/* 抖阴官网 - 影院级视频流媒体品牌站 */

:root {

  --bg-deep: #06060b;

  --bg-panel: #0e0e16;

  --bg-card: #14141f;

  --bg-elevated: #1a1a28;

  --cyan: #00f2ea;

  --magenta: #ff0050;

  --red: #ff2d55;

  --red-dim: #c41e3a;

  --text: #f0f0f5;

  --text-muted: #8b8b9e;

  --text-dim: #5c5c6e;

  --border: rgba(255,255,255,0.06);

  --glow-cyan: rgba(0,242,234,0.25);

  --glow-magenta: rgba(255,0,80,0.2);

  --nav-h: 60px;

  --bar-h: 52px;

  --radius: 10px;

  --radius-lg: 16px;

  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --mono: "JetBrains Mono", "Consolas", monospace;

}



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

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

body {

  font-family: var(--font);

  background: var(--bg-deep);

  color: var(--text);

  line-height: 1.75;

  overflow-x: hidden;

  -webkit-font-smoothing: antialiased;

}

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

a:hover { color: var(--magenta); }

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

ul { list-style: none; }



/* 扫描线背景 */

body::before {

  content: "";

  position: fixed;

  inset: 0;

  background: repeating-linear-gradient(

    0deg,

    transparent,

    transparent 2px,

    rgba(0,0,0,0.03) 2px,

    rgba(0,0,0,0.03) 4px

  );

  pointer-events: none;

  z-index: 9999;

}



.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }



/* ===== 顶部导航 ===== */

.site-header {

  position: fixed;

  top: 0; left: 0; right: 0;

  z-index: 1000;

  height: var(--nav-h);

  background: rgba(6,6,11,0.92);

  backdrop-filter: blur(20px);

  border-bottom: 1px solid var(--border);

}

.header-inner {

  display: flex;

  align-items: center;

  justify-content: space-between;

  height: var(--nav-h);

  gap: 12px;

}

.logo-link {

  display: flex;

  align-items: center;

  gap: 10px;

  flex-shrink: 0;

}

.logo-link img { height: 36px; width: auto; }

.logo-text {

  font-size: 1.25rem;

  font-weight: 700;

  color: var(--text);

  letter-spacing: 0.02em;

}

.logo-text span {

  background: linear-gradient(90deg, var(--cyan), var(--magenta));

  -webkit-background-clip: text;

  -webkit-text-fill-color: transparent;

  background-clip: text;

}



.main-nav { display: none; }

.main-nav ul { display: flex; gap: 4px; }

.main-nav a {

  color: var(--text-muted);

  font-size: 0.9rem;

  padding: 8px 14px;

  border-radius: 6px;

  transition: all .2s;

}

.main-nav a:hover, .main-nav a.active {

  color: var(--text);

  background: rgba(255,255,255,0.05);

}



.nav-toggle {

  display: flex;

  flex-direction: column;

  gap: 5px;

  background: none;

  border: none;

  cursor: pointer;

  padding: 8px;

}

.nav-toggle span {

  display: block;

  width: 22px;

  height: 2px;

  background: var(--text);

  border-radius: 2px;

  transition: .3s;

}

.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }

.nav-toggle.open span:nth-child(2) { opacity: 0; }

.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }



.mobile-nav {

  display: none;

  position: fixed;

  top: var(--nav-h);

  left: 0; right: 0;

  background: var(--bg-panel);

  border-bottom: 1px solid var(--border);

  padding: 12px 16px 20px;

  z-index: 999;

}

.mobile-nav.open { display: block; }

.mobile-nav a {

  display: block;

  color: var(--text-muted);

  padding: 12px 8px;

  border-bottom: 1px solid var(--border);

  font-size: 0.95rem;

