:root {
    --bg: #F5FAFE;
    --deep-bg: #E7F2FA;
    --card: #FFFFFF;
    --sub-bg: #D7EAF6;
    --title: #16324A;
    --text: #2A4156;
    --muted: #4E6A80;
    --soft: #6E8899;
    --brand: #4AA3E0;
    --bright: #6BB8EC;
    --deep: #1B4A6E;
    --mist: #EAF5FC;
    --border: rgba(74,163,224,.16);
    --border-strong: rgba(74,163,224,.42);
    --shadow: 0 12px 28px rgba(27,74,110,.08);
    --radius: 12px;
    --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 15px; line-height: 1.7; overflow-x: hidden; }
body.is-locked { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid rgba(74,163,224,.35); outline-offset: 2px; }
.site-chrome { position: fixed; inset: 0 0 auto 0; z-index: 70; }
.topline { height: 22px; background: var(--deep); color: #fff; font-size: 12px; }
.topline-inner, .masthead-inner, .section-tabs-inner { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.topline-inner { height: 22px; display: flex; align-items: center; justify-content: space-between; }
.text-control { min-height: 22px; border: 0; color: #fff; background: transparent; padding: 0 4px; }
.masthead { height: 60px; background: #fff; border-bottom: 1px solid var(--border); }
.masthead-inner { height: 60px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; }
.brand-link { justify-self: start; min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; }
.brand-logo { height: 28px; width: auto; max-width: 150px; object-fit: contain; object-position: center; }
.brand-fallback, .footer-logo-fallback { font-weight: 800; font-size: 22px; color: var(--deep); letter-spacing: .04em; }
.drawer-trigger { justify-self: center; min-width: 76px; height: 42px; border: 1px solid var(--border-strong); border-radius: 999px; background: var(--mist); color: var(--deep); font-weight: 700; }
.app-link { justify-self: end; display: inline-flex; align-items: center; justify-content: center; min-width: 86px; height: 42px; border-radius: 999px; background: linear-gradient(135deg,#6BB8EC 0%,#4AA3E0 55%,#1B4A6E 100%); color: #fff; font-size: 14px; font-weight: 700; }
.section-tabs { height: 40px; background: var(--mist); border-bottom: 1px solid var(--border); }
.section-tabs-inner { height: 40px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.tab-link { min-width: 82px; height: 32px; display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; color: var(--deep); font-size: 13px; }
.tab-link.is-current { background: var(--brand); color: #fff; }
.site-main { min-height: 70vh; padding-top: 122px; }
.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.page-hero { padding: 36px 0 20px; }
.eyebrow { display: inline-flex; align-items: center; min-height: 28px; padding: 3px 10px; border-radius: 999px; background: var(--mist); color: var(--deep); font-size: 13px; font-weight: 700; }
h1, h2, h3 { color: var(--title); margin: 0; line-height: 1.3; }
h1 { font-size: 24px; margin-top: 10px; }
h2 { font-size: 20px; }
h3 { font-size: 16px; }
p { margin: 0; }
.lead { max-width: 800px; margin-top: 12px; color: var(--muted); }
.section { padding: 22px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.section-head p { color: var(--soft); font-size: 13px; }
.grid-2, .grid-3, .grid-4 { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.card-body { padding: 18px; }
.card-body h2, .card-body h3 { margin-bottom: 8px; }
.card-body p + p { margin-top: 10px; }
.media-slot { width: 100%; background: var(--mist); display: flex; align-items: center; justify-content: center; overflow: hidden; border-bottom: 1px solid var(--border); }
.media-slot img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.media-cover { height: 260px; }
.media-card { height: 180px; }
.media-feature { height: 200px; }
.media-app { height: 340px; }
.media-logo { height: 96px; }
.cover-card { background: #fff; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; box-shadow: var(--shadow); }
.cover-copy { padding: 22px; }
.cover-copy .brand-line { color: var(--brand); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.cover-copy h1 { margin-top: 6px; }
.cover-copy p { margin-top: 10px; max-width: 820px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.btn { min-height: 42px; padding: 0 18px; border-radius: 999px; display: inline-flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; white-space: nowrap; }
.btn-primary { background: linear-gradient(135deg,#6BB8EC 0%,#4AA3E0 55%,#1B4A6E 100%); color: #fff; }
.btn-secondary { background: #fff; color: var(--deep); border: 1px solid var(--border-strong); }
.btn:hover { transform: translateY(-1px); }
.number-list { display: grid; gap: 10px; }
