:root {
  --primary: #64748b;
  --accent: #94a3b8;
  --bg: #f1f5f9;
  --text: #1e293b;
  --card-bg: #ffffff;
  --shadow-light: 0 2px 16px rgba(100, 116, 139, 0.08);
  --shadow-hover: 0 8px 30px rgba(100, 116, 139, 0.15);
  --radius-card: 16px;
  --radius-full: 999px;
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Noto Sans SC', sans-serif;
  line-height: 1.75;
  font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Noto Serif SC', serif;
  font-weight: 700;
}

.navbar {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(100, 116, 139, 0.08);
  padding: 0.8rem 0;
}

.navbar-brand {
  font-family: 'Noto Serif SC', serif;
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--text) !important;
  letter-spacing: 0.5px;
}

.navbar-brand i {
  color: var(--primary);
  margin-right: 8px;
}

.nav-link {
  font-weight: 500;
  color: var(--text) !important;
  margin: 0 0.5rem;
  transition: color 0.2s;
  position: relative;
}

.nav-link:hover { color: var(--primary) !important; }

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s;
}

.nav-link:hover::after { width: 60%; }

.navbar-toggler { border: none; }
.navbar-toggler:focus { box-shadow: none; }

.hero-section {
  padding: 6rem 1rem 4rem;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-section h1 {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--text);
}

.hero-section h1 .highlight {
  color: var(--primary);
  position: relative;
  white-space: nowrap;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: #475569;
  max-width: 600px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-hero {
  padding: 0.9rem 2.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 1.05rem;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-hero-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(100, 116, 139, 0.3);
}

.btn-hero-primary:hover {
  background: #556581;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(100, 116, 139, 0.4);
}

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

.btn-hero-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.section {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-tag {
  display: inline-block;
  background: rgba(100, 116, 139, 0.1);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.3rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.section-desc {
  color: #475569;
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 2.5rem;
}

/* 使用说明 - 手风琴 */
.accordion {
  --bs-accordion-border-color: rgba(100, 116, 139, 0.15);
  --bs-accordion-bg: var(--card-bg);
  --bs-accordion-active-bg: #f8fafc;
  --bs-accordion-active-color: var(--primary);
  --bs-accordion-btn-focus-box-shadow: none;
  --bs-accordion-btn-padding-y: 1.2rem;
  border-radius: var(--radius-card) !important;
  overflow: hidden;
  box-shadow: var(--shadow-light);
}

.accordion-item {
  border-left: none;
  border-right: none;
}

.accordion-item:first-child { border-top: none; }
.accordion-item:last-child { border-bottom: none; }

.accordion-button {
  font-weight: 600;
  color: var(--text);
  font-size: 1.05rem;
}

.accordion-button:not(.collapsed) {
  background: rgba(100, 116, 139, 0.05);
  color: var(--primary);
}

.accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2364748b'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.accordion-body {
  color: #475569;
  padding: 1.5rem 1.5rem 1.8rem;
  line-height: 1.8;
}

/* 特色网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-light);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border: 1px solid transparent;
  text-align: center;
}

.feature-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: rgba(100, 116, 139, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  color: var(--primary);
  font-size: 1.4rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
  font-weight: 600;
}

.feature-card p {
  color: #475569;
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 长文区块 */
.long-read {
  max-width: 720px;
}

.long-read p {
  margin-bottom: 1.5rem;
  color: #334155;
  font-size: 1.05rem;
}

.long-read .quote {
  border-left: 4px solid var(--primary);
  padding-left: 1.5rem;
  font-style: italic;
  color: var(--primary);
  font-size: 1.15rem;
  margin: 2rem 0;
  font-weight: 500;
}

/* FAQ */
.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 1.8rem;
  margin-bottom: 1.2rem;
  box-shadow: var(--shadow-light);
  transition: box-shadow 0.3s;
}

.faq-item:hover { box-shadow: var(--shadow-hover); }

.faq-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.faq-item h3 i {
  color: var(--primary);
  font-size: 0.9rem;
}

