/**
 * 摄状元®AI创影 - 主样式表
 * 设计风格：深色 + 中国红 + 金色 | 科技感 | 响应式（mobile-first）
 */

/* ========== CSS变量 ========== */
:root {
    --color-primary: #C41E3A;
    --color-primary-dark: #9B1830;
    --color-primary-light: #E8324F;
    --color-gold: #D4A017;
    --color-gold-light: #F0C040;
    --color-gold-dark: #A07800;
    --color-bg-dark: #0A0A0F;
    --color-bg-section: #111118;
    --color-bg-card: #1A1A24;
    --color-bg-card-hover: #22222E;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B0B0C0;
    --color-text-muted: #707080;
    --color-border: #2A2A38;
    --color-border-light: #3A3A4A;
    
    --font-family: "Alibaba PuHuiTi", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    
    --container-max: 1200px;
    --header-height: 70px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 30px rgba(196,30,58,0.3);
    --transition: all 0.3s ease;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-secondary);
    background: var(--color-bg-dark);
    overflow-x: hidden;
    min-height: 100vh;
}
a { color: var(--color-gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-gold-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { color: var(--color-text-primary); line-height: 1.3; font-weight: 700; }
h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
p { margin-bottom: 1rem; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

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

/* ========== 通用区块 ========== */
.section {
    padding: 80px 0;
}
.section-dark { background: var(--color-bg-section); }
.section-header {
    text-align: center;
    margin-bottom: 50px;
}
.section-header h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.section-header .subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}
.section-header .divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
    margin: 16px auto 0;
    border-radius: 2px;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-decoration: none;
    gap: 8px;
}
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    box-shadow: 0 4px 15px rgba(196,30,58,0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(196,30,58,0.6);
    color: #fff;
}
.btn-gold {
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    color: #000;
    box-shadow: 0 4px 15px rgba(212,160,23,0.4);
}
.btn-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(212,160,23,0.6);
    color: #000;
}
.btn-outline {
    background: transparent;
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
}
.btn-outline:hover {
    background: var(--color-gold);
    color: #000;
}
.btn-lg { padding: 16px 36px; font-size: var(--font-size-lg); }
.btn-sm { padding: 8px 18px; font-size: var(--font-size-sm); }

/* ========== 顶部导航 ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background: rgba(10,10,15,0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}
.site-header.scrolled {
    background: rgba(10,10,15,0.98);
    box-shadow: var(--shadow-md);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}
.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.main-nav { display: none; }
.main-nav .nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
}
.main-nav .nav-item { position: relative; }
.main-nav .nav-item > a {
    display: block;
    padding: 8px 14px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.main-nav .nav-item > a:hover,
.main-nav .nav-item.active > a {
    color: var(--color-text-primary);
    background: rgba(196,30,58,0.1);
}
.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 8px 0;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}
.has-submenu:hover .submenu { display: block; }
.submenu li a {
    display: block;
    padding: 8px 20px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}
.submenu li a:hover {
    color: var(--color-text-primary);
    background: rgba(196,30,58,0.1);
}

/* 移动端菜单 */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
}
.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition);
}

/* ========== Hero区 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 80px;
    overflow: hidden;
    background: radial-gradient(ellipse at 50% 50%, rgba(196,30,58,0.15) 0%, transparent 60%),
                var(--color-bg-dark);
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23C41E3A' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}
.hero-badge {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(196,30,58,0.15);
    border: 1px solid rgba(196,30,58,0.3);
    border-radius: 50px;
    color: var(--color-primary-light);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: 24px;
}
.hero h1 {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
}
.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-gold), var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero .slogan {
    font-size: var(--font-size-xl);
    color: var(--color-gold);
    font-weight: 600;
    margin-bottom: 16px;
}
.hero .description {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== 数据统计 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.stat-card {
    text-align: center;
    padding: 30px 20px;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.stat-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}
.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}
.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: 8px;
}

/* ========== 卡片网格 ========== */
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.card-image {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    background: var(--color-bg-section);
}
.card-body { padding: 20px; }
.card-body h3 { font-size: var(--font-size-lg); margin-bottom: 8px; }
.card-body p { color: var(--color-text-muted); font-size: var(--font-size-sm); margin-bottom: 12px; }
.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}
.card-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(196,30,58,0.15);
    color: var(--color-primary-light);
    border-radius: 50px;
    font-size: var(--font-size-xs);
}

/* ========== 特性展示 ========== */
.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
.feature-card {
    padding: 32px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    text-align: center;
}
.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}
.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(196,30,58,0.2), rgba(212,160,23,0.2));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}
.feature-card h3 { font-size: var(--font-size-lg); margin-bottom: 10px; }
.feature-card p { color: var(--color-text-muted); font-size: var(--font-size-sm); }

/* ========== 课程卡片 ========== */
.course-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.course-card:hover {
    border-color: var(--color-gold);
    box-shadow: 0 0 20px rgba(212,160,23,0.2);
    transform: translateY(-4px);
}
.course-header {
    padding: 24px;
    background: linear-gradient(135deg, rgba(196,30,58,0.1), rgba(212,160,23,0.1));
    text-align: center;
}
.course-header h3 { font-size: var(--font-size-xl); margin-bottom: 8px; }
.course-header .course-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-gold);
    color: #000;
    border-radius: 50px;
    font-size: var(--font-size-xs);
    font-weight: 600;
}
.course-body { padding: 24px; }
.course-body ul { margin-bottom: 20px; }
.course-body li {
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}
.course-body li::before {
    content: "✦ ";
    color: var(--color-gold);
}