.number-item { display: grid; grid-template-columns: 44px 1fr; gap: 12px; align-items: start; padding: 14px; background: #fff; border: 1px solid var(--border); border-radius: 12px; }
.number { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 800; }
.number-item p { color: var(--muted); }
.shelf { display: grid; gap: 10px; }
.shelf-row { background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--bright); border-radius: 10px; padding: 14px 16px; }
.shelf-row strong { color: var(--title); display: block; margin-bottom: 4px; }
.timeline { position: relative; margin-left: 10px; padding-left: 26px; display: grid; gap: 16px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--sub-bg); }
.timeline-item { position: relative; background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; }
.timeline-item::before { content: ""; position: absolute; left: -25px; top: 20px; width: 12px; height: 12px; border: 3px solid var(--bg); border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 1px var(--border-strong); }
.status { display: inline-flex; min-height: 26px; align-items: center; padding: 2px 9px; border-radius: 999px; background: var(--mist); color: var(--deep); font-size: 12px; font-weight: 700; margin-bottom: 6px; }
.prose { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 22px; box-shadow: var(--shadow); }
.prose h2 { margin: 22px 0 8px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 16px 0 6px; }
.prose p + p { margin-top: 10px; }
.prose ul { margin: 8px 0 0; padding-left: 20px; }
.prose li + li { margin-top: 6px; }
.note-strip { padding: 14px 16px; border: 1px solid var(--border-strong); background: var(--mist); border-radius: 10px; color: var(--deep); }
.index-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
.index-link { min-height: 88px; padding: 14px; background: #fff; border: 1px solid var(--border); border-radius: 12px; display: flex; flex-direction: column; justify-content: center; }
.index-link strong { color: var(--title); }
.index-link span { color: var(--muted); margin-top: 4px; font-size: 13px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.faq-item h2 { font-size: 16px; margin-bottom: 8px; }
.contact-channels { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.site-footer { background: var(--deep); color: #E7F2FA; margin-top: 34px; padding: 30px 0 84px; border-top: 1px solid rgba(234,245,252,.25); }
.footer-inner { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.footer-brand-mark { width: 60px; min-height: 44px; display: flex; align-items: center; }
.footer-brand .brand-logo { filter: brightness(0) invert(1); }
.footer-brand strong { display: block; color: #fff; font-size: 16px; }
.footer-brand span { display: block; font-size: 13px; color: #E7F2FA; }
.footer-logo-fallback { color: #fff; }
.footer-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; padding: 18px 0; border-top: 1px solid rgba(234,245,252,.18); border-bottom: 1px solid rgba(234,245,252,.18); }
.footer-grid section { display: flex; flex-direction: column; gap: 6px; }
.footer-grid h2 { color: #fff; font-size: 13px; margin-bottom: 4px; }
.footer-grid a { color: #E7F2FA; font-size: 13px; }
.footer-grid a:hover { text-decoration: underline; }
.footer-note, .footer-copy { font-size: 13px; }
.footer-note { margin-top: 18px; max-width: 860px; }
.footer-copy { margin-top: 8px; color: #D7EAF6; }
.page-overlay { position: fixed; inset: 0; z-index: 80; background: rgba(22,50,74,.34); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.page-overlay.is-active { opacity: 1; visibility: visible; pointer-events: auto; }
.drawer-panel { position: fixed; z-index: 90; top: 0; right: 0; width: min(400px, 86vw); height: 100dvh; background: #fff; border-left: 1px solid var(--border); box-shadow: -18px 0 40px rgba(27,74,110,.14); transform: translateX(102%); visibility: hidden; pointer-events: none; transition: transform .22s ease, visibility .22s ease; }
.drawer-panel.is-open { transform: translateX(0); visibility: visible; pointer-events: auto; }
.drawer-head { height: 64px; padding: 0 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.drawer-brand { display: flex; align-items: center; gap: 10px; }
.drawer-brand strong { color: var(--title); }
.icon-control { min-width: 58px; min-height: 42px; border: 1px solid var(--border-strong); background: #fff; color: var(--deep); border-radius: 999px; }
.drawer-scroll { height: calc(100dvh - 64px); overflow-y: auto; padding: 12px 16px 28px; }
.drawer-group { padding: 12px 0; }
.drawer-group + .drawer-group { border-top: 1px solid var(--border); }
.drawer-group h2 { font-size: 13px; color: var(--soft); margin-bottom: 6px; }
.drawer-group a { display: grid; grid-template-columns: 72px 1fr; gap: 10px; padding: 9px 8px; border-radius: 9px; }
.drawer-group a:hover { background: var(--mist); }
.drawer-group strong { color: var(--title); font-size: 14px; }
.drawer-group span { color: var(--muted); font-size: 12px; line-height: 1.5; }
.search-layer { position: fixed; z-index: 95; top: 82px; left: 0; right: 0; visibility: hidden; pointer-events: none; transform: translateY(-10px); opacity: 0; transition: .18s ease; }
.search-layer.is-open { visibility: visible; pointer-events: auto; transform: translateY(0); opacity: 1; }
.search-card { width: min(760px, calc(100% - 32px)); margin: 14px auto 0; background: #fff; border: 1px solid var(--border-strong); border-radius: 14px; box-shadow: var(--shadow); padding: 18px; }
.search-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.search-head strong { color: var(--title); font-size: 16px; }
.search-card > p { color: var(--muted); margin: 6px 0 12px; }
.search-form label { display: block; color: var(--deep); font-size: 13px; margin-bottom: 6px; }
.search-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; }
.search-row input { width: 100%; min-width: 0; height: 44px; border: 1px solid var(--border-strong); border-radius: 10px; padding: 0 12px; color: var(--text); background: #fff; }
.search-row button { min-width: 78px; height: 44px; border: 0; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 700; }
.search-presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.search-presets a { min-height: 36px; padding: 0 12px; display: inline-flex; align-items: center; border-radius: 999px; background: var(--mist); color: var(--deep); font-size: 13px; }
.mobile-bottom { display: none; }
.divider { height: 1px; background: var(--border); margin: 8px 0; }
.small { font-size: 13px; color: var(--soft); }
.spaced-paragraph { margin-top: 14px; }
.badge-row-tight { margin-top: 0; }
.app-icon { width: 48px; height: 48px; object-fit: contain; object-position: center; }
.callout { padding: 16px; border-radius: 12px; background: var(--deep); color: #fff; }
.callout h2, .callout h3 { color: #fff; }
.callout p { color: #fff; opacity: .92; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.badge { display: inline-flex; align-items: center; min-height: 30px; padding: 3px 10px; border-radius: 999px; background: var(--mist); color: var(--deep); font-size: 13px; }

@media (max-width: 820px) {
    .section-tabs { display: none; }
    .site-main { padding-top: 82px; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-3 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .site-footer { padding-bottom: 92px; }
    .mobile-bottom { position: fixed; z-index: 60; left: 0; right: 0; bottom: 0; min-height: calc(48px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); display: grid; grid-template-columns: repeat(5,1fr); background: #fff; border-top: 1px solid var(--border); box-shadow: 0 -8px 22px rgba(27,74,110,.08); }
    .mobile-bottom a { min-height: 48px; display: flex; align-items: center; justify-content: center; color: var(--deep); font-size: 13px; }
    .mobile-bottom a.is-current { background: var(--brand); color: #fff; }
    .search-layer { inset: 0; top: 0; background: var(--deep); display: flex; align-items: flex-start; overflow-y: auto; }
    .search-card { width: 100%; min-height: 100dvh; margin: 0; border: 0; border-radius: 0; background: var(--deep); color: #fff; padding: 24px 16px 80px; box-shadow: none; }
    .search-head strong, .search-card > p, .search-form label { color: #fff; }
    .search-head .icon-control { border-color: rgba(255,255,255,.45); background: transparent; color: #fff; }
    .search-presets a { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.18); }
}
@media (max-width: 640px) {
    .topline-inner, .masthead-inner, .section-tabs-inner, .container, .footer-inner { width: calc(100% - 32px); }
    .masthead-inner { grid-template-columns: minmax(60px,1fr) auto minmax(76px,1fr); gap: 8px; }
    .brand-logo { max-width: 104px; }
    .drawer-trigger { min-width: 68px; }
    .app-link { min-width: 78px; font-size: 13px; }
    .page-hero { padding-top: 26px; }
    .grid-2, .grid-4, .index-grid, .contact-channels { grid-template-columns: 1fr; }
    .cover-copy { padding: 18px; }
    .media-cover { height: 260px; }
    .media-card { height: 180px; }
    .media-feature { height: 200px; }
    .media-app { height: 320px; }
    .number-item { grid-template-columns: 40px 1fr; }
    .number { width: 40px; height: 40px; }
    .prose { padding: 18px; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
    .drawer-group a { grid-template-columns: 66px 1fr; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}