/* ========================================
   抖荫短视频 - 修车改装视频社区 主样式
   Brand: 抖荫短视频 | cbskwl.cn
   原创配色：工业橙 + 碳黑 + 钢铁灰
   ======================================== */

/* CSS变量 */
:root {
  --orange:       #ff6a00;
  --orange-dark:  #cc4e00;
  --orange-light: #ff9340;
  --orange-glow:  rgba(255,106,0,0.25);
  --black:        #0a0a0a;
  --dark:         #111111;
  --card-bg:      #181818;
  --card-border:  #2a2a2a;
  --steel:        #1e1e1e;
  --text-white:   #f0f0f0;
  --text-light:   #c8c8c8;
  --text-muted:   #888888;
  --gradient-main: linear-gradient(135deg, #ff6a00 0%, #cc4e00 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #181818 100%);
  --shadow-card:  0 6px 28px rgba(0,0,0,0.55);
  --shadow-hover: 0 12px 40px rgba(255,106,0,0.25);
  --radius-sm:    6px;
  --radius-md:    12px;
  --radius-lg:    20px;
  --transition:   all 0.28s cubic-bezier(0.4,0,0.2,1);
}

/* 重置 */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; font-size:16px; }
body {
  font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB',sans-serif;
  background-color:var(--black);
  color:var(--text-white);
  line-height:1.65;
  overflow-x:hidden;
}
a { color:inherit; text-decoration:none; transition:var(--transition); }
img { max-width:100%; height:auto; display:block; }
ul,ol { list-style:none; }

/* ========================================
   通用工具
   ======================================== */
.container { max-width:1240px; margin:0 auto; padding:0 20px; }

.section { padding:72px 0; }
.section-dark { background:var(--steel); padding:72px 0; }
.section-black { background:var(--black); padding:72px 0; }

.section-title {
  font-size:clamp(1.6rem,3vw,2.4rem);
  font-weight:800;
  text-align:center;
  margin-bottom:10px;
  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;
}

.btn-primary {
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--gradient-main);
  color:#fff;
  padding:11px 26px;
  border-radius:50px;
  font-weight:700;
  font-size:.9rem;
  border:none;
  cursor:pointer;
  transition:var(--transition);
  box-shadow:0 4px 16px var(--orange-glow);
}
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 28px var(--orange-glow); }

.btn-outline {
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:transparent;
  color:var(--orange);
  padding:10px 24px;
  border-radius:50px;
  font-weight:700;
  font-size:.9rem;
  border:2px solid var(--orange);
  cursor:pointer;
  transition:var(--transition);
}
.btn-outline:hover { background:var(--orange); color:#fff; }

.tag {
  display:inline-block;
  background:rgba(255,106,0,.12);
  color:var(--orange-light);
  border:1px solid rgba(255,106,0,.3);
  border-radius:4px;
  padding:3px 10px;
  font-size:.78rem;
  font-weight:600;
}

/* ========================================
   顶部公告栏
   ======================================== */
.top-notice {
  background:var(--gradient-main);
  text-align:center;
  padding:8px 20px;
  font-size:.82rem;
  font-weight:600;
  color:#fff;
  letter-spacing:.5px;
}
.top-notice a { color:#fff; text-decoration:underline; }

/* ========================================
   导航栏
   ======================================== */
.navbar {
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(10,10,10,.96);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--card-border);
}
.navbar-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:64px;
}
.navbar-brand {
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1.5rem;
  font-weight:900;
  color:var(--orange);
  letter-spacing:-1px;
}
.navbar-brand img { width:36px; height:36px; border-radius:8px; }
.brand-name { color:var(--orange); }

.nav-links {
  display:flex;
  gap:4px;
  align-items:center;
}
.nav-links a {
  padding:6px 14px;
  border-radius:6px;
  font-size:.88rem;
  font-weight:600;
  color:var(--text-light);
  transition:var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color:var(--orange); background:rgba(255,106,0,.1); }

