/* ========================================
   91 修车改装 - 主样式文件
   原创配色：深炭黑 + 炽橙 + 冷钢蓝
   ======================================== */

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

:root {
    --primary: #FF6B00;       /* 炽橙 - 品牌主色 */
    --secondary: #1A2A3A;     /* 深海蓝 - 背景色 */
    --dark: #0D1117;          /* 深炭黑 */
    --steel: #2E4057;         /* 钢铁蓝 */
    --light: #F5F7FA;         /* 浅灰白 */
    --white: #FFFFFF;
    --text: #2C3E50;
    --muted: #7F8C8D;
    --border: #E0E6ED;
    --accent: #00C9FF;        /* 冷蓝高光 */
    --gradient-hero: linear-gradient(135deg, #0D1117 0%, #1A2A3A 50%, #2E4057 100%);
    --gradient-orange: linear-gradient(135deg, #FF6B00, #FF9A44);
    --shadow-card: 0 8px 32px rgba(0,0,0,0.12);
    --shadow-hover: 0 16px 48px rgba(0,0,0,0.2);
    --radius: 12px;
    --radius-sm: 6px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.7;
    font-size: 16px;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: #e55a00;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   头部导航
   ======================================== */
.site-header {
    background: var(--dark);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
}

.logo .brand-name {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: -1px;
    text-shadow: 0 0 20px rgba(255,107,0,0.5);
    font-style: italic;
}

.logo a {
    color: inherit;
}

.main-nav ul {
    display: flex;
    gap: 8px;
    align-items: center;
}

.main-nav ul li a {
    color: #ccc;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.main-nav ul li a:hover {
    color: var(--white);
    background: var(--primary);
}

/* 汉堡菜单按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: 2px solid rgba(255,255,255,0.3);
    color: var(--white);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.menu-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Logo图片 */
.logo-img {
    width: 150px;
    height: auto;
    display: inline-block;
    vertical-align: middle;
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 搜索栏 */
.search-bar-container {
    background: var(--secondary);
    padding: 10px 0;
    border-top: 1px solid rgba(255,255,255,0.05);
}

.search-box {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
    gap: 8px;
}

.search-box input {
    flex: 1;
    padding: 10px 18px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 30px;
    background: rgba(255,255,255,0.08);
    color: var(--white);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.search-box input::placeholder {
    color: rgba(255,255,255,0.4);
}

.search-box input:focus {
    border-color: var(--primary);
    background: rgba(255,255,255,0.12);
}

.search-box button {
    padding: 10px 24px;
    background: var(--gradient-orange);
    color: var(--white);
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.search-box button:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(255,107,0,0.4);
}

/* 面包屑 */
.breadcrumb {
    background: var(--light);
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--muted);
}

.breadcrumb a {
    color: var(--muted);
}

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

/* 关键词标签云 */
.keyword-cloud {
    background: var(--secondary);
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    overflow-x: auto;
    white-space: nowrap;
}

.keyword-cloud .container {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.keyword-cloud a {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(255,107,0,0.12);
    color: rgba(255,255,255,0.7);
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.keyword-cloud a:hover {
    background: var(--primary);
    color: var(--white);
}

/* ========================================
   Hero Banner
   ======================================== */
.hero-banner {
    position: relative;
    min-height: 600px;
    background: var(--gradient-hero);
    overflow: hidden;
    display: flex;
    align-items: center;
}

.hero-banner .hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.35;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 80px 0;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content h1 span {
    color: var(--primary);
    display: block;
}

.hero-content p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.8);
    max-width: 600px;
    margin-bottom: 32px;
}

.hero-badges {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.badge {
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-orange {
    background: var(--primary);
    color: var(--white);
}

.badge-outline {
    border: 2px solid rgba(255,255,255,0.4);
    color: var(--white);
}

.hero-stats {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

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

.stat-item .num {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--primary);
    display: block;
}

.stat-item .label {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
}

/* Hero h1样式 */
.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.brand-h1 {
    color: var(--primary);
    font-style: italic;
}

