/* roulang page: index */
:root {
            --brand: #E50914;
            --brand-dark: #B00710;
            --brand-soft: #fdecec;
            --dark: #101014;
            --dark-2: #1A1A2E;
            --surface: #FFFFFF;
            --bg: #F5F5F7;
            --ink: #212121;
            --ink-2: #5F5F6B;
            --line: #ECECEE;
            --success: #0F9D6B;
            --radius: 16px;
            --shadow-sm: 0 6px 18px rgba(0, 0, 0, .05);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, .12);
        }

        html {
            scroll-behavior: smooth;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            color: var(--ink);
            font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            font-size: 1rem;
            line-height: 1.8;
            background: #fff;
            overflow-x: hidden;
            padding-bottom: 84px;
        }

        img {
            max-width: 100%;
            height: auto;
        }

        a {
            text-decoration: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5 {
            color: var(--ink);
            line-height: 1.35;
        }

        .container {
            max-width: 1200px;
        }

        .btn {
            font-weight: 600;
            border-radius: 999px;
            transition: all .25s ease;
        }

        .btn-brand {
            background: var(--brand);
            border: 1px solid var(--brand);
            color: #fff;
            box-shadow: 0 6px 18px rgba(229, 9, 20, .25);
        }

        .btn-brand:hover,
        .btn-brand:focus {
            background: var(--brand-dark);
            border-color: var(--brand-dark);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(176, 7, 16, .28);
        }

        .btn-brand:active {
            transform: scale(.97);
        }

        .btn-outline-mid {
            border: 1px solid rgba(255, 255, 255, .35);
            color: #fff;
            background: transparent;
        }

        .btn-outline-mid:hover,
        .btn-outline-mid:focus {
            border-color: var(--brand);
            background: var(--brand);
            color: #fff;
        }

        .btn-ghost {
            background: #f5f1f1;
            color: var(--ink);
            border: 1px solid transparent;
        }

        .btn-ghost:hover {
            background: var(--brand-soft);
            border-color: var(--brand);
            color: var(--brand-dark);
        }

        .section {
            padding: clamp(4.5rem, 8vw, 6.5rem) 0;
        }

        .section-light {
            background: var(--bg);
        }

        .section-white {
            background: #fff;
        }

        .section-dark {
            background: var(--dark-2);
            color: rgba(255, 255, 255, .9);
        }

        .section-dark h2 {
            color: #fff;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            padding: .35rem 1rem;
            border-radius: 999px;
            background: var(--brand-soft);
            color: var(--brand-dark);
            font-size: .875rem;
            font-weight: 600;
            margin-bottom: .9rem;
        }

        .section-head h2 {
            margin-top: .2rem;
            font-weight: 700;
            font-size: clamp(1.75rem, 2.6vw, 2.45rem);
            letter-spacing: -.02em;
        }

        .section-head p {
            color: var(--ink-2);
            max-width: 760px;
            margin: 1rem auto 0;
        }

        /* 顶部导航 */
        .site-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1060;
            background: linear-gradient(180deg, rgba(16, 16, 20, .72), rgba(16, 16, 20, 0));
            padding: 1rem 0;
            transition: all .35s ease;
        }

        .site-navbar.scrolled {
            background: rgba(16, 16, 20, .96);
            padding: .7rem 0;
            box-shadow: 0 8px 24px rgba(0, 0, 0, .28);
            backdrop-filter: saturate(180%) blur(20px);
        }

        .site-navbar .navbar-brand {
            display: flex;
            align-items: center;
            font-weight: 800;
            color: #fff;
            font-size: 1.35rem;
            letter-spacing: .02em;
            margin-right: 2rem;
        }

        .brand-logo {
            display: inline-flex;
        }

        .brand-logo .brand-main {
            color: #fff;
        }

        .brand-stamp {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--brand);
            color: #fff;
            border-radius: 8px;
            font-weight: 800;
            margin-right: .35rem;
            min-width: 2.2rem;
            height: 2.2rem;
            padding: 0 .35rem;
            font-size: 1.15rem;
        }

        .site-navbar .nav-link {
            color: rgba(255, 255, 255, .92);
            font-weight: 500;
            font-size: 1rem;
            margin: 0 .35rem;
            position: relative;
            transition: color .2s;
        }

        .site-navbar .nav-link:hover,
        .site-navbar .nav-link.active {
            color: #fff;
        }

