:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary: #7c3aed;
    --accent: #f59e0b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-card: #1e293b;
    --dark-hover: #334155;
    --light: #f8fafc;
    --light-card: #ffffff;
    --light-hover: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg: var(--dark);
    --card: var(--dark-card);
    --card-hover: var(--dark-hover);
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --border: #334155;
}

[data-theme="light"] {
    --bg: var(--light);
    --card: var(--light-card);
    --card-hover: var(--light-hover);
    --text: var(--text-primary);
    --text-secondary: var(--text-secondary);
    --border: var(--border);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    transition: var(--transition);
}

/* 动态背景 */
.bg-gradient {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: -1;
    opacity: 0.4;
}
.bg-gradient .orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    animation: float 20s ease-in-out infinite;
}
.orb-1 { width: 500px; height: 500px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); top: -10%; left: -5%; }
.orb-2 { width: 400px; height: 400px; background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); top: 60%; right: -5%; animation-delay: -5s; }
.orb-3 { width: 300px; height: 300px; background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); bottom: -5%; left: 30%; animation-delay: -10s; }
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 30px) scale(1.02); }
}

/* 布局 */
.app-container { display: flex; min-height: 100vh; }

/* 侧边栏 */
.sidebar {
    width: 280px;
    background: var(--card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}
.sidebar-header { padding: 24px; border-bottom: 1px solid var(--border); }
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}
.brand-icon {
    width: 48px; height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 22px;
    box-shadow: var(--shadow);
    flex-shrink: 0;
}
.brand-text h1 {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.brand-text span { font-size: 11px; color: var(--text-secondary); font-weight: 400; }
.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.nav-section { margin-bottom: 24px; }
.nav-section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    padding: 0 16px;
    margin-bottom: 8px;
    font-weight: 600;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 11px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 4px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    position: relative;
}
.nav-item:hover { background: var(--card-hover); color: var(--text); }
.nav-item.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    box-shadow: var(--shadow);
}
.nav-item i { width: 24px; text-align: center; font-size: 16px; }
.nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 20px;
    font-weight: 600;
}
.sidebar-footer { padding: 16px; border-top: 1px solid var(--border); }
.storage-bar { margin-bottom: 12px; }
.storage-info {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.storage-progress {
    height: 6px;
    background: var(--card-hover);
    border-radius: 10px;
    overflow: hidden;
}
.storage-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 10px;
    transition: width 0.5s ease;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 24px 32px;
    max-width: calc(100% - 280px);
}
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 200;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    font-size: 18px;
    cursor: pointer;
    box-shadow: var(--shadow);
}

/* 顶部栏 */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.search-box { position: relative; width: 400px; }
.search-box input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--card);
    color: var(--text);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
}
.search-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}
.top-actions { display: flex; align-items: center; gap: 12px; }
.icon-btn {
    width: 40px; height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 16px;
}
.icon-btn:hover { background: var(--card-hover); color: var(--text); }
.user-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow);
    font-size: 14px;
}

/* 页面标题 */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.page-title {
    font-size: 24px;
    font-weight: 700;
}
.page-title i {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-right: 10px;
}
.page-desc { color: var(--text-secondary); font-size: 14px; margin-top: 4px; }

/* Hero卡片 */
.hero-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius);
    padding: 36px;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    margin-bottom: 32px;
}
.hero-card::before {
    content: '';
    position: absolute;
    top: -50%; right: -10%;
    width: 400px; height: 400px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    animation: pulse 4s ease-in-out infinite;
}
.hero-card::after {
    content: '';
    position: absolute;
    bottom: -30%; right: 20%;
    width: 250px; height: 250px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    animation: pulse 4s ease-in-out infinite 1s;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}
.hero-content { position: relative; z-index: 1; }
.hero-content h2 { font-size: 28px; font-weight: 700; margin-bottom: 10px; }
.hero-content p { font-size: 15px; opacity: 0.9; margin-bottom: 24px; max-width: 500px; }
.hero-stats { display: flex; gap: 40px; }
.hero-stat { text-align: center; }
.hero-stat .number { font-size: 26px; font-weight: 700; }
.hero-stat .label { font-size: 13px; opacity: 0.8; }

