:root {
  --ink: #17233b;
  --muted: #66728a;
  --paper: #f7f9fc;
  --panel: #ffffff;
  --blue: #2055d6;
  --blue-dark: #153b9d;
  --orange: #ff6a3d;
  --line: #e4e9f2;
  --shadow: 0 18px 45px rgba(27, 55, 113, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; color: var(--ink); background: var(--paper); line-height: 1.75; }
a { color: inherit; text-decoration: none; }
.topbar { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.nav-wrap { max-width: 1180px; margin: 0 auto; min-height: 72px; padding: 0 22px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: 0; white-space: nowrap; }
.brand img { width: 40px; height: 40px; border-radius: 11px; box-shadow: 0 5px 15px rgba(32,85,214,.22); }
.brand-name { font-size: 18px; }
.nav-links { display: flex; align-items: center; gap: 20px; margin-left: auto; color: var(--muted); font-size: 14px; }
.nav-links a { padding: 7px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--blue); border-color: var(--orange); }
.nav-cta { margin-left: 8px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 7px; padding: 12px 22px; font-weight: 700; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: var(--orange); box-shadow: 0 8px 20px rgba(255,106,61,.28); }
.btn-primary:hover { background: #ec5730; }
.btn-ghost { color: var(--blue); background: #eaf0ff; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 22px; }
.hero { padding: 42px 0; background: linear-gradient(120deg, #f8fbff 0%, #eef3ff 52%, #fff8f4 100%); border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: 54px; align-items: center; }
.hero-grid > * { min-width: 0; }
.eyebrow { color: var(--orange); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.16; margin: 12px 0 18px; letter-spacing: 0; }
.hero h1 { font-size: 46px; line-height: 1.16; margin: 10px 0 16px; }
.hero h1 span { display: block; }
.hero-title-main { color: #17233b; }
.hero-title-sub { color: var(--orange); font-size: 36px; margin-top: 4px; }
.hero p { color: var(--muted); max-width: 590px; font-size: 17px; margin: 0 0 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-note { display: flex; gap: 18px; margin-top: 23px; color: var(--muted); font-size: 13px; flex-wrap: wrap; }
.hero-note span { display: inline-flex; align-items: center; gap: 6px; }
.hero-note span + span::before { content: "|"; margin-right: 12px; color: #9aa6bc; }
.device-stage { position: relative; min-height: 390px; display: grid; place-items: center; }
.device { width: min(300px, 78vw); border: 10px solid #1b2947; border-radius: 30px; background: #edf2ff; padding: 9px; box-shadow: 24px 26px 0 rgba(32,85,214,.14), var(--shadow); transform: rotate(3deg); }
.device img { display: block; width: 100%; height: auto; border-radius: 17px; }
.float-chip { position: absolute; background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 11px 14px; box-shadow: 0 13px 26px rgba(25,54,112,.12); font-size: 12px; font-weight: 700; }
.chip-one { top: 14%; left: 4%; color: var(--blue); }
.chip-two { right: 0; bottom: 11%; color: var(--orange); }
.section { padding: 76px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
h2 { font-size: 30px; line-height: 1.25; margin: 0; letter-spacing: 0; }
.section-head p { margin: 0; max-width: 520px; color: var(--muted); font-size: 14px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 24px; box-shadow: 0 7px 20px rgba(32,52,100,.04); }
.feature-icon { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 10px; background: #eaf0ff; color: var(--blue); font-size: 21px; margin-bottom: 16px; }
.feature:nth-child(2) .feature-icon { background: #fff0eb; color: var(--orange); }
.feature:nth-child(3) .feature-icon { background: #e7f7f2; color: #168466; }
.feature h3 { margin: 0 0 8px; font-size: 18px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }
.split { display: grid; grid-template-columns: .82fr 1.18fr; gap: 38px; align-items: center; }
.screen-row { display: flex; gap: 18px; align-items: end; flex-wrap: wrap; }
.screen-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 10px; box-shadow: var(--shadow); }
.screen-card img { display: block; max-width: 190px; width: 100%; height: auto; border-radius: 9px; }
.screen-card.tall { transform: translateY(-18px); }
.list { margin: 20px 0 0; padding: 0; list-style: none; }
.list li { display: flex; gap: 11px; align-items: flex-start; margin: 12px 0; color: var(--muted); font-size: 15px; }
.list li::before { content: "✓"; flex: 0 0 22px; width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--blue); font-size: 12px; font-weight: 800; margin-top: 3px; }
.stats-band { background: var(--ink); color: #fff; padding: 38px 0; }
.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; text-align: center; }
