/* ==========================================
   Token Platform - Website Styles v2.0
   主色调: 支付宝蓝 #1677FF + 纯白 #FFFFFF
   风格: 大气科技感，无渐变，浅色主题
   ========================================== */

/* ===== CSS 变量（设计令牌） ===== */
:root {
    /* 品牌色 */
    --primary: #1677FF;
    --primary-hover: #0958D9;
    --primary-active: #003EB3;
    --primary-light: #E6F4FF;
    --primary-bg: #F0F7FF;
    --primary-border: #91CAFF;

    /* 语义色 */
    --success: #00B578;
    --success-light: #E8F8F0;
    --success-border: #7BE0B6;
    --warning: #FF8F1F;
    --warning-light: #FFF3E8;
    --warning-border: #FFCB8A;
    --danger: #FF3B30;
    --danger-light: #FFEDED;
    --danger-border: #FF9B94;
    --info: #1677FF;
    --info-light: #E6F4FF;

    /* 中性色 */
    --white: #FFFFFF;
    --gray-50: #F7F8FA;
    --gray-100: #F2F3F5;
    --gray-200: #E8ECF0;
    --gray-300: #D9DDE4;
    --gray-400: #C4C9D4;
    --gray-500: #9CA3AF;
    --gray-600: #6B7280;
    --gray-700: #4B5563;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* 圆角 */
    --radius-sm: 4px;
    --radius: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 1px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 32px rgba(0,0,0,0.16);

    /* 过渡 */
    --transition: all 0.25s ease;
    --transition-fast: all 0.15s ease;
}

/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px !important;
    margin: 0 auto;
    padding: 0 20px;
}

/* 防止移动端横向滚动 */
html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

/* 移动端全屏导航遮罩 */
.mobile-nav-overlay {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    z-index: 999;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    animation: mobileNavSlide 0.2s ease-out;
}
@keyframes mobileNavSlide {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
.mobile-nav-links {
    padding: 8px 0;
}
.mobile-nav-links .nav-link,
.mobile-nav-links .nav-dropdown {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 14px 20px;
    font-size: 16px;
    font-weight: 500;
    color: var(--gray-700);
    text-decoration: none;
    border-bottom: 1px solid var(--gray-100);
    transition: background 0.15s;
}
.mobile-nav-links .nav-link:hover,
.mobile-nav-links .nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
}

/* 移动端下拉菜单操作按钮 */
.mobile-nav-actions {
    padding: 14px 20px 4px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.mobile-nav-action-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.15s;
}
.mobile-nav-action-btn.primary {
    background: var(--primary);
    color: #fff;
}
.mobile-nav-action-btn.primary:hover {
    background: var(--primary-hover);
    color: #fff;
}
.mobile-nav-action-btn.secondary {
    background: var(--white);
    color: var(--primary);
    border: 1.5px solid var(--primary);
}
.mobile-nav-action-btn.secondary:hover {
    background: var(--primary-light);
}
:root[data-theme="dark"] .mobile-nav-action-btn.secondary {
    background: var(--dark-bg);
}


/* ===========================================
   1. 顶部导航栏 — 白色毛玻璃
   =========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 72px;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    z-index: 1000;
    transition: var(--transition);
    will-change: transform;
}

.navbar.scrolled {
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
    border-bottom-color: rgba(0, 0, 0, 0.04);
}

.navbar .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

.navbar-brand img {
    height: 40px;
}

.navbar-nav-group {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    min-width: 0;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0;
    flex-shrink: 0;
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    cursor: pointer;
    display: flex;
    align-items: center;
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 1001;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-decoration: none;
}

.nav-dropdown-item i {
    font-size: 14px;
    color: var(--gray-400);
    width: 18px;
    text-align: center;
}

.nav-dropdown-item:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-dropdown-item:hover i {
    color: var(--primary);
}

.nav-dropdown-item.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-dropdown-divider {
    height: 1px;
    background: var(--gray-200);
    margin: 4px 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: 8px;
    transition: all 0.2s ease;
    white-space: nowrap;
    text-decoration: none;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(22, 119, 255, 0.08);
}

.nav-link.active {
    color: var(--primary);
    font-weight: 600;
    position: relative;
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

