/* 国产视频植物视频社区 - 主样式文件 vnblrp.cn */
:root {
  --primary: #2d7a3a;
  --primary-dark: #1a5226;
  --primary-light: #4caf50;
  --accent: #f9a825;
  --accent-dark: #c17900;
  --text-dark: #1a1a1a;
  --text-gray: #555;
  --text-light: #888;
  --bg-light: #f5f9f5;
  --bg-white: #fff;
  --border: #e0ede0;
  --shadow: 0 4px 24px rgba(45,122,58,0.10);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: 0.25s ease;
}

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

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

body {
  font-family: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(8px);
  border-bottom: 2px solid var(--primary-light);
  box-shadow: 0 2px 16px rgba(45,122,58,0.08);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

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

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -1px;
  box-shadow: 0 2px 8px rgba(45,122,58,0.3);
}

.logo-img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(45,122,58,0.3);
  flex-shrink: 0;
}

.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: 1px;
}

.logo-text span { color: var(--accent); }

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

.main-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--primary);
  color: #fff;
}

/* SEARCH BAR */
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-light);
  border: 1.5px solid var(--border);
  border-radius: 24px;
  padding: 6px 14px;
  gap: 8px;
  min-width: 200px;
  max-width: 280px;
  flex: 1;
}

.header-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  color: var(--text-dark);
  width: 100%;
}

.header-search button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--primary);
  font-size: 16px;
  padding: 0;
  display: flex;
  align-items: center;
}

/* SEARCH DROPDOWN */
.search-wrap { position: relative; }

.search-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  z-index: 200;
  padding: 8px 0;
}

.search-dropdown.show { display: block; }

.search-dropdown li {
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text-gray);
  cursor: pointer;
}

.search-dropdown li:hover { background: var(--bg-light); color: var(--primary); }

/* MOBILE MENU */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.breadcrumb-inner a { color: var(--primary); }
.breadcrumb-inner .sep { color: var(--text-light); }
.breadcrumb-inner .current { color: var(--text-dark); font-weight: 600; }

/* ===== BANNER ===== */
.hero-banner {
  position: relative;
  height: 580px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-banner .banner-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-banner .banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,82,38,0.72) 0%, rgba(45,122,58,0.45) 60%, rgba(0,0,0,0.2) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  max-width: 800px;
  padding: 0 24px;
}

.hero-content h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.hero-content h1 .brand { color: var(--accent); }

.hero-content p {
  font-size: clamp(15px, 2vw, 20px);
  opacity: 0.92;
  margin-bottom: 32px;
  text-shadow: 0 1px 6px rgba(0,0,0,0.2);
}

.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 32px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-dark);
  box-shadow: 0 4px 16px rgba(249,168,37,0.4);
}

.btn-primary:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(249,168,37,0.5);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.7);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
  color: #fff;
}

.btn-green {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(45,122,58,0.3);
}

.btn-green:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ===== SECTION ===== */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-light); }
.section-dark { background: var(--primary-dark); color: #fff; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  background: rgba(45,122,58,0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.section-dark .section-tag {
  background: rgba(255,255,255,0.15);
  color: var(--accent);
}

.section-title {
  font-size: clamp(24px, 3.5vw, 40px);
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-dark .section-title { color: #fff; }

.section-sub {
  font-size: 16px;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto;
}

.section-dark .section-sub { color: rgba(255,255,255,0.75); }

/* ===== GRID ===== */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* ===== VIDEO CARD ===== */
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(45,122,58,0.18);
}

.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #1a1a1a;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  background: rgba(0,0,0,0.35);
}

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

.play-btn svg {
  width: 60px;
  height: 60px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4));
}

.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--accent);
  color: var(--text-dark);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
}

.video-info { padding: 14px 16px 16px; }

.video-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-light);
  flex-wrap: wrap;
}

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

.video-stats {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-light);
}

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

/* ===== CARD ===== */
.card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(45,122,58,0.15);
}

.card-img { aspect-ratio: 16/9; overflow: hidden; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.card:hover .card-img img { transform: scale(1.05); }

.card-body { padding: 20px; }
.card-tag {
  display: inline-block;
  background: rgba(45,122,58,0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.card-desc {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.6;
}

/* ===== EXPERT CARD ===== */
.expert-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition);
}

.expert-card:hover { transform: translateY(-6px); }

.expert-avatar {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
}

.expert-info { padding: 20px; }
.expert-name { font-size: 18px; font-weight: 800; color: var(--text-dark); margin-bottom: 4px; }
.expert-role { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: 13px; color: var(--text-gray); line-height: 1.6; margin-bottom: 14px; }

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

.award-tag {
  background: rgba(249,168,37,0.12);
  color: var(--accent-dark);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(249,168,37,0.3);
}

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

.btn-sm {
  padding: 7px 16px;
  font-size: 13px;
  border-radius: 20px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.btn-sm-green { background: var(--primary); color: #fff; }
.btn-sm-green:hover { background: var(--primary-dark); color: #fff; }
.btn-sm-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-sm-outline:hover { background: var(--primary); color: #fff; }