        .site-navbar .nav-link.active::after {
            content: "";
            display: block;
            height: 2px;
            width: 70%;
            margin: .2rem auto 0;
            background: var(--brand);
            border-radius: 999px;
        }

        .site-navbar .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 12px;
            color: #fff;
            padding: .25rem .6rem;
        }

        .site-navbar .navbar-toggler:focus {
            box-shadow: 0 0 0 .2rem rgba(229, 9, 20, .4);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='white' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            background: var(--dark);
            color: #fff;
            padding: 7rem 0 5rem;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-position: center;
            background-size: cover;
            transform: scale(1.03);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(0, 0, 0, .88) 0%, rgba(16, 16, 20, .72) 52%, rgba(26, 26, 46, .45) 100%);
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            color: #ffc7c7;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .12);
            padding: .4rem 1.05rem;
            border-radius: 999px;
            font-size: .9rem;
            letter-spacing: .04em;
            margin-bottom: 1.25rem;
        }

        .hero h1 {
            color: #fff;
            font-size: clamp(2.1rem, 4vw, 3.35rem);
            font-weight: 800;
            line-height: 1.18;
            max-width: 640px;
            margin-bottom: 1.4rem;
            letter-spacing: -.02em;
        }

        .hero h1 span {
            color: #fff;
            background: linear-gradient(90deg, #fff 80%, #E50914 120%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-lead {
            color: rgba(255, 255, 255, .88);
            font-size: 1.075rem;
            max-width: 760px;
            margin-bottom: 2.4rem;
            line-height: 1.85;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .hero-actions .btn {
            padding: .8rem 1.8rem;
            font-size: 1.05rem;
        }

        /* 手册速览卡 */
        .guide-card {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .16);
            border-radius: 24px;
            backdrop-filter: blur(8px);
            overflow: hidden;
            box-shadow: 0 26px 60px rgba(0, 0, 0, .28);
        }

        .guide-cover img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid rgba(255, 255, 255, .14);
        }

        .guide-body {
            padding: 1.5rem 1.6rem 1.7rem;
            color: #fff;
        }

        .guide-body .guide-label {
            font-size: .8rem;
            letter-spacing: .1em;
            color: #ff9a9a;
            text-transform: uppercase;
        }

        .guide-body h3 {
            color: #fff;
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: .9rem;
            margin-top: .1rem;
        }

        .guide-body ul {
            list-style: none;
            margin: 0 0 1.4rem;
            padding: 0;
            font-size: .95rem;
            line-height: 2;
        }

        .guide-body ul i {
            color: #E50914;
            width: 1.2rem;
            margin-right: .35rem;
        }

        .guide-short-btn {
            border-radius: 999px;
            background: #fff;
            color: #101014;
            font-weight: 700;
            padding: .7rem 1.5rem;
            display: inline-block;
            font-size: .98rem;
            transition: all .25s ease;
        }

        .guide-short-btn:hover {
            background: #E50914;
            color: #fff;
            transform: translateY(-2px);
        }

        /* Pill 分类导航 */
        .pill-nav-section {
            background: #fff;
            padding: 1.2rem 0;
            border-bottom: 1px solid var(--line);
            position: relative;
            z-index: 5;
        }

        .pill-nav-label {
            font-size: .9rem;
            font-weight: 700;
            color: var(--ink);
            margin-right: 1.1rem;
            white-space: nowrap;
        }

        .pill-scroll {
            display: flex;
            align-items: center;
            gap: .55rem;
            overflow-x: auto;
            scrollbar-width: none;
            padding-bottom: .3rem;
        }

        .pill-scroll::-webkit-scrollbar {
            display: none;
        }

        .pill {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            white-space: nowrap;
            padding: .45rem 1.35rem;
            font-weight: 600;
            border-radius: 999px;
            background: #f1f1f4;
            color: var(--ink-2);
            border: 1px solid transparent;
            transition: all .25s ease;
            font-size: .95rem;
        }

        .pill:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: #fff7f7;
        }

        .pill.active {
            background: var(--brand);
            color: #fff;
            border-color: var(--brand);
            box-shadow: 0 6px 16px rgba(229, 9, 20, .22);
        }