:root[data-theme="dark"] .nav-link:hover {
    background: rgba(22, 119, 255, 0.12);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-login-btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: var(--primary);
    border-radius: 8px;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.2s ease;
}
.nav-login-btn:hover {
    background: var(--primary-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(22, 119, 255, 0.35);
}

:root[data-theme="dark"] .nav-login-btn {
    background: var(--primary);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* 登录按钮：品牌蓝底白字 */
.btn-login {
    padding: 9px 22px;
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    background: var(--primary);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-login:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

/* 注册按钮：白底品牌蓝边框 */
.btn-register {
    padding: 9px 22px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    background: var(--white);
    border: 1.5px solid var(--primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.btn-register:hover {
    background: var(--primary-light);
    border-color: var(--primary-hover);
    color: var(--primary-hover);
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

/* 移动端专用登录按钮，PC端隐藏 */
.mobile-nav-login-btn {
    display: none;
}

/* ===========================================
   2. Hero 区域 — 浅色/白色背景
   =========================================== */
.hero {
    padding: 140px 0 60px;
    margin-top: -72px; /* 吸收nav-spacer */
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.models-header {
    background: var(--primary);
    padding: 120px 0 60px;
    margin-top: -72px;
}

.free-models-header {
    background: linear-gradient(135deg, #059669 0%, #10B981 50%, #34D399 100%);
    padding: 120px 0 60px;
    margin-top: -72px;
}

/* 微妙的装饰圆点背景 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(var(--gray-200) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.5;
}

.hero .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: var(--primary-light);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-full);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    color: var(--gray-800);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-title span {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

/* CTA主按钮：品牌蓝底白字 */
.btn-hero-primary {
    padding: 16px 36px;
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    background: var(--primary);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-hero-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(22, 119, 255, 0.35);
}

/* CTA次要按钮：白底品牌蓝边 */
.btn-hero-secondary {
    padding: 16px 36px;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    background: var(--white);
    border: 2px solid var(--primary-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-hero-secondary:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--gray-200);
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
}

.hero-stat-label {
    font-size: 14px;
    color: var(--gray-500);
    margin-top: 4px;
}

/* ===========================================
   3. 通用区块
   =========================================== */
.section {
    padding: 60px 0;
}

.section-alt {
    background: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary);
    color: var(--white);
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===========================================
   4. 特性区 / 模型卡片网格
   =========================================== */
.model-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.model-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition);
}

.model-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-border);
}

.model-card-header {
    padding: 24px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.model-provider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.model-provider-logo {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.model-provider-name {
    font-size: 13px;
    color: var(--gray-500);
}

.model-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.model-description {
    font-size: 14px;
    color: var(--gray-500);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.6;
}

.model-card-body {
    padding: 20px 24px;
}

.model-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.model-tag {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    background: var(--gray-100);
    color: var(--gray-600);
    border-radius: var(--radius-sm);
}

.model-tag.hot {
    background: var(--warning-light);
    color: var(--warning);
}

.model-tag.new {
    background: var(--success-light);
    color: var(--success);
}

.model-stats {
    display: flex;
    align-items: center;
    gap: 20px;
}

.model-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--gray-500);
}

.model-stat i {
    font-size: 14px;
}

.model-card-footer {
    padding: 14px 20px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

/* ---- 价格区域 ---- */
.model-price-area {
    flex: 1;
    min-width: 0;
}

.price-row {
    display: flex;
    align-items: baseline;
    gap: 6px;
    line-height: 1.6;
}

.price-row + .price-row {
    margin-top: 1px;
}

.price-label {
    font-size: 11px;
    color: var(--gray-400);
    white-space: nowrap;
    min-width: 24px;
}

.price-val {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.02em;
}

.price-val small {
    font-size: 11px;
    font-weight: 500;
    color: var(--gray-400);
    margin-left: 1px;
}

/* 节省标签 - 紧凑内联 */
.price-save {
    display: inline-flex;
    align-items: center;
    font-size: 10px;
    font-weight: 600;
    color: #059669;
    background: #ECFDF5;
    padding: 0 5px;
    border-radius: 4px;
    line-height: 18px;
    white-space: nowrap;
    margin-left: 4px;
}

