/* WA-Checker 官网。版式参考 WADesk 官网：白底、品牌绿、浅绿区块、大标题 + 产品界面示意。 */
:root {
  --green: #2ba44a;
  --green-ink: #1c7a35;
  --green-dark: #0f3d22;
  --mint: #eaf6ee;
  --mint-2: #d7efe0;
  --ink: #17221c;
  --muted: #5b6b62;
  --line: #e2e9e4;
  --radius: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; color: var(--ink); background: #fff; font: 16px/1.7 "Microsoft YaHei", "PingFang SC", -apple-system, "Segoe UI", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
:focus-visible { outline: 3px solid rgba(43, 164, 74, .55); outline-offset: 3px; border-radius: 6px; }
svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.skip { position: absolute; left: -999px; top: 8px; padding: 8px 14px; background: #fff; border: 2px solid var(--green); border-radius: 8px; z-index: 50; }
.skip:focus { left: 12px; }
.fine { color: var(--muted); font-size: 13px; }
.eyebrow { color: var(--green-ink); font-weight: 700; font-size: 14px; margin-bottom: 10px; }
.lead { color: var(--muted); font-size: 17px; max-width: 560px; margin-top: 18px; }
h2 { font-size: 36px; line-height: 1.35; letter-spacing: -.5px; max-width: 820px; }
h3 { font-size: 19px; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 26px; border-radius: 10px; border: 1.5px solid transparent; font-weight: 700; font-size: 15px; cursor: pointer; transition: background .15s, transform .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-ink); }
.btn-ghost { border-color: var(--green); color: var(--green-ink); background: #fff; }
.btn-ghost:hover { background: var(--mint); }
.btn-light { background: #fff; color: var(--green-ink); }
.btn-light:hover { background: var(--mint); }
.btn-sm { padding: 8px 18px; font-size: 14px; }

/* 顶栏 */
.header { position: sticky; top: 0; z-index: 20; background: rgba(255, 255, 255, .94); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav { height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--green-ink); }
.brand-mark { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; background: var(--green); color: #fff; font-size: 12px; font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: 15px; color: #33433a; }
.nav-links a:not(.btn):hover { color: var(--green-ink); }
.lang { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 5px 10px; font: inherit; font-size: 13px; font-weight: 700; cursor: pointer; }
.nav-toggle { display: none; border: 0; background: none; padding: 6px; color: var(--green-ink); cursor: pointer; }

/* 首屏 */
.hero { padding: 72px 0 56px; background: radial-gradient(900px 480px at 85% 0%, var(--mint), transparent 70%); }
.hero-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 48px; align-items: center; }
.hero h1 { font-size: 44px; line-height: 1.35; letter-spacing: -1px; }
.hero h1 span { color: var(--green); white-space: nowrap; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 22px 0 0; }
.chips li { padding: 6px 14px; border-radius: 999px; background: var(--mint); color: var(--green-ink); font-size: 14px; font-weight: 600; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.trust { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 20px; font-size: 13px; color: var(--muted); }
.trust span::before { content: "✓ "; color: var(--green); font-weight: 800; }
/* 首屏的软件界面示意（纯 CSS，和 v0.8 界面同一套布局） */
.shot { margin: 0; }
.shot figcaption { margin-top: 10px; text-align: center; font-size: 12px; color: var(--muted); }
.mock { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #fff; box-shadow: 0 24px 60px rgba(16, 60, 34, .14); font-size: 12px; }
.mock-bar { display: flex; align-items: center; gap: 8px; height: 36px; padding: 0 14px; border-bottom: 1px solid var(--line); font-weight: 700; color: var(--green-ink); }
.mock-logo { width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; background: var(--green); color: #fff; font-size: 8px; }
.mock-sp { flex: 1; }
.mock-bar > :last-child { color: var(--ink); font-weight: 600; }
.mock-body { display: flex; height: 300px; }
.mock-rail, .mock-tools { width: 44px; flex-shrink: 0; display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 12px 0; border-right: 1px solid var(--line); }
.mock-tools { border-right: 0; border-left: 1px solid var(--line); }
.mock-rail i { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-style: normal; font-weight: 700; color: var(--green-ink); border: 2px solid var(--line); background: #f5f8f6; }
.mock-rail i.ok { border-color: var(--green); }
.mock-rail i.warn { border-color: #f5a623; }
.mock-rail i.add { border: 0; background: var(--mint); color: var(--green); }
.mock-tools i { width: 24px; height: 24px; border-radius: 6px; background: #eef3f0; }
.mock-tools i:first-child { background: var(--mint-2); }
.mock-main { flex: 1; min-width: 0; background: #f6f8f7; }
.mock-head { height: 28px; display: grid; place-items: center; background: var(--green); color: #fff; font-weight: 700; }
.mock-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 10px; }
.mock-stats b { display: grid; justify-items: center; padding: 10px 4px; background: #fff; border: 1px solid var(--line); border-radius: 8px; font-size: 18px; }
.mock-stats small { font-size: 10px; font-weight: 400; color: var(--muted); }
.mock-table { margin: 0 10px; background: #fff; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.mock-table .row { display: flex; justify-content: space-between; padding: 7px 12px; border-top: 1px solid var(--line); font-family: Consolas, monospace; }
.mock-table .row.th { border-top: 0; background: #fafcfb; color: var(--muted); font-family: inherit; font-size: 11px; }
.tag { padding: 0 8px; border-radius: 999px; font-family: "Microsoft YaHei", sans-serif; font-size: 11px; font-weight: 600; }
.tag.biz { background: #e6f4ea; color: #1a7f37; }
.tag.per { background: #e8eaf6; color: #3949ab; }

/* 数据条 */
.stats-band { padding: 34px 0 26px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; text-align: center; }
.stats strong { display: block; font-size: 38px; color: var(--green); line-height: 1.2; }
.stats span { color: var(--muted); font-size: 14px; }
.stats-band .fine { margin-top: 18px; text-align: center; }

/* 区块 */
.section { padding: 84px 0; }
.soft { background: linear-gradient(180deg, var(--mint), #f6fbf7); }
.flow { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.flow li { padding: 24px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.flow .no { display: inline-block; margin-bottom: 14px; color: var(--green); font: 800 26px/1 Consolas, monospace; }
.flow h3 { margin-bottom: 8px; }
.flow p, .card p { color: var(--muted); font-size: 15px; }
.tags { list-style: none; padding: 0; margin: 26px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.tags li { padding: 6px 14px; border: 1px solid var(--mint-2); border-radius: 999px; background: #fff; font-size: 14px; color: var(--green-ink); }
.cards { margin-top: 40px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { display: flex; flex-direction: column; gap: 10px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.card .pill { margin-top: auto; align-self: flex-start; padding: 4px 12px; border-radius: 999px; background: var(--mint); color: var(--green-ink); font-size: 13px; font-weight: 600; }

/* 价格 */
.pricing { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.price-card { padding: 34px 36px; border-radius: 20px; background: var(--green); color: #fff; box-shadow: 0 20px 48px rgba(43, 164, 74, .28); }
.plan { font-weight: 700; opacity: .9; }
.price { margin: 6px 0 18px; font-size: 18px; }
.price strong { font-size: 64px; line-height: 1.1; }
.price small { opacity: .85; }
.plan-note { margin: -8px 0 16px; font-size: 14px; opacity: .9; }
.price-card ul { list-style: none; padding: 18px 0; margin: 0 0 22px; border-top: 1px solid rgba(255, 255, 255, .3); display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.price-card li::before { content: "✓ "; font-weight: 800; }
.price-card .btn { width: 100%; }
.plan-foot { margin-top: 12px; font-size: 13px; opacity: .9; text-align: center; }

/* 常见问题 */
.faq { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; }
.faq-list { border-top: 1px solid var(--mint-2); }
details { border-bottom: 1px solid var(--mint-2); }
summary { display: flex; justify-content: space-between; gap: 16px; padding: 20px 0; font-weight: 700; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--green); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { padding: 0 30px 20px 0; color: var(--muted); font-size: 15px; }

/* 下载与联系 */
.cta { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 44px 48px; border-radius: 22px; background: var(--green-dark); color: #fff; }
.cta h2 { font-size: 30px; }
.cta p { margin-top: 10px; color: #c9e6d3; font-size: 15px; max-width: 620px; }
.cta-actions { display: grid; justify-items: center; gap: 10px; flex-shrink: 0; }
.cta .link { color: #c9e6d3; text-decoration: underline; font-size: 14px; }
.contact { padding-top: 0; }
.contact .lead { margin-top: 10px; }
.contact-links { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 22px; }
.contact-btn { display: grid; gap: 2px; min-width: 220px; padding: 14px 22px; border-radius: 12px; color: #fff; font-weight: 800; font-size: 17px; transition: transform .15s; }
.contact-btn span { font-weight: 500; font-size: 14px; opacity: .92; }
.contact-btn:hover { transform: translateY(-1px); }
.contact-btn.tg { background: #229ed9; }
.contact-btn.wa { background: var(--green); }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 26px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer .brand { font-size: 16px; }
.footer .brand-mark { width: 26px; height: 26px; font-size: 10px; }
.footer-links { display: flex; gap: 20px; font-size: 14px; color: var(--muted); }
.footer-links a:hover { color: var(--green-ink); }

/* 窄屏 */
@media (max-width: 980px) {
  .hero-grid, .pricing, .faq { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 40px; }
  .flow { grid-template-columns: 1fr 1fr; }
  .cards { grid-template-columns: 1fr 1fr; }
  .cta { flex-direction: column; align-items: flex-start; padding: 34px 30px; }
  .cta-actions { justify-items: start; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 16px; padding: 20px; background: #fff; border-bottom: 1px solid var(--line); }
  .nav-links.open { display: flex; }
  .hero { padding-top: 44px; }
  .hero h1 { font-size: 30px; }
  .hero h1 span { white-space: normal; }
  h2 { font-size: 27px; }
  .flow, .cards, .stats { grid-template-columns: 1fr; }
  .mock-body { height: 260px; }
  .section { padding: 56px 0; }
  .price-card { padding: 26px; }
  .price-card ul { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } .btn:hover { transform: none; } }