:root{
    --blue:#dff4ff;
    --blue-deep:#4c9ec8;
    --cream:#fff4c9;
    --orange:#ffb45f;
    --orange-soft:#ffe0b8;
    --text:#243041;
    --muted:#64748b;
    --white:#ffffff;
    --line:#e7eef7;
    --shadow:0 18px 50px rgba(47,92,128,.13);
    --radius:28px;
}
*{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",Arial,sans-serif;color:var(--text);background:#fffaf0;line-height:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{width:min(1160px,92vw);margin:0 auto}.narrow{width:min(880px,92vw)}
.skip-link{position:absolute;top:-80px;left:16px;background:var(--text);color:white;padding:10px 14px;border-radius:12px;z-index:100}.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.84);backdrop-filter:blur(18px);border-bottom:1px solid rgba(231,238,247,.8)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:76px}.brand,.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.03em}.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:16px;background:linear-gradient(135deg,var(--orange),#ffd989);color:white;box-shadow:0 10px 24px rgba(255,180,95,.28)}.brand-text{font-size:1.28rem}.main-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.main-nav a{padding:10px 14px;border-radius:999px;color:#45556f;font-weight:700;font-size:.95rem}.main-nav a:hover,.main-nav a.active{background:var(--blue);color:#1d6f9b}.nav-toggle{display:none;border:0;background:var(--blue);border-radius:999px;padding:10px 16px;font-weight:800;color:#1d6f9b}
.hero{padding:72px 0 54px;background:radial-gradient(circle at 12% 10%,#fff 0,#fff7d8 36%,#e9f8ff 100%)}.hero-grid,.split{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}.hero h1,.page-hero h1{font-size:clamp(2.1rem,5vw,4.6rem);line-height:1.12;margin:10px 0 18px;color:#1e3148}.hero-text,.section-head p,.page-hero p{font-size:1.08rem;color:#526174}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 8px;color:#2d7fa8;font-weight:900;letter-spacing:.08em}.eyebrow:before{content:"";width:24px;height:8px;border-radius:999px;background:var(--orange)}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:999px;font-weight:900;border:0;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.btn:hover{transform:translateY(-2px)}.btn.primary{background:linear-gradient(135deg,#ffae55,#ffd789);color:#683b00;box-shadow:0 12px 24px rgba(255,174,85,.25)}.btn.secondary{background:#fff;color:#1e6689;border:1px solid #cfefff}.trust-pills,.tag-cloud{display:flex;gap:10px;flex-wrap:wrap}.trust-pills span,.tag-cloud span,.badge{background:#fff;border:1px solid var(--line);box-shadow:0 8px 20px rgba(47,92,128,.06);padding:7px 12px;border-radius:999px;color:#34657d;font-size:.92rem;font-weight:800}.hero-art,.image-card,.feedback-panel,.strip-card,.domain-card,.notice-card{background:rgba(255,255,255,.75);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.card-lift{transform:rotate(1.2deg)}
.section{padding:74px 0}.soft-blue{background:#eef9ff}.warm-bg{background:#fff3d8}.section-head{text-align:center;width:min(760px,100%);margin:0 auto 34px}.section h2{font-size:clamp(1.7rem,3vw,2.6rem);line-height:1.2;margin:0 0 16px;color:#1f334b}.section h3{margin:10px 0 8px;font-size:1.22rem}.cards{display:grid;gap:22px}.cards.three{grid-template-columns:repeat(3,1fr)}.cards.four{grid-template-columns:repeat(4,1fr)}.info-card,.feature-card,.mini-card,.playlist-card,.video-card{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:0 12px 34px rgba(47,92,128,.08);padding:24px}.feature-card img{height:176px;object-fit:contain;margin-bottom:12px}.mini-card{padding:20px}.mini-card h3{color:#266e95}.check-list{padding:0;margin:18px 0 0;list-style:none}.check-list