/* ===== 蘑菇视频汽车改装视频社区 - 主样式 ===== */
/* cjsonp.cn | 原创设计 */

:root {
  --kkt-navy: #0d1b3e;
  --kkt-navy-mid: #142550;
  --kkt-navy-light: #1e3a6e;
  --kkt-orange: #ff6b00;
  --kkt-orange-light: #ff8c2e;
  --kkt-gold: #f5a623;
  --kkt-white: #ffffff;
  --kkt-bg: #f5f7fa;
  --kkt-bg-alt: #eef1f7;
  --kkt-text: #1a2340;
  --kkt-text-muted: #6b7a99;
  --kkt-border: #dde3ef;
  --kkt-radius: 12px;
  --kkt-shadow: 0 4px 24px rgba(13,27,62,0.10);
  --kkt-shadow-lg: 0 8px 48px rgba(13,27,62,0.15);
  --kkt-transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== 干扰标签隐藏 ===== */
.kkt-noise {
  display: none !important;
  visibility: hidden !important;
  position: absolute !important;
  left: -9999px !important;
  top: -9999px !important;
  width: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
}

/* ===== 全局重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: var(--kkt-text);
  background: var(--kkt-white);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--kkt-transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, select, textarea { font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 顶部公告栏 ===== */
.kkt-topbar {
  background: var(--kkt-navy);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  padding: 8px 24px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.kkt-topbar a {
  color: var(--kkt-orange-light);
  font-weight: 600;
  text-decoration: underline;
}

/* ===== 头部导航 ===== */
.kkt-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,27,62,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 2px 20px rgba(0,0,0,0.25);
}
.kkt-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.kkt-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.kkt-logo img {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255,107,0,0.5);
}
.kkt-logo-text { display: flex; flex-direction: column; }
.kkt-logo-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.kkt-logo-slogan {
  font-size: 10px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.05em;
}
.kkt-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}
.kkt-nav a {
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  transition: var(--kkt-transition);
  white-space: nowrap;
}
.kkt-nav a:hover, .kkt-nav a.active {
  color: #fff;
  background: rgba(255,107,0,0.18);
}
.kkt-nav a.nav-cta {
  background: var(--kkt-orange);
  color: #fff;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
}
.kkt-nav a.nav-cta:hover {
  background: var(--kkt-orange-light);
}
.kkt-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  margin-left: auto;
}
.kkt-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--kkt-transition);
}

/* ===== 搜索栏 ===== */
.kkt-search-wrap {
  background: var(--kkt-navy-mid);
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.kkt-search-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.kkt-search-form {
  display: flex;
  max-width: 680px;
  margin: 0 auto;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 28px;
  overflow: hidden;
}
.kkt-search-form input {
  flex: 1;
  padding: 10px 20px;
  background: transparent;
  border: none;
  outline: none;
  color: #fff;
  font-size: 14px;
}
.kkt-search-form input::placeholder { color: rgba(255,255,255,0.4); }
.kkt-search-form button {
  padding: 10px 24px;
  background: var(--kkt-orange);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: 0 28px 28px 0;
  transition: var(--kkt-transition);
}
.kkt-search-form button:hover { background: var(--kkt-orange-light); }

/* ===== 面包屑 ===== */
.kkt-breadcrumb {
  background: var(--kkt-bg);
  border-bottom: 1px solid var(--kkt-border);
  padding: 10px 0;
  font-size: 13px;
  color: var(--kkt-text-muted);
}
.kkt-breadcrumb .container { display: flex; align-items: center; gap: 6px; }
.kkt-breadcrumb a { color: var(--kkt-orange); }
.kkt-breadcrumb a:hover { text-decoration: underline; }

/* ===== HERO 区域 ===== */
.kkt-hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--kkt-navy);
}
.kkt-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(255,107,0,0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 20% 80%, rgba(30,58,110,0.8) 0%, transparent 70%),
    linear-gradient(135deg, #0d1b3e 0%, #142550 50%, #1e3a6e 100%);
}
.kkt-hero-overlay {
  position: absolute;
  inset: 0;
  background: url('/assets/images/hero_banner.jpg') center/cover no-repeat;
  opacity: 0.15;
}
.kkt-hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
  width: 100%;
}
.kkt-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,107,0,0.15);
  border: 1px solid rgba(255,107,0,0.3);
  color: var(--kkt-orange-light);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.kkt-hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}
.kkt-hero-content h1 em {
  font-style: normal;
  color: var(--kkt-orange);
}
.kkt-hero-subtitle {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.kkt-hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.kkt-hero-stat .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--kkt-orange);
  line-height: 1;
}
.kkt-hero-stat .label {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  margin-top: 4px;
}
.kkt-hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--kkt-orange);
  color: #fff;
  padding: 13px 28px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 700;
  transition: var(--kkt-transition);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(255,107,0,0.35);
}
.btn-primary:hover {
  background: var(--kkt-orange-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,107,0,0.45);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  padding: 12px 28px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.3);
  transition: var(--kkt-transition);
  cursor: pointer;
}
.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-2px);
}
.btn-sm {
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--kkt-transition);
}
.btn-sm-primary {
  background: var(--kkt-orange);
  color: #fff;
  border: none;
}
.btn-sm-primary:hover { background: var(--kkt-orange-light); }
.btn-sm-outline {
  background: transparent;
  color: var(--kkt-navy);
  border: 1.5px solid var(--kkt-border);
}
.btn-sm-outline:hover { border-color: var(--kkt-orange); color: var(--kkt-orange); }