.faq-item p {
  color: #475569;
  margin-bottom: 0;
  line-height: 1.8;
  padding-left: 1.5rem;
}

/* CTA */
.cta-section {
  text-align: center;
  padding: 5rem 1.5rem;
  background: rgba(100, 116, 139, 0.03);
  border-top: 1px solid rgba(100, 116, 139, 0.08);
  border-bottom: 1px solid rgba(100, 116, 139, 0.08);
}

.cta-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.cta-section p {
  color: #475569;
  max-width: 500px;
  margin: 0 auto 2rem;
}

/* 友情链接 */
.friend-links {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 1.5rem 1rem;
  text-align: center;
}

.friend-links h3 {
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  font-weight: 500;
}

.friend-links .links-row {
  color: var(--accent);
  font-size: 0.95rem;
  word-break: break-all;
}

/* 页脚 */
.footer {
  background: #fff;
  border-top: 1px solid rgba(100, 116, 139, 0.08);
  padding: 3rem 1rem;
  text-align: center;
}

.footer-brand {
  font-family: 'Noto Serif SC', serif;
  font-weight: 900;
  font-size: 1.3rem;
  color: var(--text);
  margin-bottom: 1rem;
}

.footer-brand i { color: var(--primary); margin-right: 6px; }

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.footer-links a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--primary); }

.footer-copy {
  color: var(--accent);
  font-size: 0.85rem;
  margin-top: 1.5rem;
}

/* 回到顶部 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s ease;
  box-shadow: 0 4px 16px rgba(100, 116, 139, 0.3);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: #556581;
  transform: translateY(-3px);
}

/* 响应式 */
@media (max-width: 768px) {
  .hero-section h1 { font-size: 2.4rem; }
  .section-title { font-size: 1.7rem; }
  .hero-section { padding: 4rem 1rem 3rem; }
  .section { padding: 3rem 1rem; }
  .features-grid { grid-template-columns: 1fr; }
  .back-to-top { width: 42px; height: 42px; bottom: 20px; right: 20px; }
}

/* --- 子页面追加 --- */
/* 本页专属样式 - 关于我们页面 */
        .about-hero {
            background: linear-gradient(135deg, rgba(100,116,139,0.08) 0%, rgba(148,163,184,0.12) 100%);
            padding: 80px 0 60px;
            border-bottom: 1px solid rgba(100,116,139,0.15);
        }
.about-hero .page-title {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
.about-hero .page-subtitle {
            font-size: 1.15rem;
            color: var(--primary);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.8;
        }
.about-section {
            padding: 60px 0;
        }
.about-section:nth-child(even) {
            background: rgba(100,116,139,0.04);
        }
.about-section .section-inner {
            max-width: 860px;
            margin: 0 auto;
        }
.about-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 24px;
            position: relative;
            padding-bottom: 12px;
        }
.about-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
.about-section p {
            color: var(--text);
            line-height: 1.9;
            font-size: 1rem;
            margin-bottom: 16px;
        }
.about-section .highlight-box {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            margin: 24px 0;
            box-shadow: var(--shadow-light);
            border-left: 4px solid var(--primary);
        }
.about-section .highlight-box p {
            margin-bottom: 8px;
        }
.about-section .highlight-box p:last-child {
            margin-bottom: 0;
        }
.stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin: 40px 0;
        }
.stat-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-light);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
.stat-card .stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary);
            display: block;
            margin-bottom: 8px;
        }
.stat-card .stat-label {
            font-size: 0.95rem;
            color: var(--text);
            opacity: 0.8;
        }
.value-list {
            list-style: none;
            padding: 0;
            margin: 24px 0;
        }
.value-list li {
            padding: 14px 20px;
            background: var(--card-bg);
            border-radius: 12px;
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            box-shadow: var(--shadow-light);
            line-height: 1.6;
        }
.value-list li i {
            color: var(--primary);
            font-size: 1.2rem;
            margin-top: 4px;
        }
.value-list li strong {
            color: var(--text);
            font-weight: 700;
        }
.value-list li span {
            color: var(--text);
            opacity: 0.9;
        }
.timeline {
            position: relative;
            padding-left: 32px;
            margin: 32px 0;
        }
.timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--primary);
            opacity: 0.3;
        }
.timeline-item {
            position: relative;
            margin-bottom: 32px;
        }
.timeline-item::before {
            content: '';
            position: absolute;
            left: -29px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg);
        }
.timeline-item .timeline-date {
            font-weight: 700;
            color: var(--primary);
            font-size: 0.9rem;
            margin-bottom: 8px;
            display: block;
        }
.timeline-item .timeline-content {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            box-shadow: var(--shadow-light);
        }
.timeline-item .timeline-content p {
            margin-bottom: 0;
        }
.about-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            padding: 60px 0;
            text-align: center;
        }
.about-cta h2 {
            color: #fff;
            font-weight: 800;
            font-size: 1.8rem;
            margin-bottom: 16px;
        }
.about-cta p {
            color: rgba(255,255,255,0.9);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
.about-cta .btn-hero-primary {
            background: #fff;
            color: var(--primary);
            border: none;
            padding: 14px 40px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1.05rem;
            transition: all 0.3s ease;
        }
.about-cta .btn-hero-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
        }
.about-hero .page-title {
                font-size: 2rem;
            }
.stats-row {
                grid-template-columns: 1fr;
                gap: 16px;
            }
.about-section h2 {
                font-size: 1.5rem;
            }

