/* 深空蓝紫 · 全直角硬朗风 · 粗边框 · 块状硬阴影 */
        :root {
            --brand-primary: #818cf8;
            --brand-accent: #c084fc;
            --brand-bg: #1e1b4b;
            --brand-text: #e0e7ff;
            --brand-border: #4c4a7f;
            --brand-dark: #151235;
            --brand-hard-shadow: 6px 6px 0px rgba(0, 0, 0, 0.7);
            --brand-hard-shadow-sm: 3px 3px 0px rgba(0, 0, 0, 0.6);
        }

        * {
            border-radius: 0 !important; /* 全直角 */
            box-sizing: border-box;
        }

        body {
            background-color: var(--brand-bg);
            color: var(--brand-text);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            font-size: 0.95rem; /* 小字号高密度 */
            line-height: 1.5;
            letter-spacing: 0.01em;
            background-image: 
                radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.02) 1px, transparent 0),
                linear-gradient(145deg, rgba(24, 20, 60, 0.8) 0%, rgba(30, 27, 75, 0.9) 100%);
            background-size: 12px 12px, cover;
        }

        /* 滚动进度条 (顶部) */
        #scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            height: 4px;
            width: 0%;
            background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
            z-index: 9999;
            transition: width 0.1s ease;
            box-shadow: 0 0 8px rgba(192, 132, 252, 0.5);
        }

        /* 导航粗硬风格 */
        .navbar-hard {
            background-color: rgba(21, 18, 53, 0.98);
            border-bottom: 3px solid var(--brand-primary);
            box-shadow: 0 4px 0 rgba(0, 0, 0, 0.5);
            padding: 0.4rem 1rem;
        }
        .navbar-hard .navbar-brand {
            font-weight: 900;
            font-size: 1.8rem;
            color: var(--brand-text);
            letter-spacing: -0.03em;
            text-transform: uppercase;
            text-shadow: 2px 2px 0 var(--brand-primary);
            margin-right: 1.2rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .navbar-hard .navbar-brand i {
            color: var(--brand-accent);
            font-size: 1.6rem;
        }
        .navbar-hard .nav-link {
            color: var(--brand-text) !important;
            font-weight: 600;
            text-transform: uppercase;
            font-size: 0.8rem;
            padding: 0.6rem 0.9rem !important;
            border-left: 1px solid var(--brand-border);
            transition: all 0.1s;
        }
        .navbar-hard .nav-link:hover {
            background: rgba(129, 140, 248, 0.15);
            color: var(--brand-accent) !important;
            box-shadow: inset 0 -3px 0 var(--brand-primary);
        }
        .navbar-toggler {
            border: 2px solid var(--brand-primary) !important;
            color: var(--brand-text) !important;
        }

        /* 硬块风格通用卡片/区块 */
        .hard-card {
            background-color: rgba(255, 255, 255, 0.03);
            border: 2px solid var(--brand-border);
            box-shadow: var(--brand-hard-shadow);
            transition: transform 0.15s ease, box-shadow 0.15s ease;
            backdrop-filter: blur(2px);
        }
        .hard-card:hover {
            transform: translateY(-4px);
            box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.8);
        }

        .section-title {
            font-size: 1.7rem;
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: -0.01em;
            border-left: 8px solid var(--brand-accent);
            padding-left: 1rem;
            margin: 2rem 0 1.2rem;
            color: var(--brand-text);
        }
        .section-title i {
            color: var(--brand-primary);
            margin-right: 6px;
        }

        /* Hero 视差区块 */
        .hero-parallax {
            position: relative;
            background: url('{随机图片}') no-repeat center center / cover;
            min-height: 62vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background-attachment: fixed; /* parallax */
            border-bottom: 4px solid var(--brand-primary);
            box-shadow: inset 0 -20px 50px rgba(0, 0, 0, 0.6);
        }
        .hero-parallax::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(21, 18, 53, 0.65);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 2rem 1rem;
        }
        .hero-content h1 {
            font-size: 3.8rem;
            font-weight: 900;
            color: white;
            text-shadow: 5px 5px 0 var(--brand-primary);
            letter-spacing: -0.02em;
        }
        .hero-content p {
            font-size: 1.1rem;
            font-weight: 500;
            color: #f0ecff;
            background: rgba(0,0,0,0.3);
            display: inline-block;
            padding: 0.3rem 1rem;
            border: 2px solid var(--brand-primary);
            box-shadow: var(--brand-hard-shadow-sm);
        }