.nav-actions { display:flex; align-items:center; gap:12px; }
.nav-live-btn {
  display:flex;
  align-items:center;
  gap:6px;
  background:rgba(255,106,0,.15);
  border:1px solid var(--orange);
  color:var(--orange);
  padding:6px 14px;
  border-radius:50px;
  font-size:.82rem;
  font-weight:700;
  cursor:pointer;
  transition:var(--transition);
}
.nav-live-btn:hover { background:var(--orange); color:#fff; }
.live-pulse {
  width:8px; height:8px;
  background:var(--orange);
  border-radius:50%;
  animation:pulse 1.4s infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50% { opacity:.5; transform:scale(1.4); }
}

.hamburger {
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;
  border:none;
  cursor:pointer;
  padding:4px;
}
.hamburger span {
  display:block;
  width:24px;
  height:2px;
  background:var(--text-white);
  border-radius:2px;
  transition:var(--transition);
}

/* ========================================
   搜索栏
   ======================================== */
.search-bar-wrap {
  background:var(--dark);
  border-bottom:1px solid var(--card-border);
  padding:12px 0;
}
.search-form {
  display:flex;
  max-width:640px;
  margin:0 auto;
  gap:0;
}
.search-input {
  flex:1;
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-right:none;
  border-radius:8px 0 0 8px;
  color:var(--text-white);
  padding:10px 16px;
  font-size:.9rem;
  outline:none;
  transition:var(--transition);
}
.search-input:focus { border-color:var(--orange); }
.search-input::placeholder { color:var(--text-muted); }
.search-btn {
  background:var(--gradient-main);
  border:none;
  border-radius:0 8px 8px 0;
  color:#fff;
  padding:10px 20px;
  font-size:.9rem;
  font-weight:700;
  cursor:pointer;
  transition:var(--transition);
}
.search-btn:hover { opacity:.88; }
.search-hot {
  display:flex;
  align-items:center;
  gap:8px;
  max-width:640px;
  margin:8px auto 0;
  font-size:.8rem;
  color:var(--text-muted);
  flex-wrap:wrap;
}
.search-hot a {
  color:var(--text-muted);
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:4px;
  padding:2px 8px;
  transition:var(--transition);
}
.search-hot a:hover { color:var(--orange); border-color:var(--orange); }

/* ========================================
   Hero 首屏
   ======================================== */
.hero {
  position:relative;
  min-height:580px;
  display:flex;
  align-items:center;
  overflow:hidden;
}
.hero-bg {
  position:absolute;
  inset:0;
  z-index:0;
}
.hero-bg img {
  width:100%;
  height:100%;
  object-fit:cover;
  opacity:.45;
}
.hero-overlay {
  position:absolute;
  inset:0;
  background:linear-gradient(135deg, rgba(10,10,10,.85) 0%, rgba(10,10,10,.5) 60%, rgba(255,106,0,.08) 100%);
  z-index:1;
}
.hero-content {
  position:relative;
  z-index:2;
  max-width:700px;
}
.hero-badge {
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,106,0,.15);
  border:1px solid rgba(255,106,0,.4);
  border-radius:50px;
  padding:6px 16px;
  font-size:.82rem;
  font-weight:700;
  color:var(--orange-light);
  margin-bottom:20px;
}
.hero h1 {
  font-size:clamp(2rem,5vw,3.4rem);
  font-weight:900;
  line-height:1.15;
  margin-bottom:18px;
  letter-spacing:-1px;
}
.hero h1 .hl { color:var(--orange); }
.hero-desc {
  font-size:1rem;
  color:var(--text-light);
  margin-bottom:28px;
  line-height:1.75;
  max-width:580px;
}
.hero-actions { display:flex; gap:14px; flex-wrap:wrap; margin-bottom:36px; }
.hero-stats {
  display:flex;
  gap:32px;
  flex-wrap:wrap;
}
.hero-stat { text-align:center; }
.hero-stat .num {
  display:block;
  font-size:1.6rem;
  font-weight:900;
  color:var(--orange);
  line-height:1;
}
.hero-stat .lbl {
  font-size:.78rem;
  color:var(--text-muted);
  margin-top:4px;
}