}

.mobile-nav a:hover { color: var(--cyan); }



/* ===== 固定下载广告条 ===== */

.download-bar {

  position: fixed;

  top: var(--nav-h);

  left: 0; right: 0;

  z-index: 998;

  height: var(--bar-h);

  background: linear-gradient(90deg, #12121e 0%, #1a1020 50%, #12121e 100%);

  border-bottom: 1px solid rgba(255,45,85,0.2);

  display: flex;

  align-items: center;

}

.download-bar-inner {

  display: flex;

  align-items: center;

  justify-content: space-between;

  width: 100%;

  gap: 12px;

}

.bar-app {

  display: flex;

  align-items: center;

  gap: 10px;

  min-width: 0;

}

.bar-app img {

  width: 36px;

  height: 36px;

  border-radius: 8px;

  flex-shrink: 0;

}

.bar-app-info { min-width: 0; }

.bar-app-name {

  font-size: 0.9rem;

  font-weight: 600;

  color: var(--text);

  white-space: nowrap;

  overflow: hidden;

  text-overflow: ellipsis;

}

.bar-app-desc {

  font-size: 0.72rem;

  color: var(--text-muted);

  white-space: nowrap;

  overflow: hidden;

  text-overflow: ellipsis;

}

.bar-actions { display: flex; gap: 8px; flex-shrink: 0; }

.btn-download-sm {

  display: inline-flex;

  align-items: center;

  gap: 4px;

  padding: 8px 16px;

  background: linear-gradient(135deg, var(--red), var(--magenta));

  color: #fff;

  font-size: 0.82rem;

  font-weight: 600;

  border-radius: 20px;

  border: none;

  cursor: pointer;

  white-space: nowrap;

  transition: transform .2s, box-shadow .2s;

}

.btn-download-sm:hover {

  transform: scale(1.03);

  box-shadow: 0 4px 20px var(--glow-magenta);

  color: #fff;

}

.bar-more {

  font-size: 0.75rem;

  color: var(--text-muted);

  padding: 8px 10px;

  border: 1px solid var(--border);

  border-radius: 20px;

  white-space: nowrap;

}

.bar-more:hover { color: var(--cyan); border-color: var(--cyan); }



/* 主内容偏移 */

.page-wrap {

  padding-top: calc(var(--nav-h) + var(--bar-h));

}



/* ===== Hero 影院区 ===== */

.hero {

  position: relative;

  padding: 32px 0 48px;

  overflow: hidden;

}

.hero::before {

  content: "";

  position: absolute;

  top: -50%; left: -20%;

  width: 140%; height: 200%;

  background: radial-gradient(ellipse at 30% 20%, var(--glow-cyan) 0%, transparent 50%),

              radial-gradient(ellipse at 70% 60%, var(--glow-magenta) 0%, transparent 40%);

  opacity: 0.4;

  pointer-events: none;

}

.hero-grid {

  display: grid;

  grid-template-columns: 1fr;

  gap: 28px;

  position: relative;

}

.hero-badge {

  display: inline-flex;

  align-items: center;

  gap: 6px;

  padding: 4px 12px;

  background: rgba(255,45,85,0.12);

  border: 1px solid rgba(255,45,85,0.3);

  border-radius: 20px;

  font-size: 0.78rem;

  color: var(--red);

  margin-bottom: 14px;

}

.hero-badge .rec-dot {

  width: 6px; height: 6px;

  background: var(--red);

  border-radius: 50%;

  animation: pulse 1.5s infinite;

}

@keyframes pulse {

  0%, 100% { opacity: 1; }

  50% { opacity: 0.3; }

}

.hero h1 {

  font-size: clamp(1.6rem, 5vw, 2.4rem);

  font-weight: 800;

  line-height: 1.3;

  margin-bottom: 14px;

}

.hero h1 em {

  font-style: normal;

  background: linear-gradient(90deg, var(--cyan), var(--magenta));

  -webkit-background-clip: text;

  -webkit-text-fill-color: transparent;

  background-clip: text;

}

.hero-lead {

  font-size: 0.95rem;

  color: var(--text-muted);

  margin-bottom: 24px;

  max-width: 540px;

}

.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }

.btn-primary {

  display: inline-flex;

  align-items: center;

  gap: 8px;

  padding: 14px 28px;

  background: linear-gradient(135deg, var(--red) 0%, var(--magenta) 100%);

  color: #fff;

  font-size: 1rem;

  font-weight: 700;

  border-radius: 28px;

  border: none;

  cursor: pointer;

  transition: all .25s;

  box-shadow: 0 8px 30px var(--glow-magenta);

}

.btn-primary:hover {

  transform: translateY(-2px);

  box-shadow: 0 12px 40px var(--glow-magenta);

  color: #fff;

}

.btn-outline {

  display: inline-flex;

  align-items: center;

  gap: 8px;

  padding: 14px 24px;

  background: transparent;

  color: var(--text);

  font-size: 0.95rem;

  border: 1px solid var(--border);

  border-radius: 28px;

  transition: all .2s;

}

.btn-outline:hover {

  border-color: var(--cyan);

  color: var(--cyan);

}

.hero-stats {

  display: flex;

  gap: 24px;

  flex-wrap: wrap;

}

.hero-stat strong {

  display: block;

  font-size: 1.3rem;

  font-weight: 800;

  color: var(--cyan);

  font-family: var(--mono);

}

.hero-stat span {

  font-size: 0.75rem;

  color: var(--text-dim);

}



/* 播放器模拟 */

.player-mock {

  position: relative;

  border-radius: var(--radius-lg);

  overflow: hidden;

  background: #000;

  aspect-ratio: 16/9;

  box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px var(--border);

}

.player-mock img {

  width: 100%;

  height: 100%;

  object-fit: cover;

}

.player-overlay {

  position: absolute;

  inset: 0;

  background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.85) 100%);

  display: flex;

  flex-direction: column;

  justify-content: flex-end;

  padding: 16px;

}

.player-top {

  position: absolute;

  top: 12px; left: 12px; right: 12px;

  display: flex;

  justify-content: space-between;

  align-items: center;

}

.live-tag {

  display: flex;

  align-items: center;

  gap: 5px;

  padding: 3px 10px;

  background: rgba(255,45,85,0.85);

  border-radius: 4px;

  font-size: 0.7rem;

  font-weight: 700;

  color: #fff;

}

.player-time {

  font-family: var(--mono);

  font-size: 0.75rem;

  color: rgba(255,255,255,0.7);

  background: rgba(0,0,0,0.5);

  padding: 3px 8px;

  border-radius: 4px;

}

.play-btn-center {

  position: absolute;

  top: 50%; left: 50%;

  transform: translate(-50%, -50%);

  width: 64px; height: 64px;

  background: rgba(255,45,85,0.9);

  border-radius: 50%;

  display: flex;

  align-items: center;

  justify-content: center;

  cursor: pointer;

  transition: transform .2s;

  box-shadow: 0 0 30px var(--glow-magenta);

}

.play-btn-center:hover { transform: translate(-50%, -50%) scale(1.08); }

.play-btn-center::after {

  content: "";

  border-style: solid;

  border-width: 10px 0 10px 18px;

  border-color: transparent transparent transparent #fff;

  margin-left: 4px;

}

.progress-bar {

  height: 3px;

  background: rgba(255,255,255,0.15);

  border-radius: 2px;

  margin-bottom: 8px;

  overflow: hidden;

}

.progress-fill {

  height: 100%;

  width: 35%;

  background: linear-gradient(90deg, var(--cyan), var(--magenta));

  border-radius: 2px;

}

.player-controls {

  display: flex;

  align-items: center;

  justify-content: space-between;

  font-size: 0.75rem;

  color: rgba(255,255,255,0.6);

}



/* ===== 频道标签轨 ===== */

.channel-rail {

  padding: 20px 0;

  border-bottom: 1px solid var(--border);

  overflow: hidden;

}

.channel-rail-inner {

  display: flex;

  gap: 8px;

  overflow-x: auto;

  padding-bottom: 4px;

  scrollbar-width: none;

}

.channel-rail-inner::-webkit-scrollbar { display: none; }

.chip {

  flex-shrink: 0;

  padding: 8px 18px;

  background: var(--bg-card);

  border: 1px solid var(--border);

  border-radius: 20px;

  font-size: 0.82rem;

  color: var(--text-muted);

  cursor: pointer;

  transition: all .2s;

  white-space: nowrap;

}

.chip:hover, .chip.active {

  background: var(--red);

  border-color: var(--red);

  color: #fff;

}



/* ===== 区块标题 ===== */

.section { padding: 48px 0; }

.section-header {

  display: flex;

  align-items: flex-end;

  justify-content: space-between;

  margin-bottom: 24px;

  gap: 12px;

}

.section-title {

  font-size: clamp(1.2rem, 3vw, 1.6rem);

  font-weight: 700;

}

.section-title::before {

  content: "▶ ";

  color: var(--red);

  font-size: 0.8em;

}

.section-sub {

  font-size: 0.85rem;

  color: var(--text-muted);

}

.section-link {

  font-size: 0.85rem;

  color: var(--cyan);

  white-space: nowrap;

}



/* ===== 视频网格 ===== */

.video-grid {

  display: grid;

  grid-template-columns: repeat(2, 1fr);

  gap: 14px;

}

.video-card {

  background: var(--bg-card);

  border-radius: var(--radius);

  overflow: hidden;

  border: 1px solid var(--border);

  transition: transform .25s, box-shadow .25s;

}

.video-card:hover {

  transform: translateY(-3px);

  box-shadow: 0 12px 30px rgba(0,0,0,0.4);

}

.video-thumb {

  position: relative;

  aspect-ratio: 16/10;

  overflow: hidden;

}

.video-thumb img {

  width: 100%;

  height: 100%;

  object-fit: cover;

  transition: transform .4s;

}

.video-card:hover .video-thumb img { transform: scale(1.05); }

.video-duration {

  position: absolute;

  bottom: 6px; right: 6px;

  padding: 2px 6px;

  background: rgba(0,0,0,0.8);

  border-radius: 4px;

  font-family: var(--mono);

  font-size: 0.68rem;

  color: #fff;

}

.video-views {

  position: absolute;

  bottom: 6px; left: 6px;

  padding: 2px 6px;

  background: rgba(0,0,0,0.8);

  border-radius: 4px;

  font-size: 0.68rem;

  color: rgba(255,255,255,0.8);

}

.video-new {

  position: absolute;

  top: 6px; left: 6px;

  padding: 2px 8px;

  background: var(--red);

  border-radius: 4px;

  font-size: 0.65rem;

  font-weight: 700;

  color: #fff;

}

.video-info { padding: 10px 12px; }

.video-title {

  font-size: 0.82rem;

  font-weight: 600;

  color: var(--text);

  display: -webkit-box;

  -webkit-line-clamp: 2;

  -webkit-box-orient: vertical;

  overflow: hidden;

  line-height: 1.4;

  margin-bottom: 6px;

}

.video-meta {

  font-size: 0.72rem;

  color: var(--text-dim);

}



/* ===== 功能展示 3:7 布局 ===== */

.feature-row {

  display: grid;

  grid-template-columns: 1fr;

  gap: 20px;

  margin-bottom: 36px;

  align-items: start;

}

.feature-img {

  border-radius: var(--radius-lg);

  overflow: hidden;

  border: 1px solid var(--border);

  box-shadow: 0 8px 30px rgba(0,0,0,0.3);

}

.feature-img img { width: 100%; }

.feature-caption {

  text-align: center;

  font-size: 0.78rem;

  color: var(--text-dim);

  padding: 8px;

  background: var(--bg-card);

}

.feature-text h3 {

  font-size: 1.15rem;

  margin-bottom: 10px;

  color: var(--text);

}

.feature-text p {

  font-size: 0.9rem;

  color: var(--text-muted);

  margin-bottom: 10px;

