/* Weaver 落地页样式 —— 设计令牌与 docs/brand/weaver/brand-guidelines.md 保持一致 */
@font-face { font-family: 'Inter'; src: url('fonts/InterVariable.woff2') format('woff2'); font-weight: 100 900; font-display: swap; }
@font-face { font-family: 'Inter Display'; src: url('fonts/InterDisplay-Bold.woff2') format('woff2'); font-weight: 700; font-display: swap; }

:root {
  --loom-blue: #3B6EFF;
  --thread-violet: #7C5CFF;
  --indigo: #2B3A63;
  --warp-blue: #8FB8FF;
  --ink: #141A2E;
  --text: #141A2E;
  --muted: #5A6178;
  --bg: #F6F7FB;
  --surface: #FFFFFF;
  --line: #E3E6EF;
  --brand-gradient: linear-gradient(135deg, var(--loom-blue) 0%, var(--thread-violet) 100%);
  --loom-blue-600: #2F5DE8;       /* 小号文字/按钮用，白字对比度 5.45:1 */
  --accent-text: #2F5DE8;
  --violet-text: #6B4DEB;
  --radius-s: 8px; --radius-m: 12px; --radius-l: 20px;
  --shadow: 0 30px 80px rgba(43, 58, 99, .16), 0 0 0 1px rgba(20, 26, 46, .06);
  --font: 'Inter', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-display: 'Inter Display', 'Inter', 'PingFang SC', 'Noto Sans SC', system-ui, sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #E8ECF4; --muted: #8B93A7; --bg: #0B0D12; --surface: #12151D; --line: #232836;
    --shadow: 0 30px 80px rgba(0, 0, 0, .5), 0 0 0 1px rgba(255, 255, 255, .06);
    --accent-text: #8FB8FF; --violet-text: #B5A3FF;
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
.container { width: min(1120px, 100% - 48px); margin: 0 auto; }
.muted { color: var(--muted); }
.only-light { display: block; } .only-dark { display: none; }
@media (prefers-color-scheme: dark) { .only-light { display: none; } .only-dark { display: block; } }

/* 按钮 */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: var(--radius-m);
       font-weight: 600; font-size: 15px; text-decoration: none; transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--loom-blue-600); color: #fff; box-shadow: 0 8px 24px rgba(59, 110, 255, .35); }
.btn-ghost { border: 1px solid var(--line); background: var(--surface); }
.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 3px 10px; border-radius: 999px;
         background: rgba(124, 92, 255, .14); color: var(--violet-text); vertical-align: middle; }

/* 导航 */
.nav { position: sticky; top: 0; z-index: 10; backdrop-filter: saturate(1.4) blur(12px);
       background: color-mix(in srgb, var(--bg) 80%, transparent); border-bottom: 1px solid var(--line); }
.nav .container { display: flex; align-items: center; height: 64px; gap: 28px; }
.nav .logo img { height: 28px; }
.nav .links { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.nav .links a { text-decoration: none; color: var(--muted); }
.nav .links a:hover { color: var(--text); }
.nav .btn { padding: 9px 16px; font-size: 14px; }
@media (max-width: 720px) { .nav .links { display: none; } .nav .btn { margin-left: auto; } }

/* 首屏 */
.hero { position: relative; padding: 88px 0 40px; text-align: center; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: -20% -10% auto; height: 620px; z-index: -1;
  background: radial-gradient(50% 60% at 30% 20%, rgba(59, 110, 255, .16), transparent 70%),
              radial-gradient(40% 50% at 75% 30%, rgba(124, 92, 255, .14), transparent 70%); }
.hero h1 { font-size: clamp(40px, 6vw, 68px); }
.hero .lead { max-width: 640px; margin: 20px auto 0; font-size: 19px; color: var(--muted); }
.hero .ctas { display: flex; justify-content: center; gap: 12px; margin-top: 32px; flex-wrap: wrap; }
.hero .note { margin-top: 14px; font-size: 13px; color: var(--muted); }
.shot { margin: 56px auto 0; border-radius: var(--radius-l); overflow: hidden; box-shadow: var(--shadow); max-width: 1080px; }

/* 区块 */
section { padding: 96px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(30px, 4vw, 44px); }
.section-head p { margin-top: 14px; font-size: 18px; color: var(--muted); }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-text); margin-bottom: 12px; }

.pain { padding: 40px 0 0; text-align: center; }
.pain p { font-size: 22px; max-width: 720px; margin: 0 auto; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-l); padding: 28px; }
.card h3 { font-size: 20px; margin: 16px 0 8px; }
.card p { color: var(--muted); font-size: 15.5px; }
.icon-chip { width: 44px; height: 44px; border-radius: var(--radius-m); display: grid; place-items: center;
             background: rgba(59, 110, 255, .12); color: var(--accent-text); }