/* ========================================
   统计数字带
   ======================================== */
.stats-band {
  background:var(--gradient-main);
  padding:28px 0;
}
.stats-band-grid {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  text-align:center;
}
.stats-band-item .num {
  font-size:2rem;
  font-weight:900;
  color:#fff;
  line-height:1;
}
.stats-band-item .lbl {
  font-size:.8rem;
  color:rgba(255,255,255,.75);
  margin-top:4px;
}

/* ========================================
   视频卡片
   ======================================== */
.video-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:22px;
}
.video-card {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:var(--transition);
  cursor:pointer;
}
.video-card:hover {
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:rgba(255,106,0,.4);
}
.video-thumb {
  position:relative;
  overflow:hidden;
  aspect-ratio:16/9;
  background:#000;
}
.video-thumb img {
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.video-card:hover .video-thumb img { transform:scale(1.06); }
.play-btn-overlay {
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(0,0,0,.35);
  opacity:0;
  transition:var(--transition);
}
.video-card:hover .play-btn-overlay { opacity:1; }
.play-circle {
  width:54px;
  height:54px;
  background:rgba(255,106,0,.9);
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 0 24px rgba(255,106,0,.6);
}
.play-circle svg { width:22px; height:22px; fill:#fff; margin-left:3px; }
.vid-duration {
  position:absolute;
  bottom:8px;
  right:8px;
  background:rgba(0,0,0,.75);
  color:#fff;
  font-size:.72rem;
  font-weight:700;
  padding:2px 7px;
  border-radius:4px;
}
.vid-quality {
  position:absolute;
  top:8px;
  left:8px;
  background:var(--orange);
  color:#fff;
  font-size:.68rem;
  font-weight:800;
  padding:2px 6px;
  border-radius:4px;
}
.vid-live {
  position:absolute;
  top:8px;
  right:8px;
  background:#e03030;
  color:#fff;
  font-size:.68rem;
  font-weight:800;
  padding:2px 8px;
  border-radius:4px;
  animation:pulse 1.4s infinite;
}
.video-info { padding:14px; }
.video-title {
  font-size:.9rem;
  font-weight:700;
  line-height:1.45;
  margin-bottom:10px;
  color:var(--text-white);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.video-meta {
  display:flex;
  align-items:center;
  gap:8px;
  font-size:.78rem;
  color:var(--text-muted);
}
.video-author-av {
  width:26px;
  height:26px;
  border-radius:50%;
  background:var(--gradient-main);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.72rem;
  font-weight:800;
  color:#fff;
  flex-shrink:0;
}
.video-stats {
  display:flex;
  gap:12px;
  margin-top:8px;
  font-size:.76rem;
  color:var(--text-muted);
}

/* ========================================
   分类标签
   ======================================== */
.cat-tabs {
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  margin-bottom:28px;
}
.cat-tab {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  color:var(--text-muted);
  padding:7px 16px;
  border-radius:50px;
  font-size:.84rem;
  font-weight:600;
  cursor:pointer;
  transition:var(--transition);
}
.cat-tab:hover,
.cat-tab.active {
  background:var(--orange);
  border-color:var(--orange);
  color:#fff;
}

/* ========================================
   特性卡片
   ======================================== */
.features-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
  gap:20px;
}
.feature-card {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-md);
  padding:28px 22px;
  transition:var(--transition);
}
.feature-card:hover {
  border-color:rgba(255,106,0,.4);
  box-shadow:var(--shadow-hover);
  transform:translateY(-3px);
}
.feature-icon {
  font-size:2.2rem;
  margin-bottom:14px;
}
.feature-card h3 {
  font-size:1rem;
  font-weight:800;
  margin-bottom:8px;
  color:var(--text-white);
}
.feature-card p {
  font-size:.85rem;
  color:var(--text-muted);
  line-height:1.65;
}

/* ========================================
   AI 卡片
   ======================================== */
.ai-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:20px;
}
.ai-card {
  background:linear-gradient(145deg,#1a1a1a,#111);
  border:1px solid rgba(255,106,0,.2);
  border-radius:var(--radius-md);
  padding:28px 22px;
  position:relative;
  overflow:hidden;
  transition:var(--transition);
}
.ai-card::before {
  content:'';
  position:absolute;
  top:-40px;
  right:-40px;
  width:100px;
  height:100px;
  background:radial-gradient(circle,rgba(255,106,0,.15),transparent 70%);
  border-radius:50%;
}
.ai-card:hover { border-color:rgba(255,106,0,.5); transform:translateY(-3px); }
.ai-icon { font-size:2rem; margin-bottom:12px; display:block; }
.ai-card h3 { font-size:1rem; font-weight:800; margin-bottom:8px; }
.ai-card p { font-size:.84rem; color:var(--text-muted); line-height:1.65; }

