:root{--font-family:"PingFang SC",sans-serif;--ink:#153d36;--text:#243b36;--muted:#77877f;--green:#167258;--line:#e1e8e2;--paper:#f6f8f5;--mint:#e8f1e7;--red:#b33428}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:155px}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.6 var(--font-family);-webkit-tap-highlight-color:transparent}body:has(dialog[open]){overflow:hidden}button,input,select{font:inherit}button,a,input,select{outline-offset:4px}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}a{color:inherit;text-decoration:none}button{color:inherit}svg{display:block}img{max-width:100%}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;top:-70px;left:16px;z-index:100;background:var(--ink);color:white;padding:12px 20px}.skip-link:focus{top:10px}
.site-header{max-width:1168px;margin:auto;padding:24px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;gap:12px;align-items:center;font-size:17px;font-weight:600;letter-spacing:.5px;line-height:1.4}.brand img{background:#fff;object-fit:contain;border-radius:4px;padding:2px}.brand small{display:block;font-size:11px;font-weight:400;color:var(--muted);margin-top:3px;letter-spacing:1.2px}.header-tag{font-size:12px;letter-spacing:2px;color:#53766a;border:1px solid #cddfd2;border-radius:30px;padding:5px 13px}.quiet-button{border:0;background:transparent;color:var(--muted);font-size:13px;min-height:44px;padding:8px}.page{max-width:1168px;margin:auto;padding:0 24px 120px}.hero{position:relative;border-radius:18px;overflow:hidden;background:#e8f1e7;padding:35px 38px 0;border:1px solid #dce8dc}.hero-copy{position:relative;z-index:1}.eyebrow{font-size:11px;letter-spacing:1.8px;color:#6b8b76;margin:0 0 12px}.eyebrow span{display:inline-block;width:6px;height:6px;vertical-align:middle;border-radius:50%;background:#467c5d;margin-right:3px}.hero h1{font-size:36px;line-height:1.35;letter-spacing:1px;font-weight:600;color:var(--ink);margin:0}.hero h1 span{margin-left:10px}.hero-description{font-size:14px;color:#668271;line-height:1.85;margin:13px 0 20px}.mobile-break{display:none}.hero-counts{display:flex;align-items:center;gap:20px;font-size:12px;color:#698371;margin-bottom:28px}.hero-counts strong{font-size:25px;font-weight:500;color:#254d3d;font-variant-numeric:tabular-nums;margin-right:4px}.hero-counts i{height:21px;width:1px;background:#bdd1be}.hero-footer{position:relative;z-index:1;border-top:1px solid #cbdecb;display:flex;justify-content:space-between;gap:10px;font-size:11px;color:#72907a;padding:12px 0;letter-spacing:1px}.hero-mark{position:absolute;right:100px;top:10px;width:250px;height:240px;display:grid;place-items:center;color:#497d5f}.orbit{position:absolute;border:1px solid #aac6ae;border-radius:50%;opacity:.45;width:220px;height:220px}.orbit-two{width:280px;height:280px}.play-disc{width:120px;height:120px;border-radius:50%;border:1px solid #fafff8;background:#f3f8edc9;display:grid;place-items:center;box-shadow:0 15px 35px #b0cab160}.play-disc svg{width:58px;height:58px}.mark-cross{font-size:29px;position:absolute;right:3px;top:15px;color:#8eb394;font-weight:200}.mark-dot{position:absolute;bottom:24px;left:2px;border:4px solid #e8f1e7;box-shadow:0 0 0 1px #afc9b0;width:15px;height:15px;border-radius:50%;background:#80a087}
.discovery{position:sticky;top:0;z-index:5;background:var(--paper);padding:27px 0 14px}.search-box{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:10px;background:white;padding:10px 15px;margin:0}.search-box svg{width:20px;height:20px;stroke:#849a8b;fill:none;stroke-width:1.7;flex-shrink:0}.search-box input{border:0;outline:0;background:transparent;min-width:0;width:100%;font-size:14px;line-height:26px;color:var(--ink)}.search-box:focus-within{outline:2px solid #569b7d;outline-offset:2px}.search-box input::placeholder{color:#98a59d}.topic-chips{display:flex;gap:8px;overflow-x:auto;padding:16px 1px 4px;scrollbar-width:none}.topic-chips::-webkit-scrollbar{display:none}.chip{white-space:nowrap;flex-shrink:0;min-height:40px;padding:7px 