/* --- 子页面追加 --- */
/* 免责声明页面专属样式 */
    .disclaimer-section {
      max-width: 900px;
      margin: 0 auto;
    }
.disclaimer-block {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 2rem 2.5rem;
      margin-bottom: 1.5rem;
      box-shadow: var(--shadow-light);
      border: 1px solid rgba(100, 116, 139, 0.1);
    }
.disclaimer-block h2 {
      color: var(--text);
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 2px solid var(--accent);
      display: inline-block;
    }
.disclaimer-block p, .disclaimer-block li {
      color: var(--text);
      font-size: 0.95rem;
      line-height: 1.8;
      opacity: 0.9;
    }
.disclaimer-block ul {
      padding-left: 1.2rem;
    }
.disclaimer-block li {
      margin-bottom: 0.5rem;
    }
.contact-box {
      background: rgba(100, 116, 139, 0.06);
      border-radius: var(--radius-card);
      padding: 1.5rem;
      margin-top: 1.5rem;
      border: 1px dashed var(--accent);
    }
.contact-box p {
      margin-bottom: 0.3rem;
    }
.disclaimer-block {
        padding: 1.2rem 1.2rem;
      }

/* --- 子页面追加 --- */
/* 本页专属小样式 —— 观影指南页 */
    .guide-hero { background: var(--bg); padding: 70px 0 30px; }
.guide-hero h1 { color: var(--text); font-weight: 900; font-size: 2.4rem; }
.guide-hero .sub { color: #475569; font-size: 1.1rem; max-width: 720px; margin: 12px auto 0; }
.guide-section { padding: 50px 0; }
.guide-section.alt { background: #e9eef3; }
.guide-card { background: var(--card-bg); border-radius: var(--radius-card); box-shadow: var(--shadow-light); padding: 30px; height: 100%; transition: box-shadow .3s, transform .3s; }
.guide-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.guide-card .num { display: inline-block; background: var(--primary); color: #fff; width: 36px; height: 36px; border-radius: 50%; text-align: center; line-height: 36px; font-weight: 700; font-size: 1rem; margin-bottom: 16px; }
.guide-card h3 { color: var(--text); font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; }
.guide-card p, .guide-card li { color: #334155; font-size: .95rem; line-height: 1.75; }
.guide-card ul { padding-left: 18px; }
.guide-card ul li { margin-bottom: 6px; }
.step-list { list-style: none; padding-left: 0; counter-reset: step; }
.step-list li { counter-increment: step; position: relative; padding-left: 48px; margin-bottom: 18px; color: #334155; font-size: .96rem; line-height: 1.7; }
.step-list li::before { content: counter(step); position: absolute; left: 0; top: 2px; background: var(--accent); color: #fff; width: 32px; height: 32px; border-radius: 50%; text-align: center; line-height: 32px; font-weight: 700; font-size: .9rem; }
.tip-box { background: rgba(100, 116, 139, .08); border-left: 4px solid var(--primary); border-radius: 8px; padding: 16px 18px; margin: 20px 0; color: #1e293b; font-size: .94rem; }
.tip-box i { color: var(--primary); margin-right: 6px; }
.faq-list .faq-item { background: var(--card-bg); border-radius: 12px; box-shadow: var(--shadow-light); padding: 20px 24px; margin-bottom: 16px; }
.faq-list .faq-item h4 { color: var(--text); font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.faq-list .faq-item p { color: #334155; font-size: .93rem; line-height: 1.7; margin: 0; }
.faq-list .faq-item i { color: var(--accent); margin-right: 8px; }
.shortcut-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 18px; }
.shortcut-row a { background: var(--card-bg); color: var(--text); border: 1px solid #dde3ea; padding: 10px 22px; border-radius: var(--radius-full); font-weight: 500; text-decoration: none; font-size: .92rem; transition: all .25s; box-shadow: var(--shadow-light); }
.shortcut-row a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.cta-box { background: linear-gradient(135deg, #64748b 0%, #475569 100%); border-radius: 20px; padding: 40px 30px; text-align: center; color: #fff; margin-top: 30px; }
.cta-box h3 { color: #fff; font-weight: 800; font-size: 1.5rem; margin-bottom: 12px; }
.cta-box p { color: rgba(255,255,255,.85); margin-bottom: 20px; font-size: 1rem; }
.cta-box .btn-hero-primary { background: #fff; color: var(--primary); border: none; font-weight: 700; padding: 12px 32px; border-radius: var(--radius-full); text-decoration: none; display: inline-block; transition: all .25s; }
.cta-box .btn-hero-primary:hover { background: #e2e8f0; transform: scale(1.03); }
.guide-hero h1 { font-size: 1.8rem; }
.guide-card { padding: 22px; }

/* --- 子页面追加 --- */
/* 仅覆盖个别 Bootstrap 组件的白底，其余复用全局样式表 */
        .list-group-item {
            background: var(--card-bg);
            color: var(--text);
            border-color: rgba(100,116,139,.15);
        }
.table {
            --bs-table-bg: var(--card-bg);
            color: var(--text);
            border-color: rgba(100,116,139,.1);
        }
.table thead th {
            background: #e9edf3;
            color: var(--text);
            font-weight: 600;
        }
.table td {
            color: var(--text);
        }
/* 榜单卡片阴影微调 */
        .rank-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-light);
            transition: box-shadow .2s;
            padding: 1.25rem;
            height: 100%;
        }
.rank-card:hover {
            box-shadow: var(--shadow-hover);
        }
.rank-badge {
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            display: inline-block;
            min-width: 2.2rem;
            text-align: center;
            border-radius: var(--radius-full);
            padding: .2rem .6rem;
            font-size: .95rem;
        }
.rank-badge.gold { background: #c99b3f; }
.rank-badge.silver { background: #9aa5b1; }
.rank-badge.bronze { background: #b08b6b; }
.rank-cover {
            width: 64px;
            height: 88px;
            object-fit: cover;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,.08);
        }
.text-muted-strong {
            color: #55657b;
        }
.btn-rank-toggle {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-full);
            padding: .3rem 1rem;
            font-size: .9rem;
        }
.btn-rank-toggle:hover {
            background: #556b84;
        }
.btn-rank-toggle.active {
            background: var(--accent);
        }
.table-responsive {
            border-radius: 12px;
        }
.friend-links a {
            color: var(--primary);
            margin-right: 1.5rem;
        }
.friend-links a:hover { text-decoration: underline; }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }