:root{--blue:#1677ff;--blue-hover:#409eff;--blue-active:#0958d9;--page:#f8fafd;--hero:#eef6ff;--ink:#10223d;--text:#334155;--muted:#64748b;--subtle:#94a3b8;--line:#edf2f7;--soft:#eaf3ff;--green:#22c55e}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--page);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;font-size:14px}button,input{font:inherit}button{cursor:pointer;border:0}.site-header{height:74px;background:#fff;border-bottom:1px solid #f1f5f9}.header-inner{width:calc(100% - 124px);max-width:1410px;height:100%;margin:0 auto;display:flex;align-items:center}.logo{width:190px;display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}.logo-icon{width:40px;height:40px;color:var(--blue)}.logo-icon svg{width:100%;height:100%}.logo-name{font-size:24px;font-weight:600;letter-spacing:-1px}.main-nav{height:100%;display:flex;gap:36px}.main-nav a{position:relative;height:100%;display:flex;align-items:center;color:var(--text);text-decoration:none;font-size:16px}.main-nav a.active{color:var(--blue);font-weight:500}.main-nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:6px;height:3px;border-radius:3px;background:var(--blue)}.account-area{margin-left:auto;display:flex;align-items:center;gap:10px;color:var(--text)}.icon-ghost{position:relative;width:28px;height:32px;margin-right:14px;padding:4px;background:transparent;color:#7f91a9}.icon-ghost svg{width:24px;height:24px}.icon-ghost i{position:absolute;top:2px;right:0;width:8px;height:8px;border-radius:50%;background:#ff6f6f;border:2px solid white}.avatar{width:36px;height:36px;display:grid;place-items:center;border-radius:50%;background:#d9ebff;color:var(--blue);font-weight:600;font-size:12px}.account-name{font-size:14px}.chevron{color:#8da0b5;font-size:18px}.hero{height:230px;background:var(--hero);overflow:hidden}.hero-inner{position:relative;width:calc(100% - 124px);max-width:1410px;height:100%;margin:0 auto;display:flex;align-items:flex-start}.hero-copy{padding-top:46px;z-index:1}.hero h1{margin:0;color:var(--ink);font-size:36px;line-height:50px;font-weight:600;letter-spacing:-1px}.hero-copy>p{margin:4px 0 0;color:var(--muted);font-size:18px;line-height:28px}.feature-row{display:flex;gap:40px;margin-top:28px}.feature{display:flex;align-items:center;gap:12px;min-width:150px}.feature+.feature{padding-left:28px;border-left:1px solid #d8e7f8}.feature-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:50%;background:#e3f0ff;color:var(--blue)}.feature-icon svg{width:22px;height:22px}.feature b,.feature small{display:block}.feature b{color:var(--text);font-size:14px;font-weight:500;line-height:20px}.feature small{color:var(--subtle);font-size:12px;line-height:20px}.hero-art{position:absolute;right:20px;top:0;width:520px;height:230px;opacity:.8}.cloud-art{position:absolute;right:166px;top:40px;width:160px;height:110px}.cloud-art svg{width:100%;height:100%}.orbit{position:absolute;border:1px solid #b9d7ff;border-radius:50%;transform:rotate(-12deg)}.orbit-a{right:30px;top:28px;width:340px;height:105px}.orbit-b{right:80px;top:92px;width:370px;height:90px}.art-file{position:absolute;display:grid;place-items:center;width:44px;height:44px;border-radius:8px;color:#fff;font-size:22px;font-weight:600}.art-image{right:357px;top:122px;background:#47c7a2}.art-video{right:72px;top:114px;background:#8278ea}.art-doc{right:160px;top:18px;background:#45c8b3}.content-grid{width:calc(100% - 124px);max-width:1410px;margin:20px auto 40px;display:grid;grid-template-columns:1.52fr 1fr;gap:14px;align-items:start}.card{background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 2px 8px rgba(15,23,42,.03)}.transfer-card{padding:20px 24px 24px;min-height:660px}.mode-tabs{height:42px;display:flex;gap:8px}.mode-tab{width:226px;height:42px;display:flex;justify-content:center;align-items:center;gap:8px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--muted);font-size:14px}.mode-tab svg{width:18px;height:18px}.mode-tab.active{border-color:#c9e0ff;background:var(--soft);color:var(--blue);font-weight:500}.dropzone{height:286px;margin-top:20px;display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px dashed #bbd8ff;border-radius:10px;background:#fbfdff;transition:.2s}.dropzone:hover,.dropzone:focus,.dropzone.active{border-color:var(--blue);background:#f5faff;outline:none}.dropzone input{display:none}.upload-cloud{width:64px;height:64px;margin-bottom:12px}.upload-cloud svg{width:100%;height:100%}.dropzone strong{color:var(--ink);font-size:18px;font-weight:500;line-height:28px}.dropzone>span:not(.upload-cloud){color:var(--subtle);font-size:14px;line-height:22px}.choose-button{width:162px;height:46px;margin-top:20px;border-radius:23px;background:var(--blue);color:#fff;font-size:14px;font-weight:500}.choose-button:hover,.start-button:hover{background:var(--blue-hover)}.selected-files{margin-top:16px;border:1px solid #e8eef5;border-radius:8px;overflow:hidden}.selected-head{height:44px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid #f1f5f9}.selected-head strong{color:var(--text);font-size:14px;font-weight:500}.selected-head strong span{color:var(--subtle);font-weight:400}.clear-files{padding:4px 0;background:none;color:var(--blue);font-size:12px}.file-row{height:52px;display:flex;align-items:center;gap:10px;padding:0 16px;border-bottom:1px solid #f1f5f9}.file-row:last-child{border-bottom:0}.file-type-icon{width:30px;height:30px;display:grid;place-items:center;border-radius:6px;color:var(--blue);background:#e8f1ff;font-size:13px;font-weight:700}.file-type-icon.video{background:#ede9ff;color:#7567df}.file-row-name{min-width:0;flex:1;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-row-size{color:var(--subtle);font-size:12px}.remove-file{width:24px;height:24px;padding:0;background:none;color:#9aaabd;font-size:18px}.expiry-row{display:flex;align-items:center;gap:16px;margin-top:20px;color:var(--muted);font-size:13px}.expiry-options{display:flex;gap:8px}.expiry{height:32px;padding:0 14px;border:1px solid #e5eaf0;border-radius:6px;background:#fff;color:var(--muted);font-size:13px}.expiry.active{border-color:var(--blue);background:#f0f7ff;color:var(--blue)}.start-button{height:44px;display:flex;align-items:center;gap:8px;margin-top:20px;padding:0 23px;border-radius:22px;background:var(--blue);color:#fff;font-size:14px;font-weight:500}.start-button:disabled{background:#dcebff;color:#a8c7f5;cursor:not-allowed}.start-button svg{width:18px;height:18px}.progress-panel{margin-top:20px;padding:16px;border:1px solid #e8eef5;border-radius:8px}.progress-header,.progress-foot{display:flex;justify-content:space-between}.progress-header b{font-size:13px;font-weight:500}.progress-header span,.progress-foot{color:var(--muted);font-size:12px}.progress-track{height:5px;margin-top:10px;overflow:hidden;border-radius:3px;background:#e8eef5}.progress-track span{display:block;width:0;height:100%;border-radius:3px;background:var(--blue);transition:width .2s}.progress-foot{margin-top:8px;color:var(--subtle);font-size:11px}.upload-result{display:inline-block;margin:20px 0 0;padding:12px 16px;border:1px solid #c6ecd5;border-radius:8px;background:#ecfdf3;color:#18794e}.result-code{margin-top:3px;color:#1677ff;font:600 20px "Microsoft YaHei",sans-serif;letter-spacing:2px}.receive-view{padding-top:32px}.receive-intro{text-align:center}.receive-icon{display:grid;place-items:center;width:48px;height:48px;margin:0 auto 12px;border-radius:50%;background:var(--soft);color:var(--blue)}.receive-icon svg{width:24px;height:24px}.receive-intro h3{margin:0;color:var(--ink);font-size:20px;font-weight:600}.receive-intro p{margin:8px 0 28px;color:var(--muted)}.receive-view label{display:block;margin-bottom:8px;color:var(--text);font-size:13px}.receive-code-row{display:flex;gap:8px}.receive-code-row input{height:44px;flex:1;min-width:0;padding:0 14px;border:1px solid #dbe5ee;border-radius:8px;outline:0;color:var(--ink);font-size:15px}.receive-code-row input:focus{border-color:var(--blue)}.receive-code-row button{width:82px;height:44px;border-radius:8px;background:var(--blue);color:#fff}.receive-result{min-height:100px;margin-top:16px;padding:16px;border:1px solid #edf2f7;border-radius:8px;color:var(--subtle);font-size:13px}.receive-result.ready{color:var(--text)}.receive-result a{display:block;margin-top:12px;color:var(--blue);font-weight:500;text-decoration:none}.hidden{display:none!important}