/* ==========================================
   夏色四叶草 (Summer Clover) - 官方网站样式
   ========================================== */

/* === CSS 变量 === */
:root {
  --primary: #8d9288;
  --primary-light: #a3a89e;
  --primary-dark: #6f746b;
  --dark: #282d33;
  --accent2: #4a3e42;
  --accent3: #535240;

  --bg-body: #1c1f24;
  --bg-alt: #222830;
  --bg-card: #2b3038;
  --bg-card-hover: #323a42;

  --text-primary: #e6e3dc;
  --text-secondary: #b0ada6;
  --text-muted: #7a7770;

  --border: rgba(141, 146, 136, 0.12);
  --border-hover: rgba(141, 146, 136, 0.3);

  --shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);

  --radius: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --transition: 0.3s ease;

  --section-py: 80px;
  --container-max: 1200px;
}

/* === 重置与基础 === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }
ol { padding-left: 1.5rem; }

/* === 布局 === */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: var(--section-py) 0; }

/* === Section 标题 === */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.section-title i {
  color: var(--primary);
  margin-right: 10px;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 2px;
  margin: 12px auto 0;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 10px;
}

/* === 按钮 === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  font-family: inherit;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-lg { padding: 13px 30px; font-size: 1.02rem; border-radius: var(--radius-md); }
.btn-sm { padding: 7px 16px; font-size: 0.85rem; }

.btn-primary {
  background: var(--primary);
  color: var(--dark);
  font-weight: 700;
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(141, 146, 136, 0.3);
}

.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(141, 146, 136, 0.1);
  transform: translateY(-2px);
}

/* === 头部导航 === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(28, 31, 36, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(28, 31, 36, 0.98);
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 64px;
}

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

.logo-icon {
  width: 30px;
  height: 30px;
  border-radius: 6px;
}

.logo-text {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.nav { flex: 1; overflow: hidden; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  justify-content: center;
  flex-wrap: nowrap;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 9px;
  border-radius: var(--radius);
  font-size: 0.83rem;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link i { font-size: 0.78em; opacity: 0.8; }

.nav-link:hover,
.nav-link.active {
  color: var(--primary-light);
  background: rgba(141, 146, 136, 0.1);
}

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

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: var(--radius);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端导航 */
.nav.open {
  display: block;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(28, 31, 36, 0.98);
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
  z-index: 999;
  overflow: visible;
}

.nav.open .nav-list {
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.nav.open .nav-link {
  width: 100%;
  padding: 10px 14px;
  font-size: 0.95rem;
}

/* === 英雄区 === */
.hero {
  position: relative;
  padding: 0;
  min-height: 520px;
  display: flex;
  align-items: center;
  margin-top: 64px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(28, 31, 36, 0.9) 0%,
    rgba(40, 45, 51, 0.78) 40%,
    rgba(74, 62, 66, 0.68) 70%,
    rgba(83, 82, 64, 0.62) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 44px 0;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(141, 146, 136, 0.18);
  border: 1px solid rgba(141, 146, 136, 0.38);
  color: var(--primary-light);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  margin-bottom: 16px;
  backdrop-filter: blur(4px);
}

.hero-title { margin-bottom: 12px; }

.hero-title-cn {
  display: block;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  line-height: 1.2;
}

.hero-title-en {
  display: block;
  font-size: clamp(0.95rem, 2vw, 1.3rem);
  color: var(--primary-light);
  font-weight: 400;
  letter-spacing: 0.12em;
  margin-top: 5px;
}

.hero-desc {
  color: rgba(230, 227, 220, 0.85);
  font-size: 0.97rem;
  margin-bottom: 20px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 24px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(230, 227, 220, 0.88);
  padding: 4px 11px;
  border-radius: 20px;
  font-size: 0.8rem;
  backdrop-filter: blur(4px);
}

.hero-tag i { color: var(--primary-light); font-size: 0.73em; }

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.hero-features {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 7px;
  color: rgba(230, 227, 220, 0.75);
  font-size: 0.86rem;
}

.hero-feature i {
  color: var(--primary-light);
  font-size: 0.95rem;
}

/* === 新闻动态 === */
.section-news { background: var(--bg-body); }

.news-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr;
  gap: 18px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.news-card--featured {
  border-color: rgba(141, 146, 136, 0.22);
  background: linear-gradient(145deg, var(--bg-card), rgba(74, 62, 66, 0.28));
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.news-tag {
  font-size: 0.74rem;
  padding: 2px 10px;
  border-radius: 12px;
  background: rgba(141, 146, 136, 0.18);
  color: var(--primary-light);
  font-weight: 500;
}

.news-tag--new {
  background: rgba(141, 146, 136, 0.28);
  color: #c0c4bb;
}

.news-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-left: auto;
}

.news-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.5;
}

.news-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.72;
  flex: 1;
  margin-bottom: 16px;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  color: var(--primary-light);
  font-weight: 500;
  transition: var(--transition);
}

.news-link:hover { gap: 10px; color: var(--primary-light); }

/* === 媒体画廊 === */
.section-gallery { background: var(--bg-alt); }

.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 10px;
  height: 480px;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--border);
}

.gallery-item--main {
  grid-row: 1 / 3;
}

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

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(28, 31, 36, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  transition: var(--transition);
  color: #fff;
}

.gallery-overlay i { font-size: 1.8rem; }
.gallery-overlay span { font-size: 0.88rem; }

.gallery-item:hover img { transform: scale(1.05); }
.gallery-item:hover .gallery-overlay { opacity: 1; }

/* 灯箱 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
}

.lightbox.open { display: flex; }

.lightbox-inner {
  max-width: 90vw;
  max-height: 90vh;
  text-align: center;
  position: relative;
}

.lightbox-inner img {
  max-width: 100%;
  max-height: 84vh;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.lightbox-caption {
  color: rgba(255, 255, 255, 0.65);
  margin-top: 12px;
  font-size: 0.88rem;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: fixed;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
  cursor: pointer;
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox-close { top: 20px; right: 20px; }
.lightbox-prev { left: 20px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 20px; top: 50%; transform: translateY(-50%); }

/* === 用户评价 === */
.section-reviews { background: var(--bg-body); }

.reviews-summary {
  display: flex;
  align-items: center;
  gap: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px 30px;
  margin-bottom: 34px;
}

.reviews-score { text-align: center; flex-shrink: 0; }

.score-number {
  font-family: 'Noto Serif SC', serif;
  font-size: 3.4rem;
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 8px;
}

.score-stars { color: #d4a843; font-size: 1.1rem; margin-bottom: 6px; }
.score-count { font-size: 0.82rem; color: var(--text-muted); }

.reviews-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.review-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 15px;
  background: rgba(141, 146, 136, 0.1);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.review-tag i { color: var(--primary); font-size: 0.72em; }

/* 轮播 */
.carousel-wrapper { position: relative; }

.carousel { overflow: hidden; border-radius: var(--radius-md); }

.carousel-track {
  display: flex;
  gap: 16px;
  transition: transform 0.4s ease;
}

.review-card {
  flex: 0 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 13px;
}

.reviewer-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent2), var(--accent3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  font-weight: 700;
  color: #e0ddd6;
  flex-shrink: 0;
}

.reviewer-info strong {
  display: block;
  font-size: 0.93rem;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.review-stars { color: #d4a843; font-size: 0.78rem; }

.review-date {
  margin-left: auto;
  font-size: 0.76rem;
  color: var(--text-muted);
}

.review-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.72;
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 22px;
}

.carousel-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-hover);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 0.88rem;
}

.carousel-btn:hover {
  background: rgba(141, 146, 136, 0.1);
  color: var(--primary-light);
  border-color: var(--primary);
}

.carousel-dots { display: flex; gap: 8px; }

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-hover);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.carousel-dot.active {
  background: var(--primary);
  transform: scale(1.35);
}

/* === 版本历史 === */
.section-versions { background: var(--bg-alt); }

.versions-timeline {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.version-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  position: relative;
  transition: var(--transition);
}

.version-item:hover { border-color: var(--border-hover); }

.version-item--current {
  border-color: rgba(141, 146, 136, 0.28);
  background: linear-gradient(145deg, var(--bg-card), rgba(83, 82, 64, 0.14));
}

.version-badge {
  position: absolute;
  top: -11px;
  left: 22px;
  background: var(--primary);
  color: var(--dark);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 2px 12px;
  border-radius: 12px;
}

.version-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.version-info {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  flex-wrap: wrap;
}

.version-number {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-light);
}

.version-date,
.version-size,
.version-platform {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.83rem;
  color: var(--text-muted);
}

.version-changes {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 8px;
}

.version-changes li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.version-changes li i {
  margin-top: 4px;
  font-size: 0.78rem;
  flex-shrink: 0;
}

.version-changes .fa-plus-circle { color: var(--primary-light); }
.version-changes .fa-paint-brush { color: #a8c8e0; }
.version-changes .fa-wrench { color: #d4a843; }
.version-changes .fa-bolt { color: #8ecf8e; }
.version-changes .fa-globe { color: #a0c4e8; }

/* === 游戏攻略 === */
.section-guides { background: var(--bg-body); }

.guide-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 30px;
}

.filter-btn {
  padding: 7px 20px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.86rem;
  color: var(--text-secondary);
  background: transparent;
  transition: var(--transition);
  font-family: inherit;
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary-light);
}

.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--dark);
  font-weight: 600;
}

.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.guide-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.guide-card.hidden { display: none; }

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 13px;
}

.guide-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: rgba(141, 146, 136, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-light);
  font-size: 1.05rem;
  flex-shrink: 0;
}

.guide-category-tag {
  font-size: 0.76rem;
  color: var(--text-muted);
  background: var(--bg-alt);
  padding: 3px 10px;
  border-radius: 12px;
}

.guide-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 9px;
}

.guide-desc {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 15px;
}

.guide-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 13px;
  border-top: 1px solid var(--border);
}

.guide-stars {
  display: flex;
  align-items: center;
  gap: 7px;
}

.guide-label { font-size: 0.76rem; color: var(--text-muted); }
.stars-text { color: #d4a843; font-size: 0.83rem; letter-spacing: 1px; }

.guide-difficulty {
  font-size: 0.74rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
}

.difficulty-easy { background: rgba(142, 207, 142, 0.15); color: #8ecf8e; }
.difficulty-medium { background: rgba(212, 168, 67, 0.15); color: #d4a843; }
.difficulty-hard { background: rgba(200, 120, 120, 0.15); color: #e09090; }

/* === 章节介绍 === */
.section-chapters { background: var(--bg-alt); }

.chapters-tabs {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 28px;
}

.chapter-tab {
  padding: 9px 26px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  font-size: 0.93rem;
  color: var(--text-secondary);
  background: transparent;
  transition: var(--transition);
  font-family: inherit;
}

.chapter-tab:hover {
  border-color: var(--primary);
  color: var(--primary-light);
}

.chapter-tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--dark);
  font-weight: 600;
}

.chapters-content {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.chapters-content.hidden { display: none; }

.chapter-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  gap: 20px;
  transition: var(--transition);
  align-items: flex-start;
}

.chapter-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}

.chapter-card--character {
  background: linear-gradient(145deg, var(--bg-card), rgba(74, 62, 66, 0.18));
}

.chapter-card--hidden {
  background: linear-gradient(145deg, var(--bg-card), rgba(83, 82, 64, 0.14));
}

.chapter-number {
  flex-shrink: 0;
  width: 76px;
  text-align: center;
  font-family: 'Noto Serif SC', serif;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary-light);
  background: rgba(141, 146, 136, 0.1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 4px;
  line-height: 1.5;
}

.char-route {
  background: rgba(74, 62, 66, 0.28);
  border-color: rgba(141, 146, 136, 0.22);
}

.chapter-body { flex: 1; }

.chapter-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.hidden-badge {
  font-size: 0.7rem;
  font-family: 'Noto Sans SC', sans-serif;
  font-weight: 600;
  background: rgba(83, 82, 64, 0.4);
  color: var(--primary-light);
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid rgba(141, 146, 136, 0.28);
}

.chapter-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 14px;
}

.chapter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 10px;
}

.chapter-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.chapter-meta i { color: var(--primary); }

.chapter-importance {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.importance-stars { color: #d4a843; }

/* === 常见问题 === */
.section-faq { background: var(--bg-body); }

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.open { border-color: var(--border-hover); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 17px 20px;
  font-size: 0.93rem;
  color: var(--text-primary);
  font-family: inherit;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition);
}

.faq-question:hover { color: var(--primary-light); }
.faq-question span { display: flex; align-items: center; gap: 10px; }
.faq-question span i { color: var(--primary); font-size: 0.88em; }

.faq-icon {
  color: var(--text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--primary-light);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-item.open .faq-answer { max-height: 600px; }

.faq-answer p {
  padding: 0 20px 16px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-answer ul,
.faq-answer ol {
  padding: 0 20px 16px 40px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 2;
}

.faq-answer a {
  color: var(--primary-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* === 页脚 === */
.footer {
  background: var(--dark);
  border-top: 1px solid var(--border);
  padding: 54px 0 22px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 44px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: 'Noto Serif SC', serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.82;
}

.footer-col-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

.footer-links li { margin-bottom: 9px; }

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-links a i { font-size: 0.76em; }
.footer-links a:hover { color: var(--primary-light); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 18px;
  text-align: center;
}

.footer-legal {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.footer-legal a { color: var(--text-muted); transition: color var(--transition); }
.footer-legal a:hover { color: var(--primary-light); }
.footer-sep { opacity: 0.35; }

.footer-disclaimer {
  font-size: 0.76rem;
  color: var(--text-muted);
  opacity: 0.65;
}

/* === 返回顶部 === */
.back-to-top {
  position: fixed;
  bottom: 26px;
  right: 26px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 500;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-3px);
  background: var(--primary-light);
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .news-grid { grid-template-columns: 1fr 1fr; }
  .news-card--featured { grid-column: 1 / 3; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .nav { display: none; }
  .hamburger { display: flex; }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    height: auto;
  }
  .gallery-item { aspect-ratio: 16 / 10; }
  .gallery-item--main { grid-row: auto; }

  .reviews-summary {
    flex-direction: column;
    gap: 18px;
    text-align: center;
  }
  .reviews-tags { justify-content: center; }

  .version-header { flex-wrap: wrap; }
  .version-header .btn { width: 100%; justify-content: center; margin-top: 10px; }
}

@media (max-width: 640px) {
  :root { --section-py: 56px; }

  .news-grid { grid-template-columns: 1fr; }
  .news-card--featured { grid-column: auto; }

  .gallery-grid { grid-template-columns: 1fr; height: auto; }
  .gallery-item { aspect-ratio: 16 / 9; }

  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .chapter-card { flex-direction: column; gap: 12px; }
  .chapter-number { width: 100%; padding: 7px 14px; text-align: left; }

  .footer-grid { grid-template-columns: 1fr; gap: 26px; }

  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }

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