.hero-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: rgba(255,255,255,0.8);
    margin-top: 8px;
}

.hero-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
    max-width: 640px;
    margin-bottom: 28px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

/* ========================================
   通用区块
   ======================================== */
.section {
    padding: 80px 0;
}

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

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

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

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-dark .section-header h2 {
    color: var(--white);
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-orange);
    margin: 12px auto 0;
    border-radius: 2px;
}

.section-header p {
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

.section-dark .section-header p {
    color: rgba(255,255,255,0.6);
}

/* ========================================
   视频卡片
   ======================================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.video-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    cursor: pointer;
}

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

.video-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: var(--dark);
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.05);
}

.play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    opacity: 0;
    transition: var(--transition);
}

.video-card:hover .play-btn {
    opacity: 1;
}

.play-icon {
    width: 60px;
    height: 60px;
    background: rgba(255,107,0,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.8);
    transition: var(--transition);
}

.video-card:hover .play-icon {
    transform: scale(1);
}

.play-icon::after {
    content: '';
    border-left: 22px solid white;
    border-top: 14px solid transparent;
    border-bottom: 14px solid transparent;
    margin-left: 5px;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.75);
    color: var(--white);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.video-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--primary);
    color: var(--white);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.video-info {
    padding: 16px;
}

.video-info h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--muted);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 娱乐专区 */
.entertainment-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 16px;
}

.ent-card-large {
    grid-row: span 2;
}

.ent-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    min-height: 200px;
}

.ent-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    display: block;
}

.ent-card:hover img {
    transform: scale(1.05);
}

.ent-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 60%, transparent 100%);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    color: var(--white);
}

.ent-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: var(--primary);
    color: var(--white);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
}

.ent-overlay h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.ent-overlay p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 12px;
    line-height: 1.5;
}

/* 社区模块 */
.community-modules {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}

.comm-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.comm-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.comm-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
}

.comm-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
}

.comm-card p {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.7;
    margin-bottom: 14px;
}

.comm-link {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
}

.comm-link:hover {
    color: #e55a00;
}

/* Footer Logo行 */
.footer-logo-row {
    display: flex;
    align-items: center;
    gap: 20px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 40px;
}

.footer-logo {
    width: 150px;
    height: auto;
}

.footer-slogan {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

.footer-col a {
    color: rgba(255,255,255,0.6);
}

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

/* 面包屑ol */
.breadcrumb ol {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.breadcrumb ol li::after {
    content: '›';
    margin-left: 8px;
    color: var(--muted);
}

.breadcrumb ol li:last-child::after {
    display: none;
}

/* ========================================
   功能模块卡片
   ======================================== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    border-top: 4px solid transparent;
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(255,107,0,0.1), rgba(255,107,0,0.2));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.6;
}

/* ========================================
   专家展示
   ======================================== */
.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}

.expert-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.expert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.expert-photo {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.expert-info {
    padding: 20px;
}

.expert-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}

.expert-role {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.expert-bio {
    font-size: 0.875rem;
    color: var(--muted);
    margin-bottom: 12px;
    line-height: 1.6;
}

.expert-awards {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 14px;
}

.award-tag {
    background: rgba(255,107,0,0.1);
    color: var(--primary);
    padding: 3px 10px;
    border-radius: 30px;
    font-size: 0.78rem;
    font-weight: 600;
}

.expert-actions {
    display: flex;
    gap: 10px;
}

.btn-sm {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background: #e55a00;
    color: var(--white);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

/* ========================================
   合作品牌Logo墙
   ======================================== */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: center;
}

.partner-item {
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 28px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--muted);
    transition: var(--transition);
    min-width: 120px;
    text-align: center;
}

.partner-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: scale(1.05);
}

/* ========================================
   用户评价
   ======================================== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.review-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-card);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.review-stars {
    color: #FFB800;
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.review-text {
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.7;
    margin-bottom: 16px;
    font-style: italic;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-orange);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.review-author-info .name {
    font-weight: 700;
    color: var(--text);
    font-size: 0.9rem;
}

.review-author-info .date {
    font-size: 0.8rem;
    color: var(--muted);
}

/* ========================================
   FAQ
   ======================================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.faq-question {
    background: var(--white);
    padding: 18px 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 700;
    color: var(--text);
    font-size: 1rem;
    border: none;
    width: 100%;
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(255,107,0,0.05);
}

.faq-question.active {
    background: var(--primary);
    color: var(--white);
}

.faq-arrow {
    font-size: 1.2rem;
    transition: transform 0.3s;
}

.faq-question.active .faq-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    background: var(--light);
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    font-size: 0.95rem;
    color: var(--muted);
    line-height: 1.7;
}

.faq-answer.open {
    max-height: 300px;
    padding: 16px 24px;
}

/* ========================================
   联系我们
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text);
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 44px;
    height: 44px;
    background: rgba(255,107,0,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-item-text .label {
    font-size: 0.8rem;
    color: var(--muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-item-text .value {
    font-size: 1rem;
    color: var(--text);
    font-weight: 600;
}

.shop-photo {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.shop-photo img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

/* ========================================
   How-To加入社区
   ======================================== */
.join-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
    counter-reset: step;
}

.step-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow-card);
    position: relative;
    transition: var(--transition);
}

.step-item:hover {
    transform: translateY(-4px);
}

.step-num {
    width: 48px;
    height: 48px;
    background: var(--gradient-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 900;
    font-size: 1.2rem;
    margin: 0 auto 16px;
}

.step-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.step-item p {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.6;
}

/* ========================================
   AI赋能区块
   ======================================== */
.ai-section {
    background: linear-gradient(135deg, #0D1117 0%, #1A2A3A 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.ai-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(255,107,0,0.08) 0%, transparent 60%);
    pointer-events: none;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.ai-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
}

.ai-card:hover {
    background: rgba(255,107,0,0.1);
    border-color: rgba(255,107,0,0.4);
    transform: translateY(-4px);
}

.ai-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 10px;
}

.ai-card p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
}

.ai-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

/* ========================================
   底部
   ======================================== */
.site-footer {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-col h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.footer-col p {
    font-size: 0.875rem;
    margin-bottom: 8px;
    line-height: 1.6;
}

.qr-codes {
    display: flex;
    gap: 16px;
    margin-top: 12px;
}

.qr-item .qr-placeholder {
    width: 90px;
    height: 90px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    text-align: center;
    color: rgba(255,255,255,0.4);
    padding: 8px;
}

.social-share {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 8px;
}

.social-share a {
    background: rgba(255,255,255,0.08);
    color: rgba(255,255,255,0.7);
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.85rem;
    transition: var(--transition);
}

.social-share a:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

.footer-bottom p {
    margin-bottom: 4px;
}

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-hero {
    background: var(--gradient-orange);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(255,107,0,0.4);
}

.btn-hero:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,107,0,0.5);
    color: var(--white);
}

.btn-ghost {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.4);
}

.btn-ghost:hover {
    border-color: var(--white);
    background: rgba(255,255,255,0.1);
    color: var(--white);
}

/* ========================================
   内容标签
   ======================================== */
.tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
}

.tag-orange {
    background: rgba(255,107,0,0.12);
    color: var(--primary);
}

.tag-blue {
    background: rgba(0,201,255,0.12);
    color: var(--accent);
}

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

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        order: 3;
    }
    
    .main-nav.open {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: 12px 0;
    }
    
    .main-nav ul li a {
        display: block;
        padding: 12px 20px;
        border-radius: 0;
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    
    .site-header .container {
        flex-wrap: wrap;
        gap: 0;
    }
    
    .entertainment-grid {
        grid-template-columns: 1fr;
    }
    
    .ent-card-large {
        grid-row: span 1;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .ai-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .experts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .hero-content {
        padding: 50px 0;
    }
}

/* ========================================
   懒加载占位
   ======================================== */
img[data-src] {
    opacity: 0;
    transition: opacity 0.4s;
}

img.loaded {
    opacity: 1;
}

/* ========================================
   修车视频内页
   ======================================== */
.page-hero {
    background: var(--gradient-hero);
    padding: 60px 0;
    text-align: center;
}

