/* ========================================
   国产视频 品牌网站 - 全局样式表
   原创设计：现代渐变风格 + 温暖色调
   ======================================== */

/* 根样式变量 */
:root {
    --primary-color: #FF6B9D;
    --secondary-color: #6B3FA0;
    --accent-color: #FFD700;
    --dark-bg: #0F0F1E;
    --light-bg: #FFFFFF;
    --text-dark: #1A1A2E;
    --text-light: #F5F5F5;
    --border-color: #E0E0E0;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.15);
}

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Poppins', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   导航栏样式
   ======================================== */
.navbar {
    background: linear-gradient(135deg, #FFFFFF 0%, #FFF5F8 100%);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.navbar-logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-weight: 700;
    font-size: 20px;
    color: var(--text-dark);
    transition: all 0.3s ease;
}

.navbar-logo a:hover {
    transform: scale(1.05);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 搜索框 */
.navbar-search {
    flex: 1;
    max-width: 400px;
    margin: 0 30px;
    display: flex;
    align-items: center;
    background: #F5F5F5;
    border-radius: 25px;
    padding: 8px 15px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.navbar-search:focus-within {
    border-color: var(--primary-color);
    background: #FFFFFF;
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 14px;
    color: var(--text-dark);
}

.search-input::placeholder {
    color: #999;
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary-color);
    font-size: 18px;
    transition: all 0.3s ease;
    padding: 5px;
}

.search-btn:hover {
    transform: scale(1.1);
    color: var(--secondary-color);
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 15px;
    transition: all 0.3s ease;
    padding: 8px 0;
}

.nav-link:hover,
.nav-item.active .nav-link {
    color: var(--primary-color);
}

.nav-item.active .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 移动菜单 */
.mobile-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #FFFFFF 0%, #FFF5F8 100%);
    flex-direction: column;
    padding: 20px;
    gap: 15px;
    box-shadow: var(--shadow);
    z-index: 999;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    padding: 12px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.mobile-menu-link:hover {
    background: #F0F0F0;
    color: var(--primary-color);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
    background: linear-gradient(135deg, #FF6B9D 0%, #6B3FA0 100%);
    color: white;
    padding: 80px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(20px); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.95;
    font-weight: 300;
}

.hero-cta {
    display: inline-flex;
    gap: 15px;
}

.btn {
    padding: 14px 32px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

/* ========================================
   内容区域通用样式
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 20px;
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 50px;
    text-align: center;
    color: var(--text-dark);
}

.section-title span {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   视频卡片样式
   ======================================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.video-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: linear-gradient(135deg, #FF6B9D 0%, #6B3FA0 100%);
    overflow: hidden;
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 107, 157, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 10;
}

.play-button::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 15px solid white;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    margin-left: 3px;
}

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

.video-info {
    padding: 15px;
}

.video-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    line-height: 1.4;
}

.video-stats {
    display: flex;
    gap: 15px;
    font-size: 13px;
    color: #999;
}

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

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

.faq-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 15px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--text-dark);
    user-select: none;
}

.faq-question:hover {
    background: #F5F5F5;
}

.faq-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    color: #666;
}

.faq-item.active .faq-answer {
    padding: 0 20px 20px 20px;
    max-height: 500px;
}

/* ========================================
   用户评论样式
   ======================================== */
.comments-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.comment-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.comment-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.comment-meta {
    flex: 1;
}

.comment-name {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 3px;
}

.comment-time {
    font-size: 12px;
    color: #999;
}

.comment-rating {
    color: var(--accent-color);
    font-size: 14px;
    margin-bottom: 10px;
}

.comment-text {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* ========================================
   底部样式
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--dark-bg) 0%, #1A1A3E 100%);
    color: var(--text-light);
    padding: 60px 20px 30px;
    margin-top: 80px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.footer-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: #CCC;
    margin-bottom: 15px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.3s ease;
    text-decoration: none;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-subtitle {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: white;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
    font-size: 14px;
    color: #CCC;
}

.footer-links a {
    color: #CCC;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.app-download {
    display: flex;
    gap: 20px;
}

.qr-code {
    text-align: center;
}

.qr-code img {
    width: 80px;
    height: 80px;
    margin-bottom: 8px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.qr-code p {
    font-size: 12px;
    color: #CCC;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.copyright {
    font-size: 14px;
    color: #999;
    margin-bottom: 10px;
}

.footer-links-bottom {
    font-size: 13px;
}

.footer-links-bottom a {
    color: #999;
    text-decoration: none;
    margin: 0 5px;
    transition: all 0.3s ease;
}

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

/* ========================================
   通用工具类
   ======================================== */
.text-center {
    text-align: center;
}

.mt-40 {
    margin-top: 40px;
}

.mb-40 {
    margin-bottom: 40px;
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* ========================================
   加载动画
   ======================================== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 107, 157, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================
   渐变文本
   ======================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   卡片样式
   ======================================== */
.card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.card-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}