/* ============================================
   海角网 - 主样式文件
   byrdkr.cn | Haijiao Media
   原创设计 © 2026
   ============================================ */

/* ---- CSS变量 / 品牌色彩系统 ---- */
:root {
  --color-primary: #0A2342;
  --color-secondary: #1A5276;
  --color-accent: #E84855;
  --color-accent2: #F5A623;
  --color-bg: #F8F9FA;
  --color-bg-dark: #0D1B2A;
  --color-text: #1C2B3A;
  --color-text-light: #5A6A7A;
  --color-white: #FFFFFF;
  --color-border: #E0E8F0;
  --color-card-bg: #FFFFFF;
  --color-nav-bg: rgba(10, 35, 66, 0.97);
  --color-footer-bg: #071524;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  --font-heading: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --shadow-sm: 0 2px 8px rgba(10,35,66,0.08);
  --shadow-md: 0 4px 20px rgba(10,35,66,0.12);
  --shadow-lg: 0 8px 40px rgba(10,35,66,0.18);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --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);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-accent);
}

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

ul, ol {
  list-style: none;
}

/* ---- 容器 ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-wide {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---- 顶部公告栏 ---- */
.top-bar {
  background: var(--color-accent);
  color: var(--color-white);
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  letter-spacing: 0.5px;
}

.top-bar a {
  color: var(--color-white);
  font-weight: 600;
  text-decoration: underline;
}

/* ---- 导航栏 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-nav-bg);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 20px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-logo img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  object-fit: contain;
  background: white;
  padding: 2px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: 1px;
}

.logo-text .brand-sub {
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 2px;
}

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

.main-nav a {
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-white);
  background: rgba(232,72,85,0.2);
}

.nav-btn {
  background: var(--color-accent) !important;
  color: var(--color-white) !important;
  padding: 8px 18px !important;
  border-radius: 20px !important;
  font-weight: 600 !important;
}

.nav-btn:hover {
  background: #c73845 !important;
  transform: translateY(-1px);
}

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

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

/* ---- 搜索框 ---- */
.search-bar-wrapper {
  background: var(--color-primary);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  padding: 10px 0;
}

.search-bar-inner {
  display: flex;
  align-items: center;
  max-width: 600px;
  margin: 0 auto;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 25px;
  overflow: hidden;
  padding: 0 5px 0 18px;
}

.search-bar-inner input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--color-white);
  font-size: 14px;
  padding: 8px 0;
  font-family: var(--font-main);
}

.search-bar-inner input::placeholder {
  color: rgba(255,255,255,0.5);
}

.search-bar-inner button {
  background: var(--color-accent);
  border: none;
  color: white;
  padding: 8px 18px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font-main);
  transition: var(--transition);
}

.search-bar-inner button:hover {
  background: #c73845;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 0;
  font-size: 13px;
  color: var(--color-text-light);
}

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

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

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

/* ---- Hero 横幅 ---- */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0A2342 0%, #1A5276 50%, #0A2342 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner_live.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,35,66,0.9) 0%, rgba(26,82,118,0.7) 100%);
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,72,85,0.2);
  border: 1px solid rgba(232,72,85,0.4);
  color: #ff8a94;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  margin-bottom: 20px;
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-content h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero-content h1 .accent {
  color: var(--color-accent);
}

.hero-content p {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 30px;
  max-width: 560px;
}

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

.hero-stats {
  display: flex;
  gap: 30px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,0.15);
}

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

.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-white);
}

.hero-stat .num span {
  color: var(--color-accent);
}

.hero-stat .label {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  margin-top: 2px;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 25px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-main);
  text-decoration: none;
}

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

.btn-primary:hover {
  background: #c73845;
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(232,72,85,0.4);
}

.btn-secondary {
  background: rgba(255,255,255,0.15);
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.25);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}

/* ---- 区块标题 ---- */
.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  background: rgba(232,72,85,0.1);
  color: var(--color-accent);
  padding: 4px 14px;
  border-radius: 15px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-header h2 {
  font-size: clamp(22px, 4vw, 36px);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-header p {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

.section-header-left {
  text-align: left;
  margin-bottom: 30px;
}

.section-header-left h2 {
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 800;
  color: var(--color-primary);
}

/* ---- 通用区块 ---- */
.section {
  padding: 70px 0;
}

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

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

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

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

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

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a2a3a;
}

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

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

.video-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 .video-play-btn {
  opacity: 1;
}

.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(232,72,85,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
}

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

.play-icon svg {
  width: 22px;
  height: 22px;
  fill: white;
  margin-left: 3px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: white;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
}

.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--color-accent);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.video-info {
  padding: 14px 16px;
}

.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.video-meta .views::before { content: '▶ '; }
.video-meta .likes::before { content: '♥ '; color: var(--color-accent); }
.video-meta .comments::before { content: '💬 '; }

.video-category {
  display: inline-block;
  background: rgba(10,35,66,0.08);
  color: var(--color-primary);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  margin-bottom: 6px;
}

/* ---- 特色视频横幅 ---- */
.featured-video-section {
  background: var(--color-bg-dark);
  padding: 60px 0;
}

.featured-video-wrap {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 40px;
  align-items: center;
}

.featured-video-player {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
}

.featured-video-player img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
}

.featured-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.featured-play-icon {
  width: 80px;
  height: 80px;
  background: rgba(232,72,85,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 0 30px rgba(232,72,85,0.5);
}

.featured-play-icon:hover {
  transform: scale(1.1);
  background: var(--color-accent);
}

.featured-play-icon svg {
  width: 32px;
  height: 32px;
  fill: white;
  margin-left: 5px;
}

.featured-video-info {
  color: var(--color-white);
}

.featured-video-info h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.4;
}

.featured-video-info p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 20px;
  line-height: 1.8;
}

.featured-stats {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
}

.featured-stat {
  text-align: center;
  background: rgba(255,255,255,0.08);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
}

.featured-stat .num {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
}

.featured-stat .label {
  font-size: 11px;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

/* ---- 专家卡片 ---- */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.expert-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.expert-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--color-accent);
}

.expert-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.expert-title {
  font-size: 13px;
  color: var(--color-accent);
  margin-bottom: 10px;
  font-weight: 600;
}

.expert-desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.expert-awards {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 16px;
}

.award-tag {
  background: rgba(245,166,35,0.1);
  color: #b8860b;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 10px;
  border: 1px solid rgba(245,166,35,0.3);
}

.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

/* ---- 社区功能 ---- */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

.community-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
  cursor: pointer;
}

.community-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
}

.community-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 26px;
}

.community-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.community-card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ---- AI赋能区块 ---- */
.ai-section {
  background: linear-gradient(135deg, #0A2342 0%, #1A5276 100%);
  padding: 70px 0;
  position: relative;
  overflow: hidden;
}

.ai-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(232,72,85,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
}

.ai-card:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(232,72,85,0.4);
  transform: translateY(-4px);
}

.ai-card-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.ai-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 10px;
}

.ai-card p {
  font-size: 13px;
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
}

/* ---- 合作品牌 ---- */
.partners-section {
  padding: 50px 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}

.partner-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-light);
  transition: var(--transition);
}

.partner-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(10,35,66,0.05);
}

/* ---- 用户评价 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

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

.review-stars {
  color: #f5a623;
  font-size: 16px;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
  margin-bottom: 16px;
  font-style: italic;
}

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

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.review-author-info .name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.review-author-info .date {
  font-size: 12px;
  color: var(--color-text-light);
}

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

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--color-white);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 24px;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-main);
  transition: var(--transition);
}

.faq-question:hover {
  background: rgba(10,35,66,0.03);
}

.faq-question.active {
  color: var(--color-accent);
}

.faq-icon {
  font-size: 18px;
  font-weight: 300;
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 10px;
}

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

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-answer.open {
  max-height: 300px;
  padding: 0 24px 18px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ---- 联系我们 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.contact-info-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}

.contact-item {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  align-items: flex-start;
}

.contact-item-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item-text .label {
  font-size: 12px;
  color: var(--color-text-light);
  margin-bottom: 2px;
}

.contact-item-text .value {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.qr-codes {
  display: flex;
  gap: 20px;
  margin-top: 20px;
}

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

.qr-item img {
  width: 110px;
  height: 110px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  object-fit: cover;
}

.qr-item p {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 6px;
}

/* ---- 社交分享 ---- */
.social-share {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  font-family: var(--font-main);
}

.share-wechat { background: #07C160; color: white; }
.share-weibo { background: #E6162D; color: white; }
.share-douyin { background: #010101; color: white; }
.share-bilibili { background: #00A1D6; color: white; }

.share-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

/* ---- 加入社区指南 ---- */
.join-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.join-steps::before {
  content: '';
  position: absolute;
  top: 30px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(to right, var(--color-accent), var(--color-secondary));
  z-index: 0;
}

.step-item {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-num {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
  border: 3px solid var(--color-white);
  box-shadow: var(--shadow-md);
}

.step-item h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.step-item p {
  font-size: 12px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ---- 图片展示区 ---- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
}

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

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,35,66,0.8) 0%, transparent 50%);
  opacity: 0;
  transition: var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay span {
  color: white;
  font-size: 13px;
  font-weight: 600;
}

/* ---- 页脚 ---- */
.site-footer {
  background: var(--color-footer-bg);
  color: rgba(255,255,255,0.7);
  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-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .logo-wrap img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: white;
  padding: 2px;
  object-fit: contain;
}

.footer-brand .logo-wrap span {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-white);
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 20px;
}

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

.social-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: var(--transition);
  cursor: pointer;
}

.social-icon:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.footer-col ul li a {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  transition: var(--transition);
}

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

.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
  font-size: 12px;
}

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

.footer-links {
  display: flex;
  gap: 16px;
}

/* ---- 内页横幅 ---- */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  padding: 60px 0;
  text-align: center;
  color: white;
}

.page-hero h1 {
  font-size: clamp(24px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 12px;
}

.page-hero p {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  max-width: 560px;
  margin: 0 auto;
}

/* ---- 标签 ---- */
.tag {
  display: inline-block;
  background: rgba(10,35,66,0.08);
  color: var(--color-primary);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 10px;
  margin: 2px;
}

/* ---- 加载动画 ---- */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- 滚动到顶部 ---- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
}

.back-to-top:hover {
  transform: translateY(-3px);
  background: #c73845;
}

/* ---- 通知弹窗 ---- */
.toast {
  position: fixed;
  bottom: 80px;
  right: 30px;
  background: var(--color-primary);
  color: white;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  opacity: 0;
  transition: var(--transition);
  z-index: 9999;
  max-width: 280px;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ---- 分隔线 ---- */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: 40px 0;
}

/* ---- 文章卡片 ---- */
.article-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

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

.article-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}

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

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

.article-body {
  padding: 18px 20px;
}

.article-body h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.article-body p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--color-text-light);
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }
  
  .ai-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .featured-video-wrap {
    grid-template-columns: 1fr;
  }
  
  .join-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .join-steps::before {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }
  
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-nav-bg);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-top: 1px solid rgba(255,255,255,0.1);
  }
  
  .main-nav.open {
    display: flex;
  }
  
  .main-nav a {
    width: 100%;
    padding: 10px 16px;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-section {
    min-height: 420px;
  }
  
  .hero-stats {
    gap: 16px;
  }
  
  .hero-stat .num {
    font-size: 22px;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .ai-grid {
    grid-template-columns: 1fr;
  }
  
  .join-steps {
    grid-template-columns: 1fr 1fr;
  }
  
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .section {
    padding: 50px 0;
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
  
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-stats {
    flex-wrap: wrap;
  }
  
  .experts-grid {
    grid-template-columns: 1fr;
  }
  
  .community-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .join-steps {
    grid-template-columns: 1fr;
  }
  
  .qr-codes {
    flex-direction: column;
    align-items: center;
  }
}

/* ---- 懒加载占位 ---- */
img[data-src] {
  opacity: 0;
  transition: opacity 0.3s ease;
}

img.loaded {
  opacity: 1;
}

/* ---- 内页特定样式 ---- */
.works-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text-light);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.tool-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
}

.tool-icon {
  font-size: 40px;
  margin-bottom: 14px;
}

.tool-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.tool-card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 14px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}


/* ---- 面包屑导航 ---- */
.breadcrumb {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 0;
  font-size: 13px;
}

.breadcrumb a {
  color: var(--color-secondary);
  text-decoration: none;
}

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

/* ---- 页面Hero ---- */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  padding: 60px 0;
  text-align: center;
}

.page-hero h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-hero p {
  font-size: 16px;
  opacity: 0.8;
}

/* ---- 标签 ---- */
.tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 12px;
  color: var(--color-text-light);
}

/* ---- 图片画廊 ---- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
}

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

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10,35,66,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay span {
  color: white;
  font-size: 16px;
  font-weight: 700;
}

/* ---- 加入步骤 ---- */
.join-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-item {
  text-align: center;
  padding: 24px 16px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: white;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 14px;
}

.step-item h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.step-item p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ---- 合作伙伴 ---- */
.partners-section {
  background: var(--color-white);
  padding: 50px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.partner-item {
  padding: 10px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--color-text-light);
  font-weight: 600;
  transition: var(--transition);
}

.partner-item:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* ---- 评价 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

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

.review-stars {
  color: var(--color-accent2);
  font-size: 18px;
  margin-bottom: 12px;
}

.review-text {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 16px;
  font-style: italic;
}

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

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.review-author-info .name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
}

.review-author-info .date {
  font-size: 12px;
  color: var(--color-text-light);
}

/* ---- FAQ ---- */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--color-white);
}

.faq-question {
  width: 100%;
  padding: 18px 20px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-main);
  transition: var(--transition);
}

.faq-question:hover,
.faq-question.active {
  background: var(--color-bg);
  color: var(--color-accent);
}

.faq-icon {
  font-size: 20px;
  font-weight: 300;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer.open {
  max-height: 400px;
}

.faq-answer p {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ---- 社交分享 ---- */
.social-share {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.share-btn {
  padding: 8px 16px;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
  color: var(--color-text);
}

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

/* ---- 响应式补充 ---- */
@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .join-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .page-hero h1 {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  .join-steps {
    grid-template-columns: 1fr;
  }
}