:root {
    --blue: #7cc8ef;
    --blue-deep: #2f79a8;
    --cream: #fff2bd;
    --orange: #ffad6b;
    --orange-soft: #ffe1c8;
    --white: #ffffff;
    --ink: #243445;
    --muted: #607285;
    --line: #dceefa;
    --green: #9fd8bd;
    --shadow: 0 18px 50px rgba(47, 121, 168, .14);
    --radius-xl: 34px;
    --radius-lg: 24px;
    --radius-md: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #f8fcff 0%, #fffaf0 50%, #f5fbff 100%);
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }
.topline { height: 8px; background: linear-gradient(90deg, var(--blue), var(--cream), var(--orange)); }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(124,200,239,.25);
}
.nav-wrap {
    max-width: 1180px;
    margin: 0 auto;
    padding: 14px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 22px; color: var(--blue-deep); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { padding: 9px 14px; border-radius: 999px; color: var(--muted); font-weight: 650; }
.main-nav a:hover, .main-nav a.active { background: #edf8ff; color: var(--blue-deep); }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 16px; background: #edf8ff; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--blue-deep); margin: 5px auto; border-radius: 2px; }
.section-pad { max-width: 1180px; margin: 0 auto; padding: 76px 22px; }
.hero { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 48px; min-height: 640px; }
.eyebrow { color: var(--orange); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 10px; }
h1, h2, h3 { line-height: 1.22; margin: 0; }
h1 { font-size: clamp(38px, 5vw, 68px); letter-spacing: -1.8px; }
h2 { font-size: clamp(28px, 3.5vw, 44px); letter-spacing: -1px; }
h3 { font-size: 22px; }
p { margin: 12px 0 0; color: var(--muted); }
.lead { font-size: 20px; max-width: 680px; color: #4e6174; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 22px; border-radius: 999px; font-weight: 800; border: 0; cursor: pointer; }
.btn.primary { background: linear-gradient(135deg, var(--blue), #8fd8ff); color: #0f4667; box-shadow: var(--shadow); }
.btn.soft { background: var(--cream); color: #7b5d12; }
.hero-tags, .tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.hero-tags span, .tag-cloud span, .pill, .contact-chip {
    display: inline-flex; align-items: center; border-radius: 999px; padding: 7px 13px; background: #fff; border: 1px solid var(--line); color: var(--blue-deep); font-weight: 700; font-size: 14px;
}
.hero-art { background: radial-gradient(circle at 20% 20%, #fff8d9, transparent 35%), #eef9ff; border-radius: 48px; padding: 22px; box-shadow: var(--shadow); }
.section-heading { text-align: center; max-width: 820px; margin: 0 auto 34px; }
.section-heading.narrow { max-width: 700px; }
.card-grid { display: grid; gap: 22px; }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.card-grid.four { grid-template-columns: repeat(4, 1fr); }
.info-card, .content-card, .mini-card, .video-card, .value-grid article, .age-lanes article, .contact-card {
    background: rgba(255,255,255,.88);
    border: 1px solid rgba(124,200,239,.28);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 14px 36px rgba(47,121,168,.08);
}
.info-card img { height: 150px; margin: 0 auto 18px; }
.info-card .pill, .content-card .pill { margin-top: 14px; }
.split-soft { background: linear-gradient(135deg, rgba(238,249,255,.9), rgba(255,246,211,.76)); border-radius: var(--radius-xl); }
.list-panel { display: grid; gap: 16px; max-width: 940px; margin: 0 auto; }
.list-panel.wide { max-width: 1180px; }
.list-panel article { display: grid; grid-template-columns: 220px 1fr; gap: 16px; align-items: center; padding: 20px 24px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md); }
.list-panel strong { color: var(--blue-deep); font-size: 20px; }
.list-panel span { color: var(--muted); }
.split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.split-layout.reverse { grid-template-columns: .92fr 1.08fr; }
.rounded-art { border-radius: var(--radius-xl); box-shadow: var(--shadow); background: #fff; }
.check-list { padding: 0; margin: 22px 0 0; list-style: none; display: grid; gap: 12px; }
.check-list li { padding-left: 34px; position: relative; color: var(--muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue-deep); font-weight: 900; background: #eaf8ff; width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; }
.guide-band { background: linear-gradient(135deg, #fff7d5, #eef9ff); border-radius: var(--radius-xl); }
.guide-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.guide-steps div { background: #fff; border-radius: var(--radius-lg); padding: 24px; border: 1px solid var(--line); }
.guide-steps span, .value-grid span { display: inline-grid; place-items: center; width: 44px; height: 44px; background: var(--orange-soft); color: #9a521e; border-radius: 16px; font-weight: 900; margin-bottom: 14px; }
.feature-row { margin-top: 14px; display: flex; gap: 10px; align-items: flex-start; color: var(--muted); }
.feature-row span { color: var(--blue-deep); font-weight: 900; }
.weekly { display: grid; grid-template-columns: 1.2fr .8fr; gap: 28px; align-items: center; background: #fff; border-radius: var(--radius-xl); box-shadow: var(--shadow); }
