/* roulang page: index */
:root {
            --color-bg: #0b0f1a;
            --color-bg-soft: #101826;
            --color-surface: #151d2f;
            --color-surface-2: #1a2338;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-text: #f3f6fc;
            --color-text-dim: #9aa7bd;
            --color-accent: #5b8cff;
            --color-accent-2: #9d6bff;
            --color-success: #2bd576;
            --color-warning: #ffc75f;
            --color-danger: #ff6b81;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 28px;
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.28);
            --shadow-md: 0 10px 36px rgba(0, 0, 0, 0.38);
            --shadow-glow: 0 0 38px rgba(91, 140, 255, 0.22);
            --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            --container-w: 1200px;
            --space-section: clamp(64px, 7vw, 120px);
            --header-h: 72px;
            --transition: all 0.3s ease;
        }

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

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

        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            min-height: 100vh;
            overflow-x: hidden;
            font-size: 16px;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 clamp(20px, 4vw, 40px);
        }

        .section {
            padding: var(--space-section) 0;
            position: relative;
        }

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

        .section__head {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: clamp(32px, 5vw, 56px);
        }

        .section__head--center {
            align-items: center;
            text-align: center;
        }

        .section__title {
            font-size: clamp(28px, 3.6vw, 44px);
            line-height: 1.25;
            letter-spacing: -0.02em;
            font-weight: 700;
        }

        .section__title span {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section__subtitle {
            color: var(--color-text-dim);
            max-width: 720px;
            font-size: 16px;
            line-height: 1.8;
        }

        .section__head--center .section__subtitle {
            margin: 0 auto;
        }

        .accent-line {
            width: 56px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.5;
            letter-spacing: 0.01em;
            transition: var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn--primary {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
            color: #fff;
            box-shadow: 0 4px 20px rgba(91, 140, 255, 0.35);
        }

        .btn--primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(91, 140, 255, 0.45);
            filter: brightness(1.06);
        }

        .btn--ghost {
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.03);
        }

        .btn--ghost:hover {
            border-color: var(--color-accent);
            background: rgba(91, 140, 255, 0.1);
            transform: translateY(-2px);
        }

        .btn--light {
            background: #fff;
            color: #0b0f1a;
        }

        .btn--light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(255, 255, 255, 0.25);
        }

        /* Badges & Tags */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(91, 140, 255, 0.12);
            border: 1px solid rgba(91, 140, 255, 0.25);
            color: #a9c4ff;
            line-height: 1.4;
        }

        .badge--success {
            background: rgba(43, 213, 118, 0.12);
            border-color: rgba(43, 213, 118, 0.25);
            color: #78e8ad;
        }

        .badge--warning {
            background: rgba(255, 199, 95, 0.1);
            border-color: rgba(255, 199, 95, 0.25);
            color: #ffd889;
        }

        .badge--purple {
            background: rgba(157, 107, 255, 0.12);
            border-color: rgba(157, 107, 255, 0.25);
            color: #c4a7ff;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-success);
            display: inline-block;
            box-shadow: 0 0 10px var(--color-success);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-h);
            background: rgba(11, 15, 26, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
        }

        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 24px;
        }

        .header__logo {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 8px;
            position: relative;
            z-index: 10;
        }

        .header__logo-mark {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-accent);
            box-shadow: 0 0 12px var(--color-accent), 0 0 28px var(--color-accent-2);
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .header__nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-dim);
            position: relative;
            padding: 6px 0;
            transition: var(--transition);
        }

        .header__nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
            border-radius: 4px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }

        .header__nav-link:hover,
        .header__nav-link.is-active {
            color: var(--color-text);
        }

        .header__nav-link:hover::after,
        .header__nav-link.is-active::after {
            transform: scaleX(1);
        }

        .header__cta {
            margin-left: 8px;
        }

        .header__hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            z-index: 10;
        }

        .header__hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-text);
            border-radius: 4px;
            transition: var(--transition);
        }

        .header__hamburger.is-open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .header__hamburger.is-open span:nth-child(2) {
            opacity: 0;
        }

        .header__hamburger.is-open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: calc(100vh - var(--header-h));
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            isolation: isolate;
            padding: clamp(48px, 8vw, 96px) 0;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 15, 26, 0.95) 0%, rgba(11, 15, 26, 0.78) 55%, rgba(11, 15, 26, 0.55) 100%);
            z-index: -1;
        }

        .hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 50%, rgba(91, 140, 255, 0.15), transparent 60%);
            z-index: -1;
        }

        .hero__inner {
            max-width: 720px;
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .hero__badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero__title {
            font-size: clamp(40px, 6vw, 68px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.03em;
        }

        .hero__title span {
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero__lead {
            font-size: clamp(16px, 2vw, 20px);
            color: var(--color-text-dim);
            line-height: 1.8;
            max-width: 620px;
        }

        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hero__note {
            font-size: 14px;
            color: var(--color-text-dim);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* Card grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: clamp(20px, 3vw, 32px);
        }

        .card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at top right, rgba(91, 140, 255, 0.08), transparent 60%);
            opacity: 0;
            transition: var(--transition);
        }

        .card:hover {
            border-color: rgba(91, 140, 255, 0.3);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .card:hover::before {
            opacity: 1;
        }

        .card__icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(91, 140, 255, 0.15), rgba(157, 107, 255, 0.15));
            border: 1px solid rgba(91, 140, 255, 0.2);
            margin-bottom: 20px;
            font-size: 24px;
        }

        .card__title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .card__text {
            color: var(--color-text-dim);
            font-size: 15px;
            line-height: 1.7;
        }

        /* Category cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: clamp(20px, 3vw, 32px);
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            transition: var(--transition);
            display: flex;
            min-height: 280px;
        }

        .category-card:hover {
            border-color: rgba(91, 140, 255, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .category-card__body {
            flex: 1;
            padding: clamp(24px, 4vw, 36px);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: center;
            gap: 14px;
            z-index: 1;
        }

        .category-card__title {
            font-size: clamp(22px, 2.4vw, 30px);
            font-weight: 700;
        }

