:root{color-scheme:dark;--bg:#0a0a0f;--surface:#171720;--soft:#232238;--text:#f5f5f8;--muted:#b0adbf;--border:#303040;--accent:#a69aff;--button:#7059e7;--radius:20px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans SC','Microsoft YaHei',sans-serif;line-height:1.6}body::before{content:'';position:fixed;inset:0;pointer-events:none;background:radial-gradient(800px 430px at 15% 0%,#6366f11b,transparent 65%);z-index:-1}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default}a{color:inherit}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}#main,#understand,#speak{scroll-margin-top:180px}
.skip-link{position:absolute;inset-inline-start:16px;top:-80px;background:var(--surface);padding:12px;z-index:30}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:5;background:#0a0a0fec;backdrop-filter:blur(18px);border-bottom:1px solid var(--border)}.header-inner,.wrap{width:min(100% - 40px,960px);margin:auto}.header-top{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 0}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:20px;font-weight:750;letter-spacing:-.5px}.brand-icon{display:grid;place-items:center;width:36px;height:36px;background:var(--button);border-radius:11px;font-size:19px}.brand-name{direction:ltr;unicode-bidi:isolate}.language-label{display:flex;align-items:center;gap:8px}.language-label select{border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--text);padding:8px 12px;max-width:180px;min-height:44px;font-size:14px}.site-nav{display:flex;gap:8px;flex-wrap:wrap;padding-bottom:12px}.site-nav a{display:flex;align-items:center;min-height:44px;padding:8px 14px;border-radius:11px;color:var(--muted);text-decoration:none;font-size:14px}.site-nav a[aria-current=page]{color:var(--accent);background:var(--soft);font-weight:650}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.hero{padding:42px 0 28px;max-width:760px}.eyebrow{color:var(--accent);font-size:12px;letter-spacing:1.8px;font-weight:650;margin:0 0 10px}.hero h1{font-size:clamp(29px,5vw,46px);line-height:1.18;letter-spacing:-1.1px;font-weight:760;margin:0 0 18px;text-wrap:balance}.hero p{font-size:17px;color:var(--muted);margin:0;max-width:690px}.section-heading{font-size:23px;line-height:1.3;margin:30px 0 16px}.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.story-card{display:grid;grid-template-columns:140px 1fr;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.story-visual{position:relative;display:flex;align-items:center;justify-content:center;background:var(--soft);border-inline-end:1px solid var(--border);min-height:272px}.story-visual img{width:100%;height:100%;object-fit:contain}.story-copy{padding:24px;display:flex;flex-direction:column;align-items:flex-start;gap:10px}.story-copy h2{font-size:22px;line-height:1.3;margin:0;text-wrap:balance}.story-copy p{font-size:14px;color:var(--muted);margin:0}.story-copy .eyebrow{color:var(--accent);font-size:11px;margin:0}.story-copy .watch-button{margin-top:auto}.duration{position:absolute;bottom:12px;inset-inline-end:10px;background:#0a0a0fee;border:1px solid var(--border);color:var(--text);border-radius:6px;padding:2px 7px;font-size:12px;direction:ltr;unicode-bidi:isolate;font-variant-numeric:tabular-nums}.watch-button{display:inline-flex;align-items:center;gap:9px;padding:10px 14px;min-height:44px;border:0;border-radius:11px;background:var(--soft);color:var(--accent);font-size:14px;font-weight:600}.watch-button:hover{background:#302b4c}.play-icon{font-size:16px;direction:ltr;unicode-bidi:isolate}.path{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:12px;margin:32px 0;color:var(--muted);font-size:14px}.path-arrow{color:var(--accent);font-size:16px}html[dir=rtl] .path-arrow{transform:scaleX(-1)}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:24px 0 30px}.principle{border-inline-start:2px solid var(--border);padding-inline-start:16px}.principle h3{font-size:16px;margin:0 0 6px}.principle p{font-size:14px;color:var(--muted);margin:0}.cta{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:12px;margin:30px 0 15px}.primary-link,.secondary-link{display:inline-flex;align-items:center;justify-content:center;min-height:48px;text-align:center;padding:12px 22px;border-radius:12px;text-decoration:none;font-weight:650;font-size:15px}.primary-link{background:var(--button);color:#fff}.primary-link:hover{background:#806bef}.secondary-link{background:var(--soft);color:var(--text)}.suitable{max-width:650px;text-align:center;margin:0 auto 30px;font-size:13px;color:var(--muted)}
