:root{
  --bg:#F3FBFA; --bg-deep:#E4F4F1; --surface:#FFFFFF; --surface-2:#D4EFEC;
  --title:#0D2E2B; --text:#163834; --muted:#4A706C; --aux:#6A8E89;
  --brand:#0E9A88; --bright:#1EC8B6; --deep:#0A6B5E; --porcelain:#F7FFFE;
  --border:rgba(14,154,136,.16); --border-strong:rgba(14,154,136,.42);
  --shadow:0 12px 28px rgba(10,107,94,.08); --max:1120px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1{font-size:24px;line-height:1.3;color:var(--title);margin-bottom:14px}h2{font-size:20px;line-height:1.4;color:var(--title);margin-bottom:12px}h3{font-size:16px;line-height:1.45;color:var(--title);margin-bottom:8px}p{margin-bottom:14px}.topline{position:fixed;z-index:70;left:0;right:0;top:0;height:22px;background:var(--deep);color:#fff;font-size:12px}.topline-inner,.masthead-inner,.quick-tabs-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.topline-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.top-search{border:0;background:transparent;color:#fff;height:22px;padding:0 2px;cursor:pointer}.top-search:focus-visible{outline:2px solid #fff;outline-offset:1px}.masthead{position:fixed;z-index:69;left:0;right:0;top:22px;height:60px;background:#fff;border-bottom:1px solid var(--border)}.masthead-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.brand-link{justify-self:start;min-height:44px;display:flex;align-items:center}.brand-logo{height:28px;width:auto;object-fit:contain}.brand-text{font-size:16px;font-weight:700;color:var(--title)}.drawer-open{justify-self:center;min-width:76px;height:44px;border:1px solid var(--border-strong);border-radius:12px;background:var(--porcelain);color:var(--deep);font-weight:700;cursor:pointer}.app-link{justify-self:end;min-height:44px;display:inline-flex;align-items:center;padding:0 14px;border-radius:12px;background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%);color:#fff;font-size:14px;font-weight:700}.quick-tabs{position:fixed;z-index:68;left:0;right:0;top:82px;height:40px;background:var(--porcelain);border-bottom:1px solid var(--border)}.quick-tabs-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:10px}.quick-tabs a{height:30px;padding:0 14px;border-radius:9px;display:inline-flex;align-items:center;font-size:13px;color:var(--deep)}.quick-tabs a.is-active{background:var(--brand);color:#fff}.site-main{padding-top:122px;min-height:60vh}.page-shell{width:min(var(--max),calc(100% - 32px));margin:0 auto}.section-block{padding:42px 0}.split-soft{position:relative}.split-soft:before{content:"";position:absolute;z-index:-1;left:50%;right:50%;margin-left:-50vw;margin-right:-50vw;top:0;bottom:0;background:var(--bg-deep)}.inner-hero{padding:52px 0 24px}.inner-hero>p:last-child{max-width:820px;color:var(--muted);font-size:16px}.eyebrow{margin-bottom:8px;color:var(--brand);font-size:12px;font-weight:800;letter-spacing:.12em}.section-heading{max-width:760px;margin-bottom:22px}.section-heading>p:last-child{color:var(--muted)}.media-slot{display:flex;align-items:center;justify-content:center;background:var(--porcelain);border:1px solid var(--border);border-radius:14px;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.banner-slot{height:260px;border-radius:0 0 14px 14px}.wide-image{height:200px;margin-bottom:22px}.card-image{height:180px;margin-bottom:16px}.app-image{height:min(360px,55vw)}.icon-slot{width:48px;height:48px;border-radius:12px;flex:0 0 48px}.home-cover{padding:24px 0 36px}.cover-copy{padding:24px 0 0;max-width:820px}.cover-copy>p:not(.eyebrow){font-size:16px;color:var(--muted)}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border-radius:11px;font-size:14px;font-weight:700;white-space:nowrap;border:1px solid transparent}.btn-primary{color:#fff;background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%)}.btn-secondary{color:var(--deep);background:#fff;border-color:var(--border-strong)}.btn:hover,.text-link:hover,.footer-grid a:hover,.drawer-links a:hover{transform:translateY(-1px)}.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(30,200,182,.38);outline-offset:2px}.three-grid,.four-grid,.catalog-grid,.product-grid,.discovery-grid,.contact-grid,.method-grid,.help-grid,.steps-grid{display:grid;gap:16px}.three-grid{grid-template-columns:repeat(3,1fr)}.four-grid{grid-template-columns:repeat(4,1fr)}.catalog-grid,.product-grid,.discovery-grid,.contact-grid,.help-grid,.steps-grid{grid-template-columns:repeat(2,1fr)}.method-grid{grid-template-columns:repeat(2,1fr)}.feature-card,.compact-cards article,.catalog-grid article,.product-grid article,.discovery-grid article,.contact-grid article,.method-grid article,.help-grid article,.steps-grid article,.notebook-list article,.about-sections