:root {
            --primary: #2563eb;
            --accent: #06b6d4;
            --bg: #f4f8ff;
            --ink: #0f1e3d;
            --radius: 0px; /* 全直角 */
            --border-w: 2px;
            --shadow: 6px 6px 0 rgba(15,30,61,0.1);
            --card-bg: #ffffff;
        }
        * { border-radius: 0 !important; }
        body {
            background-color: var(--bg);
            color: var(--ink);
            font-family: 'Noto Sans SC', 'Inter', sans-serif;
            font-size: 0.95rem;
            line-height: 1.5;
        }
        h1, h2, h3, .font-serif { font-family: 'Noto Serif SC', serif; font-weight: 700; }

        /* 直角硬朗风格 */
        .card, .list-group-item, .btn, .accordion-item, .bg-white, .border, .poster-card {
            border-radius: 0 !important;
            border: var(--border-w) solid var(--ink) !important;
            box-shadow: var(--shadow);
        }
        .navbar, .footer { border-bottom: 2px solid var(--ink); }
        .navbar.bg-transparent { background: rgba(255,255,255,0.7) !important; backdrop-filter: blur(10px); transition: background 0.2s; }
        .navbar.scrolled { background: rgba(255,255,255,0.95) !important; box-shadow: 0 4px 12px rgba(0,0,0,0.05); }

        .poster-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
            width: 100%;
        }
        .poster-grid .poster-card img {
            aspect-ratio: 2 / 3;
            object-fit: cover;
            width: 100%;
            display: block;
        }
        @media (max-width: 768px) { .poster-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 576px) { .poster-grid { grid-template-columns: repeat(2, 1fr); gap: 0.8rem; } }

        .poster-card {
            background: var(--card-bg);
            transition: transform .15s ease, border-color .2s;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        .poster-card:hover { transform: scale(1.02); border-color: var(--primary) !important; box-shadow: 8px 8px 0 rgba(37,99,235,0.1); }
        .poster-card .overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(15,30,61,0.5) 0%, transparent 40%); display: flex; align-items: flex-end; justify-content: center; opacity: 0; transition: .2s; }
        .poster-card:hover .overlay { opacity: 1; }
        .poster-card .play-icon { color: white; font-size: 2.5rem; margin-bottom: 1rem; text-shadow: 2px 2px 0 rgba(0,0,0,0.5); }

        /* 底部抽屉弹窗 */
        .drawer-modal { position: fixed; inset: 0; background: rgba(15,30,61,0.5); display: none; z-index: 1080; }
        .drawer-panel { position: absolute; bottom: 0; left: 0; right: 0; background: white; padding: 1.5rem; transform: translateY(100%); transition: .3s ease; max-height: 80vh; overflow-y: auto; border-top: 3px solid var(--primary); }
        .drawer-modal.show .drawer-panel { transform: translateY(0); }
        .drawer-close { float: right; font-size: 1.5rem; background: none; border: 0; }

        /* 编号区块 */
        .section-number { font-family: 'Inter', monospace; font-weight: 800; font-size: 2rem; color: var(--primary); margin-right: .5rem; }

        /* 对比表格 */
        .compare-table td { padding: .8rem; border-bottom: 1px solid #ccc; vertical-align: top; }
        .compare-table tr:last-child td { border: 0; }

        /* 硬阴影 */
        .btn-outline-dark, .btn-primary { box-shadow: 4px 4px 0 var(--ink); }
        .btn-primary { background: var(--primary); border: 2px solid var(--ink); }
        .btn-primary:hover { background: #1d4ed8; box-shadow: 6px 6px 0 var(--ink); }
        .btn-outline-dark { background: white; }
        .btn-outline-dark:hover { background: #eef3ff; }

        /* 资讯/卡片 */
        .news-title { font-weight: 600; }
        .underline-hover { text-underline-offset: 4px; }
        .underline-hover:hover { text-decoration: underline; }

        /* 布局 */
        .section-pad { padding: 3rem 0; }
        .bg-hero-parallax { background-attachment: fixed; background-position: center; background-size: cover; }

        /* 广告占位符友链 */
        .friend-link-box { background: rgba(255,255,255,0.5); border-top: 2px dashed var(--primary); padding: 1rem 0; margin-top: 2rem; }

/* --- 子页面追加 --- */
/* 本页专属微调 */
        .guide-hero {
            background: linear-gradient(135deg, rgba(37,99,235,0.08) 0%, rgba(6,182,212,0.05) 100%);
            border-bottom: var(--border-w) solid var(--primary);
        }
.guide-section-title {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            color: var(--ink);
        }
.guide-section-title .section-number {
            background: var(--primary);
            color: #fff;
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
.guide-card {
            background: var(--card-bg);
            border: var(--border-w) solid var(--ink);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2rem;
            height: 100%;
            transition: transform .25s ease, box-shadow .25s ease;
        }
.guide-card:hover {
            transform: translate(-3px, -3px);
            box-shadow: 10px 10px 0 rgba(15,30,61,0.12);
        }
.guide-card .icon-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
        }
.guide-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--ink);
        }
.guide-card p {
            color: #3a4a6b;
            line-height: 1.75;
            font-size: 0.95rem;
            margin-bottom: 0;
        }
.guide-card ul {
            padding-left: 1.2rem;
            margin-top: 0.6rem;
            color: #3a4a6b;
            line-height: 1.9;
            font-size: 0.95rem;
        }
.guide-card ul li::marker {
            color: var(--primary);
        }
.step-list {
            counter-reset: step;
            list-style: none;
            padding-left: 0;
        }
.step-list li {
            counter-increment: step;
            position: relative;
            padding-left: 3rem;
            margin-bottom: 1.4rem;
            line-height: 1.8;
            color: #2a3a5c;
        }
.step-list li::before {
            content: counter(step);
            position: absolute;
            left: 0;
            top: 0;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }
.tip-box {
            background: rgba(6,182,212,0.08);
            border-left: 4px solid var(--accent);
            padding: 1.2rem 1.5rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin-top: 1.5rem;
        }
.tip-box p {
            margin-bottom: 0;
            color: #1e3a5f;
            font-size: 0.95rem;
            line-height: 1.8;
        }
.tip-box i {
            color: var(--accent);
            margin-right: 8px;
        }
.guide-card {
                padding: 1.5rem;
            }
.guide-hero h1 {
                font-size: 1.8rem;
            }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-button { background:rgba(0,0,0,.03) !important; color:#0f1e3d !important; }
.accordion-body { background:transparent !important; color:#0f1e3d !important; }
.accordion-header { background:transparent !important; }