/* ========================================
   专家卡片
   ======================================== */
.experts-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:22px;
}
.expert-card {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-md);
  padding:28px 22px;
  text-align:center;
  transition:var(--transition);
}
.expert-card:hover { border-color:rgba(255,106,0,.4); box-shadow:var(--shadow-hover); }
.expert-av {
  width:88px;
  height:88px;
  border-radius:50%;
  overflow:hidden;
  margin:0 auto 16px;
  border:3px solid var(--orange);
}
.expert-av img { width:100%; height:100%; object-fit:cover; }
.expert-name { font-size:1.05rem; font-weight:800; margin-bottom:4px; }
.expert-role { font-size:.82rem; color:var(--orange); margin-bottom:10px; font-weight:600; }
.expert-desc { font-size:.83rem; color:var(--text-muted); line-height:1.6; margin-bottom:14px; }
.expert-awards { display:flex; flex-wrap:wrap; gap:6px; justify-content:center; margin-bottom:16px; }
.expert-actions { display:flex; gap:8px; justify-content:center; flex-wrap:wrap; }

/* ========================================
   合作品牌
   ======================================== */
.partners-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(140px,1fr));
  gap:14px;
}
.partner-item {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-sm);
  padding:16px 12px;
  text-align:center;
  font-size:.84rem;
  font-weight:700;
  color:var(--text-muted);
  transition:var(--transition);
}
.partner-item:hover { color:var(--orange); border-color:rgba(255,106,0,.4); }

/* ========================================
   加入步骤
   ======================================== */
.steps-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:20px;
}
.step-card {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-md);
  padding:28px 20px;
  text-align:center;
}
.step-num {
  width:48px;
  height:48px;
  border-radius:50%;
  background:var(--gradient-main);
  color:#fff;
  font-size:1.3rem;
  font-weight:900;
  display:flex;
  align-items:center;
  justify-content:center;
  margin:0 auto 14px;
}
.step-card h3 { font-size:.95rem; font-weight:800; margin-bottom:8px; }
.step-card p { font-size:.83rem; color:var(--text-muted); line-height:1.6; }

/* ========================================
   联系区域
   ======================================== */
.contact-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:start;
}
.contact-info h3 { font-size:1.2rem; font-weight:800; margin-bottom:20px; color:var(--orange); }
.contact-item {
  display:flex;
  gap:14px;
  align-items:flex-start;
  margin-bottom:18px;
}
.contact-icon { font-size:1.3rem; flex-shrink:0; margin-top:2px; }
.contact-item h4 { font-size:.88rem; font-weight:700; margin-bottom:3px; }
.contact-item p, .contact-item a { font-size:.85rem; color:var(--text-muted); }
.contact-item a:hover { color:var(--orange); }

.qr-wrap { display:flex; gap:24px; flex-wrap:wrap; justify-content:center; }
.qr-item { text-align:center; }
.qr-item img { width:120px; height:120px; border-radius:8px; border:2px solid var(--card-border); margin-bottom:8px; }
.qr-item p { font-size:.78rem; color:var(--text-muted); }
.qr-item span { font-size:.72rem; color:var(--orange); }

