:root {
    --ink: #2f3045;
    --ink-deep: #252638;
    --slate: #5d5b78;
    --slate-soft: #7c7994;
    --gold: #dfb894;
    --gold-light: #f1d8c0;
    --cream: #f7f2ec;
    --cream-deep: #eee5dc;
    --paper: #fffdfa;
    --muted: #757382;
    --line: rgba(62, 61, 82, 0.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    min-width: 1120px;
    margin: 0;
    color: var(--ink);
    background: var(--cream);
    font-family: "Avenir Next", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
}

button, a { color: inherit; font: inherit; }
button { border: 0; }
a { text-decoration: none; }

.site-shell { overflow: hidden; }

.topbar {
    position: relative;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(1380px, calc(100vw - 96px));
    height: 88px;
    margin: 0 auto;
    border-bottom: 1px solid var(--line);
}

.brand, .app-brand, .footer-brand {
    display: inline-flex;
    align-items: center;
}

.brand { gap: 13px; }

.brand-mark {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 50%;
    background: rgba(255, 253, 250, 0.64);
    box-shadow: inset 0 0 0 1px rgba(93, 91, 120, 0.08);
}

.brand-mark img { width: 34px; height: 34px; object-fit: contain; }
.brand-name { font-size: 21px; font-weight: 700; letter-spacing: 0.08em; }

.nav-links { display: flex; align-items: center; gap: 40px; }
.nav-links a { color: #666474; font-size: 14px; transition: color .2s ease; }
.nav-links a:hover { color: var(--ink); }

.nav-download {
    height: 42px;
    padding: 0 20px;
    color: #fff;
    background: var(--ink-deep);
    border-radius: 999px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: transform .2s ease, background .2s ease;
}

.nav-download:hover { background: var(--slate); transform: translateY(-1px); }

.hero {
    display: grid;
    grid-template-columns: .83fr 1.17fr;
    align-items: center;
    gap: 38px;
    width: min(1380px, calc(100vw - 96px));
    min-height: 720px;
    margin: 0 auto;
    padding: 54px 0 72px;
}

.hero-copy { position: relative; z-index: 4; padding-left: 30px; }

.eyebrow, .section-kicker {
    margin: 0;
    color: var(--slate);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .2em;
}

.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow span { width: 26px; height: 1px; background: var(--gold); }

.hero h1 {
    margin: 23px 0 22px;
    font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
    font-size: clamp(58px, 5vw, 78px);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: -.04em;
}

.hero h1 em { color: var(--slate); font-style: normal; }

.hero-lead {
    width: 500px;
    margin: 0;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.9;
}

.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 36px; }

.primary-action {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    min-width: 188px;
    height: 54px;
    padding: 0 20px 0 24px;
    color: #fff;
    background: var(--ink-deep);
    border-radius: 999px;
    cursor: pointer;
    font-weight: 600;
    box-shadow: 0 18px 38px rgba(47, 48, 69, .18);
    transition: transform .2s ease, box-shadow .2s ease;
}

.primary-action:hover { transform: translateY(-2px); box-shadow: 0 22px 44px rgba(47, 48, 69, .24); }
.primary-action span { color: var(--gold-light); font-size: 20px; }
.text-action { color: var(--slate); font-size: 14px; font-weight: 600; }
.text-action span { margin-left: 8px; }

.hero-notes { display: flex; gap: 23px; margin-top: 36px; color: #8a8792; font-size: 12px; }
.hero-notes span { display: flex; align-items: center; gap: 9px; }
.hero-notes span::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--gold); }

.hero-visual {
    position: relative;
    min-height: 590px;
    isolation: isolate;
}

.hero-visual::before {
    position: absolute;
    inset: 2% 0 1% 7%;
    z-index: -3;
    border-radius: 52% 48% 48% 52% / 46% 50% 50% 54%;
    background:
        radial-gradient(circle at 72% 22%, rgba(238, 204, 177, .88), transparent 29%),
        radial-gradient(circle at 25% 80%, rgba(173, 168, 193, .5), transparent 34%),
        linear-gradient(135deg, #fbf8f4, #eee7e5);
    box-shadow: inset 0 0 0 1px rgba(93, 91, 120, .07);
    content: "";
}

.orbit { position: absolute; z-index: -2; border: 1px solid rgba(93, 91, 120, .13); border-radius: 50%; }
.orbit-one { top: 10px; right: -75px; width: 570px; height: 570px; }
.orbit-two { top: 66px; right: -18px; width: 452px; height: 452px; border-color: rgba(223, 184, 148, .35); }

.logo-halo {
    position: absolute;
    top: 22px;
    right: 40px;
    display: grid;
    width: 108px;
    height: 108px;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, .7);
    border-radius: 50%;
    background: rgba(255, 253, 250, .58);
    backdrop-filter: blur(10px);
    box-shadow: 0 18px 40px rgba(67, 63, 79, .12);
}

