:root {
    --cream: #fff7e8;
    --cream-2: #fffdf7;
    --navy: #16213e;
    --navy-soft: #273657;
    --orange: #f28c38;
    --orange-soft: #ffe0bd;
    --purple: #8d7cf6;
    --purple-soft: #ebe7ff;
    --green: #41b883;
    --ink: #1d2433;
    --muted: #65728a;
    --line: rgba(22, 33, 62, .12);
    --shadow: 0 18px 50px rgba(22, 33, 62, .12);
    --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(141,124,246,.16), transparent 32rem),
        radial-gradient(circle at 88% 12%, rgba(242,140,56,.16), transparent 28rem),
        linear-gradient(180deg, var(--cream), #ffffff 44%, #f8f6ff);
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
.skip-link { position: absolute; left: -999px; top: 0; background: var(--navy); color: #fff; padding: .6rem 1rem; z-index: 20; }
.skip-link:focus { left: 1rem; top: 1rem; }
.site-header { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(16px); background: rgba(255, 247, 232, .88); border-bottom: 1px solid var(--line); }
.topbar { max-width: 1180px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; color: var(--navy); letter-spacing: .03em; }
.brand-mark { width: 42px; height: 42px; border-radius: 14px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--navy), var(--purple)); box-shadow: 0 10px 22px rgba(22,33,62,.18); }
.brand-text { font-size: 1.18rem; }
.site-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.site-nav a { padding: 8px 12px; border-radius: 999px; color: var(--navy-soft); font-weight: 700; font-size: .95rem; }
.site-nav a:hover, .site-nav a.active { background: #fff; box-shadow: 0 8px 24px rgba(22,33,62,.08); color: var(--navy); }
.nav-toggle { display: none; border: 0; background: var(--navy); color: #fff; border-radius: 12px; padding: 8px 12px; }
.hero, .page-hero, .section, .split-section, .contact-card { max-width: 1180px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr); align-items: center; gap: 42px; padding-top: 72px; padding-bottom: 58px; }
.page-hero { padding-top: 66px; padding-bottom: 32px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .65fr); gap: 36px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 999px; background: #fff; color: var(--navy); font-weight: 800; box-shadow: 0 10px 28px rgba(22,33,62,.08); }
.eyebrow::before { content: ''; width: 9px; height: 9px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 6px rgba(242,140,56,.15); }
h1, h2, h3 { color: var(--navy); line-height: 1.22; margin: 0; }
h1 { font-size: clamp(2.15rem, 5vw, 4.35rem); letter-spacing: -.05em; margin-top: 20px; }
h2 { font-size: clamp(1.75rem, 3vw, 2.55rem); letter-spacing: -.035em; }
h3 { font-size: 1.18rem; }
p { margin: .75rem 0 0; color: var(--muted); }
.lead { font-size: 1.12rem; max-width: 760px; color: #44516a; }
.hero-actions, .inline-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 18px; border-radius: 999px; border: 1px solid var(--line); font-weight: 850; transition: transform .2s ease, box-shadow .2s ease; }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-primary { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-soft { background: #fff; color: var(--navy); }
.notice { display: flex; gap: 12px; align-items: flex-start; background: rgba(255,255,255,.82); border: 1px solid var(--line); border-radius: 20px; padding: 14px 16px; margin-top: 24px; }
.notice strong { color: var(--navy); }
.hero-card, .visual-card { background: rgba(255,255,255,.74); border: 1px solid rgba(22,33,62,.1); border-radius: 34px; box-shadow: var(--shadow); padding: 18px; overflow: hidden; }
.visual-card img { width: 100%; border-radius: 22px; }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.metric { border-radius: 18px; background: #fff; border: 1px solid var(--line); padding: 14px; }
.metric b { display: block; color: var(--navy); font-size: 1.45rem; }
.metric span { color: var(--muted); font-size: .88rem; }
.section { padding-top: 56px; padding-bottom: 42px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 24px; }
.section-head p { max-width: 680px; }
.grid { display: grid; gap: 18px; }
.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: rgba(255,255,255,.86); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: 0 14px 36px rgba(22,33,62,.07); }
.card:hover { border-color: rgba(141,124,246,.28); }
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.pill, .tag { display: inline-flex; align-items: center; gap: 5px; border-radius: 999px; padding: 5px 10px; background: var(--purple-soft); color: var(--navy); font-weight: 800; font-size: .82rem; }
.tag.orange { background: var(--orange-soft); }
.tag.green { background: rgba(65,184,131,.15); }
.card-img { border-radius: 18px; overflow: hidden; margin-bottom: 14px; background: var(--cream); border: 1px solid var(--line); }
.card-img img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.interact { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; color: #526078; font-size: .92rem; }
.interact span, .mini-btn { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 6px 10px; }
.mini-btn { cursor: pointer; color: var(--navy); font-weight: 750; }
.topic-list { display: grid; gap: 12px; }
.topic-row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 12px; padding: 14px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.topic-rank { width: 34px; height: 34px; border-radius: 12px; background: var(--navy); color: #fff; display: grid; place-items: center; font-weight: 900; }
.topic-row small { color: var(--muted); }
.avatar-row { display: flex; align-items: center; gap: 10px; }
.avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--purple), var(--orange)); display: grid; place-items: center; color: #fff; font-weight: 900; border: 3px solid #fff; box-shadow: 0 8px 18px rgba(22,33,62,.12); flex: 0 0 auto; }
.comment { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 18px; }
.comment::before { content: ''; position: absolute; left: 24px; top: -8px; width: 16px; height: 16px; background: #fff; border-left: 1px solid var(--line); border-top: 1px solid var(--line); transform: rotate(45deg); }
.stars { color: #f5a623; letter-spacing: 1px; font-weight: 900; }
.split-section { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 28px; align-items: center; padding-top: 54px; padding-bottom: 46px; }
.check-list { list-style: none; margin: 20px 0 0; padding: 0; display: grid; gap: 12px; }
.check-list li { background: rgba(255,255,255,.78); border: 1px solid var(--line); padding: 13px 15px; border-radius: 16px; color: #47536a; }
.check-list li::before { content: '✓'; display: inline-grid; place-items: center; width: 24px; height: 24px; margin-right: 8px; border-radius: 50%; background: rgba(65,184,131,.16); color: var(--green); font-weight: 900; }
.faq { display: grid; gap: 14px; }
details { background: rgba(255,255,255,.88); border: 1px solid var(--line); border-radius: 20px; padding: 16px 18px; }
summary { cursor: pointer; font-weight: 900; color: var(--navy); }
.form-box { display: grid; gap: 12px; }
.form-box label { color: var(--navy); font-weight: 800; }
.form-box input, .form-box textarea, .form-box select { width: 100%; border: 1px solid var(--line); background: #fff; border-radius: 16px; padding: 12px 14px; color: var(--ink); }
.form-box textarea { min-height: 132px; resize: vertical; }
.site-footer { margin-top: 46px; background: var(--navy); color: #fff; padding: 42px 20px 24px; }
.site-footer p { color: rgba(255,255,255,.72); }
.footer-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1.1fr 1fr .8fr; gap: 22px; }
.footer-bottom { max-width: 1180px; margin: 26px auto 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.14); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: rgba(255,255,255,.78); }
@media (max-width: 920px) {
    .hero, .page-hero, .split-section { grid-template-columns: 1fr; }
    .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    .topbar { align-items: flex-start; }
    .nav-toggle { display: inline-flex; }
    .site-nav { position: absolute; left: 16px; right: 16px; top: 72px; padding: 14px; background: rgba(255,255,255,.96); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); display: none; }
    .site-nav.open { display: grid; grid-template-columns: 1fr 1fr; }
    .hero, .page-hero, .section, .split-section { padding-left: 16px; padding-right: 16px; }
    .grid-2, .grid-3, .grid-4, .metric-row { grid-template-columns: 1fr; }
    .topic-row { grid-template-columns: auto 1fr; }
    .topic-row .tag { grid-column: 2; justify-self: start; }
}