        /* 对比表格 */
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            border: 3px solid var(--brand-primary);
            background: rgba(10, 8, 30, 0.5);
        }
        .compare-table th, .compare-table td {
            padding: 0.8rem 1rem;
            border: 2px solid var(--brand-border);
            font-size: 0.9rem;
        }
        .compare-table thead th {
            background-color: #141136;
            color: var(--brand-accent);
            font-weight: 800;
            font-size: 1rem;
            text-transform: uppercase;
        }
        .compare-table tbody tr:nth-child(odd) {
            background: rgba(129, 140, 248, 0.08);
        }
        .compare-table td i.fa-check-circle {
            color: var(--brand-primary);
            margin-right: 6px;
        }
        .compare-table td i.fa-xmark-circle {
            color: #f87c7c;
            margin-right: 6px;
        }

        /* 特色图标列表 */
        .feature-item {
            border: 2px solid var(--brand-border);
            padding: 1rem 1.2rem;
            background: rgba(10, 8, 35, 0.5);
            box-shadow: var(--brand-hard-shadow-sm);
            height: 100%;
        }
        .feature-item i {
            font-size: 2.2rem;
            color: var(--brand-primary);
            margin-bottom: 0.7rem;
            display: block;
        }
        .feature-item h3 {
            font-size: 1rem;
            font-weight: 800;
            text-transform: uppercase;
            margin-bottom: 0.4rem;
        }
        .feature-item p {
            font-size: 0.8rem;
            opacity: 0.8;
            margin-bottom: 0;
        }

        /* 手风琴 FAQ */
        .accordion-hard .accordion-item {
            background: rgba(15, 12, 40, 0.8);
            border: 2px solid var(--brand-border);
            margin-bottom: 0.6rem;
            box-shadow: var(--brand-hard-shadow-sm);
        }
        .accordion-hard .accordion-button {
            background-color: #191642;
            color: var(--brand-text);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 0.8rem 1rem;
            box-shadow: none;
            border: none;
            text-transform: none;
        }
        .accordion-hard .accordion-button:not(.collapsed) {
            background-color: #211c4f;
            color: var(--brand-accent);
        }
        .accordion-hard .accordion-body {
            font-size: 0.85rem;
            border-top: 2px solid var(--brand-primary);
            background: #12102e;
        }

        /* CTA 区块 */
        .cta-section {
            border: 3px solid var(--brand-primary);
            background: #181341;
            box-shadow: var(--brand-hard-shadow);
            padding: 2rem 1.5rem;
            text-align: center;
        }
        .btn-outline-hard {
            border: 3px solid var(--brand-primary);
            background: transparent;
            color: var(--brand-text);
            font-weight: 700;
            padding: 0.6rem 2rem;
            box-shadow: var(--brand-hard-shadow-sm);
            transition: 0.1s;
            text-transform: uppercase;
        }
        .btn-outline-hard:hover {
            background: var(--brand-primary);
            color: #12102e;
            box-shadow: 5px 5px 0 var(--brand-accent);
        }

        /* 友情链接 & 页脚 */
        .friend-links {
            background: #17133b;
            border-top: 3px solid var(--brand-primary);
            border-bottom: 3px solid var(--brand-primary);
            padding: 1.2rem 0;
            margin-top: 2rem;
            font-size: 0.8rem;
        }
        .friend-links h4 {
            font-weight: 800;
            font-size: 0.9rem;
            display: inline-block;
            border-right: 2px solid var(--brand-primary);
            padding-right: 1rem;
            margin-right: 1rem;
        }
        .friend-links span a {
            color: var(--brand-text);
            margin-right: 1.2rem;
            text-decoration: underline dotted;
        }
        .footer-hard {
            background: #0e0b25;
            border-top: 3px solid var(--brand-accent);
            padding: 1.5rem 0;
            font-size: 0.8rem;
        }

