/* ============================================================
   红桃解说视频 - style.css
   配色: 红色主色 + 亮红点缀 + 深色背景 + 白色文字
   风格: 运动感深色红主题
   ============================================================ */

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --red: #c0392b;
  --red-bright: #e74c3c;
  --red-dark: #8b2820;
  --bg-dark: #1c1c1c;
  --bg-dark-2: #252525;
  --bg-card: #2a2a2a;
  --bg-card-2: #333333;
  --text-white: #ffffff;
  --text-grey: #b0b0b0;
  --text-dim: #777777;
  --border-dark: #3a3a3a;
  --shadow-red: rgba(192, 57, 43, 0.4);
  --shadow-soft: rgba(0, 0, 0, 0.4);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', sans-serif;
  color: var(--text-white);
  background-color: var(--bg-dark);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Liu Jian Mao Cao', cursive;
  font-weight: normal;
  color: var(--text-white);
  line-height: 1.2;
  letter-spacing: 1px;
}

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

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

ul {
  list-style: none;
}

/* ===== 容器 ===== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 70px 0;
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-red {
  background: linear-gradient(135deg, var(--red-bright) 0%, var(--red) 100%);
  color: var(--text-white);
  box-shadow: 0 8px 20px var(--shadow-red);
}

.btn-red:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(231, 76, 60, 0.55);
}

.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 2px solid var(--red-bright);
}

.btn-outline:hover {
  background: var(--red-bright);
  border-color: var(--red-bright);
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(28, 28, 28, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--red);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.logo {
  font-family: 'Liu Jian Mao Cao', cursive;
  font-size: 32px;
  color: var(--red-bright);
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 2px;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--red-bright), var(--red));
  color: var(--text-white);
  border-radius: var(--radius-sm);
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 22px;
  font-weight: 900;
  transform: skewX(-8deg);
}

.nav-menu {
  display: flex;
  gap: 4px;
}

.nav-menu a {
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-grey);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-white);
  background: var(--red);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(231, 76, 60, 0.15);
  border: 1px solid var(--red-bright);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--red-bright);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.live-dot {
  width: 8px;
  height: 8px;
  background: var(--red-bright);
  border-radius: 50%;
  animation: pulse 1.4s ease-in-out infinite;
}

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

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--red-bright);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== 脉冲动画 ===== */
@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.7);
  }
  50% {
    transform: scale(1.3);
    opacity: 0.6;
    box-shadow: 0 0 0 10px rgba(231, 76, 60, 0);
  }
}

/* ===== Hero 大展示 ===== */
.hero {
  position: relative;
  padding: 60px 0 70px;
  background:
    radial-gradient(circle at 80% 20%, rgba(231, 76, 60, 0.18), transparent 50%),
    radial-gradient(circle at 10% 90%, rgba(192, 57, 43, 0.12), transparent 50%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 50px;
  align-items: center;
}

.hero-text .tagline {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(231, 76, 60, 0.15);
  border-left: 3px solid var(--red-bright);
  color: var(--red-bright);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero-text h1 {
  font-size: 64px;
  margin-bottom: 20px;
  color: var(--text-white);
  letter-spacing: 2px;
}

.hero-text h1 .accent {
  color: var(--red-bright);
}

.hero-text p {
  font-size: 16px;
  color: var(--text-grey);
  margin-bottom: 28px;
}

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

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 38px;
  padding-top: 28px;
  border-top: 1px solid var(--border-dark);
}

.hero-stat .num {
  font-family: 'Liu Jian Mao Cao', cursive;
  font-size: 36px;
  color: var(--red-bright);
  display: block;
  letter-spacing: 1px;
}

.hero-stat .label {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 精选视频卡片 */
.featured-video {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px var(--shadow-soft), 0 0 0 1px var(--border-dark);
  aspect-ratio: 16 / 9;
}

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

.featured-video::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.85) 100%);
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 84px;
  height: 84px;
  background: var(--red-bright);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2;
  transition: var(--transition);
  box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.7);
  animation: ring 2s ease-out infinite;
}

.play-btn::before {
  content: '';
  border-style: solid;
  border-width: 14px 0 14px 22px;
  border-color: transparent transparent transparent var(--text-white);
  margin-left: 6px;
}

.featured-video:hover .play-btn {
  transform: translate(-50%, -50%) scale(1.15);
  background: var(--red);
}

@keyframes ring {
  0% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.6); }
  100% { box-shadow: 0 0 0 30px rgba(231, 76, 60, 0); }
}

.featured-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 26px;
  z-index: 2;
}

.video-tag {
  position: absolute;
  top: 18px;
  left: 18px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--red);
  color: var(--text-white);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.featured-overlay h3 {
  color: var(--text-white);
  font-size: 28px;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.featured-overlay .meta {
  display: flex;
  gap: 16px;
  color: var(--text-grey);
  font-size: 14px;
}

/* ===== 区块标题 ===== */
.section-head {
  margin-bottom: 40px;
  position: relative;
  padding-left: 18px;
}

.section-head::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 4px;
  background: linear-gradient(180deg, var(--red-bright), var(--red));
  border-radius: 2px;
}

.section-head h2 {
  font-size: 38px;
  color: var(--text-white);
  margin-bottom: 8px;
  letter-spacing: 2px;
}

.section-head h2 .accent {
  color: var(--red-bright);
}

.section-head p {
  color: var(--text-grey);
  font-size: 15px;
}

.section-head.center {
  text-align: center;
  padding-left: 0;
}

.section-head.center::before {
  display: none;
}

/* ===== 视频卡片网格 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.video-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--red);
  box-shadow: 0 16px 40px var(--shadow-red), 0 0 0 1px var(--red-bright);
}

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

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

.video-card:hover .video-thumb img {
  transform: scale(1.1);
}

.thumb-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.7);
  width: 56px;
  height: 56px;
  background: var(--red-bright);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.thumb-play::before {
  content: '';
  border-style: solid;
  border-width: 9px 0 9px 14px;
  border-color: transparent transparent transparent var(--text-white);
  margin-left: 4px;
}

.video-card:hover .thumb-play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.85);
  color: var(--text-white);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
}

.video-info {
  padding: 16px 18px 18px;
}

.video-info .cat-tag {
  display: inline-block;
  font-size: 11px;
  color: var(--red-bright);
  background: rgba(231, 76, 60, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 700;
}

.video-info h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
  line-height: 1.5;
  letter-spacing: 0;
}

.video-info .meta {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-dim);
}

.video-info .meta .views::before {
  content: '▶ ';
  color: var(--red-bright);
}

/* ===== 赛事分析列表 ===== */
.analysis-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.analysis-item {
  display: flex;
  gap: 20px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
  padding-right: 18px;
}

.analysis-item:hover {
  border-color: var(--red);
  transform: translateX(8px);
  box-shadow: 0 8px 24px var(--shadow-red);
}

.analysis-item .num {
  font-family: 'Liu Jian Mao Cao', cursive;
  font-size: 64px;
  color: var(--red);
  opacity: 0.5;
  padding: 16px 0 0 22px;
  line-height: 1;
  letter-spacing: 2px;
  min-width: 80px;
  text-align: center;
}

.analysis-item .thumb {
  width: 220px;
  aspect-ratio: 16 / 9;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.analysis-item .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.analysis-item .body {
  padding: 18px 0;
  flex: 1;
}

.analysis-item .body .cat {
  display: inline-block;
  font-size: 11px;
  color: var(--red-bright);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  margin-bottom: 6px;
}

.analysis-item .body h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0;
}

.analysis-item .body p {
  color: var(--text-grey);
  font-size: 14px;
  margin-bottom: 10px;
}

.analysis-item .body .meta {
  display: flex;
  gap: 16px;
  font-size: 13px;
  color: var(--text-dim);
}

.analysis-item .body .meta .author {
  color: var(--red-bright);
  font-weight: 600;
}

/* ===== 解说员卡片 ===== */
.analyst-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.analyst-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
  text-align: center;
  padding: 30px 22px;
}

.analyst-card:hover {
  transform: translateY(-6px);
  border-color: var(--red-bright);
  box-shadow: 0 14px 32px var(--shadow-red);
}

.analyst-avatar {
  width: 110px;
  height: 110px;
  margin: 0 auto 16px;
  position: relative;
}

.analyst-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--red);
}

.analyst-card h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
  margin-bottom: 6px;
}

.analyst-card .specialty {
  display: inline-block;
  font-size: 12px;
  color: var(--red-bright);
  background: rgba(231, 76, 60, 0.12);
  padding: 4px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 700;
}

.analyst-card .bio {
  color: var(--text-grey);
  font-size: 14px;
  margin-bottom: 14px;
  min-height: 60px;
}

.analyst-card .stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-dim);
  padding-top: 14px;
  border-top: 1px solid var(--border-dark);
}

.analyst-card .stats strong {
  color: var(--red-bright);
  font-family: 'Liu Jian Mao Cao', cursive;
  font-size: 20px;
  display: block;
  letter-spacing: 1px;
}

/* ===== 五大联赛导航 / 分类导航 ===== */
.league-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.league-chip {
  padding: 10px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-grey);
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.league-chip:hover {
  border-color: var(--red-bright);
  color: var(--text-white);
}

.league-chip.active {
  background: linear-gradient(135deg, var(--red-bright), var(--red));
  color: var(--text-white);
  border-color: var(--red);
}

/* ===== 关于页 hero ===== */
.about-hero {
  background:
    linear-gradient(135deg, rgba(192, 57, 43, 0.9), rgba(139, 40, 32, 0.95)),
    radial-gradient(circle at 30% 30%, rgba(231, 76, 60, 0.4), transparent 60%);
  color: var(--text-white);
  padding: 80px 40px;
  border-radius: var(--radius-xl);
  text-align: center;
  margin-bottom: 50px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--red-dark);
}

.about-hero::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 250px;
  height: 250px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
}

