/* ==========================================================================
   模板 03 · 亮色风
   特点：白底大间距、居中 Hero、浏览器界面示意、资质表格、蓝色 CTA 区
   ========================================================================== */

:root {
  --bg: #ffffff;
  --soft: #f5f7fb;
  --panel: #ffffff;
  --line: #e6eaf2;
  --line-2: #d5dbe8;
  --text: #101828;
  --dim: #475467;
  --mute: #8592a6;
  --brand: #2f54eb;
  --brand-2: #1d39c4;
  --ok: #12b76a;
  --warn: #f79009;
  --up: #12b76a;
  --down: #f04438;
  --maxw: 1160px;
  --shadow-sm: 0 2px 6px rgba(16, 24, 40, 0.06);
  --shadow: 0 20px 44px -28px rgba(16, 24, 40, 0.28);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.7; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
svg { display: block; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 880px; }
.section { padding: 92px 0; }
.soft { background: var(--soft); }
.head { max-width: 680px; margin: 0 auto 52px; text-align: center; }
.head h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; letter-spacing: -0.6px; line-height: 1.3; }
.head p { margin-top: 12px; color: var(--dim); }
.kicker { display: inline-block; margin-bottom: 12px; font-size: 13px; font-weight: 700; letter-spacing: 1px; color: var(--brand); text-transform: uppercase; }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--brand); background: #eef2ff; }
.up { color: var(--up); } .down { color: var(--down); } .ok { color: var(--ok); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 22px; border-radius: 10px; font-size: 15px; font-weight: 600; transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-lg { padding: 14px 30px; font-size: 16px; }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 12px 26px -14px rgba(47, 84, 235, 0.7); }
.btn-primary:hover { background: var(--brand-2); }
.btn-ghost { border: 1px solid var(--line-2); color: var(--text); background: #fff; }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-white { background: #fff; color: var(--brand); }
.btn-white-outline { border: 1px solid rgba(255, 255, 255, 0.6); color: #fff; }

/* 导航 */
.header { position: sticky; top: 0; z-index: 40; background: rgba(255, 255, 255, 0.9); backdrop-filter: blur(12px); border-bottom: 1px solid transparent; transition: border-color 0.25s ease, box-shadow 0.25s ease; }
.header.is-stuck { border-bottom-color: var(--line); box-shadow: 0 8px 24px -22px rgba(16, 24, 40, 0.5); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; letter-spacing: -0.2px; }
.brand em { margin-left: 6px; font-style: normal; font-size: 11px; font-weight: 700; color: var(--brand); background: #eef2ff; padding: 2px 8px; border-radius: 999px; }
.brand-mark { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 9px; background: var(--brand); color: #fff; font-weight: 900; }
.menu { display: flex; gap: 26px; }
.menu a { font-size: 15px; color: var(--dim); }
.menu a:hover { color: var(--brand); }
.header-cta { display: flex; align-items: center; gap: 10px; }
.lang { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--line-2); font-size: 13.5px; color: var(--dim); }
.burger { display: none; width: 40px; height: 40px; border: 1px solid var(--line-2); border-radius: 10px; padding: 10px; }
.burger i { display: block; height: 2px; background: var(--text); border-radius: 2px; margin: 3px 0; transition: 0.25s; }
.burger.is-open i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.burger.is-open i:nth-child(2) { opacity: 0; }
.burger.is-open i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.mobile { display: none; padding: 14px 24px 22px; border-top: 1px solid var(--line); background: #fff; }
.mobile a { display: block; padding: 12px 0; color: var(--dim); border-bottom: 1px solid var(--line); }
.mobile .btn { margin-top: 16px; border-bottom: 0; }
.mobile.is-open { display: block; }

/* Hero */
.hero { padding: 84px 0 72px; background: linear-gradient(180deg, #f7f9ff, #ffffff 62%); }
.hero-inner { text-align: center; }
.hero h1 { margin: 22px auto 18px; font-size: clamp(30px, 4.6vw, 54px); font-weight: 900; line-height: 1.18; letter-spacing: -1.2px; }
.hero h1 span { color: var(--brand); }
.hero-inner > p { max-width: 660px; margin: 0 auto; color: var(--dim); font-size: 17px; }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* 浏览器界面示意 */
.browser { position: relative; max-width: 980px; margin: 54px auto 0; border-radius: 16px; overflow: hidden; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); text-align: left; }
.browser-bar { display: flex; align-items: center; gap: 14px; padding: 12px 16px; background: var(--soft); border-bottom: 1px solid var(--line); }
.dots { display: flex; gap: 6px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: #e0e4ee; }
.dots i:first-child { background: #ffbdbd; } .dots i:nth-child(2) { background: #ffe2b5; } .dots i:nth-child(3) { background: #c8f0d6; }
.url { flex: 1; padding: 5px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--line); font-size: 12.5px; color: var(--mute); }
.browser-body { display: grid; grid-template-columns: 62px 1fr; min-height: 340px; }
.app-side { padding: 18px 0; border-right: 1px solid var(--line); display: grid; gap: 14px; justify-items: center; }
.side-item { width: 26px; height: 26px; border-radius: 8px; background: var(--soft); }
.side-item.on { background: #e5eaff; box-shadow: inset 0 0 0 1px #c7d2ff; }
.app-main { padding: 22px; display: grid; gap: 18px; }
.app-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.mini { padding: 14px 16px; border-radius: 12px; border: 1px solid var(--line); background: var(--soft); }
.mini span { display: block; font-size: 12.5px; color: var(--mute); }
.mini b { display: block; margin: 4px 0 2px; font-size: 18px; }
.mini i { font-style: normal; font-size: 12.5px; color: var(--mute); }
.chart { border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.chart svg { width: 100%; height: 140px; }
.table-mock { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-size: 13.5px; }
.tr { display: grid; grid-template-columns: 1.4fr 1fr 0.8fr; padding: 10px 14px; border-top: 1px solid var(--line); }
.tr:first-child { border-top: 0; }
.tr.head { background: var(--soft); color: var(--mute); font-size: 12.5px; }
.browser-note { position: absolute; right: 14px; bottom: 12px; font-size: 12px; color: var(--mute); background: rgba(255, 255, 255, 0.9); padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); }

/* 信任条 */
.trust { border-block: 1px solid var(--line); background: #fff; }
.trust-inner { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; padding-block: 18px; font-size: 13.5px; color: var(--mute); }
.trust ul { display: flex; gap: 26px; flex-wrap: wrap; }
.trust li { color: var(--dim); font-weight: 600; }

/* 功能卡片 */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { padding: 28px 24px; border-radius: 16px; background: var(--panel); border: 1px solid var(--line); box-shadow: var(--shadow-sm); transition: transform 0.25s ease, box-shadow 0.25s ease; }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.ico { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px; background: #eef2ff; font-size: 20px; }
.card h3 { margin: 16px 0 8px; font-size: 17px; }
.card p { font-size: 14.5px; color: var(--dim); }

/* 数据 */
.band { background: #f7f9ff; border-block: 1px solid var(--line); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; text-align: center; }
.stats b { display: block; font-size: clamp(28px, 3.6vw, 40px); font-weight: 900; letter-spacing: -1px; color: var(--brand); }
.stats span { font-size: 14px; color: var(--mute); }

/* 安全与资质 */
.sec-split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.sec-list { display: grid; gap: 16px; }
.sec-item { display: flex; gap: 16px; padding: 20px; border-radius: 14px; border: 1px solid var(--line); background: var(--panel); box-shadow: var(--shadow-sm); }
.dot { flex: none; width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; background: #eef2ff; color: var(--brand); font-weight: 800; font-size: 14px; }
.sec-item h3 { font-size: 16px; }
.sec-item p { font-size: 14.5px; color: var(--dim); }
.table-card { padding: 24px; border-radius: 16px; border: 1px solid var(--line); background: var(--panel); box-shadow: var(--shadow); }
.table-card caption { text-align: left; font-weight: 700; padding-bottom: 14px; }
.table-card table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.table-card th, .table-card td { padding: 12px 8px; border-top: 1px solid var(--line); text-align: left; vertical-align: top; }
.table-card th { width: 42%; color: var(--mute); font-weight: 500; }
.table-note { margin-top: 14px; font-size: 12.5px; color: var(--mute); }

/* 步骤 */
.steps { counter-reset: s; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { position: relative; padding: 28px 24px; border-radius: 16px; background: var(--panel); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.steps .no { position: absolute; top: -14px; left: 24px; width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 800; }
.steps h3 { margin: 10px 0 8px; font-size: 17px; }
.steps p { font-size: 14.5px; color: var(--dim); }
.steps-note { margin-top: 22px; font-size: 13px; color: var(--mute); text-align: center; }

/* FAQ */
.faq { display: grid; gap: 12px; }
.faq details { border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: var(--shadow-sm); overflow: hidden; }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 22px; font-size: 16px; font-weight: 600; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; color: var(--brand); font-weight: 700; transition: transform 0.25s ease; }
.faq details[open] summary::after { content: "－"; }
.faq p { padding: 0 22px 20px; color: var(--dim); font-size: 15px; }

/* CTA */
.cta { background: linear-gradient(120deg, var(--brand), #4c6ef5 60%, #7048e8); color: #fff; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; padding-block: 60px; }
.cta h2 { font-size: clamp(24px, 3.2vw, 34px); font-weight: 900; letter-spacing: -0.6px; }
.cta p { margin-top: 10px; color: rgba(255, 255, 255, 0.85); max-width: 520px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.qr { text-align: center; }
.qr svg { width: 148px; height: 148px; padding: 8px; border-radius: 14px; background: #fff; }
.qr span { display: block; margin-top: 8px; font-size: 12.5px; color: rgba(255, 255, 255, 0.85); }

