:root {
            /* 信任蓝 + 活力橙配色体系 */
            --bg: #F8FAFC;
            --surface: #FFFFFF;
            --text-main: #0F172A;
            --text-muted: #475569;
            --primary: #1E3A8A;   /* 深蓝 - 稳重 */
            --primary-light: #EFF6FF;
            --accent: #C2410C;    /* 深橙 - 白字按钮满足 WCAG AA */
            --accent-hover: #9A3412;
            --cta: #F97316;       /* 亮橙 CTA，深色文字保持可读性 */
            --cta-hover: #EA580C;
            --cta-text: #3B1105;
            --border: #E2E8F0;

            /* 间距与圆角 */
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            padding-bottom: 80px; /* 为移动端底部栏留空 */
        }

        a { color: #2563EB; text-decoration: none; transition: all 0.2s; }
        a:hover { color: #1D4ED8; text-decoration: underline; }
        :focus-visible { outline: 3px solid #2563EB; outline-offset: 3px; }

        .skip-link {
            position: fixed; top: 0.5rem; left: 0.5rem; z-index: 10000;
            padding: 0.65rem 0.9rem; border-radius: var(--radius-sm);
            background: #FFFFFF; color: var(--primary); font-weight: 700;
            box-shadow: var(--shadow-md); transform: translateY(-160%);
        }
        .skip-link:focus { transform: translateY(0); }
        .sr-only {
            position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
            overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
        }

        .container { max-width: 1100px; margin: 0 auto; padding: 16px; }

        /* 排版系统 */
        h1, h2, h3 { color: var(--text-main); font-weight: 700; line-height: 1.3; letter-spacing: 0; }
        h1 { font-size: 1.875rem; margin-bottom: 0.5rem; }
        h2 { font-size: 1.5rem; margin: 2.5rem 0 1.25rem; display: flex; align-items: center; gap: 0.5rem; }
        h2::before { content: ""; display: block; width: 6px; height: 24px; background: var(--accent); border-radius: 4px; }
        h3 { font-size: 1.125rem; margin-bottom: 0.5rem; }
        p { margin-bottom: 1rem; color: var(--text-muted); }

        /* 头部 Hero 区域 */
        header {
            text-align: center;
            padding: 3.5rem 1.5rem;
            background: linear-gradient(145deg, #1E3A8A 0%, #172554 100%);
            color: white;
            border-radius: var(--radius-lg);
            margin: 1rem 0 2rem;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        header h1 { color: white; font-size: 2.25rem; margin-bottom: 1rem; }
        header p { color: #E0E7FF; font-size: 1.125rem; max-width: 600px; margin: 0 auto 2rem; }
        .hero-eyebrow {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            padding: 4px 12px;
            border-radius: 99px;
            font-size: 0.875rem;
            color: #BFDBFE;
            margin-bottom: 1rem;
            font-weight: 500;
        }

        /* 导航栏 */
        .nav {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.75rem;
            padding: 1rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            box-shadow: var(--shadow-sm);
        }
        .nav a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.9375rem;
            padding: 0.375rem 0.75rem;
            border-radius: var(--radius-sm);
            transition: all 0.2s;
        }
        .nav a:hover { background: var(--primary-light); color: var(--primary); text-decoration: none; }

        /* 内容容器 */
        .content {
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 2rem;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            margin-bottom: 2rem;
        }

        /* 按钮系统 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.875rem 2rem;
            background: var(--accent);
            color: white;
            font-weight: 600;
            border-radius: var(--radius-sm);
            box-shadow: 0 4px 6px -1px rgba(194, 65, 12, 0.35);
            transition: transform 0.1s, box-shadow 0.1s;
            text-decoration: none !important;
        }
        .btn:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 6px 8px -1px rgba(154, 52, 18, 0.4); color: white; }
        .btn:active { transform: translateY(0); }
        .btn-primary {
            background: var(--cta); color: var(--cta-text) !important; white-space: nowrap;
            box-shadow: 0 4px 6px -1px rgba(234, 88, 12, 0.28);
        }
        .btn-primary:hover {
            background: var(--cta-hover); color: var(--cta-text) !important;
            box-shadow: 0 6px 8px -1px rgba(234, 88, 12, 0.34);
        }