.split { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: center; }
.split.reverse { grid-template-columns: 1.2fr 1fr; }
.split.reverse .copy { order: 2; }
@media (max-width: 900px) { .split, .split.reverse { grid-template-columns: 1fr; } .split.reverse .copy { order: 0; } }
.split h2 { font-size: clamp(28px, 3.4vw, 40px); }
.split .copy p { margin-top: 16px; font-size: 17px; color: var(--muted); }
.split ul { margin-top: 20px; list-style: none; display: grid; gap: 10px; }
.split li { padding-left: 28px; position: relative; }
.split li::before { content: ''; position: absolute; left: 0; top: 7px; width: 14px; height: 14px; border-radius: 4px;
                    background: var(--brand-gradient); }
.panel { border-radius: var(--radius-l); overflow: hidden; box-shadow: var(--shadow); }

/* AI 整理示意 */
.organize { display: grid; grid-template-columns: 1fr auto 1fr; gap: 18px; align-items: center; padding: 28px;
            background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-l); }
.organize .col { display: grid; gap: 8px; }
.organize .chip { padding: 9px 12px; border-radius: var(--radius-s); background: var(--bg); border: 1px solid var(--line); font-size: 14px;
                  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.organize .group { border-radius: var(--radius-m); overflow: hidden; border: 1px solid var(--line); }
.organize .group b { display: block; padding: 7px 12px; font-size: 13px; color: #141A2E; }
.organize .group span { display: block; padding: 6px 12px; font-size: 13.5px; background: var(--surface); border-top: 1px solid var(--line); }
@media (max-width: 640px) {
  .organize, .sync { grid-template-columns: 1fr; justify-items: stretch; }
  .organize .arrow, .sync > img { justify-self: center; transform: rotate(90deg); }
}
.organize .arrow { width: 44px; height: 44px; border-radius: 50%; background: var(--brand-gradient); color: #fff; display: grid; place-items: center; }

/* 同步示意 */
.sync { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; padding: 32px;
        background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-l); }
.device { border: 1px solid var(--line); border-radius: var(--radius-m); padding: 18px; text-align: center; font-size: 14px; }
.device strong { display: block; font-size: 15px; margin-top: 8px; }
.status { display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; font-size: 13px; color: #16A34A; }
.status::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: #22C55E; }

/* 信任 */
.trust { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.trust .card { background: var(--bg); }

/* 定价 */
.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 880px; margin: 0 auto; }
@media (max-width: 760px) { .pricing { grid-template-columns: 1fr; } }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-l); padding: 32px; display: flex; flex-direction: column; }
.plan.pro { border: 2px solid transparent; background: linear-gradient(var(--surface), var(--surface)) padding-box, var(--brand-gradient) border-box; }
.plan h3 { font-size: 22px; }
.price { margin: 14px 0 4px; font-family: var(--font-display); font-size: 44px; font-weight: 700; }
.price small { font-family: var(--font); font-size: 15px; font-weight: 500; color: var(--muted); }
.plan ul { list-style: none; margin: 22px 0 28px; display: grid; gap: 11px; font-size: 15px; flex: 1; }
.plan li { padding-left: 26px; position: relative; }
.plan li::before { content: '✓'; position: absolute; left: 0; color: var(--accent-text); font-weight: 700; }
.plan .btn { justify-content: center; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::after { content: '+'; color: var(--muted); font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: '–'; }
.faq p { margin-top: 12px; color: var(--muted); }

/* 结尾 CTA */
.final { text-align: center; padding: 96px 0; background: var(--brand-gradient); color: #fff; }
.final h2 { font-size: clamp(30px, 4vw, 46px); }
.final p { margin-top: 12px; opacity: .88; font-size: 18px; }
.final .btn-primary { margin-top: 28px; background: #fff; color: var(--loom-blue-600); box-shadow: 0 10px 30px rgba(10, 14, 40, .25); }

/* 页脚 */
footer { padding: 40px 0 56px; font-size: 14px; color: var(--muted); }
footer .container { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; }
footer .links { display: flex; gap: 22px; margin-left: auto; }
footer a { text-decoration: none; }
footer img { height: 22px; width: auto; }
footer a:hover { color: var(--text); }

/* 法律文本页 */
.legal { padding: 72px 0 96px; }
.legal .container { max-width: 760px; }
.legal h1 { font-size: 40px; }
.legal .updated { margin-top: 8px; color: var(--muted); font-size: 14px; }
.legal h2 { font-size: 22px; margin: 40px 0 12px; }
.legal p, .legal li { color: var(--text); font-size: 16px; }
.legal p + p { margin-top: 12px; }
.legal ul { margin: 12px 0 0 22px; display: grid; gap: 8px; }
.legal table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 15px; }
.legal th, .legal td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.legal .callout { margin-top: 24px; padding: 14px 18px; border-radius: var(--radius-m); background: rgba(245, 158, 11, .12); border: 1px solid rgba(245, 158, 11, .35); font-size: 14.5px; }