/* ===== 暗红剧场主题变量 ===== */
    :root {
      --ph-main: #dc2626;
      --ph-accent: #fb923c;
      --ph-bg: #141013;
      --ph-text: #fef2f2;
      --ph-card-bg: #1f171c;
      --ph-border: #3a242e;
      --ph-radius: 8px;
      --ph-shadow: 0 4px 20px rgba(0,0,0,0.6);
    }
    * { box-sizing: border-box; }
    body {
      background-color: var(--ph-bg);
      color: var(--ph-text);
      font-family: 'Inter', system-ui, -apple-system, sans-serif;
      font-weight: 400;
      overflow-x: hidden;
    }
    h1,h2,h3,h4,.navbar-brand { font-weight: 800; letter-spacing: -0.02em; }
    .font-mono { font-family: 'SF Mono', 'Fira Code', monospace; }
    .text-gradient {
      background: linear-gradient(135deg, var(--ph-main), var(--ph-accent));
      -webkit-background-clip: text; background-clip: text; color: transparent;
    }
    /* 滚动进度条 */
    #progress-bar {
      position: fixed; top:0; left:0; height: 3px; width: 0%;
      background: linear-gradient(90deg, var(--ph-main), var(--ph-accent));
      z-index: 9999; transition: width 0.1s;
    }
    /* 顶部导航 */
    .navbar-piao {
      background: rgba(20,16,19,0.85);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--ph-border);
      padding: 12px 0;
    }
    .navbar-piao .navbar-brand {
      font-weight: 900; font-size: 1.8rem; color: var(--ph-text);
      display: flex; align-items: center; gap: 8px;
    }
    .navbar-piao .navbar-brand i { color: var(--ph-main); }
    .navbar-piao .nav-link {
      color: rgba(254,242,242,0.8);
      font-weight: 500;
      margin: 0 10px;
    }
    .navbar-piao .nav-link:hover { color: var(--ph-accent); }
    /* 区块通用 */
    .section-piao { padding: 70px 0; border-bottom: 1px solid var(--ph-border); }
    .section-title {
      font-size: 2.2rem; font-weight: 900; margin-bottom: 30px;
      position: relative; display: inline-block;
    }
    .section-title:after {
      content: ''; position: absolute; bottom: -8px; left: 0; width: 80px; height: 4px;
      background: linear-gradient(90deg, var(--ph-main), var(--ph-accent));
      border-radius: 8px;
    }
    /* 影片卡片 */
    .movie-card {
      background: var(--ph-card-bg);
      border-radius: var(--ph-radius);
      overflow: hidden;
      border: 1px solid #2c1e26;
      transition: transform 0.25s, box-shadow 0.3s;
      cursor: pointer;
      height: 100%;
      position: relative;
      box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }
    .movie-card:hover {
      transform: translateY(-5px) scale(1.02);
      box-shadow: 0 12px 28px rgba(0,0,0,0.8);
    }
    .poster-wrap {
      position: relative; overflow: hidden; aspect-ratio: 2/3;
    }
    .poster-wrap img {
      width: 100%; height: 100%; object-fit: cover;
      transition: transform 0.4s;
    }
    .movie-card:hover .poster-wrap img { transform: scale(1.08); }
    .poster-overlay {
      position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,0.9) 0%, transparent 50%);
      opacity: 0; transition: opacity 0.3s;
      display: flex; align-items: flex-end; padding: 15px;
    }
    .movie-card:hover .poster-overlay { opacity: 1; }
    .play-btn {
      width: 44px; height: 44px; border-radius: 50%;
      background: var(--ph-main); display: flex; align-items: center; justify-content: center;
      margin-bottom: 10px; color: #fff; font-size: 18px;
      box-shadow: 0 0 20px var(--ph-main);
    }
    .card-info { padding: 12px 10px 14px; }
    .card-info h5 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .rating-badge { color: var(--ph-accent); font-weight: 700; font-size: 0.9rem; }
    .card-meta { font-size: 0.75rem; color: #b3a0aa; }
    /* hero */
    .hero-piao {
      background: radial-gradient(circle at 20% 30%, rgba(220,38,38,0.3), transparent 60%), 
                  linear-gradient(160deg, #1a1218, #0e0a0d);
      padding: 100px 0 80px;
      border-bottom: 1px solid var(--ph-border);
      position: relative;
      overflow: hidden;
    }
    .hero-badge {
      display: inline-block; background: rgba(220,38,38,0.2);
      border: 1px solid var(--ph-main); padding: 6px 18px; border-radius: 40px;
      font-weight: 600; font-size: 0.9rem; color: var(--ph-accent);
    }
    /* 对比表格 */
    .compare-table { border-collapse: collapse; width: 100%; }
    .compare-table td, .compare-table th { padding: 12px 16px; border-bottom: 1px solid var(--ph-border); }
    .compare-table tr:last-child td { border-bottom: none; }
    /* 列表编号 */
    .tips-list { list-style: none; counter-reset: tip-counter; padding-left: 0; }
    .tips-list li { counter-increment: tip-counter; margin-bottom: 14px; display: flex; gap: 12px; }
    .tips-list li::before {
      content: counter(tip-counter) ".";
      font-family: monospace; font-weight: 800; color: var(--ph-accent);
    }
    /* 侧滑弹窗 */
    .detail-sidebar {
      position: fixed; top: 0; right: -480px; width: min(480px, 100vw);
      height: 100vh; background: #1a1116; z-index: 2000; transition: right 0.35s ease;
      box-shadow: -10px 0 40px rgba(0,0,0,0.6); border-left: 1px solid var(--ph-border);
      overflow-y: auto;
    }
    .detail-sidebar.active { right: 0; }
    .sidebar-backdrop {
      position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 1999; display: none;
    }
    .sidebar-backdrop.active { display: block; }
    .sidebar-content { padding: 30px; }
    .close-btn { background: none; border: none; color: var(--ph-text); font-size: 2rem; float: right; }
    /* 阅读进度 */
