:root {
  --blue: #3567f6;
  --blue-dark: #214ed1;
  --blue-soft: #edf3ff;
  --navy: #111d38;
  --ink: #17213a;
  --muted: #68748b;
  --line: #e4e9f2;
  --surface: #f6f8fc;
  --white: #fff;
  --orange: #ff7a2f;
  --shadow: 0 24px 70px rgba(29, 62, 143, .14);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Inter, system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }
.page-top { position: absolute; inset: 0 auto auto 0; width: 1px; height: 1px; pointer-events: none; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 200; padding: 12px 18px; background: #fff; border-radius: 8px; box-shadow: var(--shadow); }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.86);
  border-bottom: 1px solid rgba(228,233,242,.8);
  backdrop-filter: blur(18px);
}
.nav-wrap { height: 78px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand img { width: 46px; height: 46px; border-radius: 13px; box-shadow: 0 8px 18px rgba(53,103,246,.22); }
.brand span { display: flex; flex-direction: column; line-height: 1.15; }
.brand strong { font-size: 22px; letter-spacing: .04em; }
.brand small { color: var(--muted); font-size: 12px; margin-top: 4px; }
.site-nav { display: flex; align-items: center; gap: 34px; color: #45516b; font-size: 15px; font-weight: 600; }
.site-nav a { transition: color .2s ease; }
.site-nav a:hover { color: var(--blue); }
.site-nav .nav-download { padding: 12px 20px; color: #fff; background: var(--blue); border-radius: 12px; box-shadow: 0 10px 24px rgba(53,103,246,.22); }
.site-nav .nav-download:hover { color: #fff; background: var(--blue-dark); }
.menu-toggle { display: none; border: 0; background: transparent; font-weight: 700; }

.hero { position: relative; min-height: 720px; overflow: hidden; background: linear-gradient(145deg, #f8faff 0%, #f4f7ff 58%, #edf3ff 100%); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .4; background-image: radial-gradient(#b9c9f5 1px, transparent 1px); background-size: 28px 28px; mask-image: linear-gradient(to bottom, #000, transparent 80%); }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(10px); opacity: .5; }
.hero-glow-one { width: 540px; height: 540px; right: -180px; top: -250px; background: rgba(70,119,255,.22); }
.hero-glow-two { width: 320px; height: 320px; left: -180px; bottom: -130px; background: rgba(110,211,255,.16); }
.hero-grid { position: relative; display: grid; grid-template-columns: .92fr 1.08fr; gap: 70px; align-items: center; min-height: 670px; padding: 66px 0 80px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; padding: 8px 13px; color: var(--blue-dark); background: #eaf0ff; border: 1px solid #d9e4ff; border-radius: 999px; font-size: 13px; font-weight: 700; }
.eyebrow span { width: 7px; height: 7px; background: var(--blue); border-radius: 50%; box-shadow: 0 0 0 5px rgba(53,103,246,.12); }
.hero h1 { margin: 24px 0 22px; color: #101a33; font-size: clamp(42px, 4.7vw, 60px); line-height: 1.14; letter-spacing: -.05em; }
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lead { max-width: 610px; margin: 0; color: #5c6880; font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; gap: 14px; margin: 34px 0 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 54px; padding: 0 25px; border-radius: 14px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: linear-gradient(135deg, #4778ff, #2f5be3); box-shadow: 0 15px 32px rgba(53,103,246,.27); }
.button-primary:hover { box-shadow: 0 18px 40px rgba(53,103,246,.34); }
.button-primary span { font-size: 22px; }
.button-ghost { color: #354158; background: rgba(255,255,255,.78); border: 1px solid #dce4f2; }
.trust-row { display: flex; flex-wrap: wrap; gap: 18px; color: #6b768b; font-size: 13px; }
.trust-row span::first-letter { color: var(--blue); }