        .category-card__text {
            color: var(--color-text-dim);
            line-height: 1.75;
            max-width: 360px;
        }

        .category-card__media {
            width: 44%;
            position: relative;
            overflow: hidden;
            flex-shrink: 0;
        }

        .category-card__media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
            transition: transform 0.5s ease;
        }

        .category-card:hover .category-card__media img {
            transform: scale(1.05);
        }

        .category-card__media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, var(--color-surface), transparent 60%);
        }

        /* News / list */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: clamp(20px, 3vw, 30px);
        }

        .news-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
        }

        .news-card:hover {
            border-color: rgba(91, 140, 255, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .news-card__link {
            display: flex;
            flex-direction: column;
            gap: 12px;
            padding: 24px;
            width: 100%;
            height: 100%;
        }

        .news-card__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-card__date {
            color: var(--color-text-dim);
            font-size: 13px;
        }

        .news-card__title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
        }

        .news-card__text {
            color: var(--color-text-dim);
            font-size: 14px;
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card__more {
            font-size: 14px;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
        }

        .news-card__more::after {
            content: "→";
            transition: transform 0.3s ease;
        }

        .news-card:hover .news-card__more::after {
            transform: translateX(4px);
        }

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px;
            color: var(--color-text-dim);
            background: var(--color-surface);
            border: 1px dashed var(--color-border);
            border-radius: var(--radius-md);
        }

        /* Process */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: clamp(20px, 3vw, 32px);
            counter-reset: process;
        }

        .process-step {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            position: relative;
            transition: var(--transition);
        }

        .process-step:hover {
            border-color: rgba(157, 107, 255, 0.35);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .process-step::before {
            counter-increment: process;
            content: "0" counter(process);
            position: absolute;
            top: -20px;
            left: 24px;
            font-size: 36px;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            opacity: 0.35;
        }

        .process-step__title {
            font-size: 20px;
            font-weight: 700;
            margin-top: 12px;
            margin-bottom: 8px;
        }

        .process-step__text {
            color: var(--color-text-dim);
            font-size: 15px;
            line-height: 1.7;
        }

        /* Feature split */
        .split-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(32px, 5vw, 64px);
            align-items: center;
        }

        .split-section__media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 320px;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
        }

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

        .split-section__media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(11, 15, 26, 0.6));
        }

        .split-section__body {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .split-section__title {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 700;
            line-height: 1.3;
        }

        .split-section__list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .split-list-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .split-list-item__icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(91, 140, 255, 0.12);
            border: 1px solid rgba(91, 140, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .split-list-item__title {
            font-weight: 600;
            margin-bottom: 2px;
        }

        .split-list-item__text {
            color: var(--color-text-dim);
            font-size: 15px;
            line-height: 1.6;
        }

        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: clamp(16px, 2vw, 24px);
            margin-top: clamp(32px, 5vw, 56px);
        }

        .stat-card {
            text-align: center;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            transition: var(--transition);
        }

        .stat-card:hover {
            border-color: rgba(91, 140, 255, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }

        .stat-card__number {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .stat-card__label {
            color: var(--color-text-dim);
            font-size: 14px;
            margin-top: 6px;
        }

        /* FAQ */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(91, 140, 255, 0.2);
        }

        .faq-item details {
            padding: 0;
        }

        .faq-item summary {
            padding: 24px 28px;
            font-size: 17px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            user-select: none;
            transition: var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "+";
            font-size: 24px;
            color: var(--color-accent);
            font-weight: 300;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item details[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item__body {
            padding: 0 28px 24px;
            color: var(--color-text-dim);
            line-height: 1.8;
            font-size: 15px;
            border-top: 1px solid var(--color-border);
            margin: 0 28px;
            padding: 20px 0 24px;
        }

        /* CTA */
        .cta-panel {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-lg);
            padding: clamp(40px, 5vw, 64px);
            text-align: center;
            background: linear-gradient(135deg, rgba(91, 140, 255, 0.12), rgba(157, 107, 255, 0.12)), url('/assets/images/backpic/back-2.png') center/cover;
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(11, 15, 26, 0.55);
            z-index: 0;
        }

        .cta-panel__content {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }

        .cta-panel__title {
            font-size: clamp(28px, 3.4vw, 44px);
            font-weight: 800;
            line-height: 1.3;
        }

        .cta-panel__text {
            color: var(--color-text-dim);
            font-size: 16px;
            max-width: 540px;
        }

        .cta-panel__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-top: 8px;
        }

        /* Footer */
        .site-footer {
            background: var(--color-bg);
            border-top: 1px solid var(--color-border);
            padding: clamp(48px, 6vw, 72px) 0 32px;
        }

        .footer__grid {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: space-between;
            margin-bottom: 48px;
        }

        .footer__brand {
            max-width: 360px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .footer__logo {
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer__logo-mark {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-accent);
            box-shadow: 0 0 12px var(--color-accent);
        }

        .footer__desc {
            color: var(--color-text-dim);
            font-size: 15px;
            line-height: 1.7;
        }

        .footer__nav {
            display: flex;
            gap: 48px;
        }

        .footer__nav-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer__nav-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer__nav-link {
            color: var(--color-text-dim);
            font-size: 15px;
            transition: var(--transition);
        }

        .footer__nav-link:hover {
            color: var(--color-accent);
        }

        .footer__bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
            align-items: center;
            color: var(--color-text-dim);
            font-size: 14px;
        }

        .footer__domain {
            font-family: monospace;
            font-size: 13px;
            opacity: 0.8;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .category-card__media {
                width: 38%;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }

            .header__nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(11, 15, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 28px 32px;
                gap: 20px;
                border-bottom: 1px solid var(--color-border);
                opacity: 0;
                visibility: hidden;
                transform: translateY(-16px);
                transition: var(--transition);
                z-index: 99;
            }

            .header__nav.is-open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }

            .header__nav-link {
                font-size: 16px;
                width: 100%;
            }

            .header__cta {
                margin-left: 0;
                width: 100%;
            }

