/* 糖心vlog - 全新原创样式表 */
/* 域名: yhiscd.cn */

/* CSS变量定义 */
:root {
    --primary-purple: #6B4EAE;
    --primary-gold: #D4AF37;
    --dark-purple: #4A3578;
    --light-purple: #9B7ED9;
    --bg-dark: #1A1425;
    --bg-light: #F8F6FC;
    --text-dark: #2D2438;
    --text-light: #6E6479;
    --gradient-main: linear-gradient(135deg, #6B4EAE 0%, #D4AF37 100%);
    --gradient-dark: linear-gradient(135deg, #1A1425 0%, #2D2438 100%);
    --shadow-soft: 0 4px 20px rgba(107, 78, 174, 0.15);
    --shadow-hover: 0 8px 30px rgba(107, 78, 174, 0.25);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-light);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

/* 容器 */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 20, 37, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    transition: var(--transition);
}

.header.scrolled {
    padding: 10px 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 35px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-main);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-gold);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active {
    color: var(--primary-gold);
}

.nav-link.active::after {
    width: 100%;
}

/* 搜索框 */
.search-box {
    background: var(--bg-dark);
    padding: 15px 0;
    border-bottom: 1px solid rgba(107, 78, 174, 0.2);
    margin-top: 75px;
}

.search-wrapper {
    display: flex;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    padding: 5px 5px 5px 25px;
    border: 1px solid rgba(107, 78, 174, 0.3);
}

.search-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-size: 0.95rem;
    padding: 10px 0;
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.search-btn {
    background: var(--gradient-main);
    border: none;
    padding: 12px 30px;
    border-radius: 50px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.4);
}

/* 英雄区域 */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(107, 78, 174, 0.3) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-text h1 span {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 35px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 20px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 35px;
    background: var(--gradient-main);
    color: #fff;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 35px;
    background: transparent;
    color: #fff;
    font-weight: 600;
    border-radius: 50px;
    border: 2px solid var(--primary-gold);
    transition: var(--transition);
}

.btn-secondary:hover {
    background: var(--primary-gold);
    color: var(--bg-dark);
}

.hero-visual {
    position: relative;
}

.hero-image {
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: auto;
}

/* 统计数据 */
.stats-bar {
    background: var(--bg-dark);
    padding: 40px 0;
    border-top: 1px solid rgba(107, 78, 174, 0.2);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 25px;
    background: rgba(107, 78, 174, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid rgba(107, 78, 174, 0.2);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    background: rgba(107, 78, 174, 0.2);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

/* 区块标题 */
.section {
    padding: 80px 0;
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-header h2 span {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

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

.section-dark .section-header h2 {
    color: #fff;
}

.section-dark .section-header p {
    color: rgba(255, 255, 255, 0.7);
}

/* 视频卡片 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.video-card {
    background: #fff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.video-card:hover .video-thumb img {
    transform: scale(1.08);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 60px;
    height: 60px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.video-card:hover .play-btn {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid #fff;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 5px;
}

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

.video-info {
    padding: 18px;
}

.video-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 分类标签 */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.category-tab {
    padding: 10px 25px;
    background: rgba(107, 78, 174, 0.1);
    color: var(--primary-purple);
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.category-tab:hover,
.category-tab.active {
    background: var(--gradient-main);
    color: #fff;
}

/* 专家团队 */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.expert-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    border: 1px solid transparent;
}

.expert-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-purple);
    box-shadow: var(--shadow-hover);
}

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto 20px;
    overflow: hidden;
    border: 4px solid var(--primary-gold);
}

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

.expert-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.expert-title {
    color: var(--primary-purple);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.expert-credentials {
    font-size: 0.85rem;
    color: var(--primary-gold);
    margin-bottom: 15px;
}

.expert-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
}

.expert-btns {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
    border-radius: 50px;
}

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

.btn-outline:hover {
    background: var(--primary-purple);
    color: #fff;
}

/* 功能模块 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 35px;
    text-align: center;
    border: 1px solid rgba(107, 78, 174, 0.2);
    transition: var(--transition);
}

.feature-card:hover {
    background: rgba(107, 78, 174, 0.1);
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2rem;
}

.feature-card h4 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* 用户评价 */
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.review-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 30px;
    box-shadow: var(--shadow-soft);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 18px;
}

.review-avatar {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: var(--gradient-main);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 1.3rem;
}

.review-user h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.review-stars {
    color: var(--primary-gold);
    font-size: 0.9rem;
}

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

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

.faq-item {
    background: #fff;
    border-radius: var(--radius-md);
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.faq-question {
    padding: 22px 28px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(107, 78, 174, 0.05);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-purple);
    transition: var(--transition);
}

.faq-item.active .faq-question::after {
    content: '−';
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 28px 22px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 合作伙伴 */
.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
    flex-wrap: wrap;
}

.partners-logos img {
    max-height: 60px;
    opacity: 0.6;
    filter: grayscale(100%);
    transition: var(--transition);
}

.partners-logos img:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.contact-item {
    text-align: center;
    padding: 30px 20px;
    background: rgba(107, 78, 174, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid rgba(107, 78, 174, 0.2);
}

.contact-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
}

.contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 10px;
}

.contact-item p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

/* 页脚 */
.footer {
    background: var(--gradient-dark);
    padding: 60px 0 30px;
    color: #fff;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 20px;
}

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

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

.qrcode-item img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.qrcode-item span {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 3px;
    background: var(--gradient-main);
    border-radius: 2px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

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

.social-share {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.share-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 0.9rem;
    transition: var(--transition);
}

.share-btn:hover {
    background: var(--gradient-main);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-bottom p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: var(--primary-gold);
}

/* 面包屑 */
.breadcrumb {
    padding: 15px 0;
    background: var(--bg-dark);
    margin-top: 75px;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.breadcrumb-list a {
    color: rgba(255, 255, 255, 0.7);
}

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

.breadcrumb-list span {
    color: rgba(255, 255, 255, 0.4);
}

.breadcrumb-list .current {
    color: var(--primary-gold);
}

/* 内页样式 */
.page-hero {
    background: var(--gradient-dark);
    padding: 100px 0 60px;
    margin-top: 75px;
}

.page-hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 15px;
}

.page-hero h1 span {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-hero p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
}

/* 直播卡片 */
.live-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.live-card {
    background: #fff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.live-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.live-thumb {
    position: relative;
    aspect-ratio: 16/9;
}

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

.live-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: #ff4757;
    color: #fff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    animation: livePulse 2s infinite;
}

@keyframes livePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.live-viewers {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.live-info {
    padding: 18px;
}

.live-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.live-host {
    display: flex;
    align-items: center;
    gap: 10px;
}

.live-host img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
}

.live-host span {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 工具卡片 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.tool-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 35px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.tool-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-main);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 2.2rem;
}

.tool-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.tool-card p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.8rem;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .expert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .expert-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .review-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-qrcodes {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 1.8rem;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* 懒加载占位 */
.lazy-load {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.lazy-load.loaded {
    opacity: 1;
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}