.price-save--output {
    color: #2563EB;
    background: #EFF6FF;
}

/* 官方价格行 */
.price-official-row {
    font-size: 11px;
    color: var(--gray-400);
    margin-top: 2px;
    text-decoration: line-through;
}

/* ---- 兼容旧类名 ---- */
.model-price {
    font-size: 14px;
    color: var(--gray-500);
}

.model-price strong {
    font-size: 18px;
    color: var(--primary);
    font-weight: 700;
}

.model-price span {
    font-size: 12px;
}

/* 折扣标签 - 模型卡片（旧样式兼容） */
.discount-badge {
    display: inline-block;
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    font-size: 10px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 10px;
    margin-bottom: 2px;
    line-height: 1.4;
}

.price-original {
    font-size: 11px;
    color: var(--gray-400);
    text-decoration: line-through;
    margin-top: 2px;
}

/* 折扣标签 - 详情弹窗 */
.discount-badge-lg {
    display: inline-block;
    background: linear-gradient(135deg, #10B981, #059669);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 12px;
    margin-left: 8px;
    line-height: 1.4;
}

.discount-badge-lg.premium {
    background: linear-gradient(135deg, #EF4444, #DC2626);
}

.price-official {
    font-size: 12px;
    color: var(--gray-400);
    text-decoration: line-through;
    margin-left: 8px;
}

.price-detail {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

.price-current {
    line-height: 1.4;
}

.price-current strong {
    font-size: 18px;
    color: var(--primary);
    font-weight: 700;
}

.price-current span {
    font-size: 12px;
    color: var(--gray-500);
}

.price-discount {
    margin-bottom: 2px;
}

.btn-view-model {
    padding: 7px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-view-model:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

/* ===========================================
   5. 套餐卡片
   =========================================== */
.package-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.package-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.package-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.package-card.featured {
    border: 2px solid var(--primary);
}

.package-card.featured::before {
    content: '热门推荐';
    position: absolute;
    top: 16px;
    right: -32px;
    padding: 6px 40px;
    background: var(--primary);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    transform: rotate(45deg);
}

.package-header {
    padding: 28px;
    background: var(--gray-50);
    text-align: center;
    border-bottom: 1px solid var(--gray-200);
}

.package-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.package-model {
    font-size: 14px;
    color: var(--gray-500);
}

.package-price {
    padding: 24px 28px;
    text-align: center;
    border-bottom: 1px solid var(--gray-100);
}

.package-price-original {
    font-size: 16px;
    color: var(--gray-400);
    text-decoration: line-through;
    margin-bottom: 4px;
}

.package-price-current {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.package-price-current .currency {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-800);
}

.package-price-current .amount {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary);
}

.package-price-current .period {
    font-size: 14px;
    color: var(--gray-500);
}

.package-features {
    padding: 24px 28px;
}

.package-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 14px;
    color: var(--gray-600);
}

.package-feature i {
    width: 20px;
    color: var(--success);
    flex-shrink: 0;
}

.package-feature.disabled {
    color: var(--gray-400);
}

.package-feature.disabled i {
    color: var(--gray-300);
}

.package-footer {
    padding: 20px 28px 28px;
}

.btn-buy-package {
    width: 100%;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    color: var(--white);
    background: var(--primary);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
}

.btn-buy-package:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(22, 119, 255, 0.35);
}

/* ===========================================
   6. 教程卡片
   =========================================== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 24px;
}

.article-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-border);
}

.article-cover {
    height: 180px;
    background: var(--primary-light);
    position: relative;
    overflow: hidden;
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-category {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 6px 12px;
    background: var(--primary);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.article-content {
    padding: 20px;
}

.article-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: var(--transition);
}

.article-title:hover {
    color: var(--primary);
}

.article-excerpt {
    font-size: 14px;
    color: var(--gray-500);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
    line-height: 1.6;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--gray-400);
}

.article-meta i {
    margin-right: 6px;
}

/* ===========================================
   7. 下载中心
   =========================================== */
.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.download-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    min-width: 0;
    overflow: hidden;
}
.download-info {
    min-width: 0;
    overflow: hidden;
}

.download-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-border);
}

.download-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.download-info {
    flex: 1;
    min-width: 0;
}