/* ===== 通用Section ===== */
.kkt-section { padding: 72px 0; }
.kkt-section-alt { background: var(--kkt-bg); }
.kkt-section-dark {
  background: var(--kkt-navy);
  color: #fff;
}
.kkt-section-header {
  text-align: center;
  margin-bottom: 48px;
}
.kkt-section-tag {
  display: inline-block;
  background: rgba(255,107,0,0.1);
  color: var(--kkt-orange);
  border: 1px solid rgba(255,107,0,0.2);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.kkt-section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--kkt-navy);
  margin-bottom: 12px;
  line-height: 1.25;
}
.kkt-section-dark .kkt-section-title { color: #fff; }
.kkt-section-desc {
  font-size: 1rem;
  color: var(--kkt-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}
.kkt-section-dark .kkt-section-desc { color: rgba(255,255,255,0.55); }

/* ===== 功能卡片 ===== */
.kkt-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.kkt-feature-card {
  background: #fff;
  border: 1px solid var(--kkt-border);
  border-radius: var(--kkt-radius);
  padding: 28px 24px;
  transition: var(--kkt-transition);
}
.kkt-feature-card:hover {
  border-color: var(--kkt-orange);
  box-shadow: var(--kkt-shadow);
  transform: translateY(-4px);
}
.kkt-feature-icon {
  font-size: 2rem;
  margin-bottom: 14px;
}
.kkt-feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--kkt-navy);
  margin-bottom: 8px;
}
.kkt-feature-desc {
  font-size: 14px;
  color: var(--kkt-text-muted);
  line-height: 1.65;
}

/* ===== 视频网格 ===== */
.kkt-video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.kkt-video-card {
  background: #fff;
  border: 1px solid var(--kkt-border);
  border-radius: var(--kkt-radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--kkt-transition);
}
.kkt-video-card:hover {
  box-shadow: var(--kkt-shadow-lg);
  transform: translateY(-6px);
  border-color: var(--kkt-orange);
}
.kkt-video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--kkt-navy);
}
.kkt-video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.kkt-video-card:hover .kkt-video-thumb img { transform: scale(1.06); }
.kkt-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13,27,62,0.35);
  opacity: 0;
  transition: var(--kkt-transition);
}
.kkt-video-card:hover .kkt-play-btn { opacity: 1; }
.kkt-play-icon {
  width: 52px;
  height: 52px;
  background: var(--kkt-orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(255,107,0,0.5);
  transition: transform 0.2s;
}
.kkt-play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 9px 0 9px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.kkt-video-card:hover .kkt-play-icon { transform: scale(1.1); }
.kkt-video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--kkt-orange);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
}
.kkt-video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 6px;
}
.kkt-video-info { padding: 16px; }
.kkt-video-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--kkt-navy);
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.kkt-video-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--kkt-text-muted);
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.kkt-video-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.kkt-tag {
  background: rgba(255,107,0,0.08);
  color: var(--kkt-orange);
  border: 1px solid rgba(255,107,0,0.15);
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}

/* ===== 社区卡片 ===== */
.kkt-community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.kkt-community-card {
  background: #fff;
  border: 1px solid var(--kkt-border);
  border-radius: var(--kkt-radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--kkt-transition);
}
.kkt-community-card:hover {
  border-color: var(--kkt-orange);
  box-shadow: var(--kkt-shadow);
  transform: translateY(-4px);
}
.kkt-community-card .icon { font-size: 2.2rem; margin-bottom: 12px; }
.kkt-community-card h4 { font-size: 1rem; font-weight: 700; color: var(--kkt-navy); margin-bottom: 8px; }
.kkt-community-card p { font-size: 13px; color: var(--kkt-text-muted); line-height: 1.6; }