        .btn-secondary {
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.3);
            box-shadow: none;
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.2); }

        /* 优惠码区域 */
        .promo-box {
            background: linear-gradient(to right, #FFF7ED, #FFEDD5);
            border: 1px solid #FED7AA;
            color: #9A3412;
            padding: 1rem 1.5rem;
            border-radius: var(--radius-md);
            text-align: center;
            font-weight: 600;
            margin: 1.5rem 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .promo-box code {
            background: white;
            padding: 0.375rem 1rem;
            border-radius: var(--radius-sm);
            border: 1px dashed #C2410C;
            font-family: monospace;
            color: #C2410C;
            font-size: 1.25rem;
            letter-spacing: 1px;
        }
        .copy-btn {
            background: white;
            border: 1px solid #FED7AA;
            color: #9A3412;
            padding: 0.375rem 1rem;
            border-radius: 99px;
            font-size: 0.875rem;
            cursor: pointer;
            transition: all 0.2s;
        }
        .copy-btn:hover { background: #FFF7ED; transform: scale(1.05); }

        /* 特性网格 */
        .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin: 2rem 0; }
        .feature-item {
            background: var(--surface);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: border-color 0.2s;
        }
        .feature-item:hover { border-color: var(--primary); }
        .feature-icon { font-size: 2rem; margin-bottom: 1rem; display: block; }
        .feature-title { font-weight: 700; color: var(--text-main); margin-bottom: 0.5rem; }

        /* 卡片与网格 */
        .decision-grid, .trust-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.5rem; margin-top: 1.5rem; }
        .products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; margin-top: 1.5rem; }

        .decision-card, .trust-card {
            background: var(--surface);
            border: 1px solid var(--border);
            padding: 1.5rem;
            border-radius: var(--radius-md);
            transition: all 0.2s;
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative; /* 为全卡片点击做准备 */
        }
        .decision-card:hover { border-color: #BFDBFE; box-shadow: var(--shadow-md); transform: translateY(-2px); cursor: pointer; }
        .decision-card h3 a { color: var(--primary); text-decoration: none; }

        /* 全卡片点击魔法：扩展主链接覆盖整个卡片 */
        .card-link::after {
            content: "";
            position: absolute;
            inset: 0;
            z-index: 5;
            cursor: pointer;
        }
        /* 保持卡片内其他按钮/链接在最上层 */
        .decision-card .btn, .decision-card a:not(.card-link), .product-card .btn, .product-card a:not(.card-link) {
            position: relative;
            z-index: 10;
        }

        .decision-card p { flex-grow: 1; }
        .decision-card .price-tag { color: var(--accent); font-weight: 700; font-size: 1.125rem; margin: 0.5rem 0; }

        /* 产品卡片特别样式 */
        .product-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all 0.2s;
            position: relative;
            display: flex;
            flex-direction: column;
        }
        .product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
        .product-header {
            background: #F1F5F9;
            padding: 1.5rem;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }
        .product-header h3 { margin: 0; font-size: 1.125rem; }
        .product-price { padding: 1rem; text-align: center; }
        .product-price .price { font-size: 2rem; font-weight: 800; color: var(--text-main); }
        .product-desc { padding: 0 1.5rem 1rem; font-size: 0.9375rem; color: var(--text-muted); flex-grow: 1; }
        .product-tags { padding: 0 1.5rem 1.5rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
        .tag {
            background: #EFF6FF;
            color: var(--primary);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            border: 1px solid #DBEAFE;
        }
        .highlight-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: #FEF3C7;
            color: #D97706;
            padding: 2px 8px;
            border-radius: 99px;
            font-size: 0.75rem;
            font-weight: 700;
            border: 1px solid #FDE68A;
        }

        /* 底部 */
        footer { text-align: center; padding: 3rem 1rem 6rem; color: var(--text-muted); border-top: 1px solid var(--border); margin-top: 4rem; background: var(--surface); }
        footer a { color: var(--text-main); font-weight: 500; }

        /* 移动端吸底 CTA */
        .mobile-sticky-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            padding: 12px 16px 24px; /* 适配 iPhone Home Bar */
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 10px rgba(0,0,0,0.05);
            z-index: 100;
            display: none;
            transform: translateY(100%);
            transition: transform 0.3s ease;
        }
        .mobile-sticky-cta.visible { transform: translateY(0); display: block; }
        .mobile-cta-btn {
            display: block;
            width: 100%;
            background: var(--accent);
            color: white;
            text-align: center;
            padding: 12px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
            text-decoration: none;
        }