.download-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.download-meta {
    font-size: 13px;
    color: var(--gray-500);
}

.download-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--primary);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.download-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

/* ===========================================
   8. Footer — 浅色背景
   =========================================== */

.nav-icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
    background: transparent;
    color: var(--gray-600);
    font-size: 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.nav-icon-btn:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.lang-switch {
    position: relative;
}
.lang-dropdown {
    display: none;
    position: absolute;
    top: 44px;
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    z-index: 1001;
    min-width: 100px;
}
.lang-option {
    display: block;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition);
}
.lang-option:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.lang-option.active {
    color: var(--primary);
    font-weight: 600;
}

.footer {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    color: var(--gray-800);
    padding: 48px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 32px;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo img {
    height: 36px;
}

.footer-desc {
    font-size: 13px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--gray-100);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    font-size: 14px;
    text-decoration: none;
}

.footer-social-icon:hover {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.footer-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 14px;
    color: var(--gray-500);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--gray-400);
}

.footer-legal {
    display: flex;
    gap: 20px;
}

.footer-legal a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
}

.footer-legal a:hover {
    color: var(--primary);
}

/* ===========================================
   9. 筛选栏
   =========================================== */
.filter-section {
    background: var(--white);
    padding: 20px 0;
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 30px;
}

.filter-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-size: 14px;
    color: var(--gray-600);
    white-space: nowrap;
    font-weight: 500;
}

.filter-group select,
.filter-group input {
    padding: 8px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    font-size: 14px;
    outline: none;
    min-width: 160px;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-800);
}

.filter-group select:focus,
.filter-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 119, 255, 0.1);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.filter-tag {
    padding: 6px 16px;
    font-size: 13px;
    color: var(--gray-600);
    background: var(--gray-100);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    font-weight: 500;
}

.filter-tag:hover {
    color: var(--primary);
    border-color: var(--primary-border);
    background: var(--primary-light);
}

.filter-tag.active {
    color: var(--white);
    background: var(--primary);
    border-color: var(--primary);
}

/* ===========================================
   10. 文章详情
   =========================================== */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 100px 20px 60px;
}

.article-detail-header {
    margin-bottom: 40px;
}

.article-detail-category {
    display: inline-block;
    padding: 6px 14px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
}

.article-detail-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1.4;
    margin-bottom: 20px;
}

.article-detail-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 14px;
    color: var(--gray-500);
}

.article-detail-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-detail-cover {
    width: 100%;
    border-radius: var(--radius-xl);
    margin-bottom: 40px;
    overflow: hidden;
}

.article-detail-cover img {
    width: 100%;
    display: block;
}

.article-detail-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--gray-700);
    border-radius: 8px;

.article-detail-content h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--gray-800);
    margin: 40px 0 20px;
}

.article-detail-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-800);
    margin: 30px 0 16px;
}

.article-detail-content p {
    margin-bottom: 20px;
}

.article-detail-content ul,
.article-detail-content ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.article-detail-content li {
    margin-bottom: 8px;
}

.article-detail-content pre {
    background: var(--gray-800);
    color: #f0f0f0;
    padding: 20px;
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin-bottom: 20px;
}

.article-detail-content code {
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 14px;
}

.article-detail-content img {
    max-width: 100%;
    border-radius: var(--radius-md);
    margin: 20px 0;
}

.article-detail-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 20px;
    margin: 20px 0;
    color: var(--gray-600);
    font-style: italic;
    background: var(--primary-light);
    padding: 16px 20px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ===========================================
   11. 分页
   =========================================== */

.page-item {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    background: var(--white);
    font-weight: 500;
}

.page-item:hover {
    background: var(--primary-light);
    border-color: var(--primary-border);
    color: var(--primary);
}

.page-item.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.page-item.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ---- 分页组件（TP.Pagination） ---- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 40px;
}

.pagination-item {
    min-width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 14px;
    color: #374151;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid #E5E7EB;
    background: #fff;
    font-weight: 500;
    padding: 0 10px;
    gap: 4px;
}

.pagination-item:not(.disabled):hover {
    border-color: #1677FF;
    color: #1677FF;
    background: #F0F7FF;
}

