:root {
    --cream: #fff8ec;
    --cream-2: #fffdf7;
    --navy: #11224a;
    --navy-2: #1b356e;
    --orange: #ff8a3d;
    --orange-soft: #ffe1c8;
    --purple: #bba7ff;
    --purple-soft: #eee8ff;
    --ink: #1d2746;
    --muted: #66708c;
    --line: rgba(17, 34, 74, .12);
    --card: rgba(255, 255, 255, .82);
    --shadow: 0 20px 45px rgba(17, 34, 74, .12);
    --radius: 26px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(circle at 18% 12%, rgba(255, 138, 61, .18), transparent 28%),
        radial-gradient(circle at 84% 8%, rgba(187, 167, 255, .22), transparent 30%),
        linear-gradient(180deg, var(--cream), var(--cream-2) 42%, #f7f4ff 100%);
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(1180px, calc(100% - 36px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: rgba(255, 248, 236, .84);
    border-bottom: 1px solid var(--line);
}
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 900; letter-spacing: .01em; }
.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 18px;
    color: #fff;
    background: linear-gradient(135deg, var(--navy), var(--orange));
    box-shadow: 0 10px 24px rgba(255, 138, 61, .28);
}
.brand-text { color: var(--navy); font-size: 1.05rem; }
.main-nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.main-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--navy);
    font-weight: 700;
    font-size: .95rem;
}
.main-nav a:hover, .main-nav a.is-active { background: var(--navy); color: #fff; }
.menu-toggle { display: none; border: 0; background: var(--navy); color: #fff; border-radius: 14px; font-size: 1.3rem; padding: 9px 13px; }
.page-hero { padding: 76px 0 46px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(320px, .98fr); gap: 42px; align-items: center; }
.hero-copy h1 { margin: 0 0 18px; font-size: clamp(2.25rem, 5vw, 5.25rem); line-height: 1.05; color: var(--navy); letter-spacing: -.05em; }
.lead { margin: 0; font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--muted); max-width: 720px; }
.eyebrow { margin: 0 0 12px; color: var(--orange); font-weight: 900; letter-spacing: .12em; font-size: .82rem; text-transform: uppercase; }
.badge-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.badge-row span, .pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.72);
    color: var(--navy);
    border-radius: 999px;
    padding: 9px 14px;
    font-weight: 800;
}
.hero-visual { position: relative; }
.hero-visual img { border-radius: var(--radius); filter: drop-shadow(0 24px 35px rgba(17, 34, 74, .13)); }
.quick-panel {
    margin-top: 30px;
    padding: 18px;
    border-radius: 22px;
    background: var(--card);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.quick-panel strong { color: var(--navy); }
section { padding: 52px 0; }
.section-title { max-width: 760px; margin-bottom: 28px; }
.section-title h2 { margin: 0 0 12px; color: var(--navy); font-size: clamp(1.75rem, 3.2vw, 3rem); line-height: 1.16; letter-spacing: -.03em; }
.section-title p:last-child { margin: 0; color: var(--muted); }
.grid { display: grid; gap: 22px; }
.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: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 10px; color: var(--navy); font-size: 1.25rem; }
.card p { margin: 0 0 14px; color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
.media-card { overflow: hidden; padding: 0; }
.media-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.media-card .card-body { padding: 22px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; }
.tag-row span { background: var(--purple-soft); color: var(--navy); border-radius: 999px; padding: 6px 10px; font-size: .86rem; font-weight: 800; }
.meta-row { display: flex; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: .9rem; }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    cursor: pointer;
    border-radius: 999px;
    min-height: 46px;
    padding: 0 18px;
    font-weight: 900;
    background: var(--navy);
    color: #fff;
    box-shadow: 0 14px 28px rgba(17, 34, 74, .18);
}
.btn.secondary { background: #fff; color: var(--navy); border: 1px solid var(--line); box-shadow: none; }
.btn.ghost { background: var(--orange-soft); color: var(--navy); box-shadow: none; }