.filters{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:12px}.filters button{padding:9px 14px;min-height:44px;background:var(--surface);border:1px solid var(--border);border-radius:11px;color:var(--muted);font-size:14px}.filters button[aria-pressed=true]{background:var(--soft);color:var(--accent);border-color:var(--accent)}.filter-status{margin:0 0 18px;font-size:13px;color:var(--muted)}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}.feature-card{display:flex;flex-direction:column;min-width:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.feature-poster{position:relative;display:flex;justify-content:center;height:176px;background:var(--soft);border-bottom:1px solid var(--border);overflow:hidden}.feature-poster img{height:100%;width:auto;max-width:100%;object-fit:contain}.feature-body{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:20px;flex:1}.feature-body h2{font-size:19px;line-height:1.3;margin:0;overflow-wrap:anywhere}.feature-en{font-size:11px;color:var(--muted);margin:0;direction:ltr;unicode-bidi:isolate}.feature-note{font-size:14px;color:var(--muted);margin:0 0 6px;flex:1}.feature-body .watch-button{margin-top:auto}.video-language-note{font-size:13px;color:var(--muted);margin:24px 0}.start-panel{display:grid;grid-template-columns:1fr 1.4fr;gap:24px;padding:26px;background:var(--soft);border-radius:var(--radius);margin:30px 0}.start-panel h2{font-size:22px;line-height:1.3;margin:0 0 10px}.start-panel p,.start-panel ol{color:var(--muted);font-size:14px;margin:0}.start-panel ol{padding-inline-start:22px;display:grid;gap:10px}.extra-help{padding:18px 0;border-top:1px solid var(--border)}.extra-help summary{cursor:pointer;font-weight:600;min-height:44px;display:flex;align-items:center;gap:9px}.extra-help summary::before{content:'+';color:var(--accent);font-size:20px}.extra-help[open] summary::before{content:'−'}.extra-help ul{margin:8px 0 12px;padding-inline-start:22px;color:var(--muted);font-size:14px}.extra-help li{margin:10px 0}.extra-help a{color:var(--accent)}.site-footer{margin-top:38px;border-top:1px solid var(--border);padding:24px 0 calc(24px + env(safe-area-inset-bottom));display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:12px}.footer-links{display:flex;flex-wrap:wrap;gap:8px 15px}.footer-links a{text-decoration:none}.footer-links a:hover{text-decoration:underline}.page-loading{padding:40px 0;color:var(--muted)}
.video-dialog{width:min(860px,calc(100% - 28px));max-height:92dvh;padding:22px;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:22px;overflow:auto}.video-dialog::backdrop{background:#000b;backdrop-filter:blur(5px)}.dialog-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px}.dialog-header h2{font-size:23px;line-height:1.3;margin:4px 0}.dialog-close{min-height:44px;flex-shrink:0;background:var(--soft);border:0;color:var(--text);border-radius:10px;padding:8px 14px}.dialog-layout{display:grid;grid-template-columns:minmax(0,310px) 1fr;gap:26px;align-items:center}.video-dialog video{display:block;direction:ltr;max-width:100%;width:100%;max-height:68dvh;aspect-ratio:9/16;background:#000;border-radius:12px;object-fit:contain}.dialog-copy p{font-size:15px;color:var(--muted);margin:0 0 20px}.dialog-error{color:#fecaca!important}.retry-button{min-height:44px;background:var(--soft);color:var(--accent);border:1px solid var(--border);border-radius:10px;padding:9px 14px;margin-bottom:16px}.dialog-error[hidden]{display:none}.dialog-actions{display:flex;flex-wrap:wrap;gap:10px}.dialog-copy .video-language-note{font-size:12px;margin-top:20px}.dialog-open{overflow:hidden}
@media(max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr)}.story-card{grid-template-columns:115px 1fr}.story-copy{padding:18px}.story-copy h2{font-size:20px}}
@media(max-width:640px){.header-inner,.wrap{width:calc(100% - 28px)}.header-top{padding:12px 0;gap:8px}.brand{font-size:18px;gap:8px}.language-label select{max-width:143px;font-size:16px;padding:6px 8px}.site-nav{gap:5px;padding-bottom:9px}.site-nav a{font-size:13px;padding:8px 10px}.hero{padding:28px 0 24px}.hero h1{letter-spacing:-.6px}.hero p{font-size:15px}.story-grid{grid-template-columns:1fr;gap:16px}.story-card{grid-template-columns:110px 1fr}.story-visual{min-height:230px}.story-copy{gap:9px}.story-copy p{font-size:13px}.principles{grid-template-columns:1fr;gap:18px}.feature-grid{grid-template-columns:1fr;gap:18px}.feature-card{display:grid;grid-template-columns:105px 1fr}.feature-poster{height:auto;min-height:215px;border-bottom:0;border-inline-end:1px solid var(--border);align-items:center}.feature-poster img{width:100%;height:auto}.feature-body{padding:18px}.feature-body h2{font-size:18px}.feature-note{font-size:13px}.filters{gap:7px}.filters button{font-size:13px;padding:8px 11px}.start-panel{grid-template-columns:1fr;padding:20px;gap:18px}.start-panel h2{font-size:20px}.video-dialog{padding:16px;border-radius:17px}.dialog-layout{grid-template-columns:1fr;gap:18px}.dialog-header h2{font-size:19px}.video-dialog video{max-height:55dvh;width:auto;max-width:100%;margin:auto}.dialog-copy p{font-size:14px;margin-bottom:16px}.dialog-copy .video-language-note{margin-top:14px}.dialog-actions .primary-link,.dialog-actions .secondary-link{padding:10px 14px;font-size:14px}.path{gap:8px;font-size:13px}}
@media(max-width:360px){.header-top{flex-wrap:wrap}.story-card,.feature-card{grid-template-columns:88px 1fr}.story-copy,.feature-body{padding:15px}.feature-body h2,.story-copy h2{font-size:17px}.watch-button{padding:9px 11px}.duration{inset-inline-end:6px;bottom:7px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}