.stat strong { display: block; font-size: 31px; color: #fff; }
.stat span { color: #b6c1d8; font-size: 13px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { display: flex; flex-direction: column; margin: 0; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 22px; }
.quote-stars { color: #db8c19; font-size: 18px; line-height: 1; margin-bottom: 13px; }
.quote p { flex: 1; margin: 0 0 15px; font-size: 15px; }
.quote-meta { display: flex; justify-content: space-between; align-items: end; flex-wrap: wrap; gap: 8px 12px; }
.quote-meta time { color: var(--muted); font-size: 12px; }
.quote cite { color: var(--muted); font-size: 13px; font-style: normal; }
.link-panel { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.link-card { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.link-card h3 { margin: 0 0 6px; font-size: 17px; }
.link-card p { margin: 0 0 12px; color: var(--muted); font-size: 13px; }
.text-link { color: var(--blue); font-weight: 700; font-size: 13px; }
.page-hero { padding: 55px 0 45px; background: #edf3ff; border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(30px, 5vw, 48px); margin-bottom: 12px; }
.page-hero p { color: var(--muted); max-width: 760px; margin: 0; }
.article { max-width: 900px; margin: 0 auto; }
.article section { padding: 42px 0; border-bottom: 1px solid var(--line); }
.article section:last-child { border-bottom: 0; }
.article h2 { font-size: 25px; margin-bottom: 18px; }
.article h3 { font-size: 18px; margin: 24px 0 8px; }
.article p { color: #4e5b72; margin: 12px 0; }
.guide-points { margin: 0; padding-left: 26px; color: #4e5b72; }
.guide-points li { padding-left: 5px; margin: 10px 0; }
.guide-points li::marker { color: var(--blue); font-weight: 800; }
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.step-num { color: var(--orange); font-size: 13px; font-weight: 800; }
.step h3 { margin: 5px 0 8px; }
.step p { font-size: 14px; margin: 0; }
.faq-list { display: grid; gap: 10px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.faq-q { width: 100%; text-align: left; border: 0; background: #fff; padding: 17px 19px; color: var(--ink); font: inherit; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.faq-q span:last-child { color: var(--blue); font-size: 20px; }
.faq-a { display: none; padding: 0 19px 17px; color: var(--muted); font-size: 14px; }
.faq-item.open .faq-a { display: block; }
.faq-item.open .faq-q span:last-child { transform: rotate(45deg); }
.download-strip { padding: 56px 0; background: #fff0eb; }
.download-box { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.download-box h2 { font-size: 28px; }
.download-box p { margin: 8px 0 0; color: var(--muted); }
footer { background: #111b30; color: #d7deee; padding: 34px 0 22px; }
.footer-grid { display: grid; grid-template-columns: 1.1fr .65fr 1.35fr; gap: 30px; }
footer .brand-name { color: #fff; }
footer h3 { margin: 0 0 10px; color: #fff; font-size: 15px; }
footer p, footer li { margin: 6px 0; color: #aeb9ce; font-size: 13px; }
footer ul { list-style: none; padding: 0; margin: 0; }
.footer-app-info dl { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px 16px; margin: 0; }
.footer-app-info dl > div { min-width: 0; }
.footer-app-info dt { color: #8d9ab1; font-size: 12px; }
.footer-app-info dd { display: flex; align-items: center; gap: 5px; margin: 2px 0 0; color: #fff; font-size: 13px; font-weight: 700; white-space: nowrap; }
.android-icon { width: 16px; height: 16px; flex: none; color: #9fda70; }
.footer-bottom { border-top: 1px solid #2b3852; margin-top: 24px; padding-top: 16px; color: #8d9ab1; font-size: 12px; }
@media (max-width: 860px) { .hero-grid, .split { grid-template-columns: 1fr; } .device-stage { min-height: 330px; } .feature-grid, .quote-grid, .link-panel { grid-template-columns: 1fr 1fr; } .step-grid { grid-template-columns: 1fr; } .footer-grid { grid-template-columns: 1fr 1fr; } .download-box { align-items: flex-start; flex-direction: column; } }
@media (max-width: 860px) { .footer-app-info { grid-column: 1 / -1; } }
@media (max-width: 560px) { .nav-wrap { min-height: 64px; padding: 0 16px; gap: 10px; } .nav-links { gap: 10px; font-size: 12px; } .nav-links a:first-child, .nav-links a:nth-child(3) { display: none; } .nav-cta { display: none; } .brand-name { font-size: 16px; } .hero { padding: 32px 0; } .hero h1 { font-size: 34px; } .hero-title-sub { font-size: 28px; } .hero p { font-size: 15px; overflow-wrap: anywhere; } .feature-grid, .quote-grid, .link-panel, .stats, .footer-grid { grid-template-columns: 1fr; } .section { padding: 54px 0; } .section-head { display: block; } .section-head p { margin-top: 10px; } .screen-card img { max-width: 160px; } h1 { font-size: 32px; overflow-wrap: anywhere; } }