/* ===== Chrome2026 暗色科技风 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg0:#0b0d14;
  --bg1:#12151f;
  --bg2:#1a1e2e;
  --bg3:#232840;
  --glass:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.1);
  --blue:#4285f4;
  --red:#ea4335;
  --yellow:#fbbc04;
  --green:#34a853;
  --grad:linear-gradient(135deg,#4285f4 0%,#34a853 100%);
  --grad2:linear-gradient(135deg,#ea4335 0%,#fbbc04 100%);
  --text:#e8eaf0;
  --muted:#8892a4;
  --font:'Google Sans',system-ui,-apple-system,sans-serif;
}
html{scroll-behavior:smooth}
body{background:var(--bg0);color:var(--text);font-family:var(--font);line-height:1.6;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:999;height:64px;
  background:rgba(11,13,20,.85);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;padding:0 32px;gap:24px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;margin-right:auto}
.nav-logo img{width:32px;height:32px}
.nav-logo span{background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;gap:8px}
.nav-links a{padding:8px 16px;border-radius:8px;font-size:14px;color:var(--muted);
  transition:.2s}
.nav-links a:hover,.nav-links a.active{color:#fff;background:var(--glass)}
.nav-dl{padding:9px 22px;border-radius:8px;font-size:14px;font-weight:600;
  background:var(--grad);color:#fff;transition:.15s}
.nav-dl:hover{opacity:.88;transform:translateY(-1px)}

/* ===== Hero ===== */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;
  text-align:center;padding:100px 24px 60px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 70% 60% at 50% 30%,rgba(66,133,244,.18) 0%,transparent 70%)}
.hero-badge{display:inline-flex;align-items:center;gap:8px;
  padding:6px 18px;border-radius:100px;
  background:rgba(66,133,244,.15);border:1px solid rgba(66,133,244,.35);
  font-size:13px;color:var(--blue);margin-bottom:28px}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--green);
  box-shadow:0 0 8px var(--green)}
.hero h1{font-size:clamp(38px,6vw,76px);font-weight:700;line-height:1.12;margin-bottom:24px}
.hero h1 .g{color:var(--blue)}
.hero h1 .o1{color:var(--red)}
.hero h1 .o2{color:var(--yellow)}
.hero h1 .g2{color:var(--green)}
.hero h1 .l{color:var(--blue)}
.hero h1 .e{color:var(--red)}
.hero-sub{font-size:18px;color:var(--muted);max-width:560px;margin:0 auto 40px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{padding:16px 40px;border-radius:12px;font-size:16px;font-weight:700;
  background:var(--grad);color:#fff;border:none;cursor:pointer;
  transition:.2s;box-shadow:0 0 32px rgba(66,133,244,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 48px rgba(66,133,244,.55)}
.btn-ghost{padding:16px 32px;border-radius:12px;font-size:16px;font-weight:600;
  background:var(--glass);color:#fff;border:1px solid var(--border);
  transition:.2s}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.25)}
.hero-stats{display:flex;gap:48px;justify-content:center;margin-top:56px;flex-wrap:wrap}
.hero-stats .s{text-align:center}
.hero-stats .s strong{display:block;font-size:32px;font-weight:700;
  background:var(--grad);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-stats .s span{font-size:13px;color:var(--muted)}

/* ===== Section通用 ===== */
section{padding:80px 24px}
.container{max-width:1100px;margin:0 auto}
.sec-label{font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;
  color:var(--blue);margin-bottom:12px}
.sec-title{font-size:clamp(26px,3.5vw,40px);font-weight:700;margin-bottom:16px}
.sec-sub{font-size:16px;color:var(--muted);max-width:560px;margin-bottom:48px}

/* ===== 特色带 ===== */
.strip{background:var(--bg1);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.strip-inner{display:flex;justify-content:space-around;align-items:center;
  padding:28px 0;flex-wrap:wrap;gap:20px}
.strip-item{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600}
.strip-item .dot{width:8px;height:8px;border-radius:50%}
.d-blue{background:var(--blue)}
.d-green{background:var(--green)}
.d-yellow{background:var(--yellow)}
.d-red{background:var(--red)}

/* ===== 卡片网格 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card{background:var(--bg2);border:1px solid var(--border);border-radius:16px;
  padding:28px;transition:.25s}
.card:hover{border-color:rgba(66,133,244,.4);transform:translateY(-3px);
  box-shadow:0 12px 40px rgba(0,0,0,.4)}
.card-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;
  justify-content:center;font-size:22px;margin-bottom:16px}
.ic-blue{background:rgba(66,133,244,.15)}
.ic-green{background:rgba(52,168,83,.15)}
.ic-red{background:rgba(234,67,53,.15)}
.ic-yellow{background:rgba(251,188,4,.15)}
.card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.card p{font-size:14px;color:var(--muted);line-height:1.7}

/* ===== 下载区 ===== */
.dl-hero{background:var(--bg1);border-radius:20px;padding:48px;text-align:center;
  border:1px solid var(--border);margin-bottom:40px;position:relative;overflow:hidden}
.dl-hero::before{content:'';position:absolute;inset:0;
  background:radial-gradient(ellipse 60% 80% at 50% 0%,rgba(66,133,244,.12) 0%,transparent 70%)}
.dl-hero *{position:relative}
.dl-hero h2{font-size:36px;font-weight:700;margin-bottom:12px}
.dl-hero p{color:var(--muted);margin-bottom:32px}
.dl-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.dl-card{background:var(--bg2);border:1px solid var(--border);border-radius:14px;
  padding:24px 16px;text-align:center;transition:.2s}
.dl-card:hover{border-color:rgba(66,133,244,.5);box-shadow:0 8px 32px rgba(66,133,244,.15)}
.dl-card .os-icon{font-size:36px;margin-bottom:12px}
.dl-card h4{font-size:15px;font-weight:700;margin-bottom:6px}
.dl-card .ver{font-size:12px;color:var(--muted);margin-bottom:16px}
.btn-dl{display:inline-block;padding:10px 24px;border-radius:8px;font-size:14px;
  font-weight:600;background:var(--grad);color:#fff;transition:.15s}
.btn-dl:hover{opacity:.85}

/* ===== 表格 ===== */
.tbl{width:100%;border-collapse:collapse;margin-top:24px}
.tbl th{background:var(--bg3);padding:14px 16px;text-align:left;font-size:13px;
  font-weight:600;color:var(--muted);border-bottom:1px solid var(--border)}
.tbl td{padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.05);font-size:14px}
.tbl tr:hover td{background:rgba(255,255,255,.03)}
.tag-yes{color:var(--green);font-weight:600}
.tag-no{color:var(--muted)}
.tag-part{color:var(--yellow)}

/* ===== FAQ ===== */
.faq-item{border:1px solid var(--border);border-radius:12px;margin-bottom:12px;
  overflow:hidden}
.faq-q{padding:18px 20px;font-weight:600;font-size:15px;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;
  background:var(--bg2);transition:.2s}
.faq-q:hover{background:var(--bg3)}
.faq-q::after{content:'+';font-size:20px;color:var(--blue);flex-shrink:0}
.faq-a{padding:0 20px 18px;font-size:14px;color:var(--muted);line-height:1.8;
  background:var(--bg2)}

/* ===== 步骤 ===== */
.steps{counter-reset:step;display:flex;flex-direction:column;gap:16px}
.step{display:flex;gap:20px;align-items:flex-start;
  background:var(--bg2);border:1px solid var(--border);border-radius:14px;padding:20px 24px}
.step::before{counter-increment:step;content:counter(step);
  width:36px;height:36px;border-radius:50%;background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:#fff;flex-shrink:0}
.step-body h4{font-weight:700;margin-bottom:4px}
.step-body p{font-size:14px;color:var(--muted)}

/* ===== CTA横幅 ===== */
.cta-band{background:var(--grad);border-radius:20px;padding:48px;text-align:center;margin:40px 0}
.cta-band h2{font-size:32px;font-weight:700;color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.8);margin-bottom:28px}
.btn-white{padding:14px 36px;border-radius:10px;background:#fff;
  font-size:15px;font-weight:700;color:#1a1e2e;border:none;cursor:pointer;transition:.15s}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}

/* ===== 页脚 ===== */
footer{background:var(--bg1);border-top:1px solid var(--border);padding:48px 24px 28px}
.footer-inner{max-width:1100px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand .logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;margin-bottom:12px}
.footer-brand .logo img{width:28px}
.footer-brand p{font-size:13px;color:var(--muted);line-height:1.8}
.footer-col h5{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:1px;
  color:var(--muted);margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:3px 0;transition:.15s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:13px;color:var(--muted)}
.coop{font-size:13px;color:var(--muted)}
.coop a{color:var(--blue)}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .dl-cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .nav-links{display:none}
  .grid-3,.grid-2,.dl-cards{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:36px}
  .hero-stats{gap:28px}
  .hero-stats .s strong{font-size:24px}
}