article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.feature-card p,.catalog-grid p,.product-grid p,.discovery-grid p,.contact-grid p,.help-grid p,.steps-grid p,.notebook-list p,.about-sections p{color:var(--muted)}.text-link{display:inline-flex;min-height:44px;align-items:center;color:var(--deep);font-weight:800}.number-list{display:grid;gap:12px;margin:18px 0}.four-cols{grid-template-columns:repeat(4,1fr)}.number-list article{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px}.number-list span,.big-number-list>article>span,.lesson-list>article>span,.method-grid>article>span,.steps-grid>article>span{color:var(--brand);font-size:22px;font-weight:900}.long-copy{max-width:900px;color:var(--text)}.shelf-list,.shelf-detailed,.daily-list,.record-list,.lesson-list,.notebook-list,.about-sections,.faq-full{display:grid;gap:12px}.shelf-list article{display:grid;grid-template-columns:180px 1fr auto;gap:18px;align-items:center;min-height:72px;padding:14px 16px;background:#fff;border:1px solid var(--border);border-radius:12px}.shelf-list b{color:var(--title)}.shelf-list span{color:var(--muted)}.shelf-list a{color:var(--deep);font-weight:800;min-height:44px;display:flex;align-items:center}.big-number-list{display:grid;gap:10px}.big-number-list article{display:grid;grid-template-columns:64px 1fr;gap:14px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px}.big-number-list article>span{font-size:28px}.big-number-list p{margin-bottom:0;color:var(--muted)}.big-number-list.detailed article{padding:20px}.big-number-list.detailed a{display:inline-flex;min-height:44px;align-items:center;font-weight:800;color:var(--deep)}.timeline{position:relative;display:grid;gap:0;margin-left:12px;padding-left:28px;border-left:2px solid var(--border-strong)}.timeline article{position:relative;padding:0 0 24px 10px}.timeline .dot{position:absolute;width:12px;height:12px;border-radius:50%;background:var(--brand);left:-35px;top:7px;box-shadow:0 0 0 4px var(--bg)}.timeline b{color:var(--deep)}.detailed-time h2{margin:6px 0}.compact-cards article{padding:16px}.app-layout{display:grid;grid-template-columns:minmax(260px,.8fr) 1.2fr;gap:28px;align-items:center}.app-copy p{color:var(--muted)}.app-title-row{display:flex;align-items:center;gap:12px;margin-bottom:14px}.app-title-row h2{margin:0}.faq-mini{display:grid;gap:10px}.faq-mini details{background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px 16px}.faq-mini summary{font-weight:800;color:var(--title);cursor:pointer}.faq-mini p{margin:10px 0 0;color:var(--muted)}.brand-statement{padding-bottom:58px}.daily-list article,.lesson-list article{display:grid;grid-template-columns:64px 1fr;gap:14px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px}.daily-list>article>span,.lesson-list>article>span{font-size:28px;font-weight:900;color:var(--brand)}.daily-list .note{padding:10px 12px;background:var(--porcelain);border-left:3px solid var(--brand);color:var(--deep);margin-bottom:0}.record-list article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px}.record-list p{color:var(--muted)}.shelf-detailed article{display:grid;grid-template-columns:70px 1fr;gap:16px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px}.shelf-no{width:52px;height:52px;display:flex;align-items:center;justify-content:center;border-radius:12px;background:var(--brand);color:#fff;font-weight:900}.shelf-detailed span{display:inline-block;color:var(--deep);font-weight:700}.legal-copy{max-width:860px}.legal-copy h2{margin-top:28px}.legal-copy p{color:var(--muted)}.discovery-grid article,.help-grid article{display:flex;flex-direction:column}.discovery-grid .text-link,.help-grid a{margin-top:auto;color:var(--deep);font-weight:800;min-height:44px;display:flex;align-items:center}.method-grid article,.steps-grid article{position:relative}.method-grid article>span,.steps-grid article>span{display:block;margin-bottom:8px}.faq-full article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:20px}.faq-full p{margin-bottom:0;color:var(--muted)}.site-footer{background:var(--deep);color:#D4EFEC;border-top:1px solid rgba(247,255,254,.34);padding:42px 0 calc(34px + env(safe-area-inset-bottom))}.footer-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.footer-brand{display:flex;align-items:center;gap:12px;padding-bottom:20px;border-bottom:1px solid rgba(247,255,254,.22)}.footer-logo{height:28px;width:auto;object-fit:contain}.footer-brand strong{display:block;color:#fff}.footer-brand span{display:block;font-size:12px}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:24px 0}.footer-grid h2{color:#fff;font-size:13px;margin-bottom:8px}.footer-grid