.product-stage { position: relative; padding: 28px 0 40px 30px; }
.app-window { position: relative; overflow: hidden; background: #fff; border: 1px solid rgba(206,216,235,.9); border-radius: 24px; box-shadow: 0 32px 80px rgba(36,70,152,.19), 0 1px 0 #fff inset; transform: rotate(1deg); }
.window-bar { height: 52px; display: flex; align-items: center; justify-content: space-between; padding: 0 19px; background: #edf5f9; border-bottom: 1px solid #e3eaf2; }
.window-title { display: flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 700; }
.window-title img { width: 23px; height: 23px; border-radius: 6px; }
.window-controls { display: flex; gap: 8px; }
.window-controls i { width: 10px; height: 10px; border-radius: 50%; background: #d0d7e3; }
.window-body { padding: 24px; background: #fff; }
.app-brand { display: flex; align-items: center; gap: 15px; }
.app-brand img { width: 76px; height: 76px; border-radius: 20px; }
.app-brand div { display: flex; flex-direction: column; }
.app-brand strong { font-size: 32px; line-height: 1; }
.app-brand span { margin-top: 8px; color: #65728b; font-size: 14px; }
.app-brand small { margin-top: 5px; color: #c35b14; font-weight: 700; }
.device-card, .folder-card, .task-card { margin-top: 18px; border: 1px solid #e2e8f0; border-radius: 15px; background: #f9fbff; }
.device-card { display: grid; grid-template-columns: 1fr auto; align-items: center; padding: 15px 17px; }
.device-card span, .folder-card > span { color: #778298; font-size: 12px; }
.device-card strong { grid-row: 2; font-size: 18px; letter-spacing: .03em; }
.device-card small { grid-column: 2; grid-row: 1 / 3; color: #48556d; }
.folder-card { padding: 15px 17px; }
.folder-row { display: flex; align-items: center; justify-content: space-between; margin-top: 8px; }
.folder-row b { color: #3b465b; font-size: 13px; }
.folder-row button { padding: 8px 12px; color: #fff; background: var(--blue); border: 0; border-radius: 8px; font-size: 11px; }
.task-card { display: flex; align-items: center; justify-content: space-between; padding: 15px 17px; border-color: #d9ebdf; background: #f3fbf6; }
.task-card div { display: flex; flex-direction: column; gap: 5px; }
.task-card small { color: #708077; }
.task-card > strong { color: #17804a; font-size: 13px; }
.float-chip { position: absolute; z-index: 3; padding: 10px 14px; color: #2b58d4; background: rgba(255,255,255,.92); border: 1px solid #dae5ff; border-radius: 12px; box-shadow: 0 12px 30px rgba(49,83,163,.16); font-size: 13px; font-weight: 800; }
.chip-one { top: 5px; right: 54px; transform: rotate(4deg); }
.chip-two { left: 0; bottom: 100px; transform: rotate(-5deg); }
.success-bubble { position: absolute; right: -24px; bottom: 2px; display: flex; align-items: center; gap: 11px; min-width: 245px; padding: 14px 17px; background: #142340; color: #fff; border-radius: 16px; box-shadow: 0 17px 38px rgba(15,29,55,.24); }
.success-bubble > span { display: grid; place-items: center; width: 32px; height: 32px; background: #2bb673; border-radius: 50%; font-weight: 900; }
.success-bubble div { display: flex; flex-direction: column; gap: 3px; }
.success-bubble small { color: #b7c1d2; font-size: 11px; }

.proof-strip { border-top: 1px solid #edf0f6; border-bottom: 1px solid #edf0f6; background: #fff; }
.proof-inner { min-height: 104px; display: flex; align-items: center; justify-content: space-between; }
.proof-inner > span { color: #778196; font-size: 14px; font-weight: 600; }
.platform-logos { display: flex; align-items: center; gap: 36px; }
.platform-logos b { font-size: 21px; letter-spacing: .02em; }
.platform-logos .jd, .platform-logos .tmall { color: #e33232; }
.platform-logos .taobao, .platform-logos .ali { color: #ff6a24; }

.section { padding: 106px 0; }
.section-heading { max-width: 740px; margin: 0 auto 54px; text-align: center; }
.section-kicker { display: inline-block; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.section-kicker.light { color: #9eb8ff; }
.section-heading h2, .workflow-copy h2, .download-intro h2, .faq-heading h2 { margin: 15px 0 16px; color: #101a33; font-size: clamp(32px, 4vw, 46px); line-height: 1.2; letter-spacing: -.03em; }
.section-heading p, .workflow-copy > p, .download-intro > p, .faq-heading > p { margin: 0; color: var(--muted); line-height: 1.8; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { position: relative; min-height: 280px; overflow: hidden; padding: 30px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.feature-card:hover { transform: translateY(-7px); border-color: #cedaff; box-shadow: 0 22px 50px rgba(36,68,140,.11); }
.feature-primary { color: #fff; background: linear-gradient(145deg, #3f70f8, #224fd3); border: 0; }
.feature-icon { display: grid; place-items: center; width: 48px; height: 48px; color: var(--blue); background: var(--blue-soft); border-radius: 14px; font-size: 25px; font-weight: 700; }
.feature-primary .feature-icon { color: #fff; background: rgba(255,255,255,.16); }
.feature-number { position: absolute; right: 25px; top: 22px; color: #e8edf6; font-size: 42px; font-weight: 900; }
.feature-primary .feature-number { color: rgba(255,255,255,.12); }
.feature-card h3 { margin: 28px 0 12px; font-size: 21px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.feature-primary p { color: #dfe7ff; }
.mini-counts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.mini-counts span { padding: 7px 9px; background: rgba(255,255,255,.13); border-radius: 8px; font-size: 11px; }

