns:228px 1fr;gap:48px;align-items:start;margin-top:8px}
.feat-rail{position:relative}
.feat-subnav{position:sticky;top:88px;z-index:20;display:flex;flex-direction:column;gap:2px;padding:0;margin:0}
.feat-subnav-link{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:13.5px;color:var(--txt2);padding:9px 12px;border-radius:var(--r-sm);border-left:2px solid transparent;transition:all var(--transition)}
.feat-subnav-link:hover,.feat-subnav-link:focus-visible{color:var(--accent2);background:var(--surface2)}
.feat-subnav-link.active{color:var(--txt);background:var(--surface2);border-left-color:var(--accent);font-weight:600}
.rail-num{flex:none;width:26px;height:26px;border-radius:8px;background:var(--surface2);color:var(--muted);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}
.feat-subnav-link.active .rail-num{background:var(--accent);color:#fff}
.rail-txt{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.feat-badge{display:inline-block;margin-left:10px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--accent),var(--purple));vertical-align:middle}
.feat-val{display:flex;align-items:flex-start;gap:8px;font-size:13px;line-height:1.6;color:var(--accent2);padding-top:16px;margin-top:4px;border-top:1px solid var(--line);position:relative;z-index:1}
.feat-val svg{flex:none;width:16px;height:16px;margin-top:1px;color:var(--accent)}
@media(max-width:1024px){
  .feat-layout{grid-template-columns:1fr;gap:0}
  .feat-subnav{position:sticky;top:72px;flex-direction:row;gap:5px;overflow-x:auto;padding:8px 0;margin-bottom:16px;-webkit-overflow-scrolling:touch}
  .feat-subnav-link{padding:4px 10px;border-left:none;border-radius:999px;background:var(--surface);border:1px solid var(--line2)}
  .feat-subnav-link.active{border-color:var(--accent);background:var(--accent-soft)}
  .feat-subnav-link.active .rail-num{background:var(--accent)}
  .rail-txt{display:none}
  .rail-num{width:auto;height:auto;border-radius:999px;padding:0 5px;background:transparent}
}

/* ===== FAQ 手风琴 ===== */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:820px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;transition:border-color var(--transition);
}
.faq-item.open{border-color:var(--line2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:none;cursor:pointer;text-align:left;
  padding:22px 24px;font-size:16px;font-weight:600;color:var(--txt);font-family:inherit;transition:color var(--transition);
}
.faq-q:hover{color:var(--accent2)}
.faq-q .faq-chev{width:20px;height:20px;flex:none;color:var(--muted);transition:transform var(--transition)}
.faq-item.open .faq-q .faq-chev{transform:rotate(180deg);color:var(--accent2)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 22px;color:var(--txt2);font-size:15px;line-height:1.85;margin:0}
@media(max-width:600px){
  .feat-groups{gap:56px}
  .feat-group-head{gap:14px;margin-bottom:24px}
  .feat-group-tag{width:46px;height:46px;font-size:18px;border-radius:12px}
  .feat-group-head h3{font-size:20px}
  .faq-q{font-size:15px;padding:18px 18px}
  .faq-a p{padding:0 18px 18px}
}

/* ===== 技术生态集成（index 页） ===== */
.integrations{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(140px,100%),1fr));gap:16px}
.integration-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 16px;transition:border-color var(--transition),transform var(--transition);
}
.integration-item:hover{border-color:var(--accent);transform:translateY(-4px)}
.integration-ico{
  width:48px;height:48px;border-radius:13px;background:var(--gradient-soft);
  border:1px solid rgba(59,130,246,.18);display:flex;align-items:center;justify-content:center;
}
.integration-ico svg{width:25px;height:25px;color:var(--accent2)}
.integration-item span{font-size:14px;font-weight:600;color:var(--txt2);word-break:break-word}

/* ===== 端口转发独家能力（index 页） ===== */
.fwd-showcase{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.fwd-copy .section-tag{margin-bottom:12px}
.fwd-copy h2{font-size:clamp(24px,3vw,32px);font-weight:720;letter-spacing:-.5px;line-height:1.22;margin-bottom:16px}
.fwd-lead{color:var(--txt2);font-size:15px;line-height:1.8;margin-bottom:24px}
.fwd-points{list-style:none;padding:0;margin:0 0 28px;display:flex;flex-direction:column;gap:13px}
.fwd-points li{display:flex;align-items:flex-start;gap:12px;font-size:14px;color:var(--txt2);line-height:1.6}
.fwd-points li svg{width:18px;height:18px;flex:none;margin-top:2px;color:var(--ok)}
.fwd-visual{position:relative}
.fwd-term{background:var(--code-bg);border:1px solid var(--code-border);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.fwd-term-bar{display:flex;align-items:center;gap:8px;padding:14px 18px;background:var(--code-bar);border-bottom:1px solid var(--code-border)}
.fwd-term-bar span{width:12px;height:12px;border-radius:50%;background:var(--muted2)}
.fwd-term-bar span:nth-child(1){background:var(--crit)}
.fwd-term-bar span:nth-child(2){background:var(--warn)}
.fwd-term-bar span:nth-child(3){background:var(--ok)}
.fwd-term-body{padding:22px 24px;font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:13px;line-height:2;color:var(--code-fg)}
.fwd-line{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fwd-indent{padding-left:20px}
.fwd-c-muted{color:var(--code-muted)}
.fwd-c-ok{color:var(--code-ok);font-weight:600}
.fwd-c-accent{color:var(--code-accent);font-weight:600}
@media(max-width:900px){
  .fwd-showcase{grid-template-columns:1fr;gap:36px}
  .fwd-copy h2{font-size:26px}
  .fwd-line{white-space:normal;word-break:break-word}
}

/* ===== 安卓 APP 亮点（index 页 · 新增） ===== */
.android-showcase{display:grid;grid-template-columns:1fr auto;gap:56px;align-items:center}
.android-copy .section-tag{margin-bottom:12px}
.android-copy h2{font-size:clamp(24px,3vw,32px);font-weight:720;letter-spacing:-.5px;line-height:1.22;margin-bottom:16px}
.android-lead{color:var(--txt2);font-size:15px;line-height:1.8;margin-bottom:24px}
.android-points{list-style:none;padding:0;margin:0 0 28px;display:flex;flex-direction:column;gap:14px}
.android-points li{display:flex;align-items:flex-start;gap:12px;font-size:14px;color:var(--txt2);line-height:1.6}
.android-points li svg{width:18px;height:18px;flex:none;margin-top:2px;color:var(--ok)}
.android-visual{position:relative;display:flex;justify-content:center}
.android-badges{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.android-badge{
  display:inline-flex;align-items:center;gap:8px;background:var(--surface2);border:1px solid var(--line2);
  border-radius:999px;padding:8px 16px;font-size:13px;color:var(--txt2);font-weight:500;
}
.android-badge svg{width:16px;height:16px;color:var(--accent2)}
/* 手机样机 */
.android-phone{
  width:260px;height:520px;border-radius:36px;background:var(--surface);
  border:1px solid var(--line2);padding:14px;box-shadow:var(--shadow-lg);position:relative;
  display:flex;flex-direction:column;
}
.android-phone::before{content:"";position:absolute;top:16px;left:50%;transform:translateX(-50%);width:64px;height:6px;border-radius:99px;background:var(--line2)}
.android-screen{margin-top:24px;flex:1;border-radius:22px;background:var(--code-bg);border:1px solid var(--code-border);overflow:hidden;display:flex;flex-direction:column}
.android-screen-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--code-bar);border-bottom:1px solid var(--code-border);font-size:12px;color:var(--code-muted)}
.android-screen-bar .dot{width:8px;height:8px;border-radius:50%;background:var(--ok)}
.android-screen-body{padding:18px 16px;display:flex;flex-direction:column;gap:14px}
.android-metric{background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.android-metric .l{font-size:11px;color:var(--muted);margin-bottom:6px}
.android-metric .v{font-size:20px;font-weight:800;color:var(--txt)}
.android-metric .v small{font-size:12px;font-weight:600;color:var(--ok);margin-left:6px}
.android-term-row{display:flex;align-items:center;gap:8px;background:var(--surface2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:11px;color:var(--code-ok);font-family:monospace}
.android-term-row svg{width:14px;height:14px;color:var(--accent2);flex:none}
@media(max-width:900px){
  .android-showcase{grid-template-columns:1fr;gap:40px}
  .android-copy h2{font-size:26px}
  .android-visual{order:-1}
}