.pagination-item.active {
    background: #1677FF;
    color: #fff;
    border-color: #1677FF;
}
.pagination-item.active:hover {
    background: #0958D9;
    color: #fff;
}

.pagination-item.disabled {
    opacity: 1;
    cursor: default;
    color: #9CA3AF;
    padding: 0 4px;
}

.pagination-info {
    font-size: 13px;
    color: #9CA3AF;
    margin-left: 8px;
    white-space: nowrap;
}

:root[data-theme="dark"] .pagination-item {
    background: #1F2937;
    border-color: #374151;
    color: #D1D5DB;
}
:root[data-theme="dark"] .pagination-item:not(.disabled):hover {
    border-color: #1677FF;
    color: #1677FF;
    background: rgba(22, 119, 255, 0.1);
}
:root[data-theme="dark"] .pagination-item.active {
    background: #1677FF;
    color: #fff;
    border-color: #1677FF;
}
:root[data-theme="dark"] .pagination-item.disabled {
    color: #6B7280;
}
:root[data-theme="dark"] .pagination-info {
    color: #6B7280;
}

@media (max-width: 480px) {
    .pagination-item {
        min-width: 36px;
        height: 36px;
        font-size: 13px;
        padding: 0 8px;
    }
    .pagination-info {
        width: 100%;
        text-align: center;
        margin-left: 0;
        margin-top: 12px;
    }
}

/* ===========================================
   12. 空状态
   =========================================== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
}

.empty-state-icon {
    font-size: 80px;
    color: var(--gray-300);
    margin-bottom: 24px;
}

.empty-state-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.empty-state-text {
    font-size: 15px;
    color: var(--gray-500);
}

/* ===========================================
   13. 通用按钮样式
   =========================================== */

/* 主要按钮：白字+品牌蓝背景 */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--white);
    background: var(--primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.btn-primary:active {
    background: var(--primary-active);
    transform: translateY(0);
}

/* 次要按钮：品牌蓝字+白底+品牌蓝边框 */
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    background: var(--white);
    border: 1.5px solid var(--primary-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary-hover);
}

.btn-secondary:active {
    background: var(--primary-light);
    border-color: var(--primary-hover);
}

/* 文字按钮 */
.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-text:hover {
    background: var(--primary-light);
    border-radius: var(--radius-md);
}

/* ===========================================
   14. 特性卡片（Feature Cards）
   =========================================== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 32px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ===========================================
   15. 定价表格（Pricing Table）
   =========================================== */
.pricing-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.pricing-table thead th {
    padding: 16px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    text-align: left;
}

.pricing-table tbody td {
    padding: 16px 20px;
    font-size: 14px;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
}

.pricing-table tbody tr:last-child td {
    border-bottom: none;
}

.pricing-table tbody tr:hover {
    background: var(--primary-light);
}

.pricing-table .price {
    font-weight: 700;
    color: var(--primary);
}

.pricing-table .recommended {
    background: var(--primary-light);
    border-left: 3px solid var(--primary);
}

/* ===========================================
   16. CTA 区域
   =========================================== */
.cta-section {
    padding: 60px 0;
    background: var(--primary-light);
    text-align: center;
}

.cta-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 16px;
}

.cta-desc {
    font-size: 18px;
    color: var(--gray-500);
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

/* ===========================================
   17. 响应式设计
   =========================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-brand {
        grid-column: span 2;
        max-width: none;
    }

    .feature-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 1024px) {
    .navbar-brand span {
        display: none;
    }

    .navbar-brand {
        gap: 0;
    }

    /* 移动端下拉菜单展开 */
    .nav-dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        padding: 0 0 0 16px;
        background: transparent;
        display: none;
    }

    .nav-dropdown.open .nav-dropdown-menu {
        display: block;
    }

    .nav-dropdown-toggle {
        width: 100%;
        justify-content: center;
    }

    .navbar {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
        background: rgba(255, 255, 255, 0.95) !important;
    }

    .navbar .container {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 16px !important;
        height: 72px !important;
        box-sizing: border-box !important;
        overflow: visible !important;
        min-width: 0 !important;
    }

    .navbar-nav {
        display: none !important;
    }

    #navbar-nav-group,
    .navbar-nav-group,
    #navbar-nav-left,
    #navbar-nav-right,
    .navbar-nav-left,
    .navbar-nav-right {
        display: none !important;
    }