        /* 卖点三连 */
        .feature-card {
            height: 100%;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            padding: 0;
            transition: transform .3s ease, box-shadow .3s ease;
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .feature-cover {
            position: relative;
            aspect-ratio: 16 / 8;
            overflow: hidden;
            background: #e8e8ec;
        }

        .feature-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feature-cover .icon-circle {
            position: absolute;
            left: 1rem;
            bottom: -20px;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            background: var(--brand);
            color: #fff;
            border: 4px solid #fff;
        }

        .feature-body {
            padding: 2.2rem 1.5rem 1.5rem;
        }

        .feature-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: .6rem;
        }

        .feature-body p {
            color: var(--ink-2);
            margin-bottom: 0;
            font-size: .98rem;
        }

        /* 场景演示 */
        .showcase-img {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            min-height: 360px;
            height: 100%;
            box-shadow: 0 30px 80px rgba(0, 0, 0, .35);
        }

        .showcase-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .showcase-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(16, 16, 20, .65), rgba(16, 16, 20, .05));
        }

        .showcase-img .showcase-mark {
            position: absolute;
            z-index: 2;
            right: 1.25rem;
            top: 1.25rem;
            background: rgba(229, 9, 20, .9);
            color: #fff;
            border-radius: 999px;
            padding: .3rem .8rem;
            font-size: .85rem;
            font-weight: 700;
            backdrop-filter: blur(4px);
        }

        .step-list {
            list-style: none;
            margin: 1.8rem 0 2.2rem;
            padding: 0;
        }

        .step-item {
            display: flex;
            gap: 1.35rem;
            margin-bottom: 1.6rem;
        }

        .step-item .num {
            flex: 0 0 auto;
            width: 42px;
            height: 42px;
            border-radius: 13px;
            background: rgba(229, 9, 20, .12);
            border: 1px solid rgba(229, 9, 20, .35);
            color: #ffb3b7;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.05rem;
        }

        .step-item h3 {
            color: #fff;
            font-size: 1.08rem;
            margin-bottom: .2rem;
            font-weight: 700;
        }

        .step-item p {
            color: rgba(255, 255, 255, .72);
            margin: 0;
            font-size: .95rem;
            line-height: 1.8;
        }

        /* 社会认同 */
        .proof-note {
            background: var(--brand);
            border-radius: 20px;
            color: #fff;
            padding: 1.6rem 2rem;
            display: flex;
            align-items: center;
            gap: 1.2rem;
            flex-wrap: wrap;
        }

        .proof-note i {
            font-size: 1.8rem;
        }

        .proof-note p {
            margin: 0;
            font-size: 1.05rem;
        }

        .quote-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 18px;
            padding: 1.5rem 1.6rem;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: all .25s;
        }

        .quote-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .quote-card .quote-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #f1eef1;
            color: var(--brand);
            font-weight: 800;
            margin-bottom: .75rem;
        }

        .quote-card .quote-role {
            font-size: .88rem;
            color: var(--ink-2);
            margin-bottom: .5rem;
        }

        .quote-card p {
            color: var(--ink-2);
            margin: 0;
            font-size: .95rem;
        }

        /* 资讯列表 */
        .news-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .news-list li {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 1rem;
            border-bottom: 1px solid var(--line);
            padding: 1.05rem 0;
        }

        .news-list li:last-child {
            border-bottom: 0;
        }

        .news-list a {
            color: var(--ink);
            font-weight: 500;
            transition: color .2s ease;
            flex: 1;
            font-size: 1rem;
        }

        .news-list a:hover {
            color: var(--brand);
        }

        .news-list .news-date {
            color: #999;
            font-size: .875rem;
            white-space: nowrap;
            font-weight: 400;
            margin-left: 1rem;
        }

        .news-list .news-type {
            display: inline-block;
            background: var(--brand-soft);
            color: var(--brand-dark);
            font-size: .8rem;
            margin-right: .7rem;
            padding: .12rem .7rem;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .side-recommend-card {
            background: var(--dark-2);
            border-radius: 20px;
            overflow: hidden;
            margin-bottom: 1.5rem;
        }

        .side-recommend-card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
        }

        .side-recommend-body {
            padding: 1.3rem;
            color: #fff;
        }

        .side-recommend-body h3 {
            color: #fff;
            font-size: 1.18rem;
            font-weight: 700;
        }

        .side-recommend-body p {
            color: rgba(255, 255, 255, .75);
            font-size: .95rem;
            margin-bottom: 1rem;
        }

