/* ===== 零克数据 官网样式 ===== */
:root{
  --brand:#ff2d4b;
  --brand-dark:#e01e3c;
  --brand-soft:#fff1f3;
  --ink:#1a1b2f;
  --muted:#6b7280;
  --bg:#ffffff;
  --bg-soft:#f7f8fa;
  --line:#ececf1;
  --radius:16px;
  --shadow:0 8px 30px rgba(26,27,47,.08);
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
img{max-width:100%;display:block}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-weight:600;
  padding:12px 22px;border-radius:999px;cursor:pointer;transition:.2s;border:1px solid transparent;font-size:15px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(255,45,75,.28)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-lg{padding:15px 30px;font-size:17px}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.brand-logo{height:34px;width:auto;max-width:120px;object-fit:contain}
.brand-name{letter-spacing:.5px}
.nav-links{display:flex;align-items:center;gap:26px;font-size:15px}
.nav-links a{color:var(--ink);font-weight:500;transition:.2s}
.nav-links a:hover{color:var(--brand)}
.nav-links a.btn-primary{color:#fff}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--ink)}

/* Hero */
.hero{padding:64px 0 72px;background:
  radial-gradient(900px 420px at 85% -10%,var(--brand-soft),transparent 60%),
  linear-gradient(180deg,#fff,var(--bg-soft))}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-block;color:var(--brand);background:var(--brand-soft);
  padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:18px}
.hero h1{font-size:56px;line-height:1.05;font-weight:800;letter-spacing:1px}
.hero-sub{font-size:24px;font-weight:700;color:var(--brand);margin:8px 0 18px}
.hero-desc{font-size:17px;color:var(--muted);max-width:520px}
.hero-desc strong{color:var(--ink)}
.hero-cta{display:flex;gap:14px;margin:28px 0 22px;flex-wrap:wrap}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;list-style:none}
.hero-badges li{font-size:13px;color:var(--muted);background:#fff;border:1px solid var(--line);
  padding:6px 12px;border-radius:999px}

/* 浏览器示意 */
.hero-art{display:flex;justify-content:center}
.browser{width:100%;max-width:440px;background:#fff;border-radius:14px;box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--line)}
.browser-bar{display:flex;align-items:center;gap:6px;padding:10px 14px;background:#f3f4f6}
.dot{width:10px;height:10px;border-radius:50%}
.dot.r{background:#ff5f57}.dot.y{background:#febc2e}.dot.g{background:#28c840}
.browser-url{margin-left:10px;font-size:12px;color:#9aa0a6;background:#fff;padding:3px 10px;border-radius:6px}
.browser-body{padding:8px 0}
.row{display:grid;grid-template-columns:1.1fr 1.6fr .8fr .7fr .8fr;gap:6px;padding:10px 14px;font-size:12.5px;border-bottom:1px solid #f2f3f5}
.row.head{font-weight:700;color:var(--muted);background:#fafbfc;font-size:11.5px}
.row.fail{background:#fff6f6;color:#b42318}
.tag-fail{color:#fff;background:var(--brand);padding:2px 8px;border-radius:6px;font-size:11px}

/* 区块通用 */
.section{padding:72px 0}
.section-soft{background:var(--bg-soft)}
.section-head{text-align:center;max-width:680px;margin:0 auto 44px}
.section-head h2{font-size:34px;font-weight:800}
.section-head p{color:var(--muted);margin-top:10px;font-size:16px}

/* 功能卡片 */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#ffd5dc}
.card-ic{font-size:30px;margin-bottom:12px}
.card h3{font-size:17px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;position:relative}
.step-no{width:38px;height:38px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14.5px}

/* 下载 */
.download-card{display:grid;grid-template-columns:1fr 1fr;gap:36px;background:#fff;border:1px solid var(--line);
  border-radius:22px;padding:40px;box-shadow:var(--shadow);align-items:center}