a{display:block;min-height:32px;color:#D4EFEC;font-size:13px}.footer-note,.copyright{font-size:13px;color:#D4EFEC}.copyright{margin-bottom:0}.screen-overlay{position:fixed;z-index:80;inset:0;background:rgba(13,46,43,.46);visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.screen-overlay.is-visible{visibility:visible;opacity:1;pointer-events:auto}.drawer{position:fixed;z-index:90;left:50%;bottom:0;width:min(720px,100%);max-height:70vh;background:#fff;border-radius:18px 18px 0 0;box-shadow:0 -20px 60px rgba(13,46,43,.24);transform:translate(-50%,105%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s}.drawer.is-open{transform:translate(-50%,0);visibility:visible;pointer-events:auto}.drawer-head{height:64px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--border)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand img{height:28px;width:auto;object-fit:contain}.drawer-close,.search-head button{min-width:62px;height:40px;border:1px solid var(--border-strong);border-radius:10px;background:#fff;color:var(--deep);font-weight:700;cursor:pointer}.drawer-body{max-height:calc(70vh - 64px);overflow:auto;padding:16px 18px 24px}.drawer-body section+section{margin-top:20px}.drawer-body h2{font-size:13px;color:var(--brand);margin-bottom:8px}.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}.drawer-links a{display:block;border:1px solid var(--border);border-radius:12px;padding:10px 12px;background:var(--porcelain)}.drawer-links b{display:block;color:var(--title);font-size:14px}.drawer-links span{display:block;color:var(--muted);font-size:12px;line-height:1.5;margin-top:3px}.search-layer{position:fixed;z-index:91;left:0;right:0;top:82px;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(720px,calc(100% - 32px));margin:12px auto 0;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);padding:18px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-card>p{color:var(--muted);margin:8px 0 14px}.search-presets{display:flex;flex-wrap:wrap;gap:8px}.search-presets a{min-height:40px;display:inline-flex;align-items:center;padding:0 12px;border-radius:10px;border:1px solid var(--border);background:var(--porcelain);color:var(--deep);font-weight:700}.mobile-bar{display:none}.wide-app{grid-template-columns:minmax(240px,.72fr) 1.28fr}
@media (max-width:860px){.three-grid,.four-grid,.four-cols{grid-template-columns:repeat(2,1fr)}.app-layout{grid-template-columns:1fr}.app-image{height:340px}.shelf-list article{grid-template-columns:1fr;gap:6px}.catalog-grid,.product-grid,.discovery-grid,.contact-grid,.method-grid,.help-grid,.steps-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){body{padding-bottom:calc(48px + env(safe-area-inset-bottom))}.topline-inner,.masthead-inner,.page-shell,.footer-inner{width:calc(100% - 32px)}.quick-tabs{display:none}.site-main{padding-top:82px}.masthead-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px}.brand-logo{max-width:106px}.brand-text{font-size:16px}.drawer-open{min-width:64px;padding:0 10px}.app-link{padding:0 10px}.section-block{padding:32px 0}.inner-hero{padding:38px 0 18px}.home-cover{padding-top:16px}.banner-slot{height:260px}.three-grid,.four-grid,.four-cols{grid-template-columns:1fr}.wide-image{height:190px}.card-image{height:180px}.daily-list article,.lesson-list article,.big-number-list article{grid-template-columns:52px 1fr;padding:16px}.shelf-detailed article{grid-template-columns:56px 1fr;padding:16px}.shelf-no{width:44px;height:44px}.footer-grid{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.drawer{left:0;width:100%;max-height:78vh;transform:translate(0,105%)}.drawer.is-open{transform:translate(0,0)}.drawer-body{max-height:calc(78vh - 64px)}.drawer-links{grid-template-columns:1fr}.search-layer{inset:22px 0 0;top:22px;background:var(--deep);color:#fff}.search-card{width:100%;height:100%;margin:0;border:0;border-radius:0;background:var(--deep);color:#fff;padding:22px 16px}.search-head strong{color:#fff;font-size:20px}.search-head button{background:transparent;border-color:rgba(255,255,255,.5);color:#fff}.search-card>p{color:#D4EFEC}.search-presets{display:grid;grid-template-columns:1fr 1fr}.search-presets a{background:#fff;color:var(--deep);border-color:#fff}.mobile-bar{display:grid;position:fixed;z-index:75;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--border)}.mobile-bar a{display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--deep);min-height:48px}.mobile-bar a.is-active{background:var(--brand);color:#fff}.app-image{height:320px}.footer-note{line-height:1.8}}
@media (max-width:390px){.brand-logo{max-width:88px}.drawer-open{min-width:58px}.app-link{font-size:13px;padding:0 8px}.search-presets{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.banner-slot{height:230px}}