            .header__cta .btn {
                width: 100%;
            }

            .header__hamburger {
                display: flex;
            }

            .news-list {
                grid-template-columns: 1fr;
            }

            .split-section {
                grid-template-columns: 1fr;
            }

            .split-section__media {
                min-height: 260px;
            }

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

            .category-card {
                flex-direction: column;
                min-height: auto;
            }

            .category-card__media {
                width: 100%;
                height: 220px;
            }

            .category-card__media::after {
                background: linear-gradient(180deg, transparent, var(--color-surface));
            }

            .footer__nav {
                flex-direction: column;
                gap: 24px;
            }

            .footer__grid {
                flex-direction: column;
            }

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

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

        @media (max-width: 520px) {
            .hero__actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero__actions .btn {
                width: 100%;
            }

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

            .section__head--center {
                align-items: flex-start;
                text-align: left;
            }

            .section__head--center .section__subtitle {
                margin: 0;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #7c5cff;
            --primary-deep: #5a36f0;
            --primary-soft: rgba(124, 92, 255, 0.16);
            --accent: #00e5c7;
            --accent-soft: rgba(0, 229, 199, 0.14);
            --bg: #0b0f1a;
            --bg-2: #111726;
            --card: #161d2e;
            --card-hover: #1a2338;
            --text: #eef0f8;
            --text-2: #99a2bc;
            --text-3: #6d7695;
            --border: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.14);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 18px 44px rgba(0, 0, 0, 0.34);
            --shadow-hover: 0 26px 60px rgba(0, 0, 0, 0.44);
            --space-section: 96px;
            --font: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans GB", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 28px;
        }

        .section {
            padding: var(--space-section) 0;
        }

        .section--alt {
            background: var(--bg-2);
        }

        .section__head {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section__head--center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section__tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            letter-spacing: 0.08em;
            color: var(--accent);
            background: var(--accent-soft);
            border: 1px solid rgba(0, 229, 199, 0.22);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 18px;
            font-weight: 500;
        }

        .section__tag::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
        }

        .section__title {
            font-size: clamp(30px, 4.2vw, 44px);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        .section__subtitle {
            font-size: 17px;
            color: var(--text-2);
            margin-top: 14px;
            line-height: 1.8;
        }

        /* ---- Buttons ---- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 13px 28px;
            border-radius: 999px;
            border: 1px solid transparent;
            transition: all 0.28s ease;
            cursor: pointer;
            white-space: nowrap;
            line-height: 1.2;
        }

        .btn--primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
            color: #fff;
            box-shadow: 0 10px 30px rgba(124, 92, 255, 0.32);
        }

        .btn--primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 16px 38px rgba(124, 92, 255, 0.45);
        }

        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 6px 18px rgba(124, 92, 255, 0.3);
        }

        .btn--outline {
            border-color: var(--border-strong);
            color: var(--text);
            background: rgba(255, 255, 255, 0.02);
        }

        .btn--outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .btn--sm {
            padding: 9px 20px;
            font-size: 13px;
            border-radius: 999px;
        }

        .btn--lg {
            padding: 16px 40px;
            font-size: 16px;
        }

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

        /* ---- Header ---- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(11, 15, 26, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }

        .header__bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .header__logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text);
            flex-shrink: 0;
        }

        .header__logo-mark {
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: inline-block;
            position: relative;
            box-shadow: 0 6px 20px rgba(124, 92, 255, 0.5);
        }

        .header__logo-mark::after {
            content: "";
            position: absolute;
            inset: 8px;
            border-radius: 5px;
            background: var(--bg);
            opacity: 0.85;
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .header__nav-link {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-2);
            padding: 8px 16px;
            border-radius: 8px;
            transition: color 0.25s ease, background 0.25s ease;
        }

        .header__nav-link:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.04);
        }

        .header__nav-link.is-active {
            color: var(--text);
            font-weight: 600;
        }

        .header__nav-link.is-active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .header__cta {
            margin-left: 14px;
        }

        .header__toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.02);
        }

        .header__toggle span {
            width: 18px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .header__toggle.is-open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .header__toggle.is-open span:nth-child(2) {
            opacity: 0;
        }

        .header__toggle.is-open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ---- Page Hero ---- */
        .page-hero {
            position: relative;
            padding: 184px 0 96px;
            background: linear-gradient(180deg, rgba(11, 15, 26, 0.6) 0%, rgba(11, 15, 26, 0.92) 100%), url('/assets/images/backpic/back-1.png') center top / cover no-repeat;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: 60px;
            right: -140px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(124, 92, 255, 0.24) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-3);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            color: var(--text-2);
            transition: color 0.2s;
        }

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

        .breadcrumb__sep {
            opacity: 0.5;
        }

        .page-hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-soft);
            border: 1px solid rgba(124, 92, 255, 0.3);
            color: #cbbfff;
            font-size: 13px;
            font-weight: 500;
            padding: 7px 16px;
            border-radius: 999px;
            margin-bottom: 22px;
        }

        .page-hero__badge i {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
            box-shadow: 0 0 12px var(--accent);
        }

        .page-hero h1 {
            font-size: clamp(34px, 5.6vw, 56px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 30%, #cfc7ff 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero__desc {
            max-width: 640px;
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-2);
            margin-bottom: 36px;
        }

        .page-hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 52px;
        }

        .hero-metrics__item {
            background: rgba(22, 29, 46, 0.72);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 14px 22px;
            backdrop-filter: blur(8px);
        }

        .hero-metrics__num {
            font-size: 22px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        .hero-metrics__label {
            font-size: 13px;
            color: var(--text-2);
            margin-top: 2px;
        }

        /* ---- Overview ---- */
        .overview {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 64px;
            align-items: center;
        }

        .overview__media {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            position: relative;
        }

        .overview__media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .overview__media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(11, 15, 26, 0.65) 100%);
            pointer-events: none;
        }

        .overview__media-caption {
            position: absolute;
            bottom: 18px;
            left: 20px;
            z-index: 2;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.86);
            background: rgba(11, 15, 26, 0.66);
            backdrop-filter: blur(6px);
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        .overview__content h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .overview__content p {
            color: var(--text-2);
            margin-bottom: 18px;
            line-height: 1.8;
        }

