/* ============================================================
   Safew — 全站共享样式
   设计系统：深色安全科技风 / 青蓝强调 / 玻璃卡片
   ============================================================ */
:root{
  --bg:#070B14;
  --bg-2:#0B1322;
  --bg-3:#101B30;
  --panel:rgba(255,255,255,.035);
  --panel-2:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.09);
  --border-strong:rgba(255,255,255,.16);
  --text:#EAEFF7;
  --muted:#94A1B8;
  --faint:#6B7890;
  --brand:#2DD4BF;
  --brand-2:#38BDF8;
  --brand-3:#818CF8;
  --good:#34D399;
  --warn:#FBBF24;
  --danger:#F87171;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 24px 60px -24px rgba(0,0,0,.6);
  --container:1180px;
  --nav-h:72px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
h1,h2,h3,h4{line-height:1.25;font-weight:700;letter-spacing:-.01em}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 背景氛围 ---------- */
.aurora{position:fixed;inset:0;z-index:-2;background:
  radial-gradient(900px 500px at 85% -10%,rgba(45,212,191,.14),transparent 60%),
  radial-gradient(800px 500px at 0% 0%,rgba(56,189,248,.12),transparent 55%),
  linear-gradient(180deg,#070B14 0%,#0B1322 100%);}
.grid-lines{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 40%,transparent 100%);}

/* ---------- 顶部导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(7,11,20,.72);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em}
.brand img.brand-logo{height:26px;width:auto;background:#fff;border-radius:7px;padding:4px 10px;display:block;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.foot-brand .brand img.brand-logo{height:30px;padding:5px 12px}
.brand span em{color:var(--brand);font-style:normal}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{padding:9px 16px;border-radius:10px;color:var(--muted);font-size:15px;font-weight:500;transition:.2s}
.nav-links a:hover{color:var(--text);background:var(--panel-2)}
.nav-links a.active{color:var(--text);background:var(--panel-2);box-shadow:inset 0 0 0 1px var(--border)}
.nav-cta{display:flex;gap:10px;align-items:center}
.nav-toggle{display:none;background:none;border:1px solid var(--border);border-radius:10px;width:42px;height:42px;color:var(--text);cursor:pointer;font-size:18px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:12px;font-weight:600;font-size:15px;cursor:pointer;
  border:1px solid transparent;transition:.2s;white-space:remaining}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#04241f;box-shadow:0 10px 30px -10px rgba(45,212,191,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px -12px rgba(45,212,191,.65)}
.btn-ghost{background:var(--panel);border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--border-strong);background:var(--panel-2)}
.btn-lg{padding:16px 32px;font-size:16px;border-radius:14px}
.btn-sm{padding:8px 16px;font-size:14px;border-radius:10px}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- 通用 section ---------- */
.section{padding:96px 0;position:relative}
.section-tight{padding:64px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:16px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px}
.section-head{max-width:680px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center .eyebrow{justify-content:center}
.section-head.center .eyebrow::before{display:none}
.section-head h2{font-size:clamp(28px,4vw,42px);margin-bottom:16px}
.section-head p{color:var(--muted);font-size:17px}

/* ---------- Hero ---------- */
.hero{padding:calc(var(--nav-h) + 72px) 0 80px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(36px,5.2vw,60px);line-height:1.08;letter-spacing:-.02em;margin-bottom:22px}
.hero h1 .grad{background:linear-gradient(120deg,var(--brand),var(--brand-2) 60%,var(--brand-3));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:var(--muted);max-width:540px;margin-bottom:32px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-meta{display:flex;gap:28px;flex-wrap:wrap;color:var(--faint);font-size:14px}
.hero-meta b{color:var(--text);font-weight:700}
.stars{color:var(--warn);letter-spacing:2px}

/* ---------- 产品窗口 mockup ---------- */
.mockup{position:relative;border-radius:18px;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid var(--border);box-shadow:var(--shadow)}
.mockup-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.2)}
.dot{width:11px;height:11px;border-radius:50%}
.dot.r{background:#FF5F57}.dot.y{background:#FEBC2E}.dot.g{background:#28C840}
.mockup-url{flex:1;margin-left:10px;font-size:12px;color:var(--faint);background:rgba(0,0,0,.25);border-radius:6px;padding:4px 12px}
.mockup-body{padding:22px}
.score-ring{width:150px;height:150px;margin:6px auto 18px;position:relative}
.score-ring svg{transform:rotate(-90deg)}
.score-num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.score-num b{font-size:34px;line-height:1}
.score-num span{font-size:11px;color:var(--faint);letter-spacing:.1em}
.bar-row{display:flex;align-items:center;gap:12px;margin:12px 0;font-size:13px}
.bar-row .lbl{width:74px;color:var(--muted);flex-shrink:0}
.track{flex:1;height:8px;background:rgba(255,255,255,.07);border-radius:99px;overflow:hidden}
.track i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--brand-2))}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:4px 10px;border-radius:99px;background:rgba(52,211,153,.12);color:var(--good)}
.pill::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--good)}
.float-card{position:absolute;background:rgba(12,20,36,.92);border:1px solid var(--border-strong);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow);backdrop-filter:blur(8px);font-size:13px;display:flex;gap:10px;align-items:center}
.float-card .ic{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex-shrink:0}
.float-card small{display:block;color:var(--faint);font-size:11px}
.fc-1{top:104px;right:-18px;animation:float 5s ease-in-out infinite}
.fc-2{bottom:-14px;left:-18px;animation:float 6s ease-in-out infinite reverse}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ---------- 数据条 ---------- */
.stats{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:rgba(255,255,255,.02)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:44px 0}
.stat b{display:block;font-size:clamp(28px,3.4vw,40px);font-weight:800;letter-spacing:-.02em;
  background:linear-gradient(120deg,#fff,var(--brand));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:14px}

/* ---------- 特性卡片 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:30px;transition:.25s}
.card:hover{border-color:var(--border-strong);transform:translateY(-3px);background:var(--panel-2)}
.icon-box{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,rgba(45,212,191,.16),rgba(56,189,248,.12));border:1px solid rgba(45,212,191,.25);color:var(--brand)}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}

/* ---------- 图文交替 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:40px 0}
.split .visual{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow)}
.split h3{font-size:clamp(24px,3vw,32px);margin-bottom:16px}
.split p{color:var(--muted);margin-bottom:18px}
.check-list li{display:flex;gap:10px;align-items:flex-start;margin:10px 0;color:var(--text);font-size:15px}
.check-list svg{flex-shrink:0;margin-top:4px;color:var(--brand)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:s}
.step{position:relative;padding:30px;border:1px solid var(--border);border-radius:var(--radius);background:var(--panel)}
.step .num{counter-increment:s;font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.1em}
.step .num::before{content:"0" counter(s)}
.step h4{margin:12px 0 8px;font-size:18px}
.step p{color:var(--muted);font-size:14px}

/* ---------- CTA ---------- */
.cta-band{text-align:center;padding:72px 40px;border-radius:24px;position:relative;overflow:hidden;
  background:linear-gradient(135deg,rgba(45,212,191,.12),rgba(56,189,248,.08));border:1px solid rgba(45,212,191,.25)}
.cta-band h2{font-size:clamp(26px,3.6vw,38px);margin-bottom:14px}
.cta-band p{color:var(--muted);margin-bottom:28px}

/* ---------- Footer ---------- */
footer.site{border-top:1px solid var(--border);background:rgba(0,0,0,.25);margin-top:40px;padding:60px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.foot-grid h5{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.foot-grid a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:.2s}
.foot-grid a:hover{color:var(--brand)}
.foot-brand p{color:var(--faint);font-size:14px;margin-top:14px;max-width:280px}
.foot-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;color:var(--faint);font-size:13px}

/* ---------- 下载页 ---------- */
.page-hero{padding:calc(var(--nav-h) + 64px) 0 40px;text-align:center;max-width:760px;margin:0 auto}
.page-hero h1{font-size:clamp(32px,4.6vw,52px);margin-bottom:16px}
.page-hero p{color:var(--muted);font-size:17px}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.dl-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:32px;display:flex;flex-direction:column;transition:.25s}
.dl-card:hover{border-color:rgba(45,212,191,.4);transform:translateY(-4px)}
.dl-card .os{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;background:var(--panel-2);border:1px solid var(--border);margin-bottom:18px}
.dl-card h3{font-size:21px;margin-bottom:6px}
.dl-card .ver{color:var(--faint);font-size:13px;margin-bottom:18px}
.dl-card .btn{margin-top:auto}
.dl-meta{display:flex;gap:16px;flex-wrap:wrap;margin:14px 0 20px;color:var(--faint);font-size:13px}
.changelog{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.cl-item{padding:24px 28px;border-bottom:1px solid var(--border);display:grid;grid-template-columns:160px 1fr;gap:24px}
.cl-item:last-child{border-bottom:none}
.cl-ver b{font-size:16px}
.cl-ver small{display:block;color:var(--faint);font-size:13px;margin-top:4px}
.cl-list li{color:var(--muted);font-size:14.5px;padding-left:20px;position:relative;margin:6px 0}
.cl-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.req-table{width:100%;border-collapse:collapse}
.req-table th,.req-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border);font-size:14.5px}
.req-table th{color:var(--faint);font-weight:500;width:20%}
.req-table td{color:var(--text)}

/* ---------- FAQ 页 ---------- */
.faq-layout{display:grid;grid-template-columns:220px 1fr;gap:48px;align-items:start}
.faq-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:4px}
.faq-side a{padding:10px 16px;border-radius:10px;color:var(--muted);font-size:15px;border-left:2px solid transparent}
.faq-side a:hover{color:var(--text);background:var(--panel)}
.faq-side a.active{color:var(--brand);border-left-color:var(--brand);background:var(--panel)}
.faq-group{margin-bottom:48px}
.faq-group h3{font-size:22px;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.acc{border:1px solid var(--border);border-radius:14px;margin-bottom:12px;background:var(--panel);overflow:hidden}
.acc-q{width:100%;text-align:left;background:none;border:none;color:var(--text);padding:20px 24px;font-size:16px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:var(--font)}
.acc-q .pm{flex-shrink:0;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;background:var(--panel-2);color:var(--brand);transition:.25s}
.acc.open .pm{transform:rotate(45deg)}
.acc-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.acc-a p{padding:0 24px 20px;color:var(--muted);font-size:15px}
.search-box{display:flex;align-items:center;gap:10px;background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:14px 18px;margin-bottom:36px}
.search-box input{flex:1;background:none;border:none;outline:none;color:var(--text);font-size:15px;font-family:var(--font)}
.search-box input::placeholder{color:var(--faint)}

/* ---------- 机器人页 ---------- */
.robot-hero{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:calc(var(--nav-h)+80px) 0 60px}
.robot-bust{position:relative;border-radius:24px;overflow:hidden;border:1px solid var(--border);background:
  radial-gradient(400px 300px at 50% 20%,rgba(45,212,191,.18),transparent 70%),linear-gradient(180deg,var(--bg-3),var(--bg-2));
  min-height:420px;display:grid;place-items:center}
.chat{max-width:440px;margin:0 auto}
.bubble{padding:14px 18px;border-radius:16px;margin-bottom:12px;font-size:14.5px;max-width:85%}
.bubble.bot{background:var(--panel-2);border:1px solid var(--border);border-bottom-left-radius:4px}
.bubble.me{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#04241f;margin-left:auto;border-bottom-right-radius:4px;font-weight:500}
.chat-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}
.chat-chip{padding:14px;border:1px solid var(--border);border-radius:12px;background:var(--panel);font-size:13.5px;cursor:pointer;transition:.2s;color:var(--text)}
.chat-chip:hover{border-color:var(--brand);background:rgba(45,212,191,.08)}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}

/* ---------- 面包屑 ---------- */
.crumbs{font-size:13px;color:var(--faint);margin-bottom:18px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .hero-grid,.split,.robot-hero{grid-template-columns:1fr;gap:40px}
  .grid-3,.cap-grid,.steps,.dl-grid{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .faq-layout{grid-template-columns:1fr}
  .faq-side{position:static;flex-direction:row;flex-wrap:wrap}
  .faq-side a{border-left:none;border-bottom:2px solid transparent}
  .faq-side a.active{border-bottom-color:var(--brand)}
  .cl-item{grid-template-columns:1fr;gap:8px}
  .nav-links{position:fixed;top:var(--nav-h);left:0;right:0;flex-direction:column;align-items:stretch;
    background:rgba(7,11,20,.98);padding:16px 24px;border-bottom:1px solid var(--border);display:none}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .nav-cta .btn-ghost{display:none}
  .float-card{display:none}
}
@media (max-width:600px){
  .grid-3,.grid-2,.cap-grid,.steps,.dl-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
  .hero{padding-top:calc(var(--nav-h)+40px)}
  .foot-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .mockup-body{padding:16px}
}