/* ========================================
   评价卡片
   ======================================== */
.reviews-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:20px;
}
.review-card {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-md);
  padding:22px;
  transition:var(--transition);
}
.review-card:hover { border-color:rgba(255,106,0,.3); }
.review-header { display:flex; align-items:center; gap:12px; margin-bottom:12px; }
.reviewer-av {
  width:42px;
  height:42px;
  border-radius:50%;
  background:var(--gradient-main);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  font-weight:800;
  color:#fff;
  flex-shrink:0;
}
.reviewer-name { font-size:.9rem; font-weight:700; }
.reviewer-loc { font-size:.76rem; color:var(--text-muted); }
.review-stars { color:#f59e0b; font-size:1rem; margin-bottom:10px; }
.review-text { font-size:.85rem; color:var(--text-light); line-height:1.65; margin-bottom:10px; }
.review-badge {
  display:inline-block;
  background:rgba(255,106,0,.1);
  color:var(--orange-light);
  border:1px solid rgba(255,106,0,.25);
  border-radius:4px;
  padding:2px 8px;
  font-size:.74rem;
  font-weight:600;
}

/* ========================================
   FAQ
   ======================================== */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-sm);
  margin-bottom:10px;
  overflow:hidden;
}
.faq-q {
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:16px 20px;
  font-size:.92rem;
  font-weight:700;
  cursor:pointer;
  transition:var(--transition);
  user-select:none;
}
.faq-q:hover { color:var(--orange); }
.faq-q .faq-icon { font-size:1.2rem; color:var(--orange); transition:var(--transition); }
.faq-item.open .faq-icon { transform:rotate(45deg); }
.faq-a {
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
  padding:0 20px;
  font-size:.86rem;
  color:var(--text-muted);
  line-height:1.7;
}
.faq-item.open .faq-a { max-height:300px; padding-bottom:16px; }

/* ========================================
   分享区
   ======================================== */
.share-section { background:var(--dark); padding:40px 0; border-top:1px solid var(--card-border); }
.share-section h3 { text-align:center; font-size:1rem; font-weight:700; margin-bottom:18px; color:var(--text-muted); }
.share-btns { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }
.share-btn {
  display:flex;
  align-items:center;
  gap:6px;
  padding:9px 18px;
  border-radius:50px;
  font-size:.84rem;
  font-weight:700;
  border:1px solid var(--card-border);
  background:var(--card-bg);
  color:var(--text-light);
  cursor:pointer;
  transition:var(--transition);
}
.share-btn:hover { border-color:var(--orange); color:var(--orange); }
.share-tip {
  text-align:center;
  margin-top:12px;
  font-size:.8rem;
  color:var(--text-muted);
  display:none;
}

/* ========================================
   页脚
   ======================================== */
.footer { background:var(--dark); border-top:1px solid var(--card-border); padding:48px 0 0; }
.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  margin-bottom:40px;
}
.footer-brand img { width:44px; height:44px; margin-bottom:12px; border-radius:8px; }
.footer-brand .brand-name { font-size:1.3rem; font-weight:900; color:var(--orange); display:block; margin-bottom:10px; }
.footer-brand p { font-size:.83rem; color:var(--text-muted); line-height:1.65; margin-bottom:14px; }
.footer-social { display:flex; gap:10px; }
.footer-social a {
  width:34px;
  height:34px;
  border-radius:8px;
  background:var(--card-bg);
  border:1px solid var(--card-border);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  transition:var(--transition);
}
.footer-social a:hover { border-color:var(--orange); background:rgba(255,106,0,.1); }

.footer-col h4 { font-size:.9rem; font-weight:800; margin-bottom:16px; color:var(--text-white); }
.footer-col ul li { margin-bottom:8px; }
.footer-col ul a { font-size:.83rem; color:var(--text-muted); transition:var(--transition); }
.footer-col ul a:hover { color:var(--orange); }

.footer-qr { display:flex; gap:24px; justify-content:center; margin-bottom:32px; flex-wrap:wrap; }

.footer-bottom {
  border-top:1px solid var(--card-border);
  padding:20px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:12px;
}
.footer-bottom p { font-size:.8rem; color:var(--text-muted); }
.footer-links { display:flex; gap:16px; flex-wrap:wrap; }
.footer-links a { font-size:.8rem; color:var(--text-muted); transition:var(--transition); }
.footer-links a:hover { color:var(--orange); }

/* ========================================
   面包屑
   ======================================== */
.breadcrumb {
  display:flex;
  align-items:center;
  gap:6px;
  font-size:.82rem;
  color:var(--text-muted);
  padding:14px 0;
}
.breadcrumb a { color:var(--text-muted); transition:var(--transition); }
.breadcrumb a:hover { color:var(--orange); }
.breadcrumb .sep { color:var(--card-border); }
.breadcrumb .cur { color:var(--orange); font-weight:600; }