}

.feature-tags {

  display: flex;

  flex-wrap: wrap;

  gap: 6px;

  margin-top: 12px;

}

.tag {

  padding: 4px 10px;

  background: rgba(0,242,234,0.08);

  border: 1px solid rgba(0,242,234,0.2);

  border-radius: 4px;

  font-size: 0.72rem;

  color: var(--cyan);

}



/* ===== 功能亮点卡片 ===== */

.features-grid {

  display: grid;

  grid-template-columns: repeat(2, 1fr);

  gap: 14px;

}

.feat-card {

  background: var(--bg-card);

  border: 1px solid var(--border);

  border-radius: var(--radius);

  padding: 20px 16px;

  transition: border-color .2s;

}

.feat-card:hover { border-color: rgba(0,242,234,0.3); }

.feat-icon {

  width: 40px; height: 40px;

  background: linear-gradient(135deg, rgba(0,242,234,0.15), rgba(255,0,80,0.15));

  border-radius: 10px;

  display: flex;

  align-items: center;

  justify-content: center;

  font-size: 1.2rem;

  margin-bottom: 12px;

}

.feat-card h4 {

  font-size: 0.9rem;

  margin-bottom: 6px;

}

.feat-card p {

  font-size: 0.78rem;

  color: var(--text-muted);

  line-height: 1.5;

}



/* ===== APP 下载区 ===== */

.apps-section { background: var(--bg-panel); }

.apps-grid {

  display: grid;

  grid-template-columns: 1fr;

  gap: 16px;

}

.app-card {

  display: flex;

  align-items: center;

  gap: 16px;

  padding: 20px;

  background: var(--bg-card);

  border: 1px solid var(--border);

  border-radius: var(--radius-lg);

  transition: all .25s;

  position: relative;

  overflow: hidden;

}

.app-card.featured {

  border-color: rgba(255,45,85,0.4);

  background: linear-gradient(135deg, rgba(255,45,85,0.06) 0%, var(--bg-card) 60%);

}

.app-card.featured::before {

  content: "主推";

  position: absolute;

  top: 12px; right: -28px;

  background: var(--red);

  color: #fff;

  font-size: 0.65rem;

  font-weight: 700;

  padding: 2px 32px;

  transform: rotate(45deg);

}

.app-card.hot::after {

  content: "热门推荐";

  position: absolute;

  top: 10px; right: 12px;

  background: linear-gradient(90deg, #ff9500, #ff5e00);

  color: #fff;

  font-size: 0.65rem;

  font-weight: 700;

  padding: 3px 10px;

  border-radius: 10px;

}

.app-icon {

  width: 64px; height: 64px;

  border-radius: 14px;

  flex-shrink: 0;

  box-shadow: 0 4px 15px rgba(0,0,0,0.3);

}

.app-info { flex: 1; min-width: 0; }

.app-info h3 {

  font-size: 1.05rem;

  margin-bottom: 4px;

}

.app-info p {

  font-size: 0.8rem;

  color: var(--text-muted);

  margin-bottom: 8px;

}

.app-tags { display: flex; gap: 6px; flex-wrap: wrap; }

.app-tag {

  font-size: 0.68rem;

  padding: 2px 8px;

  background: rgba(255,255,255,0.05);

  border-radius: 4px;

  color: var(--text-dim);

}

.btn-app-dl {

  flex-shrink: 0;

  padding: 10px 20px;

  background: linear-gradient(135deg, var(--red), var(--magenta));

  color: #fff;

  font-size: 0.85rem;

  font-weight: 600;

  border-radius: 22px;

  border: none;

  cursor: pointer;

  transition: all .2s;

  white-space: nowrap;

}

.btn-app-dl:hover {

  box-shadow: 0 6px 20px var(--glow-magenta);

  color: #fff;

}

.app-card:not(.featured) .btn-app-dl {

  background: var(--bg-elevated);

  border: 1px solid var(--border);

}

.app-card:not(.featured) .btn-app-dl:hover {

  border-color: var(--cyan);

  color: var(--cyan);

  box-shadow: none;

}



/* ===== SEO 文章区 ===== */

.article-section {

  background: var(--bg-panel);

  border-top: 1px solid var(--border);

  border-bottom: 1px solid var(--border);

}

.article-wrap {

  max-width: 860px;

  margin: 0 auto;

}

.article-wrap h2 {

  font-size: 1.35rem;

  margin: 36px 0 14px;

  padding-left: 12px;

  border-left: 3px solid var(--red);

}

.article-wrap h3 {

  font-size: 1.1rem;

  margin: 24px 0 10px;

  color: var(--cyan);

}

.article-wrap p {

  font-size: 0.9rem;

  color: var(--text-muted);

  margin-bottom: 14px;

  text-align: justify;

}

.article-wrap ul, .article-wrap ol {

  margin: 10px 0 14px 20px;

  color: var(--text-muted);

  font-size: 0.9rem;

}

.article-wrap li { margin-bottom: 6px; list-style: disc; }

.article-wrap ol li { list-style: decimal; }

.article-img-block {

  display: grid;

  grid-template-columns: 1fr;

  gap: 16px;

  margin: 20px 0;

  align-items: start;

}

.article-img-block .art-img {

  border-radius: var(--radius);

  overflow: hidden;

  border: 1px solid var(--border);

}

.article-img-block .art-img img { width: 100%; }

.article-img-block .art-img figcaption {

  font-size: 0.75rem;

  color: var(--text-dim);

  text-align: center;

  padding: 6px;

  background: var(--bg-card);

}

.toc-box {

  background: var(--bg-card);

  border: 1px solid var(--border);

  border-radius: var(--radius);

  padding: 20px;

  margin-bottom: 28px;

}

.toc-box h4 {

  font-size: 0.95rem;

  margin-bottom: 12px;

  color: var(--text);

}

.toc-box ol {

  margin-left: 18px;

  font-size: 0.85rem;

}

.toc-box a { color: var(--text-muted); }

.toc-box a:hover { color: var(--cyan); }



/* ===== FAQ ===== */

.faq-list { max-width: 800px; }

.faq-item {

  border-bottom: 1px solid var(--border);

}

.faq-q {

  width: 100%;

  display: flex;

  justify-content: space-between;

  align-items: center;

  padding: 16px 0;

  background: none;

  border: none;

  color: var(--text);

  font-size: 0.92rem;

  font-weight: 600;

  cursor: pointer;

  text-align: left;

  font-family: var(--font);

}

.faq-q::after {

  content: "+";

  font-size: 1.2rem;

  color: var(--text-dim);

  transition: transform .2s;

  flex-shrink: 0;

  margin-left: 12px;

}

.faq-item.open .faq-q::after { transform: rotate(45deg); color: var(--red); }

.faq-a {

  max-height: 0;

  overflow: hidden;

  transition: max-height .3s ease;

}

.faq-a-inner {

  padding: 0 0 16px;

  font-size: 0.85rem;

  color: var(--text-muted);

  line-height: 1.7;

}



/* ===== 面包屑 ===== */

.breadcrumb {

  padding: 16px 0;

  font-size: 0.8rem;

  color: var(--text-dim);

}

.breadcrumb a { color: var(--text-muted); }

.breadcrumb span { margin: 0 6px; }



/* ===== 子页面 ===== */

.page-hero-sm {

  padding: 24px 0 32px;

  border-bottom: 1px solid var(--border);

}

.page-hero-sm h1 {

  font-size: clamp(1.4rem, 4vw, 1.8rem);

  margin-bottom: 8px;

}

.page-hero-sm p {

  font-size: 0.9rem;

  color: var(--text-muted);

}

.content-page {

  padding: 32px 0 60px;

}

.content-page .prose {

  max-width: 860px;

}

.content-page .prose h2 {

  font-size: 1.2rem;

  margin: 28px 0 12px;

  color: var(--text);