17px;border:1px solid var(--line);background:#fff;border-radius:24px;font-size:13px;color:#6e8074}.chip.active{color:#fff;background:var(--ink);border-color:var(--ink)}.chip:hover:not(.active){background:#eaf0e9}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:24px 0 17px}.section-heading h2{font-size:21px;line-height:1.5;font-weight:600;margin:0;letter-spacing:.5px}.section-heading .eyebrow{margin-bottom:4px}.section-note{font-size:12px;color:var(--muted);margin:4px 0 0}.sort-label select{background:transparent;border:0;min-height:44px;max-width:110px;color:#718477;font-size:12px;padding:6px 2px 6px 10px}.results-heading{margin-top:11px}.video-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px 18px}.video-card{min-width:0;background:#fff;border:1px solid #e5eae4;border-radius:12px;overflow:hidden;display:flex;flex-direction:column}.cover-button{position:relative;border:0;background:#dae4dd;display:block;padding:0;width:100%;aspect-ratio:16/10;overflow:hidden}.cover-button img{display:block;width:100%;height:100%;object-fit:cover;object-position:center}.cover-shade{position:absolute;inset:55% 0 0;background:linear-gradient(transparent,#142e3280)}.duration{position:absolute;bottom:9px;right:9px;color:white;font-size:10px;letter-spacing:.3px;font-variant-numeric:tabular-nums}.cover-play{position:absolute;left:10px;bottom:10px;display:grid;place-items:center;border:1px solid #ffffff9c;width:25px;height:25px;border-radius:50%;color:#fff;background:#163d3859}.cover-play svg{width:13px;height:13px}.video-body{padding:13px 13px 0;display:flex;flex-direction:column;flex:1}.video-kind{font-size:10px;color:#779681;margin-bottom:7px;letter-spacing:.5px}.video-title{border:0;background:transparent;text-align:left;padding:0;font-size:14px;font-weight:500;line-height:1.65;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere;color:#284239}.video-date{font-size:10px;color:#a0aca3;margin:10px 0 12px;font-variant-numeric:tabular-nums}.card-actions{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #eff2ed;margin-top:auto;min-height:44px}.card-watch{color:var(--green);font-size:12px;font-weight:500;padding:12px 0;min-height:44px;display:flex;align-items:center;gap:5px}.save-button{background:transparent;border:0;width:44px;height:44px;margin-right:-10px;display:grid;place-items:center;color:#9aaba0;flex-shrink:0}.save-button svg{width:18px;height:18px;stroke:currentColor;stroke-width:1.6;fill:none}.save-button.saved{color:var(--green)}.save-button.saved svg{fill:#e0eee2}.load-area{text-align:center;margin:24px 0 4px}.load-area p{font-size:11px;color:#97a59b;margin:0 0 14px}.outline-button{border:1px solid #d6e1d7;background:#fff;border-radius:8px;min-height:44px;padding:10px 25px;color:#52765f;font-size:13px}.outline-button span{margin-left:10px}.empty-state{padding:42px 15px;text-align:center;border:1px dashed #d4e0d3;border-radius:12px;margin-top:15px}.empty-symbol{font-size:45px;color:#abc0ac}.empty-state h3{font-size:17px;font-weight:500;margin:4px 0 10px}.empty-state p{font-size:13px;color:var(--muted);margin:0 0 22px}.page-footer{text-align:center;padding:27px 15px 10px;color:#99a89c;font-size:11px}.page-footer>span{color:#728b77;letter-spacing:1px}.page-footer p{line-height:1.9;margin:12px 0 8px}.page-footer small{font-size:10px}
.topic-section{margin:32px 0 12px}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.topic-card{display:flex;flex-direction:column;align-items:flex-start;text-align:left;border:1px solid #dfe8de;border-radius:12px;background:#fff;padding:19px 17px;min-height:150px;gap:6px}.topic-number{font-size:11px;letter-spacing:2px;color:#9daf9b}.topic-card strong{font-size:15px;font-weight:500;line-height:1.4;margin-top:6px}.topic-card p{font-size:11px;color:#94a18f;margin:0}.topic-card>span:last-child{font-size:11px;color:var(--green);margin-top:auto;padding-top:12px}.topic-card:hover{background:#edf4e9}.bottom-nav{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);z-index:10;display:flex;width:min(450px,calc(100% - 