:root{--green:#68bb60;--green-dark:#3c8f48;--mint:#eaf7e8;--ink:#20242a;--muted:#7c838b;--line:#e6e9e7;--cream:#fff9d9;--danger:#d75c5c;--shadow:0 14px 40px rgba(30,44,32,.1);font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,sans-serif;color:var(--ink);background:#fafcf9;font-size:16px}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.boot{min-height:100vh;display:grid;place-content:center;text-align:center;color:var(--green-dark)}.logo-mark{display:grid;place-items:center;width:52px;height:52px;margin:auto;border-radius:15px;background:var(--green);color:#fff;font:700 30px Georgia}.topbar{height:66px;display:flex;align-items:center;justify-content:space-between;padding:0 max(22px,calc((100vw - 1160px)/2));position:sticky;top:0;z-index:20;background:#fffffff0;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}.brand{display:flex;align-items:center;gap:10px;font-weight:800}.brand .logo-mark{width:34px;height:34px;border-radius:10px;font-size:20px;margin:0}.nav{display:flex;gap:6px;align-items:center}.nav button,.ghost{border:0;background:transparent;padding:10px 13px;border-radius:10px;color:#4b5259}.nav button:hover,.nav button.active,.ghost:hover{background:var(--mint);color:var(--green-dark)}.primary{border:0;border-radius:12px;background:var(--green);color:#fff;padding:11px 18px;font-weight:700;box-shadow:0 7px 18px #68bb6038}.primary:hover{background:#58aa52}.shell{max-width:1160px;margin:auto;padding:30px 22px 100px}.hero{min-height:540px;display:grid;grid-template-columns:1.06fr .94fr;align-items:center;gap:55px;padding:54px 0}.eyebrow{color:var(--green-dark);font-weight:800;letter-spacing:.12em;text-transform:uppercase;font-size:.82rem}.hero h1{font-size:clamp(2.6rem,5vw,5rem);line-height:1.04;letter-spacing:-.055em;margin:16px 0 24px}.hero h1 em{font-style:normal;color:var(--green)}.lead{font-size:1.15rem;color:#616970;line-height:1.8;max-width:36rem}.hero-actions{display:flex;gap:12px;margin:30px 0}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:42px}.stat strong{font-size:1.65rem;display:block}.stat span{color:var(--muted);font-size:.85rem}.hero-visual{position:relative}.hero-card{border-radius:30px;overflow:hidden;background:#fff;box-shadow:var(--shadow);transform:rotate(1.5deg);border:8px solid #fff}.hero-card img{display:block;width:100%;aspect-ratio:4/5;object-fit:cover}.hero-caption{padding:20px 22px}.hero-caption strong{display:block;font-size:1.15rem}.hero-caption small{color:var(--green-dark)}.float-chip{position:absolute;left:-28px;top:18%;background:#fff;padding:13px 18px;border-radius:14px;box-shadow:var(--shadow);font-weight:700}.section{padding:68px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}.section h2{font-size:clamp(2rem,4vw,3.2rem);letter-spacing:-.04em;margin:0}.muted{color:var(--muted)}.feature-grid,.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature{background:#fff;border:1px solid var(--line);padding:24px;border-radius:18px}.feature b{display:block;margin-bottom:7px}.feature .icon{font-size:1.6rem;margin-bottom:18px}.steps{grid-template-columns:repeat(5,1fr)}.step{padding:22px;border-top:3px solid var(--green);background:#fff}.step i{font-style:normal;color:var(--green);font-weight:800;font-size:1.4rem}.step b{display:block;margin:14px 0 8px}.catalog-tools{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}.search{flex:1;min-width:220px;border:1px solid var(--line);border-radius:12px;padding:12px 15px;background:#fff}.select{border:1px solid var(--line);border-radius:12px;padding:12px 34px 12px 13px;background:#fff}.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.video-card{background:#fff;border:1px solid var(--line);border-radius:17px;overflow:hidden;transition:.2s}.video-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}.thumb{position:relative;aspect-ratio:16/10;background:#dde5dc;overflow:hidden}.thumb img{width:100%;height:100%;object-fit:cover;display:block}.duration{position:absolute;right:9px;bottom:9px;background:#0f1210c7;color:#fff;border-radius:6px;padding:3px 7px;font-size:.78rem}.demo-badge{position:absolute;left:9px;top:9px;background:var(--green);color:#fff;border-radius:8px;padding:5px 8px;font-size:.75rem}.video-card .body{padding:15px}.video-card h3{font-size:1rem;margin:0 0 11px;line-height:1.45}.meta{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:.78rem}.pill{background:#f1f5f1;padding:4px 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.subtitle-list{height:auto;max-height:70vh}.reading-panel{max-height:78vh}.reading-list{min-height:300px}.reading-tabs{height:62px;flex-basis:62px}.reading-card footer{align-items:flex-start;flex-direction:column}}.library-topbar{height:92px;position:relative;padding:0 max(24px,calc((100vw - 1600px)/2));background:#fbfdf9;border-color:#e7eee7}.sv-brand{display:flex;align-items:center;gap:12px;border:0;background:transparent;color:#142b51;text-align:left}.sv-brand>span:last-child{display:grid;line-height:1}.sv-brand b{font-size:28px;letter-spacing:.02em}.sv-brand small{font-size:11px;letter-spacing:.42em;font-weight:900;margin:4px 0 0 3px}.sv-play{position:relative;display:grid;place-items:center;width:46px;height:42px;border-radius:18px 18px 18px 5px;background:#08c976;color:#fff;font-size:16px}.sv-play i{position:absolute;right:-7px;bottom:-2px;width:21px;height:18px;border-radius:10px 10px 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