/* ===== 专家卡片 ===== */
.kkt-experts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.kkt-expert-card {
  background: #fff;
  border: 1px solid var(--kkt-border);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  gap: 0;
  transition: var(--kkt-transition);
}
.kkt-expert-card:hover {
  box-shadow: var(--kkt-shadow-lg);
  border-color: var(--kkt-orange);
  transform: translateY(-4px);
}
.kkt-expert-img {
  width: 160px;
  flex-shrink: 0;
  overflow: hidden;
}
.kkt-expert-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.kkt-expert-info { padding: 20px; flex: 1; }
.kkt-expert-name { font-size: 1.1rem; font-weight: 800; color: var(--kkt-navy); margin-bottom: 4px; }
.kkt-expert-role { font-size: 12px; color: var(--kkt-orange); font-weight: 600; margin-bottom: 10px; }
.kkt-expert-desc { font-size: 13px; color: var(--kkt-text-muted); line-height: 1.65; margin-bottom: 12px; }
.kkt-expert-awards { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.kkt-award-badge {
  background: rgba(255,107,0,0.08);
  color: var(--kkt-orange);
  border: 1px solid rgba(255,107,0,0.15);
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
}
.kkt-expert-btns { display: flex; gap: 8px; }

/* ===== 合作品牌 ===== */
.kkt-partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.kkt-partner-item {
  background: #fff;
  border: 1px solid var(--kkt-border);
  border-radius: 10px;
  padding: 14px 10px;
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--kkt-navy);
  transition: var(--kkt-transition);
}
.kkt-partner-item:hover {
  border-color: var(--kkt-orange);
  color: var(--kkt-orange);
  box-shadow: var(--kkt-shadow);
}

/* ===== 步骤卡片 ===== */
.kkt-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.kkt-step-card {
  background: #fff;
  border: 1px solid var(--kkt-border);
  border-radius: var(--kkt-radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--kkt-transition);
}
.kkt-step-card:hover {
  border-color: var(--kkt-orange);
  box-shadow: var(--kkt-shadow);
  transform: translateY(-4px);
}
.kkt-step-num {
  width: 36px;
  height: 36px;
  background: var(--kkt-orange);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  margin: 0 auto 12px;
}
.kkt-step-icon { font-size: 2rem; margin-bottom: 10px; }
.kkt-step-title { font-size: 1rem; font-weight: 700; color: var(--kkt-navy); margin-bottom: 8px; }
.kkt-step-desc { font-size: 13px; color: var(--kkt-text-muted); line-height: 1.65; }

/* ===== 联系区域 ===== */
.kkt-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.kkt-contact-info h2, .kkt-contact-info h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--kkt-navy);
  margin-bottom: 20px;
}
.kkt-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--kkt-border);
}
.kkt-contact-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 2px; }
.kkt-contact-label { font-size: 12px; color: var(--kkt-text-muted); margin-bottom: 2px; }
.kkt-contact-value { font-size: 14px; font-weight: 600; color: var(--kkt-navy); }
.kkt-contact-value a { color: var(--kkt-orange); }

/* ===== QR码 ===== */
.kkt-qr-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}
.kkt-qr-item { text-align: center; }
.kkt-qr-item img {
  width: 100px;
  height: 100px;
  border-radius: 8px;
  border: 1px solid var(--kkt-border);
  object-fit: cover;
}
.kkt-qr-label { font-size: 12px; color: var(--kkt-text-muted); margin-top: 6px; }

/* ===== 评价卡片 ===== */
.kkt-reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.kkt-review-card {
  background: #fff;
  border: 1px solid var(--kkt-border);
  border-radius: var(--kkt-radius);
  padding: 24px;
  transition: var(--kkt-transition);
}
.kkt-review-card:hover {
  box-shadow: var(--kkt-shadow);
  border-color: var(--kkt-gold);
  transform: translateY(-3px);
}
.kkt-review-stars { color: var(--kkt-gold); font-size: 1rem; margin-bottom: 12px; letter-spacing: 2px; }
.kkt-review-text { font-size: 13px; color: var(--kkt-text-muted); line-height: 1.7; margin-bottom: 16px; font-style: italic; }
.kkt-reviewer { display: flex; align-items: center; gap: 12px; }
.kkt-reviewer-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--kkt-navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}
.kkt-reviewer-name { font-size: 14px; font-weight: 700; color: var(--kkt-navy); }
.kkt-reviewer-info { font-size: 12px; color: var(--kkt-text-muted); }

/* ===== FAQ ===== */
.kkt-faq-list { max-width: 800px; margin: 0 auto; }
.kkt-faq-item { border-bottom: 1px solid var(--kkt-border); }
.kkt-faq-q {
  padding: 18px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--kkt-navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: var(--kkt-transition);
}
.kkt-faq-q:hover { color: var(--kkt-orange); }
.kkt-faq-q.open { color: var(--kkt-orange); }
.kkt-faq-q .arrow { font-size: 12px; transition: transform 0.3s; flex-shrink: 0; }
.kkt-faq-q.open .arrow { transform: rotate(180deg); }
.kkt-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  font-size: 14px;
  color: var(--kkt-text-muted);
  line-height: 1.8;
}
.kkt-faq-a.open {
  max-height: 300px;
  padding-bottom: 18px;
}

/* ===== 标签云 ===== */
.kkt-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 28px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 28px;
}
.kkt-tag-cloud a {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.65);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 5px 14px;
  border-radius: 16px;
  font-size: 13px;
  transition: var(--kkt-transition);
}
.kkt-tag-cloud a:hover {
  background: rgba(255,107,0,0.15);
  color: var(--kkt-orange-light);
  border-color: rgba(255,107,0,0.3);
}

/* ===== 页脚 ===== */
.kkt-footer {
  background: var(--kkt-navy);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}
.kkt-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
}
.kkt-footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}
.kkt-share-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.kkt-share-btn {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px 14px;
  border-radius: 16px;
  font-size: 12px;
  cursor: pointer;
  transition: var(--kkt-transition);
}
.kkt-share-btn:hover {
  background: rgba(255,107,0,0.2);
  color: var(--kkt-orange-light);
  border-color: rgba(255,107,0,0.3);
}
.kkt-footer-col h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.kkt-footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.kkt-footer-col ul li a {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: var(--kkt-transition);
}
.kkt-footer-col ul li a:hover { color: var(--kkt-orange-light); }
.kkt-footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
.kkt-footer-bottom a { color: rgba(255,255,255,0.5); }
.kkt-footer-bottom a:hover { color: var(--kkt-orange-light); }

/* ===== 页面Hero（内页） ===== */
.kkt-page-hero {
  background: linear-gradient(135deg, var(--kkt-navy) 0%, var(--kkt-navy-light) 100%);
  padding: 56px 0 48px;
  text-align: center;
}
.kkt-page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.kkt-page-hero p {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 视频模态框 ===== */
.kkt-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.kkt-modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.kkt-modal-box {
  background: var(--kkt-navy-mid);
  border-radius: 20px;
  width: 90%;
  max-width: 640px;
  position: relative;
  border: 1px solid rgba(255,255,255,0.1);
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s;
}
.kkt-modal-overlay.open .kkt-modal-box { transform: scale(1); }
.kkt-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1;
  transition: var(--kkt-transition);
}
.kkt-modal-close:hover { background: var(--kkt-orange); }

/* ===== 返回顶部 ===== */
.kkt-back-top {
  position: fixed;
  bottom: 32px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--kkt-orange);
  color: #fff;
  border-radius: 50%;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(255,107,0,0.4);
  opacity: 0;
  pointer-events: none;
  transition: var(--kkt-transition);
  z-index: 999;
  cursor: pointer;
}
.kkt-back-top.show { opacity: 1; pointer-events: all; }
.kkt-back-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255,107,0,0.5); }

/* ===== 淡入动画 ===== */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 移动端适配 ===== */
@media (max-width: 1024px) {
  .kkt-features-grid { grid-template-columns: repeat(2, 1fr); }
  .kkt-video-grid { grid-template-columns: repeat(2, 1fr); }
  .kkt-experts-grid { grid-template-columns: 1fr; }
  .kkt-footer-grid { grid-template-columns: 1fr 1fr; }
  .kkt-partners-grid { grid-template-columns: repeat(4, 1fr); }
  .kkt-reviews-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .kkt-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--kkt-navy); flex-direction: column; padding: 16px; gap: 4px; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .kkt-nav.open { display: flex; }
  .kkt-nav a { padding: 12px 16px; border-radius: 8px; }
  .kkt-hamburger { display: flex; }
  .kkt-header-inner { position: relative; }
  .kkt-video-grid { grid-template-columns: 1fr; }
  .kkt-community-grid { grid-template-columns: repeat(2, 1fr); }
  .kkt-steps-grid { grid-template-columns: repeat(2, 1fr); }
  .kkt-contact-grid { grid-template-columns: 1fr; }
  .kkt-experts-grid { grid-template-columns: 1fr; }
  .kkt-expert-card { flex-direction: column; }
  .kkt-expert-img { width: 100%; height: 200px; }
  .kkt-footer-grid { grid-template-columns: 1fr; }
  .kkt-reviews-grid { grid-template-columns: 1fr; }
  .kkt-partners-grid { grid-template-columns: repeat(3, 1fr); }
  .kkt-hero-stats { gap: 20px; }
  .kkt-hero-content { padding: 48px 24px; }
  .kkt-section { padding: 48px 0; }
  .kkt-footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .kkt-features-grid { grid-template-columns: 1fr; }
  .kkt-community-grid { grid-template-columns: 1fr; }
  .kkt-steps-grid { grid-template-columns: 1fr; }
  .kkt-partners-grid { grid-template-columns: repeat(2, 1fr); }
  .kkt-hero-btns { flex-direction: column; }
  .kkt-hero-btns .btn-primary, .kkt-hero-btns .btn-outline { width: 100%; justify-content: center; }
}