}

.content-page .prose h3 {

  font-size: 1.05rem;

  margin: 20px 0 8px;

  color: var(--cyan);

}

.content-page .prose p, .content-page .prose li {

  font-size: 0.9rem;

  color: var(--text-muted);

  margin-bottom: 12px;

  line-height: 1.8;

}

.content-page .prose ul, .content-page .prose ol {

  margin-left: 20px;

  margin-bottom: 14px;

}

.content-page .prose li { list-style: disc; }

.content-page .prose ol li { list-style: decimal; }



/* 下载页 */

.dl-steps {

  display: grid;

  gap: 16px;

  margin: 24px 0;

}

.dl-step {

  display: flex;

  gap: 16px;

  padding: 20px;

  background: var(--bg-card);

  border: 1px solid var(--border);

  border-radius: var(--radius);

}

.dl-step-num {

  width: 36px; height: 36px;

  background: linear-gradient(135deg, var(--cyan), var(--magenta));

  border-radius: 50%;

  display: flex;

  align-items: center;

  justify-content: center;

  font-weight: 800;

  font-size: 0.9rem;

  flex-shrink: 0;

  color: #fff;

}

.dl-step h4 { font-size: 0.95rem; margin-bottom: 4px; }

.dl-step p { font-size: 0.85rem; color: var(--text-muted); }



/* ===== 页脚 ===== */

.site-footer {

  background: var(--bg-panel);

  border-top: 1px solid var(--border);

  padding: 40px 0 24px;

}

.footer-grid {

  display: grid;

  grid-template-columns: 1fr;

  gap: 28px;

  margin-bottom: 32px;

}

.footer-brand img { height: 32px; margin-bottom: 10px; }

.footer-brand p {

  font-size: 0.82rem;

  color: var(--text-dim);

  max-width: 280px;

}

.footer-col h4 {

  font-size: 0.85rem;

  margin-bottom: 12px;

  color: var(--text);

}

.footer-col a {

  display: block;

  font-size: 0.82rem;

  color: var(--text-dim);

  padding: 4px 0;

}

.footer-col a:hover { color: var(--cyan); }

.footer-bottom {

  border-top: 1px solid var(--border);

  padding-top: 20px;

  display: flex;

  flex-direction: column;

  gap: 8px;

  font-size: 0.75rem;

  color: var(--text-dim);

  text-align: center;

}



/* ===== 错误页 ===== */

.error-page {

  min-height: 100vh;

  display: flex;

  align-items: center;

  justify-content: center;

  text-align: center;

  padding: 40px 16px;

}

.error-code {

  font-size: clamp(4rem, 15vw, 8rem);

  font-weight: 900;

  background: linear-gradient(180deg, var(--cyan), var(--magenta));

  -webkit-background-clip: text;

  -webkit-text-fill-color: transparent;

  background-clip: text;

  line-height: 1;

  margin-bottom: 12px;

}

.error-page h1 { font-size: 1.3rem; margin-bottom: 8px; }

.error-page p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 24px; }



/* ===== 响应式 ===== */

@media (min-width: 640px) {

  .video-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }

  .features-grid { grid-template-columns: repeat(3, 1fr); }

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

}



@media (min-width: 768px) {

  .main-nav { display: block; }

  .nav-toggle { display: none; }

  .hero-grid { grid-template-columns: 1fr 1.1fr; align-items: center; }

  .feature-row { grid-template-columns: 3fr 7fr; }

  .feature-row.reverse { grid-template-columns: 7fr 3fr; }

  .feature-row.reverse .feature-img { order: 2; }

  .feature-row.reverse .feature-text { order: 1; }

  .article-img-block { grid-template-columns: 3fr 7fr; }

  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }

  .video-grid { grid-template-columns: repeat(4, 1fr); }

}



@media (min-width: 1024px) {

  .hero { padding: 48px 0 64px; }

  .section { padding: 64px 0; }

}