        /* 通用调整 */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .text-accent { color: var(--brand-accent); }
        .text-primary-brand { color: var(--brand-primary); }
        .bg-translucent { background: rgba(20, 16, 50, 0.6); }
        hr { border-top: 2px solid var(--brand-border); opacity: 0.4; }
        a { color: var(--brand-primary); }

/* --- 子页面追加 --- */
/* 本页专属微调，保持整体风格一致 */
        .pricing-card { transition: transform 0.2s ease; }
.pricing-card:hover { transform: translateY(-4px); }
.plan-badge { position: absolute; top: -12px; right: 20px; }
.subscription-faq details { margin-bottom: 12px; }
.subscription-faq summary { cursor: pointer; font-weight: 600; }
.benefit-list li { margin-bottom: 8px; }
.current-plan { background: var(--brand-primary); color: var(--brand-dark); }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .guide-hero {
            background: linear-gradient(135deg, rgba(129, 140, 248, 0.15) 0%, rgba(192, 132, 252, 0.15) 100%), var(--brand-bg);
            border-bottom: 2px solid var(--brand-border);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
.guide-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(129, 140, 248, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }
.guide-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(192, 132, 252, 0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
.guide-hero-content {
            position: relative;
            z-index: 2;
        }
.guide-section {
            padding: 60px 0;
            border-bottom: 1px solid rgba(76, 74, 127, 0.3);
        }
.guide-section:last-of-type {
            border-bottom: none;
        }
.guide-card {
            background: rgba(21, 18, 53, 0.8);
            border: 1px solid var(--brand-border);
            border-radius: 12px;
            padding: 28px;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--brand-hard-shadow-sm);
        }
.guide-card-icon {
            font-size: 2rem;
            color: var(--brand-accent);
            margin-bottom: 16px;
        }
.guide-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--brand-text);
            margin-bottom: 12px;
        }
.guide-card p {
            color: rgba(224, 231, 255, 0.85);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
.guide-card ul {
            padding-left: 18px;
            color: rgba(224, 231, 255, 0.85);
            font-size: 0.95rem;
            line-height: 1.7;
        }
.guide-card ul li {
            margin-bottom: 6px;
        }
.step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--brand-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            border-radius: 8px;
            margin-right: 12px;
            box-shadow: 3px 3px 0px rgba(0, 0, 0, 0.3);
        }
.guide-toc {
            background: rgba(21, 18, 53, 0.6);
            border: 1px solid var(--brand-border);
            border-radius: 12px;
            padding: 28px;
            margin-bottom: 40px;
        }
.guide-toc h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--brand-primary);
            margin-bottom: 16px;
        }
.guide-toc a {
            display: block;
            color: var(--brand-text);
            text-decoration: none;
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 0.95rem;
            transition: all 0.2s ease;
        }
.guide-toc a:hover {
            background: rgba(129, 140, 248, 0.15);
            color: var(--brand-primary);
            padding-left: 18px;
        }
.guide-toc a i {
            margin-right: 8px;
            color: var(--brand-accent);
        }
.badge-guide {
            display: inline-block;
            background: rgba(129, 140, 248, 0.2);
            color: var(--brand-primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            border: 1px solid rgba(129, 140, 248, 0.3);
        }
.highlight-box {
            background: rgba(192, 132, 252, 0.1);
            border-left: 4px solid var(--brand-accent);
            padding: 20px 24px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
.highlight-box p {
            margin-bottom: 0;
            color: var(--brand-text);
            line-height: 1.7;
        }
.highlight-box strong {
            color: var(--brand-accent);
        }
.guide-hero {
                padding: 50px 0 40px;
            }
.guide-card {
                padding: 20px;
                margin-bottom: 20px;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .about-hero {
            background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-bg) 100%);
            border-bottom: 2px solid var(--brand-border);
        }
.about-section {
            background: transparent;
        }
.about-content-card {
            background: rgba(30, 27, 75, 0.6);
            border: 1px solid var(--brand-border);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 2rem;
            backdrop-filter: blur(8px);
        }
.about-content-card h3 {
            color: var(--brand-primary);
            font-weight: 700;
            margin-bottom: 1rem;
        }
.about-content-card p {
            color: var(--brand-text);
            line-height: 1.8;
            margin-bottom: 1rem;
        }
.about-content-card ul {
            color: var(--brand-text);
            padding-left: 1.5rem;
        }
.about-content-card li {
            margin-bottom: 0.5rem;
        }
.about-icon {
            color: var(--brand-accent);
            margin-right: 0.5rem;
        }
.timeline {
            border-left: 2px solid var(--brand-primary);
            padding-left: 1.5rem;
            margin-left: 0.5rem;
        }
.timeline-item {
            position: relative;
            margin-bottom: 1.5rem;
        }
.timeline-item::before {
            content: '';
            position: absolute;
            left: -1.85rem;
            top: 0.5rem;
            width: 12px;
            height: 12px;
            background: var(--brand-accent);
            border-radius: 50%;
            border: 2px solid var(--brand-dark);
        }
.timeline-item h4 {
            color: var(--brand-accent);
            font-weight: 600;
            margin-bottom: 0.3rem;
        }
.timeline-item p {
            color: var(--brand-text);
            margin-bottom: 0;
        }
.nav-link.active {
            color: var(--brand-accent) !important;
        }
.navbar-nav .nav-link[href="/about.html"] {
            color: var(--brand-accent) !important;
        }

