/* =============================================================
   s.222.is 短链接系统 - 主样式表
   设计风格：现代极简主义 + Glassmorphism
   支持亮色/暗色模式
   ============================================================= */

/* ========== CSS 变量（亮色模式） ========== */
:root,
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.8);
    --bg-input: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;
    --border-color: #e2e8f0;
    --border-focus: #2563eb;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: rgba(37, 99, 235, 0.1);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --purple: #8b5cf6;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --gradient-start: #2563eb;
    --gradient-end: #8b5cf6;
    --card-radius: 16px;
    --btn-radius: 12px;
    --input-radius: 12px;
}

/* ========== CSS 变量（暗色模式） ========== */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-nav: rgba(15, 23, 42, 0.85);
    --bg-input: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-inverse: #0f172a;
    --border-color: #334155;
    --border-focus: #3b82f6;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-light: rgba(59, 130, 246, 0.15);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.5);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(51, 65, 85, 0.3);
    --gradient-start: #3b82f6;
    --gradient-end: #a78bfa;
}

/* ========== Reset & Base ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover { color: var(--accent-hover); }

img { max-width: 100%; height: auto; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg-nav);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    height: 64px;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1100px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
}
.logo-icon { font-size: 1.5rem; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 8px;
    transition: all 0.2s;
    text-decoration: none;
}
.nav-link:hover {
    color: var(--text-primary);
    background: var(--accent-light);
}

/* 用户下拉菜单 */
.nav-user-dropdown {
    position: relative;
}
.nav-user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--border-color);
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.2s;
}
.nav-user-btn:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}
.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}
.user-role-badge {
    font-size: 0.625rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}
.user-role-badge.vip { background: #f59e0b; color: #fff; }
.user-role-badge.admin { background: #ef4444; color: #fff; }
.user-role-badge.user { background: var(--accent-light); color: var(--accent); }
.dropdown-arrow { transition: transform 0.2s; }
.nav-user-btn:hover .dropdown-arrow { transform: rotate(180deg); }

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.25s;
    z-index: 50;
    overflow: hidden;
}
.nav-user-dropdown:hover .dropdown-menu,
.nav-user-dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-user-info {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}
.dropdown-email {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}
.dropdown-item {
    display: block;
    padding: 10px 16px;
    font-size: 0.875rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.15s;
}
.dropdown-item:hover { background: var(--accent-light); }
.dropdown-highlight { color: var(--warning); font-weight: 600; }
.dropdown-danger { color: var(--danger); }
.dropdown-divider { height: 1px; background: var(--border-color); }

/* 主题切换 */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
}
.theme-toggle:hover {
    background: var(--accent-light);
    color: var(--accent);
}
[data-theme="light"] .moon-icon,
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="light"] .sun-icon,
[data-theme="dark"] .moon-icon { display: none; }

/* 移动端菜单 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s;
}
.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 12px;
    box-shadow: var(--shadow-md);
    z-index: 99;
}
.mobile-menu.open { display: block; }
.mobile-nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 1rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
    transition: background 0.15s;
}
.mobile-nav-link:hover { background: var(--accent-light); }
.mobile-nav-danger { color: var(--danger); }
.mobile-nav-primary { color: var(--accent); font-weight: 600; }

/* ========== 主内容区 ========== */
.main-content {
    padding-top: 64px;
    min-height: calc(100vh - 200px);
}

/* ========== Button 通用 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.875rem;
    padding: 10px 20px;
    border-radius: var(--btn-radius);
    border: none;
    cursor: pointer;
    transition: all 0.25s;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.2;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--gradient-end));
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.btn-primary:hover {
    box-shadow: 0 6px 24px rgba(37, 99, 235, 0.4);
    transform: translateY(-1px);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
}

.btn-danger {
    background: var(--danger);
    color: white;
}
.btn-danger:hover { background: #dc2626; color: white; }

.btn-sm { padding: 6px 14px; font-size: 0.8125rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-block { width: 100%; }

