/* =============================================
   开云体育官网 - 主样式文件
   asi-login-kaiyunsport.com
   ============================================= */

/* ---- CSS变量 ---- */
:root {
    --brand-blue: #0a2d6e;
    --brand-orange: #f47c20;
    --brand-red: #e02020;
    --brand-dark: #1a1a2e;
    --brand-light: #f5f7fa;
    --text-dark: #222;
    --text-gray: #666;
    --text-light: #999;
    --border-color: #e0e0e0;
    --shadow: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.18);
    --radius: 10px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
}

/* ---- 重置与基础 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    background: #fff;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- 容器 ---- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section-pad { padding: 80px 0; }
.section-pad-sm { padding: 50px 0; }

/* ---- 通用标题 ---- */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--brand-dark);
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.section-subtitle {
    font-size: 1rem;
    color: var(--text-gray);
    text-align: center;
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.section-title span { color: var(--brand-orange); }

/* ---- 按钮 ---- */
.btn-primary {
    display: inline-block;
    background: var(--brand-orange);
    color: #fff;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 1px;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(244,124,32,0.4);
}
.btn-primary:hover { background: #d96a10; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(244,124,32,0.5); }
.btn-secondary {
    display: inline-block;
    background: transparent;
    color: #fff;
    padding: 13px 34px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.7);
    transition: var(--transition);
}
.btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.btn-outline {
    display: inline-block;
    background: transparent;
    color: var(--brand-blue);
    padding: 10px 28px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    border: 2px solid var(--brand-blue);
    transition: var(--transition);
}
.btn-outline:hover { background: var(--brand-blue); color: #fff; }

/* ============================================
   顶部公告栏
   ============================================ */
.top-bar {
    background: var(--brand-dark);
    color: rgba(255,255,255,0.8);
    font-size: 0.8rem;
    padding: 6px 0;
    text-align: center;
}
.top-bar a { color: var(--brand-orange); margin: 0 8px; }

/* ============================================
   导航栏
   ============================================ */
.site-header {
    background: #fff;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}
.site-header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 20px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--brand-blue), var(--brand-orange));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.4rem;
    font-weight: 900;
    letter-spacing: -1px;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-name { font-size: 1.2rem; font-weight: 800; color: var(--brand-blue); }
.logo-en { font-size: 0.65rem; color: var(--text-gray); letter-spacing: 2px; text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
    padding: 8px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dark);
    border-radius: 6px;
    transition: var(--transition);
    white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { color: var(--brand-orange); background: rgba(244,124,32,0.08); }
.nav-cta {
    background: var(--brand-orange) !important;
    color: #fff !important;
    padding: 8px 18px !important;
    border-radius: 50px !important;
}
.nav-cta:hover { background: #d96a10 !important; }

/* 搜索框 */
.search-bar {
    background: var(--brand-light);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}
.search-inner {
    display: flex;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    overflow: hidden;
    transition: var(--transition);
}
.search-inner:focus-within { border-color: var(--brand-orange); box-shadow: 0 0 0 3px rgba(244,124,32,0.1); }
.search-input {
    flex: 1;
    border: none;
    outline: none;
    padding: 10px 20px;
    font-size: 0.9rem;
    background: transparent;
    font-family: inherit;
}
.search-btn {
    background: var(--brand-orange);
    color: #fff;
    padding: 10px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 0 50px 50px 0;
    transition: var(--transition);
}
.search-btn:hover { background: #d96a10; }

/* 汉堡菜单 */
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 5px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }

/* ============================================
   面包屑
   ============================================ */
.breadcrumb {
    background: var(--brand-light);
    padding: 12px 0;
    font-size: 0.85rem;
    color: var(--text-gray);
}
.breadcrumb a { color: var(--brand-blue); }
.breadcrumb a:hover { color: var(--brand-orange); }
.breadcrumb span { margin: 0 6px; color: var(--text-light); }

/* ============================================
   Banner / Hero
   ============================================ */
.hero {
    position: relative;
    min-height: 580px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--brand-dark);
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.45;
    transition: opacity 0.5s;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10,45,110,0.85) 0%, rgba(26,26,46,0.6) 100%);
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    color: #fff;
}
.hero-badge {
    display: inline-block;
    background: var(--brand-orange);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 50px;
    margin-bottom: 16px;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.hero h1 {
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 18px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}
.hero h1 span { color: var(--brand-orange); }
.hero p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 24px;
    line-height: 1.8;
}
.hero-advantages {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
}
.hero-advantages li {
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    backdrop-filter: blur(4px);
}
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }

/* Banner轮播指示器 */
.hero-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 3;
}
.hero-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
}
.hero-dot.active { background: var(--brand-orange); width: 24px; border-radius: 4px; }

/* ============================================
   统计数字条
   ============================================ */
.stats-bar {
    background: var(--brand-blue);
    padding: 30px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
}
.stat-item { color: #fff; }
.stat-num { font-size: 2.2rem; font-weight: 900; color: var(--brand-orange); display: block; }
.stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.75); margin-top: 4px; }

