/* 91网 - 主样式文件 */
/* 全局重置与基础 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #1a6fc4;
    --primary-dark: #1256a0;
    --primary-light: #3d8fd6;
    --accent: #e84b3a;
    --accent-hover: #c73d2e;
    --bg: #f5f7fa;
    --bg-white: #ffffff;
    --bg-dark: #0d1b2e;
    --text-main: #1a1a2e;
    --text-muted: #6b7280;
    --text-light: #9ca3af;
    --border: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.14);
    --radius: 10px;
    --radius-lg: 18px;
    --transition: 0.25s ease;
    --font-main: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-main);
    background: var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
    list-style: none;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 顶部导航 ===== */
.site-header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--primary);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 20px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    white-space: nowrap;
}

.site-logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
}

.site-logo span {
    color: var(--accent);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.95rem;
    color: var(--text-main);
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--primary);
    color: #fff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== 搜索框 ===== */
.search-bar-wrap {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 14px 0;
}

.search-bar-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 700px;
    margin: 0 auto;
}

.search-bar-inner input {
    flex: 1;
    padding: 10px 18px;
    border: none;
    border-radius: 30px 0 0 30px;
    font-size: 1rem;
    font-family: var(--font-main);
    outline: none;
    background: #fff;
    color: var(--text-main);
}

.search-bar-inner button {
    padding: 10px 26px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 0 30px 30px 0;
    font-size: 1rem;
    font-family: var(--font-main);
    cursor: pointer;
    font-weight: 600;
    transition: background var(--transition);
}

.search-bar-inner button:hover {
    background: var(--accent-hover);
}

/* ===== Hero 主视觉 ===== */
.hero-section {
    position: relative;
    min-height: 480px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--bg-dark);
}

.hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.45;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
    max-width: 640px;
    padding: 60px 0;
}

.hero-badge {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.hero-content h1 {
    font-size: 2.6rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 18px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.hero-content h1 .brand {
    color: #7ecfff;
}

.hero-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 28px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.btn-primary {
    padding: 12px 30px;
    background: var(--accent);
    color: #fff;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1rem;
    transition: background var(--transition), transform var(--transition);
    display: inline-block;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
}

.btn-outline {
    padding: 12px 30px;
    border: 2px solid rgba(255,255,255,0.7);
    color: #fff;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1rem;
    transition: background var(--transition), border-color var(--transition);
    display: inline-block;
}

.btn-outline:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: #fff;
}

/* ===== 通用区块 ===== */
.section {
    padding: 64px 0;
}

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

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

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 48px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
    margin: 10px auto 0;
}

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

.section-title p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-top: 12px;
}

.section-dark .section-title p {
    color: rgba(255,255,255,0.65);
}

/* ===== 品牌故事 ===== */
.brand-story {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.brand-story-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.brand-story-img img {
    width: 100%;
    height: 340px;
    object-fit: cover;
}

.brand-story-text h3 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--primary);
}

.brand-story-text p {
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 16px;
}

.brand-stats {
    display: flex;
    gap: 28px;
    margin-top: 24px;
}

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

.stat-item .num {
    font-size: 2rem;
    font-weight: 900;
    color: var(--accent);
    display: block;
}

.stat-item .label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== 产品卡片 ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.product-card-img {
    position: relative;
    overflow: hidden;
    height: 200px;
}

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

.product-card:hover .product-card-img img {
    transform: scale(1.06);
}

.product-card-body {
    padding: 20px;
}

.product-card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-main);
}

.product-card-body p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.product-tag {
    display: inline-block;
    background: #e8f0fe;
    color: var(--primary);
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 12px;
    margin-top: 12px;
    font-weight: 600;
}

/* ===== 视频卡片 ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

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

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

.video-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: #000;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s ease;
}

.video-card:hover .video-thumb img {
    opacity: 0.75;
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.7);
    width: 52px;
    height: 52px;
    background: rgba(255,255,255,0.92);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
}

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

.video-play-btn svg {
    width: 22px;
    height: 22px;
    fill: var(--primary);
    margin-left: 3px;
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    font-size: 0.75rem;
    padding: 2px 7px;
    border-radius: 4px;
}

.video-card-body {
    padding: 14px;
}

.video-card-body h4 {
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-main);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--text-light);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* ===== 场景推荐 ===== */
.scenes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.scene-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition);
}

.scene-card:hover {
    transform: translateY(-4px);
}

.scene-card-img {
    height: 180px;
    overflow: hidden;
}

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

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

.scene-card-body {
    padding: 18px;
}

.scene-card-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.scene-card-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== 用户评价 ===== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.review-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    border-top: 3px solid var(--primary);
    transition: transform var(--transition);
}

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

.review-stars {
    color: #f59e0b;
    font-size: 1rem;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.review-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 14px;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 10px;
}

.review-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.review-user-info .name {
    font-weight: 600;
    font-size: 0.9rem;
}

.review-user-info .date {
    font-size: 0.78rem;
    color: var(--text-light);
}

/* ===== 媒体推荐 ===== */
.media-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.media-card {
    background: rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid rgba(255,255,255,0.12);
    transition: background var(--transition);
}

.media-card:hover {
    background: rgba(255,255,255,0.14);
}

.media-card blockquote {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.85);
    font-style: italic;
    margin-bottom: 14px;
    border-left: 3px solid var(--accent);
    padding-left: 14px;
}