/* ========== Form 通用 ========== */
.form-input,
.form-select {
    width: 100%;
    padding: 10px 14px;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1.5px solid var(--border-color);
    border-radius: var(--input-radius);
    outline: none;
    transition: all 0.2s;
}
.form-input:focus,
.form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
    background: var(--bg-card);
}
.form-input::placeholder { color: var(--text-tertiary); }
.form-select { cursor: pointer; }
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1.5px solid var(--border-color);
    border-radius: var(--input-radius);
    outline: none;
    transition: all 0.2s;
    resize: vertical;
    min-height: 80px;
}
.form-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.form-error {
    color: var(--danger);
    font-size: 0.8125rem;
    margin-top: 8px;
    min-height: 20px;
}
.form-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}
.field-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 4px;
    display: block;
}

/* ========== Toast 消息 ========== */
.toast-container {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
    max-width: 360px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: var(--accent); }
.toast-warning { background: var(--warning); }

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast.removing {
    animation: slideOutRight 0.3s ease forwards;
}
@keyframes slideOutRight {
    to { transform: translateX(100%); opacity: 0; }
}

/* ========== Hero / 首页首屏 ========== */
.hero {
    padding: 80px 0 60px;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(37, 99, 235, 0.05) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    background: var(--accent-light);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 24px;
}
.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.6;
}

/* ========== URL 输入卡片 ========== */
.url-input-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 28px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.url-input-wrapper {
    position: relative;
}
.url-input-wrapper.has-error .url-input {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.url-input-group {
    display: flex;
    gap: 12px;
}
.url-input {
    flex: 1;
    padding: 16px 20px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--input-radius);
    outline: none;
    transition: all 0.25s;
}
.url-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-light);
    background: var(--bg-card);
}
.url-input::placeholder { color: var(--text-tertiary); }

.btn-generate {
    padding: 16px 32px;
    font-size: 1rem;
    flex-shrink: 0;
}

.url-input-error {
    color: var(--danger);
    font-size: 0.8125rem;
    margin-top: 8px;
    min-height: 20px;
    text-align: left;
}

/* 高级选项折叠 */
.advanced-options {
    margin-top: 16px;
}
.advanced-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    cursor: pointer;
    padding: 8px 0;
    transition: color 0.2s;
    width: 100%;
}
.advanced-toggle:hover { color: var(--text-secondary); }
.advanced-toggle .chevron { transition: transform 0.3s; margin-left: auto; }
.advanced-toggle.active .chevron { transform: rotate(180deg); }

.advanced-panel {
    display: none;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    animation: fadeDown 0.3s ease;
}
.advanced-panel.show { display: block; }

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.advanced-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.input-with-prefix {
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border: 1.5px solid var(--border-color);
    border-radius: var(--input-radius);
    transition: all 0.2s;
}
.input-with-prefix:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}
.input-prefix {
    padding: 0 0 0 14px;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    white-space: nowrap;
}
.input-with-prefix .form-input {
    border: none;
    background: transparent;
    padding-left: 4px;
}
.input-with-prefix .form-input:focus {
    box-shadow: none;
}

/* 加载状态 */
.loading-state {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px 0 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}
.loading-state.active { display: flex; }

.loading-spinner {
    width: 22px;
    height: 22px;
    border: 2.5px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== 结果卡片（弹窗） ========== */
.result-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.result-overlay.open { display: flex; }

.result-card {
    background: var(--bg-card);
    border-radius: 24px;
    padding: 36px;
    max-width: 520px;
    width: 100%;
    box-shadow: var(--shadow-xl);
    animation: modalIn 0.3s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.result-header {
    text-align: center;
    margin-bottom: 24px;
}
.result-success-icon { margin-bottom: 12px; }
.result-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.result-url-box {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}
.result-url-input {
    flex: 1;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1.5px solid var(--border-color);
    border-radius: var(--input-radius);
    outline: none;
}
.btn-copy {
    flex-shrink: 0;
}

.result-extras {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
}
.result-qr {
    flex-shrink: 0;
    text-align: center;
}
.result-qr img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    background: white;
    padding: 4px;
    border: 1px solid var(--border-color);
}
.qr-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}
.result-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.result-info-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.info-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.info-value {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    word-break: break-all;
    line-height: 1.4;
}

.result-close-btn {
    width: 100%;
    padding: 10px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 8px;
}
.result-close-btn:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

/* ========== 广告位 ========== */
.ad-banner,
.ad-result,
.ad-transit {
    margin-top: 24px;
}
.ad-placeholder {
    padding: 16px;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
}
.ad-small { padding: 12px; font-size: 0.6875rem; }

/* ========== 特性介绍 ========== */
.features {
    padding: 80px 0;
    background: var(--bg-secondary);
}
.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 48px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 28px;
    text-align: center;
    transition: all 0.3s;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.feature-card h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.feature-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 使用步骤 ========== */
.steps {
    padding: 80px 0;
}
.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.step-item {
    text-align: center;
    flex: 1;
    max-width: 240px;
}
.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 12px;
}
.step-item h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}
.step-item p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.step-arrow {
    color: var(--text-tertiary);
    flex-shrink: 0;
}

/* ========== 价格/权益对比 ========== */
.pricing {
    padding: 80px 0;
    background: var(--bg-secondary);
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
}
.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 32px;
    text-align: center;
    position: relative;
    transition: all 0.3s;
}
.pricing-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.pricing-featured {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), var(--shadow-md);
}
.pricing-featured:hover {
    box-shadow: 0 0 0 1px var(--accent), var(--shadow-lg);
}
.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent), var(--gradient-end));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 100px;
}
.pricing-header {
    margin-bottom: 20px;
}
.pricing-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.pricing-price {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-primary);
}
.price-symbol {
    font-size: 1.125rem;
    font-weight: 600;
    vertical-align: super;
}
.price-period {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-tertiary);
}
.pricing-desc {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 24px;
}
.pricing-features li {
    padding: 8px 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.feature-yes::before { content: '✅'; }
.feature-no::before { content: '❌'; }
.feature-warn::before { content: '⚠️'; }

/* ========== 认证页面（登录/注册） ========== */
.auth-page {
    background: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.auth-container {
    width: 100%;
    max-width: 440px;
    padding: 24px;
}
.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 36px;
    box-shadow: var(--shadow-lg);
}
.auth-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: 24px;
}
.auth-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 4px;
}
.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    background: var(--bg-input);
    border-radius: 10px;
    padding: 4px;
}
.auth-tab {
    flex: 1;
    padding: 8px 16px;
    border: none;
    background: none;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
}
.auth-tab.active {
    background: var(--bg-card);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.auth-form { display: none; }
.auth-form.active { display: block; }

.code-input-row {
    display: flex;
    gap: 8px;
}
.code-input-row .form-input { flex: 1; }

.auth-footer-text {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 16px;
}
.auth-back {
    display: block;
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 20px;
}
.auth-benefits {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}
.auth-benefit {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}
.auth-benefit svg { color: var(--success); }

.form-agreement {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
    margin-top: 3px;
    accent-color: var(--accent);
}

/* ========== 控制台（Dashboard） ========== */
.dashboard-header {
    background: linear-gradient(135deg, var(--accent-light), transparent);
    padding: 40px 0 30px;
    border-bottom: 1px solid var(--border-color);
}
.dashboard-greeting {
    font-size: 1.75rem;
    font-weight: 800;
}
.dashboard-subtitle {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-top: 4px;
}

/* 升级横幅 */
.upgrade-banner {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-radius: 16px;
    padding: 20px 24px;
    margin: 24px 0;
}
[data-theme="dark"] .upgrade-banner {
    background: linear-gradient(135deg, #451a03, #78350f);
}
.upgrade-content {
    display: flex;
    align-items: center;
    gap: 16px;
}
.upgrade-icon {
    font-size: 2rem;
    flex-shrink: 0;
}
.upgrade-text { flex: 1; }
.upgrade-text h3 {
    font-size: 1rem;
    font-weight: 700;
}
.upgrade-text p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* 权益对比表 */
.comparison-table-wrapper {
    overflow-x: auto;
    margin: 24px 0;
}
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}
.comparison-table th,
.comparison-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.comparison-table th {
    font-weight: 700;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.comparison-table th:first-child { width: 40%; }
.col-free { color: var(--text-secondary); }
.col-vip { color: var(--accent); font-weight: 600; }

.badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 100px;
}
.badge-success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 24px 0;
}
.admin-stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 20px 0;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.2s;
    cursor: default;
}
.stat-card[onclick] { cursor: pointer; }
.stat-card[onclick]:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}
.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.stat-icon-blue { background: rgba(37, 99, 235, 0.12); color: #2563eb; }
.stat-icon-green { background: rgba(16, 185, 129, 0.12); color: #10b981; }
.stat-icon-purple { background: rgba(139, 92, 246, 0.12); color: #8b5cf6; }
.stat-icon-orange { background: rgba(245, 158, 11, 0.12); color: #f59e0b; }
.stat-info { display: flex; flex-direction: column; gap: 2px; }
.stat-label { font-size: 0.75rem; color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 1.5rem; font-weight: 800; color: var(--text-primary); }

/* 图表卡片 */
.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 24px;
    margin: 20px 0;
}
.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.chart-header h3 {
    font-size: 1rem;
    font-weight: 700;
}
.chart-period {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    background: var(--bg-input);
    padding: 4px 12px;
    border-radius: 100px;
}
.chart-body { position: relative; }
.chart-body canvas { max-height: 280px; }

/* 页面区块（默认的链接页、统计页等） */
.page-section {
    padding: 32px 0 60px;
}
.page-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 4px;
}
.page-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 24px;
}
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

/* 搜索栏 */
.search-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 4px 4px 4px 16px;
    margin-bottom: 20px;
}
.search-icon {
    color: var(--text-tertiary);
    flex-shrink: 0;
}
.search-input {
    flex: 1;
    border: none;
    background: none;
    padding: 10px 0;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-primary);
    outline: none;
}
.search-input::placeholder { color: var(--text-tertiary); }

/* 数据表格 */
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}
.data-table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}
.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-secondary); }
.table-empty {
    text-align: center;
    color: var(--text-tertiary);
    padding: 40px 16px !important;
}
.link-target {
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-secondary);
}
.link-short {
    font-weight: 600;
    color: var(--accent);
}
.action-cell {
    display: flex;
    gap: 6px;
    flex-wrap: nowrap;
}
.click-count {
    font-weight: 700;
    color: var(--accent);
}

/* 状态徽章 */
.status-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 100px;
}
.status-active { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.status-disabled { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.status-expired { background: rgba(245, 158, 11, 0.15); color: var(--warning); }

.role-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 100px;
}
.role-badge.admin { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.role-badge.vip { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.role-badge.user { background: var(--accent-light); color: var(--accent); }

/* 分页 */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 24px;
}
.page-btn {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 8px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}
.page-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.page-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* ========== 过期页面 ========== */
.expired-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
}
.expired-card {
    text-align: center;
    max-width: 480px;
    padding: 48px 32px;
}
.expired-icon { margin-bottom: 16px; }
.expired-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.expired-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 28px;
}
.expired-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}
.expired-code {
    margin-top: 20px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ========== 中转广告页 ========== */
.transit-page {
    background: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.transit-container {
    max-width: 480px;
    width: 100%;
    padding: 24px;
}
.transit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.transit-header {
    margin-bottom: 28px;
}
.transit-header .logo-icon { font-size: 2rem; }
.transit-header .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
}

/* 倒计时圆环 */
.countdown-circle {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
}
.countdown-svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}
.countdown-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 6;
}
.countdown-progress {
    fill: none;
    stroke: var(--accent);
    stroke-width: 6;
    stroke-linecap: round;
    transition: stroke-dashoffset 1s linear;
}
.countdown-text {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.countdown-text span {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}
.countdown-text small {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}
.transit-hint {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 24px;
}
.transit-footer {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 20px;
}

/* ========== 维护页面 ========== */
.maintenance-page {
    background: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.maintenance-container {
    text-align: center;
    padding: 24px;
}
.maintenance-card {
    max-width: 400px;
}
.maintenance-icon { font-size: 4rem; margin-bottom: 16px; }
.maintenance-card h1 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.maintenance-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}
.maintenance-hint {
    font-size: 0.8125rem !important;
    margin-top: 8px;
    color: var(--text-tertiary) !important;
}

/* ========== 设置页面 ========== */
.settings-form {
    max-width: 720px;
}
.setting-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 24px;
    margin-bottom: 20px;
}
.setting-section h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.form-inline {
    display: flex;
    gap: 8px;
    align-items: center;
}
.form-inline .form-input {
    flex: 1;
}

/* ========== 设置卡片（账户设置页） ========== */
.setting-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.setting-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 24px;
}
.setting-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
}
.setting-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}
.setting-item:last-child { border-bottom: none; }
.setting-item label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    min-width: 80px;
    flex-shrink: 0;
}
.setting-value { font-size: 0.875rem; }
.setting-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}
.setting-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}
.password-change-form {
    max-width: 240px;
}
.password-change-form .form-input {
    width: 100%;
}
.api-key-box {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}
.api-key-box .form-input {
    max-width: 360px;
}
.upgrade-hint {
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 10px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ========== VIP 页面 ========== */
.vip-status-card {
    text-align: center;
    padding: 48px 24px;
}
.vip-status-icon { font-size: 3rem; margin-bottom: 12px; }
.vip-status-card h2 { font-size: 1.5rem; font-weight: 800; margin-bottom: 8px; }
.vip-status-card p { color: var(--text-secondary); margin-bottom: 20px; }
.vip-perks {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 400px;
    margin: 0 auto;
}
.perk-item {
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 10px;
    font-size: 0.875rem;
}
.vip-intro {
    text-align: center;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}
.vip-pricing {
    max-width: 600px;
}
.vip-contact {
    text-align: center;
    margin-top: 32px;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ========== 后台快捷导航 ========== */
.admin-quick-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 20px;
}
.quick-link-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.875rem;
    font-weight: 600;
}
.quick-link-card:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: var(--shadow-sm);
}

/* ========== 模态框 ========== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.modal-overlay.open { display: flex; }
.modal-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 28px;
    max-width: 440px;
    width: 100%;
    box-shadow: var(--shadow-xl);
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.modal-header h3 { font-size: 1.125rem; font-weight: 700; }
.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ========== 静态页面（关于/隐私/条款） ========== */
.static-content {
    max-width: 720px;
    margin: 0 auto;
}
.static-content h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 20px;
}
.static-content h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 32px 0 12px;
}
.static-content p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}
.static-content ul {
    padding-left: 20px;
    margin-bottom: 16px;
}
.static-content ul li {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========== 警告/提示 ========== */
.alert {
    padding: 12px 20px;
    border-radius: 10px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 20px;
}
.alert-success {
    background: rgba(16, 185, 129, 0.12);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 48px 0 0;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    padding-bottom: 32px;
}
.footer-brand .logo-text {
    font-size: 1.125rem;
    font-weight: 700;
}
.footer-desc {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 8px;
}
.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.footer-col h4 {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}
.footer-col a {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    padding: 4px 0;
    text-decoration: none;
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .admin-stats-row { grid-template-columns: repeat(2, 1fr); }
    .admin-quick-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links .nav-link:not(.btn),
    .nav-links .nav-user-dropdown { display: none; }
    .mobile-menu-btn { display: flex; }

    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }

    .url-input-group { flex-direction: column; }
    .btn-generate { width: 100%; }
    .advanced-row { grid-template-columns: 1fr; }

    .features-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .admin-stats-row { grid-template-columns: 1fr; }
    .admin-quick-links { grid-template-columns: repeat(2, 1fr); }

    .steps-grid { flex-direction: column; gap: 16px; }
    .step-arrow { transform: rotate(90deg); }

    .result-extras { flex-direction: column; align-items: center; }
    .result-card { padding: 24px; }

    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .footer-links { grid-template-columns: 1fr 1fr; }

    .section-title { font-size: 1.5rem; }
    .upgrade-content { flex-direction: column; text-align: center; }

    .pricing-card { padding: 24px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .admin-quick-links { grid-template-columns: 1fr; }
}