        /* 响应式调整 */
        @media (max-width: 640px) {
            h1 { font-size: 1.75rem; }
            header { padding: 2rem 1rem; border-radius: 0 0 16px 16px; margin-top: 0; }
            .container { padding: 12px; }
            .decision-grid, .products-grid { grid-template-columns: 1fr; }
            .mobile-sticky-cta { display: block; }
            .promo-box { flex-direction: column; gap: 0.5rem; }
            .nav { padding: 0.75rem; gap: 0.5rem; justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; }
            .nav a { white-space: nowrap; font-size: 0.875rem; background: #F1F5F9; }
        }

        /* ===== Conversion layout extensions ===== */
        .muted { color: var(--text-muted); }
        .nav-conversion { justify-content: center; align-items: center; gap: 0.5rem; }
        .nav-conversion a.is-active { background: var(--primary-light); color: var(--primary); }
        .nav-conversion .nav-cta {
            background: var(--accent); color: #fff !important; font-weight: 700;
            padding: 0.45rem 0.9rem; border-radius: 999px;
            box-shadow: 0 4px 12px rgba(249,115,22,.28);
        }
        .nav-conversion .nav-cta:hover { background: var(--accent-hover); color: #fff !important; text-decoration: none; }
        .nav-more { position: relative; }
        .nav-more summary {
            list-style: none; cursor: pointer; color: var(--text-muted); font-weight: 500;
            font-size: 0.9375rem; padding: 0.375rem 0.75rem; border-radius: var(--radius-sm); user-select: none;
        }
        .nav-more summary::-webkit-details-marker { display: none; }
        .nav-more summary:hover, .nav-more[open] summary { background: var(--primary-light); color: var(--primary); }
        .nav-more-panel {
            position: absolute; right: 0; top: calc(100% + 6px); min-width: 170px; background: #fff;
            border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: var(--shadow-md);
            padding: 0.4rem; display: grid; gap: 0.1rem; z-index: 40;
        }
        .nav-more-panel a { display: block; padding: 0.5rem 0.7rem; border-radius: 8px; color: var(--text-main); }
        .nav-more-panel a:hover { background: var(--bg); text-decoration: none; }

        .hero {
            text-align: left;
            padding: 2.25rem 1.75rem 2rem;
            margin: 1rem 0 1.5rem;
            border-radius: var(--radius-lg);
            background:
                radial-gradient(1200px 400px at 10% -20%, rgba(249,115,22,.25), transparent 55%),
                radial-gradient(800px 360px at 90% 0%, rgba(37,99,235,.35), transparent 50%),
                linear-gradient(145deg, #1E3A8A 0%, #172554 100%);
            color: #fff;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .hero-layout { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(260px,0.9fr); gap: 1.5rem 2rem; align-items: center; }
        .hero-copy h1, .hero h1 { max-width: none; margin-bottom: 0.75rem; text-align: left; color: #fff; }
        .hero .hero-eyebrow {
            display: inline-flex; align-items: center; gap: 0.4rem;
            background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18);
            padding: 0.3rem 0.8rem; border-radius: 999px; font-size: 0.85rem;
            color: #BFDBFE; font-weight: 600; margin-bottom: 1rem;
        }
        .hero-lead { color: #E0E7FF; font-size: 1.05rem; max-width: 38rem; margin: 0 0 1.35rem; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.15rem; }
        .hero-actions .btn-secondary {
            background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.28);
            color: #fff !important; box-shadow: none;
        }
        .hero-actions .btn-secondary:hover { background: rgba(255,255,255,.2); color: #fff !important; }
        .hero-meta { display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; color: #C7D2FE; font-size: 0.9rem; }
        .hero-aside { min-width: 0; }
        .hero-card {
            background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18);
            backdrop-filter: blur(10px); border-radius: 18px; padding: 1.2rem; box-shadow: 0 12px 32px rgba(0,0,0,.18);
            text-align: left;
        }
        .hero-card-top { display: flex; justify-content: space-between; align-items: center; gap: .5rem; margin-bottom: .65rem; }
        .hero-card-tag { background: var(--accent); color: #fff; font-size: .72rem; font-weight: 800; padding: .22rem .55rem; border-radius: 999px; }
        .hero-card-sub { color: #C7D2FE; font-size: .8rem; font-weight: 600; }
        .hero-card h2 { color: #fff; font-size: 1.15rem; margin: 0 0 .35rem; display: block; }
        .hero-card h2::before { display: none; }
        .hero-card-price { display: flex; align-items: baseline; gap: .3rem; margin-bottom: .75rem; }
        .hero-card-price .amount { font-size: 2.1rem; font-weight: 800; color: #fff; letter-spacing: 0; }
        .hero-card-price .unit { color: #C7D2FE; font-weight: 600; }
        .hero-card-list { list-style: none; display: grid; gap: .4rem; margin: 0 0 1rem; color: #E0E7FF; font-size: .9rem; padding: 0; }
        .hero-card-list li { display: flex; align-items: center; gap: .45rem; }
        .hero-card-list li::before { content: "✓"; color: #86EFAC; font-weight: 800; }
        .hero-card .btn { width: 100%; }
        .hero-card-note { margin-top: .65rem; text-align: center; color: #C7D2FE; font-size: .8rem; }
        .hero-card-note a { color: #fff; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }

        .btn-outline { background: #fff; color: var(--primary) !important; border: 1px solid var(--border); box-shadow: none; }
        .btn-outline:hover { border-color: #BFDBFE; background: var(--primary-light); color: var(--primary) !important; }
        .btn-ghost { background: transparent; color: var(--text-muted) !important; border: 1px solid transparent; box-shadow: none; }
        .btn-ghost:hover { background: var(--bg); color: var(--text-main) !important; }
        .btn-block { width: 100%; }
        .btn-sm { padding: 0.55rem 0.9rem; font-size: 0.875rem; }
        .btn-lg { padding: 1rem 1.5rem; font-size: 1.05rem; }

        .promo {
            display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
            gap: 0.85rem 1rem; background: linear-gradient(90deg, #FFF7ED, #FFEDD5);
            border: 1px solid #FED7AA; border-radius: var(--radius-md); padding: 1rem 1.25rem; margin-bottom: 1.5rem;
        }
        .promo-left { display: flex; flex-wrap: wrap; align-items: center; gap: 0.65rem; color: #9A3412; font-weight: 600; }
        .promo code {
            background: #fff; border: 1px dashed #C2410C; color: #C2410C; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 1.15rem; letter-spacing: 0.06em; padding: 0.3rem 0.75rem; border-radius: 8px; font-weight: 800;
        }
        .promo-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
        .copy-btn.is-ok, .sticky-copy.is-ok { background: #F0FDF4 !important; color: #166534 !important; border-color: #BBF7D0 !important; }
        .copy-btn.is-err { background: #FEF2F2 !important; color: #991B1B !important; border-color: #FECACA !important; }

        .trust-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin-bottom: 1.75rem; }
        .trust-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1rem 1.1rem; box-shadow: var(--shadow-sm); }
        .trust-item strong { display: block; margin-bottom: 0.2rem; }
        .trust-item p { margin: 0; font-size: 0.85rem; }

        .section {
            background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
            padding: 1.5rem; margin-bottom: 1.25rem; box-shadow: var(--shadow-sm);
        }
        .section-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 0.75rem; margin-bottom: 1rem; }
        .section h2 { margin: 0; }
        .section-sub { color: var(--text-muted); font-size: 0.95rem; margin: 0 0 1rem; }

        .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.85rem; }
        .step { border: 1px solid var(--border); border-radius: var(--radius-md); padding: 1.1rem; background: linear-gradient(180deg,#fff,#F8FAFC); }
        .step-num { width: 28px; height: 28px; border-radius: 999px; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: .85rem; font-weight: 800; margin-bottom: .65rem; }
        .step h3 { font-size: 1rem; margin-bottom: .35rem; }
        .step p { color: var(--text-muted); font-size: .9rem; margin: 0; }

        .plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; align-items: stretch; }
        .plan-card {
            position: relative; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff;
            padding: 1.25rem; display: flex; flex-direction: column; gap: 0.75rem; transition: transform .15s, box-shadow .15s, border-color .15s;
        }
        .plan-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: #BFDBFE; }
        .plan-card.is-featured { border: 2px solid var(--accent); box-shadow: 0 12px 32px rgba(249,115,22,.15); transform: scale(1.02); z-index: 1; }
        .plan-card.is-featured:hover { transform: scale(1.02) translateY(-2px); }
        .plan-badge {
            position: absolute; top: -11px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff;
            font-size: .75rem; font-weight: 800; padding: .25rem .7rem; border-radius: 999px; white-space: nowrap;
        }
        .plan-label { display: inline-block; font-size: .75rem; font-weight: 700; color: var(--primary); background: var(--primary-light); border: 1px solid #DBEAFE; padding: .15rem .5rem; border-radius: 6px; width: fit-content; }
        .plan-card h3 { font-size: 1.1rem; line-height: 1.3; margin: 0; }
        .plan-price { display: flex; align-items: baseline; gap: .25rem; }
        .plan-price .amount { font-size: 2rem; font-weight: 800; letter-spacing: 0; }
        .plan-price .unit { color: var(--text-muted); font-weight: 600; }
        .plan-specs { display: grid; gap: .35rem; font-size: .9rem; color: var(--text-muted); }
        .plan-specs strong { color: var(--text-main); }
        .plan-actions { margin-top: auto; display: grid; gap: .45rem; }
        .plan-detail-link { text-align: center; font-size: .875rem; color: var(--text-muted); font-weight: 600; text-decoration: none !important; }
        .plan-detail-link:hover { color: #2563EB; }

        .selector { display: grid; gap: 1rem; }
        .selector-q h3 { font-size: .95rem; margin-bottom: .55rem; }
        .chip-row { display: flex; flex-wrap: wrap; gap: .5rem; }
        .chip {
            border: 1px solid var(--border); background: #fff; color: var(--text-main); padding: .5rem .85rem;
            border-radius: 999px; font-size: .9rem; font-weight: 600; cursor: pointer; min-height: 40px;
        }
        .chip:hover { border-color: #BFDBFE; background: var(--primary-light); }
        .chip.is-active { background: var(--primary); border-color: var(--primary); color: #fff; }
        .selector-result { display: none; border: 1px solid #BBF7D0; background: #F0FDF4; border-radius: var(--radius-md); padding: 1rem 1.15rem; }
        .selector-result.is-show { display: grid; }
        .selector-plans { display: grid; grid-template-columns: 1.2fr 1fr; gap: .75rem; }
        .selector-plan { background: #fff; border: 1px solid #BBF7D0; border-radius: var(--radius-md); padding: .9rem 1rem; }
        .selector-plan.is-alt { border-color: var(--border); background: #F8FAFC; }
        .selector-plan .result-actions { display: flex; flex-wrap: wrap; gap: .5rem; }

        .filters { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: 1rem; }
        .filter-btn {
            border: 1px solid var(--border); background: #fff; color: var(--text-muted); padding: .45rem .8rem;
            border-radius: 999px; font-size: .85rem; font-weight: 700; cursor: pointer; min-height: 36px;
        }
        .filter-btn.is-active, .filter-btn:hover { background: var(--primary-light); color: var(--primary); border-color: #BFDBFE; }
        .category-block { margin-bottom: 1.5rem; }
        .category-block h3 { font-size: 1.05rem; margin-bottom: .25rem; }
        .category-block > p { color: var(--text-muted); font-size: .9rem; margin-bottom: .85rem; }
        .product-card.is-popular { border-color: var(--accent); box-shadow: 0 8px 24px rgba(249,115,22,.12); }
        .product-top { padding: 1.1rem 1.1rem .75rem; background: #F8FAFC; border-bottom: 1px solid var(--border); position: relative; }
        .product-top h3 { font-size: 1rem; padding-right: 4.5rem; margin: 0; line-height: 1.35; }
        .product-tag {
            position: absolute; top: .85rem; right: .85rem; font-size: .72rem; font-weight: 800; color: #B45309;
            background: #FEF3C7; border: 1px solid #FDE68A; padding: .15rem .45rem; border-radius: 999px;
        }
        .product-card.is-popular .product-tag { color: #fff; background: var(--accent); border-color: var(--accent); }
        .product-body { padding: 1rem 1.1rem 1.15rem; display: flex; flex-direction: column; flex: 1; gap: .65rem; }
        .product-price .amount { font-size: 1.65rem; font-weight: 800; }
        .product-price .unit { color: var(--text-muted); font-weight: 600; font-size: .9rem; }
        .product-actions { display: grid; gap: .4rem; margin-top: .25rem; }
        .tags { display: flex; flex-wrap: wrap; gap: .35rem; }
        .product-card .product-desc { padding: 0; margin: 0; }

        .faq details { border: 1px solid var(--border); border-radius: var(--radius-sm); background: #fff; padding: .85rem 1rem; margin-bottom: .55rem; }
        .faq summary { cursor: pointer; font-weight: 700; list-style: none; }
        .faq summary::-webkit-details-marker { display: none; }
        .faq details[open] summary { margin-bottom: .45rem; color: var(--primary); }
        .faq details p { color: var(--text-muted); font-size: .95rem; margin: 0; }
        .content-list { list-style: none; display: grid; gap: .55rem; padding: 0; }
        .content-list li { padding-left: 1.2rem; position: relative; color: var(--text-muted); }
        .content-list li::before { content: ""; width: 7px; height: 7px; border-radius: 999px; background: var(--accent); position: absolute; left: 0; top: .55em; }
        .content-list strong { color: var(--text-main); }

        .final-cta {
            text-align: center; padding: 2rem 1.25rem; border-radius: var(--radius-lg);
            background: linear-gradient(145deg, #1E3A8A, #172554); color: #fff; margin: 1.5rem 0; box-shadow: var(--shadow-md);
        }
        .final-cta h2 { color: #fff; margin: 0 0 .5rem; justify-content: center; }
        .final-cta h2::before { display: none; }
        .final-cta p { color: #C7D2FE; margin-bottom: 1.1rem; }

        .mobile-sticky-cta {
            transform: translateY(110%); transition: transform .25s ease;
            padding: 0.7rem 0.9rem calc(0.7rem + env(safe-area-inset-bottom));
        }
        .mobile-sticky-cta.visible { transform: translateY(0); display: block; }
        .mobile-sticky-inner { display: grid; grid-template-columns: 1fr 1.4fr; gap: .55rem; width: min(1100px, 100%); margin: 0 auto; }
        .sticky-copy { background: #fff; border: 1px solid #FED7AA; color: #9A3412; font-weight: 700; width: 100%; }
        .mobile-sticky-cta .btn { width: 100%; }

        .buy-panel {
            border: 1px solid #FED7AA; background: linear-gradient(180deg, #FFF7ED, #fff);
            border-radius: var(--radius-md); padding: 1.25rem; display: grid; gap: 0.85rem; margin: 1rem 0;
        }
        .price-xl { font-size: 2.2rem; font-weight: 800; letter-spacing: 0; }

        .price-stack { display: grid; gap: 0.2rem; }
        .price-stack .price-original {
            color: var(--text-muted); font-size: 0.9rem; text-decoration: line-through;
        }
        .price-stack .price-now {
            display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.35rem 0.45rem;
        }
        .price-stack .price-now .amount {
            font-size: 1.55rem; font-weight: 800; color: #C2410C; letter-spacing: 0;
        }
        .price-stack-lg .price-now .amount { font-size: 2rem; }
        .price-stack .unit { font-size: 0.9rem; font-weight: 700; color: #9A3412; }
        .price-stack .price-tag {
            font-size: 0.72rem; font-weight: 800; color: #9A3412; background: #FFEDD5;
            border: 1px solid #FDBA74; border-radius: 999px; padding: 0.12rem 0.5rem;
        }
        .price-stack .price-note { font-size: 0.8rem; color: #9A3412; font-weight: 500; }

        /* 深色 Hero 卡片上的价格：高对比，避免橙字+深底糊成一团 */
        .price-stack-on-dark .price-original { color: rgba(226, 232, 240, 0.72); }
        .price-stack-on-dark .price-now .amount { color: #FFFFFF; text-shadow: 0 1px 2px rgba(0,0,0,.25); }
        .price-stack-on-dark .unit { color: #E0E7FF; font-weight: 700; }
        .price-stack-on-dark .price-tag {
            color: #1E3A8A; background: #FDE68A; border-color: #FBBF24;
        }
        .price-stack-on-dark .price-note { color: #C7D2FE; }
        .hero-card-price .price-stack { width: 100%; }
        .annual-hint {
            margin: 0.2rem 0 0.55rem; font-size: 0.82rem; color: var(--text-muted); font-weight: 600;
        }
        .hero-card .annual-hint { color: #C7D2FE; }
        .related-links { margin: 1.75rem 0 0.5rem; }
        .related-links h2 { margin-bottom: 0.75rem; }
        .related-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.45rem; }
        .related-list li a {
            display: block; padding: 0.65rem 0.85rem; border: 1px solid var(--border);
            border-radius: var(--radius-sm); background: #fff; color: var(--text-main); font-weight: 600;
        }
        .related-list li a:hover { border-color: #BFDBFE; background: var(--primary-light); text-decoration: none; }
        .checkout-hint {
            margin: 0.35rem 0 0; font-size: 0.88rem; color: var(--text-muted); line-height: 1.5;
        }
        .breadcrumb {
            display: flex; flex-wrap: wrap; align-items: center; gap: 0.35rem;
            font-size: 0.875rem; color: var(--text-muted); margin: 0.25rem 0 1rem;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .crumb-sep { opacity: 0.55; }
        .breadcrumb [aria-current="page"] { color: var(--text-main); font-weight: 600; }
        .compare-table-wrap { overflow-x: auto; margin: 1rem 0; }
        .compare-table { width: 100%; border-collapse: collapse; min-width: 640px; background: #fff; }
        .compare-table th, .compare-table td {
            border: 1px solid var(--border); padding: 0.75rem 0.85rem; text-align: left; vertical-align: top;
        }
        .compare-table th { background: var(--primary-light); color: var(--primary); font-size: 0.9rem; }
        .compare-table tr.is-featured { background: #FFF7ED; }
        .compare-table th:last-child, .compare-table td:last-child { min-width: 7.5rem; white-space: nowrap; }
        .compare-table .btn { min-height: 44px; padding: 0.55rem 0.9rem; font-size: 0.875rem; white-space: nowrap; }
        .guide-shot {
            border: 1px solid var(--border); border-radius: var(--radius-md); background: #F8FAFC;
            padding: 0; margin: 0.75rem 0 1.25rem; overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .guide-shot-img {
            display: block; width: 100%; height: auto; max-height: 420px; object-fit: cover; object-position: top;
            border-bottom: 1px solid var(--border); background: #fff;
        }
        .guide-shot figcaption {
            padding: 0.85rem 1.1rem 1rem; color: var(--text-muted); font-size: 0.92rem; line-height: 1.55;
        }
        .guide-shot strong { color: var(--text-main); display: block; margin-bottom: 0.25rem; }
        .copy-btn.is-ok, .sticky-copy.is-ok { background: #F0FDF4 !important; color: #166534 !important; border-color: #BBF7D0 !important; }
        .copy-btn.is-err { background: #FEF2F2 !important; color: #991B1B !important; border-color: #FECACA !important; }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                scroll-behavior: auto !important;
                transition-duration: 0.01ms !important;
            }
        }

        @media (max-width: 900px) {
            .hero-layout, .plan-grid, .steps, .trust-strip, .selector-plans { grid-template-columns: 1fr; }
            .plan-card.is-featured { transform: none; }
            .plan-card.is-featured:hover { transform: translateY(-2px); }
            .trust-strip { grid-template-columns: 1fr 1fr; }
            .hero-aside { max-width: 420px; }
        }
        @media (max-width: 720px) {
            .hero { padding: 1.75rem 1.15rem 1.5rem; }
            .hero-aside { max-width: none; }
            .trust-strip { grid-template-columns: 1fr; }
            .mobile-sticky-cta { display: block; }
            .promo { flex-direction: column; align-items: stretch; }
            .promo-actions .btn, .promo-actions .copy-btn { width: 100%; }
            .section { padding: 1.15rem; }
            .nav-conversion { justify-content: flex-start; overflow: visible; flex-wrap: wrap; }
            .nav-conversion .nav-cta { flex: 1 0 100%; text-align: center; }
            .nav-conversion .nav-more-panel { left: 0; right: auto; }
        }