32px));background:#fffffff5;border:1px solid #e2e9e0;box-shadow:0 5px 30px #294d3514;border-radius:15px;padding:6px 14px}.nav-item{background:transparent;border:0;min-height:55px;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:#99a89b;font-size:10px;letter-spacing:.4px}.nav-item svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7}.nav-item.active{color:var(--green)}.nav-item.active svg{fill:#e7f0e5}.nav-item small{font-size:9px;border-radius:8px;background:#edf2ea;padding:0 5px;margin-left:2px;font-variant-numeric:tabular-nums}
.access-panel{max-width:420px;margin:13vh auto;padding:32px;border:1px solid var(--line);background:white;border-radius:16px}.access-panel h1{font-size:26px;margin:0 0 10px;font-weight:600;color:var(--ink)}.access-panel>p:not(.eyebrow){font-size:13px;color:var(--muted);margin-bottom:25px}.access-panel label{font-size:12px;display:block;color:var(--muted);margin:22px 0 8px}.access-panel input{width:100%;border:1px solid #cfdfd1;border-radius:8px;padding:12px;font-size:16px;color:var(--ink)}.solid-button{border:0;border-radius:9px;background:var(--ink);color:white;padding:13px 20px;min-height:48px;font-size:14px;text-align:center;display:inline-flex;align-items:center;justify-content:center;gap:10px}.access-panel .solid-button{width:100%}.form-error{color:var(--red);font-size:12px;min-height:18px}.loading-panel{text-align:center;border:0;background:transparent}.loading-dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:#7b9e7e;box-shadow:18px 0 #abc5a9,-18px 0 #d5e5d0}
dialog{border:0;padding:0;border-radius:18px;background:#fff;color:var(--text);max-height:88dvh;max-width:calc(100vw - 32px);width:700px;box-shadow:0 24px 90px #17332245;overflow:auto}dialog::backdrop{background:#172e297a;backdrop-filter:blur(3px)}.detail-heading{position:sticky;top:0;background:#fff;z-index:2;padding:19px 22px 12px;display:flex;justify-content:space-between;gap:20px;align-items:center;border-bottom:1px solid #edf1e9}.detail-heading>span{font-size:12px;color:#729379}.close-detail{border:0;background:#f0f4ee;width:36px;height:36px;border-radius:50%;font-size:22px;flex-shrink:0;line-height:1}.detail-image{display:block;background:#f1f4ef;border-bottom:1px solid #edf1e9}.detail-image img{display:block;width:100%;max-height:420px;object-fit:contain}.detail-body{padding:24px}.detail-body h2{font-size:21px;line-height:1.6;font-weight:600;margin:0 0 14px;overflow-wrap:anywhere}.detail-chips{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 23px}.detail-chips span{font-size:11px;background:#eef5e9;padding:3px 9px;border-radius:4px;color:#749064}.detail-meta{display:grid;grid-template-columns:90px 1fr;gap:10px;font-size:12px;margin:22px 0}.detail-meta dt{color:#9baa9b}.detail-meta dd{margin:0;overflow-wrap:anywhere;color:#536a5b}.detail-meta dd a{text-decoration:underline;text-underline-offset:3px}.detail-tip{font-size:12px;line-height:1.8;color:#8c9b8e;background:#f6f8f2;padding:12px 14px;border-radius:8px}.detail-warning{color:#a6662f;background:#fcf5e9}.detail-actions{position:sticky;bottom:0;display:flex;gap:12px;align-items:center;padding:14px 24px;background:#fffffff7;border-top:1px solid #e8efe3}.detail-actions .solid-button{flex:1}.detail-save{min-width:86px;background:#f2f6ee;border:1px solid #dce7d6;border-radius:9px;padding:12px 15px;font-size:13px;min-height:48px}.detail-save.saved{color:var(--green);background:#e8f3e3}.toast{position:fixed;bottom:110px;left:50%;transform:translateX(-50%);z-index:100;width:max-content;max-width:calc(100% - 40px);font-size:13px;line-height:1.6;background:#183b30;color:white;border-radius:9px;padding:12px 19px;box-shadow:0 8px 30px #17332220}
@media(min-width:1000px){.hero h1{font-size:40px}.hero-mark{right:160px}.hero-description{margin-bottom:14px}.topic-chips{gap:10px}.chip{flex:1;padding-inline:12px}}