/* ===== REVIEW CARD ===== */
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary-light);
}

.review-stars { color: var(--accent); font-size: 18px; margin-bottom: 10px; }
.review-text { font-size: 15px; color: var(--text-gray); line-height: 1.7; margin-bottom: 16px; font-style: italic; }
.review-user { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
}

.review-name { font-weight: 700; font-size: 14px; color: var(--text-dark); }
.review-date { font-size: 12px; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #fff;
  transition: background var(--transition);
  user-select: none;
}

.faq-question:hover { background: var(--bg-light); }
.faq-question.open { color: var(--primary); background: rgba(45,122,58,0.04); }

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

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

.faq-answer {
  display: none;
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.7;
  border-top: 1px solid var(--border);
}

.faq-answer.open { display: block; }

/* ===== PARTNER LOGOS ===== */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: center;
}

.partner-logo {
  background: #fff;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-gray);
  transition: all var(--transition);
  min-width: 120px;
  text-align: center;
}

.partner-logo:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(45,122,58,0.12);
}

/* ===== STATS ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item { text-align: center; }
.stat-num {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label { font-size: 15px; color: rgba(255,255,255,0.8); }

/* ===== SHARE BUTTONS ===== */
.share-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #010101; color: #fff; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); }

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(45,122,58,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-label { font-size: 13px; color: var(--text-light); margin-bottom: 2px; }
.contact-value { font-size: 15px; font-weight: 600; color: var(--text-dark); }

/* QR CODES */
.qr-grid { display: flex; gap: 24px; flex-wrap: wrap; }

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

.qr-box {
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  margin-bottom: 8px;
}

.qr-label { font-size: 12px; color: var(--text-gray); font-weight: 600; }

/* ===== HOW TO JOIN ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-item { text-align: center; position: relative; }

.step-num {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(45,122,58,0.3);
}

.step-title { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.step-desc { font-size: 14px; color: var(--text-gray); line-height: 1.6; }

/* ===== AI SECTION ===== */
.ai-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-feature-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: background var(--transition);
}

.ai-feature-card:hover { background: rgba(255,255,255,0.12); }

.ai-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--accent) 0%, #ff8f00 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(249,168,37,0.3);
}

.ai-title { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.ai-desc { font-size: 14px; color: rgba(255,255,255,0.72); line-height: 1.6; }

/* ===== FOOTER ===== */
.site-footer {
  background: #0d2b12;
  color: rgba(255,255,255,0.8);
  padding: 60px 0 0;
}

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

.footer-brand .logo-text { color: #fff; font-size: 24px; }
.footer-brand .logo-text span { color: var(--accent); }
.footer-desc { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.7; margin: 12px 0 20px; }

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
}

.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }

.footer-social { display: flex; gap: 10px; margin-top: 16px; }

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: rgba(255,255,255,0.7);
  transition: all var(--transition);
  text-decoration: none;
}

.social-btn:hover { background: var(--primary); color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}

.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== PAGE HERO (inner pages) ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 60px 0;
  text-align: center;
  color: #fff;
}

.page-hero h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 900; margin-bottom: 12px; }
.page-hero p { font-size: 16px; opacity: 0.85; max-width: 600px; margin: 0 auto; }

/* ===== TAGS ===== */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.tag {
  background: rgba(45,122,58,0.1);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid rgba(45,122,58,0.2);
}

/* ===== PAGINATION ===== */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 48px;
  flex-wrap: wrap;
}

.page-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  border: 1.5px solid var(--border);
  color: var(--text-gray);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.page-btn:hover, .page-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== NOTICE BAR ===== */
.notice-bar {
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  padding: 10px 0;
  font-size: 14px;
  overflow: hidden;
}

.notice-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.notice-label {
  background: rgba(255,255,255,0.2);
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 12px;
  white-space: nowrap;
}

.notice-scroll { overflow: hidden; flex: 1; }
.notice-text { white-space: nowrap; animation: scrollLeft 30s linear infinite; }
@keyframes scrollLeft { from { transform: translateX(100%); } to { transform: translateX(-100%); } }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-feature-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: #fff; border-bottom: 2px solid var(--border); padding: 12px 24px; gap: 4px; box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 16px; }
  .menu-toggle { display: flex; }
  .header-search { display: none; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .hero-banner { height: 420px; }
  .footer-grid { grid-template-columns: 1fr; }
  .ai-feature-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-banner { height: 340px; }
  .steps-grid { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
}

/* ===== LAZY LOAD ===== */
img[data-src] { opacity: 0; transition: opacity 0.4s; }
img.loaded { opacity: 1; }

/* ===== HIDDEN KEYWORD LAYER (SEO) ===== */
.seo-keywords {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ===== VIDEO MODAL ===== */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.video-modal.open { display: flex; }

.modal-inner {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 900px;
  width: 90%;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.2);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background var(--transition);
}

.modal-close:hover { background: rgba(255,255,255,0.35); }

.modal-video {
  width: 100%;
  aspect-ratio: 16/9;
  background: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 16px;
}