/* 红桃视频官网 - 主样式文件 */
/* ============================= */

/* CSS Reset & Base */
*, *::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", "Hiragino Sans GB",
    "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
  color: #333;
  background: #fff;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* CSS Variables */
:root {
  --red: #e8192c;
  --red-light: #ff4d5e;
  --red-dark: #c0121f;
  --pink: #ffeef0;
  --pink-mid: #ffd0d5;
  --gray: #f5f5f5;
  --gray-mid: #e0e0e0;
  --text: #333;
  --text-light: #666;
  --text-muted: #999;
  --white: #fff;
  --shadow: 0 4px 20px rgba(232,25,44,0.12);
  --shadow-hover: 0 8px 32px rgba(232,25,44,0.22);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-alt { background: var(--gray); }
.section-pink { background: var(--pink); }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  margin-bottom: 12px;
}
.section-title span { color: var(--red); }
.section-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 48px;
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--gray-mid);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--red);
  white-space: nowrap;
}
.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--red), var(--red-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.site-nav { display: flex; gap: 4px; }
.site-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text);
  transition: var(--transition);
  white-space: nowrap;
}
.site-nav a:hover, .site-nav a.active {
  background: var(--pink);
  color: var(--red);
}
.header-cta {
  background: linear-gradient(135deg, var(--red), var(--red-light));
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: 24px !important;
  font-weight: 600;
  transition: var(--transition);
}
.header-cta:hover {
  background: linear-gradient(135deg, var(--red-dark), var(--red)) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

/* Search Bar */
.search-bar-wrap {
  background: var(--pink);
  padding: 12px 0;
  border-bottom: 1px solid var(--pink-mid);
}
.search-bar-inner {
  display: flex;
  align-items: center;
  max-width: 640px;
  margin: 0 auto;
  background: #fff;
  border: 2px solid var(--pink-mid);
  border-radius: 32px;
  overflow: hidden;
  transition: var(--transition);
}
.search-bar-inner:focus-within {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(232,25,44,0.1);
}
.search-bar-inner input {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 20px;
  font-size: 0.95rem;
  background: transparent;
  color: var(--text);
}
.search-bar-inner button {
  background: linear-gradient(135deg, var(--red), var(--red-light));
  border: none;
  color: #fff;
  padding: 10px 24px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
}
.search-bar-inner button:hover { background: var(--red-dark); }

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

/* ===== HERO ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, #fff0f1 0%, #fff 50%, #fff5f0 100%);
  padding: 80px 0 60px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(232,25,44,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--pink);
  color: var(--red);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
}
.hero h1 .brand { color: var(--red); }
.hero-desc {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--red), var(--red-light));
  color: #fff;
  padding: 14px 32px;
  border-radius: 32px;
  font-size: 1rem;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--red);
  padding: 14px 32px;
  border-radius: 32px;
  font-size: 1rem;
  font-weight: 700;
  border: 2px solid var(--red);
  transition: var(--transition);
}
.btn-secondary:hover {
  background: var(--pink);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--gray-mid);
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--red);
  display: block;
}
.stat-label { font-size: 0.85rem; color: var(--text-muted); }
.hero-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}
.hero-image img { width: 100%; height: 360px; object-fit: cover; }

/* ===== VIDEO CARDS ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #f0f0f0;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
  opacity: 0;
}
.video-card:hover .video-play-btn { opacity: 1; background: rgba(0,0,0,0.35); }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: transform 0.3s ease;
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--red);
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-cat {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--red);
  color: #fff;
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 600;
}
.video-info { padding: 16px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ===== BRAND STORY ===== */
.brand-story-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.brand-story-img {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}
.brand-story-img img { width: 100%; height: 380px; object-fit: cover; }
.brand-story-content h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text);
}
.brand-story-content h2 span { color: var(--red); }
.brand-story-content p {
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.9;
}
.brand-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.brand-tag {
  background: var(--pink);
  color: var(--red);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 600;
}

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.feature-img { aspect-ratio: 4/3; overflow: hidden; }
.feature-img img { width: 100%; height: 100%; object-fit: cover; }
.feature-body { padding: 20px; }
.feature-icon {
  width: 44px;
  height: 44px;
  background: var(--pink);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 12px;
}
.feature-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.feature-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7; }

/* ===== REVIEWS ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: var(--transition);
  border-top: 3px solid var(--pink-mid);
}
.review-card:hover {
  border-top-color: var(--red);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar {
  width: 44px;
  height: 44px;
  background: var(--pink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.review-name { font-weight: 700; font-size: 0.95rem; color: var(--text); }
.review-stars { color: #ffc107; font-size: 0.85rem; }
.review-text { font-size: 0.88rem; color: var(--text-light); line-height: 1.7; margin-bottom: 12px; }
.review-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.review-tag {
  background: var(--gray);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 10px;
}
.review-date { font-size: 0.78rem; color: var(--text-muted); margin-top: 10px; }