/* ========================================
   页面Banner
   ======================================== */
.page-banner {
  position:relative;
  min-height:260px;
  display:flex;
  align-items:center;
  overflow:hidden;
}
.page-banner-bg {
  position:absolute;
  inset:0;
}
.page-banner-bg img { width:100%; height:100%; object-fit:cover; opacity:.3; }
.page-banner-overlay {
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(10,10,10,.9),rgba(10,10,10,.6));
}
.page-banner-content {
  position:relative;
  z-index:1;
}
.page-banner h1 { font-size:clamp(1.8rem,4vw,2.8rem); font-weight:900; margin-bottom:8px; }
.page-banner h1 span { color:var(--orange); }
.page-banner p { font-size:.95rem; color:var(--text-muted); }

/* ========================================
   返回顶部
   ======================================== */
#back-to-top {
  position:fixed;
  bottom:28px;
  right:22px;
  width:42px;
  height:42px;
  background:var(--gradient-main);
  border:none;
  border-radius:50%;
  color:#fff;
  font-size:1.1rem;
  cursor:pointer;
  opacity:0;
  pointer-events:none;
  transition:opacity .3s,transform .3s;
  box-shadow:0 4px 16px var(--orange-glow);
  z-index:999;
}
#back-to-top.show { opacity:1; pointer-events:auto; }
#back-to-top:hover { transform:scale(1.1); }

/* ========================================
   视频弹窗
   ======================================== */
#video-modal {
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.88);
  z-index:9999;
  display:none;
  align-items:center;
  justify-content:center;
  backdrop-filter:blur(8px);
}
#video-modal.open { display:flex; }
.modal-box {
  background:var(--card-bg);
  border:1px solid rgba(255,106,0,.3);
  border-radius:var(--radius-lg);
  padding:36px;
  max-width:520px;
  width:90%;
  text-align:center;
  position:relative;
}
.modal-close {
  position:absolute;
  top:12px;
  right:16px;
  background:none;
  border:none;
  color:var(--text-muted);
  font-size:1.5rem;
  cursor:pointer;
  line-height:1;
}
.modal-close:hover { color:var(--orange); }
.modal-play-icon { font-size:3.5rem; margin-bottom:16px; }
.modal-title { font-size:1rem; font-weight:700; margin-bottom:10px; }
.modal-desc { font-size:.85rem; color:var(--text-muted); margin-bottom:22px; line-height:1.65; }
.modal-actions { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }

/* ========================================
   Section Header
   ======================================== */
.section-header {
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  margin-bottom:28px;
  flex-wrap:wrap;
  gap:12px;
}
.section-header-left h2 { font-size:clamp(1.3rem,2.5vw,1.9rem); font-weight:800; margin-bottom:4px; }
.section-header-left h2 .brand { color:var(--orange); }
.section-header-left p { font-size:.85rem; color:var(--text-muted); }
.view-all { font-size:.84rem; font-weight:700; color:var(--orange); white-space:nowrap; }
.view-all:hover { text-decoration:underline; }

/* ========================================
   响应式
   ======================================== */
@media (max-width:1024px) {
  .footer-grid { grid-template-columns:1fr 1fr; }
  .contact-grid { grid-template-columns:1fr; }
}
@media (max-width:768px) {
  .nav-links { display:none; position:absolute; top:64px; left:0; right:0; background:rgba(10,10,10,.98); flex-direction:column; padding:16px; border-bottom:1px solid var(--card-border); }
  .nav-links.open { display:flex; }
  .hamburger { display:flex; }
  .hero { min-height:420px; }
  .hero h1 { font-size:1.8rem; }
  .stats-band-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr; }
  .footer-bottom { flex-direction:column; text-align:center; }
  .section { padding:48px 0; }
  .section-dark { padding:48px 0; }
}
@media (max-width:480px) {
  .hero-stats { gap:20px; }
  .hero-actions { flex-direction:column; }
  .video-grid { grid-template-columns:1fr; }
}