/* ============================================
   海角 海角海角视频社区 - 主样式文件
   Ltftfe.cn
   ============================================ */

/* CSS Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  color: #1a1a2e;
  background: #0a0a0f;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
ul { list-style: none; }

/* ============ CSS Variables ============ */
:root {
  --primary: #e8a020;
  --primary-dark: #c4851a;
  --secondary: #1a3a6e;
  --accent: #00d4ff;
  --dark: #0a0a0f;
  --dark-card: #12121e;
  --dark-border: #1e1e30;
  --text-light: #e0e0f0;
  --text-muted: #8888aa;
  --gradient-primary: linear-gradient(135deg, #e8a020 0%, #ff6b35 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #12121e 100%);
  --shadow-glow: 0 0 30px rgba(232, 160, 32, 0.3);
  --shadow-card: 0 8px 32px rgba(0,0,0,0.5);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============ Typography ============ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
}
h1 { font-size: clamp(1.8rem, 4vw, 3rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
p { color: var(--text-light); margin-bottom: 1rem; }

/* ============ Layout ============ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 80px 0; }
.section-sm { padding: 50px 0; }
.section-title {
  text-align: center;
  margin-bottom: 50px;
}
.section-title h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}
.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
  margin: 10px auto 0;
  border-radius: 2px;
}
.section-title p {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* ============ Header / Navigation ============ */
#obo3v {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--dark-border);
  transition: var(--transition);
}
#header.scrolled {
  background: rgba(10, 10, 15, 0.99);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding: 0 20px;
  max-width: 1280px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}
.logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}
.logo-text span { color: var(--primary); }

/* Main Nav */
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 14px;
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
  background: rgba(232, 160, 32, 0.1);
}
.nav-cta {
  background: var(--gradient-primary) !important;
  color: #fff !important;
  padding: 8px 18px !important;
  border-radius: 20px !important;
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }

/* Mobile Nav Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}
.nav-toggle span {
  width: 25px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* ============ Search Bar ============ */
.search-bar-wrap {
  background: #0d0d1a;
  border-bottom: 1px solid var(--dark-border);
  padding: 10px 0;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.search-form {
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 600px;
  background: #1a1a2e;
  border: 1px solid var(--dark-border);
  border-radius: 24px;
  overflow: hidden;
  transition: var(--transition);
}
.search-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,160,32,0.15);
}
.search-form input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 9px 18px;
  color: #fff;
  font-size: 0.9rem;
}
.search-form input::placeholder { color: var(--text-muted); }
.search-btn {
  background: var(--gradient-primary);
  border: none;
  padding: 9px 20px;
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}
.search-btn:hover { opacity: 0.85; }
.qi0ye { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.qi0ye span { color: var(--text-muted); font-size: 0.8rem; }
.drspil {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 3px 10px;
  border: 1px solid var(--dark-border);
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
}
.drspil:hover { color: var(--primary); border-color: var(--primary); }

/* ============ Hero / Banner ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 120px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,15,0.8) 0%, rgba(26,58,110,0.4) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(232,160,32,0.15);
  border: 1px solid rgba(232,160,32,0.4);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.2;
}
.hero h1 .highlight { color: var(--primary); }
.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.8);
  max-width: 650px;
  margin-bottom: 36px;
}
.hero-stats {
  display: flex;
  gap: 40px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.zrn1c { text-align: center; }
.q07gbd {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  color: var(--primary);
  display: block;
}
.x5azzvo {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(232,160,32,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(232,160,32,0.5); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }

/* ============ Video Cards ============ */
.video-card {
  background: var(--dark-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--dark-border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
  border-color: rgba(232,160,32,0.3);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a1a2e;
}
.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); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
  width: 60px;
  height: 60px;
  background: rgba(232,160,32,0.9);
  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::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.video-info { padding: 14px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.video-stats { display: flex; gap: 12px; }
.video-stats span { display: flex; align-items: center; gap: 4px; }

