:root {
  /* ========================================================
     01「雾松灰绿 × 赛道红」高端汽车品牌专属配色系统
     ======================================================== */
  --bg-main: #202925;          /* 页面主背景 */
  --bg-section-alt: #29372F;   /* 区块背景 (深浅交替) */
  --bg-card: #33453B;          /* 卡片背景 (深松绿实体) */
  --bg-card-hover: #405448;    /* 卡片悬停 */
  --color-secondary: #596D60;  /* 辅助色 */
  --icon-accent: #B8CBB9;      /* 图标强调 / 亮银绿 */
  --text-main: #FFFFFF;        /* 主标题 / 纯净高亮白 */
  --text-body: #D5DDD2;        /* 正文 / 清晰明亮浅灰绿 */
  --text-muted: #9DB0A1;       /* 次要文本 */
  --track-red: #F4F2E9;        /* 按钮与装饰点缀 (更新为明亮象牙白/雾白) */
  --track-red-hover: #FFFFFF;  /* 悬停纯白高亮 */
  
  --border-card: rgba(89, 109, 96, 0.40);       /* 辅助深边框 */
  --border-light: rgba(167, 184, 168, 0.26);    /* 极细浅灰绿边框 */
  --border-hover: rgba(167, 184, 168, 0.50);    /* 悬停高光细边 */

  --gradient-cta: linear-gradient(135deg, #7E978C 0%, #DDE5E0 100%);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 4px 12px rgba(18, 24, 21, 0.25);
  --shadow-md: 0 12px 32px -4px rgba(18, 24, 21, 0.38);
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-body);
  line-height: 1.65;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-color: var(--bg-main);
}

/* 键盘无障碍跳跃链接 */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background: var(--icon-accent);
  color: #202925;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 15px;
  outline: 3px solid var(--text-main);
}

:focus-visible {
  outline: 2px solid var(--icon-accent);
  outline-offset: 3px;
}

a {
  color: var(--icon-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--text-main);
  text-decoration: underline;
}

/* 容器规范 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 页眉与导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(32, 41, 37, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-card);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-main);
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand-logo:hover {
  text-decoration: none;
  color: #ffffff;
}

.brand-icon,
.brand-logo-img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: contain;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}
.brand-logo:hover .brand-logo-img {
  transform: scale(1.08);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 22px;
  align-items: center;
}

.nav-link {
  color: var(--text-body);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 8px 4px;
  display: inline-block;
  min-height: 44px;
  line-height: 28px;
}
.nav-link:hover, .nav-link:focus {
  color: var(--text-main);
  text-decoration: none;
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-cta);
  color: #1F2623;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  min-height: 44px;
  min-width: 44px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, filter 0.2s ease;
  text-decoration: none;
}
.nav-cta-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
  text-decoration: none;
  color: #161D19;
}

/* 主视觉区 Hero (完全去除渲染颜色/色调遮罩，呈现纯正原版超跑，标题与文字纯白高亮) */
.hero-section {
  position: relative;
  padding: 95px 0 85px;
  text-align: center;
  background-color: #1a221e;
  background-image: url('assets/hero-lamborghini.jpg');
  background-repeat: no-repeat;
  background-position: center 38%;
  background-size: cover;
  overflow: hidden;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 20px;
  background: rgba(18, 24, 21, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.40);
  border-radius: 9999px;
  color: #ffffff;
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.6);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--track-red);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(244, 242, 233, 0.85);
}

.hero-title {
  font-size: clamp(2.2rem, 4.8vw, 3.5rem);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.95), 0 4px 25px rgba(0, 0, 0, 0.95), 0 0 40px rgba(0, 0, 0, 0.85);
}

.hero-title .gradient-text {
  color: #ffffff;
  background: none;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: #ffffff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.95), 0 4px 25px rgba(0, 0, 0, 0.95), 0 0 40px rgba(0, 0, 0, 0.85);
  display: inline;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: #f1f5f3;
  max-width: 820px;
  margin: 0 auto 36px;
  line-height: 1.75;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.95), 0 4px 18px rgba(0, 0, 0, 0.9);
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-primary-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: var(--gradient-cta);
  color: #1F2623;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 14px 34px;
  border-radius: var(--radius-md);
  min-height: 48px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  text-decoration: none;
}
.btn-primary-lg:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 14px 28px -4px rgba(18, 24, 21, 0.5);
  text-decoration: none;
  color: #161D19;
}

.btn-secondary-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-section-alt);
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  min-height: 48px;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  text-decoration: none;
}
.btn-secondary-lg:hover {
  border-color: var(--icon-accent);
  background: var(--bg-card);
  text-decoration: none;
  color: #ffffff;
}

/* 数据指标卡片 (半透明深松绿毛玻璃，数字浅雾绿) */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 20px;
  background: rgba(41, 55, 47, 0.85);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

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

.stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 区块公用样式与深浅交替层级 */
.section-block {
  padding: 80px 0;
  scroll-margin-top: calc(var(--header-height) + 16px);
  background-color: var(--bg-main); /* 页面主背景 #202925 */
}

.section-block-alt {
  padding: 80px 0;
  scroll-margin-top: calc(var(--header-height) + 16px);
  background-color: var(--bg-section-alt); /* 区块背景 #29372F */
  border-top: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--icon-accent);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.7;
}

/* ========================================================
   三张核心优势卡片：重点重做视觉
   深松绿实体卡片 + 极细浅灰绿边框 + 柔和阴影 + 适当留白
   ======================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card); /* #33453B 深松绿实体 */
  border: 1px solid var(--border-light); /* 极细浅灰绿边框 */
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 28px rgba(18, 24, 21, 0.35); /* 柔和阴影 */
  transition: transform 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  background-color: var(--bg-card-hover); /* #405448 */
  border-color: var(--border-hover);
  box-shadow: 0 16px 36px rgba(18, 24, 21, 0.45);
}

/* 图标统一样式：半透明鼠尾草绿背景 + 银绿色图标 */
.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  background: rgba(167, 184, 168, 0.12); /* 半透明鼠尾草绿背景 */
  border: 1px solid rgba(167, 184, 168, 0.24);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--icon-accent); /* 银绿色图标 */
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
  line-height: 1.4;
}

.feature-card p {
  color: var(--text-body);
  font-size: 0.96rem;
  line-height: 1.7;
  flex-grow: 1;
}

.feature-highlight-list {
  list-style: none;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(89, 109, 96, 0.3);
}

.feature-highlight-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-body);
  margin-bottom: 8px;
}
.feature-highlight-list li::before {
  content: "✓";
  color: var(--track-red); /* 赛道红精致点缀 */
  font-weight: bold;
}

/* ========================================================
   流媒体与 AI 支持图卡
   ======================================================== */
.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.media-ai-card {
  background: var(--bg-card); /* #33453B */
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(18, 24, 21, 0.3);
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.media-ai-card:hover {
  transform: translateY(-3px);
  background-color: var(--bg-card-hover);
}

/* 顶部赛道红精致细线点缀，摒弃大面积发光 */
.media-ai-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--track-red);
}

.media-ai-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 12px;
}
.media-ai-card h3 svg {
  color: var(--icon-accent);
}

.media-ai-card p {
  color: var(--text-body);
  font-size: 0.98rem;
  margin-bottom: 24px;
  line-height: 1.7;
}

.badges-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.service-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(41, 55, 47, 0.65);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}
.service-pill svg {
  width: 18px;
  height: 18px;
  fill: var(--icon-accent);
}

/* ========================================================
   套餐价格对比表
   ======================================================== */
.pricing-wrapper {
  background: var(--bg-card); /* #33453B */
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.pricing-table-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.pricing-table caption {
  padding: 16px 20px;
  font-size: 0.92rem;
  color: var(--text-muted);
  text-align: right;
  border-bottom: 1px solid rgba(89, 109, 96, 0.3);
}

.pricing-table th, 
.pricing-table td {
  padding: 18px 22px;
  border-bottom: 1px solid rgba(89, 109, 96, 0.25);
  font-size: 0.95rem;
}

.pricing-table thead th {
  background-color: #243129;
  font-weight: 700;
  color: var(--text-main);
  font-size: 1rem;
}

.pricing-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.pricing-table .highlight-col {
  background-color: rgba(64, 84, 72, 0.22);
}

.tier-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-main);
}

.tier-badge {
  display: inline-block;
  background: rgba(244, 242, 233, 0.15);
  color: #F4F2E9;
  border: 1px solid rgba(244, 242, 233, 0.45);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 6px;
  vertical-align: middle;
}

.price-val {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
}

.price-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: normal;
}

.table-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  background-color: #F4F2E9;
  color: #1F2623;
  font-weight: 800;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  min-height: 44px;
  min-width: 90px;
  box-shadow: 0 2px 8px rgba(18, 24, 21, 0.35);
  transition: background-color 0.2s ease, transform 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}
.table-cta-btn:hover {
  background-color: #FFFFFF;
  color: #141A17;
  transform: translateY(-1px);
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(18, 24, 21, 0.45);
}

/* ========================================================
   用户评价
   ======================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card); /* #33453B */
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 24px rgba(18, 24, 21, 0.25);
}

.review-stars {
  color: #D4AF37; /* 哑光克制金 */
  font-size: 1.1rem;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.7;
  flex-grow: 1;
  margin-bottom: 20px;
  font-style: italic;
}

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid rgba(89, 109, 96, 0.3);
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card-hover);
  border: 1px solid var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--text-main);
  font-size: 1rem;
}

.reviewer-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.reviewer-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ========================================================
   FAQ 默认展开规范
   ======================================================== */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card); /* #33453B */
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0;
  overflow: hidden;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.faq-item:hover, .faq-item[open] {
  border-color: var(--border-hover);
}

.faq-summary {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  user-select: none;
  min-height: 48px;
}
.faq-summary::-webkit-details-marker {
  display: none;
}
.faq-summary::after {
  content: "▾";
  font-size: 1.2rem;
  color: var(--icon-accent);
  transition: transform 0.2s ease;
}
.faq-item[open] .faq-summary::after {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-body);
  font-size: 0.96rem;
  line-height: 1.75;
  border-top: 1px solid rgba(89, 109, 96, 0.25);
}

.faq-answer p {
  margin-top: 14px;
}

.faq-answer a {
  color: var(--icon-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.faq-answer a:hover {
  color: var(--text-main);
}

/* ========================================================
   页脚规范：深浅交替深沉收尾
   ======================================================== */
.site-footer {
  margin-top: auto;
  background-color: #171F1B; /* 最深松绿底色 */
  border-top: 1px solid var(--border-card);
  padding: 44px 0 32px;
  text-align: center;
}

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

.footer-link {
  color: var(--text-body);
  font-size: 0.98rem;
  font-weight: 600;
  padding: 10px 14px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease;
}
.footer-link:hover, .footer-link:focus {
  color: var(--text-main);
  text-decoration: none;
}

.footer-divider {
  color: rgba(89, 109, 96, 0.4);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ========================================================
   知识科普与文章页面规范
   ======================================================== */
.article-header {
  padding: 50px 0 30px;
  text-align: left;
}
.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.breadcrumb span {
  color: rgba(89, 109, 96, 0.6);
}
.article-meta {
  display: flex;
  gap: 18px;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 12px;
  flex-wrap: wrap;
}
.article-content {
  background: var(--bg-section-alt); /* #29372F */
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}
.article-content h2 {
  font-size: 1.5rem;
  color: var(--text-main);
  margin: 32px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(89, 109, 96, 0.35);
}
.article-content h3 {
  font-size: 1.25rem;
  color: var(--icon-accent);
  margin: 24px 0 12px;
}
.article-content p {
  color: var(--text-body);
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 18px;
}
.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
  color: var(--text-body);
}
.article-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}
.article-content .cta-box {
  background: rgba(51, 69, 59, 0.6);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 30px 0;
  text-align: center;
}
.article-content .cta-box p {
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 16px;
}

/* 知识科普目录列表 */
.article-archive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.archive-card {
  background: var(--bg-card); /* #33453B */
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  box-shadow: 0 6px 18px rgba(18, 24, 21, 0.2);
}
.archive-card:hover {
  transform: translateY(-3px);
  background-color: var(--bg-card-hover);
  border-color: var(--border-hover);
}
.archive-card h2 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}
.archive-card h2 a {
  color: var(--text-main);
  text-decoration: none;
}
.archive-card h2 a:hover {
  color: var(--icon-accent);
}
.archive-card p {
  font-size: 0.9rem;
  color: var(--text-body);
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 16px;
}
.archive-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

/* ========================================================
   响应式媒体查询：360px, 390px, 768px, 1440px
   ======================================================== */
@media (max-width: 992px) {
  .feature-grid,
  .reviews-grid,
  .article-archive-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .media-ai-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }
  .site-header {
    height: auto;
    padding: 6px 0;
  }
  .site-header .container {
    flex-wrap: wrap;
    padding: 6px 16px;
  }
  .main-nav {
    width: 100%;
    order: 3;
    overflow-x: auto;
    padding: 6px 0 2px;
    gap: 12px;
    justify-content: flex-start;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .main-nav::-webkit-scrollbar {
    display: none;
  }
  .nav-list {
    gap: 14px;
  }
  .nav-link {
    font-size: 0.88rem;
    white-space: nowrap;
    min-height: 38px;
    line-height: 24px;
  }
  .nav-cta-btn {
    padding: 6px 14px;
    font-size: 0.85rem;
    min-height: 38px;
  }

  .badge-tag {
    white-space: normal;
    text-align: center;
    font-size: 0.82rem;
    padding: 6px 14px;
    max-width: 95%;
  }

  .hero-section {
    padding: 45px 0 35px;
  }
  .hero-title {
    font-size: clamp(1.4rem, 6.2vw, 1.75rem);
    line-height: 1.3;
    word-break: break-word;
    padding: 0 4px;
  }
  .hero-subtitle {
    font-size: 0.95rem;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .btn-primary-lg,
  .btn-secondary-lg {
    width: 100%;
    max-width: 340px;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding: 16px;
  }
  .stat-num {
    font-size: 1.35rem;
  }

  .feature-grid,
  .reviews-grid,
  .article-archive-grid {
    grid-template-columns: 1fr;
  }
  .section-block,
  .section-block-alt {
    padding: 50px 0;
  }
  .article-content {
    padding: 24px 18px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 8px;
  }
  .footer-divider {
    display: none;
  }
}

@media (max-width: 390px) {
  .hero-title {
    font-size: 1.45rem;
    line-height: 1.35;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .stat-item {
    padding: 8px 0;
    border-bottom: 1px solid rgba(89, 109, 96, 0.25);
  }
  .stat-item:last-child {
    border-bottom: none;
  }
  .container {
    padding: 0 16px;
  }
}

@media (max-width: 360px) {
  .brand-logo {
    font-size: 1.1rem;
  }
  .hero-title {
    font-size: 1.32rem;
    line-height: 1.35;
  }
  .faq-summary {
    font-size: 0.95rem;
    padding: 16px 16px;
  }
}

/* 动效友好原则 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}