        .side-link {
            color: #fecaca;
            font-weight: 600;
        }

        .side-link:hover {
            color: #fff;
        }

        /* FAQ */
        .accordion {
            --bs-accordion-bg: #fff;
            --bs-accordion-border-width: 1px;
            --bs-accordion-border-color: var(--line);
            --bs-accordion-active-bg: #fff7f7;
            --bs-accordion-active-color: var(--brand);
            border-radius: 18px;
        }

        .accordion-button {
            font-weight: 700;
            color: var(--ink);
            border-radius: 16px !important;
            padding: 1.15rem 1.4rem;
            font-size: 1rem;
            box-shadow: none;
            background: #fff;
        }

        .accordion-button:not(.collapsed) {
            background: #fff7f7;
            color: var(--brand-dark);
            box-shadow: none;
            border-left: 4px solid var(--brand);
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 .25rem rgba(229, 9, 20, .12);
        }

        .accordion-body {
            padding: 1rem 1.4rem 1.4rem;
            color: var(--ink-2);
            line-height: 1.8;
        }

        /* CTA */
        .cta-final {
            position: relative;
            padding: 6.5rem 0;
            background-image: url('/assets/images/backpic/back-4.jpg');
            background-position: center;
            background-size: cover;
            background-color: var(--dark);
        }

        .cta-final .cta-mask {
            position: absolute;
            inset: 0;
            background: rgba(16, 16, 20, .74);
        }

        .cta-final .container {
            position: relative;
            z-index: 2;
        }

        .cta-final h2 {
            color: #fff;
            font-size: clamp(1.8rem, 3vw, 2.6rem);
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .cta-final p {
            color: rgba(255, 255, 255, .82);
            max-width: 640px;
            margin: 0 auto 2rem;
            font-size: 1.05rem;
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .75);
            padding: 3.5rem 0 1.5rem;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: .5rem;
        }

        .site-footer .footer-links a {
            color: rgba(255, 255, 255, .72);
            transition: color .2s ease;
        }

        .site-footer .footer-links a:hover {
            color: #E50914;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            font-weight: 800;
            color: #fff;
            font-size: 1.35rem;
            margin-bottom: .75rem;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin: 2.5rem 0 0;
            padding-top: 1.5rem;
        }

        .footer-copyright {
            font-size: .9rem;
            color: rgba(255, 255, 255, .58);
        }

        .footer-legal {
            font-size: .85rem;
            color: rgba(255, 255, 255, .4);
            margin-top: .4rem;
            line-height: 1.7;
        }

        /* 浮动转化条 */
        .floating-cta {
            position: fixed;
            right: 18px;
            left: 18px;
            bottom: 14px;
            z-index: 1040;
            background: rgba(16, 16, 20, .98);
            border: 1px solid rgba(229, 9, 20, .6);
            color: #fff;
            border-radius: 999px;
            padding: .6rem .8rem .6rem 1.6rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: .8rem;
            box-shadow: 0 20px 50px rgba(0, 0, 0, .35);
            backdrop-filter: blur(12px);
            font-size: .95rem;
            animation: floatUp .4s ease both;
        }

        .floating-cta .btn {
            flex-shrink: 0;
            padding: .55rem 1.35rem;
            font-size: .95rem;
        }

        @keyframes floatUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @media (min-width: 992px) {
            .floating-cta {
                width: auto;
                max-width: 820px;
                left: 50%;
                right: auto;
                transform: translateX(-50%);
                bottom: 24px;
                border-radius: 999px;
                padding: .7rem 1rem .7rem 2rem;
            }
        }

        @media (max-width: 991.98px) {
            .site-navbar .navbar-collapse {
                background: rgba(16, 16, 20, .98);
                border-radius: 18px;
                padding: 1rem;
                margin-top: .7rem;
                box-shadow: 0 18px 40px rgba(0, 0, 0, .3);
            }

            .site-navbar .navbar-nav .nav-link.active::after {
                margin: .2rem 0 0;
                width: 2.2rem;
            }

            .hero {
                padding-top: 6.5rem;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .guide-card {
                max-width: 560px;
            }

            .step-list {
                margin-top: 2rem;
            }
        }

        @media (max-width: 767.98px) {
            body {
                padding-bottom: 76px;
            }