.about-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
}

.about-hero h1 {
  font-size: 48px;
  color: var(--text-white);
  margin-bottom: 16px;
  position: relative;
  letter-spacing: 3px;
}

.about-hero p {
  font-size: 17px;
  max-width: 680px;
  margin: 0 auto;
  position: relative;
  opacity: 0.95;
}

/* 价值卡 */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 32px 26px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--red-bright);
  transform: scaleY(0);
  transform-origin: top;
  transition: var(--transition);
}

.value-card:hover {
  border-color: var(--red);
  transform: translateY(-6px);
}

.value-card:hover::before {
  transform: scaleY(1);
}

.value-card .icon {
  width: 64px;
  height: 64px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--red-bright), var(--red));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  transform: skewX(-8deg);
}

.value-card h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: 0;
}

.value-card p {
  color: var(--text-grey);
  font-size: 14px;
}

/* 数据 */
.data-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 40px 0;
}

.data-item {
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-top: 3px solid var(--red-bright);
  padding: 30px 20px;
  border-radius: var(--radius-md);
}

.data-item .num {
  font-family: 'Liu Jian Mao Cao', cursive;
  font-size: 48px;
  color: var(--red-bright);
  display: block;
  margin-bottom: 6px;
  letter-spacing: 2px;
}

.data-item .label {
  color: var(--text-grey);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* 时间线（发展历程） */
.timeline-list {
  position: relative;
  padding-left: 30px;
}

.timeline-list::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--red-bright), var(--red), var(--bg-card));
}

.timeline-item {
  position: relative;
  margin-bottom: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: var(--transition);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 22px;
  width: 18px;
  height: 18px;
  background: var(--bg-dark);
  border: 3px solid var(--red-bright);
  border-radius: 50%;
  z-index: 1;
}

.timeline-item:hover {
  border-color: var(--red);
  transform: translateX(6px);
}

.timeline-item .year {
  font-family: 'Liu Jian Mao Cao', cursive;
  font-size: 28px;
  color: var(--red-bright);
  letter-spacing: 2px;
  display: block;
  margin-bottom: 6px;
}

.timeline-item h4 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: 0;
}

.timeline-item p {
  color: var(--text-grey);
  font-size: 14px;
}

/* ===== 联系表单 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  padding: 36px;
  border-radius: var(--radius-lg);
}

.contact-form h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--red-bright);
  letter-spacing: 0;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
  font-size: 13px;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-dark);
  border: 2px solid var(--border-dark);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  color: var(--text-white);
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--red-bright);
  background: var(--bg-dark-2);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-info-card {
  background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 100%);
  color: var(--text-white);
  padding: 36px;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}

.contact-info-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.contact-info-card h3 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-white);
  position: relative;
  letter-spacing: 0;
}

.contact-info-card .info-item {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
  position: relative;
}

.contact-info-card .info-item .icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  transform: skewX(-8deg);
}

.contact-info-card .info-item h5 {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: 15px;
  margin-bottom: 2px;
  font-weight: 700;
  letter-spacing: 0;
}

.contact-info-card .info-item p {
  font-size: 14px;
  opacity: 0.9;
}

.social-row {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  position: relative;
}

.social-row a {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-white);
  transition: var(--transition);
}

.social-row a:hover {
  background: var(--text-white);
  color: var(--red);
  transform: translateY(-3px);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #111111;
  color: var(--text-grey);
  padding: 60px 0 24px;
  margin-top: 70px;
  border-top: 3px solid var(--red);
}

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

.footer-brand .logo {
  color: var(--red-bright);
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 18px;
  max-width: 320px;
}

.footer-col h5 {
  font-family: 'Noto Sans SC', sans-serif;
  color: var(--text-white);
  font-size: 15px;
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-dim);
  font-size: 14px;
}

.footer-col ul li a:hover {
  color: var(--red-bright);
}

.footer-bottom {
  border-top: 1px solid var(--border-dark);
  padding-top: 22px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

/* ===== 通用工具 ===== */
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .video-grid,
  .analyst-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .data-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero-text h1 {
    font-size: 48px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-dark-2);
    padding: 14px;
    gap: 4px;
    border-bottom: 2px solid var(--red);
  }
  .nav-menu.open {
    display: flex;
  }
  .menu-toggle {
    display: flex;
  }
  .hero-text h1 {
    font-size: 36px;
  }
  .video-grid,
  .analyst-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .analysis-item {
    flex-direction: column;
    padding-right: 0;
  }
  .analysis-item .num {
    padding: 16px 0 0 22px;
    font-size: 48px;
  }
  .analysis-item .thumb {
    width: 100%;
  }
  .about-hero h1 {
    font-size: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .hero-stats {
    flex-wrap: wrap;
    gap: 18px;
  }
}

@media (max-width: 480px) {
  .data-stats {
    grid-template-columns: 1fr;
  }
  .hero-text h1 {
    font-size: 30px;
  }
  .section {
    padding: 50px 0;
  }
  .play-btn {
    width: 64px;
    height: 64px;
  }
}