/* ================================================
   91网 - 主样式文件
   霓虹赛博朋克风格 | 明亮潮流 | 沉浸式科技娱乐
   ================================================ */

/* ---- 字体引入 ---- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

/* ---- CSS变量 ---- */
:root {
    --neon-pink: #ff2d78;
    --neon-cyan: #00e5ff;
    --neon-purple: #b44fff;
    --neon-blue: #2979ff;
    --bg-dark: #0a0a1a;
    --bg-card: rgba(255,255,255,0.04);
    --bg-glass: rgba(255,255,255,0.07);
    --text-white: #ffffff;
    --text-light: #e0e0f0;
    --text-muted: #8888aa;
    --border-glow: rgba(0,229,255,0.3);
    --gradient-main: linear-gradient(135deg, #ff2d78 0%, #b44fff 50%, #00e5ff 100%);
    --gradient-card: linear-gradient(135deg, rgba(255,45,120,0.15) 0%, rgba(0,229,255,0.15) 100%);
    --shadow-neon-pink: 0 0 20px rgba(255,45,120,0.5), 0 0 40px rgba(255,45,120,0.2);
    --shadow-neon-cyan: 0 0 20px rgba(0,229,255,0.5), 0 0 40px rgba(0,229,255,0.2);
    --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.7;
    overflow-x: hidden;
}

a { color: var(--neon-cyan); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--neon-pink); }

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

ul, ol { list-style: none; }

/* ---- 粒子背景 ---- */
#particles-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

/* ---- 容器 ---- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ---- 顶部导航 ---- */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(10,10,26,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,229,255,0.15);
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(10,10,26,0.98);
    box-shadow: 0 4px 30px rgba(0,229,255,0.1);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.6rem;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    white-space: nowrap;
}

.site-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-main);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 900;
    color: white;
    -webkit-text-fill-color: white;
    box-shadow: var(--shadow-neon-pink);
    flex-shrink: 0;
}

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

.main-nav a {
    color: var(--text-light);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--neon-cyan);
    background: rgba(0,229,255,0.1);
}

.nav-cta {
    background: var(--gradient-main) !important;
    color: white !important;
    -webkit-text-fill-color: white !important;
    padding: 8px 20px !important;
    border-radius: 20px !important;
    font-weight: 700 !important;
    box-shadow: var(--shadow-neon-pink);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,45,120,0.5) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--neon-cyan);
    border-radius: 2px;
    transition: var(--transition);
}

/* ---- 搜索栏 ---- */
.search-bar-wrapper {
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid rgba(0,229,255,0.1);
    padding: 12px 0;
    position: relative;
    z-index: 999;
    margin-top: 70px;
}

.search-bar-inner {
    display: flex;
    align-items: center;
    max-width: 700px;
    margin: 0 auto;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(0,229,255,0.25);
    border-radius: 30px;
    padding: 0 20px;
    gap: 12px;
    transition: var(--transition);
}

.search-bar-inner:focus-within {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0,229,255,0.2);
}

.search-bar-inner .search-icon {
    color: var(--neon-cyan);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.search-bar-inner input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-white);
    font-size: 0.95rem;
    font-family: var(--font-main);
    padding: 12px 0;
}

.search-bar-inner input::placeholder { color: var(--text-muted); }

.search-btn {
    background: var(--gradient-main);
    border: none;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-main);
    transition: var(--transition);
    white-space: nowrap;
}

.search-btn:hover { transform: scale(1.05); box-shadow: var(--shadow-neon-pink); }

/* ---- 主内容区 ---- */
.main-content { padding-top: 0; }

/* ---- Hero Banner ---- */
.hero-banner {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0a0a1a 0%, #1a0a2e 40%, #0a1a2e 100%);
}

.hero-bg-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(10,10,26,0.9) 40%, rgba(10,10,26,0.3) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    padding: 120px 0 80px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,45,120,0.15);
    border: 1px solid rgba(255,45,120,0.4);
    color: var(--neon-pink);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 10px rgba(255,45,120,0.3); }
    50% { box-shadow: 0 0 25px rgba(255,45,120,0.6); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--text-white);
}

.hero-title .brand-highlight {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    max-width: 560px;
    line-height: 1.8;
}

.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-main);
    color: white;
    padding: 14px 32px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-neon-pink);
    font-family: var(--font-main);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(255,45,120,0.5);
    color: white;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--neon-cyan);
    padding: 13px 32px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 700;
    border: 2px solid var(--neon-cyan);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-main);
}

.btn-outline:hover {
    background: rgba(0,229,255,0.1);
    box-shadow: var(--shadow-neon-cyan);
    transform: translateY(-3px);
    color: var(--neon-cyan);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    flex-wrap: wrap;
}

.hero-stat { text-align: left; }

.hero-stat .num {
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.hero-stat .label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

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

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    background: var(--gradient-card);
    border: 1px solid rgba(0,229,255,0.3);
    color: var(--neon-cyan);
    padding: 5px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: var(--text-white);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-title .brand { color: var(--neon-pink); }

.section-desc {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ---- 视频卡片 ---- */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.video-card {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.video-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0,229,255,0.4);
    box-shadow: 0 20px 60px rgba(0,229,255,0.15), 0 0 0 1px rgba(0,229,255,0.2);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #111128;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0);
    transition: var(--transition);
}

.video-card:hover .play-overlay {
    background: rgba(0,0,0,0.5);
}

.play-btn {
    width: 60px;
    height: 60px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.7);
    transition: var(--transition);
    box-shadow: var(--shadow-neon-pink);
}

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

.play-btn svg { width: 24px; height: 24px; fill: white; margin-left: 4px; }

.video-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--neon-pink);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 10px;
}

.video-info { padding: 16px; }

.video-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 10px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    gap: 14px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ---- 社区模块 ---- */
.community-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}

.danmu-stream {
    background: var(--bg-card);
    border: 1px solid rgba(0,229,255,0.15);
    border-radius: var(--radius-md);
    padding: 24px;
    min-height: 300px;
    overflow: hidden;
    position: relative;
}

.danmu-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--neon-cyan);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.danmu-title::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--neon-cyan);
    border-radius: 50%;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.danmu-item {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    margin: 4px;
    animation: float-in 0.5s ease;
}

@keyframes float-in {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.danmu-item.pink { background: rgba(255,45,120,0.15); color: var(--neon-pink); border: 1px solid rgba(255,45,120,0.3); }
.danmu-item.cyan { background: rgba(0,229,255,0.15); color: var(--neon-cyan); border: 1px solid rgba(0,229,255,0.3); }
.danmu-item.purple { background: rgba(180,79,255,0.15); color: var(--neon-purple); border: 1px solid rgba(180,79,255,0.3); }

.topic-list { display: flex; flex-direction: column; gap: 12px; }

.topic-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    transition: var(--transition);
    cursor: pointer;
}

.topic-item:hover {
    border-color: rgba(255,45,120,0.4);
    background: rgba(255,45,120,0.05);
}

.topic-name { font-size: 0.9rem; font-weight: 600; color: var(--text-white); }
.topic-hot { font-size: 0.8rem; color: var(--neon-pink); font-weight: 700; }

/* ---- AI模块 ---- */
.ai-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}

.ai-card {
    background: var(--bg-card);
    border: 1px solid rgba(180,79,255,0.2);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: var(--gradient-main);
    transform: scaleX(0);
    transition: var(--transition);
}

.ai-card:hover::before { transform: scaleX(1); }

.ai-card:hover {
    transform: translateY(-6px);
    border-color: rgba(180,79,255,0.5);
    box-shadow: 0 16px 50px rgba(180,79,255,0.15);
}

.ai-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, rgba(180,79,255,0.2), rgba(0,229,255,0.2));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
    border: 1px solid rgba(180,79,255,0.3);
}

.ai-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 8px;
}

.ai-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ---- 专家模块 ---- */
.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
}

.expert-card {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}

.expert-card:hover {
    transform: translateY(-6px);
    border-color: rgba(0,229,255,0.3);
    box-shadow: 0 16px 50px rgba(0,229,255,0.1);
}

.expert-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    margin: 0 auto 16px;
    overflow: hidden;
    border: 3px solid transparent;
    background: var(--gradient-main);
    padding: 3px;
}

.expert-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.expert-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 4px;
}

.expert-title {
    font-size: 0.8rem;
    color: var(--neon-cyan);
    margin-bottom: 10px;
}

.expert-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ---- 用户评价 ---- */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
    position: relative;
}

.review-card:hover {
    border-color: rgba(255,45,120,0.3);
    transform: translateY(-4px);
}

.review-card::before {
    content: '"';
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 4rem;
    color: rgba(255,45,120,0.15);
    font-family: Georgia, serif;
    line-height: 1;
}

.review-stars {
    display: flex;
    gap: 3px;
    margin-bottom: 12px;
}

.review-stars span { color: #ffd700; font-size: 0.9rem; }

.review-text {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

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

.review-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.review-name { font-size: 0.85rem; font-weight: 700; color: var(--text-white); }
.review-date { font-size: 0.75rem; color: var(--text-muted); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }

.faq-item {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active { border-color: rgba(0,229,255,0.3); }

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-white);
    transition: var(--transition);
    gap: 16px;
}

.faq-question:hover { color: var(--neon-cyan); }

.faq-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0,229,255,0.15);
    border: 1px solid rgba(0,229,255,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--neon-cyan);
    font-size: 1rem;
    transition: var(--transition);
}

.faq-item.active .faq-icon { transform: rotate(45deg); background: rgba(255,45,120,0.15); border-color: rgba(255,45,120,0.3); color: var(--neon-pink); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.faq-item.active .faq-answer { max-height: 200px; padding: 0 24px 18px; }

/* ---- 合作伙伴 ---- */
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.partner-item {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
    padding: 16px 28px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: var(--transition);
    cursor: pointer;
}

.partner-item:hover {
    border-color: rgba(0,229,255,0.3);
    color: var(--neon-cyan);
    background: rgba(0,229,255,0.05);
}

/* ---- 联系模块 ---- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    border-color: rgba(0,229,255,0.3);
    transform: translateY(-4px);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.contact-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.contact-card .domain-display {
    color: var(--neon-cyan);
    font-weight: 600;
    word-break: break-all;
}

/* ---- 页脚 ---- */
.site-footer {
    background: rgba(5,5,15,0.98);
    border-top: 1px solid rgba(0,229,255,0.1);
    padding: 60px 0 30px;
    position: relative;
    z-index: 1;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand .site-logo { margin-bottom: 16px; display: inline-flex; }

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 20px;
}

.social-links { display: flex; gap: 10px; }

.social-link {
    width: 36px;
    height: 36px;
    background: var(--bg-glass);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

.social-link:hover {
    border-color: var(--neon-pink);
    color: var(--neon-pink);
    background: rgba(255,45,120,0.1);
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-col ul { display: flex; flex-direction: column; gap: 8px; }

.footer-col ul li a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-col ul li a:hover { color: var(--neon-cyan); padding-left: 4px; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-bottom .brand-name { color: var(--neon-pink); font-weight: 700; }

.footer-icp {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-icp a { color: var(--text-muted); }
.footer-icp a:hover { color: var(--neon-cyan); }

/* ---- 通用卡片 ---- */
.glass-card {
    background: var(--bg-glass);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* ---- 渐变分割线 ---- */
.divider {
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(0,229,255,0.3), transparent);
    margin: 0;
}

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: rgba(0,229,255,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,229,255,0.6); }

/* ---- 动画 ---- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes neon-flicker {
    0%, 100% { opacity: 1; }
    92% { opacity: 1; }
    93% { opacity: 0.8; }
    94% { opacity: 1; }
    96% { opacity: 0.9; }
    97% { opacity: 1; }
}

.animate-in { animation: fadeInUp 0.6s ease forwards; }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr 1fr; }
    .community-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .main-nav { display: none; position: absolute; top: 70px; left: 0; right: 0; background: rgba(10,10,26,0.98); flex-direction: column; padding: 16px; border-bottom: 1px solid rgba(0,229,255,0.15); gap: 4px; }
    .main-nav.open { display: flex; }
    .hamburger { display: flex; }
    .hero-content { padding: 100px 0 60px; }
    .hero-stats { gap: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .section { padding: 60px 0; }
    .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-buttons { flex-direction: column; }
    .btn-primary, .btn-outline { width: 100%; justify-content: center; }
    .video-grid { grid-template-columns: 1fr; }
    .experts-grid { grid-template-columns: 1fr 1fr; }
    .reviews-grid { grid-template-columns: 1fr; }
}

/* ---- 内页样式 ---- */
.page-hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, rgba(255,45,120,0.1) 0%, rgba(0,229,255,0.05) 100%);
    border-bottom: 1px solid rgba(0,229,255,0.1);
    text-align: center;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--neon-cyan); }
.breadcrumb .sep { color: rgba(255,255,255,0.2); }
.breadcrumb .current { color: var(--neon-cyan); }

/* ---- 加载动画 ---- */
.loading-bar {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    background: var(--gradient-main);
    z-index: 9999;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(255,45,120,0.5);
}

/* ---- 回到顶部 ---- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: var(--shadow-neon-pink);
    border: none;
    color: white;
    font-size: 1.2rem;
}

.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* ---- 标签 ---- */
.tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin: 2px;
}

.tag-pink { background: rgba(255,45,120,0.15); color: var(--neon-pink); border: 1px solid rgba(255,45,120,0.3); }
.tag-cyan { background: rgba(0,229,255,0.15); color: var(--neon-cyan); border: 1px solid rgba(0,229,255,0.3); }
.tag-purple { background: rgba(180,79,255,0.15); color: var(--neon-purple); border: 1px solid rgba(180,79,255,0.3); }

/* ---- 更新时间 ---- */
.update-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}