    .navbar-brand {
        position: static !important;
        flex-shrink: 0 !important;
    }

    .navbar-actions {
        display: none !important;
    }

    .navbar-right {
        display: flex !important;
        align-items: center !important;
        gap: 8px !important;
        flex-shrink: 0 !important;
    }

    .mobile-menu-btn {
        display: flex !important;
        position: static !important;
        flex-shrink: 0 !important;
        margin-left: 0 !important;
    }

    /* 移动端隐藏语言切换下拉 */
    .lang-switch {
        display: none !important;
    }

    .nav-icon-btn {
        width: 36px !important;
        height: 36px !important;
        font-size: 16px !important;
    }

    /* 移动端header里的登录按钮（独立于navbar-actions） */
    .mobile-nav-login-btn {
        display: inline-flex !important;
        align-items: center;
        padding: 7px 12px !important;
        font-size: 13px !important;
        font-weight: 600;
        color: #fff !important;
        background: var(--primary) !important;
        border-radius: 8px !important;
        text-decoration: none !important;
        white-space: nowrap !important;
    }
    .mobile-nav-login-btn:hover {
        background: var(--primary-hover) !important;
        color: #fff !important;
    }

    /* 移动端导航：所有导航项都放到汉堡菜单 */

    .btn-login,
    .btn-register {
        padding: 6px 8px !important;
        font-size: 12px !important;
        white-space: nowrap !important;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }

    .hero-stat-value {
        font-size: 28px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn-hero-primary,
    .btn-hero-secondary {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: 12px 16px !important;
        font-size: 14px !important;
        white-space: nowrap;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .model-grid,
    .package-grid,
    .article-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .download-grid {
        grid-template-columns: 1fr;
    }

    .download-card {
        padding: 16px;
        gap: 12px;
    }
    .download-card a {
        min-width: 0;
        overflow: hidden;
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .download-icon {
        width: 44px;
        height: 44px;
        font-size: 20px;
        flex-shrink: 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-col {
        display: none;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .footer-legal {
        flex-wrap: wrap;
        justify-content: center;
    }

    .article-detail-title {
        font-size: 24px;
    }

    .article-detail-meta {
        flex-wrap: wrap;
        gap: 12px;
    }

    .cta-title {
        font-size: 24px;
    }

    .cta-desc {
        font-size: 16px;
    }

    .cta-actions {
        flex-direction: column;
    }

    .pricing-table {
        display: block;
        overflow-x: auto;
    }

    .filter-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .filter-group {
        width: 100%;
    }

    .filter-group select,
    .filter-group input {
        width: 100%;
        min-width: 0;
    }

    .filter-section {
        padding: 16px 0;
        margin-bottom: 20px;
    }

    .filter-row .btn {
        width: 100%;
    }

    .pagination {
        flex-wrap: wrap;
    }

    .package-card.featured::before {
        display: none;
    }

    /* 套餐卡片移动端优化 */
    .package-header {
        padding: 20px;
    }
    .package-name {
        font-size: 18px;
    }
    .package-model {
        font-size: 13px;
    }
    .package-price {
        padding: 16px 20px;
    }
    .package-price-original {
        font-size: 14px;
    }
    .package-price-current .amount {
        font-size: 36px;
    }
    .package-price-current .currency {
        font-size: 18px;
    }
    .package-features {
        padding: 16px 20px;
    }
    .package-feature {
        padding: 8px 0;
        font-size: 13px;
    }
    .package-footer {
        padding: 16px 20px 24px;
    }
    .btn-buy-package {
        padding: 12px;
        font-size: 14px;
    }

    /* 定价表移动端 */
    .pricing-hero-title {
        font-size: 24px;
    }
    .pricing-hero-desc {
        font-size: 14px;
    }

    /* 成本计算器移动端 */
    .pricing-calc-card {
        padding: 16px !important;
    }
    .pricing-calc-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }

    .hero-subtitle {
        font-size: 15px;
    }

    .hero-stats {
        gap: 16px;
    }

    .hero-stat-value {
        font-size: 24px;
    }

    .section-title {
        font-size: 24px;
    }

    .container {
        padding: 0 16px;
    }
}

/* ===========================================
   18. 动画
   =========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.5s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* ===========================================
   19. 移动端全面适配覆盖
   =========================================== */