li{position:relative;margin:10px 0;padding-left:30px}.check-list li:before{content:"✓";position:absolute;left:0;top:0;color:#2d8d6e;font-weight:900}.reverse{grid-template-columns:.95fr 1.05fr}.step-list{display:grid;gap:14px;margin-top:20px}.step-list div,.age-list article,.timeline article{display:grid;gap:4px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 8px 22px rgba(47,92,128,.07)}.step-list strong,.age-list strong{color:#266e95}.weekly-section{background:linear-gradient(135deg,#fff 0,#fff6dc 50%,#ecf9ff 100%)}.video-card{padding:0;overflow:hidden}.video-card img{width:100%;height:190px;object-fit:cover}.video-body{padding:20px}.feedback-panel blockquote{margin:18px 0 0;font-size:1.1rem;color:#43536b}.faq-list{display:grid;gap:14px;width:min(900px,100%);margin:0 auto}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px 22px;box-shadow:0 8px 24px rgba(47,92,128,.06)}.faq-list summary{cursor:pointer;font-weight:900;color:#263a53}.contact-strip{padding-top:30px}.strip-card{display:flex;align-items:center;justify-content:space-between;gap:20px;background:linear-gradient(135deg,#ffffff,#eaf9ff)}.text-link{font-weight:900;color:#1f7da7;border-bottom:2px solid var(--orange)}
.page-hero{padding:70px 0;text-align:center}.page-hero h1{font-size:clamp(2rem,4vw,3.6rem)}.playlist-card ul{margin:12px 0 0;padding-left:18px;color:var(--muted)}.timeline{display:grid;gap:18px}.timeline article{grid-template-columns:auto 1fr;column-gap:18px;align-items:start}.timeline span{grid-row:1/3;display:grid;place-items:center;width:48px;height:48px;border-radius:16px;background:var(--orange-soft);font-weight:900;color:#8a4d00}.age-list{display:grid;gap:12px;margin-top:18px}.tag-cloud{justify-content:center}.notice-card{margin-top:20px;background:#f5fbff}.notice-card.peach{background:#fff7e8}.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.domain-card{font-weight:900;color:#1c6d95;word-break:break-all}.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.contact-form label{display:block;margin:14px 0 6px;font-weight:900}.contact-form input,.contact-form select,.contact-form textarea{width:100%;border:1px solid #dbe8f2;border-radius:16px;padding:13px 14px;font:inherit;background:#fbfdff}.contact-form textarea{resize:vertical}.form-note{font-size:.9rem;color:var(--muted)}.small-art{margin-top:18px}.site-footer{background:#243041;color:#eaf2ff;padding:56px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr .6fr .6fr;gap:32px}.footer-grid h2{font-size:1rem;margin:0 0 10px;color:#fff}.footer-grid a{display:block;color:#d8e8f5;margin:8px 0}.footer-brand{font-size:1.35rem;color:#fff}.site-footer p{color:#c8d6e4}.domain-line{word-break:break-all}.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;color:#b8c7d7;font-size:.94rem}
@media (max-width:980px){.hero-grid,.split,.reverse{grid-template-columns:1fr}.cards.three,.cards.four,.video-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.card-lift{transform:none}.nav-toggle{display:inline-flex}.main-nav{display:none;position:absolute;left:4vw;right:4vw;top:76px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)}.main-nav.open{display:grid;grid-template-columns:1fr 1fr}.main-nav a{display:block;text-align:center}}
@media (max-width:640px){.hero,.section,.page-hero{padding:46px 0}.cards.three,.cards.four,.video-grid,.footer-grid{grid-template-columns:1fr}.hero-actions,.strip-card{align-items:stretch;flex-direction:column}.btn{width:100%}.main-nav.open{grid-template-columns:1fr}.brand-text{font-size:1.08rem}.hero h1,.page-hero h1{font-size:2.05rem}.video-card img{height:170px}.footer-bottom{display:grid}}