.logo-halo img { width: 78px; height: 78px; object-fit: contain; }

.app-card {
    position: absolute;
    top: 95px;
    right: 72px;
    display: grid;
    grid-template-columns: 180px 1fr;
    width: min(680px, calc(100% - 36px));
    height: 430px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, .78);
    border-radius: 26px;
    background: rgba(255, 253, 250, .86);
    box-shadow: 0 34px 80px rgba(57, 54, 76, .22);
    backdrop-filter: blur(20px);
    transform: rotate(-1.5deg);
}

.app-sidebar { padding: 28px 22px; color: #fff; background: linear-gradient(155deg, #5f5c79, #39394f); }
.app-brand { gap: 9px; font-weight: 700; }
.app-brand img { width: 28px; height: 28px; object-fit: contain; }

.avatar-stack { display: flex; margin: 42px 0 28px; padding-left: 8px; }
.avatar-stack i { width: 34px; height: 34px; margin-left: -8px; border: 2px solid #4d4c66; border-radius: 50%; background: #d7b798; }
.avatar-stack i:nth-child(2) { background: #9e9ab2; }
.avatar-stack i:nth-child(3) { background: #eee0d2; }

.side-line { width: 100%; height: 38px; margin-top: 10px; border-radius: 11px; background: rgba(255, 255, 255, .08); }
.side-line.active { background: rgba(255, 255, 255, .17); }
.side-line.short { width: 72%; }

.chat-panel { display: flex; min-width: 0; flex-direction: column; }
.chat-head { display: flex; align-items: center; justify-content: space-between; height: 76px; padding: 0 26px; border-bottom: 1px solid var(--line); }
.chat-head strong, .chat-head span { display: block; }
.chat-head strong { font-size: 16px; }
.chat-head span { margin-top: 4px; color: #9895a1; font-size: 11px; }
.chat-head b { color: #9c99a4; font-size: 20px; letter-spacing: 2px; }

.chat-body { display: flex; flex: 1; flex-direction: column; padding: 20px 26px; background: rgba(249, 246, 242, .7); }
.day-label { align-self: center; color: #a09ca6; font-size: 10px; }
.bubble { max-width: 74%; margin-top: 18px; padding: 12px 15px; border-radius: 16px 16px 16px 5px; font-size: 12px; line-height: 1.55; }
.bubble.received { color: #5e5c69; background: #fff; box-shadow: 0 8px 22px rgba(57, 54, 76, .07); }
.bubble.sent { align-self: flex-end; color: #fff; background: var(--slate); border-radius: 16px 16px 5px 16px; }

.file-message { display: flex; align-items: center; gap: 12px; width: 68%; margin-top: 12px; padding: 11px; border: 1px solid rgba(223, 184, 148, .42); border-radius: 14px; background: #fff9f4; }
.file-message i { display: grid; width: 34px; height: 38px; place-items: center; color: #997252; background: #f2d9c2; border-radius: 7px; font-size: 9px; font-style: normal; font-weight: 700; }
.file-message strong, .file-message span { display: block; }
.file-message strong { font-size: 11px; }
.file-message span { margin-top: 3px; color: #a09ca6; font-size: 9px; }

.composer { display: flex; align-items: center; gap: 12px; height: 64px; padding: 0 22px; border-top: 1px solid var(--line); background: rgba(255, 255, 255, .72); }
.composer span { flex: 1; height: 36px; padding: 10px 13px; color: #aaa6af; background: #f5f1ed; border-radius: 12px; font-size: 11px; }
.composer b { padding: 9px 14px; color: #fff; background: var(--ink); border-radius: 11px; font-size: 11px; }

.floating-card { position: absolute; z-index: 4; padding: 15px 18px; border: 1px solid rgba(255, 255, 255, .76); border-radius: 17px; background: rgba(255, 253, 250, .78); box-shadow: 0 18px 44px rgba(57, 54, 76, .14); backdrop-filter: blur(14px); }
.floating-card span, .floating-card strong { display: block; }
.floating-card span { color: #9995a0; font-size: 10px; }
.floating-card strong { margin-top: 5px; color: var(--ink); font-size: 12px; }
.secure-card { right: 12px; bottom: 44px; }
.secure-card i { display: inline-block; width: 7px; height: 7px; margin-right: 4px; border-radius: 50%; background: #8da88d; }
.sync-card { bottom: 10px; left: 20px; }

.statement { padding: 120px 8vw 140px; color: #f9f5f0; background: var(--ink-deep); text-align: center; }
.statement p { margin: 0 0 28px; color: var(--gold); font-size: 13px; letter-spacing: .16em; }
.statement h2 { margin: 0; font-family: "Songti SC", "STSong", serif; font-size: 48px; font-weight: 400; line-height: 1.55; letter-spacing: .02em; }

.values { display: grid; grid-template-columns: .72fr 1.28fr; gap: 80px; width: min(1260px, calc(100vw - 120px)); margin: 0 auto; padding: 140px 0; }
.section-intro { padding-top: 18px; }
.section-intro h2, .download-copy h2 { margin: 22px 0 24px; font-family: "Songti SC", "STSong", serif; font-size: 44px; font-weight: 500; line-height: 1.42; }
.section-intro > p:last-child, .download-copy > p:last-child { max-width: 360px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.9; }