.media-card .media-name {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    font-weight: 600;
}

/* ===== 购买指南 ===== */
.guide-steps {
    display: flex;
    gap: 0;
    position: relative;
}

.guide-steps::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 60px;
    right: 60px;
    height: 2px;
    background: var(--border);
    z-index: 0;
}

.guide-step {
    flex: 1;
    text-align: center;
    padding: 0 16px;
    position: relative;
    z-index: 1;
}

.step-num {
    width: 64px;
    height: 64px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 900;
    margin: 0 auto 16px;
    box-shadow: 0 4px 12px rgba(26,111,196,0.3);
}

.guide-step h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.guide-step p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
}

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

.faq-item {
    background: var(--bg-white);
    border-radius: var(--radius);
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--border);
}

.faq-question {
    padding: 18px 22px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition);
    user-select: none;
}

.faq-question:hover {
    background: #f0f4ff;
}

.faq-question.active {
    color: var(--primary);
    background: #e8f0fe;
}

.faq-icon {
    font-size: 1.2rem;
    transition: transform var(--transition);
    color: var(--primary);
    flex-shrink: 0;
}

.faq-question.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 22px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.faq-answer.open {
    max-height: 300px;
    padding: 0 22px 18px;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.contact-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 30px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.6rem;
}

.contact-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.75);
    padding: 48px 0 0;
}

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

.footer-brand .site-logo {
    color: #fff;
    margin-bottom: 14px;
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.55);
}

.footer-col h5 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.55);
    transition: color var(--transition);
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 18px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.4);
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.4);
}

.footer-bottom a:hover {
    color: rgba(255,255,255,0.75);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 12px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

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

.breadcrumb span {
    margin: 0 6px;
    color: var(--text-light);
}

/* ===== 内页 Banner ===== */
.page-banner {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: #fff;
    padding: 48px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../assets/images/tutorial_banner.jpg') center/cover no-repeat;
    opacity: 0.15;
}

.page-banner-content {
    position: relative;
    z-index: 1;
}

.page-banner h1 {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 10px;
}

.page-banner p {
    font-size: 1.05rem;
    opacity: 0.85;
}

/* ===== 内页内容 ===== */
.inner-content {
    padding: 48px 0;
}

.inner-grid {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 36px;
    align-items: start;
}

.main-content {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-sm);
}

.main-content h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--primary);
    border-left: 4px solid var(--accent);
    padding-left: 14px;
}

.main-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 24px 0 10px;
    color: var(--text-main);
}

.main-content p {
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 14px;
}

.main-content ul {
    list-style: disc;
    padding-left: 20px;
    margin-bottom: 14px;
}

.main-content ul li {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 6px;
}

.sidebar {
    position: sticky;
    top: 80px;
}

.sidebar-widget {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.sidebar-widget h5 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary);
    color: var(--text-main);
}

.sidebar-widget ul li {
    margin-bottom: 8px;
}

.sidebar-widget ul li a {
    font-size: 0.88rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color var(--transition);
}

.sidebar-widget ul li a:hover {
    color: var(--primary);
}

.sidebar-widget ul li a::before {
    content: '›';
    color: var(--primary);
    font-size: 1.1rem;
}

/* ===== 更新日志 ===== */
.changelog-list {
    position: relative;
    padding-left: 28px;
}

.changelog-list::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.changelog-item {
    position: relative;
    margin-bottom: 32px;
}

.changelog-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid #fff;
    box-shadow: 0 0 0 2px var(--primary);
}

.changelog-version {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 0.8rem;
    padding: 2px 10px;
    border-radius: 12px;
    font-weight: 700;
    margin-bottom: 6px;
}

.changelog-date {
    font-size: 0.82rem;
    color: var(--text-light);
    margin-left: 8px;
}

.changelog-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.changelog-item ul {
    list-style: disc;
    padding-left: 18px;
}

.changelog-item ul li {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 4px;
}

/* ===== 下载中心 ===== */
.download-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.download-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.download-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.download-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.download-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.download-btn {
    display: inline-block;
    padding: 8px 22px;
    background: var(--primary);
    color: #fff;
    border-radius: 20px;
    font-size: 0.88rem;
    font-weight: 600;
    transition: background var(--transition);
}

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

/* ===== 搜索提示弹窗 ===== */
.search-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.search-modal.show {
    display: flex;
}

.search-modal-box {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 420px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.search-modal-box h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.search-modal-box p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.modal-close {
    padding: 10px 28px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 20px;
    font-size: 0.95rem;
    cursor: pointer;
    font-family: var(--font-main);
    font-weight: 600;
}

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

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }
    .brand-story {
        grid-template-columns: 1fr;
    }
    .products-grid,
    .scenes-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px;
        box-shadow: var(--shadow-md);
        gap: 4px;
    }
    .main-nav.open {
        display: flex;
    }
    .nav-toggle {
        display: flex;
    }
    .header-inner {
        position: relative;
    }
    .inner-grid {
        grid-template-columns: 1fr;
    }
    .guide-steps {
        flex-direction: column;
        gap: 20px;
    }
    .guide-steps::before {
        display: none;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .download-grid {
        grid-template-columns: 1fr;
    }
    .media-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    .section {
        padding: 40px 0;
    }
    .hero-section {
        min-height: 360px;
    }
    .hero-content h1 {
        font-size: 1.5rem;
    }
}