        .overview__list {
            margin-top: 24px;
            display: grid;
            gap: 14px;
        }

        .overview__list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text);
            font-size: 15px;
        }

        .overview__list li::before {
            content: "✓";
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 229, 199, 0.25);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            margin-top: 2px;
        }

        /* ---- Entry Cards ---- */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .entry-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 26px;
            transition: all 0.32s ease;
            position: relative;
            overflow: hidden;
        }

        .entry-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s;
        }

        .entry-card:hover {
            background: var(--card-hover);
            border-color: var(--border-strong);
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .entry-card:hover::before {
            opacity: 1;
        }

        .entry-card__icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 18px;
            background: var(--primary-soft);
            color: var(--primary);
            border: 1px solid rgba(124, 92, 255, 0.25);
        }

        .entry-card:nth-child(2) .entry-card__icon {
            background: var(--accent-soft);
            color: var(--accent);
            border-color: rgba(0, 229, 199, 0.25);
        }

        .entry-card:nth-child(3) .entry-card__icon {
            background: rgba(255, 184, 0, 0.14);
            color: #ffb800;
            border-color: rgba(255, 184, 0, 0.25);
        }

        .entry-card:nth-child(4) .entry-card__icon {
            background: rgba(255, 92, 158, 0.14);
            color: #ff5c9e;
            border-color: rgba(255, 92, 158, 0.25);
        }

        .entry-card__title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .entry-card__desc {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.75;
        }

        .entry-card__tag {
            display: inline-block;
            margin-top: 16px;
            font-size: 12px;
            color: var(--text-3);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            padding: 4px 12px;
            border-radius: 999px;
        }

        /* ---- Steps ---- */
        .steps-wrap {
            background: var(--bg-2);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
        }

        .steps-wrap::before {
            content: "";
            position: absolute;
            top: -80px;
            left: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(124, 92, 255, 0.16) 0%, transparent 70%);
            pointer-events: none;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 2;
        }

        .step-item {
            position: relative;
            text-align: center;
        }

        .step-item:not(:last-child)::after {
            content: "";
            position: absolute;
            top: 28px;
            right: -16px;
            width: 32px;
            height: 1px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }

        .step-item__num {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: var(--card);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            box-shadow: 0 0 30px rgba(124, 92, 255, 0.18);
        }

        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
        }

        /* ---- Content List ---- */
        .content-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .content-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all 0.32s ease;
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-strong);
        }

        .content-card__media {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .content-card__media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .content-card:hover .content-card__media img {
            transform: scale(1.05);
        }

        .content-card__media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 26, 0) 50%, rgba(11, 15, 26, 0.55) 100%);
        }

        .content-card__tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            font-size: 12px;
            background: rgba(11, 15, 26, 0.78);
            backdrop-filter: blur(6px);
            color: var(--accent);
            border: 1px solid rgba(0, 229, 199, 0.25);
            padding: 4px 12px;
            border-radius: 999px;
        }

        .content-card__body {
            padding: 22px 22px 26px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .content-card__title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.55;
            margin-bottom: 10px;
            transition: color 0.25s;
        }

        .content-card:hover .content-card__title {
            color: #cdc0ff;
        }

        .content-card__excerpt {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .content-card__meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-3);
        }

        .content-card__meta .dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--text-3);
        }

        /* ---- FAQ ---- */
        .faq-wrap {
            max-width: 880px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .faq-item.is-open {
            border-color: rgba(124, 92, 255, 0.35);
            box-shadow: 0 12px 35px rgba(0, 0, 0, 0.22);
        }

        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 22px 26px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: background 0.25s;
        }

        .faq-item__question:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-item__icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            background: var(--primary-soft);
            color: var(--primary);
            transition: transform 0.3s ease, background 0.3s ease;
        }

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

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 26px;
            color: var(--text-2);
            font-size: 14px;
            line-height: 1.8;
        }

        .faq-item.is-open .faq-item__answer {
            max-height: 300px;
            padding: 0 26px 26px;
        }

        /* ---- CTA ---- */
        .cta-section {
            padding: 0 0 var(--space-section);
        }

        .cta-panel {
            position: relative;
            background: linear-gradient(135deg, rgba(124, 92, 255, 0.18) 0%, rgba(0, 229, 199, 0.1) 100%), var(--card);
            border: 1px solid rgba(124, 92, 255, 0.3);
            border-radius: 24px;
            padding: 64px 56px;
            text-align: center;
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(0, 229, 199, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-panel p {
            color: var(--text-2);
            max-width: 560px;
            margin: 0 auto 32px;
            position: relative;
        }

        .cta-panel .btn {
            position: relative;
        }

        /* ---- Footer ---- */
        .site-footer {
            border-top: 1px solid var(--border);
            background: var(--bg-2);
            padding: 64px 0 0;
        }

        .footer__grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 56px;
            padding-bottom: 48px;
        }

        .footer__logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer__logo-mark {
            width: 30px;
            height: 30px;
            border-radius: 9px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: inline-block;
            position: relative;
        }

        .footer__logo-mark::after {
            content: "";
            position: absolute;
            inset: 7px;
            border-radius: 4px;
            background: var(--bg-2);
            opacity: 0.8;
        }

        .footer__desc {
            font-size: 14px;
            color: var(--text-2);
            max-width: 340px;
            line-height: 1.8;
        }

        .footer__nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .footer__nav-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .footer__nav-list {
            display: grid;
            gap: 10px;
        }

        .footer__nav-link {
            font-size: 14px;
            color: var(--text-2);
            transition: color 0.25s;
            width: fit-content;
        }

        .footer__nav-link:hover {
            color: var(--accent);
        }

        .footer__bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-3);
        }

        /* ---- Responsive ---- */
        @media (max-width: 1024px) {
            .entry-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .content-wrap {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 24px;
            }

            .step-item:nth-child(2)::after {
                display: none;
            }

            .overview {
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 70px;
            }

            .container {
                padding: 0 20px;
            }

            .header__bar {
                height: 64px;
            }

            .header__nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 26, 0.97);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: all 0.32s ease;
            }

            .header__nav.is-open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .header__nav-link {
                padding: 13px 16px;
                font-size: 15px;
            }

            .header__nav-link.is-active::after {
                left: 16px;
                right: 16px;
                bottom: 8px;
            }

            .header__cta {
                margin-left: 0;
                margin-top: 12px;
                text-align: center;
            }

            .header__cta .btn {
                width: 100%;
            }

            .header__toggle {
                display: flex;
            }

            .page-hero {
                padding: 150px 0 72px;
            }

            .hero-metrics {
                gap: 10px;
            }

            .hero-metrics__item {
                padding: 12px 16px;
            }

            .overview {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .overview__media img {
                max-height: 320px;
            }

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

            .content-wrap {
                grid-template-columns: 1fr;
            }

            .steps-wrap {
                padding: 36px 24px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .step-item:not(:last-child)::after {
                display: none;
            }

            .faq-item__question {
                padding: 18px 20px;
                font-size: 14px;
            }

            .faq-item.is-open .faq-item__answer {
                padding: 0 20px 20px;
            }

            .cta-panel {
                padding: 40px 24px;
                border-radius: 18px;
            }

            .footer__grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

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

            .section--alt .container {
                padding: 0 20px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --space-section: 60px;
            }

            body {
                font-size: 15px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .page-hero__desc {
                font-size: 15px;
            }

            .hero-metrics__item {
                flex: 1 1 100%;
            }

            .section__title {
                font-size: 26px;
            }

            .overview__content h2 {
                font-size: 24px;
            }

            .btn--lg {
                padding: 14px 30px;
                font-size: 15px;
            }

            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }

            .footer__nav {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .content-card__media {
                height: 160px;
            }
        }

/* roulang page: article */
:root {
    --bg: #070b14;
    --bg-soft: #0d1424;
    --card: #0f172a;
    --card-hover: #141f36;
    --border: rgba(148, 163, 184, 0.12);
    --text: #e2e8f0;
    --text-weak: #94a3b8;
    --text-strong: #ffffff;
    --primary: #6366f1;
    --primary-2: #8b5cf6;
    --accent: #22d3ee;
    --accent-2: #f472b6;
    --success: #34d399;
    --danger: #f43f5e;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
    --shadow-card: 0 12px 44px rgba(0, 0, 0, 0.26);
    --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container: 1200px;
    --gap: 24px;
    --transition: 0.25s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

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

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

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

input, textarea {
    font-family: inherit;
    font-size: 14px;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

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

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(7, 11, 20, 0.82);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-bottom: 1px solid var(--border);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}

.header__logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-strong);
    letter-spacing: 0.02em;
    white-space: nowrap;
    transition: opacity var(--transition);
}

.header__logo:hover {
    opacity: 0.86;
}

.header__logo-mark {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 0 14px rgba(99, 102, 241, 0.8);
    flex-shrink: 0;
}

.header__nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.header__nav-link {
    position: relative;
    font-size: 14px;
    color: var(--text-weak);
    padding: 8px 2px;
    transition: color var(--transition);
    white-space: nowrap;
}

.header__nav-link:hover {
    color: var(--text-strong);
}

.header__nav-link.is-active {
    color: var(--text-strong);
}

.header__nav-link.is-active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

.header__cta {
    margin-left: 8px;
}

.header__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: rgba(15, 23, 42, 0.6);
    transition: border-color var(--transition);
}

.header__toggle:hover {
    border-color: rgba(99, 102, 241, 0.5);
}

.header__toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.header__toggle.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.header__toggle.is-active span:nth-child(2) {
    opacity: 0;
}

.header__toggle.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: all var(--transition);
    cursor: pointer;
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #ffffff;
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.35);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 42px rgba(99, 102, 241, 0.48);
}

.btn--primary:active {
    transform: translateY(0);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.32);
}

.btn--ghost {
    background: transparent;
    border-color: rgba(148, 163, 184, 0.28);
    color: var(--text-strong);
}

.btn--ghost:hover {
    border-color: rgba(34, 211, 238, 0.6);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn--sm {
    padding: 9px 18px;
    font-size: 13px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-weak);
    border: 1px solid var(--border);
}

.badge--accent {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.18));
    color: #c7d2fe;
    border-color: rgba(99, 102, 241, 0.35);
}

.section-header {
    max-width: 720px;
    margin-bottom: 48px;
}

.section__eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--accent);
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(34, 211, 238, 0.1);
    margin-bottom: 16px;
}

.section__title {
    font-size: 36px;
    line-height: 1.22;
    font-weight: 700;
    color: var(--text-strong);
    letter-spacing: -0.02em;
}

.section__desc {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-weak);
    margin-top: 12px;
}

.section__empty {
    padding: 32px;
    text-align: center;
    color: var(--text-weak);
    background: rgba(148, 163, 184, 0.06);
    border-radius: var(--radius);
    border: 1px dashed var(--border);
    font-size: 14px;
}

.article-hero {
    position: relative;
    padding: 170px 0 110px;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--border);
}

.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(7, 11, 20, 0.86) 0%, rgba(7, 11, 20, 0.62) 45%, rgba(7, 11, 20, 0.94) 100%);
}

.article-hero .container {
    position: relative;
    z-index: 1;
}

.article-hero__breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-weak);
    margin-bottom: 28px;
}

.article-hero__breadcrumb a {
    color: var(--text-weak);
    transition: color var(--transition);
}

.article-hero__breadcrumb a:hover {
    color: var(--accent);
}

.article-hero__breadcrumb .sep {
    color: rgba(148, 163, 184, 0.4);
}

.article-hero__title {
    font-size: 42px;
    line-height: 1.25;
    font-weight: 800;
    color: var(--text-strong);
    letter-spacing: -0.02em;
    max-width: 860px;
    margin-bottom: 20px;
}