/* 下载前激活提示 */
.activate-notice{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;
  background:var(--brand-soft);border:1px solid #ffd0d8;border-left:5px solid var(--brand);
  border-radius:16px;padding:22px 28px;margin-bottom:28px}
.an-text{display:flex;gap:16px;align-items:flex-start}
.an-icon{font-size:30px;line-height:1;flex-shrink:0;margin-top:2px}
.activate-notice h3{font-size:20px;margin-bottom:6px;color:var(--ink)}
.activate-notice p{color:#475467;font-size:15px;margin-bottom:14px}
.activate-notice p strong{color:var(--brand-dark)}
.an-qr{text-align:center;flex-shrink:0}
.an-qr img{width:124px;height:124px;border-radius:12px;background:#fff;padding:8px;box-shadow:var(--shadow)}
.an-qr-empty{width:124px;height:124px;border-radius:12px;background:#fff;border:1px dashed #ffb3bd;
  display:flex;align-items:center;justify-content:center;text-align:center;color:var(--brand);
  font-weight:700;font-size:14px;line-height:1.5;margin:0 auto}
.an-qr p{font-size:13px;color:var(--brand-dark);margin-top:8px;font-weight:600}
.dl-activate-tip{background:#fff8f0;border:1px solid #ffe3c2;color:#9a5b16;
  padding:11px 15px;border-radius:10px;font-size:14px;margin:0 0 18px}
.dl-activate-tip strong{color:var(--brand-dark)}
.dl-badge{display:inline-block;background:var(--brand-soft);color:var(--brand);font-weight:700;
  padding:6px 14px;border-radius:999px;font-size:13px;margin-bottom:14px}
.dl-info h3{font-size:24px;margin-bottom:8px}
.dl-meta{color:var(--muted);font-size:14px;margin-bottom:22px}
.dl-tip{color:var(--muted);font-size:13px;margin-top:12px}
.dl-steps{margin:0;padding-left:20px;color:var(--muted);font-size:14.5px}
.dl-steps li{margin-bottom:12px}
.dl-steps code{background:var(--bg-soft);padding:2px 6px;border-radius:5px;font-size:13px;color:var(--brand-dark)}
.disclaimer{margin-top:26px;background:#fff8f0;border:1px solid #ffe3c2;color:#9a5b16;
  padding:14px 18px;border-radius:12px;font-size:14px}

/* 更新日志 */
.timeline{max-width:820px;margin:0 auto;position:relative;padding-left:8px}
.tl-item{border-left:3px solid var(--brand-soft);padding:0 0 28px 26px;position:relative}
.tl-item::before{content:"";position:absolute;left:-8px;top:4px;width:13px;height:13px;border-radius:50%;
  background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 2px var(--brand-soft)}
.tl-ver{font-size:19px;font-weight:800;margin-bottom:8px;display:flex;align-items:baseline;gap:12px}
.tl-date{font-size:13px;color:var(--muted);font-weight:500}
.tl-item ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.tl-item li{position:relative;padding-left:18px;color:#374151;font-size:15px}
.tl-item li::before{content:"›";position:absolute;left:0;color:var(--brand);font-weight:800}

/* 页脚 */
.footer{background:#15162b;color:#c9cbd8;padding:56px 0 0}
.footer-inner{display:grid;grid-template-columns:1.2fr 2fr;gap:40px;padding-bottom:40px}
.footer-brand{display:flex;gap:14px;align-items:center}
.footer-logo{height:48px;width:auto;max-width:140px;object-fit:contain}
.footer-name{font-size:20px;font-weight:800;color:#fff}
.footer-tag{font-size:13px;color:#9aa0b5}
.footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col a{display:block;color:#c9cbd8;font-size:14px;margin-bottom:10px;transition:.2s}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;font-size:13px;color:#8b90a6;text-align:center}
.disclaimer-sm{max-width:760px;margin:0 auto 10px;line-height:1.6;color:#8b90a6}
.footer-qr .qr-img{width:96px;height:96px;border-radius:10px;background:#fff;padding:6px;margin-bottom:8px}
.footer-qr .qr-tip{font-size:12px;color:#9aa0b5;line-height:1.5;margin:0}

/* 响应式 */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:32px}
  .hero h1{font-size:42px}
  .grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .download-card{grid-template-columns:1fr;padding:28px}
  .activate-notice{grid-template-columns:1fr;gap:18px;text-align:center;padding:22px}
  .an-text{flex-direction:column;align-items:center;text-align:center}
  .an-icon{margin-top:0}
  .footer-inner{grid-template-columns:1fr;gap:28px}
  .nav-links{position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:10px 20px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--line);width:100%}
  .nav-toggle{display:block}
}
@media(max-width:560px){
  .grid{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr 1fr}
  .hero h1{font-size:36px}
  .section-head h2{font-size:28px}
}