.weekly img { max-height: 300px; margin: 0 auto; }
.content-card img { border-radius: 20px; background: #f1faff; margin-bottom: 18px; }
.feedback-wrap { background: linear-gradient(135deg, rgba(255,255,255,.8), rgba(255,225,200,.58)); border-radius: var(--radius-xl); }
.feedback-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.feedback-grid figure { margin: 0; background: #fff; padding: 24px; border-radius: var(--radius-lg); border: 1px solid var(--line); }
.feedback-grid img { width: 72px; height: 72px; margin-bottom: 12px; }
blockquote { margin: 0; font-size: 19px; color: #3d5266; }
figcaption { margin-top: 12px; color: var(--blue-deep); font-weight: 800; }
.faq-list { max-width: 900px; margin: 0 auto; display: grid; gap: 14px; }
details { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md); padding: 18px 22px; }
summary { cursor: pointer; font-weight: 800; color: var(--ink); }
.contact-cta { display: flex; justify-content: space-between; align-items: center; gap: 20px; background: linear-gradient(135deg, #e9f8ff, #fff4ce); border-radius: var(--radius-xl); }
.domain-line { color: var(--muted); }
.domain-line span { color: var(--blue-deep); font-weight: 900; word-break: break-all; }
.domain-line.big { font-size: 18px; }
.page-hero { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: center; }
.page-hero.compact { min-height: 390px; }
.page-hero img { max-height: 300px; margin-left: auto; background: #fff; border-radius: var(--radius-xl); box-shadow: var(--shadow); }
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.promise-panel { text-align: center; background: #fff; border-radius: var(--radius-xl); border: 1px solid var(--line); box-shadow: var(--shadow); }
.responsive-table { overflow-x: auto; background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { padding: 16px 18px; text-align: left; border-bottom: 1px solid #eaf3fa; }
th { background: #eff9ff; color: var(--blue-deep); }
tr:last-child td { border-bottom: 0; }
.age-lanes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.age-badge { display: inline-flex; background: var(--cream); color: #7b5d12; padding: 7px 14px; border-radius: 999px; font-weight: 900; margin-bottom: 16px; }
.age-lanes ul { color: var(--muted); padding-left: 20px; }
.notice-box { margin-top: 18px; padding: 18px; background: #fff7d5; border-radius: var(--radius-md); color: #7b5d12; font-weight: 700; }
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.video-thumb { position: relative; border-radius: 22px; overflow: hidden; background: #eff9ff; margin-bottom: 16px; }
.play-dot { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 58px; height: 58px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,255,255,.88); color: var(--blue-deep); font-weight: 900; box-shadow: 0 8px 22px rgba(36,52,69,.12); }
.contact-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 28px; align-items: start; }
.contact-form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-xl); padding: 28px; box-shadow: var(--shadow); display: grid; gap: 18px; }
.contact-form label { display: grid; gap: 8px; font-weight: 800; color: var(--ink); }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; border: 1px solid #cfe5f3; border-radius: 16px; padding: 13px 14px; background: #f8fcff; color: var(--ink); }
.form-note { font-size: 14px; }
.contact-chip { margin: 10px 8px 0 0; }
.site-footer { margin-top: 60px; background: #20394d; color: #eef8ff; }
.footer-grid { max-width: 1180px; margin: 0 auto; padding: 48px 22px; display: grid; grid-template-columns: 1.3fr .7fr .7fr 1fr; gap: 28px; }
.site-footer p, .site-footer a { color: #c9deec; }
.site-footer h2 { font-size: 18px; margin-bottom: 12px; color: #fff; }
.site-footer a { display: block; margin: 8px 0; }
.footer-brand { color: #fff; margin-bottom: 12px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 18px 22px; text-align: center; }
.footer-bottom p { margin: 0; }
@media (max-width: 980px) {
    .nav-toggle { display: block; }
    .main-nav { position: absolute; right: 22px; top: 76px; width: min(320px, calc(100vw - 44px)); background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: 14px; box-shadow: var(--shadow); display: none; flex-direction: column; align-items: stretch; }
    .main-nav.open { display: flex; }
    .hero, .page-hero, .split-layout, .split-layout.reverse, .weekly, .contact-layout { grid-template-columns: 1fr; }
    .hero { min-height: auto; }
    .card-grid.three, .card-grid.four, .value-grid, .age-lanes, .video-grid, .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .page-hero img { margin: 0; }
}
@media (max-width: 640px) {
    .section-pad { padding: 52px 16px; }
    .nav-wrap { padding: 12px 16px; }
    .brand { font-size: 19px; }
    h1 { font-size: 38px; }
    h2 { font-size: 29px; }
    .lead { font-size: 18px; }
    .card-grid.three, .card-grid.four, .guide-steps, .feedback-grid, .value-grid, .age-lanes, .video-grid, .footer-grid { grid-template-columns: 1fr; }
    .list-panel article { grid-template-columns: 1fr; }
    .contact-cta { align-items: flex-start; flex-direction: column; }
    .hero-art { border-radius: 28px; }
}