/* ===== 社会证明（index 页） ===== */
.proof-section{padding:72px 28px}
.proof-strip{display:flex;gap:20px;flex-wrap:wrap;justify-content:center;margin-bottom:36px}
.proof-item{position:relative;padding:18px 24px 18px 46px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);min-width:220px}
.proof-item::before{content:"✓";position:absolute;left:18px;top:50%;transform:translateY(-50%);color:var(--ok);font-weight:800;font-size:18px}
.proof-item strong{display:block;font-size:17px;color:var(--txt);margin-bottom:2px}
.proof-item span{font-size:13px;color:var(--muted)}
.proof-quotes{display:flex;gap:24px;flex-wrap:wrap;justify-content:center;max-width:900px;margin:0 auto}
.proof-quote{margin:0;flex:1;min-width:260px;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--r);padding:22px 26px;font-size:15px;line-height:1.7;color:var(--txt2)}
.proof-quote p{margin:0}

/* ===== 联系我们（contact 页） ===== */
.contact-card{display:flex;flex-direction:column}
.contact-ic{width:50px;height:50px;border-radius:13px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;position:relative;z-index:1}
.contact-ic svg{width:25px;height:25px}
.contact-card .desc{flex:1}
.contact-addr{display:inline-block;font-size:16px;font-weight:600;color:var(--accent2);word-break:break-all;margin-bottom:18px;position:relative;z-index:1;transition:color var(--transition)}
.contact-addr:hover{color:var(--accent)}
.contact-btn{align-self:flex-start;position:relative;z-index:1}
.contact-resp{margin-top:56px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:40px;text-align:center}
.contact-resp>h3{font-size:20px;font-weight:720;margin-bottom:28px;letter-spacing:-.3px}
.contact-resp-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-resp-item{padding:0 12px}
.contact-resp-t{font-size:22px;font-weight:800;background:var(--gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:8px}
.contact-resp-d{font-size:13px;color:var(--muted);line-height:1.6}

/* ===== 联系页企业级区块 ===== */
.ent-band{margin-top:56px;background:var(--gradient-soft);border:1px solid var(--line);border-radius:var(--r);padding:44px 40px;text-align:center}
.ent-band .section-tag{margin-bottom:14px}
.ent-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.5px;margin-bottom:14px}
.ent-band p{max-width:680px;margin:0 auto;color:var(--muted);font-size:16px;line-height:1.7}
.ent-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(220px,100%),1fr));gap:20px;margin-top:48px}
.ent-step{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px 24px}
.ent-step::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--gradient)}
.ent-step-n{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;margin-bottom:16px;font-weight:800;font-size:16px;color:var(--accent);background:var(--accent-soft);border:1px solid rgba(59,130,246,.25)}
.ent-step h3{font-size:17px;font-weight:700;margin-bottom:8px}
.ent-step p{font-size:14px;color:var(--muted);line-height:1.65}
@media(max-width:700px){
  .contact-resp{padding:28px 20px}
  .contact-resp-grid{grid-template-columns:1fr;gap:20px}
  .ent-band{padding:32px 22px}
}

/* ===== 交互细节优化（按钮反馈 / 焦点可见 / 可访问性） ===== */
a:focus-visible,button:focus-visible,select:focus-visible,
.btn-primary:focus-visible,.btn-secondary:focus-visible,.nav-cta:focus-visible,
.lang-toggle:focus-visible,.faq-q:focus-visible,.nav-toggle:focus-visible,.theme-toggle:focus-visible{
  outline:2px solid var(--accent2);outline-offset:2px;border-radius:var(--r-sm);
}
.btn-primary:active{transform:translateY(0) scale(.985)}
.btn-secondary:active{transform:translateY(0) scale(.985);background:var(--surface3)}
.nav-cta:active{transform:translateY(0) scale(.97)}
.nav-toggle:active{transform:scale(.9)}
.lang-toggle:active{border-color:var(--accent);color:var(--accent2)}
.faq-q:active{color:var(--accent2)}
.theme-toggle:active{transform:scale(.92)}
.footer-bottom{color:var(--muted)}

/* ===== 主题切换按钮（导航栏） ===== */
.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:50%;
  background:var(--surface2);border:1px solid var(--line2);
  color:var(--txt2);cursor:pointer;flex:none;transition:all var(--transition);
}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent2);transform:translateY(-1px)}
.theme-toggle svg{width:18px;height:18px}