.article-hero__meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.article-hero__date {
    font-size: 14px;
    color: var(--text-weak);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.article-hero__date::before {
    content: '';
    display: inline-block;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.6);
}

.article-main {
    padding: 72px 0 80px;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 48px;
    align-items: start;
}

.article-layout__main {
    min-width: 0;
}

.article__body {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text);
}

.article__body h2 {
    font-size: 28px;
    line-height: 1.3;
    color: var(--text-strong);
    margin-top: 40px;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.article__body h3 {
    font-size: 22px;
    line-height: 1.35;
    color: var(--text-strong);
    margin-top: 32px;
    margin-bottom: 12px;
}

.article__body p {
    margin-bottom: 20px;
}

.article__body ul,
.article__body ol {
    margin: 0 0 24px;
    padding-left: 26px;
}

.article__body li {
    margin-bottom: 8px;
}

.article__body blockquote {
    border-left: 3px solid var(--primary);
    background: rgba(99, 102, 241, 0.08);
    padding: 18px 24px;
    border-radius: 0 14px 14px 0;
    margin: 28px 0;
    color: var(--text-weak);
}

.article__body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: opacity var(--transition);
}

.article__body a:hover {
    opacity: 0.8;
}

.article__body img {
    max-width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    margin: 28px 0;
}

.article__body code {
    background: rgba(148, 163, 184, 0.12);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
    font-family: 'SFMono-Regular', Consolas, monospace;
}

.article__empty {
    padding: 72px 32px;
    text-align: center;
    background: rgba(148, 163, 184, 0.05);
    border: 1px dashed var(--border);
    border-radius: 20px;
}

.article__empty p {
    font-size: 20px;
    color: var(--text-strong);
    margin-bottom: 24px;
}

.article__foot {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
    flex-wrap: wrap;
}

.article__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.article__meta {
    display: flex;
    gap: 18px;
    font-size: 13px;
    color: var(--text-weak);
}

.side-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 28px;
    margin-bottom: 24px;
    transition: border-color var(--transition);
    position: relative;
    overflow: hidden;
}

.side-card:hover {
    border-color: rgba(99, 102, 241, 0.35);
}

.side-card--brand {
    background-image: url('/assets/images/coverpic/cover-2.png');
    background-size: cover;
    background-position: center;
    border: none;
}

.side-card--brand::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(7, 11, 20, 0.35) 0%, rgba(13, 20, 36, 0.94) 88%);
    pointer-events: none;
}

.side-card--brand > * {
    position: relative;
    z-index: 1;
}

.side-card__icon {
    width: 44px;
    height: 44px;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 16px;
    box-shadow: 0 8px 26px rgba(99, 102, 241, 0.4);
}

.side-card h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-strong);
    margin-bottom: 10px;
}

.side-card p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-weak);
    margin-bottom: 18px;
}

.side-card__title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-strong);
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
    position: relative;
}

.side-card__title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 32px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.side-links {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.side-links__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border-radius: 12px;
    background: rgba(148, 163, 184, 0.06);
    border: 1px solid transparent;
    font-size: 14px;
    color: var(--text);
    transition: all var(--transition);
}

.side-links__item:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.25);
    color: var(--text-strong);
    transform: translateX(4px);
}

.side-links__arrow {
    color: var(--accent);
    opacity: 0;
    transition: opacity var(--transition);
}

.side-links__item:hover .side-links__arrow {
    opacity: 1;
}

.related-section {
    padding: 80px 0;
    border-top: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(13, 20, 36, 0.4), rgba(7, 11, 20, 0));
}

.related__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.related__card {
    position: relative;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    display: block;
    overflow: hidden;
    transition: all var(--transition);
}

.related__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: opacity var(--transition);
}

.related__card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.35);
    box-shadow: var(--shadow-card);
    background: var(--card-hover);
}

.related__card:hover::before {
    opacity: 1;
}

.related__tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(34, 211, 238, 0.1);
    border-radius: 999px;
    padding: 4px 12px;
    margin-bottom: 14px;
}

.related__card h4 {
    font-size: 17px;
    line-height: 1.4;
    color: var(--text-strong);
    margin-bottom: 10px;
    font-weight: 700;
}

.related__card p {
    font-size: 14px;
    line-height: 1.65;
    color: var(--text-weak);
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related__date {
    font-size: 13px;
    color: var(--text-weak);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.related__date::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

.faq-section {
    padding: 80px 0;
    border-top: 1px solid var(--border);
}

.faq__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.faq__item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all var(--transition);
}

.faq__item:hover {
    border-color: rgba(99, 102, 241, 0.35);
    transform: translateY(-2px);
}

.faq__question {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-strong);
    margin-bottom: 10px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.faq__question::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(34, 211, 238, 0.2));
    color: var(--accent);
    font-size: 13px;
    font-weight: 800;
}

.faq__answer {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-weak);
    padding-left: 38px;
}

.cta-section {
    padding: 0 0 88px;
    border-top: 1px solid var(--border);
    padding-top: 80px;
}

.cta__inner {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.22), rgba(34, 211, 238, 0.1)), var(--card);
    border: 1px solid rgba(99, 102, 241, 0.32);
    border-radius: 24px;
    padding: 64px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta__inner::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.16), transparent 68%);
    pointer-events: none;
}

.cta__inner h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-strong);
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.cta__inner p {
    font-size: 16px;
    color: var(--text-weak);
    margin-bottom: 32px;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
}

.cta__actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.site-footer {
    border-top: 1px solid var(--border);
    background: var(--bg-soft);
    padding: 64px 0 32px;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer__logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-strong);
    transition: opacity var(--transition);
}

.footer__logo:hover {
    opacity: 0.86;
}

.footer__logo-mark {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 0 14px rgba(99, 102, 241, 0.8);
    flex-shrink: 0;
}

.footer__desc {
    margin-top: 16px;
    max-width: 420px;
    color: var(--text-weak);
    line-height: 1.7;
    font-size: 14px;
}

.footer__nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.footer__nav-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-strong);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.footer__nav-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer__nav-link {
    color: var(--text-weak);
    font-size: 14px;
    transition: color var(--transition);
    width: fit-content;
}

