/**
 * 溏心 - 主样式文件
 * 品牌：溏心 | 域名：bdwfnl.cn
 * 原创配色：深空紫黑 + 霓虹青 + 樱花粉
 */

/* ============================================================
   CSS 变量
   ============================================================ */
:root {
  --bg-main:        #0f0f1e;
  --bg-card:        #161628;
  --secondary:      #13132a;
  --border:         rgba(0,212,255,.15);
  --accent1:        #00d4ff;
  --accent2:        #ff006e;
  --accent3:        #ffd60a;
  --text-white:     #f0f0ff;
  --text-main:      #c8c8e8;
  --text-muted:     #8888aa;
  --gradient-main:  linear-gradient(135deg,#00d4ff,#ff006e);
  --gradient-gold:  linear-gradient(135deg,#ffd60a,#ff8c00);
  --radius:         12px;
  --radius-sm:      8px;
  --shadow:         0 4px 24px rgba(0,0,0,.4);
  --shadow-glow:    0 0 20px rgba(0,212,255,.2);
}

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

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

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

a { color: var(--accent1); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent2); }

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

ul { list-style: none; }

h1, h2, h3, h4, h5, h6 { color: var(--text-white); font-weight: 700; line-height: 1.3; }

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

.section { padding: 72px 0; }
.section-sm { padding: 36px 0; }

.section-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: .95rem;
  margin-bottom: 48px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* ============================================================
   头部 & 导航
   ============================================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15,15,30,.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

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

.site-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: .5px;
}

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

.main-nav a {
  color: var(--text-main);
  font-size: .88rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all .2s;
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--accent1);
  background: rgba(0,212,255,.1);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .3s;
}

/* 搜索栏 */
.search-bar-row {
  background: rgba(0,0,0,.3);
  border-top: 1px solid var(--border);
  padding: 8px 0;
}

.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 8px;
}

.search-bar-inner input {
  flex: 1;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 14px;
  color: var(--text-white);
  font-size: .87rem;
  outline: none;
  transition: border-color .2s;
}

.search-bar-inner input:focus { border-color: var(--accent1); }
.search-bar-inner input::placeholder { color: var(--text-muted); }

.search-bar-inner button {
  background: var(--gradient-main);
  border: none;
  border-radius: 6px;
  padding: 8px 20px;
  color: #fff;
  font-size: .87rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity .2s;
}

.search-bar-inner button:hover { opacity: .85; }

/* ============================================================
   Hero Banner
   ============================================================ */
#hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('../images/banners/hero_banner.jpg') center/cover no-repeat;
  transform: scale(1.05);
  transition: transform 8s ease;
}

#hero:hover .hero-bg { transform: scale(1); }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,rgba(15,15,30,.92) 0%,rgba(15,15,30,.7) 60%,rgba(255,0,110,.1) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,212,255,.1);
  border: 1px solid rgba(0,212,255,.3);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: .82rem;
  color: var(--accent1);
  margin-bottom: 20px;
}

.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent2);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text-white);
}

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

.hero-desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-stat .num {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  font-size: .78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 24px;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,212,255,.25);
}

.btn-primary:hover {
  opacity: .9;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,212,255,.35);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent1);
  border: 1px solid var(--accent1);
}

.btn-outline:hover {
  background: rgba(0,212,255,.1);
  transform: translateY(-1px);
}

.btn-sm { padding: 7px 16px; font-size: .82rem; }

/* ============================================================
   徽章
   ============================================================ */
.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  font-size: .72rem;
  font-weight: 600;
}

.badge-pink  { background: rgba(255,0,110,.2);  color: #ff6b9d; }
.badge-blue  { background: rgba(0,212,255,.15); color: var(--accent1); }
.badge-gold  { background: rgba(255,214,10,.15); color: var(--accent3); }

/* ============================================================
   视频卡片
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(0,212,255,.35);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a1a30;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}

.video-card:hover .video-thumb img { transform: scale(1.06); }

/* 播放按钮覆盖层 */
.play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.35);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .25s;
}

.video-card:hover .play-overlay { opacity: 1; }

.play-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(0,212,255,.9);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(0,212,255,.6);
  transform: scale(.85);
  transition: transform .2s;
}

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

.play-btn svg {
  width: 22px;
  height: 22px;
  fill: #fff;
  margin-left: 3px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,.75);
  color: #fff;
  font-size: .72rem;
  padding: 2px 6px;
  border-radius: 4px;
}

.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
}

.video-info { padding: 14px; }

.video-title {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  gap: 12px;
  font-size: .75rem;
  color: var(--text-muted);
}

/* ============================================================
   功能卡片
   ============================================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0,212,255,.3);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature-icon.pink  { background: rgba(255,0,110,.15); }
.feature-icon.blue  { background: rgba(0,212,255,.12); }
.feature-icon.gold  { background: rgba(255,214,10,.12); }

.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================================
   专家卡片
   ============================================================ */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: transform .25s, border-color .25s;
}

.expert-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255,0,110,.3);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 2px solid var(--border);
}

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

.expert-title {
  font-size: .78rem;
  color: var(--accent1);
  margin-bottom: 10px;
}

.expert-desc {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.expert-awards {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

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

/* ============================================================
   统计数字
   ============================================================ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  text-align: center;
}

.stat-item { padding: 20px; }

.stat-num {
  font-size: 2rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.stat-label { font-size: .82rem; color: var(--text-muted); }

