/* ===== 91网 - 潮流街头时尚风格 CSS ===== */
:root {
  --electric-blue: #00d4ff;
  --neon-pink: #ff2d78;
  --acid-green: #39ff14;
  --bright-orange: #ff8c00;
  --pure-black: #0a0a0f;
  --dark-bg: #0d0d1a;
  --card-bg: #12121f;
  --border-glow: rgba(0, 212, 255, 0.3);
  --text-primary: #ffffff;
  --text-secondary: #b0b0cc;
  --gradient-main: linear-gradient(135deg, #00d4ff 0%, #ff2d78 50%, #39ff14 100%);
  --gradient-card: linear-gradient(145deg, #12121f 0%, #1a1a2e 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background-color: var(--pure-black);
  color: var(--text-primary);
  overflow-x: hidden;
  line-height: 1.6;
}

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

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glow);
  padding: 0 5%;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-text {
  font-size: 1.8rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  text-shadow: none;
  filter: drop-shadow(0 0 8px rgba(0,212,255,0.5));
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.main-nav li a {
  display: block;
  padding: 8px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.3s ease;
  position: relative;
  white-space: nowrap;
}

.main-nav li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  transition: width 0.3s ease;
}

.main-nav li a:hover {
  color: var(--electric-blue);
}

.main-nav li a:hover::after {
  width: 80%;
}

.nav-cta {
  background: var(--gradient-main);
  color: #000 !important;
  border-radius: 20px;
  padding: 8px 18px !important;
  font-weight: 800 !important;
  transition: transform 0.2s, box-shadow 0.2s !important;
}

.nav-cta:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0,212,255,0.5);
  color: #000 !important;
}

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

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--electric-blue);
  transition: all 0.3s;
}

/* ===== 搜索框 ===== */
.search-bar-wrap {
  background: rgba(13, 13, 26, 0.95);
  border-bottom: 1px solid rgba(0,212,255,0.15);
  padding: 10px 5%;
}

.search-bar-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.search-input {
  width: 100%;
  background: rgba(255,255,255,0.05);
  border: 1.5px solid rgba(0,212,255,0.3);
  border-radius: 30px;
  padding: 10px 50px 10px 20px;
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-input:focus {
  border-color: var(--electric-blue);
  box-shadow: 0 0 15px rgba(0,212,255,0.2);
}

.search-input::placeholder {
  color: rgba(255,255,255,0.4);
}

.search-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--gradient-main);
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: transform 0.2s;
}

.search-btn:hover {
  transform: translateY(-50%) scale(1.1);
}

/* ===== 主内容区 ===== */
main {
  position: relative;
  z-index: 1;
}

/* ===== Hero Banner ===== */
.hero-banner {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
  transform: scale(1.05);
  animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
  from { transform: scale(1.05); }
  to { transform: scale(1.12); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.7) 0%, rgba(0,212,255,0.08) 50%, rgba(255,45,120,0.08) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5%;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  background: rgba(0,212,255,0.15);
  border: 1px solid var(--electric-blue);
  border-radius: 20px;
  padding: 5px 16px;
  font-size: 0.8rem;
  color: var(--electric-blue);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0,212,255,0.4); }
  50% { box-shadow: 0 0 0 8px rgba(0,212,255,0); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  text-shadow: 0 0 30px rgba(0,212,255,0.3);
}

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

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.btn-primary {
  background: var(--gradient-main);
  color: #000;
  font-weight: 800;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: transform 0.2s, box-shadow 0.3s;
  letter-spacing: 0.5px;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0,212,255,0.4);
}

.btn-secondary {
  background: transparent;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  padding: 13px 30px;
  border-radius: 30px;
  border: 2px solid rgba(255,255,255,0.3);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s;
}

.btn-secondary:hover {
  border-color: var(--neon-pink);
  color: var(--neon-pink);
  box-shadow: 0 0 20px rgba(255,45,120,0.3);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 50px;
  flex-wrap: wrap;
}

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

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

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ===== 通用区块样式 ===== */
.section {
  padding: 80px 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.3);
  color: var(--electric-blue);
  font-size: 0.75rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  margin-bottom: 12px;
}

.section-title .accent {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

.video-card {
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  cursor: pointer;
  position: relative;
}

.video-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 60px rgba(0,212,255,0.25), 0 0 30px rgba(255,45,120,0.15);
  border-color: var(--electric-blue);
}

.video-thumb {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  overflow: hidden;
  background: #1a1a2e;
}

.video-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease, filter 0.3s ease;
}

.video-card:hover .video-thumb img {
  transform: scale(1.08);
  filter: brightness(0.7) saturate(1.3);
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 60px;
  height: 60px;
  background: rgba(0,212,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  z-index: 2;
}

.play-btn::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #000;
  margin-left: 4px;
}

.video-card:hover .play-btn {
  transform: translate(-50%, -50%) scale(1);
  box-shadow: 0 0 30px rgba(0,212,255,0.8), 0 0 60px rgba(0,212,255,0.4);
}

.video-glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.15) 0%, rgba(255,45,120,0.15) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.video-card:hover .video-glow {
  opacity: 1;
}

.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--neon-pink);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
  z-index: 3;
  letter-spacing: 1px;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

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

/* ===== 社区模块 ===== */
.community-section {
  background: linear-gradient(180deg, transparent 0%, rgba(0,212,255,0.03) 50%, transparent 100%);
  padding: 80px 0;
}

.community-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 5%;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.topic-card {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.3s;
  cursor: pointer;
}

.topic-card:hover {
  border-color: var(--neon-pink);
  box-shadow: 0 0 20px rgba(255,45,120,0.2);
  transform: translateY(-4px);
}