.page-hero h1 {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--white);
    margin-bottom: 12px;
}

.page-hero p {
    color: rgba(255,255,255,0.7);
    font-size: 1.1rem;
}

/* 分类筛选 */
.filter-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 40px;
}

.filter-tab {
    padding: 8px 20px;
    border-radius: 30px;
    border: 2px solid var(--border);
    background: var(--white);
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

/* 视频播放模态框 */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.video-modal.open {
    display: flex;
}

.modal-content {
    background: var(--dark);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 800px;
    width: 90%;
    position: relative;
}

.modal-close {
    position: absolute;
    top: -16px;
    right: -16px;
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    border: none;
}

.video-player-placeholder {
    aspect-ratio: 16/9;
    background: #111;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.4);
    font-size: 1rem;
}

/* 团队页 */
.team-intro {
    max-width: 700px;
    margin: 0 auto 50px;
    text-align: center;
    font-size: 1.05rem;
    color: var(--muted);
    line-height: 1.8;
}

/* 社区页 */
.community-banner {
    background: linear-gradient(135deg, var(--primary), #e55a00);
    padding: 50px 0;
    text-align: center;
    color: var(--white);
}

.community-banner h1 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 12px;
}

.community-banner p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 关于页 */
.about-intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 20px;
}

.about-text p {
    font-size: 1rem;
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-img {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.about-img img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

@media (max-width: 768px) {
    .about-intro-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 修车配件页 */
.parts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}

.part-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.part-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.part-img {
    aspect-ratio: 4/3;
    overflow: hidden;
}

.part-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

.part-card:hover .part-img img {
    transform: scale(1.05);
}

.part-info {
    padding: 16px;
}

.part-info h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}

.part-price {
    color: var(--primary);
    font-size: 1.2rem;
    font-weight: 800;
}

.part-price span {
    font-size: 0.8rem;
    color: var(--muted);
    text-decoration: line-through;
    margin-left: 8px;
    font-weight: 400;
}

/* 文章列表 */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.article-item {
    display: flex;
    gap: 20px;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.article-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
}

.article-thumb {
    width: 200px;
    flex-shrink: 0;
    overflow: hidden;
}

.article-thumb img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    transition: transform 0.4s;
}

.article-item:hover .article-thumb img {
    transform: scale(1.05);
}

.article-content {
    padding: 20px;
    flex: 1;
}

.article-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.article-content p {
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 12px;
}

.article-meta {
    display: flex;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--muted);
}

@media (max-width: 600px) {
    .article-item {
        flex-direction: column;
    }
    
    .article-thumb {
        width: 100%;
    }
}


/* ========================================
   页面Hero区（内页通用）
   ======================================== */
.page-hero {
    background: var(--gradient-hero);
    padding: 60px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(255,107,0,0.15) 0%, transparent 60%);
}
.page-hero .container {
    position: relative;
    z-index: 1;
}
.page-hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: var(--white);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.page-hero p {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
    max-width: 700px;
    margin: 0 auto;
}

/* ========================================
   社区功能模块
   ======================================== */
.community-modules {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 32px;
}
.comm-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    border-top: 3px solid transparent;
}
.comm-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-top-color: var(--primary);
}
.comm-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
}
.comm-card h3 {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 10px;
}
.comm-card p {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.65;
    margin-bottom: 16px;
}
.comm-link {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--primary);
}
.comm-link:hover {
    color: #e55a00;
}

/* ========================================
   话题列表
   ======================================== */
.topics-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
}
.topic-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: var(--transition);
    border-left: 4px solid var(--primary);
}
.topic-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-hover);
}
.topic-tag {
    display: inline-block;
    background: var(--gradient-orange);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 30px;
    width: fit-content;
}
.topic-item h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
}
.topic-meta {
    display: flex;
    gap: 20px;
    font-size: 0.82rem;
    color: var(--muted);
}