.footer__nav-link:hover {
    color: var(--accent);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
    padding-top: 24px;
    font-size: 13px;
    color: var(--text-weak);
    gap: 12px;
    flex-wrap: wrap;
}

.footer__domain {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12px;
    color: rgba(148, 163, 184, 0.6);
    letter-spacing: 0.04em;
}

@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .article-layout__side {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .side-card {
        margin-bottom: 0;
    }

    .related__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header__toggle {
        display: flex;
    }

    .header__nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: rgba(13, 20, 36, 0.98);
        border-bottom: 1px solid var(--border);
        padding: 16px 24px 24px;
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .header__nav.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .header__nav-link {
        padding: 14px 0;
        border-bottom: 1px solid var(--border);
        font-size: 15px;
    }

    .header__nav-link.is-active::after {
        left: 0;
        right: auto;
        width: 32px;
    }

    .header__cta {
        margin: 16px 0 0;
    }

    .header__cta .btn {
        width: 100%;
    }

    .article-hero {
        padding: 140px 0 70px;
    }

    .article-hero__title {
        font-size: 30px;
    }

    .article-layout__side {
        grid-template-columns: 1fr;
    }

    .section__title {
        font-size: 28px;
    }

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

    .cta__inner {
        padding: 44px 24px;
    }

    .cta__inner h2 {
        font-size: 26px;
    }

    .footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer__nav {
        gap: 24px;
    }

    .article__foot {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 520px) {
    .container {
        padding: 0 18px;
    }

    .header__inner {
        height: 64px;
    }

    .header__nav {
        top: 64px;
    }

    .header__logo {
        font-size: 16px;
    }

    .article-hero__title {
        font-size: 26px;
    }

    .article__body {
        font-size: 15px;
    }

    .article__body h2 {
        font-size: 23px;
    }

    .article__body h3 {
        font-size: 19px;
    }

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

    .faq__item {
        padding: 22px;
    }

    .cta__actions {
        flex-direction: column;
        width: 100%;
    }

    .cta__actions .btn {
        width: 100%;
    }

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

    .footer__bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* roulang page: category2 */
:root {
            --primary: #00e5ff;
            --primary-deep: #00b8d4;
            --secondary: #7c3aed;
            --accent: #ff3d71;
            --bg: #0a0e17;
            --bg-soft: #111827;
            --bg-card: #141c2e;
            --text: #e6edf3;
            --text-weak: #8b98a9;
            --border: rgba(255, 255, 255, 0.08);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 40px rgba(0, 229, 255, 0.12);
            --transition: all 0.3s ease;
            --container-w: 1200px;
            --section-pad: 110px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 999px;
            transition: var(--transition);
            border: 1px solid transparent;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn--primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #04121a;
            box-shadow: 0 8px 30px rgba(0, 229, 255, 0.25);
        }
        .btn--primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(0, 229, 255, 0.4);
        }
        .btn--ghost {
            border-color: var(--border);
            color: var(--text);
            background: rgba(255, 255, 255, 0.03);
        }
        .btn--ghost:hover {
            border-color: rgba(0, 229, 255, 0.4);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn--sm {
            padding: 9px 22px;
            font-size: 14px;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(0, 229, 255, 0.5);
            outline-offset: 3px;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(10, 14, 23, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }
        .header__logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 21px;
            font-weight: 700;
            letter-spacing: 0.5px;
            color: var(--text);
        }
        .header__logo-mark {
            width: 14px;
            height: 14px;
            border-radius: 5px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.55);
            position: relative;
        }
        .header__logo-mark::after {
            content: "";
            position: absolute;
            inset: -4px;
            border-radius: 7px;
            border: 1px solid rgba(0, 229, 255, 0.3);
            animation: pulse 2.4s ease-in-out infinite;
        }
        @keyframes pulse {
            0%, 100% { transform: scale(0.9); opacity: 0.4; }
            50% { transform: scale(1.3); opacity: 0.8; }
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 34px;
        }
        .header__nav-link {
            font-size: 15px;
            color: var(--text-weak);
            font-weight: 500;
            padding: 8px 0;
            position: relative;
        }
        .header__nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        .header__nav-link:hover,
        .header__nav-link.is-active {
            color: var(--text);
        }
        .header__nav-link:hover::after,
        .header__nav-link.is-active::after {
            width: 100%;
        }
        .header__cta {
            margin-left: 10px;
        }
        .header__burger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border);
        }
        .header__burger span {
            width: 18px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .header__burger.is-open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .header__burger.is-open span:nth-child(2) {
            opacity: 0;
        }
        .header__burger.is-open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 190px 0 110px;
            background: url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
            border-bottom: 1px solid var(--border);
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 23, 0.55) 0%, rgba(10, 14, 23, 0.88) 100%);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            right: -120px;
            top: 40px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.25), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero__breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 28px;
        }
        .hero__breadcrumb a:hover {
            color: var(--primary);
        }
        .hero__breadcrumb .sep {
            opacity: 0.5;
        }
        .hero__title {
            font-size: clamp(40px, 6vw, 72px);
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -1px;
            background: linear-gradient(90deg, #fff, #c9f9ff 60%, var(--primary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 22px;
        }
        .hero__desc {
            font-size: 18px;
            color: rgba(230, 237, 243, 0.85);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 38px;
        }
        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 44px;
        }
        .hero__badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-weak);
            backdrop-filter: blur(6px);
        }
        .hero__badge i {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 10px var(--primary);
        }

        /* ===== Section ===== */
        .section {
            padding: var(--section-pad) 0;
        }
        .section--soft {
            background: var(--bg-soft);
        }
        .section__head {
            max-width: 760px;
            margin: 0 auto 64px;
            text-align: center;
        }
        .section__tag {
            display: inline-block;
            font-size: 13px;
            letter-spacing: 3px;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .section__title {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section__desc {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.8;
        }