/* ============================================
   视频网格
   ============================================ */
.videos-section { background: var(--brand-light); }
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.video-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.video-thumb {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
    background: #000;
}
.video-thumb img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.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(244,124,32,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    transform: scale(0.8);
    transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff;
    margin-left: 4px;
}
.video-live-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--brand-red);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 4px;
    letter-spacing: 1px;
}
.video-info { padding: 16px; }
.video-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 10px; line-height: 1.5; color: var(--text-dark); }
.video-meta { display: flex; gap: 14px; font-size: 0.78rem; color: var(--text-light); }
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.video-tag {
    background: rgba(10,45,110,0.07);
    color: var(--brand-blue);
    font-size: 0.72rem;
    padding: 3px 10px;
    border-radius: 50px;
}

/* ============================================
   品牌介绍
   ============================================ */
.intro-section { background: #fff; }
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.intro-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-hover); }
.intro-content h2 { font-size: 1.8rem; font-weight: 800; color: var(--brand-dark); margin-bottom: 16px; }
.intro-content h2 span { color: var(--brand-orange); }
.intro-content p { color: var(--text-gray); margin-bottom: 20px; line-height: 1.9; }
.intro-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 24px;
}
.value-item {
    background: var(--brand-light);
    border-radius: 8px;
    padding: 14px;
    border-left: 3px solid var(--brand-orange);
}
.value-item h4 { font-size: 0.9rem; font-weight: 700; color: var(--brand-blue); margin-bottom: 4px; }
.value-item p { font-size: 0.8rem; color: var(--text-gray); margin: 0; }

/* ============================================
   服务模块
   ============================================ */
.services-section { background: var(--brand-light); }
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.service-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 4px solid transparent;
    text-align: center;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-top-color: var(--brand-orange); }
.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--brand-blue), #1a5cb5);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    font-size: 1.8rem;
    color: #fff;
}
.service-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; color: var(--brand-dark); }
.service-card p { font-size: 0.88rem; color: var(--text-gray); line-height: 1.8; }
.service-advantage {
    display: inline-block;
    background: rgba(244,124,32,0.1);
    color: var(--brand-orange);
    font-size: 0.78rem;
    padding: 4px 12px;
    border-radius: 50px;
    margin-top: 12px;
    font-weight: 600;
}

/* ============================================
   案例模块
   ============================================ */
.cases-section { background: #fff; }
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.case-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.case-img { position: relative; height: 200px; overflow: hidden; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-industry {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--brand-orange);
    color: #fff;
    font-size: 0.72rem;
    padding: 4px 12px;
    border-radius: 50px;
    font-weight: 600;
}
.case-body { padding: 20px; }
.case-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--brand-dark); }
.case-body p { font-size: 0.85rem; color: var(--text-gray); line-height: 1.7; margin-bottom: 10px; }
.case-result {
    background: var(--brand-light);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.8rem;
    color: var(--brand-blue);
    font-weight: 600;
    border-left: 3px solid var(--brand-orange);
}

/* ============================================
   资讯模块
   ============================================ */
.news-section { background: var(--brand-light); }
.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
}
.news-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.news-card-img { height: 180px; overflow: hidden; }
.news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.news-card:hover .news-card-img img { transform: scale(1.05); }
.news-body { padding: 18px; }
.news-category {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--brand-orange);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.news-body h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; color: var(--brand-dark); line-height: 1.5; }
.news-body p { font-size: 0.82rem; color: var(--text-gray); line-height: 1.7; }
.news-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; font-size: 0.78rem; color: var(--text-light); }
.news-meta a { color: var(--brand-orange); font-weight: 600; }

/* ============================================
   用户评价
   ============================================ */
.reviews-section { background: #fff; }
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.review-card {
    background: var(--brand-light);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
    position: relative;
}
.review-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.review-card::before {
    content: '"';
    font-size: 5rem;
    color: var(--brand-orange);
    opacity: 0.15;
    position: absolute;
    top: -10px;
    left: 16px;
    line-height: 1;
    font-family: Georgia, serif;
}
.review-stars { color: #f5a623; font-size: 1rem; margin-bottom: 10px; }
.review-text { font-size: 0.88rem; color: var(--text-gray); line-height: 1.8; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; border: 2px solid var(--brand-orange); }
.review-name { font-size: 0.9rem; font-weight: 700; color: var(--brand-dark); }
.review-date { font-size: 0.75rem; color: var(--text-light); }

/* ============================================
   FAQ
   ============================================ */
.faq-section { background: var(--brand-light); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: #fff;
    border-radius: var(--radius);
    margin-bottom: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    overflow: hidden;
}
.faq-question {
    padding: 18px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--brand-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}
.faq-question:hover { color: var(--brand-orange); }
.faq-question.active { color: var(--brand-orange); background: rgba(244,124,32,0.04); }
.faq-icon {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--brand-orange);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    transition: var(--transition);
}
.faq-question.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    font-size: 0.88rem;
    color: var(--text-gray);
    line-height: 1.9;
}
.faq-answer.open { max-height: 200px; padding: 0 24px 18px; }