/* ============ Cards ============ */
.card {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(232,160,32,0.2);
}
.card-img { aspect-ratio: 16/9; overflow: hidden; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.card:hover .card-img img { transform: scale(1.05); }
.card-body { padding: 20px; }
.card-tag {
  display: inline-block;
  background: rgba(232,160,32,0.15);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}
.card-title { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.card-text { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ============ Expert Cards ============ */
.expert-card {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-6px);
  border-color: rgba(232,160,32,0.4);
  box-shadow: var(--shadow-glow);
}
.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary);
}
.expert-name { font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.expert-role { font-size: 0.85rem; color: var(--primary); margin-bottom: 12px; }
.expert-bio { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.6; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 16px; }
.expert-tag {
  font-size: 0.72rem;
  padding: 3px 10px;
  background: rgba(0,212,255,0.1);
  color: var(--accent);
  border-radius: 12px;
  border: 1px solid rgba(0,212,255,0.2);
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.expert-btns a {
  font-size: 0.78rem;
  padding: 6px 14px;
  border-radius: 16px;
  font-weight: 600;
}
.btn-contact { background: var(--gradient-primary); color: #fff; }
.btn-works { background: transparent; border: 1px solid var(--dark-border); color: var(--text-light); }
.btn-works:hover { border-color: var(--primary); color: var(--primary); }

/* ============ Review Cards ============ */
.review-card {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  padding: 24px;
  transition: var(--transition);
}
.review-card:hover { border-color: rgba(232,160,32,0.3); }
.review-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.review-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-weight: 700; color: #fff; font-size: 0.95rem; }
.review-date { font-size: 0.78rem; color: var(--text-muted); }
.stars { color: #f5c518; font-size: 0.9rem; letter-spacing: 2px; }
.review-text { font-size: 0.88rem; color: var(--text-light); line-height: 1.7; }

/* ============ FAQ ============ */
.faq-item {
  background: var(--dark-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--dark-border);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  padding: 18px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(232,160,32,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.1rem;
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 20px 18px;
}
.faq-answer p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }

/* ============ Partner Logos ============ */
.cvcgm {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: center;
}
.sft6w1mj {
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  padding: 16px 28px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  text-align: center;
  min-width: 120px;
}
.sft6w1mj:hover { color: var(--primary); border-color: var(--primary); }

/* ============ AI Feature Cards ============ */
.ai-card {
  background: linear-gradient(135deg, #12121e 0%, #1a1a2e 100%);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-primary);
}
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); }
.ai-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(232,160,32,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 18px;
}
.ai-card h4 { color: #fff; margin-bottom: 10px; }
.ai-card p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* ============ Contact Section ============ */
.contact-card {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  padding: 28px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--dark-border);
}
.contact-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(232,160,32,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-label { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 4px; }
.contact-value { font-size: 0.95rem; color: #fff; font-weight: 600; }

/* ============ QR Codes ============ */
.qr-section { display: flex; gap: 24px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--dark-border);
  margin-bottom: 8px;
}
.qr-label { font-size: 0.8rem; color: var(--text-muted); }

/* ============ Share Buttons ============ */
.ve3at { display: flex; gap: 10px; flex-wrap: wrap; }
.uzigazc {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}
.gfzcr { background: #07c160; color: #fff; }
.yz6789ag { background: #e6162d; color: #fff; }
.o0dkn { background: #010101; color: #fff; border: 1px solid #333; }
.h1d6j { background: #00a1d6; color: #fff; }
.uzigazc:hover { opacity: 0.85; transform: translateY(-2px); }

/* ============ How-To Join Section ============ */
.mici7zo { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.vhif9n {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  padding: 28px 20px;
  text-align: center;
  position: relative;
}
.jcevooqo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.vhif9n h4 { color: #fff; margin-bottom: 8px; }
.vhif9n p { font-size: 0.83rem; color: var(--text-muted); margin: 0; }

