/* roulang page: index */
:root {
            --bg-canvas: #F5F5F1;
            --bg-surface: #FFFFFF;
            --bg-night: #101411;
            --bg-night2: #181D19;
            --text-ink: #161916;
            --text-sub: #626861;
            --border-line: #E4E6E1;
            --accent: #FF4D00;
            --accent-hover: #E64400;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg-canvas);
            color: var(--text-ink);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
            background: none;
            border: 0;
            cursor: pointer;
            padding: 0;
        }

        input,
        textarea {
            font-family: inherit;
            width: 100%;
            outline: none;
            border: 1px solid var(--border-line);
            background: #fff;
            border-radius: 10px;
            padding: 12px 14px;
            font-size: 15px;
            color: var(--text-ink);
            transition: border-color .2s cubic-bezier(.2, .7, .2, 1), box-shadow .2s;
        }

        textarea {
            min-height: 110px;
            resize: vertical;
        }

        input:focus,
        textarea:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(255, 77, 0, .12);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section {
            padding-top: clamp(64px, 8vw, 112px);
            padding-bottom: clamp(64px, 8vw, 112px);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .08em;
            color: var(--accent);
            text-transform: uppercase;
        }

        .section-tag::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--accent);
            display: inline-block;
        }

        h1,
        h2,
        h3,
        h4 {
            margin: 0;
            line-height: 1.25;
        }

        h1 {
            font-size: clamp(40px, 6vw, 68px);
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: clamp(26px, 3.6vw, 44px);
            font-weight: 700;
            line-height: 1.2;
        }

        .header-shell {
            position: sticky;
            top: 12px;
            z-index: 50;
        }

        .nav-panel {
            background: rgba(16, 20, 17, .92);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 18px;
            min-height: 74px;
            padding: 12px 18px;
            display: flex;
            align-items: center;
            gap: 16px;
            box-shadow: 0 8px 30px rgba(16, 20, 17, .08);
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            line-height: 1.2;
            white-space: nowrap;
        }

        .brand-mark {
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            border-radius: 12px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            transition: transform .2s cubic-bezier(.2, .7, .2, 1);
        }

        .brand:hover .brand-mark {
            transform: rotate(-6deg) scale(1.03);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
            margin-right: 8px;
        }

        .nav-link {
            color: rgba(255, 255, 255, .72);
            font-size: 15px;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: background .2s cubic-bezier(.2, .7, .2, 1), color .2s;
            position: relative;
        }

        .nav-link:hover {
            background: rgba(255, 255, 255, .1);
            color: #fff;
        }

        .nav-link.active {
            background: rgba(255, 255, 255, .12);
            color: var(--accent);
        }

        .nav-link.active::after {
            content: "";
            width: 4px;
            height: 4px;
            border-radius: 999px;
            background: var(--accent);
            position: absolute;
            bottom: 5px;
            left: 50%;
            transform: translateX(-50%);
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 11px 18px;
            border-radius: 10px;
            transition: background .2s cubic-bezier(.2, .7, .2, 1), transform .2s, box-shadow .2s;
            white-space: nowrap;
        }

        .cta-btn i {
            transition: transform .2s cubic-bezier(.2, .7, .2, 1);
        }

        .cta-btn:hover {
            background: var(--accent-hover);
            box-shadow: 0 8px 22px rgba(255, 77, 0, .28);
        }

        .cta-btn:hover i {
            transform: translateX(4px);
        }

        .cta-btn:active {
            transform: scale(.98);
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .15);
            font-size: 20px;
            transition: background .2s;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, .08);
        }

        .mobile-menu-panel {
            display: none;
            background: var(--bg-night);
            border-radius: 16px;
            margin-top: 8px;
            padding: 12px;
            border: 1px solid rgba(255, 255, 255, .08);
        }

        .mobile-menu-panel.open {
            display: block;
        }

        .mobile-menu-panel a {
            display: flex;
            align-items: center;
            min-height: 48px;
            padding: 0 16px;
            color: rgba(255, 255, 255, .86);
            border-radius: 10px;
            font-size: 16px;
            gap: 10px;
        }

        .mobile-menu-panel a:hover {
            background: rgba(255, 255, 255, .08);
            color: #fff;
        }

        .mobile-menu-panel a.active-mobile {
            color: var(--accent);
            font-weight: 600;
        }

        .hero-banner {
            background-size: cover;
            background-position: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(16, 20, 17, .94) 0%, rgba(16, 20, 17, .85) 45%, rgba(16, 20, 17, .45) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: minmax(0, 1fr);
            gap: 40px;
            align-items: center;
            padding: 88px 0;
            min-height: 720px;
        }

        .hero-subtitle {
            margin: 22px 0 0;
            max-width: 560px;
            color: rgba(255, 255, 255, .75);
            font-size: 17px;
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 34px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 24px;
            border-radius: 10px;
            transition: all .2s cubic-bezier(.2, .7, .2, 1);
            box-shadow: 0 8px 26px rgba(255, 77, 0, .22);
        }

        .btn-primary span {
            transition: transform .2s;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 12px 30px rgba(255, 77, 0, .32);
        }

        .btn-primary:hover span {
            transform: translateX(4px);
        }

        .btn-primary:active,
        .btn-ghost:active {
            transform: scale(.98);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 1px solid rgba(255, 255, 255, .55);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 24px;
            border-radius: 10px;
            transition: all .2s cubic-bezier(.2, .7, .2, 1);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, .1);
            border-color: #fff;
        }

        .hero-trust {
            margin-top: 30px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .08);
            border-radius: 999px;
            padding: 7px 14px;
            color: rgba(255, 255, 255, .7);
            font-size: 13px;
        }

        .hero-trust svg {
            color: var(--accent);
        }

        .hero-metrics {
            display: flex;
            gap: 34px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .hero-metrics>div {
            display: flex;
            flex-direction: column;
        }

        .hero-metrics strong {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-metrics span {
            font-size: 12px;
            color: rgba(255, 255, 255, .55);
        }

        .hero-console {
            background: rgba(24, 29, 25, .88);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 24px;
            padding: 22px;
            box-shadow: 0 30px 80px rgba(0, 0, 0, .3);
            backdrop-filter: none;
        }

        .console-cap {
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, .1);
            margin-bottom: 16px;
        }

        .console-cap .dot {
            width: 8px;
            height: 8px;
            border-radius: 999px;
            background: var(--accent);
            box-shadow: 0 0 0 4px rgba(255, 77, 0, .12);
        }

        .console-cap span.cap-text {
            font-size: 14px;
            color: rgba(255, 255, 255, .72);
            font-weight: 500;
        }

        .console-row {
            display: flex;
            align-items: center;
            gap: 14px;
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: 14px;
            padding: 14px 14px;
            margin-bottom: 10px;
            background: rgba(255, 255, 255, .03);
            transition: all .2s cubic-bezier(.2, .7, .2, 1);
        }

        .console-row:hover {
            background: rgba(255, 255, 255, .07);
            border-color: rgba(255, 255, 255, .18);
            transform: translateY(-2px);
        }

        .console-icon {
            width: 40px;
            height: 40px;
            flex: 0 0 40px;
            border-radius: 10px;
            background: rgba(255, 77, 0, .16);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .console-row strong {
            display: block;
            color: #fff;
            font-size: 15px;
            line-height: 1.3;
        }

        .console-row small {
            display: block;
            margin-top: 3px;
            color: rgba(255, 255, 255, .46);
            font-size: 12px;
        }

        .console-row .go {
            margin-left: auto;
            color: rgba(255, 255, 255, .4);
            transition: transform .2s;
        }

        .console-row:hover .go {
            transform: translateX(4px);
            color: #fff;
        }

        .console-note {
            margin: 8px 2px 0;
            color: rgba(255, 255, 255, .38);
            font-size: 12px;
            text-align: right;
        }

        .pain-card {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--bg-surface);
            border: 1px solid var(--border-line);
            border-radius: 14px;
            padding: 20px 22px;
            transition: border-color .2s, box-shadow .2s, transform .2s;
        }

        .pain-card:hover {
            border-color: rgba(255, 77, 0, .3);
            box-shadow: 0 8px 30px rgba(16, 20, 17, .05);
            transform: translateY(-2px);
        }

        .pain-icon {
            width: 42px;
            height: 42px;
            flex: 0 0 42px;
            border-radius: 10px;
            color: var(--accent);
            background: rgba(255, 77, 0, .1);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .pain-card p {
            margin: 0;
            flex: 1;
            font-size: 16px;
            line-height: 1.7;
        }

        .pain-arrow {
            color: #b7bcb5;
            transition: transform .2s, color .2s;
        }

        .pain-card:hover .pain-arrow {
            color: var(--accent);
            transform: translateX(4px);
        }

        .solution-card {
            border-radius: 20px;
            overflow: hidden;
            position: relative;
            transition: box-shadow .2s cubic-bezier(.2, .7, .2, 1), transform .2s, border-color .2s;
        }

        .solution-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(16, 20, 17, .08);
        }

        .solution-card-dark {
            background: var(--bg-night);
            color: #fff;
            padding: 36px;
        }

        .solution-card-white {
            background: var(--bg-surface);
            border: 1px solid var(--border-line);
            padding: 30px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1;
            padding: 8px 14px;
        }

        .tag-dark {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }

        .tag-light {
            background: rgba(255, 77, 0, .1);
            color: var(--accent);
        }

        .link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 15px;
            color: var(--accent);
            transition: gap .2s cubic-bezier(.2, .7, .2, 1), opacity .2s;
        }

        .link-arrow:hover {
            gap: 12px;
            opacity: .85;
        }

        .link-white {
            color: #fff;
        }

        .check-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            color: rgba(255, 255, 255, .72);
            font-size: 15px;
        }

        .check-item:last-child {
            border-bottom: 0;
        }

        .check-item svg {
            color: var(--accent);
            flex: 0 0 18px;
            margin-top: 4px;
        }

        .stat-card {
            background: var(--bg-night2);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 18px;
            padding: 36px 30px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }

        .stat-card strong {
            color: #fff;
            font-size: clamp(44px, 6vw, 64px);
            font-weight: 800;
            line-height: 1.05;
            display: block;
        }

        .stat-card span {
            color: rgba(255, 255, 255, .6);
            font-size: 15px;
            margin-top: 14px;
            line-height: 1.6;
            display: block;
        }

        .news-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-line);
            border-radius: 16px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: border-color .2s cubic-bezier(.2, .7, .2, 1), box-shadow .2s, transform .2s;
        }

        .news-card:hover {
            transform: translateY(-3px);
            border-color: rgba(255, 77, 0, .3);
            box-shadow: 0 16px 40px rgba(16, 20, 17, .08);
        }

        .news-thumb {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: #ebede8;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s cubic-bezier(.2, .7, .2, 1);
        }

        .news-card:hover .news-thumb img {
            transform: scale(1.04);
        }

        .news-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(16, 20, 17, .85);
            color: #fff;
            font-size: 12px;
            padding: 6px 12px;
            border-radius: 999px;
            backdrop-filter: blur(6px);
        }

        .news-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-body time {
            font-size: 12px;
            color: #888d88;
        }

        .news-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            margin: 10px 0 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-body p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-sub);
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .empty-box {
            border: 1px dashed #cfd3cc;
            border-radius: 16px;
            padding: 48px 20px;
            text-align: center;
            color: #a0a69f;
            background: rgba(255, 255, 255, .5);
        }

        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-line);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color .2s;
        }

        .faq-item.open {
            border-color: rgba(255, 77, 0, .3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            text-align: left;
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-ink);
            line-height: 1.5;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            flex: 0 0 28px;
            border-radius: 8px;
            background: rgba(255, 77, 0, .1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            transition: transform .25s cubic-bezier(.2, .7, .2, 1);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: currentColor;
            border-radius: 2px;
        }

        .faq-icon::before {
            width: 12px;
            height: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 12px;
            transition: opacity .2s;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .25s cubic-bezier(.2, .7, .2, 1);
        }

        .faq-answer-inner {
            padding: 0 24px 24px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.9;
            border-top: 1px solid var(--border-line);
            padding-top: 18px;
        }

        .cta-card {
            background: var(--bg-night);
            border-radius: 24px;
            color: #fff;
            overflow: hidden;
            position: relative;
        }

        .cta-card::after {
            content: "";
            position: absolute;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: rgba(255, 77, 0, .12);
            right: -80px;
            top: -120px;
            pointer-events: none;
        }

        .footer {
            background: var(--bg-night);
            color: rgba(255, 255, 255, .65);
            padding-top: 72px;
            padding-bottom: 26px;
            font-size: 14px;
        }

        .footer h4 {
            color: #fff;
            font-size: 15px;
            margin-bottom: 16px;
        }

        .footer a {
            display: block;
            padding: 6px 0;
            color: rgba(255, 255, 255, .65);
            transition: color .2s, transform .2s;
        }

        .footer a:hover {
            color: #fff;
            transform: translateX(3px);
        }

        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .55);
            z-index: 100;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal-box {
            background: #fff;
            width: 100%;
            max-width: 480px;
            border-radius: 20px;
            padding: 32px;
            position: relative;
            max-height: calc(100vh - 40px);
            overflow-y: auto;
            box-shadow: 0 30px 80px rgba(0, 0, 0, .35);
        }

        .modal-close {
            position: absolute;
            right: 16px;
            top: 16px;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: #f2f3f0;
            color: #626861;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background .2s, color .2s;
        }

        .modal-close:hover {
            background: rgba(255, 77, 0, .1);
            color: var(--accent);
        }

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: #262a27;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .privacy-note {
            font-size: 12px;
            line-height: 1.7;
            color: #858a83;
            margin-top: 14px;
        }

        .privacy-note a {
            color: inherit;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .privacy-note a:hover {
            color: var(--accent);
        }

        .submit-btn {
            width: 100%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 13px 20px;
            border-radius: 10px;
            margin-top: 8px;
            transition: background .2s, transform .2s;
        }

        .submit-btn:hover {
            background: var(--accent-hover);
        }

        .submit-btn:active {
            transform: scale(.98);
        }

        .spinner {
            width: 18px;
            height: 18px;
            border: 2px solid rgba(255, 255, 255, .45);
            border-top-color: #fff;
            border-radius: 50%;
            animation: spin .7s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .privacy-slip {
            max-width: 1200px;
            margin: 0 auto;
            padding: 18px 20px 40px;
            font-size: 13px;
            color: #8e938c;
            line-height: 1.7;
        }

        .privacy-slip strong {
            color: #565b55;
        }

        .visible-trigger {
            opacity: 0;
            transform: translateY(14px);
            transition: opacity .5s ease, transform .5s cubic-bezier(.2, .7, .2, 1);
        }

        .visible-trigger.in-view {
            opacity: 1;
            transform: none;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        @media (min-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 1023px) {
            .nav-links {
                display: none;
            }
            .menu-toggle {
                display: inline-flex;
                margin-left: auto;
            }
            .hero-console {
                max-width: 480px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-panel {
                min-height: 64px;
                padding: 8px 12px;
                gap: 10px;
            }
            .brand {
                font-size: 15px;
                gap: 8px;
            }
            .brand-mark {
                width: 36px;
                height: 36px;
                flex-basis: 36px;
            }
            .brand-text {
                white-space: normal;
                line-height: 1.25;
            }
            .cta-btn {
                padding: 9px 13px;
                font-size: 13px;
            }
            .hero-content {
                padding: 64px 0;
                min-height: auto;
            }
            .hero-metrics {
                gap: 24px;
            }
            .hero-trust {
                align-items: flex-start;
                line-height: 1.6;
            }
            .modal-box {
                padding: 24px 20px;
            }
            .stat-card {
                padding: 28px 24px;
            }
            .pain-card {
                padding: 16px;
                gap: 12px;
            }
        }

        @media (prefers-reduced-motion: no-preference) {
            .nav-link,
            .brand-mark,
            .cta-btn,
            .btn-primary,
            .btn-ghost,
            .pain-card,
            .solution-card,
            .news-card,
            .console-row,
            .faq-icon,
            .link-arrow,
            .menu-toggle {
                transition-duration: .2s;
                transition-timing-function: cubic-bezier(.2, .7, .2, 1);
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --page-bg: #F5F5F1;
            --surface: #FFFFFF;
            --night: #101411;
            --night-2: #181D19;
            --ink: #161916;
            --sub: #626861;
            --line: #E4E6E1;
            --accent: #FF4D00;
            --accent-hover: #E64400;
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Source Han Sans SC', 'sans-serif';
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--page-bg);
            color: var(--ink);
            font-family: var(--font-stack);
            -webkit-font-smoothing: antialiased;
            line-height: 1.7;
        }

        * {
            box-sizing: border-box;
        }

        img,
        svg {
            display: block;
            max-width: 100%;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        input {
            font-family: inherit;
        }

        .container-page {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .header-shell {
            position: sticky;
            top: 12px;
            z-index: 50;
            padding-left: 16px;
            padding-right: 16px;
        }

        .nav-panel {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            background: rgba(16, 20, 17, 0.92);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 18px;
            min-height: 74px;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
            backdrop-filter: blur(6px);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .brand-text {
            color: #ffffff;
            font-size: 18px;
            font-weight: 700;
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
            background: transparent;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.72);
            font-size: 14px;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: 10px;
            transition: background 200ms cubic-bezier(0.2, 0.7, 0.2, 1), color 200ms;
            line-height: 1;
            white-space: nowrap;
        }

        .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
        }

        .nav-link.active {
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent);
        }

        .nav-link.active::after {
            content: '';
            width: 4px;
            height: 4px;
            border-radius: 999px;
            background: var(--accent);
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #ffffff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 20px;
            border-radius: 10px;
            transition: background 200ms, transform 200ms, box-shadow 200ms;
            box-shadow: 0 4px 14px rgba(255, 77, 0, 0.25);
            line-height: 1;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .cta-btn i {
            display: inline-flex;
            transition: transform 200ms;
        }

        .cta-btn:hover {
            background: var(--accent-hover);
            box-shadow: 0 8px 22px rgba(255, 77, 0, 0.3);
        }

        .cta-btn:hover i {
            transform: translateX(4px);
        }

        .cta-btn:active {
            transform: scale(0.98);
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: white;
            cursor: pointer;
        }

        .mobile-drawer {
            display: none;
            background: var(--night);
            border-radius: 18px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 10px;
            padding: 16px;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        .mobile-drawer.open {
            display: block;
        }

        .mobile-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 6px;
        }

        .mobile-links a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.8);
            padding: 0 14px;
            height: 48px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 500;
            transition: background 200ms;
        }

        .mobile-links a:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .page-hero {
            position: relative;
            background-image: linear-gradient(to right, rgba(16, 20, 17, 0.92), rgba(16, 20, 17, 0.75)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding-top: 96px;
            padding-bottom: 72px;
            color: #fff;
            min-height: 380px;
            display: flex;
            align-items: center;
        }

        .step-section {
            background: #fff;
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--shadow-soft);
            position: relative;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.02em;
            background: rgba(255, 77, 0, 0.08);
            padding: 6px 14px;
            border-radius: 999px;
        }

        .step-number {
            font-size: clamp(56px, 8vw, 88px);
            font-weight: 800;
            line-height: 1;
            color: #F0F1EC;
            letter-spacing: -0.02em;
            display: block;
        }

        .guide-list-item {
            background: var(--page-bg);
            border-radius: 14px;
            border: 1px solid var(--line);
            padding: 20px 24px;
            transition: box-shadow 200ms;
        }

        .guide-list-item:hover {
            box-shadow: 0 8px 24px rgba(16, 20, 17, 0.04);
        }

        .arrow-circle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 999px;
            background: rgba(255, 77, 0, 0.12);
            color: var(--accent);
            transition: transform 200ms;
            flex-shrink: 0;
        }

        .topic-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 18px;
            padding: 28px;
            transition: transform 200ms cubic-bezier(0.2, 0.7, 0.2, 1), box-shadow 200ms, border-color 200ms;
        }

        .topic-card:hover {
            transform: translateY(-3px);
            border-color: rgba(255, 77, 0, 0.3);
            box-shadow: 0 16px 40px rgba(16, 20, 17, 0.08);
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.8);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            line-height: 1.4;
        }

        .tag-chip-dark {
            background: rgba(255, 77, 0, 0.08);
            color: var(--accent);
            border: 1px solid rgba(255, 77, 0, 0.15);
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            transition: box-shadow 200ms;
        }

        .faq-q {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            gap: 16px;
        }

        .faq-icon {
            position: relative;
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--ink);
            border-radius: 2px;
            transition: transform 200ms;
        }

        .faq-icon::before {
            width: 2px;
            height: 14px;
        }

        .faq-icon::after {
            width: 14px;
            height: 2px;
        }

        .faq-item.open .faq-icon::before {
            transform: rotate(90deg);
        }

        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            color: var(--sub);
            font-size: 14px;
            line-height: 1.9;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .cta-section {
            background: var(--night);
            border-radius: 24px;
            overflow: hidden;
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(circle at 85% 15%, rgba(255, 77, 0, 0.18) 0%, transparent 36%);
            pointer-events: none;
        }

        .cta-card-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: 10px;
            transition: background 200ms, transform 200ms;
            box-shadow: 0 6px 24px rgba(255, 77, 0, 0.22);
            position: relative;
            z-index: 2;
        }

        .cta-card-btn:hover {
            background: var(--accent-hover);
        }

        .cta-card-btn:active {
            transform: scale(0.98);
        }

        .outline-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: border-color 200ms, color 200ms, background 200ms;
        }

        .outline-btn:hover {
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
        }

        .footer {
            background: var(--night);
            color: rgba(255, 255, 255, 0.6);
            padding: 64px 0 32px;
            margin-top: 80px;
        }

        .footer h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            padding: 4px 0;
            transition: color 200ms;
        }

        .footer a:hover {
            color: #fff;
        }

        .privacy-slip {
            margin-top: 20px;
            padding: 12px 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            font-size: 12px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.4);
            background: rgba(255, 255, 255, 0.02);
        }

        .privacy-slip strong {
            color: rgba(255, 255, 255, 0.6);
            font-weight: 600;
        }

        .reveal {
            opacity: 0;
            transform: translateY(14px);
            transition: opacity 600ms cubic-bezier(0.2, 0.7, 0.2, 1), transform 600ms cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 24px;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--night);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 99;
            opacity: 0;
            pointer-events: none;
            transition: opacity 200ms;
        }

        .scroll-top.show {
            opacity: 1;
            pointer-events: auto;
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }
        }

        @media (max-width: 640px) {
            .container-page {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-shell {
                padding-left: 8px;
                padding-right: 8px;
            }

            .nav-panel {
                padding: 0 12px;
                min-height: 64px;
            }

            .brand-text {
                font-size: 16px;
            }

            .cta-btn {
                font-size: 14px;
                padding: 10px 14px;
            }

            .cta-btn span {
                display: none;
            }

            .step-section {
                padding: 24px 20px;
            }

            .page-hero {
                padding-top: 72px;
                padding-bottom: 48px;
                min-height: 300px;
            }

            .author-card {
                flex-direction: column;
                gap: 12px;
            }
        }

        @media (prefers-reduced-motion: no-preference) {
            .reveal.visible {
                transition-delay: 60ms;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
        }

/* roulang page: article */
:root {
            --canvas: #F5F5F1;
            --surface: #FFFFFF;
            --night: #101411;
            --night-2: #181D19;
            --ink: #161916;
            --sub: #626861;
            --line: #E4E6E1;
            --accent: #FF4D00;
            --accent-hover: #E64400;
            --white-85: rgba(255, 255, 255, 0.85);
            --white-55: rgba(255, 255, 255, 0.55);
            --radius-lg: 18px;
            --radius-md: 16px;
            --radius-sm: 10px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--canvas);
            color: var(--ink);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s cubic-bezier(0.2, 0.7, 0.2, 1), border-color 0.2s cubic-bezier(0.2, 0.7, 0.2, 1), background-color 0.2s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.2s cubic-bezier(0.2, 0.7, 0.2, 1), box-shadow 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
        }

        button {
            cursor: pointer;
        }

        .focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 8px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .reading-progress {
            position: fixed;
            top: 0;
            left: 0;
            height: 3px;
            width: 0;
            background: var(--accent);
            z-index: 1000;
            transition: width 0.1s linear;
        }

        /* ========== Header & Nav ========== */
        .header-site {
            position: sticky;
            top: 12px;
            z-index: 60;
            padding: 0 20px;
            max-width: 1240px;
            margin: 0 auto 0;
        }

        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: rgba(16, 20, 17, 0.94);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 18px;
            min-height: 74px;
            padding: 10px 14px 10px 18px;
            box-shadow: 0 8px 30px rgba(16, 20, 17, 0.12);
            transition: transform 0.2s cubic-bezier(0.2, 0.7, 0.2, 1), box-shadow 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .brand-mark {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 14px rgba(255, 77, 0, 0.28);
        }

        .brand-text {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.2;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
            margin-right: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 14px;
            border-radius: 10px;
            color: rgba(255, 255, 255, 0.72);
            font-size: 15px;
            font-weight: 500;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        .nav-link.active {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            right: 10px;
            bottom: 5px;
            width: 4px;
            height: 4px;
            border-radius: 99px;
            background: var(--accent);
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 12px 20px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            white-space: nowrap;
            border: none;
            transition: background 0.2s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.2s cubic-bezier(0.2, 0.7, 0.2, 1), box-shadow 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .cta-btn:hover {
            background: var(--accent-hover);
            box-shadow: 0 8px 22px rgba(255, 77, 0, 0.18);
        }

        .cta-btn:hover svg {
            transform: translateX(4px);
        }

        .cta-btn svg {
            transition: transform 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .cta-btn:active,
        button:active {
            transform: scale(0.98);
        }

        .menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 10px;
            color: #fff;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            margin-left: 8px;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Mobile Nav */
        .mobile-menu {
            display: none;
            background: var(--night);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 0 0 18px 18px;
            padding: 8px 14px 16px;
            margin: 0 auto;
            max-width: calc(100% - 40px);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu a {
            color: rgba(255, 255, 255, 0.76);
            font-size: 15px;
            display: flex;
            align-items: center;
            padding: 12px 10px;
            border-radius: 10px;
            gap: 12px;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(255, 255, 255, 0.08);
            color: var(--accent);
        }

        /* ========== Article Hero ========== */
        .article-hero {
            position: relative;
            background-color: var(--night);
            background-image:
                linear-gradient(100deg, rgba(16, 20, 17, 0.88) 10%, rgba(16, 20, 17, 0.60) 65%, rgba(16, 20, 17, 0.40) 100%),
                url("/assets/images/backpic/back-2.png");
            background-size: cover;
            background-position: center;
            min-height: 440px;
            display: flex;
            align-items: flex-end;
            overflow: hidden;
            border-radius: 0 0 24px 24px;
        }

        .article-hero-inner {
            width: 100%;
            padding: 64px 0 56px;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.58);
            margin-bottom: 26px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb svg {
            width: 14px;
            height: 14px;
            opacity: 0.8;
        }

        .article-hero h1 {
            margin: 0;
            max-width: 920px;
            font-size: clamp(40px, 6vw, 68px);
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.01em;
            color: #fff;
            text-wrap: balance;
        }

        .article-meta-line {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin-top: 26px;
        }

        .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.16);
            background: rgba(255, 255, 255, 0.1);
            padding: 6px 14px;
            color: rgba(255, 255, 255, 0.9);
            font-size: 12px;
        }

        .meta-time {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        /* ========== Article Layout ========== */
        .article-wrap {
            padding: 76px 20px 0;
            max-width: 800px;
            margin: 0 auto;
        }

        .article-body {
            background: var(--surface);
            border: 1px solid rgba(228, 230, 225, 0.9);
            border-radius: 20px;
            padding: clamp(24px, 4.6vw, 56px);
            box-shadow: 0 8px 30px rgba(16, 20, 17, 0.03);
        }

        .article-body > :first-child {
            margin-top: 0;
        }

        .article-body p {
            font-size: 17px;
            line-height: 2.0;
            margin: 0 0 28px;
            color: #2A2E2A;
        }

        .article-body h2 {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
            border-bottom: 1px solid var(--line);
            padding-bottom: 13px;
            margin: 48px 0 24px;
        }

        .article-body h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.5;
            margin: 36px 0 16px;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            margin: 28px 0 12px;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 28px;
            padding-left: 22px;
            line-height: 2.0;
            color: #2A2E2A;
        }

        .article-body li {
            margin-bottom: 8px;
        }

        .article-body blockquote {
            margin: 32px 0;
            padding: 22px 24px;
            background: #FBFBF7;
            border-left: 4px solid var(--accent);
            border-radius: 0 14px 14px 0;
            color: #555B55;
            line-height: 1.9;
        }

        .article-body img {
            width: 100%;
            border-radius: 14px;
            margin: 32px 0;
            height: auto;
            object-fit: cover;
        }

        .article-body a {
            color: var(--ink);
            text-decoration: underline;
            text-decoration-color: rgba(22, 25, 22, 0.4);
            text-underline-offset: 4px;
        }

        .article-body a:hover {
            text-decoration-color: var(--accent);
        }

        .article-empty {
            background: var(--surface);
            border: 1px dashed #C9CEC7;
            border-radius: 20px;
            text-align: center;
            padding: 90px 24px;
        }

        .article-empty-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 22px;
            border-radius: 20px;
            background: var(--canvas);
            color: var(--sub);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .article-empty h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--ink);
            margin: 0 0 10px;
        }

        .article-empty p {
            color: var(--sub);
            margin: 0 0 26px;
            font-size: 15px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 1px solid var(--ink);
            color: var(--ink);
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            background: transparent;
            transition: all 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .btn-outline:hover {
            background: var(--ink);
            color: #fff;
            border-color: var(--ink);
        }

        .btn-dark {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--ink);
            color: #fff;
            padding: 12px 22px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: all 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .btn-dark:hover {
            background: #2D332E;
            transform: translateY(-1px);
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            box-shadow: 0 10px 24px rgba(255, 77, 0, 0.16);
        }

        .btn-accent svg {
            transition: transform 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .btn-accent:hover svg {
            transform: translateX(4px);
        }

        /* ========== Related Section ========== */
        .related-section {
            background: #FFFFFF;
            border-top: 1px solid var(--line);
            padding: 80px 0 90px;
            margin-top: 80px;
        }

        .section-title-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-end;
            gap: 18px;
            margin-bottom: 40px;
        }

        .section-title-row h2 {
            font-size: clamp(26px, 3.6vw, 40px);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin: 0;
        }

        .section-title-row .sub-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--ink);
            font-size: 15px;
            font-weight: 600;
        }

        .section-title-row .sub-link span {
            transition: transform 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .section-title-row .sub-link:hover span {
            transform: translateX(4px);
        }

        .related-card {
            display: block;
            background: var(--canvas);
            border: 1px solid transparent;
            border-radius: 16px;
            overflow: hidden;
            height: 100%;
            box-shadow: 0 6px 20px rgba(16, 20, 17, 0.03);
            transition: all 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .related-card:hover {
            transform: translateY(-3px);
            border-color: rgba(255, 77, 0, 0.3);
            box-shadow: 0 16px 40px rgba(16, 20, 17, 0.08);
        }

        .related-card img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }

        .related-content {
            padding: 22px;
        }

        .related-content h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.5;
            margin: 0 0 10px;
        }

        .related-content p {
            color: var(--sub);
            font-size: 14px;
            line-height: 1.8;
            margin: 0 0 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--sub);
            font-size: 12px;
        }

        .related-meta .tag {
            background: rgba(255, 77, 0, 0.08);
            color: var(--accent);
            border-radius: 999px;
            padding: 4px 10px;
            font-size: 12px;
        }

        /* ========== Article CTA Band ========== */
        .cta-band {
            background: var(--night);
            padding: 80px 0;
        }

        .cta-panel {
            background: var(--night-2);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 24px;
            padding: 44px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 36px;
            flex-wrap: wrap;
        }

        .cta-copy h2 {
            color: #fff;
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 12px;
        }

        .cta-copy p {
            color: rgba(255, 255, 255, 0.58);
            font-size: 15px;
            margin: 0;
            max-width: 650px;
            line-height: 1.9;
        }

        .cta-btn-white {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: #fff;
            color: var(--night);
            padding: 14px 24px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 15px;
            transition: all 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .cta-btn-white:hover {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 10px 28px rgba(255, 77, 0, 0.18);
        }

        .cta-btn-white svg {
            transition: transform 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .cta-btn-white:hover svg {
            transform: translateX(4px);
        }

        /* ========== Footer ========== */
        .footer {
            background: var(--night);
            padding: 70px 0 32px;
        }

        .footer h4 {
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.06em;
            margin: 0 0 18px;
        }

        .footer a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            line-height: 2.2;
            margin-bottom: 6px;
        }

        .footer a:hover {
            color: #fff;
        }

        .privacy-slip {
            max-width: 1200px;
            margin: 16px auto 0;
            padding: 24px 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.45);
            font-size: 12px;
            line-height: 1.9;
        }

        .privacy-slip strong {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ========== Back To Top ========== */
        .back-top {
            position: fixed;
            right: 24px;
            bottom: 24px;
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: var(--ink);
            color: #fff;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(16, 20, 17, 0.16);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.2s cubic-bezier(0.2, 0.7, 0.2, 1);
            z-index: 40;
        }

        .back-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-top:hover {
            background: var(--accent);
        }

        /* ========== Animations ========== */
        @media (prefers-reduced-motion: no-preference) {
            .fade-rise {
                opacity: 0;
                transform: translateY(14px);
                transition: opacity 0.6s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
            }

            .fade-rise.visible {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ========== Responsive ========== */
        @media (max-width: 1280px) {
            .nav-links {
                gap: 2px;
            }

            .nav-link {
                padding: 9px 10px;
                font-size: 14px;
            }

            .cta-btn {
                padding: 11px 16px;
                font-size: 14px;
            }
        }

        @media (max-width: 1024px) {
            .header-site {
                padding: 0 16px;
            }

            .nav-panel {
                flex-wrap: wrap;
                min-height: 66px;
                padding: 8px 10px;
            }

            .nav-links {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .mobile-menu {
                max-width: calc(100% - 32px);
                position: sticky;
                top: 78px;
                z-index: 59;
                margin: -2px auto 0;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .article-hero {
                min-height: 400px;
                border-radius: 0 0 20px 20px;
                background-position: 72% center;
            }

            .article-hero-inner {
                padding: 50px 0 40px;
            }

            .article-wrap {
                padding: 48px 16px 0;
            }

            .article-body {
                padding: 24px 20px;
                border-radius: 16px;
            }

            .article-body p,
            .article-body ul,
            .article-body ol {
                font-size: 16px;
            }

            .article-body h2 {
                font-size: 20px;
            }

            .related-section {
                padding: 64px 0;
                margin-top: 56px;
            }

            .cta-band {
                padding: 56px 0;
            }

            .cta-panel {
                padding: 30px 24px;
                flex-direction: column;
                align-items: flex-start;
                border-radius: 20px;
            }

            .cta-panel .btn-accent,
            .cta-panel .cta-btn-white {
                width: 100%;
                justify-content: center;
            }

            .metadata-grid {
                grid-template-columns: 1fr;
            }

            .article-empty {
                padding: 56px 20px;
            }
        }

        @media (max-width: 640px) {
            .brand-text {
                font-size: 16px;
                letter-spacing: -0.02em;
            }

            .brand-mark {
                width: 34px;
                height: 34px;
            }

            .article-breadcrumb,
            .breadcrumb {
                font-size: 12px;
            }

            .article-meta-line {
                gap: 8px;
            }
        }

/* roulang page: category2 */
:root {
  --canvas: #F5F5F1;
  --surface: #FFFFFF;
  --night: #101411;
  --night-2: #181D19;
  --ink: #161916;
  --sub: #626861;
  --line: #E4E6E1;
  --accent: #FF4D00;
  --accent-hover: #E64400;
  --container: 1200px;
  --radius-panel: 18px;
  --radius-card: 16px;
  --radius-field: 10px;
  --shadow-1: 0 8px 30px rgba(16, 20, 17, 0.05);
  --shadow-2: 0 16px 40px rgba(16, 20, 17, 0.08);
  --transition: cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--canvas);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.3;
  font-weight: 700;
}

p {
  margin: 0;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 200ms var(--transition);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button {
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
  font-family: inherit;
  padding: 0;
}

.wrap,
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

@media (max-width: 640px) {
  .wrap,
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* 页面区块通用间距 */
.section {
  padding-top: 100px;
  padding-bottom: 100px;
}

@media (max-width: 768px) {
  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
}

/* 页面栏目标签 */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.section-label-dark {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.section-label-light {
  background: #f2f2ed;
  color: #161916;
  border: 1px solid #e4e6e1;
}

/* ===================== 导航面板 ===================== */
header {
  position: sticky;
  top: 12px;
  z-index: 60;
  padding-left: 16px;
  padding-right: 16px;
  pointer-events: none;
}

.nav-panel {
  pointer-events: auto;
  position: relative;
  width: min(100%, 1200px);
  margin-left: auto;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 74px;
  padding: 10px 12px 10px 18px;
  background: rgba(16, 20, 17, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-panel);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.16);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: #fff;
}

.brand-mark {
  display: flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
}

.brand-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: 2px;
}

.nav-link {
  position: relative;
  padding: 10px 14px;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  font-weight: 500;
  transition: background 200ms var(--transition), color 200ms var(--transition);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.nav-link.active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: var(--accent);
  transform: translateY(-50%);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: var(--radius-field);
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  flex-shrink: 0;
  transition: background 200ms var(--transition), transform 200ms var(--transition);
}

.cta-btn i {
  display: inline-flex;
  transition: transform 200ms var(--transition);
}

.cta-btn:hover {
  background: var(--accent-hover);
}

.cta-btn:hover i {
  transform: translateX(4px);
}

.cta-btn:active {
  transform: scale(0.98);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
  flex-shrink: 0;
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}

@media (max-width: 1023px) {
  .nav-panel {
    flex-wrap: wrap;
  }

  .brand {
    margin-right: auto;
  }

  .nav-links {
    display: none;
    width: 100%;
    margin-left: 0;
    padding: 6px;
    background: #101411;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
  }

  .nav-links.open {
    display: grid;
  }

  .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 48px;
    color: rgba(255, 255, 255, 0.82);
    padding-left: 16px;
    padding-right: 16px;
  }

  .nav-link.active {
    background: rgba(255, 255, 255, 0.1);
  }

  .nav-link.active::after {
    position: static;
    width: 4px;
    height: 4px;
    transform: none;
    margin-left: 8px;
  }

  .menu-toggle {
    display: inline-flex;
  }
}

/* ===================== 按钮 ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  min-height: 48px;
  border-radius: var(--radius-field);
  font-size: 15px;
  font-weight: 600;
  transition: background 200ms var(--transition), border-color 200ms var(--transition), color 200ms var(--transition), transform 200ms var(--transition), box-shadow 200ms var(--transition);
}

.btn i {
  display: inline-flex;
  transition: transform 200ms var(--transition);
}

.btn:hover i {
  transform: translateX(4px);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  box-shadow: 0 12px 30px rgba(255, 77, 0, 0.18);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.btn-outline-light:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.btn-dark {
  background: #fff;
  color: #161916;
}

.btn-dark:hover {
  background: #f4f4f1;
  color: #161916;
  box-shadow: var(--shadow-2);
}

/* ===================== 图片卡片通用 ===================== */
.media-frame {
  overflow: hidden;
  background: #e8e8e3;
}

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

/* ===================== 分类页 Hero ===================== */
.page-hero {
  min-height: 340px;
  position: relative;
  background-color: #101411;
  overflow: hidden;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(16, 20, 17, 0.94) 0%, rgba(16, 20, 17, 0.78) 52%, rgba(16, 20, 17, 0.45) 100%);
  pointer-events: none;
}

.hero-bg {
  position: absolute;
  inset: 0;
  object-fit: cover;
  opacity: 0.34;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.82);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.4);
}

.hero-check-card {
  border-radius: var(--radius-card);
  background: rgba(24, 29, 25, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
  padding: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.18);
}

.hero-check-head {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.check-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.check-row:last-child {
  border-bottom: 0;
}

.check-row-label {
  width: 78px;
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.5);
}

.check-row-value {
  color: #fff;
  font-weight: 600;
}

/* ===================== 安全原则 ===================== */
.principle-card {
  background: var(--night-2);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
  padding: 30px;
  transition: border-color 200ms var(--transition), transform 200ms var(--transition), box-shadow 200ms var(--transition);
}

.principle-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.2);
}

.principle-index {
  display: inline-flex;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #ff8a52;
  font-size: 18px;
  font-weight: 800;
}

/* ===================== 防护清单 ===================== */
.checklist-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 24px 22px;
  transition: border-color 200ms var(--transition), box-shadow 200ms var(--transition), transform 200ms var(--transition);
}

.checklist-card:hover {
  border-color: rgba(255, 77, 0, 0.4);
  box-shadow: var(--shadow-1);
  transform: translateY(-2px);
}

.checkbox-icon {
  display: flex;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  border-radius: 999px;
  border: 1px solid #cbd0c7;
  background: #fff;
  color: transparent;
  transition: all 200ms var(--transition);
}

.checklist-card:hover .checkbox-icon {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===================== 验证流程 ===================== */
.process-card {
  position: relative;
  border-radius: var(--radius-card);
  padding: 28px;
  background: rgba(24, 29, 25, 0.56);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  transition: border-color 200ms var(--transition), transform 200ms var(--transition);
}

.process-card:hover {
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-3px);
}

.process-num {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.process-num .step-count {
  color: rgba(255, 255, 255, 0.26);
  font-size: 34px;
  font-weight: 800;
}

.process-num svg {
  color: rgba(255, 255, 255, 0.5);
}

/* 警示条 */
.alert-band {
  border-radius: var(--radius-card);
  background: var(--night-2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 4px solid var(--accent);
  padding: 30px;
}

.alert-band-icon {
  display: flex;
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(255, 77, 0, 0.18);
  color: #ff7d47;
}

/* ===================== FAQ ===================== */
.faq-list {
  max-width: 920px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color 200ms var(--transition), box-shadow 200ms var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 77, 0, 0.35);
}

.faq-item.open {
  border-color: rgba(255, 77, 0, 0.42);
  box-shadow: var(--shadow-1);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.faq-question-text {
  flex: 1;
}

.faq-icon {
  display: flex;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--sub);
  transition: transform 300ms var(--transition), background 200ms var(--transition), border-color 200ms var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: rgba(255, 77, 0, 0.08);
  border-color: rgba(255, 77, 0, 0.4);
  color: var(--accent);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 300ms var(--transition);
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
  min-height: 0;
}

.faq-answer-inner p {
  padding: 0 22px 22px;
  color: var(--sub);
  font-size: 15px;
  line-height: 1.9;
}

/* ===================== 页脚 ===================== */
.footer {
  background: var(--night);
  color: #fff;
  padding-top: 80px;
  padding-bottom: 24px;
  scroll-margin-top: 80px;
}

.footer h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer a {
  display: block;
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  line-height: 2.2;
  transition: color 200ms var(--transition);
}

.footer a:hover {
  color: #fff;
}

.footer .footer-about {
  color: rgba(255, 255, 255, 0.55);
}

.privacy-slip {
  max-width: 1200px;
  margin: 20px auto 0;
  padding: 16px 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.42);
  font-size: 13px;
  line-height: 1.8;
}

/* 焦点与行动 */
.cta-panel {
  position: relative;
  overflow: hidden;
  background: var(--night);
}

.cta-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: var(--night-2);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 滚动显现 */
.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 600ms cubic-bezier(0.2, 0.7, 0.2, 1), transform 600ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.js .reveal.in {
  opacity: 1;
  transform: none;
}

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

  html {
    scroll-behavior: auto;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* 移动端收尾 */
@media (max-width: 767px) {
  .page-hero {
    min-height: 420px;
    padding-top: 30px;
  }

  .faq-question {
    font-size: 15px;
  }
}

/* roulang page: category3 */
:root {
      --page: #F5F5F1;
      --surface: #FFFFFF;
      --night: #101411;
      --night2: #181D19;
      --ink: #161916;
      --sub: #626861;
      --line: #E4E6E1;
      --accent: #FF4D00;
      --accent-hover: #E64400;
      --r-lg: 18px;
      --r-md: 16px;
      --r-sm: 10px;
      --shadow: 0 8px 30px rgba(16,20,17,0.05);
      --shadow-hover: 0 16px 40px rgba(16,20,17,0.08);
    }

    html { scroll-behavior: smooth; }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
      background: var(--page);
      color: var(--ink);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    *, *::before, *::after { box-sizing: border-box; }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; transition: color .2s cubic-bezier(.2,.7,.2,1); }
    p { margin: 0; }
    button { font: inherit; cursor: pointer; }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-inline: auto;
      padding-inline: 20px;
    }

    .header-shell {
      position: sticky;
      top: 0;
      z-index: 60;
      padding-top: 12px;
    }

    .nav-panel {
      display: flex;
      align-items: center;
      gap: 14px;
      height: 74px;
      padding: 0 16px;
      border-radius: 18px;
      background: rgba(16,20,17,0.93);
      border: 1px solid rgba(255,255,255,0.10);
      box-shadow: 0 12px 40px rgba(16,20,17,0.16);
      position: relative;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .brand-mark {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--accent);
      color: #fff;
      transition: background .2s;
    }

    .brand:hover .brand-mark { background: var(--accent-hover); }

    .brand-text {
      color: #fff;
      font-size: 18px;
      font-weight: 700;
      letter-spacing: 0.02em;
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      flex: 1;
      min-width: 0;
    }

    .nav-link {
      display: flex;
      align-items: center;
      flex-direction: column;
      gap: 3px;
      padding: 9px 14px;
      border-radius: 10px;
      color: rgba(255,255,255,0.72);
      font-size: 15px;
      font-weight: 500;
      transition: background .2s, color .2s;
      position: relative;
      white-space: nowrap;
    }

    .nav-link:hover { background: rgba(255,255,255,0.10); color: #fff; }

    .nav-link.active {
      background: rgba(255,255,255,0.12);
      color: var(--accent);
      font-weight: 600;
    }

    .nav-link.active::after {
      content: "";
      width: 4px;
      height: 4px;
      border-radius: 999px;
      background: var(--accent);
      display: block;
      margin: 2px auto 0;
    }

    .cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 18px;
      border-radius: 10px;
      background: var(--accent);
      color: #fff;
      font-weight: 600;
      font-size: 15px;
      white-space: nowrap;
      flex-shrink: 0;
      transition: background .2s, transform .2s, box-shadow .2s;
    }

    .cta-btn:hover { background: var(--accent-hover); }
    .cta-btn:active { transform: scale(.98); }
    .cta-btn i { display: inline-flex; transition: transform .2s; }
    .cta-btn:hover i { transform: translateX(4px); }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      border: 1px solid rgba(255,255,255,0.10);
      background: rgba(255,255,255,0.06);
      color: #fff;
      align-items: center;
      justify-content: center;
    }

    .menu-toggle:hover { background: rgba(255,255,255,0.12); }

    .category-hero {
      position: relative;
      min-height: 360px;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
      border-radius: 32px;
      overflow: hidden;
      margin: 24px auto 0;
      max-width: 1200px;
    }

    .category-hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(110deg, rgba(8,11,9,0.88) 20%, rgba(16,20,17,0.62) 70%, rgba(16,20,17,0.35) 100%);
      z-index: 1;
    }

    .category-hero-inner {
      position: relative;
      z-index: 2;
      padding-top: 68px;
      padding-bottom: 68px;
      color: #fff;
      max-width: 860px;
    }

    .breadcrumb-cat {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: rgba(255,255,255,0.68);
      margin-bottom: 20px;
    }

    .breadcrumb-cat a { transition: color .2s; }
    .breadcrumb-cat a:hover { color: #fff; }
    .breadcrumb-cat span { color: rgba(255,255,255,0.36); }

    .category-hero h1 {
      font-size: clamp(40px, 6vw, 64px);
      font-weight: 800;
      line-height: 1.08;
      letter-spacing: -0.02em;
      margin: 0 0 20px;
    }

    .category-hero .lead {
      font-size: 17px;
      line-height: 1.9;
      color: rgba(255,255,255,0.78);
      max-width: 640px;
    }

    .category-hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 28px;
    }

    .cat-tag {
      padding: 7px 16px;
      border: 1px solid rgba(255,255,255,0.22);
      background: rgba(255,255,255,0.10);
      color: rgba(255,255,255,0.9);
      border-radius: 999px;
      font-size: 13px;
      letter-spacing: 0.04em;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border-radius: 12px;
      padding: 14px 24px;
      font-weight: 600;
      font-size: 15px;
      transition: background .2s, color .2s, border-color .2s, transform .2s, box-shadow .2s;
      border: 1px solid transparent;
    }

    .btn:active { transform: scale(.98); }

    .btn-primary { background: var(--accent); color: #fff; }
    .btn-primary:hover { background: var(--accent-hover); }

    .btn-light {
      background: #fff;
      color: #101411;
      border-color: rgba(255,255,255,0.35);
    }
    .btn-light:hover { background: #f2f2f2; }

    .btn-outline {
      border-color: var(--ink);
      color: var(--ink);
    }
    .btn-outline:hover { border-color: var(--accent); color: var(--accent); }

    .btn i { display: inline-flex; transition: transform .2s; }
    .btn:hover i { transform: translateX(4px); }

    .section { padding-block: 88px; }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 48px;
    }

    .section-head .eyebrow {
      color: var(--accent);
      font-size: 14px;
      font-weight: 600;
      letter-spacing: .18em;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: clamp(26px, 3.6vw, 44px);
      line-height: 1.2;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin: 0;
      color: var(--ink);
    }

    .section-desc { color: var(--sub); font-size: 15px; line-height: 1.9; max-width: 640px; }

    .card {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: 16px;
      box-shadow: var(--shadow);
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
      overflow: hidden;
    }

    .card:hover {
      transform: translateY(-3px);
      border-color: rgba(255,77,0,0.30);
      box-shadow: var(--shadow-hover);
    }

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

    .tag-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fff;
      color: var(--ink);
      border: 1px solid var(--line);
      padding: 5px 12px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
    }

    .tag-accent {
      color: var(--accent);
      border-color: rgba(255,77,0,0.3);
      background: rgba(255,77,0,0.06);
    }

    .time-selector {
      font-size: 13px;
      color: var(--sub);
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }

    .text-arrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 15px;
      font-weight: 600;
      color: var(--ink);
      transition: color .2s;
    }
    .text-arrow i { display: inline-flex; transition: transform .2s; }
    .text-arrow:hover { color: var(--accent); }
    .text-arrow:hover i { transform: translateX(4px); }

    .timeline-shell {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 20px;
      padding: 34px;
      box-shadow: var(--shadow);
    }

    .timeline-shell .timeline-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--ink);
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .timeline-frame {
      position: relative;
      padding-left: 26px;
      border-left: 1px solid #e1e4df;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .timeline-item {
      position: relative;
      padding: 18px 20px;
      background: var(--page);
      border-radius: 14px;
      border: 1px solid var(--line);
      transition: border-color .2s, transform .2s;
    }

    .timeline-item:hover { border-color: rgba(255,77,0,0.3); transform: translateY(-2px); }

    .timeline-item::before {
      content: "";
      width: 10px;
      height: 10px;
      border-radius: 999px;
      background: var(--accent);
      border: 3px solid #fff;
      box-shadow: 0 0 0 2px rgba(255,77,0,0.25);
      position: absolute;
      left: -31px;
      top: 27px;
    }

    .timeline-meta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
      margin-bottom: 8px;
    }

    .timeline-pill {
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
    }

    .timeline-item h4 { font-size: 17px; font-weight: 700; margin: 0 0 8px; }
    .timeline-item p { font-size: 14px; color: var(--sub); line-height: 1.8; }

    .spotlight-card {
      position: relative;
      overflow: hidden;
      border-radius: 22px;
      background: var(--night);
      border: 1px solid rgba(255,255,255,0.06);
      min-height: 420px;
      display: flex;
      align-items: flex-end;
      transition: transform .2s ease, box-shadow .2s ease;
    }

    .spotlight-card:hover { transform: translateY(-3px); box-shadow: 0 20px 46px rgba(16,20,17,.18); }
    .spotlight-card .spotlight-bg { position: absolute; inset: 0; object-fit: cover; opacity: .6; }
    .spotlight-card .spotlight-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(16,20,17,.04) 30%, rgba(16,20,17,.92) 100%); }
    .spotlight-content { position: relative; z-index: 2; padding: 44px; color: #fff; }