/* ========== 报价表 ========== */
.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
.pricing-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}
.pricing-card.featured {
    border-color: var(--color-gold);
    box-shadow: 0 0 30px rgba(212,160,23,0.2);
}
.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--color-gold);
    color: #000;
    border-radius: 50px;
    font-size: var(--font-size-xs);
    font-weight: 700;
}
.pricing-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 8px;
}
.pricing-price {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    color: var(--color-gold);
    margin-bottom: 4px;
}
.pricing-unit {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: 24px;
}
.pricing-features {
    text-align: left;
    margin-bottom: 28px;
}
.pricing-features li {
    padding: 8px 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}
.pricing-features li::before {
    content: "✓ ";
    color: var(--color-gold);
    font-weight: 700;
}

/* ========== 新闻列表 ========== */
.news-list { display: flex; flex-direction: column; gap: 20px; }
.news-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    flex-direction: column;
}
.news-item:hover {
    border-color: var(--color-border-light);
    background: var(--color-bg-card-hover);
}
.news-thumb {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-radius: var(--radius-md);
    background: var(--color-bg-section);
}
.news-info h3 {
    font-size: var(--font-size-lg);
    margin-bottom: 8px;
}
.news-info h3 a { color: var(--color-text-primary); }
.news-info h3 a:hover { color: var(--color-gold); }
.news-info p { color: var(--color-text-muted); font-size: var(--font-size-sm); }
.news-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: 8px;
}

/* ========== 表单 ========== */
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}
.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg-section);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(196,30,58,0.2);
}
textarea.form-control { min-height: 120px; resize: vertical; }
select.form-control { appearance: none; cursor: pointer; }

/* ========== 分页 ========== */
.pagination ul, .admin-pagination ul {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}
.pagination li a, .admin-pagination li a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    transition: var(--transition);
}
.pagination li a:hover, .admin-pagination li a:hover {
    border-color: var(--color-primary);
    color: var(--color-text-primary);
}
.pagination li.active a, .admin-pagination li.active a {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-3px); }

/* ========== Flash消息 ========== */
.flash-message {
    padding: 12px 0;
    text-align: center;
    font-size: var(--font-size-sm);
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    z-index: 999;
    animation: slideDown 0.3s ease;
}
.flash-success { background: rgba(34,197,94,0.9); color: #fff; }
.flash-error { background: rgba(239,68,68,0.9); color: #fff; }
.flash-info { background: rgba(59,130,246,0.9); color: #fff; }

@keyframes slideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ========== 页面Banner ========== */
.page-banner {
    padding: 120px 20px 60px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 80%, rgba(196,30,58,0.12) 0%, transparent 50%),
                var(--color-bg-dark);
}
.page-banner h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--color-text-primary), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.page-banner p {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
}

/* ========== 合伙人计划 ========== */
.partner-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
.partner-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    transition: var(--transition);
}
.partner-card:hover {
    border-color: var(--color-gold);
    transform: translateY(-4px);
}
.partner-card .partner-level {
    font-size: var(--font-size-2xl);
    font-weight: 900;
    color: var(--color-gold);
    margin-bottom: 12px;
}
.partner-card .partner-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

/* ========== 关于页 ========== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}
.about-content p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}
.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 24px 0;
}
.tech-badge {
    padding: 8px 18px;
    background: rgba(196,30,58,0.1);
    border: 1px solid rgba(196,30,58,0.3);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    color: var(--color-primary-light);
}

/* ========== Footer ========== */
.site-footer {
    background: var(--color-bg-section);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
}
.footer-brand .footer-logo {
    font-size: var(--font-size-xl);
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}
.footer-slogan {
    color: var(--color-gold);
    font-size: var(--font-size-sm);
    margin-bottom: 8px;
}
.footer-tech {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}
.footer-links h4 {
    font-size: var(--font-size-base);
    margin-bottom: 16px;
    color: var(--color-text-primary);
}
.footer-links li { margin-bottom: 8px; }
.footer-links a {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}
.footer-links a:hover { color: var(--color-gold); }
.footer-contact h4 {
    font-size: var(--font-size-base);
    margin-bottom: 16px;
    color: var(--color-text-primary);
}
.footer-contact p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: 6px;
}
.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
}
.footer-bottom p {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: 4px;
}
.footer-disclaimer {
    max-width: 700px;
    margin: 12px auto 0;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    opacity: 0.7;
}

/* ========== 响应式 - 平板 ========== */
@media (min-width: 768px) {
    .stats-grid { grid-template-columns: repeat(4, 1fr); }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: repeat(3, 1fr); }
    .partner-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(3, 1fr); }
    .news-item { flex-direction: row; }
    .news-thumb { width: 200px; flex-shrink: 0; }
    h1 { font-size: var(--font-size-5xl); }
    .hero h1 { font-size: 4rem; }
}

/* ========== 响应式 - 桌面 ========== */
@media (min-width: 1024px) {
    .mobile-menu-toggle { display: none; }
    .main-nav { display: block; }
    .card-grid { grid-template-columns: repeat(3, 1fr); }
    .features-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr; }
}

/* ========== 动画 ========== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg-dark); }
::-webkit-scrollbar-thumb { background: var(--color-border-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary); }

/* ========== 选中文本 ========== */
::selection { background: rgba(196,30,58,0.3); color: #fff; }