/* ===== 移动端吸底 CTA ===== */
.mobile-cta{
  position:fixed;left:16px;right:16px;bottom:16px;z-index:120;
  display:none;align-items:center;justify-content:center;gap:8px;
  background:var(--gradient);color:#fff;text-decoration:none;
  padding:14px 20px;border-radius:var(--r);font-weight:700;font-size:15px;box-shadow:var(--shadow-lg);
  opacity:0;transform:translateY(24px);pointer-events:none;transition:opacity var(--transition),transform var(--transition);
}
.mobile-cta:active{transform:scale(.98)}
@media(max-width:640px){
  .mobile-cta.show{display:flex;opacity:1;transform:none;pointer-events:auto}
}
@media(max-width:400px){
  .mobile-cta{left:12px;right:12px;bottom:12px;padding:13px 16px;font-size:14px}
}

/* ===== 返回顶部按钮 ===== */
.back-to-top{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;border:1px solid var(--line2);background:var(--surface);color:var(--txt);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity var(--transition),transform var(--transition),background var(--transition);z-index:60;box-shadow:0 6px 20px rgba(0,0,0,.25)}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--surface2);color:var(--accent2)}
.back-to-top:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.back-to-top svg{width:20px;height:20px}

/* ===== 邮件订阅（轻量 lead capture） ===== */
.subscribe-section{padding:88px 28px}
.subscribe-box{max-width:640px;margin:0 auto;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:48px 40px}
.subscribe-box .section-tag{margin-bottom:10px}
.subscribe-box h2{font-size:24px;font-weight:720;margin-bottom:24px;letter-spacing:-.3px}
.subscribe-form{display:flex;gap:12px;max-width:460px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.subscribe-input{flex:1;min-width:220px;padding:13px 18px;border-radius:var(--r-sm);border:1px solid var(--line2);background:var(--bg);color:var(--txt);font-size:15px;font-family:inherit}
.subscribe-input:focus{outline:none;border-color:var(--accent)}
.subscribe-note{font-size:13px;color:var(--muted);margin-top:16px}
.subscribe-ok{font-size:14px;color:var(--ok);margin-top:14px;font-weight:600}

/* ===== 主题切换过渡（深浅主题平滑） ===== */
body,.section,.footer,.cta-box,.compare-table-wrap{transition:background-color var(--transition),border-color var(--transition),color var(--transition)}

/* ===== 尊重「减少动态效果」偏好（无障碍） ===== */
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1!important;transform:none!important}
  .float-anim{animation:none!important}
  html{scroll-behavior:auto}
}

/* ===== 客户痛点带（features 页） ===== */
.pain-band{margin-top:30px}
.pain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.pain-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px 20px;transition:transform var(--transition),border-color var(--transition),box-shadow var(--transition);
}
.pain-card:hover{transform:translateY(-3px);border-color:var(--warn);box-shadow:var(--shadow)}
.pain-ico{
  width:42px;height:42px;border-radius:12px;margin-bottom:14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--warn-soft);color:var(--warn);
}
.pain-ico svg{width:22px;height:22px}
.pain-card h3{font-size:1.02rem;font-weight:700;margin:0 0 6px;color:var(--txt)}
.pain-card p{margin:0;font-size:.9rem;color:var(--muted);line-height:1.55}
@media(max-width:900px){.pain-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.pain-grid{grid-template-columns:1fr}}

/* ===== 功能组：痛点条 + 角色 chips ===== */
.feat-pain{
  display:flex;gap:10px;align-items:flex-start;
  background:var(--warn-soft);border:1px solid rgba(245,158,11,.28);
  color:var(--txt);border-radius:var(--r);padding:12px 14px;margin:16px 0 4px;
  font-size:.92rem;line-height:1.55;
}
.feat-pain svg{width:18px;height:18px;flex:none;color:var(--warn);margin-top:2px}
.feat-roles{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:4px}
.chip{
  font-size:.78rem;font-weight:600;padding:3px 11px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent);border:1px solid rgba(59,130,246,.22);
}
/* 高亮卡片（重点能力） */
.feature-card.hl{border-color:var(--accent);box-shadow:0 0 0 1px rgba(59,130,246,.35)}