/* ============================================
   合作伙伴
   ============================================ */
.partners-section { background: #fff; }
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: center;
}
.partner-logo {
    background: var(--brand-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 28px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-gray);
    transition: var(--transition);
    min-width: 120px;
    text-align: center;
}
.partner-logo:hover { border-color: var(--brand-orange); color: var(--brand-orange); background: rgba(244,124,32,0.04); }

/* ============================================
   联系模块
   ============================================ */
.contact-section { background: var(--brand-light); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}
.contact-info h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 20px; color: var(--brand-dark); }
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 18px;
}
.contact-icon {
    width: 42px;
    height: 42px;
    background: var(--brand-blue);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.contact-text strong { display: block; font-size: 0.85rem; color: var(--text-gray); margin-bottom: 2px; }
.contact-text span { font-size: 0.95rem; font-weight: 600; color: var(--brand-dark); }
.contact-map { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.contact-map img { width: 100%; height: 280px; object-fit: cover; }
.qr-group { display: flex; gap: 20px; margin-top: 24px; }
.qr-item { text-align: center; }
.qr-item img { width: 90px; height: 90px; border: 2px solid var(--border-color); border-radius: 8px; margin-bottom: 6px; }
.qr-item span { font-size: 0.78rem; color: var(--text-gray); }

/* ============================================
   页脚
   ============================================ */
.site-footer {
    background: var(--brand-dark);
    color: rgba(255,255,255,0.75);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-name { color: #fff; font-size: 1.3rem; }
.footer-brand .logo-en { color: rgba(255,255,255,0.5); }
.footer-brand p { font-size: 0.85rem; line-height: 1.8; margin: 16px 0; color: rgba(255,255,255,0.6); }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 0.85rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--brand-orange); padding-left: 4px; }
.footer-social { display: flex; gap: 10px; margin-top: 16px; }
.social-btn {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}
.social-btn:hover { background: var(--brand-orange); color: #fff; }
.footer-bottom {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.45);
    flex-wrap: wrap;
    gap: 10px;
}
.footer-bottom a { color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: var(--brand-orange); }
.footer-qr { display: flex; gap: 20px; }
.footer-qr-item { text-align: center; }
.footer-qr-item img { width: 70px; height: 70px; border-radius: 6px; border: 1px solid rgba(255,255,255,0.15); }
.footer-qr-item span { display: block; font-size: 0.7rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

/* ============================================
   内页 Hero
   ============================================ */
.page-hero {
    background: linear-gradient(135deg, var(--brand-blue) 0%, var(--brand-dark) 100%);
    padding: 60px 0;
    color: #fff;
    text-align: center;
}
.page-hero h1 { font-size: 2.2rem; font-weight: 900; margin-bottom: 10px; }
.page-hero p { font-size: 1rem; color: rgba(255,255,255,0.8); max-width: 500px; margin: 0 auto; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .news-grid { grid-template-columns: 1fr 1fr; }
    .intro-grid { gap: 40px; }
}

@media (max-width: 768px) {
    .section-pad { padding: 50px 0; }
    .section-title { font-size: 1.6rem; }
    .hero h1 { font-size: 1.9rem; }
    .hero { min-height: 450px; }
    .main-nav { display: none; position: absolute; top: 70px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 10px; box-shadow: 0 8px 20px rgba(0,0,0,0.1); gap: 2px; }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 12px 16px; border-radius: 8px; }
    .hamburger { display: flex; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .intro-grid { grid-template-columns: 1fr; }
    .intro-img { display: none; }
    .contact-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .hero-buttons { flex-direction: column; align-items: flex-start; }
    .video-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .container { padding: 0 14px; }
    .hero h1 { font-size: 1.5rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .video-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .intro-values { grid-template-columns: 1fr; }
}

/* ============================================
   懒加载占位
   ============================================ */
img[loading="lazy"] { background: #f0f0f0; }

/* ============================================
   滚动动画
   ============================================ */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ============================================
   内页通用
   ============================================ */
.inner-section { padding: 70px 0; }
.inner-section:nth-child(even) { background: var(--brand-light); }

/* 下载中心 */
.download-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.download-card { background: #fff; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); text-align: center; transition: var(--transition); }
.download-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.download-icon { font-size: 2.5rem; margin-bottom: 12px; }
.download-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.download-card p { font-size: 0.82rem; color: var(--text-gray); margin-bottom: 14px; }

/* 帮助中心 */
.help-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.help-card { background: #fff; border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); border-top: 3px solid var(--brand-blue); transition: var(--transition); }
.help-card:hover { border-top-color: var(--brand-orange); transform: translateY(-3px); }
.help-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; color: var(--brand-dark); }
.help-card p { font-size: 0.85rem; color: var(--text-gray); line-height: 1.7; }

/* 表单 */
.contact-form { background: #fff; border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 600; color: var(--text-dark); margin-bottom: 6px; }
.form-control {
    width: 100%;
    padding: 11px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
    background: #fff;
}
.form-control:focus { border-color: var(--brand-orange); box-shadow: 0 0 0 3px rgba(244,124,32,0.1); }
textarea.form-control { resize: vertical; min-height: 120px; }