:root{
    --blue:#7ec8e3;
    --blue-dark:#3187a7;
    --cream:#fff4cf;
    --orange:#ffb46b;
    --orange-soft:#ffe2bf;
    --white:#ffffff;
    --text:#263646;
    --muted:#67788a;
    --line:#e9f0f4;
    --shadow:0 18px 45px rgba(49,135,167,.16);
    --radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#f8fdff 0%,#fff 48%,#fff8e4 100%);line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1160px,calc(100% - 36px));margin:0 auto}
.section{padding:76px 0}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-shell{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:78px}
.brand,.footer-logo{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--blue-dark)}
.brand-mark{width:42px;height:42px;border-radius:16px;background:linear-gradient(135deg,var(--orange),var(--cream));display:inline-flex;align-items:center;justify-content:center;box-shadow:0 10px 25px rgba(255,180,107,.28);color:#7a4a10;font-weight:900}
.brand-text{font-size:22px;letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.main-nav a{padding:10px 14px;border-radius:999px;color:#415567;font-weight:600}
.main-nav a:hover,.main-nav a.is-active{background:#e9f8ff;color:var(--blue-dark)}
.menu-toggle{display:none;border:0;background:#e9f8ff;border-radius:14px;padding:9px 12px;font-size:22px;color:var(--blue-dark)}
.domain-strip{border-top:1px solid #eef6fa;background:linear-gradient(90deg,#f2fbff,#fff7df)}
.domain-inner{display:flex;align-items:center;gap:12px;padding:10px 0;color:var(--muted);font-size:14px;flex-wrap:wrap}
.domain-inner strong{color:#2c7d99;background:#fff;border:1px solid #ddf0f7;border-radius:999px;padding:3px 10px}
.hero{padding:88px 0 78px;background:radial-gradient(circle at top left,#dbf5ff 0,transparent 32%),radial-gradient(circle at 82% 18%,#ffe9bd 0,transparent 30%)}
.hero-grid,.two-col{display:grid;grid-template-columns:1.04fr .96fr;gap:48px;align-items:center}
.reverse{grid-template-columns:.96fr 1.04fr}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue-dark);background:#e9f8ff;border:1px solid #d9f0fa;border-radius:999px;padding:7px 14px;font-size:14px;font-weight:700;margin-bottom:16px}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(36px,5vw,58px);line-height:1.12;margin-bottom:22px;letter-spacing:-1px}
h2{font-size:clamp(25px,3vw,38px);line-height:1.22;margin-bottom:14px}
h3{font-size:22px;line-height:1.3;margin-bottom:10px}
p{color:var(--muted);margin-bottom:18px}
.hero-copy p{font-size:18px;max-width:650px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:30px 0}
.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;transition:.2s ease}
.btn.primary{background:linear-gradient(135deg,var(--blue),#57b6d5);color:#fff;box-shadow:0 12px 28px rgba(49,135,167,.24)}
.btn.soft{background:#fff4d6;color:#8b5a12;border:1px solid #ffe2a5}
.btn:hover{transform:translateY(-2px)}
.hero-notes{display:flex;gap:12px;flex-wrap:wrap;color:#4d6677;font-weight:700}
.hero-notes span{background:#fff;border:1px solid var(--line);border-radius:16px;padding:8px 12px;box-shadow:0 8px 18px rgba(49,135,167,.08)}
.card-lift,.rounded-img{border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;overflow:hidden}
.section-head{text-align:center;max-width:780px;margin:0 auto 38px}
.age-grid,.content-grid,.values-grid,.safety-cards,.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.age-card,.content-card,.guide-card,.sample-card,.values-grid article,.safety-cards article,.video-card,.playlist-board,.question-box,.cta-box,.quote-panel,.domain-card,.contact-side,.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 34px rgba(49,135,167,.10)}
.age-card{padding:28px;text-align:center}
.age-card img{margin:0 auto 20px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:16px}
.tag,.pill{display:inline-flex;border-radius:999px;padding:6px 11px;background:#fff3d0;color:#80510f;font-size:13px;font-weight:800}
.feature-section{background:#fff}
.check-list{padding:0;margin:22px 0;list-style:none;display:grid;gap:12px}
.check-list li{position:relative;padding-left:32px;color:#506679}
.check-list li::before{content:"✓";position:absolute;left:0;top:0;width:23px;height:23px;border-radius:50%;background:#e5f7ff;color:var(--blue-dark);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:13px}
.text-link{color:var(--blue-dark);font-weight:900}
.soft-bg{background:linear-gradient(180deg,#f2fbff,#fff9e8)}
.content-card{overflow:hidden}
.content-body{padding:22px}
.content-card img,.video-thumb img{width:100%}
.guide-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:24px;align-items:stretch}
.guide-grid.three{grid-template-columns:repeat(3,1fr)}
.guide-card{padding:30px}
.guide-card.big{background:linear-gradient(135deg,#e9f8ff,#fff7df)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:28px}
.steps div{background:#fff;border-radius:20px;padding:16px;display:grid;gap:6px}
.steps strong,.guide-card>strong{color:var(--orange);font-size:22px}
.info-list{display:grid;gap:14px;margin-top:22px}
.info-list div{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px}
.info-list strong{display:block;color:var(--blue-dark);margin-bottom:6px}
.info-list p{margin:0}
.weekly-board{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;background:#fff;border-radius:32px;padding:18px;box-shadow:var(--shadow)}
.weekly-board article{padding:24px;border-radius:24px;background:linear-gradient(180deg,#f6fcff,#fff8df)}
.weekly-board span{font-weight:900;color:var(--blue-dark)}
.sample-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:24px}
.sample-card{padding:24px;text-align:center}
.quote-panel{padding:28px;text-align:center;background:linear-gradient(135deg,#fff4d4,#ecf9ff)}
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
details{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px 22px;box-shadow:0 10px 28px rgba(49,135,167,.08)}
summary{font-weight:900;cursor:pointer;color:#30495d}
details p{margin:14px 0 0}
.cta-box{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:34px;background:linear-gradient(135deg,#eaf9ff,#fff3cd)}
.compact-hero{background:linear-gradient(135deg,#f2fbff,#fff8e2)}
.values-grid article,.safety-cards article{padding:28px}
.story-panel{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:30px;background:#fff;border-radius:32px;padding:34px;box-shadow:var(--shadow)}
.story-panel img{justify-self:center}
.timeline{display:grid;gap:16px;max-width:860px}
.timeline article{background:#fff;border-left:6px solid var(--orange);border-radius:22px;padding:22px;box-shadow:0 10px 28px rgba(49,135,167,.08)}
.playlist-board{padding:28px}
.playlist-row{display:flex;justify-content:space-between;gap:16px;align-items:center;border-top:1px solid var(--line);padding:18px 0}
.playlist-row:first-of-type{border-top:0}
.age-table-wrap{overflow:auto;border-radius:26px;box-shadow:var(--shadow)}
.age-table{width:100%;border-collapse:collapse;background:#fff;min-width:760px}
.age-table th,.age-table td{padding:18px;border-bottom:1px solid var(--line);text-align:left}
.age-table th{background:#e9f8ff;color:#2c7d99}
.question-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:20px}
.question-grid span{background:#f6fcff;border:1px solid #dff2fa;border-radius:18px;padding:16px;text-align:center;font-weight:700}
.video-card{overflow:hidden}
.video-thumb{position:relative}.video-thumb span{position:absolute;right:14px;bottom:14px;background:rgba(38,54,70,.78);color:#fff;border-radius:999px;padding:5px 10px;font-weight:800}
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:start}
.contact-form{padding:28px;display:grid;gap:16px}
.contact-form label{display:grid;gap:8px;font-weight:800;color:#30495d}
.contact-form input,.contact-form textarea,.contact-form select{width:100%;border:1px solid #dbe9ef;border-radius:16px;padding:13px 14px;font:inherit;background:#fbfeff;color:var(--text)}
.form-note{font-size:14px;margin:0}.contact-side{padding:28px}.domain-card{padding:20px;margin-top:20px}.domain-card span{display:block;color:var(--muted);font-size:14px}.domain-card strong{display:block;color:var(--blue-dark);word-break:break-all}
.site-footer{background:#213444;color:#ecf7fb;margin-top:40px}
.site-footer p,.site-footer a{color:#cfe1e8}.footer-grid{display:grid;grid-template-columns:1.4fr .7fr .7fr 1fr;gap:30px;padding:54px 0}.site-footer h3{color:#fff;font-size:18px}.site-footer a{display:block;margin:8px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;color:#cfe1e8}.update-date{font-weight:900;color:#fff!important}
@media (max-width:920px){.menu-toggle{display:inline-flex}.main-nav{display:none;position:absolute;left:18px;right:18px;top:78px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)}.main-nav.is-open{display:grid}.main-nav a{padding:12px 14px}.hero-grid,.two-col,.reverse,.story-panel,.contact-grid{grid-template-columns:1fr}.guide-grid,.guide-grid.three,.age-grid,.content-grid,.values-grid,.safety-cards,.video-grid,.weekly-board,.sample-grid,.question-grid,.footer-grid{grid-template-columns:1fr 1fr}.cta-box{align-items:flex-start;flex-direction:column}.steps{grid-template-columns:1fr}}
@media (max-width:620px){.section{padding:52px 0}.container{width:min(100% - 24px,1160px)}.hero{padding:62px 0}h1{font-size:34px}.hero-actions{display:grid}.btn{width:100%}.age-grid,.content-grid,.values-grid,.safety-cards,.video-grid,.weekly-board,.sample-grid,.question-grid,.footer-grid{grid-template-columns:1fr}.domain-inner{font-size:13px}.playlist-row{display:grid}.nav-shell{min-height:68px}.main-nav{top:68px}.brand-text{font-size:19px}}