    .info-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 16px;
      margin-top: 30px;
    }

    .news-card {
      display: grid;
      grid-template-columns: 260px 1fr;
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: 16px;
      overflow: hidden;
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s;
    }

    .news-card:hover { transform: translateY(-3px); border-color: rgba(255,77,0,.3); box-shadow: var(--shadow-hover); }

    .news-card .news-thumb { overflow: hidden; border-radius: 0; }
    .news-card .news-thumb img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16/10; transition: transform .5s ease; }
    .news-card:hover .news-thumb img { transform: scale(1.04); }
    .news-card .news-body { padding: 24px; display: flex; flex-direction: column; gap: 12px; }

    .step-card {
      display: flex;
      gap: 20px;
      align-items: flex-start;
      background: #fff;
      border: 1px solid var(--line);
      padding: 28px;
      border-radius: 18px;
      box-shadow: var(--shadow);
    }

    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: var(--night);
      color: #fff;
      font-weight: 800;
      font-size: 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .step-card h3 { font-size: 18px; font-weight: 700; margin: 0 0 8px; }
    .step-card p { font-size: 14px; color: var(--sub); line-height: 1.9; }

    .faq-item {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 16px;
      margin-bottom: 16px;
      transition: border-color .2s;
    }

    .faq-item.open { border-color: rgba(255,77,0,0.30); }

    .faq-question {
      width: 100%;
      background: transparent;
      border: 0;
      padding: 22px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: var(--ink);
      font-weight: 600;
      font-size: 16px;
      text-align: left;
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid var(--line);
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: transform .25s ease, background .25s ease;
      flex-shrink: 0;
      font-size: 20px;
    }

    .faq-item.open .faq-icon { transform: rotate(45deg); background: rgba(255,77,0,0.08); border-color: rgba(255,77,0,0.35); }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      color: var(--sub);
      font-size: 14px;
      line-height: 1.9;
      transition: max-height .35s cubic-bezier(.2,.7,.2,1);
    }

    .faq-answer-inner { padding: 0 22px 24px; }

    .panel-xl {
      background: var(--night);
      border-radius: 28px;
      color: #fff;
      padding: 70px 64px;
      position: relative;
      overflow: hidden;
    }

    .footer {
      background: var(--night);
      padding: 70px 0 32px;
      color: rgba(255,255,255,0.88);
      margin-top: 30px;
    }

    .footer h4 {
      color: #fff;
      font-size: 15px;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer a {
      display: block;
      color: rgba(255,255,255,0.55);
      font-size: 14px;
      line-height: 1.9;
      transition: color .2s;
    }

    .footer a:hover { color: #fff; }

    .privacy-slip {
      margin-top: 20px;
      border-top: 1px solid rgba(255,255,255,0.10);
      padding-top: 18px;
      color: rgba(255,255,255,0.42);
      font-size: 12px;
      line-height: 1.8;
    }

    .privacy-slip strong { color: rgba(255,255,255,0.7); }

    :focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 3px;
    }

    .js [data-reveal] {
      opacity: 0;
      transform: translateY(14px);
      transition: opacity .5s ease, transform .5s ease;
    }

    .js [data-reveal].revealed { opacity: 1; transform: none; }

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
      }
      html { scroll-behavior: auto; }
      .js [data-reveal] { opacity: 1; transform: none; }
    }

    @media (max-width: 1060px) {
      .nav-links { display: none; flex-direction: column; align-items: stretch; width: 100%; margin-top: 12px; padding: 12px 0; border-top: 1px solid rgba(255,255,255,0.08); gap: 4px; }
      .nav-links.open { display: flex; }
      .nav-link { flex-direction: row; gap: 10px; }
      .nav-link.active::after { content: ""; width: 6px; height: 6px; margin: 0 0 0 4px; }
      .nav-panel { height: auto; flex-wrap: wrap; padding: 10px 16px; }
      .menu-toggle { display: inline-flex; }
      .nav-links { order: 4; flex: 0 0 100%; }
    }

    @media (max-width: 768px) {
      .section { padding-block: 64px; }
      .section-head { flex-direction: column; align-items: flex-start; gap: 14px; }
      .category-hero { min-height: 340px; border-radius: 20px; }
      .category-hero-inner { padding-top: 56px; padding-bottom: 56px; }
      .category-hero h1 { font-size: clamp(34px, 9vw, 54px); }
      .category-hero .lead { font-size: 16px; }
      .timeline-shell { padding: 24px 18px; }
      .news-card { grid-template-columns: 1fr; }
      .news-card .news-thumb img { aspect-ratio: 16/8; }
      .panel-xl { padding: 46px 26px; border-radius: 20px; }
      .brand-text { font-size: 16px; }
      .cta-btn { padding: 11px 14px; font-size: 14px; }
    }

    @media (max-width: 640px) {
      .brand-text { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
      .cta-btn span.cta-label { display: none; }
      .cta-btn { padding: 11px 14px; }
      .info-grid { grid-template-columns: 1fr; }
      .step-card { flex-direction: column; gap: 12px; }
      .btn { width: 100%; }
      .footer { padding-inline: 16px; }
    }

    .tag-row { display: flex; flex-wrap: wrap; gap: 10px; }
    .arrow-link i { display: inline-flex; transition: transform .2s; }
    .arrow-link:hover i { transform: translateX(4px); }

/* roulang page: category4 */
:root {
            --page-bg: #F5F5F1;
            --surface: #FFFFFF;
            --night: #101411;
            --night-2: #181D19;
            --ink: #161916;
            --sub: #626861;
            --line: #E4E6E1;
            --accent: #FF4D00;
            --accent-hover: #E64400;
            --radius-lg: 18px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-soft: 0 8px 30px rgba(16, 20, 17, 0.05);
            --shadow-hover: 0 16px 40px rgba(16, 20, 17, 0.08);
            --transition: 200ms cubic-bezier(0.2, 0.7, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
            background: var(--page-bg);
            color: var(--ink);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

        button,
        input,
        textarea {
            font: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 12px;
            z-index: 60;
            padding-left: 20px;
            padding-right: 20px;
        }

        .nav-panel {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
            height: 74px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(16, 20, 17, 0.92);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 18px;
            padding: 0 20px;
            box-shadow: 0 18px 50px rgba(16, 20, 17, 0.2);
            transition: box-shadow var(--transition);
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            min-width: 0;
        }

        .brand-mark {
            display: inline-flex;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: var(--accent);
            color: #ffffff;
            flex: none;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            padding: 10px 14px;
            border-radius: 10px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            transition: background var(--transition), color var(--transition);
        }

        .nav-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
        }

        .nav-link.active {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }

        .nav-link.active::after {
            content: "";
            width: 5px;
            height: 5px;
            border-radius: 999px;
            background: var(--accent);
            position: absolute;
            right: 7px;
            top: 7px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 10px;
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            line-height: 1;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            flex: none;
        }

        .cta-btn i {
            display: inline-flex;
            align-items: center;
            transition: transform var(--transition);
            font-style: normal;
        }

        .cta-btn:hover {
            background: var(--accent-hover);
            box-shadow: 0 12px 28px rgba(255, 77, 0, 0.25);
        }

        .cta-btn:hover i {
            transform: translateX(4px);
        }

        .cta-btn:active,
        .btn-accent:active,
        .modal-submit:active {
            transform: scale(0.98);
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: background var(--transition);
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        @media (max-width: 1023px) {
            .nav-links {
                position: absolute;
                left: 12px;
                right: 12px;
                top: 80px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
                background: var(--night);
                border: 1px solid rgba(255, 255, 255, 0.08);
                border-radius: 18px;
                padding: 12px;
                box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
            }

            .nav-panel.open .nav-links {
                display: flex;
            }

            .nav-link {
                min-height: 48px;
                justify-content: flex-start;
                padding: 0 16px;
                border-radius: 12px;
            }

            .nav-link.active {
                background: rgba(255, 255, 255, 0.1);
            }

            .nav-link.active::after {
                right: 16px;
                top: 50%;
                transform: translateY(-50%);
            }

            .cta-btn {
                margin-left: auto;
            }

            .menu-toggle {
                display: inline-flex;
            }
        }

        @media (max-width: 480px) {
            header {
                padding-left: 12px;
                padding-right: 12px;
            }

            .nav-panel {
                padding: 0 12px;
            }

            .brand-text {
                font-size: 15px;
            }

            .cta-btn {
                padding: 9px 13px;
                font-size: 13px;
            }

            .brand-mark {
                width: 34px;
                height: 34px;
            }
        }

        /* Hero */
        .cat-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: clamp(56px, 10vw, 116px) 0 68px;
            color: #fff;
            overflow: hidden;
        }

        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(16, 20, 17, 0.88) 0%, rgba(16, 20, 17, 0.56) 55%, rgba(16, 20, 17, 0.62) 100%);
        }