            .section {
                padding: 3.5rem 0;
            }

            .pill-nav-section .container {
                max-width: 100%;
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .pill-nav-label {
                display: none;
            }

            .news-list li {
                flex-direction: column;
                gap: .2rem;
                padding: .9rem 0;
            }

            .news-list .news-date {
                margin-left: 0;
            }

            .floating-cta {
                font-size: .9rem;
                padding-left: 1.2rem;
            }

            .floating-cta .btn {
                padding: .45rem 1.15rem;
                font-size: .9rem;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.75rem;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }

            .guide-body {
                padding: 1.2rem;
            }

            .showcase-img {
                min-height: 240px;
            }

            .footer-divider .d-flex {
                flex-direction: column;
            }
        }

/* roulang page: category1 */
:root {
            --brand: #E50914;
            --brand-dark: #B00710;
            --brand-soft: #fdecec;
            --dark: #101014;
            --dark-2: #1A1A2E;
            --surface: #FFFFFF;
            --bg: #F5F5F7;
            --ink: #212121;
            --ink-2: #5F5F6B;
            --line: #ECECEE;
            --success: #0F9D6B;
            --radius: 16px;
            --shadow-sm: 0 6px 18px rgba(0, 0, 0, .05);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, .12);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            color: var(--ink);
            font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            font-size: 1rem;
            line-height: 1.8;
            background: #fff;
            overflow-x: hidden;
            padding-bottom: 0;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        a {
            text-decoration: none;
        }
        .container {
            max-width: 1200px;
        }
        .btn {
            font-weight: 600;
            border-radius: 999px;
            transition: all .25s ease;
            outline: none;
        }
        .btn:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 2px;
        }
        .btn-brand {
            background: var(--brand);
            border: 1px solid var(--brand);
            color: #fff;
            box-shadow: 0 6px 18px rgba(229, 9, 20, .25);
        }
        .btn-brand:hover,
        .btn-brand:focus {
            background: var(--brand-dark);
            border-color: var(--brand-dark);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(176, 7, 16, .28);
        }
        .btn-brand:active {
            transform: scale(.97);
        }
        .btn-outline-mid {
            border: 1px solid rgba(255, 255, 255, .45);
            color: #fff;
            background: transparent;
        }
        .btn-outline-mid:hover,
        .btn-outline-mid:focus {
            border-color: var(--brand);
            background: var(--brand);
            color: #fff;
        }
        .btn-ghost {
            background: #f5f1f1;
            color: var(--ink);
            border: 1px solid transparent;
        }
        .btn-ghost:hover {
            background: var(--brand-soft);
            border-color: var(--brand);
            color: var(--brand-dark);
        }
        .section {
            padding: clamp(3.5rem, 6vw, 5.5rem) 0;
        }
        .section-light {
            background: var(--bg);
        }
        .section-dark {
            background: var(--dark-2);
            color: rgba(255, 255, 255, .9);
        }
        .section-dark h2 {
            color: #fff;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            padding: .35rem 1rem;
            border-radius: 999px;
            background: var(--brand-soft);
            color: var(--brand-dark);
            font-size: .875rem;
            font-weight: 600;
            margin-bottom: .9rem;
        }
        .section-head h2 {
            margin-top: .2rem;
            font-weight: 700;
            font-size: clamp(1.75rem, 2.6vw, 2.45rem);
            letter-spacing: -.02em;
            line-height: 1.3;
        }
        .section-head p {
            color: var(--ink-2);
            max-width: 760px;
            margin: 1rem auto 0;
        }
        /* 顶部导航 */
        .site-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1060;
            background: rgba(16, 16, 20, .52);
            padding: 1rem 0;
            transition: all .35s ease;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }
        .site-navbar.scrolled {
            background: rgba(16, 16, 20, .96);
            padding: .7rem 0;
            box-shadow: 0 8px 24px rgba(0, 0, 0, .28);
            backdrop-filter: saturate(180%) blur(20px);
        }
        .site-navbar .navbar-brand {
            display: flex;
            align-items: center;
            font-weight: 800;
            color: #fff;
            font-size: 1.35rem;
            letter-spacing: .02em;
            margin-right: 2rem;
        }
        .brand-logo {
            display: inline-flex;
        }
        .brand-logo .brand-main {
            color: #fff;
        }
        .brand-stamp {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--brand);