/* 页脚 */
.footer { padding: 56px 0 26px; background: var(--soft); border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 30px; }
.footer-grid p { margin-top: 12px; font-size: 14px; color: var(--mute); max-width: 320px; }
.footer h4 { margin-bottom: 14px; font-size: 14px; }
.footer ul { display: grid; gap: 10px; }
.footer ul a { font-size: 14px; color: var(--dim); }
.footer ul a:hover { color: var(--brand); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 38px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13px; color: var(--mute); }

/* 响应式 */
@media (max-width: 1024px) {
  .menu, .header-cta .lang, .header-cta .btn-ghost { display: none; }
  .burger { display: block; }
  .sec-split { grid-template-columns: 1fr; }
  .grid-3, .steps { grid-template-columns: repeat(2, 1fr); }
  .app-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .section { padding: 64px 0; }
  .hero { padding: 56px 0 52px; }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 26px; }
  .browser-body { grid-template-columns: 1fr; }
  .app-side { display: none; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .grid-3, .steps { grid-template-columns: 1fr; }
  .trust ul { gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-inner { padding-block: 46px; }
  .hero-actions .btn { width: 100%; }
}

/* =========================================================
   Mobile / desktop responsive fixes (appended)
   1) anchor jump offset under sticky header
   2) larger touch targets for nav & footer links
   3) 16px form controls to avoid iOS focus zoom
   ========================================================= */
:where(section, article, div, main)[id] {
  scroll-margin-top: 92px;
}

@media (max-width: 900px) {
  .mobile-nav a,
  .mobile-menu a,
  #mobile a,
  #dockMobile a,
  .menu a {
    min-height: 46px;
    display: flex;
    align-items: center;
  }

  .mobile-nav a + a,
  .mobile-menu a + a,
  #mobile a + a,
  #dockMobile a + a {
    border-top: 1px solid rgba(127, 127, 127, 0.18);
  }

  footer a,
  .footer a,
  .footer-grid a,
  .footer-links a,
  .site-footer a {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
  }

  input,
  select,
  textarea {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  footer a,
  .footer a,
  .footer-grid a,
  .footer-links a,
  .site-footer a {
    min-height: 40px;
  }
}
/* force 16px form controls on small screens (prevents iOS focus zoom) */
@media (max-width: 900px) {
  input, select, textarea { font-size: 16px !important; }
}

/* ===== 手机端两列优化：功能卡片（6 张卡 = 2 列 3 行） ===== */
@media (max-width: 520px) {
  #features .grid-3 { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  #features .card { padding: 20px 16px; }
  #features .card h3 { font-size: 15.5px; }
  #features .card p { font-size: 13.5px; }
  #features .ico { width: 40px; height: 40px; font-size: 18px; }
}

/* ===== 手机端页脚紧凑版：产品 各占一行（标题与链接同行） ===== */
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 14px; }
  .footer .footer-bottom { margin-top: 16px; padding-top: 10px; gap: 6px 14px; }
  .footer .footer-bottom a { min-height: 0; }
  .footer-grid > div + div {
    display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px;
    padding-top: 12px; border-top: 1px solid rgba(128, 128, 128, 0.18);
  }
  .footer-grid > div + div h4 { margin: 0 8px 0 0; font-size: 13.5px; }
  .footer-grid > div + div ul { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 0; }
  .footer-grid > div + div ul li { margin: 0; }
  .footer-grid > div + div ul a { font-size: 13px; }
}

/* ===== 手机端整体压缩（方案A）：区块间距统一 40px ===== */
@media (max-width: 1024px) {
  .section { padding: 40px 0; }
  .footer { padding: 36px 0 20px; }
}

/* ===== H1 上提：收紧首屏上方留白 ===== */
.hero { padding-top: 40px; }
.hero h1 { margin-top: 0; }
@media (max-width: 760px) { .hero { padding-top: 18px; } }

/* ===== 资质表删除后：安全区改单栏 ===== */
.sec-split { grid-template-columns: 1fr; }

/* ===== 桌面端区块间距压缩（原来 92px，现 48px） ===== */
@media (min-width: 1025px) {
  .section { padding: 48px 0; }
  .footer { padding: 40px 0 22px; }
}

/* ===== 导航下载按钮缩小 ===== */
.header-cta .btn-primary { padding: 9px 18px; font-size: 14px; }

/* ===== 下载按钮「下载」两字保持左右排列，不换行 ===== */
.header-cta .btn-primary { white-space: nowrap; }

/* ===== 手机端：删除首屏与下方区块之间的多余空白 ===== */
@media (max-width: 820px) {
  .hero { padding-bottom: 40px; }
}