/* 上传区 */
.upload-section { margin-bottom: 32px; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.section-title { font-size: 18px; font-weight: 700; color: var(--text); }
.section-subtitle { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 50px 40px;
    text-align: center;
    background: var(--card);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}
.upload-icon {
    width: 72px; height: 72px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary-light) 0%, #ede9fe 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary);
    transition: var(--transition);
}
.upload-zone:hover .upload-icon { transform: scale(1.1); }
.upload-zone h3 { font-size: 17px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.upload-zone p { color: var(--text-secondary); font-size: 13px; margin-bottom: 14px; }
.upload-formats { display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; }
.format-tag {
    padding: 3px 10px;
    background: var(--card-hover);
    border-radius: 20px;
    font-size: 11px;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.upload-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    padding: 11px 28px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}
.upload-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* 工具卡片网格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}
.tool-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
}
.tool-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 100%;
    background: linear-gradient(180deg, var(--primary) 0%, var(--secondary) 100%);
    opacity: 0;
    transition: opacity 0.3s;
}
.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}
.tool-card:hover::before { opacity: 1; }
.tool-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 14px;
    transition: var(--transition);
}
.tool-card:hover .tool-icon { transform: scale(1.1); }
.tool-icon.pdf { background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%); color: #dc2626; }
.tool-icon.image { background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%); color: #2563eb; }
.tool-icon.audio { background: linear-gradient(135deg, #dcfce7 0%, #bbf7d0 100%); color: #16a34a; }
.tool-icon.video { background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%); color: #d97706; }
.tool-icon.office { background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%); color: #4f46e5; }
.tool-icon.ocr { background: linear-gradient(135deg, #fae8ff 0%, #f5d0fe 100%); color: #a21caf; }
.tool-icon.compress { background: linear-gradient(135deg, #ccfbf1 0%, #99f6e4 100%); color: #0d9488; }
.tool-icon.convert { background: linear-gradient(135deg, #ffedd5 0%, #fed7aa 100%); color: #ea580c; }
.tool-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.tool-card p { font-size: 12px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; }
.tool-meta { display: flex; gap: 10px; font-size: 11px; color: var(--text-muted); }
.tool-meta span { display: flex; align-items: center; gap: 3px; }
.tool-arrow {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    opacity: 0;
    transition: var(--transition);
}
.tool-card:hover .tool-arrow { opacity: 1; right: 16px; }

/* 最近任务 */
.recent-tasks {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.tasks-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.tasks-header h3 { font-size: 15px; font-weight: 600; }
.view-all { color: var(--primary); font-size: 13px; text-decoration: none; font-weight: 500; }
.task-list { padding: 8px 0; }
.task-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.task-item:last-child { border-bottom: none; }
.task-item:hover { background: var(--card-hover); }
.task-icon {
    width: 36px; height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 14px;
    font-size: 14px;
}
.task-icon.success { background: #dcfce7; color: #16a34a; }
.task-icon.processing { background: #dbeafe; color: #2563eb; }
.task-icon.pending { background: #fef3c7; color: #d97706; }
.task-icon.failed { background: #fee2e2; color: #dc2626; }
.task-info { flex: 1; min-width: 0; }
.task-info h4 { font-size: 13px; font-weight: 500; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.task-info span { font-size: 11px; color: var(--text-muted); }
.task-status {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
}
.task-status.success { background: #dcfce7; color: #16a34a; }
.task-status.processing { background: #dbeafe; color: #2563eb; }
.task-status.pending { background: #fef3c7; color: #d97706; }
.task-status.failed { background: #fee2e2; color: #dc2626; }
.task-actions { display: flex; gap: 6px; margin-left: 12px; }
.task-action-btn {
    width: 30px; height: 30px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 12px;
}
.task-action-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }

/* 页脚 */
.footer {
    text-align: center;
    padding: 32px 0;
    color: var(--text-muted);
    font-size: 12px;
}
.footer a { color: var(--primary); text-decoration: none; }

/* 工具页面 */
.tool-page {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
}
.tool-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
}
.tool-tab {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.tool-tab:hover { color: var(--text); background: var(--card-hover); }
.tool-tab.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* 表单 */
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.form-input, .form-select {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    transition: var(--transition);
    outline: none;
    font-family: inherit;
    background: var(--card);
    color: var(--text);
}
.form-input:focus, .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 6px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    box-shadow: var(--shadow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-secondary { background: var(--bg); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-group { display: flex; gap: 10px; margin-top: 20px; }

/* 文件列表 */
.file-list { margin-top: 16px; }
.file-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 8px;
    background: var(--card);
}
.file-icon { width: 40px; height: 40px; border-radius: 8px; display: flex; align-items: center; justify-content: center; margin-right: 12px; font-size: 18px; }
.file-info { flex: 1; }
.file-info h4 { font-size: 13px; font-weight: 500; margin-bottom: 2px; }
.file-info span { font-size: 11px; color: var(--text-muted); }
.file-remove { width: 30px; height: 30px; border-radius: 6px; border: none; background: transparent; color: var(--text-muted); cursor: pointer; }
.file-remove:hover { color: var(--danger); }

/* 进度条 */
.progress-wrapper { margin: 16px 0; }
.progress-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-secondary); margin-bottom: 6px; }
.progress-bar {
    height: 6px;
    background: var(--card-hover);
    border-radius: 10px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 0%;
}

/* 消息提示 */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.toast {
    padding: 14px 20px;
    border-radius: 12px;
    color: white;
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 0.3s ease;
    max-width: 360px;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}
.empty-state i { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
.empty-state h3 { font-size: 16px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state p { font-size: 13px; }

/* 分页 */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 20px; }
.pagination a, .pagination span {
    padding: 7px 14px;
    border-radius: 8px;
    font-size: 13px;
    text-decoration: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: var(--card);
}
.pagination a:hover { background: var(--card-hover); color: var(--text); }
.pagination .current { background: var(--primary); color: white; border-color: var(--primary); }

/* 表格 */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 12px 16px; text-align: left; font-size: 13px; }
.data-table th { font-weight: 600; color: var(--text-secondary); border-bottom: 1px solid var(--border); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.data-table td { border-bottom: 1px solid var(--border); color: var(--text); }
.data-table tr:hover td { background: var(--card-hover); }
.data-table td .badge {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
}
.badge-success { background: #dcfce7; color: #16a34a; }
.badge-warning { background: #fef3c7; color: #d97706; }
.badge-danger { background: #fee2e2; color: #dc2626; }
.badge-info { background: #dbeafe; color: #2563eb; }

/* 响应式 */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; max-width: 100%; padding: 16px; }
    .mobile-menu-btn { display: flex; }
    .hero-stats { gap: 24px; }
}
@media (max-width: 768px) {
    .hero-card { padding: 24px; }
    .hero-content h2 { font-size: 20px; }
    .search-box { width: 100%; }
    .tools-grid { grid-template-columns: 1fr; }
    .top-bar { flex-direction: column; gap: 12px; }
    .form-row { grid-template-columns: 1fr; }
    .hero-stats { flex-wrap: wrap; gap: 16px; }
}

/* 滚动条 */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* 动画 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.5s ease forwards; }
.delay-1 { animation-delay: 0.08s; }
.delay-2 { animation-delay: 0.16s; }
.delay-3 { animation-delay: 0.24s; }
.delay-4 { animation-delay: 0.32s; }