    #progress-bar { position: fixed; top:0; left:0; height: 3px; width: 0%; background: linear-gradient(90deg, var(--ph-main), var(--ph-accent)); z-index: 9999; }
    /* footer 友链 */
    .friend-links a { color: var(--ph-accent); margin-right: 15px; text-decoration: none; }
    footer { border-top: 1px solid var(--ph-border); background: #0f0a0e; }
    /* 入场动画 */
    .fade-up { opacity: 0; transform: translateY(20px); transition: opacity 0.5s, transform 0.5s; }
    .fade-up.in-view { opacity: 1; transform: translateY(0); }
    .floating-deco { animation: float 3s infinite alternate; }
    @keyframes float { from { transform: translateY(-5px); } to { transform: translateY(10px); } }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .about-hero {
            background: linear-gradient(135deg, var(--ph-bg) 0%, #2a1a20 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
.about-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(220, 38, 38, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
.about-section {
            padding: 60px 0;
            border-bottom: 1px solid var(--ph-border);
        }
.about-section:last-child {
            border-bottom: none;
        }
.feature-card {
            background: var(--ph-card-bg);
            border: 1px solid var(--ph-border);
            border-radius: var(--ph-radius);
            padding: 30px 25px;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--ph-shadow);
        }
.feature-icon {
            width: 55px;
            height: 55px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--ph-main), var(--ph-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            margin-bottom: 18px;
        }
.feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--ph-text);
        }
.feature-card p {
            color: rgba(254, 242, 242, 0.7);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
.timeline-item {
            position: relative;
            padding-left: 30px;
            padding-bottom: 30px;
            border-left: 2px solid var(--ph-border);
        }
.timeline-item:last-child {
            border-left-color: transparent;
            padding-bottom: 0;
        }
.timeline-item::before {
            content: '';
            position: absolute;
            left: -8px;
            top: 4px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--ph-main);
            box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
        }
.timeline-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--ph-accent);
        }
.timeline-item p {
            color: rgba(254, 242, 242, 0.7);
            font-size: 0.9rem;
            line-height: 1.7;
        }
.stats-badge {
            background: rgba(220, 38, 38, 0.1);
            border: 1px solid rgba(220, 38, 38, 0.3);
            border-radius: 50px;
            padding: 4px 14px;
            font-size: 0.85rem;
            color: var(--ph-accent);
            display: inline-block;
            margin-bottom: 15px;
        }
.about-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.3;
        }
.about-subtitle {
            color: rgba(254, 242, 242, 0.7);
            font-size: 1.05rem;
            line-height: 1.8;
            max-width: 700px;
        }
.guide-list {
            list-style: none;
            padding: 0;
        }
.guide-list li {
            padding: 15px 20px;
            background: var(--ph-card-bg);
            border: 1px solid var(--ph-border);
            border-radius: var(--ph-radius);
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 15px;
            transition: border-color 0.3s ease;
        }
.guide-list li:hover {
            border-color: var(--ph-main);
        }
.guide-list li i {
            color: var(--ph-accent);
            font-size: 1.1rem;
            margin-top: 3px;
        }
.guide-list li span {
            color: rgba(254, 242, 242, 0.8);
            font-size: 0.95rem;
            line-height: 1.6;
        }
.guide-list li strong {
            color: var(--ph-text);
            display: block;
            margin-bottom: 4px;
            font-size: 0.95rem;
        }
.about-hero {
                padding: 60px 0 40px;
            }
.about-title {
                font-size: 1.6rem;
            }

/* --- 子页面追加 --- */
/* 确保 Bootstrap 组件不破坏深色风格 */
        .card, .card-body, .list-group-item, .accordion-item, .accordion-body, .modal-content {
            background: var(--ph-card-bg) !important;
            color: var(--ph-text) !important;
            border-color: var(--ph-border) !important;
        }
.form-control, .form-select {
            background: rgba(0,0,0,0.35) !important;
            color: var(--ph-text) !important;
            border-color: var(--ph-border) !important;
        }
.form-control::placeholder {
            color: rgba(255,255,255,0.45) !important;
        }
.nav-link, .navbar-brand {
            color: var(--ph-text) !important;
        }
.navbar-toggler {
            border-color: var(--ph-border) !important;
            color: var(--ph-text) !important;
        }
/* 额外的分割装饰 */
        .disclaimer-rule {
            border-top: 1px dashed var(--ph-border);
            margin: 2rem 0;
        }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-button { background:rgba(255,255,255,.04) !important; color:#fef2f2 !important; }
.accordion-header { background:transparent !important; }
.accordion-button::after { filter: invert(1) grayscale(1) brightness(2); }