:root {
    --ink: #24212b;
    --muted: #716b7b;
    --paper: #fffaf4;
    --panel: #ffffff;
    --coral: #f25f5c;
    --coral-dark: #cf3e48;
    --cyan: #46c6cf;
    --yellow: #ffc857;
    --violet: #6554c0;
    --line: #eadfd8;
    --shadow: 0 18px 40px rgba(70, 46, 57, .09);
    --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    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; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 1px solid rgba(234, 223, 216, .85);
    background: rgba(255, 250, 244, .94);
    backdrop-filter: blur(12px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: .02em; }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.brand-name { font-size: 18px; }
.nav-links { display: flex; align-items: center; gap: 7px; }
.nav-links a { padding: 9px 13px; border-radius: 10px; color: #554d5d; font-size: 14px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--coral-dark); background: #fff0ec; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 18px;
    border: 0;
    border-radius: 12px;
    color: #fff;
    background: var(--coral);
    box-shadow: 0 9px 18px rgba(242, 95, 92, .22);
    font-weight: 800;
    font-size: 14px;
    cursor: pointer;
    transition: transform .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--coral-dark); }
.menu-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 10px; width: 42px; height: 42px; color: var(--ink); font-size: 20px; }
.hero { padding: 76px 0 64px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; width: 180px; height: 180px; right: 2%; top: 8%; border: 28px solid rgba(70, 198, 207, .14); border-radius: 50%; pointer-events: none; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 62px; align-items: center; position: relative; z-index: 1; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 10px; color: #a63e4b; background: #fff0ec; border-radius: 999px; font-size: 12px; font-weight: 800; letter-spacing: .06em; }
.eyebrow::before { content: "✦"; color: var(--yellow); }
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -.025em; }
h1 { margin-top: 18px; max-width: 560px; font-size: clamp(38px, 5vw, 64px); }
.hero-lead { margin: 22px 0 0; color: var(--muted); font-size: 18px; max-width: 590px; }
.hero-actions { margin-top: 29px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.ghost-link { color: var(--violet); font-weight: 800; font-size: 14px; }
.hero-note { margin-top: 18px; color: #8b8190; font-size: 12px; }
.hero-art { position: relative; min-height: 430px; display: flex; align-items: center; justify-content: center; }
.hero-art::before { content: ""; position: absolute; width: 310px; height: 310px; border-radius: 50%; background: #ffe6cf; }
.hero-phone { position: relative; width: min(280px, 72vw); padding: 11px; border-radius: 31px; background: #24212b; box-shadow: 0 28px 45px rgba(43, 28, 46, .25); transform: rotate(4deg); }
.hero-phone img { width: 100%; border-radius: 21px; }
.stamp { position: absolute; right: 3%; bottom: 16%; padding: 13px 16px; background: var(--cyan); color: #183b40; border-radius: 14px; font-size: 12px; font-weight: 800; transform: rotate(-7deg); box-shadow: 0 12px 20px rgba(70, 198, 207, .2); }
.section { padding: 78px 0; }
.section.alt { background: #fff; border-top: 1px solid #f0e5df; border-bottom: 1px solid #f0e5df; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 30px; }
.section-kicker { color: var(--coral-dark); font-size: 12px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
.section h2 { margin-top: 7px; font-size: clamp(27px, 3vw, 39px); }
.section-head a { color: var(--violet); font-weight: 800; font-size: 14px; white-space: nowrap; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
.feature-card { min-height: 220px; padding: 24px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); box-shadow: var(--shadow); }
.feature-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; color: #fff; background: var(--violet); font-size: 20px; }
.feature-card:nth-child(2) .feature-icon { background: var(--cyan); color: #173f44; }
.feature-card:nth-child(3) .feature-icon { background: var(--yellow); color: #5c4210; }
.feature-card:nth-child(4) .feature-icon { background: var(--coral); }
.feature-card h3 { margin-top: 18px; font-size: 18px; }
.feature-card p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.showcase { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; align-items: center; }
.showcase-copy p { color: var(--muted); }
.check-list { display: grid; gap: 13px; margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li { display: flex; gap: 11px; align-items: flex-start; font-size: 14px; }
.check-list li::before { content: "✓"; flex: 0 0 auto; width: 22px; height: 22px; display: grid; place-items: center; color: #fff; background: var(--coral); border-radius: 50%; font-size: 12px; font-weight: 900; }
.screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; align-items: stretch; }
.screen-card { padding: 11px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow); overflow: hidden; }
.screen-card img { width: 100%; aspect-ratio: 3 / 5; object-fit: cover; border-radius: 13px; background: #f3ebe6; }
.screen-card:nth-child(2) { transform: translateY(-25px); }
.screen-card figcaption { padding: 9px 3px 1px; color: var(--muted); font-size: 12px; text-align: center; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); background: #fff; overflow: hidden; }