.btn:hover { transform: translateY(-1px); }
.btn.is-saved { background: var(--purple); color: var(--navy); }
.topic-card { position: relative; overflow: hidden; }
.topic-card::after {
    content: "";
    position: absolute;
    width: 160px;
    height: 160px;
    right: -62px;
    bottom: -62px;
    background: radial-gradient(circle, rgba(255,138,61,.24), transparent 70%);
}
.score { display: flex; align-items: baseline; gap: 8px; color: var(--orange); font-weight: 900; font-size: 2rem; }
.score small { color: var(--muted); font-size: .86rem; font-weight: 700; }
.stars { color: var(--orange); letter-spacing: 2px; font-size: 1.1rem; }
.note { font-size: .92rem; color: var(--muted); }
.timeline { display: grid; gap: 16px; }
.timeline-item { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 16px; align-items: start; }
.avatar {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--purple), var(--orange-soft));
    border: 3px solid #fff;
    box-shadow: 0 10px 20px rgba(17,34,74,.1);
}
.comment-bubble { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 18px; position: relative; }
.comment-bubble::before { content:""; position:absolute; left:-8px; top:20px; width:14px; height:14px; background:#fff; border-left:1px solid var(--line); border-bottom:1px solid var(--line); transform: rotate(45deg); }
.inline-list { margin: 14px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.inline-list li { padding-left: 26px; position: relative; color: var(--muted); }
.inline-list li::before { content: "✦"; position: absolute; left: 0; color: var(--orange); }
.feature-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}
.feature-strip .mini { background: rgba(255,255,255,.75); border: 1px solid var(--line); border-radius: 22px; padding: 18px; }
.mini strong { display:block; color: var(--navy); margin-bottom: 6px; }
.split { display: grid; grid-template-columns: .86fr 1.14fr; gap: 28px; align-items: start; }
.panel { background: var(--navy); color: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.panel p, .panel .note { color: rgba(255,255,255,.78); }
.panel h2, .panel h3 { color: #fff; }
.panel .pill { background: rgba(255,255,255,.11); color: #fff; border-color: rgba(255,255,255,.18); }
.faq { display: grid; gap: 14px; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px 20px; }
.faq summary { cursor: pointer; font-weight: 900; color: var(--navy); }
.faq p { color: var(--muted); }
.notice-box { border: 1px dashed rgba(255, 138, 61, .55); background: rgba(255, 225, 200, .42); border-radius: 22px; padding: 20px; }
.site-footer { padding: 48px 0; margin-top: 52px; background: var(--navy); color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.3fr .65fr 1fr; gap: 32px; align-items: start; }
.footer-brand .brand-mark { background: linear-gradient(135deg, #fff, var(--purple)); color: var(--navy); }
.footer-brand .brand-text, .site-footer h3 { color: #fff; }
.site-footer p, .site-footer a { color: rgba(255,255,255,.78); }
.site-footer a { display: block; margin: 8px 0; }
.host-line, .update-date { font-weight: 800; color: #fff !important; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: .1s; }
.delay-2 { transition-delay: .2s; }
@media (max-width: 980px) {
    .hero-grid, .split, .footer-grid { grid-template-columns: 1fr; }
    .grid-3, .grid-4, .feature-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .main-nav { position: absolute; left: 18px; right: 18px; top: 70px; background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 12px; box-shadow: var(--shadow); display: none; }
    .main-nav.is-open { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); }
    .menu-toggle { display: inline-flex; }
}
@media (max-width: 640px) {
    .container { width: min(100% - 26px, 1180px); }
    .page-hero { padding-top: 48px; }
    section { padding: 38px 0; }
    .grid-2, .grid-3, .grid-4, .feature-strip { grid-template-columns: 1fr; }
    .card { padding: 20px; }
    .main-nav.is-open { grid-template-columns: 1fr; }
    .timeline-item { grid-template-columns: 48px 1fr; }
    .avatar { width: 46px; height: 46px; border-radius: 15px; }
}