.workflow-section { color: #fff; background: var(--navy); }
.workflow-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; align-items: center; }
.workflow-copy h2, .download-intro h2 { color: #fff; }
.workflow-copy > p, .download-intro > p { color: #aebbd4; }
.workflow-list { display: grid; gap: 15px; margin-top: 35px; }
.workflow-list > div { display: flex; align-items: center; gap: 16px; padding: 15px; border: 1px solid rgba(255,255,255,.1); border-radius: 16px; background: rgba(255,255,255,.035); }
.workflow-list b { display: grid; place-items: center; width: 39px; height: 39px; color: #b7c9ff; background: rgba(71,120,255,.18); border-radius: 12px; }
.workflow-list span { display: flex; flex-direction: column; gap: 4px; }
.workflow-list small { color: #93a2bd; }
.folder-preview { padding: 25px; color: var(--ink); background: #fff; border: 1px solid #dbe3f3; border-radius: 25px; box-shadow: 0 30px 80px rgba(0,0,0,.25); transform: rotate(1deg); }
.folder-top { display: flex; align-items: center; gap: 15px; padding: 17px; background: #f4f7fd; border-radius: 15px; }
.folder-symbol { display: grid; place-items: center; width: 44px; height: 44px; color: #fff; background: var(--blue); border-radius: 12px; }
.folder-top div { min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.folder-top small { color: #7a869d; }
.folder-top strong { overflow: hidden; font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.folder-tree { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 18px; }
.folder-tree > div { display: grid; grid-template-columns: 30px 1fr; align-items: center; padding: 15px; border: 1px solid #e5eaf2; border-radius: 14px; }
.folder-tree span { grid-row: 1 / 3; font-size: 22px; }
.folder-tree b { font-size: 14px; }
.folder-tree small { margin-top: 4px; color: #8a94a8; font-size: 10px; }

.install-section { background: var(--surface); }
.install-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.install-card { padding: 30px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 14px 36px rgba(40,61,110,.06); }
.step-top { display: flex; align-items: center; justify-content: space-between; color: var(--blue); font-size: 13px; font-weight: 800; }
.step-top b { color: #e7ebf3; font-size: 42px; }
.install-icon { display: grid; place-items: center; width: 55px; height: 55px; margin: 8px 0 22px; border-radius: 16px; font-size: 28px; font-weight: 800; }
.install-icon.windows { color: #fff; background: var(--blue); }
.install-icon.browser { color: #ef5b31; background: #fff1ed; }
.install-icon.rocket { color: #09865f; background: #e9f9f3; }
.install-card h3 { margin: 0 0 20px; font-size: 21px; }
.install-card ol { margin: 0; padding-left: 20px; color: #4f5b72; line-height: 2; font-size: 14px; }
.install-card > p { margin: 18px 0 0; padding-top: 17px; color: #7a859a; border-top: 1px solid #edf0f5; font-size: 12px; line-height: 1.7; }
.install-card code { padding: 2px 5px; background: #f0f3f8; border-radius: 5px; }

.download-section { padding: 92px 0; background: #fff; }
.download-panel { position: relative; overflow: hidden; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; padding: 58px; color: #fff; background: linear-gradient(135deg, #142344, #223e82); border-radius: 30px; box-shadow: 0 30px 80px rgba(23,43,91,.22); }
.download-panel::after { content: ""; position: absolute; width: 350px; height: 350px; right: -150px; top: -180px; background: rgba(71,120,255,.35); border-radius: 50%; filter: blur(5px); }
.download-intro, .download-options { position: relative; z-index: 1; }
.system-note { display: inline-flex; align-items: center; gap: 8px; margin-top: 24px; padding: 10px 13px; color: #c6d3ef; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.1); border-radius: 10px; font-size: 12px; }
.system-note span { color: #54d99b; }
.download-main { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; padding: 19px; color: var(--ink); background: #fff; border-radius: 17px; box-shadow: 0 15px 35px rgba(0,0,0,.15); transition: transform .2s ease; }
.download-main:hover { transform: translateY(-3px); }
.download-os { display: grid; place-items: center; width: 49px; height: 49px; color: #fff; background: var(--blue); border-radius: 13px; font-size: 26px; }
.download-main > span:nth-child(2) { display: flex; flex-direction: column; gap: 3px; }
.download-main small, .download-main em { color: #8390a4; font-size: 11px; font-style: normal; }
.download-main strong { font-size: 17px; }
.download-main > b { color: var(--blue); font-size: 25px; }
.browser-downloads { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.browser-downloads a { display: grid; grid-template-columns: auto 1fr; gap: 2px 9px; padding: 14px; color: #fff; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.12); border-radius: 14px; transition: background .2s ease; }
.browser-downloads a:hover { background: rgba(255,255,255,.14); }
.browser-downloads span { grid-row: 1 / 3; align-self: center; width: 22px; height: 22px; border-radius: 50%; }
.chrome-dot { background: conic-gradient(#e94b35 0 33%, #f6c244 0 66%, #2cac66 0); border: 5px solid #fff; }
.edge-dot { background: linear-gradient(135deg, #22c9bd, #178be5 65%, #295bd7); }
.browser-downloads strong { font-size: 13px; }
.browser-downloads small { color: #aebbd3; font-size: 10px; }
.download-help { margin: 13px 0 0; color: #8999b8; font-size: 10px; text-align: center; }