/* ============================================================
   步骤卡片
   ============================================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.step-card h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 8px;
}

.step-card p {
  font-size: .83rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============================================================
   合作伙伴
   ============================================================ */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}

.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 12px;
  text-align: center;
  font-size: .85rem;
  color: var(--text-muted);
  font-weight: 600;
  transition: border-color .2s, color .2s;
}

.partner-item:hover {
  border-color: rgba(0,212,255,.3);
  color: var(--accent1);
}

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

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .2s;
}

.faq-item.open { border-color: rgba(0,212,255,.3); }

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 20px;
  cursor: pointer;
  font-size: .92rem;
  font-weight: 600;
  color: var(--text-white);
  user-select: none;
  gap: 12px;
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--accent1);
  flex-shrink: 0;
  transition: transform .25s;
}

.faq-item.open .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s;
  padding: 0 20px;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 20px 18px;
}

.faq-answer p {
  font-size: .87rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ============================================================
   评论卡片
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .25s, border-color .25s;
}

.review-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255,0,110,.25);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-user-info .name {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-white);
}

.review-user-info .date {
  font-size: .75rem;
  color: var(--text-muted);
}

.review-stars {
  color: var(--accent3);
  font-size: .9rem;
  margin-bottom: 10px;
}

.review-text {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.review-tag { margin-top: 8px; }

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

.contact-info h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.contact-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  width: 28px;
}

.contact-item .label {
  font-size: .75rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-item .value {
  font-size: .88rem;
  color: var(--text-main);
  font-weight: 500;
}

.community-entries {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.community-entry {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  transition: border-color .2s;
}

.community-entry:hover { border-color: rgba(0,212,255,.3); }

.entry-icon { font-size: 1.6rem; margin-bottom: 8px; }

.entry-name {
  font-size: .88rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 4px;
}

.entry-desc {
  font-size: .75rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ============================================================
   分享区域
   ============================================================ */
.share-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.share-section h4 {
  font-size: .9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.share-buttons { display: flex; gap: 10px; flex-wrap: wrap; }

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 6px;
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  transition: all .2s;
}

.share-btn:hover { border-color: var(--accent1); color: var(--accent1); }

/* ============================================================
   底部
   ============================================================ */
#site-footer {
  background: var(--secondary);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-brand .logo-wrap img {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  object-fit: cover;
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.footer-qr img {
  width: 72px;
  height: 72px;
  border-radius: 6px;
  border: 1px solid var(--border);
  object-fit: cover;
}

.footer-qr p {
  font-size: .72rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 4px;
}

.footer-col h4 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  font-size: .83rem;
  color: var(--text-muted);
  transition: color .2s;
}

.footer-col ul li a:hover { color: var(--accent1); }

.social-links { display: flex; gap: 8px; }

.social-link {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .78rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: all .2s;
}

.social-link:hover {
  border-color: var(--accent1);
  color: var(--accent1);
  background: rgba(0,212,255,.08);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.copyright { font-size: .78rem; color: var(--text-muted); }

.update-time {
  font-size: .78rem;
  color: var(--text-muted);
  background: rgba(0,212,255,.08);
  border: 1px solid rgba(0,212,255,.15);
  padding: 4px 12px;
  border-radius: 4px;
}

/* ============================================================
   弹幕
   ============================================================ */
.danmaku-container {
  position: relative;
  height: 36px;
  overflow: hidden;
}

.danmaku-item {
  position: absolute;
  right: -300px;
  white-space: nowrap;
  font-size: .8rem;
  animation: danmaku-move linear forwards;
  pointer-events: none;
}

@keyframes danmaku-move {
  from { right: -300px; }
  to   { right: 110%; }
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent1); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--accent1); }

/* ============================================================
   分类标签
   ============================================================ */
.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.filter-tab {
  padding: 7px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: .83rem;
  cursor: pointer;
  transition: all .2s;
}

.filter-tab:hover,
.filter-tab.active {
  background: rgba(0,212,255,.12);
  border-color: var(--accent1);
  color: var(--accent1);
}

/* ============================================================
   页面Banner（内页）
   ============================================================ */
.page-banner {
  background: linear-gradient(135deg, rgba(0,212,255,.08) 0%, rgba(255,0,110,.06) 100%);
  border-bottom: 1px solid var(--border);
  padding: 52px 0;
  text-align: center;
}

.page-banner h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}

.page-banner p {
  color: var(--text-muted);
  font-size: .95rem;
}

/* ============================================================
   通用卡片
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform .25s, border-color .25s;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(0,212,255,.3);
}

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@media (max-width: 768px) {
  .section { padding: 48px 0; }

  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15,15,30,.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    z-index: 999;
  }

  .main-nav.open { display: flex; }

  .main-nav a { font-size: 1.1rem; padding: 10px 24px; }

  .menu-toggle { display: flex; z-index: 1000; }

  .hero-stats { gap: 20px; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }

  .footer-bottom { flex-direction: column; text-align: center; }

  .video-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }

  .feature-grid { grid-template-columns: 1fr; }

  .experts-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }

  .reviews-grid { grid-template-columns: 1fr; }

  .partners-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }

  .steps-grid { grid-template-columns: 1fr 1fr; }

  .share-section { flex-direction: column; gap: 12px; }

  .community-entries { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .steps-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .community-entries { grid-template-columns: 1fr; }
}