        /* ===== 核心概览 ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .overview-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .overview-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .overview-card:hover {
            transform: translateY(-8px);
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: var(--shadow), var(--shadow-glow);
        }
        .overview-card:hover::before {
            opacity: 1;
        }
        .overview-card__icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            background: rgba(0, 229, 255, 0.1);
            color: var(--primary);
            margin-bottom: 22px;
            border: 1px solid rgba(0, 229, 255, 0.15);
        }
        .overview-card__title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .overview-card__text {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.75;
        }

        /* ===== 流程 ===== */
        .flow-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
        }
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            position: relative;
        }
        .flow-step {
            text-align: center;
            padding: 0 20px;
            position: relative;
        }
        .flow-step__num {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(124, 58, 237, 0.15));
            border: 1px solid rgba(0, 229, 255, 0.3);
            color: var(--primary);
            position: relative;
            z-index: 2;
        }
        .flow-step__title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .flow-step__desc {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }
        .flow-step:not(:last-child)::after {
            content: "";
            position: absolute;
            top: 28px;
            left: calc(50% + 42px);
            width: calc(100% - 84px);
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 229, 255, 0.3), rgba(124, 58, 237, 0.3));
        }

        /* ===== 模式卡片 ===== */
        .modes-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .mode-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .mode-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
            border-color: rgba(0, 229, 255, 0.28);
        }
        .mode-card__cover {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .mode-card__cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .mode-card:hover .mode-card__cover img {
            transform: scale(1.06);
        }
        .mode-card__cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(20, 28, 46, 0.9) 100%);
        }
        .mode-card__body {
            padding: 26px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .mode-card__badge {
            display: inline-flex;
            align-items: center;
            align-self: flex-start;
            font-size: 12px;
            color: var(--primary);
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.18);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .mode-card__title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .mode-card__desc {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
        }

        /* ===== 数据面板 ===== */
        .stats-panel {
            position: relative;
            background: url("/assets/images/backpic/back-1.png") center center / cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 72px 48px;
            overflow: hidden;
            border: 1px solid var(--border);
        }
        .stats-panel::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 14, 23, 0.92), rgba(20, 28, 46, 0.82));
        }
        .stats-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item__num {
            font-size: clamp(34px, 5vw, 52px);
            font-weight: 800;
            background: linear-gradient(180deg, #fff, var(--primary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }
        .stat-item__label {
            font-size: 14px;
            color: rgba(230, 237, 243, 0.75);
            margin-top: 10px;
            letter-spacing: 1px;
        }
        .stat-item + .stat-item {
            border-left: 1px solid var(--border);
        }

        /* ===== 技巧区块 ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .tips-item {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            transition: var(--transition);
        }
        .tips-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
            transform: translateX(6px);
        }
        .tips-item__index {
            font-size: 15px;
            font-weight: 800;
            color: var(--primary);
            background: rgba(0, 229, 255, 0.1);
            border-radius: 10px;
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .tips-item__title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .tips-item__text {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }
        .tips-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            position: relative;
        }
        .tips-image img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }
        .tips-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10, 14, 23, 0.5));
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.is-open {
            border-color: rgba(0, 229, 255, 0.25);
        }
        .faq-item__q {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 24px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
        }
        .faq-item__icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-weak);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.is-open .faq-item__icon {
            transform: rotate(45deg);
            border-color: var(--primary);
            color: var(--primary);
        }
        .faq-item__a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-item__a-inner {
            padding: 0 28px 26px;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 40px 0 110px;
        }
        .cta-box {
            position: relative;
            background: url("/assets/images/backpic/back-3.png") center center / cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 72px 48px;
            text-align: center;
            overflow: hidden;
            border: 1px solid var(--border);
        }
        .cta-box::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.85), rgba(20, 28, 46, 0.75));
        }
        .cta-box .container {
            position: relative;
            z-index: 2;
        }
        .cta-box__title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-box__desc {
            font-size: 16px;
            color: rgba(230, 237, 243, 0.8);
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .cta-box__actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding: 60px 0 32px;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 1.2fr 2fr;
            gap: 60px;
            margin-bottom: 44px;
        }
        .footer__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer__logo-mark {
            width: 13px;
            height: 13px;
            border-radius: 5px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            box-shadow: 0 0 14px rgba(0, 229, 255, 0.5);
        }
        .footer__desc {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer__nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .footer__nav-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: 1px;
        }
        .footer__nav-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer__nav-link {
            font-size: 14px;
            color: var(--text-weak);
        }
        .footer__nav-link:hover {
            color: var(--primary);
        }
        .footer__bottom {
            border-top: 1px solid var(--border);
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-weak);
        }
        .footer__domain {
            letter-spacing: 1px;
        }

        /* ===== 动画 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .reveal.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 80px;
            }
            .overview-grid,
            .modes-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 20px;
            }
            .flow-step:not(:last-child)::after {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 20px;
            }
            .stat-item:nth-child(3) {
                border-left: none;
            }
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .header__nav {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.97);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
                padding: 20px 28px 28px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
            }
            .header__nav.is-open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .header__nav-link {
                width: 100%;
                padding: 12px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            }
            .header__nav-link::after {
                display: none;
            }
            .header__cta {
                margin: 16px 0 0;
                width: 100%;
            }
            .header__cta .btn {
                width: 100%;
            }
            .header__burger {
                display: flex;
            }
            .page-hero {
                padding: 150px 0 80px;
            }
            .hero__title {
                font-size: 42px;
            }
            .flow-wrap {
                padding: 40px 24px;
            }
            .flow-steps {
                grid-template-columns: 1fr 1fr;
            }
            .stats-panel {
                padding: 48px 24px;
            }
            .cta-box {
                padding: 50px 24px;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .footer__nav {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 20px;
            }
            .overview-grid,
            .modes-grid {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-item + .stat-item {
                border-left: none;
                border-top: 1px solid var(--border);
                padding-top: 24px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .tips-image img {
                height: 300px;
            }
            .hero__actions,
            .cta-box__actions {
                flex-direction: column;
            }
            .hero__actions .btn,
            .cta-box__actions .btn {
                width: 100%;
            }
            .section__head {
                margin-bottom: 40px;
            }
            .footer__nav {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
        }