.faq-section { background: var(--surface); }
.faq-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: 90px; align-items: start; }
.faq-heading { position: sticky; top: 120px; }
.faq-list { display: grid; gap: 12px; }
.faq-list details { padding: 0 23px; background: #fff; border: 1px solid var(--line); border-radius: 16px; }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; min-height: 72px; cursor: pointer; list-style: none; font-weight: 700; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--blue); font-size: 24px; font-weight: 400; transition: transform .2s ease; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { margin: -3px 30px 22px 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.notice-section { padding: 65px 0; color: #b6c1d5; background: #111a2e; }
.notice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.notice-grid h2, .notice-grid h3 { margin: 0 0 14px; color: #fff; font-size: 17px; }
.notice-grid p { margin: 0; font-size: 12px; line-height: 1.85; }
.site-footer { color: #8e9ab1; background: #0c1425; border-top: 1px solid rgba(255,255,255,.07); }
.footer-inner { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 25px; font-size: 12px; }
.footer-brand img { width: 38px; height: 38px; border-radius: 11px; }
.footer-brand strong { color: #fff; font-size: 18px; }
.footer-brand small { color: #8290aa; }
.back-top { position: fixed; right: 24px; bottom: 24px; z-index: 30; display: grid; place-items: center; width: 44px; height: 44px; color: #fff; background: var(--blue); border-radius: 14px; box-shadow: 0 10px 25px rgba(53,103,246,.3); opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .2s ease, transform .2s ease; }
.back-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; transition: none !important; }
}

@media (max-width: 980px) {
  .site-nav { position: absolute; left: 20px; right: 20px; top: 70px; display: none; flex-direction: column; align-items: stretch; gap: 5px; padding: 14px; background: #fff; border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px; }
  .site-nav .nav-download { text-align: center; }
  .menu-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; gap: 35px; padding-top: 55px; }
  .hero-copy { text-align: center; }
  .hero-lead { margin-inline: auto; }
  .hero-actions, .trust-row { justify-content: center; }
  .product-stage { max-width: 680px; width: 100%; margin: 0 auto; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .workflow-grid, .download-panel, .faq-grid { grid-template-columns: 1fr; gap: 48px; }
  .faq-heading { position: static; }
  .install-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .container { width: min(100% - 28px, 1180px); }
  .nav-wrap { height: 68px; }
  .brand img { width: 40px; height: 40px; }
  .brand strong { font-size: 19px; }
  .hero { min-height: auto; }
  .hero-grid { padding: 45px 0 70px; }
  .hero h1 { font-size: 39px; }
  .hero-lead { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .button { width: 100%; }
  .product-stage { padding-left: 0; }
  .window-body { padding: 16px; }
  .app-brand img { width: 60px; height: 60px; }
  .app-brand strong { font-size: 26px; }
  .device-card { grid-template-columns: 1fr; }
  .device-card small { grid-column: 1; grid-row: 3; margin-top: 7px; }
  .success-bubble { position: relative; right: auto; bottom: auto; margin: -4px 13px 0; }
  .chip-one { right: 6px; }
  .chip-two { display: none; }
  .proof-inner { flex-direction: column; justify-content: center; gap: 18px; padding: 24px 0; }
  .platform-logos { width: 100%; justify-content: space-between; gap: 10px; }
  .platform-logos b { font-size: 17px; }
  .section { padding: 78px 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; }
  .folder-tree { grid-template-columns: 1fr; }
  .download-panel { padding: 34px 22px; border-radius: 22px; }
  .browser-downloads { grid-template-columns: 1fr; }
  .notice-grid { grid-template-columns: 1fr; gap: 35px; }
  .footer-inner { flex-direction: column; padding: 28px 0; text-align: center; }
  .back-top { right: 14px; bottom: 14px; }
}