/* ===== MEDIA ===== */
.media-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.media-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: var(--transition);
}
.media-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.media-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.media-desc { font-size: 0.88rem; color: var(--text-light); }
.media-badge {
  display: inline-block;
  background: var(--pink);
  color: var(--red);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 12px;
  margin-top: 10px;
  font-weight: 600;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  transition: var(--transition);
  user-select: none;
}
.faq-question:hover { color: var(--red); }
.faq-question.active { color: var(--red); }
.faq-arrow {
  width: 24px;
  height: 24px;
  background: var(--pink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--red);
  font-size: 0.85rem;
}
.faq-question.active .faq-arrow { transform: rotate(180deg); background: var(--red); color: #fff; }
.faq-answer {
  display: none;
  padding: 0 24px 18px;
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.8;
  border-top: 1px solid var(--gray);
}
.faq-answer.open { display: block; }

/* ===== DOWNLOAD ===== */
.download-section {
  background: linear-gradient(135deg, var(--red) 0%, var(--red-light) 100%);
  color: #fff;
  text-align: center;
  padding: 80px 0;
}
.download-section h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.download-section p { font-size: 1.05rem; opacity: 0.9; margin-bottom: 36px; }
.download-btns { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.15);
  border: 2px solid rgba(255,255,255,0.5);
  color: #fff;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.dl-btn:hover { background: rgba(255,255,255,0.25); transform: translateY(-2px); }
.dl-btn-icon { font-size: 1.6rem; }
.dl-btn-text { text-align: left; }
.dl-btn-sub { font-size: 0.75rem; opacity: 0.8; display: block; }

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.contact-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.contact-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.contact-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.contact-card p { font-size: 0.9rem; color: var(--text-light); }

/* ===== FOOTER ===== */
.site-footer {
  background: #1a1a2e;
  color: rgba(255,255,255,0.75);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 0.88rem; line-height: 1.8; }
.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
  transition: color 0.2s;
}
.footer-col ul li a:hover { color: var(--red-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
}
.footer-domain {
  color: var(--red-light);
  font-weight: 600;
}
.update-time { color: rgba(255,255,255,0.5); font-size: 0.82rem; }

/* ===== INNER PAGES ===== */
.page-hero {
  background: linear-gradient(135deg, #fff0f1 0%, #fff 100%);
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--pink-mid);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--red); }
.breadcrumb span { color: var(--text-muted); }
.page-hero h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
}
.page-hero h1 span { color: var(--red); }
.page-hero p { color: var(--text-light); font-size: 1rem; }

/* Content Page Layout */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  padding: 48px 0;
}
.content-main {}
.content-sidebar {}
.sidebar-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  margin-bottom: 20px;
}
.sidebar-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--pink);
}
.sidebar-links li { margin-bottom: 8px; }
.sidebar-links a {
  font-size: 0.88rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}
.sidebar-links a::before { content: '▶'; color: var(--red); font-size: 0.6rem; }
.sidebar-links a:hover { color: var(--red); }

/* Article Cards */
.article-list { display: flex; flex-direction: column; gap: 20px; }
.article-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  grid-template-columns: 200px 1fr;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: var(--transition);
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.article-img { overflow: hidden; }
.article-img img { width: 100%; height: 140px; object-fit: cover; }
.article-body { padding: 20px; }
.article-cat {
  display: inline-block;
  background: var(--pink);
  color: var(--red);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 10px;
  font-weight: 600;
  margin-bottom: 10px;
}
.article-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.article-body p { font-size: 0.88rem; color: var(--text-light); line-height: 1.7; }
.article-meta {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Changelog */
.changelog-list { display: flex; flex-direction: column; gap: 0; }
.changelog-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--gray);
}
.changelog-version {
  text-align: center;
  padding-top: 4px;
}
.version-num {
  display: inline-block;
  background: var(--red);
  color: #fff;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.version-date { font-size: 0.8rem; color: var(--text-muted); }
.changelog-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.changelog-body ul { padding-left: 0; }
.changelog-body ul li {
  font-size: 0.9rem;
  color: var(--text-light);
  padding: 4px 0 4px 20px;
  position: relative;
}
.changelog-body ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--red);
  font-weight: 700;
}

/* Download Cards */
.download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.dl-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
  text-align: center;
  transition: var(--transition);
}
.dl-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.dl-card-icon { font-size: 3rem; margin-bottom: 16px; }
.dl-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.dl-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 20px; }
.dl-card .btn-primary { justify-content: center; width: 100%; }

/* Tips Grid */
.tips-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tip-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: var(--transition);
}
.tip-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.tip-num {
  width: 36px;
  height: 36px;
  background: var(--red);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 14px;
}
.tip-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.tip-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.7; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .media-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .content-sidebar { display: none; }
}
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { display: none; }
  .hero h1 { font-size: 1.9rem; }
  .brand-story-inner { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .media-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  .tips-grid { grid-template-columns: 1fr; }
  .article-card { grid-template-columns: 1fr; }
  .article-img img { height: 200px; }
  .site-nav { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 12px; box-shadow: 0 8px 24px rgba(0,0,0,0.1); z-index: 999; }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .hero-stats { gap: 20px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
  .changelog-item { grid-template-columns: 1fr; gap: 12px; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .hero-stats { flex-wrap: wrap; }
  .footer-bottom { flex-direction: column; text-align: center; }
}