:root{--yc-main: #fe5722;--yc-main-dark: #e04a1b;--yc-main-soft: #fff1ec;--yc-edit-bg: #ffffff;--yc-preview-bg: #f9f9f9;--yc-bar: #272727;--yc-divider: #cecece;--yc-menu-click: #efefef;--yc-disabled: #d5d5d5;--yc-tab-unselected: #acacac;--yc-tab-text: #333333;--yc-text: #1d1d1d;--yc-text-sub: #8d8d8d;--yc-track-music: #ffd119;--yc-track-text: #6ed3f8;--yc-track-effect: #a395ff;--yc-track-pip: #96e375;--yc-track-sticker: #78e5bf;--yc-track-record: #feb922;--yc-radius: 6px;--yc-rail: 84px;--yc-ctrl-h: 44px;--yc-tools-h: 92px;--yc-track-h: 34px;--yc-video-track-h: 56px;--yc-font: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, 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.mark{width:30px;height:30px;border-radius:8px;background:var(--yc-main);color:#fff;display:grid;place-items:center}.home-body{flex:1;overflow:auto;padding:40px 24px 60px}.home-inner{max-width:1080px;margin:0 auto}.hero{display:flex;gap:20px;align-items:stretch;margin-bottom:44px;flex-wrap:wrap}.hero-card{flex:1 1 320px;min-height:190px;border-radius:14px;padding:26px;display:flex;flex-direction:column;justify-content:space-between;background:var(--yc-main);color:#fff;cursor:pointer;transition:transform .14s ease,box-shadow .14s ease;box-shadow:0 6px 20px #fe572238}.hero-card:hover{transform:translateY(-2px);box-shadow:0 10px 28px #fe57224d}.hero-card.alt{background:#fff;color:var(--yc-text);border:1px solid #e6e6e6;box-shadow:none}.hero-card.alt:hover{border-color:var(--yc-main);box-shadow:0 8px 22px #0000000f}.hero-card h2{margin:0;font-size:24px}.hero-card p{margin:6px 0 0;opacity:.85;font-size:14px;line-height:1.5}.section-title{font-size:15px;font-weight:700;margin:0 0 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ease}.icon-btn:hover{background:var(--yc-menu-click);color:var(--yc-text)}.icon-btn.active{color:var(--yc-main)}.icon-btn:disabled{color:var(--yc-disabled);cursor:default;background:none}.empty{color:var(--yc-text-sub);font-size:13px;padding:28px;text-align:center;border:1px dashed #e0e0e0;border-radius:12px}.editor{height:100%;display:flex;flex-direction:column;background:var(--yc-preview-bg);overflow:hidden}.topbar{height:52px;flex:0 0 52px;display:flex;align-items:center;gap:8px;padding:0 12px 0 8px;background:#fff;border-bottom:1px solid #ececec;z-index:5}.topbar .title{font-size:14px;font-weight:600;padding:5px 8px;border-radius:6px;min-width:60px;border:1px solid transparent;background:transparent;outline:none;max-width:260px}.topbar .title:hover{border-color:#e4e4e4}.topbar .title:focus{border-color:var(--yc-main)}.spacer{flex:1}.btn{height:32px;padding:0 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18px;display:flex;gap:10px;justify-content:flex-end}.progress{height:5px;border-radius:3px;background:#eee;overflow:hidden}.progress>i{display:block;height:100%;background:var(--yc-main);transition:width .18s ease}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%);background:#272727f0;color:#fff;padding:10px 18px;border-radius:20px;font-size:13px;font-weight:500;z-index:80;pointer-events:none}