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

        .crumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            margin-bottom: 24px;
        }

        .crumb a {
            color: rgba(255, 255, 255, 0.6);
        }

        .crumb a:hover {
            color: #fff;
        }

        .crumb .sep {
            opacity: 0.45;
        }

        .hero-badge {
            display: inline-block;
            padding: 7px 14px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.18);
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.9);
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: 18px;
        }

        .hero-tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 26px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            padding: 9px 15px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.16);
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.78);
            font-size: 13px;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }

        .hero-tag:hover {
            border-color: rgba(255, 255, 255, 0.55);
            color: #fff;
        }

        /* 通用区块 */
        .pg-section {
            padding: clamp(56px, 7vw, 100px) 0;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(26px, 3.6vw, 42px);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
        }

        .section-lead {
            color: var(--sub);
            font-size: 16px;
            line-height: 1.9;
            max-width: 620px;
        }

        .topic-card {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 18px;
            border-radius: 18px;
            background: var(--surface);
            border: 1px solid var(--line);
            padding: 28px;
            box-shadow: var(--shadow-soft);
            min-height: 240px;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .topic-card:hover {
            transform: translateY(-3px);
            border-color: rgba(255, 77, 0, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .topic-card.is-dark {
            background: var(--night);
            border-color: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .topic-card.is-dark .topic-link {
            color: rgba(255, 255, 255, 0.75);
        }

        .topic-card.is-dark p {
            color: rgba(255, 255, 255, 0.55);
        }

        .topic-card.is-dark .card-icon {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .card-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(255, 77, 0, 0.1);
            color: var(--accent);
            flex: none;
        }

        .topic-title {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .topic-desc {
            font-size: 14px;
            line-height: 1.9;
            color: var(--sub);
        }

        .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            margin-top: auto;
        }

        .topic-link svg {
            transition: transform var(--transition);
        }

        .topic-link:hover svg {
            transform: translateX(4px);
        }

        /* FAQ / 帮助主体 */
        .help-shell {
            background: linear-gradient(120deg, #101411, #1b201d 60%, #101411);
            border-radius: 26px;
            color: #fff;
            padding: clamp(26px, 4vw, 60px);
            box-shadow: 0 24px 80px rgba(16, 20, 17, 0.24);
        }

        .help-sidenav {
            position: sticky;
            top: 112px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 6px;
        }

        .help-sidenav-title {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
            margin: 4px 12px 12px;
            letter-spacing: 0.1em;
        }

        .help-sidenav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.66);
            font-size: 14px;
            border: 1px solid transparent;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }

        .help-sidenav a .num {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.35);
            font-weight: 700;
            transition: color var(--transition);
        }

        .help-sidenav a:hover {
            background: rgba(255, 255, 255, 0.07);
            color: #fff;
        }

        .help-sidenav a:hover .num {
            color: var(--accent);
        }

        .faq-section {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 34px;
            margin-top: 30px;
        }

        .faq-section:first-child {
            border-top: 0;
            margin-top: 0;
            padding-top: 0;
        }

        .faq-section-title {
            font-size: 20px;
            font-weight: 600;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 12px;
            color: #fff;
        }

        .faq-section-title span {
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            background: rgba(255, 77, 0, 0.14);
            color: #ff4d00;
            font-size: 12px;
            font-weight: 700;
        }

        .faq-item {
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.2);
            margin-top: 16px;
            overflow: hidden;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .faq-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            text-align: left;
            padding: 18px 20px;
            color: var(--ink);
            font-size: 16px;
            font-weight: 600;
            line-height: 1.6;
            transition: background var(--transition), color var(--transition);
        }

        .faq-question .q-mark {
            color: var(--accent);
            font-weight: 700;
            margin-right: 2px;
        }

        .plus {
            width: 28px;
            height: 28px;
            flex: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--sub);
            border-radius: 999px;
            background: rgba(16, 20, 17, 0.05);
            transition: transform var(--transition), color var(--transition), background var(--transition);
        }

        .faq-item.open .plus {
            transform: rotate(45deg);
            color: #fff;
            background: var(--accent);
        }

        .faq-answer {
            display: none;
            padding: 0 24px 24px 60px;
            font-size: 14px;
            line-height: 1.95;
            color: var(--sub);
            border-top: 1px solid rgba(16, 20, 17, 0.05);
            margin-top: 0;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-answer p {
            color: var(--sub);
            line-height: 1.9;
        }

        .faq-cta-lite {
            margin-top: 18px;
            font-size: 13px;
            color: var(--sub);
            padding: 16px 20px;
            background: rgba(255, 77, 0, 0.08);
            border-left: 3px solid var(--accent);
            border-radius: 0 12px 12px 0;
            line-height: 1.8;
        }

        /* 按钮 */
        .btn-accent,
        .btn-ghost-dark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 22px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border: 1px solid var(--accent);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            box-shadow: 0 14px 30px rgba(255, 77, 0, 0.24);
        }

        .btn-ghost-dark {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

        .btn-ghost-dark:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
        }

        @media (max-width: 640px) {
            .btn-accent,
            .btn-ghost-dark {
                width: 100%;
            }
        }

        /* CTA 区 */
        .cta-shell {
            background: var(--night);
            border-radius: 24px;
            color: #fff;
            overflow: hidden;
            position: relative;
        }

        .cta-shell-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.24;
        }

        .cta-privacy-note {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.8;
            margin-top: 18px;
        }

        .cta-privacy-note a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .cta-privacy-note a:hover {
            color: var(--accent);
        }

        /* footer */
        .footer {
            background: var(--night);
            color: #fff;
            padding-top: 76px;
            padding-bottom: 34px;
            margin-top: 40px;
        }

        .footer h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer a {
            display: block;
            color: rgba(255, 255, 255, 0.52);
            padding: 5px 0;
            font-size: 14px;
        }

        .footer a:hover {
            color: #fff;
        }

        .privacy-slip {
            max-width: 1200px;
            margin: 28px auto 0;
            padding: 18px 20px;
            font-size: 12px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.55);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 12px;
        }

        .privacy-slip strong {
            color: rgba(255, 255, 255, 0.75);
            font-weight: 600;
        }

        /* 滚动显现 */
        .js .reveal {
            opacity: 0;
            transform: translateY(14px);
            transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .js .reveal.in-view {
            opacity: 1;
            transform: none;
        }

        @media (prefers-reduced-motion: reduce) {
            .js .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
        }

        /* modal */
        .modal {
            position: fixed;
            inset: 0;
            z-index: 100;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition);
        }

        .modal-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            backdrop-filter: blur(2px);
        }

        .modal-panel {
            position: relative;
            width: 100%;
            max-width: 480px;
            max-height: calc(100vh - 40px);
            overflow: auto;
            background: #fff;
            border-radius: 20px;
            padding: 34px;
            box-shadow: 0 30px 80px rgba(0, 0, 0, 0.2);
            transform: translateY(12px) scale(0.99);
            transition: transform var(--transition);
        }

        .modal.is-open {
            opacity: 1;
            pointer-events: auto;
        }

        .modal.is-open .modal-panel {
            transform: none;
        }

        .modal-close {
            position: absolute;
            right: 18px;
            top: 16px;
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            color: var(--sub);
            background: rgba(16, 20, 17, 0.05);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .modal-close:hover {
            background: var(--accent);
            color: #fff;
        }

        .form-label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 7px;
        }

        .form-field {
            width: 100%;
            border-radius: 10px;
            border: 1px solid var(--line);
            background: #fff;
            padding: 11px 14px;
            font-size: 14px;
            color: var(--ink);
            transition: border-color var(--transition), box-shadow var(--transition);
            margin-bottom: 16px;
        }

        .form-field:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(255, 77, 0, 0.12);
        }

        textarea.form-field {
            resize: vertical;
            min-height: 110px;
            line-height: 1.7;
        }

        .modal-submit {
            width: 100%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 20px;
            border-radius: 10px;
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            transition: background var(--transition), transform var(--transition);
        }

        .modal-submit:hover {
            background: var(--accent-hover);
        }

        .spinner {
            width: 18px;
            height: 18px;
            border: 2px solid rgba(255, 255, 255, 0.4);
            border-top-color: #fff;
            border-radius: 50%;
            animation: spin 0.7s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .privacy-inline {
            font-size: 12px;
            color: var(--sub);
            line-height: 1.8;
            margin-top: 18px;
            padding-top: 16px;
            border-top: 1px solid var(--line);
        }

        .privacy-inline a {
            text-decoration: underline;
            text-underline-offset: 3px;
            color: var(--ink);
        }

        .privacy-inline a:hover {
            color: var(--accent);
        }

        @media (max-width: 640px) {
            .help-shell {
                padding: 20px;
                border-radius: 18px;
            }

            .faq-question {
                padding: 16px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 16px 20px 52px;
            }

            .modal-panel {
                padding: 24px 20px;
            }
        }