/* ============================================
   佳梦云网络实名认证平台 - 主样式
   白色主色调 + 卡片风格 + 官网设计
   ============================================ */

/* ===== CSS 变量 ===== */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-foreground: #ffffff;
    --primary-gradient: linear-gradient(135deg, #2563eb, #7c3aed);

    --background: #ffffff;
    --background-alt: #f8fafc;
    --foreground: #1e293b;

    --card: #ffffff;
    --card-foreground: #1e293b;
    --card-border: #e2e8f0;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --card-shadow-hover: 0 10px 30px rgba(37,99,235,0.08), 0 4px 10px rgba(0,0,0,0.04);

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --border: #e2e8f0;
    --border-focus: #2563eb;

    --success: #16a34a;
    --success-bg: #f0fdf4;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --danger: #dc2626;
    --danger-bg: #fef2f2;
    --info: #2563eb;
    --info-bg: #eff6ff;

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;

    --transition: all 0.2s ease;
    --transition-slow: all 0.3s ease;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; height: auto; }

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-6); }
.container-sm { max-width: 800px; margin: 0 auto; padding: 0 var(--space-6); }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226,232,240,0.5);
    transition: var(--transition-slow);
}
.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    box-shadow: 0 1px 10px rgba(0,0,0,0.05);
}
.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}
.navbar-brand-icon {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.125rem;
    font-weight: 700;
}
.navbar-links {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}
.navbar-links a {
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius);
    transition: var(--transition);
}
.navbar-links a:hover,
.navbar-links a.active {
    background: var(--primary-light);
    color: var(--primary);
}
.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.navbar-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.5rem;
}
.navbar-toggle:hover { background: #f1f5f9; }

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(160deg, #ffffff 0%, #f0f4ff 40%, #e0ecff 70%, #f8fafc 100%);
}
.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 720px;
    padding: var(--space-6);
    animation: heroFadeIn 1s ease;
}
@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 6px 16px;
    background: rgba(37,99,235,0.08);
    border: 1px solid rgba(37,99,235,0.15);
    border-radius: 999px;
    font-size: 0.8125rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: var(--space-6);
}
.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}
.hero-title span {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}
.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-muted);
    font-size: 0.75rem;
    animation: bounce 2s infinite;
}
@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}
.hero-scroll-arrow {
    width: 24px;
    height: 24px;
    border: 2px solid var(--text-muted);
    border-left: none;
    border-top: none;
    transform: rotate(45deg);
}

/* ===== 通用 Section ===== */
.section {
    padding: var(--space-20) 0;
}
.section-alt {
    background: var(--background-alt);
}
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}
.section-label {
    display: inline-block;
    padding: 4px 14px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 999px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: var(--space-4);
}
.section-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}
.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 特性卡片 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-6);
}
.feature-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition-slow);
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(37,99,235,0.2);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-5);
    transition: var(--transition-slow);
}
.feature-card:hover .feature-icon {
    background: var(--primary-gradient);
    color: white;
    transform: scale(1.1);
}
.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}
.feature-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 平台展示 ===== */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-5);
}
.platform-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: var(--transition-slow);
}
.platform-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}
.platform-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-3);
}
.platform-name {
    font-size: 0.9375rem;
    font-weight: 600;
}
.platform-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: var(--space-1);
}

/* ===== 流程步骤 ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
    position: relative;
}
.step-card {
    text-align: center;
    position: relative;
}
.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}
.step-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}
.step-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===== CTA 区域 ===== */
.cta-section {
    background: var(--primary-gradient);
    padding: var(--space-16) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 60%);
    animation: ctaGlow 8s ease infinite;
}
@keyframes ctaGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(10%, 10%); }
}
.cta-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-4);
    position: relative;
}
.cta-subtitle {
    font-size: 1rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: var(--space-8);
    position: relative;
}
.cta-actions {
    position: relative;
}