.stat { padding: 24px 15px; text-align: center; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; color: var(--coral-dark); font-size: 29px; line-height: 1; }
.stat span { display: block; margin-top: 9px; color: var(--muted); font-size: 12px; }
.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
.path-card { padding: 23px; border-radius: var(--radius); color: #fff; min-height: 175px; position: relative; overflow: hidden; }
.path-card::after { content: "↗"; position: absolute; right: 20px; bottom: 14px; font-size: 26px; opacity: .75; }
.path-card:nth-child(1) { background: var(--violet); }
.path-card:nth-child(2) { background: #d94958; }
.path-card:nth-child(3) { background: #249da6; }
.path-card h3 { font-size: 20px; }
.path-card p { margin: 9px 0 0; color: rgba(255,255,255,.83); font-size: 13px; max-width: 240px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
.quote { margin: 0; padding: 24px; border-left: 4px solid var(--yellow); background: #fff; border-radius: 0 15px 15px 0; box-shadow: var(--shadow); }
.quote p { margin: 0; font-size: 15px; }
.quote cite { display: block; margin-top: 15px; color: var(--muted); font-size: 12px; font-style: normal; }
.article-hero { padding: 62px 0 44px; background: #fff; border-bottom: 1px solid var(--line); }
.article-hero h1 { max-width: 760px; font-size: clamp(34px, 5vw, 54px); }
.article-hero p { margin: 18px 0 0; max-width: 730px; color: var(--muted); font-size: 17px; }
.article-layout { display: grid; grid-template-columns: 1fr 280px; gap: 42px; align-items: start; }
.article-body { min-width: 0; }
.article-body h2 { margin: 37px 0 16px; padding-left: 13px; border-left: 4px solid var(--coral); font-size: 27px; }
.article-body h3 { margin: 25px 0 9px; font-size: 19px; }
.article-body p { margin: 0 0 15px; color: #514b59; }
.article-body ul, .article-body ol { margin: 10px 0 19px; padding-left: 22px; color: #514b59; }
.article-body li { margin: 7px 0; }
.tip { padding: 18px 20px; border-radius: 13px; background: #fff2de; border: 1px solid #f3d6a4; color: #6c501e; }
.side-box { position: sticky; top: 98px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.side-box h2 { font-size: 18px; }
.side-box nav { display: grid; gap: 7px; margin-top: 15px; }
.side-box nav a { padding: 8px 10px; border-radius: 8px; color: var(--muted); font-size: 13px; }
.side-box nav a:hover { color: var(--coral-dark); background: #fff0ec; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: 13px; background: #fff; overflow: hidden; }
.faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 18px 20px; border: 0; background: transparent; color: var(--ink); text-align: left; font: inherit; font-weight: 800; cursor: pointer; }
.faq-question span:last-child { color: var(--coral); font-size: 23px; line-height: 1; }
.faq-answer { display: none; padding: 0 20px 18px; color: var(--muted); font-size: 14px; }
.faq-item.open .faq-answer { display: block; }
.faq-item.open .faq-question span:last-child { transform: rotate(45deg); }
.footer { margin-top: 35px; padding: 35px 0 28px; background: #24212b; color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 35px; }
.footer .brand-name { color: #fff; }
.footer h2 { font-size: 15px; }
.footer p, .footer li, .footer a { color: #c9c3cd; font-size: 13px; }
.footer p { margin: 11px 0 0; }
.footer ul { padding: 0; margin: 9px 0 0; list-style: none; }
.footer li { margin: 5px 0; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 24px; margin-top: 24px; border-top: 1px solid rgba(255,255,255,.15); color: #aaa2af; font-size: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 900px) {
    .hero-grid, .showcase, .article-layout { grid-template-columns: 1fr; }
    .hero { padding-top: 54px; }
    .hero-art { min-height: 365px; }
    .side-box { position: static; order: -1; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
    .container { width: min(100% - 28px, 560px); }
    .nav-wrap { min-height: 66px; }
    .menu-toggle { display: block; }
    .nav-links { position: absolute; top: 66px; left: 14px; right: 14px; display: none; flex-direction: column; align-items: stretch; padding: 10px; border: 1px solid var(--line); border-radius: 14px; background: #fffaf4; box-shadow: var(--shadow); }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 11px 13px; }
    .nav-links .download-btn { margin-top: 4px; }
    h1 { font-size: 42px; }
    .hero-lead { font-size: 16px; }
    .hero-art { min-height: 315px; }
    .hero-phone { width: 220px; }
    .hero-art::before { width: 230px; height: 230px; }
    .stamp { right: 0; bottom: 6%; }
    .section { padding: 56px 0; }
    .section-head { display: block; }
    .section-head a { display: inline-block; margin-top: 14px; }
    .feature-grid, .path-grid, .quote-grid, .stats { grid-template-columns: 1fr; }
    .stat { border-right: 0; border-bottom: 1px solid var(--line); }
    .stat:last-child { border-bottom: 0; }
    .screens { gap: 9px; }
    .screen-card { padding: 7px; border-radius: 14px; }
    .screen-card:nth-child(2) { transform: translateY(-12px); }
    .footer-grid { grid-template-columns: 1fr; gap: 22px; }
    .footer-bottom { display: block; }
    .footer-bottom span { display: block; margin-top: 7px; }
}