            color: #fff;
            border-radius: 8px;
            font-weight: 800;
            margin-right: .35rem;
            min-width: 2.2rem;
            height: 2.2rem;
            padding: 0 .35rem;
            font-size: 1.15rem;
        }
        .site-navbar .nav-link {
            color: rgba(255, 255, 255, .92);
            font-weight: 500;
            font-size: 1rem;
            margin: 0 .35rem;
            position: relative;
            transition: color .2s;
        }
        .site-navbar .nav-link:hover,
        .site-navbar .nav-link.active {
            color: #fff;
        }
        .site-navbar .nav-link.active::after {
            content: "";
            display: block;
            height: 2px;
            width: 70%;
            margin: .2rem auto 0;
            background: var(--brand);
            border-radius: 999px;
        }
        .site-navbar .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 12px;
            padding: .25rem .6rem;
        }
        .site-navbar .navbar-toggler:focus {
            box-shadow: 0 0 0 .2rem rgba(229, 9, 20, .4);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='white' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        @media (max-width: 991.98px) {
            .site-navbar {
                background: rgba(16, 16, 20, .96);
                padding: .7rem 0;
            }
            .site-navbar .navbar-collapse {
                background: var(--dark-2);
                margin-top: 1rem;
                border-radius: 16px;
                padding: 1rem 1.2rem;
                border: 1px solid rgba(255, 255, 255, .1);
            }
            .site-navbar .nav-link {
                padding: .6rem 0;
                border-bottom: 1px solid rgba(255, 255, 255, .06);
            }
            .site-navbar .navbar-nav .btn {
                width: 100%;
            }
        }
        /* 次级页头 */
        .category-hero {
            position: relative;
            background: var(--dark);
            color: #fff;
            padding: 8.5rem 0 4.8rem;
            overflow: hidden;
        }
        .category-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-position: center 28%;
            background-size: cover;
        }
        .category-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(10, 10, 14, .94) 10%, rgba(16, 16, 20, .72) 55%, rgba(16, 16, 20, .5) 100%);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .cat-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: .45rem;
            padding: .35rem 1rem;
            background: rgba(229, 9, 20, .22);
            border: 1px solid rgba(229, 9, 20, .45);
            color: #ffb3b6;
            border-radius: 999px;
            font-size: .875rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
        }
        .category-hero h1 {
            font-size: clamp(1.85rem, 3.2vw, 2.65rem);
            font-weight: 700;
            letter-spacing: -.02em;
            line-height: 1.25;
            margin: 0 0 1rem;
            color: #fff;
        }
        .category-hero .lead {
            color: rgba(255, 255, 255, .82);
            font-size: 1.0625rem;
            max-width: 680px;
            line-height: 1.9;
            margin-bottom: 0;
        }
        .category-hero-actions .btn {
            min-width: 140px;
        }
        /* 子分类筛选条 */
        .subnav-panel {
            border-bottom: 1px solid var(--line);
            background: #fff;
            position: relative;
            z-index: 20;
        }
        .subnav-scroll {
            display: flex;
            flex-wrap: nowrap;
            gap: .6rem;
            overflow-x: auto;
            padding: .85rem 0;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .subnav-scroll::-webkit-scrollbar {
            display: none;
        }
        .subnav-scroll .subnav-btn {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            white-space: nowrap;
            background: var(--bg);
            border: 1px solid transparent;
            color: var(--ink-2);
            font-weight: 500;
            font-size: .9375rem;
            padding: .5rem 1.3rem;
            border-radius: 999px;
            transition: all .2s ease;
        }
        .subnav-scroll .subnav-btn i {
            font-size: .875rem;
            color: var(--brand);
        }
        .subnav-scroll .subnav-btn:hover {
            border-color: var(--brand);
            color: var(--brand-dark);
            background: var(--brand-soft);
        }
        .subnav-scroll .subnav-btn.active {
            background: var(--brand);
            border-color: var(--brand);
            color: #fff;
            box-shadow: 0 6px 14px rgba(229, 9, 20, .22);
        }
        .subnav-scroll .subnav-btn.active i {
            color: #fff;
        }
        /* 内容宫格 */
        .library-grid-item {
            border-radius: var(--radius);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .library-grid-item:hover {
            transform: translateY(-6px);
            box-shadow: 0 18px 40px rgba(0, 0, 0, .13);
            border-color: rgba(229, 9, 20, .18);
        }
        .library-grid-item .card-top {
            position: relative;
            overflow: hidden;
            background: var(--dark-2);
            aspect-ratio: 4 / 3;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .library-grid-item .card-top img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
            display: block;
        }
        .library-grid-item:hover .card-top img {
            transform: scale(1.05);
        }
        .card-ribbon {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 3;
            background: var(--brand);
            color: #fff;
            font-size: .75rem;
            font-weight: 600;
            padding: .18rem .7rem;
            border-radius: 999px;
            letter-spacing: .02em;
        }
        .card-ribbon.hot {
            background: #FFBF00;
            color: #1a1a1a;
        }
        .card-body {
            padding: 1.3rem 1.3rem 1.4rem;
            display: flex;
            flex-direction: column;
            flex: 1;
            gap: .5rem;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin: 0;
            line-height: 1.4;
        }
        .card-body .card-desc {
            color: var(--ink-2);
            font-size: .925rem;
            line-height: 1.7;
            margin: 0;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-meta-tags {
            display: flex;
            flex-wrap: wrap;
            gap: .4rem;
            margin-top: .35rem;
        }
        .card-meta-tags .tag {
            background: var(--bg);
            border-radius: 999px;
            color: var(--ink-2);
            font-size: .8125rem;
            padding: .2rem .8rem;
            font-weight: 500;
            transition: all .2s;
        }
        .card-meta-tags .tag:hover {
            background: var(--brand-soft);
            color: var(--brand-dark);
        }
        /* 横向宽条 */
        .highlight-lane {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
            height: 100%;
        }
        .highlight-lane:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .highlight-lane .lane-num {
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--dark-2);
            color: rgba(255, 255, 255, .9);
            font-size: 1.9rem;
            font-weight: 800;
            min-width: 72px;
            font-style: italic;
            letter-spacing: -.04em;
        }
        @media (min-width: 992px) {
            .highlight-lane .lane-num {
                min-height: 150px;
            }
        }
        .highlight-lane .lane-content {
            padding: 1.3rem 1.4rem;
        }
        .highlight-lane .lane-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: .3rem;
        }
        .highlight-lane .lane-content p {
            color: var(--ink-2);
            margin: 0;
            font-size: .9375rem;
            line-height: 1.75;
        }
        .lane-tag {
            display: inline-flex;
            align-items: center;
            background: var(--brand-soft);
            color: var(--brand-dark);
            font-size: .875rem;
            font-weight: 600;
            border-radius: 999px;
            padding: .2rem .85rem;
            margin-bottom: .65rem;
        }
        /* 详述图文区 */
        .split-intro-image {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            min-height: 340px;
            background: var(--dark-2);
            box-shadow: var(--shadow-lg);
        }
        .split-intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .split-intro-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(15deg, rgba(16, 16, 20, .78), transparent 58%);
        }
        .split-badge {
            position: absolute;
            left: 1.2rem;
            bottom: 1.2rem;
            z-index: 3;
            color: #fff;
            font-weight: 700;
            font-size: 1.15rem;
            line-height: 1.4;
        }
        .split-badge small {
            display: block;
            color: rgba(255, 255, 255, .75);
            font-weight: 400;
            font-size: .875rem;
        }
        .split-points {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-bottom: 1.6rem;
        }
        .split-point {
            display: flex;
            gap: .85rem;
            align-items: flex-start;
        }
        .split-point .point-ic {
            flex: 0 0 auto;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-soft);
            color: var(--brand);
            font-size: 1rem;
        }
        .split-point h4 {
            font-size: 1.0625rem;
            font-weight: 700;
            margin: 0 0 .25rem;
            line-height: 1.4;
        }
        .split-point p {
            color: var(--ink-2);
            font-size: .9375rem;
            margin: 0;
            line-height: 1.7;
        }
        .split-list .point-ic {
            background: #eef8f4;
            color: var(--success);
        }
        /* 推荐宽卡 */
        .relate-card {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 1.4rem;
            transition: all .3s ease;
            box-shadow: var(--shadow-sm);
            height: 100%;
        }
        .relate-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(229, 9, 20, .18);
        }
        .relate-card .icon-block {
            flex: 0 0 auto;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--dark-2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.35rem;
            transition: all .3s ease;
        }
        .relate-card:hover .icon-block {
            background: var(--brand);