/* ===== 页脚 ===== */
.footer {
    background: #0f172a;
    color: #94a3b8;
    padding: var(--space-12) 0 var(--space-8);
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}
.footer-brand .footer-logo {
    font-size: 1.125rem;
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-3);
}
.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.7;
    max-width: 300px;
}
.footer-col h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-4);
}
.footer-col a {
    display: block;
    font-size: 0.8125rem;
    color: #94a3b8;
    padding: 4px 0;
    transition: var(--transition);
}
.footer-col a:hover { color: white; }
.footer-bottom {
    border-top: 1px solid rgba(148,163,184,0.15);
    padding-top: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    font-size: 0.8125rem;
}
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: white; }

/* ===== 卡片 ===== */
.card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: var(--transition-slow);
}
.card:hover { box-shadow: var(--card-shadow-hover); }
.card-header { padding: var(--space-6) var(--space-6) 0; }
.card-body { padding: var(--space-6); }
.card-footer { padding: 0 var(--space-6) var(--space-6); }
.card-title { font-size: 1.25rem; font-weight: 600; margin-bottom: var(--space-1); }
.card-subtitle { font-size: 0.875rem; color: var(--text-secondary); }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 10px 24px;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    user-select: none;
    font-family: inherit;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
    background: var(--primary-gradient);
    color: var(--primary-foreground);
    border-color: transparent;
}
.btn-primary:hover:not(:disabled) {
    box-shadow: 0 4px 15px rgba(37,99,235,0.35);
    transform: translateY(-1px);
}
.btn-secondary {
    background: #f1f5f9;
    color: var(--text-primary);
    border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) { background: #e2e8f0; }
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border);
}
.btn-outline:hover:not(:disabled) {
    background: #f8fafc;
    border-color: var(--text-secondary);
}
.btn-white {
    background: white;
    color: var(--primary);
    border-color: transparent;
}
.btn-white:hover:not(:disabled) {
    background: #f8fafc;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(255,255,255,0.3);
}
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: transparent;
}
.btn-ghost:hover:not(:disabled) { background: #f1f5f9; color: var(--text-primary); }
.btn-danger { background: var(--danger); color: white; border-color: var(--danger); }
.btn-danger:hover:not(:disabled) { background: #b91c1c; }
.btn-sm { padding: 6px 14px; font-size: 0.8125rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-block { width: 100%; }
.btn-icon { width: 36px; height: 36px; padding: 0; border-radius: var(--radius); }

/* ===== 表单 ===== */
.form-group { margin-bottom: var(--space-5); }
.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}
.form-label .required { color: var(--danger); margin-left: 2px; }
.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.875rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
    outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-input.error, .form-select.error, .form-textarea.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(220,38,38,0.1);
}
.form-textarea { min-height: 100px; resize: vertical; }
.form-hint { font-size: 0.8125rem; color: var(--text-secondary); margin-top: var(--space-1); }
.form-error { font-size: 0.8125rem; color: var(--danger); margin-top: var(--space-1); }
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ===== 徽章 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 999px;
    line-height: 1.5;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-secondary { background: #f1f5f9; color: var(--text-secondary); }

/* ===== 表格 ===== */
.table-container {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}
table { width: 100%; border-collapse: collapse; }
table th, table td {
    padding: 12px 16px;
    text-align: left;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
}
table th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
table tr:last-child td { border-bottom: none; }
table tr:hover td { background: #f8fafc; }

/* ===== 弹窗 ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--card);
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 50px rgba(0,0,0,0.15);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalIn 0.2s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6) var(--space-6) 0;
}
.modal-title { font-size: 1.125rem; font-weight: 600; }
.modal-close {
    width: 32px; height: 32px;
    display: flex; align-items: center; justify-content: center;
    border: none; background: transparent;
    border-radius: var(--radius); cursor: pointer;
    color: var(--text-secondary); transition: var(--transition);
    font-size: 1.25rem;
}
.modal-close:hover { background: #f1f5f9; color: var(--text-primary); }
.modal-body { padding: var(--space-6); }
.modal-footer {
    display: flex; align-items: center; justify-content: flex-end;
    gap: var(--space-3); padding: 0 var(--space-6) var(--space-6);
}

/* ===== 提示消息 ===== */
.toast {
    position: fixed; top: var(--space-6); right: var(--space-6);
    z-index: 2000; display: flex; flex-direction: column; gap: var(--space-3);
}
.toast-item {
    display: flex; align-items: center; gap: var(--space-3);
    padding: 14px 20px; background: var(--card);
    border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    font-size: 0.875rem; animation: toastIn 0.3s ease; min-width: 300px;
}
.toast-item.success { border-left: 4px solid var(--success); }
.toast-item.error { border-left: 4px solid var(--danger); }
.toast-item.warning { border-left: 4px solid var(--warning); }
.toast-item.info { border-left: 4px solid var(--info); }
@keyframes toastIn {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

/* ===== 空状态 ===== */
.empty-state { text-align: center; padding: var(--space-12) var(--space-6); }
.empty-state-icon { font-size: 3rem; margin-bottom: var(--space-4); opacity: 0.3; }
.empty-state-title { font-size: 1.125rem; font-weight: 600; margin-bottom: var(--space-2); }
.empty-state-desc { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: var(--space-6); }

/* ===== 加载 ===== */
.loading { display: flex; align-items: center; justify-content: center; padding: var(--space-12); }
.spinner {
    width: 32px; height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 后台布局 ===== */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 240px;
    background: var(--card);
    border-right: 1px solid var(--border);
    padding: var(--space-6);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    overflow-y: auto;
    z-index: 50;
}
.admin-sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border);
}
.admin-sidebar-brand .brand-icon {
    width: 32px; height: 32px;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 0.875rem; font-weight: 700; flex-shrink: 0;
}
.admin-nav { display: flex; flex-direction: column; gap: var(--space-1); }
.admin-nav a {
    display: flex; align-items: center; gap: var(--space-3);
    padding: 10px 14px; font-size: 0.875rem; font-weight: 500;
    color: var(--text-secondary); border-radius: var(--radius);
    transition: var(--transition);
}
.admin-nav a:hover { background: #f1f5f9; color: var(--text-primary); }
.admin-nav a.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}
.admin-nav a .nav-icon { width: 20px; text-align: center; font-size: 1rem; }
.admin-main { flex: 1; margin-left: 240px; padding: var(--space-8); }
.admin-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: var(--space-8);
}
.admin-header h2 { font-size: 1.5rem; font-weight: 700; }
.admin-header-actions { display: flex; align-items: center; gap: var(--space-3); }

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}
.stat-card { padding: var(--space-5); }
.stat-card .stat-label { font-size: 0.8125rem; color: var(--text-secondary); margin-bottom: var(--space-2); }
.stat-card .stat-value { font-size: 1.75rem; font-weight: 700; color: var(--text-primary); }
.stat-card .stat-icon {
    float: right; width: 40px; height: 40px;
    border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem;
}

/* ===== 操作栏 ===== */
.action-bar {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: var(--space-5); gap: var(--space-4); flex-wrap: wrap;
}
.action-bar-left, .action-bar-right { display: flex; align-items: center; gap: var(--space-3); }
.search-box { position: relative; }
.search-box input { padding-left: 36px; width: 240px; }
.search-box .search-icon {
    position: absolute; left: 12px; top: 50%;
    transform: translateY(-50%); color: var(--text-muted);
}

/* ===== 内容页面（服务条款/API文档/联系我们） ===== */
.content-page {
    padding-top: 100px;
    padding-bottom: var(--space-12);
}
.content-page h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-6);
}
.content-page h2 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-top: var(--space-8);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--border);
}
.content-page h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
}
.content-page p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-4);
}
.content-page ul, .content-page ol {
    padding-left: var(--space-6);
    margin-bottom: var(--space-4);
}
.content-page li {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-2);
}
.content-page .card {
    padding: var(--space-8);
    margin-bottom: var(--space-6);
}
.content-page code {
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    color: var(--primary);
}
.content-page pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: var(--space-5);
    border-radius: var(--radius);
    overflow-x: auto;
    margin-bottom: var(--space-4);
    font-size: 0.8125rem;
    line-height: 1.6;
}
.content-page pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}
.contact-info-card {
    padding: var(--space-8);
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; }
.contact-item-icon {
    width: 40px; height: 40px;
    background: var(--primary-light);
    border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.125rem; flex-shrink: 0;
}
.contact-item-label { font-size: 0.8125rem; color: var(--text-secondary); margin-bottom: 2px; }
.contact-item-value { font-size: 0.9375rem; font-weight: 500; }

/* ===== 认证页面 ===== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background: linear-gradient(135deg, #f0f4ff 0%, #f8fafc 100%);
}
.auth-card {
    width: 100%;
    max-width: 440px;
    padding: var(--space-8);
}
.auth-logo {
    text-align: center;
    margin-bottom: var(--space-8);
}
.auth-logo-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}
.auth-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}
.auth-logo p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--space-1);
}

/* ===== 登录页面 ===== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background: linear-gradient(135deg, #f0f4ff 0%, #f8fafc 100%);
}
.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--card-shadow);
    padding: var(--space-8);
}
.login-header {
    text-align: center;
    margin-bottom: var(--space-8);
}
.login-logo {
    width: 56px;
    height: 56px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}
.login-header h1 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
}
.login-header p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--space-1);
}
.login-footer {
    text-align: center;
    margin-top: var(--space-6);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border);
}
.login-footer a {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* ===== 提示框 ===== */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: var(--space-4);
    line-height: 1.5;
}
.alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(220,38,38,0.15);
}
.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(22,163,74,0.15);
}
.alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(217,119,6,0.15);
}
.alert-info {
    background: var(--info-bg);
    color: var(--info);
    border: 1px solid rgba(37,99,235,0.15);
}

/* ===== 信息展示 ===== */
.info-box {
    background: #f8fafc;
    border-radius: var(--radius);
    padding: var(--space-4);
}
.info-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    font-size: 0.875rem;
}
.info-item + .info-item {
    border-top: 1px solid var(--border);
}
.info-label {
    color: var(--text-secondary);
}
.info-value {
    font-weight: 500;
    color: var(--text-primary);
}

/* ===== 结果展示 ===== */
.result-card {
    background: #f8fafc;
    border-radius: var(--radius);
    padding: var(--space-5);
}
.result-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    font-size: 0.875rem;
}
.result-row + .result-row {
    border-top: 1px solid var(--border);
}
.result-label {
    color: var(--text-secondary);
}
.result-value {
    font-weight: 500;
}

/* ===== 接口选择 ===== */
.interface-select {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.interface-option {
    cursor: pointer;
}
.interface-option input {
    display: none;
}
.interface-card {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}
.interface-option input:checked + .interface-card {
    border-color: var(--primary);
    background: var(--primary-light);
}
.interface-icon {
    font-size: 1.5rem;
}
.interface-name {
    font-weight: 500;
}

/* ===== 链接结果 ===== */
.result-box {
    margin-top: var(--space-4);
}
.result-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-3) var(--space-4);
    margin-top: var(--space-2);
}
.result-link code {
    flex: 1;
    font-size: 0.8125rem;
    color: var(--primary);
    word-break: break-all;
    font-family: var(--font-mono);
}
.result-preview {
    background: #f8fafc;
    border-radius: var(--radius);
    padding: var(--space-4);
    margin-top: var(--space-2);
}
.preview-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    font-size: 0.875rem;
}
.preview-item + .preview-item {
    border-top: 1px solid var(--border);
}
.preview-label {
    color: var(--text-secondary);
}
.preview-value {
    font-weight: 500;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .navbar-links { display: none; }
    .navbar-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--card);
        border-bottom: 1px solid var(--border);
        padding: var(--space-4);
        box-shadow: var(--card-shadow);
    }
    .navbar-toggle { display: flex; }
    .navbar-actions .btn { display: none; }

    .admin-sidebar {
        width: 100%;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: var(--space-4);
    }
    .admin-main { margin-left: 0; padding: var(--space-4); }
    .admin-layout { flex-direction: column; }
    .admin-nav { flex-direction: row; overflow-x: auto; padding-bottom: var(--space-2); }
    .admin-nav a { white-space: nowrap; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .auth-card, .login-card { padding: var(--space-6); }
    .search-box input { width: 160px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .action-bar { flex-direction: column; align-items: stretch; }
    .action-bar-left, .action-bar-right { width: 100%; }
    .search-box input { width: 100%; }
    .hero-title { font-size: 1.75rem; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { flex-direction: column; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.w-full { width: 100%; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }