:root {
    --bg: #F3F6F9;
    --panel: #FFFFFF;
    --panel-soft: #E8EEF5;
    --title: #0B1220;
    --text: #1E293B;
    --text-2: #475569;
    --muted: #64748B;
    --blue: #2563EB;
    --blue-light: #60A5FA;
    --blue-deep: #1D4ED8;
    --lime: #65A30D;
    --slate: #334155;
    --border: rgba(37,99,235,0.16);
    --shadow: 0 14px 36px rgba(11,18,32,0.08);
    --header-h: 136px;
    --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
    margin: 0;
    min-width: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    text-rendering: optimizeLegibility;
}
body.is-locked { overflow: hidden; }
a { color: inherit; text-decoration: none; }
a, button, input { -webkit-tap-highlight-color: transparent; }
button, input { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; height: auto; }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 80; }
.status-bar { height: 32px; background: var(--slate); color: #fff; }
.status-inner { height: 32px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.status-brand { font-size: 13px; font-weight: 700; letter-spacing: .04em; }
.icon-text-btn, .close-btn {
    min-height: 32px;
    border: 0;
    background: transparent;
    color: inherit;
    padding: 0 8px;
    border-radius: 999px;
}
.icon-text-btn:hover, .icon-text-btn:focus-visible, .close-btn:hover, .close-btn:focus-visible { outline: 2px solid rgba(255,255,255,.55); outline-offset: 2px; }
.command-bar { height: 60px; background: #fff; border-bottom: 1px solid var(--border); }
.command-inner { height: 60px; display: grid; grid-template-columns: 100px 1fr 100px; align-items: center; gap: 12px; }
.square-btn {
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
}
.square-btn span { width: 18px; height: 2px; background: var(--slate); border-radius: 2px; }
.square-btn:hover, .square-btn:focus-visible { border-color: var(--blue); outline: 3px solid rgba(37,99,235,.12); }
.command-logo { min-height: 44px; display: flex; align-items: center; justify-content: center; color: var(--title); font-size: 21px; letter-spacing: .02em; }
.brand-mark { max-height: 32px; width: auto; object-fit: contain; }
.app-link {
    justify-self: end;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 18px;
    color: #fff;
    background: linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%);
    border-radius: 999px;
    font-weight: 700;
}
.app-link:hover, .app-link:focus-visible, .btn-primary:hover, .btn-primary:focus-visible { filter: brightness(.97); outline: 3px solid rgba(37,99,235,.2); outline-offset: 2px; }
.desktop-tabs { height: 44px; background: #fff; border-bottom: 1px solid var(--border); }
.tabs-inner { height: 44px; display: grid; grid-template-columns: repeat(6, 1fr); align-items: stretch; }
.tabs-inner a { display: flex; align-items: center; justify-content: center; min-width: 0; font-size: 14px; color: var(--text-2); border-bottom: 2px solid transparent; }
.tabs-inner a:hover, .tabs-inner a:focus-visible { color: var(--blue); outline: none; background: rgba(37,99,235,.04); }
.tabs-inner a.is-current { color: var(--blue); border-bottom-color: var(--blue); font-weight: 700; }
.site-main { padding-top: calc(var(--header-h) + 28px); min-height: 70vh; }
.section { padding: 28px 0; }
.section + .section { border-top: 1px solid rgba(37,99,235,.08); }
.eyebrow { margin: 0 0 8px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
h1, h2, h3 { color: var(--title); line-height: 1.3; margin-top: 0; }
h1 { font-size: clamp(28px, 4vw, 32px); margin-bottom: 16px; letter-spacing: -.02em; }
h2 { font-size: clamp(22px, 3vw, 26px); margin-bottom: 12px; }
h3 { font-size: 18px; margin-bottom: 8px; }
p { margin: 0 0 14px; }
.lead { max-width: 860px; color: var(--text-2); font-size: 17px; }
.card, .hero-card, .long-strip, .service-card, .statement-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.hero-card { padding: clamp(20px, 4vw, 34px); }
.hero-copy { max-width: 780px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.btn-primary, .btn-secondary {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 18px;
    border-radius: 999px;
    font-weight: 700;
}
.btn-primary { color: #fff; background: linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%); }
.btn-secondary { color: var(--blue); background: #fff; border: 1px solid rgba(37,99,235,.28); }
.btn-secondary:hover, .btn-secondary:focus-visible { background: rgba(37,99,235,.05); outline: 3px solid rgba(37,99,235,.12); }
.hero-media { margin-top: 26px; overflow: hidden; border-radius: 16px; background: var(--panel-soft); }
.hero-media img { width: 100%; max-height: 340px; object-fit: cover; }
.media-placeholder {
    min-height: 220px;
    aspect-ratio: 16 / 7;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(135deg, rgba(96,165,250,.18), rgba(37,99,235,.05)),
        repeating-linear-gradient(90deg, rgba(37,99,235,.06) 0 1px, transparent 1px 36px),
        #E8EEF5;
    color: var(--blue);
    border-radius: inherit;
}
.media-placeholder span { font-weight: 800; letter-spacing: .08em; }
.small-media.media-placeholder { min-height: 150px; aspect-ratio: 16/9; }
.phone-media.media-placeholder { min-height: 300px; aspect-ratio: 4/5; }
.topic-strips { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.topic-strip { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 16px; display: grid; grid-template-columns: 12px 1fr auto; gap: 12px; align-items: start; }
.topic-strip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--blue); margin-top: 8px; }
.topic-strip p { color: var(--text-2); margin: 3px 0 0; font-size: 14px; }
.topic-strip a { color: var(--blue); font-weight: 700; white-space: nowrap; min-height: 44px; display: inline-flex; align-items: center; }
.pulse-wrap { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 22px; align-items: start; }
.pulse-list { display: grid; gap: 14px; }
.pulse-item { padding: 18px; background: #fff; border: 1px solid var(--border); border-radius: 16px; }
.pulse-number, .big-num { color: var(--blue); font-weight: 900; letter-spacing: -.04em; }
.pulse-number { font-size: 22px; display: block; margin-bottom: 8px; }
.three-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { overflow: hidden; }
.card-body { padding: 18px; }
.card-media { border-radius: 0; box-shadow: none; }
.card-media img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.stack-list { display: grid; gap: 16px; }
.feature-row { display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1.15fr); gap: 18px; align-items: stretch; padding: 18px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); }
.feature-row.reverse { grid-template-columns: minmax(0,1.15fr) minmax(0,.85fr); }
.feature-copy { align-self: center; }
.feature-copy .note { color: var(--muted); font-size: 14px; }
.quad-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.quad-card { min-height: 180px; background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 18px; }
.file-list { background: #fff; border: 1px solid var(--border); border-radius: 18px; overflow: hidden; }
.file-row { display: grid; grid-template-columns: 68px 1fr auto; gap: 16px; align-items: center; min-height: 86px; padding: 14px 18px; border-bottom: 1px solid var(--border); }
.file-row:last-child { border-bottom: 0; }
.file-row .file-id { color: var(--blue); font-weight: 900; font-size: 19px; }
.file-row p { margin: 2px 0 0; color: var(--text-2); font-size: 14px; }
.file-row a { color: var(--blue); font-weight: 700; min-height: 44px; display: inline-flex; align-items: center; }
.big-list { display: grid; gap: 12px; }
.big-item { display: grid; grid-template-columns: 92px 1fr; gap: 18px; padding: 18px; background: #fff; border: 1px solid var(--border); border-radius: 16px; }
.big-num { font-size: clamp(38px, 7vw, 64px); line-height: 1; }
.timeline { position: relative; margin-left: 12px; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: rgba(37,99,235,.18); }
.timeline-item { position: relative; padding: 0 0 24px; }
.timeline-item::before { content: ""; position: absolute; left: -30px; top: 7px; width: 16px; height: 16px; border-radius: 50%; background: var(--blue); border: 4px solid #fff; box-shadow: 0 0 0 1px var(--blue); }
.status-tag { display: inline-flex; min-height: 28px; align-items: center; padding: 0 10px; border-radius: 999px; color: var(--blue-deep); background: rgba(37,99,235,.08); font-size: 13px; font-weight: 700; }
.numbered-article { display: grid; gap: 16px; }
.numbered-section { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 20px; }
.numbered-section header { display: flex; align-items: baseline; gap: 12px; margin-bottom: 8px; }
.numbered-section .n { color: var(--blue); font-weight: 900; }
.index-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
.index-card { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 18px; }
.index-card a { color: var(--blue); font-weight: 700; min-height: 44px; display: inline-flex; align-items: center; }
.wide-media { margin: 18px 0 20px; border-radius: 18px; overflow: hidden; background: var(--panel-soft); }
.wide-media img { width: 100%; max-height: 340px; object-fit: cover; }
.guide-bars { display: grid; gap: 10px; }
.guide-bar { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; display: grid; grid-template-columns: 70px 1fr; gap: 16px; }
.guide-bar strong { color: var(--blue); }
.longform { max-width: 900px; }
.longform section { padding: 18px 0; border-bottom: 1px solid rgba(37,99,235,.12); }
.longform section:last-child { border-bottom: 0; }
.editor-note { background: rgba(37,99,235,.06); border-left: 4px solid var(--blue); border-radius: 0 14px 14px 0; padding: 16px 18px; color: var(--text-2); }
.steps { counter-reset: step; display: grid; gap: 12px; }
.step { counter-increment: step; padding: 18px 18px 18px 74px; background: #fff; border: 1px solid var(--border); border-radius: 16px; position: relative; }
.step::before { content: counter(step, decimal-leading-zero); position: absolute; left: 18px; top: 18px; color: var(--blue); font-weight: 900; font-size: 20px; }
.service-split { display: grid; grid-template-columns: minmax(240px,.7fr) minmax(0,1.3fr); gap: 20px; align-items: stretch; }
.service-card { padding: 22px; }
.badge-row { display: flex; align-items: center; gap: 14px; margin: 18px 0 0; }
.badge-row img { width: 54px; height: 54px; object-fit: contain; }
.badge-fallback { width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center; background: var(--blue); color: #fff; font-weight: 900; }
.term-list { display: grid; gap: 14px; }
.term { padding: 18px; background: #fff; border: 1px solid var(--border); border-radius: 16px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 18px; background: #fff; border: 1px solid var(--border); border-radius: 16px; }
.faq-item h2 { font-size: 18px; }
.contact-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
.contact-card { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 18px; }
.site-footer { margin-top: 34px; background: #0B1220; color: #D6E4FF; padding: 40px 0 26px; }
.footer-top { display: grid; gap: 28px; }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-mark-link { min-width: 44px; min-height: 44px; display: flex; align-items: center; }
.footer-mark { max-height: 32px; width: auto; }
.footer-logo-fallback { font-weight: 900; color: #fff; }
.footer-brand div { display: flex; flex-direction: column; }
.footer-brand strong { color: #fff; font-size: 20px; }
.footer-brand span { color: #9FB6D9; font-size: 13px; }
.footer-groups { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.footer-groups section { display: grid; gap: 7px; align-content: start; }
.footer-groups h2 { color: #fff; font-size: 15px; margin-bottom: 4px; }
.footer-groups a { color: #D6E4FF; font-size: 14px; min-height: 44px; display: flex; align-items: center; }
.footer-groups a:hover, .footer-groups a:focus-visible { color: #fff; outline: none; text-decoration: underline; }
.footer-note { color: #AFC2DF; font-size: 14px; max-width: 900px; margin: 0; }
.footer-note p { margin: 0; }
.copyright { color: #8198B8; font-size: 13px; margin: 0; }
.overlay { position: fixed; inset: 0; z-index: 90; background: rgba(11,18,32,.48); opacity: 0; pointer-events: none; transition: opacity .22s ease; }
.overlay.is-active { opacity: 1; pointer-events: auto; }
.mosaic-menu {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: #F3F6F9;
    overflow-y: auto;
    transform: translateY(-104%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform .28s ease, opacity .22s ease, visibility .22s ease;
}
.mosaic-menu.is-open { transform: translateY(0); opacity: 1; visibility: visible; pointer-events: auto; }
.mosaic-shell { padding: 18px 0 32px; }
.mosaic-head { min-height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.mosaic-brand { display: flex; align-items: center; gap: 12px; color: var(--title); }
.mosaic-head .close-btn, .search-head .close-btn { min-height: 44px; padding: 0 14px; color: var(--blue); background: #fff; border: 1px solid var(--border); }
.mosaic-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; align-items: start; }
.mosaic-grid section { display: grid; gap: 10px; }
.mosaic-grid h2 { font-size: 15px; color: var(--text-2); margin: 8px 0 0; }
.mosaic-grid a { min-height: 104px; padding: 16px; background: #fff; border: 1px solid var(--border); border-radius: 16px; display: flex; flex-direction: column; justify-content: center; gap: 5px; box-shadow: 0 8px 22px rgba(11,18,32,.05); }
.mosaic-grid a:hover, .mosaic-grid a:focus-visible { border-color: rgba(37,99,235,.46); outline: 3px solid rgba(37,99,235,.10); }
.mosaic-grid strong { color: var(--title); }
.mosaic-grid span { color: var(--text-2); font-size: 13px; line-height: 1.55; }
.search-layer { position: fixed; z-index: 110; top: 96px; left: 50%; width: min(860px, calc(100% - 32px)); transform: translate(-50%, -18px); opacity: 0; visibility: hidden; pointer-events: none; transition: .2s ease; }
.search-layer.is-open { transform: translate(-50%, 0); opacity: 1; visibility: visible; pointer-events: auto; }
.search-card { background: #F3F6F9; border: 1px solid var(--border); border-radius: 18px; box-shadow: 0 24px 80px rgba(11,18,32,.24); padding: 20px; }
.search-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.search-card label { display: block; color: var(--text-2); margin-bottom: 8px; }
.search-card input { width: 100%; min-height: 48px; border: 1px solid rgba(37,99,235,.24); border-radius: 14px; background: #fff; color: var(--title); padding: 0 14px; outline: none; }
.search-card input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.search-presets { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.search-presets a { min-height: 44px; display: inline-flex; align-items: center; padding: 0 14px; border-radius: 999px; background: #fff; color: var(--blue); border: 1px solid var(--border); }
.search-empty { color: var(--muted); margin-top: 12px; }
.mobile-bottom { display: none; }
@media (min-width: 980px) {
    .mosaic-grid section:last-child { grid-column: 1 / -1; grid-template-columns: repeat(4,1fr); }
    .mosaic-grid section:last-child h2 { grid-column: 1 / -1; }
}
@media (max-width: 860px) {
    :root { --header-h: 92px; }
    .desktop-tabs { display: none; }
    .command-inner { grid-template-columns: 72px 1fr 92px; }
    .app-link { padding: 0 14px; }
    .site-main { padding-top: calc(var(--header-h) + 22px); }
    .topic-strips, .three-grid, .pulse-wrap, .feature-row, .feature-row.reverse, .service-split { grid-template-columns: 1fr; }
    .quad-grid { grid-template-columns: repeat(2,1fr); }
    .footer-groups { grid-template-columns: repeat(2,1fr); }
    .mosaic-grid { grid-template-columns: repeat(2,1fr); }
    .search-layer { inset: 0; width: 100%; transform: translateY(-12px); background: #F3F6F9; overflow-y: auto; }
    .search-layer.is-open { transform: translateY(0); }
    .search-card { min-height: 100%; border: 0; border-radius: 0; box-shadow: none; padding: 20px 16px 90px; }
    .mobile-bottom {
        position: fixed;
        z-index: 70;
        left: 0;
        right: 0;
        bottom: 0;
        min-height: 50px;
        padding-bottom: env(safe-area-inset-bottom);
        display: grid;
        grid-template-columns: repeat(5,1fr);
        background: rgba(255,255,255,.97);
        border-top: 1px solid var(--border);
        backdrop-filter: blur(10px);
    }
    .mobile-bottom a { min-height: 50px; display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 13px; }
    .mobile-bottom a.is-current { color: var(--blue); font-weight: 800; }
    .site-footer { padding-bottom: calc(78px + env(safe-area-inset-bottom)); }
}
@media (max-width: 620px) {
    .shell { width: min(100% - 32px, 1180px); }
    .status-inner { width: calc(100% - 24px); }
    .command-inner { width: calc(100% - 24px); grid-template-columns: 56px 1fr 88px; gap: 6px; }
    .command-logo strong { font-size: 18px; }
    .app-link { padding: 0 12px; font-size: 14px; }
    .topic-strips, .index-grid, .contact-grid { grid-template-columns: 1fr; }
    .topic-strip { grid-template-columns: 12px 1fr; }
    .topic-strip a { grid-column: 2; }
    .quad-grid { grid-template-columns: 1fr; }
    .file-row { grid-template-columns: 52px 1fr; }
    .file-row a { grid-column: 2; }
    .big-item { grid-template-columns: 68px 1fr; }
    .big-num { font-size: 40px; }
    .guide-bar { grid-template-columns: 52px 1fr; }
    .footer-groups { grid-template-columns: 1fr 1fr; gap: 18px 12px; }
    .mosaic-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .mosaic-grid a { min-height: 118px; padding: 13px; }
    .mosaic-grid span { font-size: 12px; }
}
@media (max-width: 420px) {
    .mosaic-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .mosaic-grid a { min-height: 126px; }
    .footer-groups { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; }
}