/* 设计种子 1948 —— 全直角硬朗 + 深蓝紫暗色影院风 */
        :root {
            --primary: #6d5dfc;
            --accent: #22d3ee;
            --bg-dark: #0f1020;
            --text-light: #e8eaf6;
            --surface-dark: #1b1d2e;
            --border-thick: 3px solid #2d2f42;
            --shadow-hard: 6px 6px 0px #00000080;
            --radius-0: 0px;
        }

        body {
            background-color: var(--bg-dark);
            color: var(--text-light);
            font-family: 'Noto Sans SC', 'Inter', sans-serif;
            font-weight: 400;
            letter-spacing: 0.2px;
            font-size: 0.95rem;
        }

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

        /* 全直角 + 硬阴影 */
        .card, .poster-card, .list-group-item, .navbar, .hero-stats, .table, .modal-content, .faq-item, .friend-links {
            border-radius: 0 !important;
            border: var(--border-thick);
            box-shadow: var(--shadow-hard);
        }

        /* 导航栏吸顶 + 滚动透明 */
        .navbar {
            background: rgba(15, 16, 32, 0.85);
            backdrop-filter: blur(8px);
            border-bottom: 3px solid #2d2f42;
            border-radius: 0;
            transition: background 0.2s;
            padding: 0.5rem 1rem;
            z-index: 999;
        }
        .navbar.scrolled {
            background: rgba(15, 16, 32, 0.7);
            box-shadow: 0 4px 20px rgba(0,0,0,0.5);
        }

        .navbar-brand {
            font-family: 'Noto Serif SC', serif;
            font-weight: 900;
            font-size: 1.8rem;
            color: var(--accent) !important;
            text-shadow: 2px 2px 0 #000;
            letter-spacing: 1px;
        }

        .navbar .nav-link {
            color: var(--text-light) !important;
            font-weight: 500;
            margin: 0 0.3rem;
            border-bottom: 2px solid transparent;
            transition: 0.1s;
        }
        .navbar .nav-link:hover {
            border-bottom: 2px solid var(--primary);
            color: white !important;
        }

        /* 区块标题 */
        .section-title {
            border-left: 8px solid var(--primary);
            padding-left: 1rem;
            margin: 2.5rem 0 1.5rem;
            font-weight: 900;
            font-size: 1.8rem;
            letter-spacing: 1px;
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-title i {
            color: var(--accent);
        }

        /* 海报卡片 */
        .poster-card {
            background: var(--surface-dark);
            transition: transform 0.1s, box-shadow 0.1s;
            cursor: pointer;
            border: 2px solid #33354a;
            box-shadow: 5px 5px 0 #00000070;
            overflow: hidden;
            position: relative;
        }
        .poster-card:hover {
            transform: translate(-2px, -2px);
            box-shadow: 8px 8px 0 rgba(109, 93, 252, 0.3);
            border-color: var(--primary);
        }
        .poster-card img {
            width: 100%;
            aspect-ratio: 2/3;
            object-fit: cover;
            background: #2a2c40;
            display: block;
            transition: opacity 0.2s;
        }
        /* 渐变遮罩 + 播放按钮浮层 */
        .poster-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15,16,32,0.9) 0%, rgba(0,0,0,0.3) 40%, transparent 60%);
            opacity: 0;
            transition: 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .poster-card:hover .poster-overlay {
            opacity: 1;
        }
        .play-icon {
            font-size: 3.5rem;
            color: var(--accent);
            text-shadow: 2px 2px 0 #000;
            background: rgba(0,0,0,0.6);
            padding: 10px 20px;
            border: 2px solid var(--accent);
            transform: scale(0.8);
            transition: 0.1s;
        }
        .poster-card:hover .play-icon {
            transform: scale(1);
        }
        .card-body {
            padding: 0.5rem 0.75rem;
            background: var(--surface-dark);
            border-top: 2px solid #2d2f42;
        }
        .card-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.2rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .card-subtitle {
            font-size: 0.75rem;
            color: #aab;
            display: flex;
            justify-content: space-between;
        }

        /* 横向滑动区 */
        .hscroll {
            display: flex;
            flex-wrap: nowrap;
            overflow-x: auto;
            gap: 15px;
            padding-bottom: 15px;
            scrollbar-width: thin;
            scrollbar-color: var(--primary) #2d2f42;
        }
        .hscroll .poster-card {
            flex: 0 0 160px;
        }

        /* 分类矩阵 */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
            gap: 16px;
        }

        /* 排行榜表格风格 */
        .rank-table {
            background: var(--surface-dark);
            border: var(--border-thick);
            box-shadow: var(--shadow-hard);
        }
        .rank-table th {
            background: var(--primary);
            color: white;
            border-bottom: 2px solid black;
            font-weight: 600;
            padding: 0.5rem;
        }
        .rank-table td {
            padding: 0.4rem 0.6rem;
            border-bottom: 1px solid #2f3150;
        }

