:root {
    --chestnut: #8e432d;
    --chestnut-deep: #5d2b23;
    --orange: #e89538;
    --orange-soft: #f6c66d;
    --cream: #fff8ea;
    --paper: #fffdf8;
    --ink: #2b2825;
    --muted: #766c64;
    --line: #eadbc9;
    --sage: #527267;
    --shadow: 0 18px 50px rgba(93, 43, 35, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--cream);
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 253, 248, .94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
}
.nav-wrap, .container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .04em; color: var(--chestnut-deep); }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand-text { font-size: 1.2rem; }
.nav-links { display: flex; align-items: center; gap: 26px; color: var(--muted); font-size: .94rem; }
.nav-links a { position: relative; padding: 7px 0; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px; background: var(--orange); transition: right .2s ease; }
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { right: 0; }
.nav-cta, .button-primary, .button-light {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    border-radius: 6px; padding: 11px 20px; font-weight: 700; border: 1px solid transparent;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.nav-cta, .button-primary { color: #fff; background: var(--chestnut); box-shadow: 0 8px 20px rgba(142, 67, 45, .2); }
.button-light { color: var(--chestnut-deep); background: #fff; border-color: var(--line); }
.nav-cta:hover, .button-primary:hover, .button-light:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(93, 43, 35, .18); }
.hero { padding: 74px 0 76px; background: linear-gradient(135deg, #fff9ec 0%, #f8e1bc 100%); border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; align-items: center; gap: 64px; }
.eyebrow { margin: 0 0 14px; color: var(--sage); font-size: .78rem; letter-spacing: .18em; font-weight: 800; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.25; color: var(--chestnut-deep); margin: 0; }
h1 { font-size: clamp(2.35rem, 5vw, 4.6rem); letter-spacing: -.03em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.55rem); }
h3 { font-size: 1.18rem; }
.hero-copy > p { max-width: 640px; margin: 22px 0 30px; color: #5f5148; font-size: 1.08rem; }
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero-note { margin-top: 18px; color: var(--muted); font-size: .87rem; }
.hero-art { position: relative; min-height: 410px; display: grid; place-items: center; }
.hero-art::before { content: ""; width: 330px; height: 330px; border-radius: 50%; background: var(--orange-soft); opacity: .42; position: absolute; right: 6%; top: 8%; }
.hero-art::after { content: ""; width: 210px; height: 210px; border: 1px solid rgba(142, 67, 45, .3); border-radius: 50%; position: absolute; left: 10%; bottom: 9%; }
.device { position: relative; z-index: 1; width: min(292px, 80%); padding: 11px; border-radius: 24px; background: #292321; box-shadow: var(--shadow); transform: rotate(4deg); }
.device img { width: 100%; border-radius: 16px; }
.float-tag { position: absolute; z-index: 2; right: 2%; top: 18%; padding: 10px 14px; border-radius: 6px; color: #fff; background: var(--sage); font-size: .82rem; box-shadow: 0 8px 22px rgba(82, 114, 103, .25); }
.float-tag.bottom { top: auto; right: auto; left: 2%; bottom: 16%; background: var(--chestnut); }
.stats { background: var(--paper); border-bottom: 1px solid var(--line); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 25px 20px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; color: var(--chestnut); font-size: 1.55rem; }
.stat span { color: var(--muted); font-size: .88rem; }
.section { padding: 86px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.section-kicker { color: var(--orange); font-weight: 800; letter-spacing: .08em; font-size: .78rem; }
.section-head p { max-width: 470px; margin: 0; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { min-height: 220px; padding: 26px; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(93, 43, 35, .05); }
.feature-icon { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 18px; border-radius: 50%; color: var(--chestnut-deep); background: #ffe5ad; font-weight: 900; }
.feature p { margin: 11px 0 0; color: var(--muted); font-size: .94rem; }
.showcase { background: #342a27; color: #fff; }
.showcase h2 { color: #fff7e7; }
.showcase .section-kicker { color: var(--orange-soft); }
.showcase .section-head p { color: #d9c7bc; }
.screens { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: end; }
.screen-frame { padding: 8px; background: #1d1918; border-radius: 15px; box-shadow: 0 18px 30px rgba(0,0,0,.25); }
.screen-frame:nth-child(even) { transform: translateY(26px); }
.screen-frame img { width: 100%; max-width: 400px; border-radius: 10px; }
.screen-caption { margin-top: 12px; color: #f7dcc0; font-size: .86rem; text-align: center; }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 62px; align-items: start; }
.outline-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 16px; }
.outline-list li { display: grid; grid-template-columns: 38px 1fr; gap: 14px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.outline-list b { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: #fff; background: var(--chestnut); font-size: .85rem; }
.outline-list strong { color: var(--chestnut-deep); }
.outline-list span { display: block; color: var(--muted); font-size: .92rem; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { padding: 25px; background: #f4e6d4; border-left: 3px solid var(--orange); }
.quote p { margin: 0 0 14px; color: #4d4138; }
.quote cite { color: var(--sage); font-style: normal; font-size: .88rem; }
.cta-band { padding: 64px 0; color: #fff; background: var(--chestnut-deep); }
.cta-band .cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 26px; }
.cta-band h2 { color: #fff; font-size: 2rem; }
.cta-band p { margin: 8px 0 0; color: #e9d6c6; }
.cta-band .button-primary { color: var(--chestnut-deep); background: var(--orange-soft); box-shadow: none; }
.page-hero { padding: 68px 0 58px; background: linear-gradient(135deg, #fff9ec, #f2dfbf); border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3.5rem); }
.page-hero .lead { max-width: 720px; margin: 18px 0 0; color: #65574e; font-size: 1.05rem; }
.article { padding: 70px 0; }
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 52px; align-items: start; }
.article-main { min-width: 0; }
.article-main h2 { margin: 42px 0 18px; font-size: 1.65rem; }
.article-main h2:first-child { margin-top: 0; }
.article-main h3 { margin: 24px 0 8px; }
.article-main p { margin: 0 0 16px; color: #514841; }
.article-main ul, .article-main ol { padding-left: 22px; color: #514841; }
.article-main li { margin: 8px 0; }
.side-nav { position: sticky; top: 102px; padding: 22px; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; }
.side-nav strong { display: block; margin-bottom: 10px; color: var(--chestnut-deep); }
.side-nav a { display: block; padding: 8px 0; color: var(--muted); border-bottom: 1px solid var(--line); font-size: .9rem; }
.side-nav a:last-child { border-bottom: 0; }
.steps { display: grid; gap: 14px; margin: 22px 0; }
.step { display: grid; grid-template-columns: 42px 1fr; gap: 16px; padding: 19px; background: var(--paper); border: 1px solid var(--line); border-radius: 8px; }
.step-num { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; color: #fff; background: var(--sage); font-weight: 800; }
.step p { margin: 5px 0 0; font-size: .94rem; }
.faq-list { display: grid; gap: 10px; }
details { padding: 18px 20px; background: var(--paper); border: 1px solid var(--line); border-radius: 7px; }
summary { cursor: pointer; color: var(--chestnut-deep); font-weight: 800; }
details p { margin: 12px 0 0; }
.footer { padding: 44px 0 24px; color: #d8c7bc; background: #2e2724; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 30px; padding-bottom: 30px; border-bottom: 1px solid rgba(255,255,255,.14); }
.footer .brand { color: #fff; }
.footer p, .footer a { color: #c7b6aa; font-size: .88rem; }
.footer h3 { color: #fff1dc; font-size: 1rem; margin-bottom: 12px; }
.footer-links { display: grid; gap: 5px; }
.copyright { margin: 22px 0 0; font-size: .8rem; color: #a99588; }
.disclaimer { margin: 14px 0 0; font-size: .78rem; color: #a99588; }
.reveal { animation: rise .65s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 820px) {
    .nav-wrap { min-height: 68px; }
    .nav-links { gap: 14px; font-size: .85rem; }
    .nav-cta { padding: 9px 13px; }
    .hero-grid, .split, .article-grid { grid-template-columns: 1fr; gap: 36px; }
    .hero { padding-top: 52px; }
    .hero-art { min-height: 340px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat:nth-child(2) { border-right: 0; }
    .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .feature-grid, .quote-grid { grid-template-columns: 1fr; }
    .screens { grid-template-columns: repeat(2, 1fr); }
    .screen-frame:nth-child(even) { transform: none; }
    .side-nav { position: static; }
    .cta-band .cta-inner { align-items: flex-start; flex-direction: column; }
    .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .container, .nav-wrap { width: min(100% - 28px, 1160px); }
    .nav-links a:not(:last-child) { display: none; }
    .brand-text { font-size: 1.05rem; }
    .hero-art { min-height: 300px; }
    .device { width: 230px; }
    .float-tag { right: 0; }
    .float-tag.bottom { left: 0; }
    .screens { gap: 10px; }
    .section, .article { padding: 56px 0; }
}