:root{--ink:#1d1d1f;--muted:#6e6e73;--paper:#f5f5f7;--white:#fff;--blue:#0071e3;--line:rgba(0,0,0,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:-.02em}button,input{font:inherit}
[hidden]{display:none!important}.eyebrow{margin:0 0 12px;color:#86868b;font-size:11px;font-weight:750;letter-spacing:.16em}.muted{color:var(--muted);line-height:1.6}.primary{width:100%;border:0;border-radius:13px;padding:13px 18px;background:var(--blue);color:#fff;font-weight:650;cursor:pointer}.secondary{border:1px solid #d2d2d7;border-radius:99px;padding:9px 16px;background:#fff;color:#333;cursor:pointer}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 70% 20%,#fff 0,#eef2f8 34%,transparent 58%),var(--paper)}.login-card{width:min(460px,100%);padding:48px;border:1px solid rgba(255,255,255,.8);border-radius:36px;background:rgba(255,255,255,.86);box-shadow:0 34px 90px rgba(28,43,65,.12);backdrop-filter:blur(20px)}.back-home{display:inline-block;margin-bottom:38px;color:#7a7a80;text-decoration:none}.brand-mark{display:grid;place-items:center;width:58px;height:58px;margin-bottom:28px;border-radius:18px;background:#121214;color:#fff;font-size:24px;font-weight:800}.login-card h1{margin:0;font-size:44px;letter-spacing:-.055em}.login-card form{display:grid;gap:16px;margin-top:28px}.login-card label{display:grid;gap:7px;font-size:13px;font-weight:650}.login-card input{width:100%;border:1px solid #d2d2d7;border-radius:12px;padding:13px;background:#fff;outline:none}.login-card input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(0,113,227,.12)}.error{min-height:20px;color:#d70015;font-size:13px}
.site-header{position:sticky;z-index:10;top:0;height:58px;padding:0 max(20px,calc((100vw - 1180px)/2));display:flex;align-items:center;background:rgba(250,250,252,.86);border-bottom:1px solid var(--line);backdrop-filter:saturate(180%) blur(22px)}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}.brand span{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:#1d1d1f;color:#fff;font-weight:750}.header-actions{margin-left:auto;display:flex;align-items:center;gap:14px;color:#555;font-size:13px}.header-actions button{border:0;background:none;color:var(--blue);cursor:pointer}
main{max-width:1180px;margin:0 auto;padding:28px 16px 90px}.hero{position:relative;min-height:330px;padding:64px;display:flex;align-items:center;overflow:hidden;border-radius:36px;background:linear-gradient(135deg,#09090b,#252932);color:#fff}.hero h1{margin:0;font-size:clamp(48px,7vw,76px);letter-spacing:-.065em}.hero p:last-child{max-width:600px;color:#b8bac1;font-size:18px;line-height:1.6}.live-orb{position:absolute;right:6%;width:250px;height:250px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle at 35% 28%,#ddebff,#74a5dc 42%,#234d7d 77%);box-shadow:0 0 100px rgba(100,158,224,.35)}.live-orb span{display:grid;place-items:center;width:88px;height:88px;padding-left:6px;border-radius:50%;background:rgba(255,255,255,.9);color:#315c8c;font-size:34px}
.library-panel{margin-top:18px;padding:42px;border-radius:30px;background:#fff;box-shadow:0 18px 60px rgba(0,0,0,.06)}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:18px}.panel-heading h2{margin:0;font-size:36px;letter-spacing:-.045em}.folder-hint{margin:10px 0 30px;color:var(--muted);font-size:14px}.file-tree{display:grid;gap:8px}.loading,.empty,.error-state{padding:36px;border-radius:18px;background:#f5f5f7;text-align:center;color:var(--muted)}.tree-row{min-width:0}.tree-item{width:100%;min-height:68px;padding:12px 16px;border:1px solid #e7e7e9;border-radius:16px;display:flex;align-items:center;gap:13px;background:#fff;text-align:left;cursor:pointer;transition:.18s}.tree-item:hover{border-color:#c8d8ea;background:#f8fbff;transform:translateY(-1px)}.tree-icon{flex:0 0 auto;width:43px;height:43px;display:grid;place-items:center;border-radius:12px;background:#eef4fb;color:#3e6f9f;font-size:20px}.tree-copy{min-width:0;flex:1}.tree-copy strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px}.tree-copy small{display:block;margin-top:5px;color:#8a8a90}.chevron{color:#8a8a90;font-size:24px;transition:.2s}.folder.open>.tree-item .chevron{transform:rotate(90deg)}.tree-children{display:grid;gap:8px;margin:8px 0 6px 28px;padding-left:16px;border-left:1px solid #dfe5ec}.video-badge{padding:5px 9px;border-radius:99px;background:#edf6ff;color:#1769b1;font-size:11px}.unsupported{cursor:default;opacity:.72}
dialog{width:min(1040px,calc(100% - 28px));padding:0;border:0;border-radius:28px;background:#121214;color:#fff;box-shadow:0 38px 110px rgba(0,0,0,.45)}dialog::backdrop{background:rgba(0,0,0,.65);backdrop-filter:blur(10px)}.player-head{padding:26px 30px;display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.player-head h2{margin:0;max-width:820px;font-size:24px}.player-head p:last-child{margin:7px 0 0;color:#8d8d93;font-size:12px}.player-head button{border:0;background:none;color:#aaa;font-size:34px;cursor:pointer}.video-shell{background:#000;aspect-ratio:16/9;display:grid;place-items:center}.video-shell video{width:100%;height:100%;background:#000}.player-note{margin:0;padding:17px 30px;color:#8d8d93;font-size:12px}
@media(max-width:700px){.login-card{padding:34px 24px;border-radius:28px}.login-card h1{font-size:37px}.header-actions #userName{display:none}main{padding:12px 10px 60px}.hero{min-height:270px;padding:34px 26px}.hero h1{font-size:47px}.live-orb{right:-80px;width:210px;height:210px;opacity:.5}.library-panel{padding:26px 16px;border-radius:24px}.panel-heading h2{font-size:30px}.tree-children{margin-left:14px;padding-left:9px}.tree-item{padding:10px}.tree-icon{width:38px;height:38px}.video-badge{display:none}.player-head{padding:20px}.player-head h2{font-size:19px}.player-note{padding:14px 20px}}