@media(max-width:900px){.video-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-mark{right:45px;opacity:.8}.hero h1{font-size:31px}}
@media(max-width:620px){html{scroll-padding-top:140px}.site-header{padding:18px 20px 19px;gap:10px}.brand{font-size:15px;gap:9px}.brand img{width:35px;height:35px}.brand small{font-size:9px;letter-spacing:1px}.header-tag{font-size:10px;padding:4px 10px;letter-spacing:1px}.page{padding:0 18px calc(108px + env(safe-area-inset-bottom))}.hero{padding:24px 22px 0;border-radius:14px}.eyebrow{font-size:9px;letter-spacing:1.3px;margin-bottom:11px}.hero h1{font-size:28px;line-height:1.37;letter-spacing:.5px}.hero h1 span{display:block;margin:0}.hero-description{font-size:11px;line-height:1.9;margin:12px 0 16px;max-width:220px}.mobile-break{display:block}.hero-counts{font-size:10px;gap:15px;margin-bottom:19px}.hero-counts strong{font-size:23px}.hero-counts i{height:17px}.hero-mark{width:160px;height:160px;right:-12px;top:18px;opacity:.85}.orbit-one{width:134px;height:134px}.orbit-two{width:175px;height:175px}.play-disc{width:79px;height:79px}.play-disc svg{width:41px;height:41px}.mark-cross{top:0;right:31px;font-size:21px}.mark-dot{bottom:15px;left:17px;width:10px;height:10px;border-width:3px}.hero-footer{font-size:9px;letter-spacing:.3px;padding:10px 0}.discovery{padding:21px 0 10px}.search-box{padding:9px 12px;border-radius:8px;gap:9px}.search-box input{font-size:16px;line-height:25px}.search-box input::placeholder{font-size:12px}.search-box svg{width:17px;height:17px}.topic-chips{padding-top:14px;gap:7px;margin-right:-18px;padding-right:18px}.chip{font-size:11px;padding:7px 15px;min-height:40px}.section-heading{margin:15px 0 13px;gap:8px}.section-heading h2{font-size:19px}.section-note{font-size:10px;margin-top:3px}.sort-label select{font-size:10px}.video-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 12px}.video-card{border-radius:10px}.video-body{padding:11px 10px 0}.video-kind{font-size:9px;margin-bottom:6px}.video-title{font-size:13px;line-height:1.7}.video-date{font-size:9px;margin:9px 0 10px}.card-watch{font-size:10px;padding:10px 0}.duration{font-size:9px;right:7px;bottom:8px}.cover-play{width:22px;height:22px;left:8px;bottom:8px}.cover-play svg{width:11px;height:11px}.save-button{margin-right:-7px;width:38px;min-width:38px}.save-button svg{width:16px;height:16px}.load-area{margin-top:22px}.load-area p{font-size:10px}.load-area .outline-button{width:100%;max-width:260px;font-size:12px}.page-footer{padding:25px 0 6px;font-size:10px}.page-footer small{font-size:9px}.bottom-nav{bottom:0;width:100%;border-radius:17px 17px 0 0;padding:7px 24px calc(8px + env(safe-area-inset-bottom));border-bottom:0}.nav-item{min-height:50px;font-size:10px;gap:4px}.topic-section{margin:25px 0 0}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.topic-card{padding:16px 14px;min-height:142px}.topic-card strong{font-size:13px}.topic-card p{font-size:10px}.topic-card>span:last-child{font-size:10px}.access-panel{margin:12vh 20px;padding:27px}.access-panel h1{font-size:24px}dialog{max-width:100%;width:100%;margin:auto 0 0;max-height:92dvh;border-radius:19px 19px 0 0}.detail-heading{padding:13px 18px 10px}.detail-body{padding:19px}.detail-body h2{font-size:19px}.detail-meta{grid-template-columns:77px 1fr;font-size:11px}.detail-actions{padding:12px 18px calc(12px + env(safe-area-inset-bottom))}.detail-actions .solid-button{font-size:13px}.detail-save{font-size:12px;min-width:83px}.detail-tip{font-size:11px}.toast{bottom:calc(90px + env(safe-area-inset-bottom))}}
@media(max-width:359px){.page{padding-left:14px;padding-right:14px}.site-header{padding-inline:16px}.hero{padding-inline:18px}.hero h1{font-size:26px}.hero-mark{right:-30px;opacity:.55}.hero-description{font-size:10px}.hero-footer{font-size:8px}.video-grid{gap:12px 9px}.video-body{padding-inline:9px}.video-title{font-size:12px}.topic-chips{margin-right:-14px;padding-right:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}