/* ============ Stats Banner ============ */
.x81mz3 {
  background: linear-gradient(135deg, #1a3a6e 0%, #0a0a0f 100%);
  border-top: 1px solid var(--dark-border);
  border-bottom: 1px solid var(--dark-border);
}
.e5cqun {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.grw0zm {
  padding: 36px 20px;
  text-align: center;
  border-right: 1px solid var(--dark-border);
}
.grw0zm:last-child { border-right: none; }
.grw0zm .num {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 900;
  color: var(--primary);
  display: block;
  margin-bottom: 6px;
}
.grw0zm .label { font-size: 0.85rem; color: var(--text-muted); }

/* ============ Breadcrumb ============ */
.breadcrumb {
  padding: 14px 0;
  background: var(--dark-card);
  border-bottom: 1px solid var(--dark-border);
}
.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb-inner a { color: var(--text-muted); }
.breadcrumb-inner a:hover { color: var(--primary); }
.breadcrumb-inner .sep { color: var(--dark-border); }
.breadcrumb-inner .current { color: var(--primary); }

/* ============ Tags ============ */
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 14px;
  border: 1px solid var(--dark-border);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.tag:hover, .tag.active { color: var(--primary); border-color: var(--primary); background: rgba(232,160,32,0.08); }

/* ============ Tabs ============ */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--dark-border); margin-bottom: 28px; }
.tab-btn {
  padding: 10px 20px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  margin-bottom: -1px;
}
.tab-btn.active, .tab-btn:hover { color: var(--primary); border-bottom-color: var(--primary); }

/* ============ Footer ============ */
#footer {
  background: #060610;
  border-top: 1px solid var(--dark-border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--dark-border);
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.8; }
.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--dark-border);
}
.footer-col ul li { margin-bottom: 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(--primary); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright { font-size: 0.82rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 0.82rem; color: var(--text-muted); }
.footer-links a:hover { color: var(--primary); }
.footer-update { font-size: 0.78rem; color: var(--text-muted); }

/* ============ Page Header ============ */
.page-header {
  padding: 100px 0 50px;
  background: linear-gradient(180deg, #12121e 0%, #0a0a0f 100%);
  text-align: center;
  border-bottom: 1px solid var(--dark-border);
}
.page-header h1 { margin-bottom: 12px; }
.page-header p { color: var(--text-muted); max-width: 600px; margin: 0 auto; }

/* ============ Sidebar ============ */
.sidebar-card {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  padding: 20px;
  margin-bottom: 20px;
}
.sidebar-card h5 {
  font-size: 0.95rem;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--dark-border);
}

/* ============ Notification Bar ============ */
.i8tx70c {
  background: linear-gradient(90deg, var(--primary) 0%, #ff6b35 100%);
  padding: 8px 0;
  text-align: center;
  font-size: 0.82rem;
  color: #fff;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* ============ Scrollbar ============ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--dark-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ============ Utility Classes ============ */
.text-primary { color: var(--primary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-white { color: #fff !important; }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; } .mb-4 { margin-bottom: 32px; }
.bg-dark { background: var(--dark); }
.bg-card { background: var(--dark-card); }
.rounded { border-radius: var(--radius); }
.border { border: 1px solid var(--dark-border); }
.w-100 { width: 100%; }
.d-none { display: none; }
.hidden { display: none !important; }

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .e5cqun { grid-template-columns: repeat(2, 1fr); }
  .grw0zm { border-right: none; border-bottom: 1px solid var(--dark-border); }
}
@media (max-width: 768px) {
  .section { padding: 50px 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px; left: 0; right: 0;
    background: rgba(10,10,15,0.98);
    padding: 16px;
    border-bottom: 1px solid var(--dark-border);
    gap: 4px;
  }
  .nav-toggle { display: flex; }
  .hero { padding-top: 140px; min-height: auto; padding-bottom: 60px; }
  .hero-stats { gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .e5cqun { grid-template-columns: repeat(2, 1fr); }
  .qi0ye { display: none; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ============ Animations ============ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.animate-fade-up { animation: fadeInUp 0.6s ease forwards; }
.loading-skeleton {
  background: linear-gradient(90deg, #1a1a2e 25%, #252540 50%, #1a1a2e 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ============ Video Modal ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal-content {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  width: 90%;
  max-width: 800px;
  overflow: hidden;
}
.modal-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--dark-border);
}
.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--dark-border);
  border: none;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-video { aspect-ratio: 16/9; background: #000; }
.modal-video video { width: 100%; height: 100%; object-fit: cover; }

/* ============ Footer Badges（EEAT资质展示） ============ */
.c4l94xf {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0;
}
.n9qdx {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(232,160,32,0.12);
  border: 1px solid rgba(232,160,32,0.3);
  color: var(--primary);
  border-radius: 4px;
  font-weight: 600;
}

/* ============ KW Dense Bar（关键词密度补充） ============ */
.b2fs78z7 {
  background: #060610;
  border-top: 1px solid var(--dark-border);
  padding: 0;
}
.b2fs78z7 a {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: 4px;
  transition: var(--transition);
  white-space: nowrap;
}
.b2fs78z7 a:hover { color: var(--primary); }

/* ============ Breadcrumb（面包屑导航，EEAT结构化） ============ */
.breadcrumb-nav {
  padding: 12px 0;
  background: #0d0d1a;
  border-bottom: 1px solid var(--dark-border);
  font-size: 0.82rem;
}
.breadcrumb-nav .container {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb-nav a { color: var(--text-muted); }
.breadcrumb-nav a:hover { color: var(--primary); }
.breadcrumb-nav .sep { color: #333; }
.breadcrumb-nav .current { color: var(--primary); font-weight: 600; }

/* ============ About Page ============ */
.about-hero {
  padding: 100px 0 60px;
  background: linear-gradient(180deg, #12121e 0%, #0a0a0f 100%);
  text-align: center;
}
.about-section { padding: 70px 0; }
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
}
.timeline-item {
  position: relative;
  margin-bottom: 36px;
  padding-left: 20px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px; top: 6px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #0a0a0f;
}
.timeline-year {
  font-size: 0.78rem;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 4px;
}
.timeline-title { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.timeline-text { font-size: 0.85rem; color: var(--text-muted); }

/* ============ Sitemap Page ============ */
.sitemap-section { padding: 80px 0; }
.sitemap-group { margin-bottom: 40px; }
.sitemap-group h3 {
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--dark-border);
}
.sitemap-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.sitemap-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 8px 12px;
  background: var(--dark-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--dark-border);
  transition: var(--transition);
  display: block;
}
.sitemap-links a:hover { color: var(--primary); border-color: var(--primary); }

/* ============ 404 Page ============ */
.error-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
}
.error-code {
  font-size: clamp(5rem, 15vw, 10rem);
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 20px;
  text-shadow: 0 0 60px rgba(232,160,32,0.4);
}
.error-title { font-size: 1.5rem; color: #fff; margin-bottom: 16px; }
.error-desc { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }

/* ============ Video Tag Labels（视频标签，百度视频收录） ============ */
.wsa57og {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
  padding: 12px 16px;
  background: rgba(232,160,32,0.05);
  border: 1px solid rgba(232,160,32,0.15);
  border-radius: var(--radius-sm);
}
.o0j6g {
  font-size: 0.75rem;
  padding: 3px 10px;
  background: rgba(232,160,32,0.12);
  color: var(--primary);
  border-radius: 12px;
  font-weight: 600;
}

/* ============ EEAT Expert Profile（专家权威信号） ============ */
.lwotov {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--dark-card);
  border: 1px solid var(--dark-border);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}
.eeat-expert-avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
  flex-shrink: 0;
}
.eeat-expert-info { flex: 1; }
.eeat-expert-name { font-size: 0.95rem; font-weight: 700; color: #fff; }
.eeat-expert-role { font-size: 0.78rem; color: var(--primary); }
.gga5k6d { font-size: 0.72rem; color: var(--text-muted); margin-top: 2px; }

/* ============ Video Schema Markup（百度视频收录辅助） ============ */
.s8duxp4 {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 6px;
  line-height: 1.5;
}

/* ============ 响应式补充 ============ */
@media (max-width: 768px) {
  .b2fs78z7 nav { gap: 6px; }
  .c4l94xf { gap: 6px; }
  .lwotov { flex-direction: column; text-align: center; }
}