/* ========================================
   发展历程时间轴
   ======================================== */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 80px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), transparent);
}
.timeline-item {
    display: flex;
    gap: 32px;
    margin-bottom: 32px;
    align-items: flex-start;
    position: relative;
}
.timeline-year {
    background: var(--gradient-orange);
    color: var(--white);
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 900;
    font-size: 0.9rem;
    white-space: nowrap;
    flex-shrink: 0;
    width: 80px;
    text-align: center;
    position: relative;
    z-index: 1;
}
.timeline-content {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px 24px;
    flex: 1;
    box-shadow: var(--shadow-card);
}
.timeline-content h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}
.timeline-content p {
    font-size: 0.875rem;
    color: var(--muted);
}

/* ========================================
   荣誉资质
   ======================================== */
.honors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 32px;
}
.honor-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}
.honor-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.honor-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}
.honor-item h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}
.honor-item span {
    font-size: 0.82rem;
    color: var(--primary);
    font-weight: 700;
}

/* ========================================
   关于我们布局
   ======================================== */
.about-intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.about-text h2 {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--text);
    margin-bottom: 20px;
}
.about-text h3 {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text);
    margin: 24px 0 12px;
}
.about-text p {
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 14px;
}
.about-img img {
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    width: 100%;
    object-fit: cover;
}
@media (max-width: 768px) {
    .about-intro-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   联系页面
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.contact-info h2 {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--text);
    margin-bottom: 16px;
}
.contact-info > p {
    color: var(--muted);
    margin-bottom: 28px;
}
.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px;
    background: var(--light);
    border-radius: var(--radius);
}
.contact-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}
.contact-item h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
}
.contact-item p {
    font-size: 0.9rem;
    color: var(--muted);
    margin: 0;
}
.contact-form-wrap h2 {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--text);
    margin-bottom: 8px;
}
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.form-group label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
}
.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
    color: var(--text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255,107,0,0.1);
}
.form-group textarea {
    resize: vertical;
    min-height: 120px;
}
@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   合作伙伴
   ======================================== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
    margin-top: 32px;
}
.partner-item {
    background: var(--white);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
    transition: var(--transition);
}
.partner-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ========================================
   FAQ 编号样式
   ======================================== */
.faq-num {
    display: inline-block;
    background: var(--gradient-orange);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 900;
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 10px;
    vertical-align: middle;
    flex-shrink: 0;
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    gap: 12px;
}
.faq-question h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}
.faq-toggle {
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--primary);
    flex-shrink: 0;
    transition: transform 0.3s;
    line-height: 1;
}
.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

/* ========================================
   团队专家卡片（内页版）
   ======================================== */
.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
    margin-top: 32px;
}
.expert-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.expert-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}
.expert-photo {
    width: 100%;
    height: 220px;
    object-fit: cover;
}
.expert-info {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.expert-info h3 {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--text);
}
.expert-role {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
}
.expert-exp {
    font-size: 0.85rem;
    color: var(--muted);
}
.expert-bio {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.7;
}
.expert-awards {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 4px 0;
}
.award-tag {
    background: var(--light);
    color: var(--text);
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 30px;
    border: 1px solid var(--border);
}
.expert-actions {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}
.btn-sm {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}
.btn-primary {
    background: var(--gradient-orange);
    color: var(--white);
    border: none;
}
.btn-primary:hover {
    opacity: 0.9;
    color: var(--white);
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

/* ========================================
   成就数字展示
   ======================================== */
.achievement-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 32px;
}
.achievement-item {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px 20px;
    text-align: center;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.achievement-num {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--primary);
    display: block;
}
.achievement-label {
    font-size: 0.9rem;
    color: var(--muted);
}
@media (max-width: 768px) {
    .achievement-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .experts-grid {
        grid-template-columns: 1fr;
    }
    .timeline::before {
        display: none;
    }
}

/* ========================================
   section-dark（深色背景区块）
   ======================================== */
.section-dark {
    background: var(--secondary);
    padding: 80px 0;
}
.section-dark .section-header h2 {
    color: var(--white);
}
.section-dark .section-header p {
    color: rgba(255,255,255,0.6);
}