            transform: rotate(-4deg) scale(1.05);
        }
        .relate-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: .2rem;
        }
        .relate-card p {
            color: var(--ink-2);
            margin: 0;
            font-size: .9rem;
            line-height: 1.6;
        }
        .relate-card .arrow-icon {
            color: var(--brand);
            font-size: 1.1rem;
            transition: all .25s ease;
            flex: 0 0 auto;
        }
        .relate-card:hover .arrow-icon {
            transform: translateX(5px);
        }
        /* FAQ */
        .faq-panel {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 1rem 1.3rem;
            transition: all .25s ease;
        }
        .faq-panel[open] {
            box-shadow: var(--shadow-sm);
            border-color: rgba(229, 9, 20, .15);
        }
        .faq-panel summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            font-weight: 600;
            font-size: 1.05rem;
            padding: .2rem 0;
            line-height: 1.6;
        }
        .faq-panel summary::-webkit-details-marker {
            display: none;
        }
        .faq-panel summary i {
            color: var(--brand);
            font-size: .9rem;
            transition: transform .3s ease;
            flex: 0 0 auto;
        }
        .faq-panel[open] summary i {
            transform: rotate(180deg);
        }
        .faq-panel .faq-answer {
            color: var(--ink-2);
            padding-top: .3rem;
            padding-bottom: .3rem;
            border-top: 1px solid var(--line);
            margin-top: .2rem;
            font-size: .9625rem;
            line-height: 1.85;
        }
        .faq-panel .faq-answer p {
            margin: .75rem 0 0;
        }
        /* CTA */
        .cta-panel {
            border-radius: 24px;
            overflow: hidden;
            position: relative;
            background: var(--dark-2);
            padding: clamp(2.4rem, 5vw, 4rem);
            color: #fff;
            text-align: center;
        }
        .cta-panel-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
        }
        .cta-panel-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(26, 26, 46, .72) 20%, rgba(16, 16, 20, .93) 80%);
        }
        .cta-panel .container {
            position: relative;
            z-index: 2;
        }
        .cta-panel h2 {
            font-size: clamp(1.6rem, 2.6vw, 2.25rem);
            font-weight: 700;
            color: #fff;
        }
        .cta-panel p {
            color: rgba(255, 255, 255, .8);
            max-width: 640px;
            margin: 1rem auto 2rem;
        }
        /* 页脚 */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .85);
            padding: clamp(3rem, 6vw, 5rem) 0 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            font-weight: 800;
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }
        .site-footer .footer-brand .brand-stamp {
            margin-right: .45rem;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .site-footer p {
            line-height: 1.85;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: .6rem;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .65);
            transition: all .2s ease;
            line-height: 1.7;
        }
        .footer-links a:hover {
            color: var(--brand);
            padding-left: 4px;
        }
        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, .1);
            margin-top: clamp(2rem, 4vw, 3rem);
            padding: 1.5rem 0;
        }
        .footer-copyright {
            color: rgba(255, 255, 255, .55);
            font-size: .9rem;
        }
        .footer-domain {
            color: rgba(255, 255, 255, .45);
        }
        .footer-legal {
            color: rgba(255, 255, 255, .45);
            font-size: .85rem;
            text-align: right;
            line-height: 1.6;
        }
        @media (max-width: 767.98px) {
            .footer-legal {
                text-align: left;
            }
            .category-hero {
                padding: 7.2rem 0 3.5rem;
            }
            .split-intro-image {
                min-height: 240px;
            }
            .relate-card {
                align-items: flex-start;
            }
        }
        @media (min-width: 768px) {
            .split-intro-area {
                padding-right: 2rem;
            }
        }
        /* 返回顶部 */
        .back-top-btn {
            display: none;
            position: fixed;
            right: 1.25rem;
            bottom: 1.25rem;
            z-index: 1020;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            border: none;
            background: var(--dark-2);
            color: #fff;
            font-size: 1rem;
            box-shadow: var(--shadow-lg);
            transition: all .25s ease;
            align-items: center;
            justify-content: center;
        }
        .back-top-btn:hover {
            background: var(--brand);
            transform: translateY(-3px);
        }
        .back-top-btn.show {
            display: inline-flex;
        }
        @media (max-width: 767.98px) {
            .back-top-btn {
                bottom: 1rem;
                right: 1rem;
                width: 40px;
                height: 40px;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}