/* --- 平板 (≤1024px) --- */
@media (max-width: 1024px) {
    /* 关于页/联系页/供应商页 固定3列→2列 */
    .about-features-grid,
    .contact-info-grid,
    .supplier-benefits-grid,
    .supplier-steps-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* 首页统计4列→2列 */
    .home-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* 供应商入驻优势3列→2列 */
    .supplier-features-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* 文档中心侧边栏收窄 */
    .docs-body {
        grid-template-columns: 200px 1fr !important;
        gap: 20px !important;
    }
}

/* --- 手机 (≤768px) --- */
@media (max-width: 768px) {
    /* 通用：所有固定多列grid → 单列 */
    .about-features-grid,
    .contact-info-grid,
    .supplier-benefits-grid,
    .supplier-steps-grid,
    .supplier-features-grid,
    .supplier-data-grid,
    .supplier-compare-grid {
        grid-template-columns: 1fr !important;
    }

    /* 首页统计4列→2列 */
    .home-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* 首页介绍区2列→单列 */
    .home-intro-grid {
        grid-template-columns: 1fr !important;
    }

    /* 模型详情统计卡片 */
    .detail-stats {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* 模型广场筛选栏 */
    .filter-bar {
        flex-direction: column !important;
    }
    .filter-bar .filter-group {
        width: 100% !important;
    }
    .filter-bar .filter-group select,
    .filter-bar .filter-group input {
        width: 100% !important;
        min-width: 0 !important;
    }

    /* 文档中心：侧边栏隐藏，全宽 */
    .docs-body {
        grid-template-columns: 1fr !important;
    }
    .docs-sidebar {
        display: none !important;
    }
    .docs-sidebar.mobile-open {
        display: block !important;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        z-index: 9999;
        background: #fff;
        padding: 20px;
        overflow-y: auto;
    }

    /* 文档卡片网格 */
    .doc-grid {
        grid-template-columns: 1fr !important;
    }

    /* 模型详情供应商表格横向滚动 */
    .supplier-table-wrap {
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch;
    }
    .supplier-table-wrap table {
        min-width: 700px;
    }

    /* 免费模型统计卡片 */
    .free-stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* 模型详情头部 */
    .model-header-flex {
        flex-direction: column !important;
        align-items: flex-start !important;
    }
    .model-price-bar {
        flex-direction: column !important;
        align-items: flex-start !important;
    }

    /* Playground */
    .playground-layout {
        grid-template-columns: 1fr !important;
    }
    .playground-sidebar {
        max-height: 300px;
        overflow-y: auto;
    }

    /* 供应商入驻表单 */
    .supplier-apply-form-grid {
        grid-template-columns: 1fr !important;
    }

    /* 首页双栏区块 */
    .home-two-col {
        grid-template-columns: 1fr !important;
    }

    /* 模型广场详情弹窗 */
    .model-detail-modal {
        width: 95vw !important;
        max-height: 90vh !important;
    }
    .model-detail-stats {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    /* 代码示例弹窗 */
    #code-modal-overlay > div {
        max-width: 95vw !important;
        max-height: 90vh !important;
    }

    /* 通用section间距 */
    .section {
        padding: 40px 0 !important;
    }

    /* 按钮组横排→竖排 */
    .btn-group-mobile-stack {
        flex-direction: column !important;
    }
    .btn-group-mobile-stack .btn {
        width: 100% !important;
    }
}

/* --- 小屏手机 (≤480px) --- */
@media (max-width: 480px) {
    .home-stats-grid {
        grid-template-columns: 1fr !important;
    }
    .free-stats-grid {
        grid-template-columns: 1fr !important;
    }
    .detail-stats,
    .model-detail-stats {
        grid-template-columns: 1fr !important;
    }

    .hero-title {
        font-size: 24px !important;
    }

    /* 表格字号缩小 */
    .supplier-table-wrap table {
        font-size: 12px;
    }
    .supplier-table-wrap table th,
    .supplier-table-wrap table td {
        padding: 10px 8px !important;
    }
}