.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.value-card { position: relative; min-height: 294px; padding: 26px; overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: rgba(255, 253, 250, .68); }
.value-primary { grid-row: span 2; min-height: 606px; color: #fff; background: linear-gradient(155deg, #63607d, #39394f); }
.value-index { color: #aaa6b2; font-size: 11px; letter-spacing: .12em; }
.value-primary .value-index { color: rgba(255, 255, 255, .54); }
.value-card h3 { position: absolute; bottom: 64px; left: 26px; margin: 0; font-size: 21px; }
.value-card p { position: absolute; right: 26px; bottom: 23px; left: 26px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.value-primary p { color: rgba(255, 255, 255, .64); }

.value-symbol { position: absolute; top: 74px; right: 26px; bottom: 136px; left: 26px; }
.symbol-flow { display: grid; place-items: center; }
.symbol-flow::before, .symbol-flow::after { position: absolute; width: 190px; height: 190px; border: 1px solid rgba(255, 255, 255, .13); border-radius: 50%; content: ""; }
.symbol-flow::after { width: 115px; height: 115px; border-color: rgba(223, 184, 148, .55); }
.symbol-flow i { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 7px rgba(223, 184, 148, .11); }
.symbol-flow i:nth-child(1) { transform: translate(-95px, -15px); }
.symbol-flow i:nth-child(2) { transform: translate(82px, -48px); }
.symbol-flow i:nth-child(3) { transform: translate(50px, 85px); }

.symbol-shield { display: grid; place-items: center; }
.symbol-shield i { width: 66px; height: 76px; border: 2px solid var(--slate); border-radius: 34px 34px 42px 42px; transform: scaleX(.82); }
.symbol-shield i::after { display: block; width: 8px; height: 8px; margin: 31px auto 0; border-radius: 50%; background: var(--gold); content: ""; }
.symbol-devices { display: flex; align-items: center; justify-content: center; gap: 10px; }
.symbol-devices i:first-child { width: 76px; height: 52px; border: 2px solid var(--slate); border-radius: 8px; }
.symbol-devices i:last-child { width: 27px; height: 51px; border: 2px solid var(--gold); border-radius: 8px; }

.download-section { display: grid; grid-template-columns: .72fr 1.28fr; gap: 80px; padding: 118px max(60px, calc((100vw - 1260px) / 2)); background: #ede5dd; }
.download-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.download-card { display: grid; min-height: 320px; place-items: center; padding: 28px; border: 1px solid rgba(62, 61, 82, .1); border-radius: 24px; background: rgba(255, 253, 250, .82); text-align: center; }
.download-meta span, .download-meta strong { display: block; }
.download-meta span { color: var(--slate); font-size: 13px; font-weight: 700; }
.download-meta strong { margin-top: 8px; font-size: 18px; }
.download-card p { margin: 0; color: var(--muted); font-size: 12px; }
.desktop-card { justify-items: stretch; align-content: space-between; text-align: left; }
.desktop-platform-mark { display: grid; width: 62px; height: 62px; place-items: center; color: #fff; background: var(--slate); border-radius: 18px; font-size: 24px; font-weight: 600; }
.desktop-platform-mark.mac-mark { color: var(--ink); background: var(--gold-light); }
.desktop-download-button { width: 100%; height: 44px; color: #fff; background: var(--ink-deep); border-radius: 999px; cursor: pointer; font-size: 13px; font-weight: 600; transition: transform .2s ease, background .2s ease; }
.desktop-download-button:not(:disabled):hover { background: var(--slate); transform: translateY(-1px); }
.desktop-download-button:disabled { color: #9995a0; background: #eee9e4; cursor: default; }
.platform-qrcode, .platform-qrcode img { width: 138px; height: 138px; }
.platform-qrcode { padding: 8px; border-radius: 15px; background: #fff; }
.platform-qrcode:empty::before { display: grid; width: 122px; height: 122px; place-items: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 10px; content: "待配置"; font-size: 12px; }

.site-footer { display: flex; align-items: center; justify-content: space-between; min-height: 118px; padding: 0 max(48px, calc((100vw - 1380px) / 2)); color: rgba(255, 255, 255, .6); background: var(--ink-deep); }
.footer-brand { gap: 10px; color: #fff; font-size: 16px; font-weight: 700; }
.footer-brand img { width: 30px; height: 30px; object-fit: contain; }
.site-footer p { margin: 0; font-size: 12px; letter-spacing: .08em; }
@media (max-width: 1280px) {
    .topbar, .hero { width: calc(100vw - 56px); }
    .hero { grid-template-columns: .78fr 1.22fr; gap: 12px; }
    .hero-copy { padding-left: 10px; }
    .hero-lead { width: 450px; }
    .app-card { right: 38px; grid-template-columns: 160px 1fr; }
    .values { width: calc(100vw - 80px); gap: 48px; }
}

@media (prefers-reduced-motion: no-preference) {
    .logo-halo { animation: float 5s ease-in-out infinite; }
    .secure-card { animation: float 5.6s ease-in-out .4s infinite; }
    @keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
}