.topic-tag {
  font-size: 0.75rem;
  color: var(--neon-pink);
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.topic-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.topic-count {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ===== AI模块 ===== */
.ai-section {
  padding: 80px 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.ai-image-wrap {
  border-radius: 20px;
  overflow: hidden;
  position: relative;
}

.ai-image-wrap img {
  width: 100%;
  display: block;
  border-radius: 20px;
  filter: saturate(1.2);
}

.ai-image-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  border: 2px solid transparent;
  background: var(--gradient-main) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  opacity: 0.5;
}

.ai-tools {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 30px;
}

.ai-tool-card {
  background: var(--card-bg);
  border: 1px solid rgba(0,212,255,0.15);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.3s;
}

.ai-tool-card:hover {
  border-color: var(--electric-blue);
  box-shadow: 0 0 20px rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.ai-tool-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.ai-tool-name {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.ai-tool-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ===== 达人模块 ===== */
.creators-section {
  padding: 80px 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.creators-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 24px;
}

.creator-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px 16px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
}

.creator-card:hover {
  border-color: var(--acid-green);
  box-shadow: 0 0 25px rgba(57,255,20,0.2);
  transform: translateY(-6px);
}

.creator-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin: 0 auto 12px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 900;
  color: #000;
}

.creator-name {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.creator-tag {
  font-size: 0.75rem;
  color: var(--acid-green);
  margin-bottom: 10px;
}

.creator-fans {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ===== 用户评价 ===== */
.reviews-section {
  background: linear-gradient(180deg, transparent 0%, rgba(255,45,120,0.03) 50%, transparent 100%);
  padding: 80px 5%;
}

.reviews-inner {
  max-width: 1400px;
  margin: 0 auto;
}

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

.review-card {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s;
  position: relative;
}

.review-card::before {
  content: '"';
  position: absolute;
  top: 10px;
  right: 20px;
  font-size: 4rem;
  color: rgba(0,212,255,0.1);
  font-family: Georgia, serif;
  line-height: 1;
}

.review-card:hover {
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 0 20px rgba(0,212,255,0.1);
}

.review-stars {
  color: var(--bright-orange);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.9rem;
  color: #000;
  flex-shrink: 0;
}

.review-name {
  font-size: 0.9rem;
  font-weight: 700;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 5%;
  max-width: 900px;
  margin: 0 auto;
}

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

.faq-item {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.3s;
}

.faq-item.active {
  border-color: var(--electric-blue);
}

.faq-question {
  padding: 18px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: color 0.3s;
}

.faq-question:hover {
  color: var(--electric-blue);
}

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0,212,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: transform 0.3s, background 0.3s;
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--electric-blue);
  color: #000;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

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

/* ===== 合作伙伴 ===== */
.partners-section {
  padding: 80px 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.partners-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin-top: 30px;
}

.partner-logo {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 16px 28px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all 0.3s;
  cursor: pointer;
}

.partner-logo:hover {
  border-color: var(--electric-blue);
  color: var(--electric-blue);
  box-shadow: 0 0 15px rgba(0,212,255,0.2);
}

/* ===== 联系模块 ===== */
.contact-section {
  padding: 80px 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 30px;
}

.contact-card {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  transition: all 0.3s;
}

.contact-card:hover {
  border-color: var(--neon-pink);
  box-shadow: 0 0 25px rgba(255,45,120,0.15);
  transform: translateY(-4px);
}

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

.contact-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.contact-value {
  font-size: 1rem;
  font-weight: 700;
  word-break: break-all;
}

/* ===== 页脚 ===== */
.site-footer {
  background: rgba(5, 5, 10, 0.98);
  border-top: 1px solid rgba(0,212,255,0.15);
  padding: 50px 5% 30px;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
}

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

.footer-brand .logo-text {
  font-size: 1.5rem;
  margin-bottom: 12px;
  display: block;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.social-link {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--text-secondary);
  transition: all 0.3s;
}

.social-link:hover {
  background: var(--electric-blue);
  color: #000;
  border-color: var(--electric-blue);
  box-shadow: 0 0 15px rgba(0,212,255,0.4);
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: var(--electric-blue);
}

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

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer-icp {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ===== 内页面包屑 ===== */
.breadcrumb {
  padding: 16px 5%;
  max-width: 1400px;
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb span {
  margin: 0 8px;
  opacity: 0.5;
}

/* ===== 内页Hero ===== */
.inner-hero {
  padding: 60px 5% 40px;
  max-width: 1400px;
  margin: 0 auto;
  text-align: center;
}

.inner-hero h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 900;
  margin-bottom: 16px;
}

.inner-hero p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 滚动动画 ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10,10,15,0.98);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-glow);
    gap: 5px;
  }
  .main-nav.open {
    display: flex;
  }
  .hamburger {
    display: flex;
  }
  .hero-stats {
    gap: 20px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .ai-tools {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
  }
  .btn-primary, .btn-secondary {
    text-align: center;
    width: 100%;
  }
}

/* ===== 弹幕效果 ===== */
.danmaku-wrap {
  position: relative;
  height: 80px;
  overflow: hidden;
  background: rgba(0,0,0,0.3);
  border-radius: 12px;
  margin-top: 20px;
}

.danmaku-item {
  position: absolute;
  white-space: nowrap;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  animation: danmakuMove linear infinite;
}

@keyframes danmakuMove {
  from { transform: translateX(110vw); }
  to { transform: translateX(-110%); }
}

/* ===== 渐变分割线 ===== */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--electric-blue) 30%, var(--neon-pink) 70%, transparent 100%);
  margin: 0;
  opacity: 0.3;
}