/* --- 子页面追加 --- */
/* 确保 Bootstrap 组件配色与站点一致 (仅使用栅格与工具类, 组件自带类已覆盖) */
        .card, .card-body, .card-title, .card-text, .card-header, .card-footer,
        .form-control, .form-select, .form-label, .input-group-text,
        .table, .list-group-item, .accordion-item, .accordion-button, .accordion-body,
        .modal-content, .modal-header, .modal-body, .dropdown-menu, .dropdown-item,
        .nav-link, .navbar, .navbar-brand, .btn-light, .btn-outline-* {
            background: transparent;
            color: var(--brand-text);
            border-color: var(--brand-border);
        }
/* 针对输入框等特殊处理 */
        .form-control {
            background-color: rgba(0, 0, 0, 0.35);
            color: var(--brand-text);
            border: 1px solid var(--brand-border);
        }
.form-control::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }
.navbar {
            background-color: var(--brand-bg) !important;
        }
/* 覆盖 bootstrap 的 .card 背景 */
        .hard-card, .hard-card .card-body {
            background-color: var(--brand-bg);
            border: 1px solid var(--brand-border);
            box-shadow: var(--brand-hard-shadow-sm);
            color: var(--brand-text);
        }
/* 确保链接颜色 */
        a {
            color: var(--brand-primary);
        }
.footer-hard a {
            color: var(--brand-text);
        }
.footer-hard a:hover {
            color: var(--brand-primary);
        }
/* 小标题统一加粗 */
        .section-title {
            color: var(--brand-primary);
            font-weight: 800;
            letter-spacing: -0.02em;
        }
/* 页内锚点偏移 */
        .anchor-offset {
            scroll-margin-top: 80px;
        }

/* --- 子页面追加 --- */
/* 保证 Bootstrap 组件不会破坏深色视觉 */
        .card, .card-body, .card-title, .card-text, .card-header, .card-footer,
        .list-group-item, .accordion-item, .accordion-button, .accordion-body,
        .modal-content, .modal-header, .modal-body {
            background-color: var(--brand-dark);
            color: var(--brand-text);
            border-color: var(--brand-border);
        }
.form-control, .form-select {
            background-color: rgba(0,0,0,.35);
            color: var(--brand-text);
            border-color: var(--brand-border);
        }
.nav-link, .navbar-brand {
            color: var(--brand-text) !important;
        }
/* 本页额外调整 */
        .disclaimer-section {
            padding: 3rem 0;
        }
.legal-icon {
            color: var(--brand-accent);
            margin-right: 8px;
            font-size: 1.2rem;
        }
.friend-links a {
            color: var(--brand-text);
            opacity: .8;
            text-decoration: none;
            margin: 0 0.8rem;
            font-size: .9rem;
        }
.friend-links a:hover {
            opacity: 1;
            color: var(--brand-accent);
        }

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