        /* 翻转卡片弹窗 */
        .modal-content {
            background: var(--surface-dark);
            border: 3px solid var(--primary);
            box-shadow: 10px 10px 0 #00000080;
        }
        .modal-header, .modal-body {
            border-bottom: 2px solid #33354a;
        }
        .btn-close {
            filter: invert(1);
        }

        /* 对比表格 */
        .compare-table {
            background: #181a2c;
            border: 3px solid #3d3f5e;
        }
        .compare-table td, .compare-table th {
            border: 2px solid #2d2f42;
            padding: 10px;
        }

        /* 数字英雄 */
        .hero-stats {
            display: flex;
            gap: 2rem;
            justify-content: space-around;
            background: linear-gradient(145deg, #151730, #0f1020);
            padding: 1.5rem;
            border: var(--border-thick);
            box-shadow: var(--shadow-hard);
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .stat-item {
            font-family: 'Noto Serif SC', serif;
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent);
            text-shadow: 4px 4px 0 #000;
        }
        .stat-label {
            color: var(--text-light);
            font-weight: 500;
        }

        footer {
            background: #0b0c16;
            border-top: 4px solid var(--primary);
            margin-top: 4rem;
        }
        .friend-links {
            background: var(--surface-dark);
            padding: 1.5rem;
            margin: 3rem 0;
        }
        .friend-links a {
            color: var(--accent);
            margin-right: 1.5rem;
            text-decoration: underline dotted;
        }
        .faq-item, .tip-list li {
            background: #1a1c2c;
            padding: 0.7rem 1rem;
            margin-bottom: 0.6rem;
            border-left: 4px solid var(--primary);
        }
        .btn-primary-custom {
            background: var(--primary);
            border: 2px solid black;
            box-shadow: 4px 4px 0 #000;
            border-radius: 0;
            color: white;
            font-weight: 600;
        }
        .btn-primary-custom:hover {
            background: var(--accent);
            color: black;
        }

        /* 错落滚动渐显 */
        .reveal-card {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 0.6s forwards;
        }
        @keyframes fadeUp {
            to { opacity: 1; transform: translateY(0); }
        }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }

/* --- 子页面追加 --- */
/* 关于页专属补充样式 */
        .about-hero {
            padding: 60px 0 30px;
        }
.about-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 15px;
            letter-spacing: 1px;
        }
.about-hero h1 span {
            color: var(--primary);
        }
.about-hero .lead {
            color: rgba(232, 234, 246, 0.75);
            font-size: 1.05rem;
            max-width: 720px;
            line-height: 1.8;
        }
.about-section {
            padding: 35px 0;
            border-bottom: 1px solid rgba(45, 47, 66, 0.6);
        }
.about-section:last-child {
            border-bottom: none;
        }
.about-section .section-title {
            font-size: 1.45rem;
            margin-bottom: 20px;
            position: relative;
            padding-left: 18px;
        }
.about-section .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            background: var(--primary);
        }
.about-content p {
            color: rgba(232, 234, 246, 0.85);
            line-height: 1.9;
            margin-bottom: 15px;
            font-size: 0.95rem;
        }
.about-content strong {
            color: var(--accent);
            font-weight: 600;
        }
.feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
            margin-top: 25px;
        }
.feature-item {
            background: var(--surface-dark);
            border: var(--border-thick);
            box-shadow: var(--shadow-hard);
            padding: 22px 20px;
            transition: transform 0.3s ease;
        }
.feature-item:hover {
            transform: translateY(-5px);
        }
.feature-item i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
            display: block;
        }
.feature-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 10px;
        }
.feature-item p {
            font-size: 0.88rem;
            color: rgba(232, 234, 246, 0.7);
            line-height: 1.7;
            margin: 0;
        }
.stats-band {
            background: var(--surface-dark);
            border: var(--border-thick);
            box-shadow: var(--shadow-hard);
            padding: 25px 20px;
            margin: 30px 0;
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
        }
.stats-band .stat-item {
            text-align: center;
            min-width: 140px;
        }
.stats-band .stat-item .stat-label {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
        }
.stats-band .stat-item .stat-text {
            font-size: 0.85rem;
            color: rgba(232, 234, 246, 0.7);
            margin-top: 5px;
        }
.timeline-list {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }
.timeline-list li {
            position: relative;
            padding: 0 0 25px 30px;
            border-left: 2px solid var(--primary);
            margin-left: 12px;
        }
.timeline-list li::before {
            content: '';
            position: absolute;
            left: -8px;
            top: 4px;
            width: 14px;
            height: 14px;
            background: var(--primary);
            border: 2px solid var(--bg-dark);
            border-radius: 50%;
        }
.timeline-list li:last-child {
            border-left-color: transparent;
            padding-bottom: 0;
        }
.timeline-list .time {
            font-size: 0.8rem;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 4px;
            display: block;
        }
.timeline-list .desc {
            font-size: 0.92rem;
            color: rgba(232, 234, 246, 0.8);
            line-height: 1.7;
        }
.promise-box {
            background: rgba(109, 93, 252, 0.08);
            border: 1px solid rgba(109, 93, 252, 0.3);
            padding: 20px 25px;
            margin: 20px 0;
            border-radius: 0;
        }
.promise-box p {
            margin-bottom: 8px;
        }
.promise-box p:last-child {
            margin-bottom: 0;
        }
.promise-box i {
            color: var(--accent);
            margin-right: 8px;
        }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .guide-hero { padding: 60px 0 30px; border-bottom: var(--border-thick); }
.guide-hero h1 { font-size: 2.4rem; font-weight: 900; margin-bottom: 12px; }
.guide-hero .lead { color: var(--accent); font-weight: 500; }
.guide-section { padding: 50px 0; border-bottom: 1px solid #2d2f42; }
.guide-section:last-of-type { border-bottom: none; }
.step-card { background: var(--surface-dark); border: var(--border-thick); border-radius: var(--radius-0); padding: 24px; margin-bottom: 20px; box-shadow: var(--shadow-hard); transition: transform .2s; }
.step-card:hover { transform: translate(-2px, -2px); }
.step-num { display: inline-block; background: var(--primary); color: #fff; font-weight: 900; width: 34px; height: 34px; line-height: 34px; text-align: center; margin-right: 10px; font-size: 1.1rem; }
.step-card h3 { font-size: 1.25rem; font-weight: 700; color: var(--text-light); display: inline; vertical-align: middle; }
.step-card p { color: rgba(232,234,246,.75); margin-top: 12px; margin-bottom: 0; line-height: 1.8; }
.tip-box { background: rgba(109,93,252,.08); border-left: 4px solid var(--primary); padding: 16px 18px; margin: 20px 0; }
.tip-box i { color: var(--accent); margin-right: 8px; }
.tip-box span { color: var(--text-light); }
.feature-item h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.criteria-list { list-style: none; padding: 0; }
.criteria-list li { padding: 12px 16px; background: var(--surface-dark); border-left: 4px solid var(--accent); margin-bottom: 12px; color: var(--text-light); }
.criteria-list li strong { color: var(--accent); }
.faq-item { background: var(--surface-dark); border: 2px solid #2d2f42; padding: 20px; margin-bottom: 16px; }
.faq-item h4 { color: var(--primary); font-weight: 700; margin-bottom: 8px; }
.faq-item p { margin: 0; color: rgba(232,234,246,.75); }
.guide-hero h1 { font-size: 1.8rem; }
.guide-section { padding: 36px 0; }
.step-card h3 { font-size: 1.1rem; }

/* --- 子页面追加 --- */
/* 隐私页特有的小卡片，复用 .card 变量但微调间距 */
        .privacy-block {
            background: var(--surface-dark);
            border: var(--border-thick);
            box-shadow: var(--shadow-hard);
            padding: 2rem 1.8rem;
            border-radius: var(--radius-0);
            margin-bottom: 2rem;
        }
.privacy-block h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            border-left: 5px solid var(--accent);
            padding-left: 1rem;
            margin-bottom: 1.5rem;
            letter-spacing: 0.5px;
        }
.privacy-block h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-light);
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
.privacy-block p, .privacy-block li {
            color: #c6c9e2;
            line-height: 1.8;
            font-size: 0.98rem;
        }
.privacy-block ul {
            padding-left: 1.2rem;
            list-style-type: none;
        }
.privacy-block ul li::before {
            content: "▹";
            color: var(--accent);
            font-weight: bold;
            display: inline-block;
            width: 1.2rem;
            margin-left: -1.2rem;
        }
.highlight-chip {
            display: inline-block;
            background: rgba(109, 93, 252, 0.15);
            border: 1px solid var(--primary);
            padding: 0.2rem 0.9rem;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--accent);
            margin-right: 0.4rem;
        }
.muted-text {
            color: #8f93b0;
            font-size: 0.9rem;
        }
.border-accent-bottom {
            border-bottom: 2px solid var(--accent);
            display: inline-block;
            padding-bottom: 2px;
        }
/* 覆盖 Bootstrap 可能的白底 */
        .accordion-item, .accordion-button {
            background: var(--surface-dark) !important;
            color: var(--text-light) !important;
            border: 1px solid var(--border-thick) !important;
        }
.btn-outline-custom {
            border: 1px solid var(--primary);
            color: var(--primary);
            background: transparent;
            transition: all 0.2s;
        }
.btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }