/* roulang page: index */
:root {
            --bg-primary: #080F1F;
            --bg-secondary: #111E38;
            --brand-color: #4D7CFE;
            --accent-color: #00E0C6;
            --highlight: #FFB84D;
            --text-primary: #E8F1FF;
            --text-secondary: #8FA3C0;
            --text-muted: #5D7290;
            --border-color: rgba(255, 255, 255, 0.08);
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-border: rgba(255, 255, 255, 0.1);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 40px rgba(77, 124, 254, 0.15);
            --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --font-num: "DIN Alternate", "Roboto Mono", monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--brand-color);
            text-decoration: none;
            transition: color .25s;
        }

        a:hover {
            color: #7ba1ff;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 96px 0;
        }

        .section-head {
            max-width: 680px;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 16px;
            letter-spacing: -0.01em;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 17px;
            margin: 0;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 20px;
            background: rgba(0, 224, 198, 0.1);
            color: var(--accent-color);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 15px;
            min-height: 44px;
            padding: 12px 28px;
            border-radius: 10px;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
            line-height: 1.4;
            text-align: center;
            gap: 8px;
        }

        .btn-primary {
            background: var(--brand-color);
            color: #fff;
            box-shadow: 0 0 20px rgba(77, 124, 254, 0.4);
        }

        .btn-primary:hover {
            background: #6690ff;
            box-shadow: 0 0 30px rgba(77, 124, 254, 0.6);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }

        .btn-ghost:hover {
            background: rgba(77, 124, 254, 0.1);
            border-color: rgba(77, 124, 254, 0.4);
            color: #fff;
        }

        .btn-lg {
            padding: 15px 36px;
            font-size: 16px;
        }

        .btn-sm {
            padding: 9px 20px;
            font-size: 14px;
            min-height: 40px;
        }

        .text-link {
            color: var(--accent-color);
            font-weight: 600;
            border-bottom: 1px solid rgba(0, 224, 198, 0.3);
            padding-bottom: 2px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .25s;
        }

        .text-link:hover {
            color: #4dffd8;
            border-color: rgba(0, 224, 198, 0.8);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 70px;
            background: rgba(8, 15, 31, 0.85);
            -webkit-backdrop-filter: blur(16px);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header__inner {
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .header__left {
            display: flex;
            align-items: center;
            gap: 32px;
            flex-shrink: 1;
            min-width: 0;
        }

        .header__right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand:hover {
            color: var(--text-primary);
        }

        .brand__icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-color), var(--accent-color));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            box-shadow: 0 0 16px rgba(77, 124, 254, 0.4);
            flex-shrink: 0;
        }

        .main-nav ul {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
        }

        .nav-link {
            display: block;
            padding: 8px 16px;
            border-radius: 20px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: all .25s;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.is-active {
            color: var(--brand-color);
            background: rgba(77, 124, 254, 0.12);
            box-shadow: inset 0 0 0 1px rgba(77, 124, 254, 0.2);
        }

        .icon-btn {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all .25s;
        }

        .icon-btn:hover {
            color: var(--accent-color);
            border-color: rgba(0, 224, 198, 0.4);
            background: rgba(0, 224, 198, 0.08);
        }

        .hamburger {
            display: none;
            width: 44px;
            height: 44px;
            padding: 10px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 10px;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            cursor: pointer;
            transition: all .25s;
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--text-primary);
            transition: all .3s;
        }

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

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

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

        .mobile-menu {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            z-index: 99;
            background: rgba(8, 15, 31, 0.96);
            -webkit-backdrop-filter: blur(20px);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 24px 24px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }

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

        .mobile-menu__nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu__nav a {
            display: block;
            padding: 13px 16px;
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 500;
            transition: all .2s;
        }

        .mobile-menu__nav a:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-menu__nav a.is-active {
            color: var(--brand-color);
            background: rgba(77, 124, 254, 0.12);
        }

        .mobile-menu__nav a.mobile-menu__cta {
            margin-top: 8px;
            background: var(--brand-color);
            color: #fff;
            text-align: center;
            border-radius: 10px;
            box-shadow: 0 0 20px rgba(77, 124, 254, 0.3);
        }

        .hero {
            position: relative;
            min-height: calc(100vh - 70px);
            display: flex;
            align-items: center;
            padding: 120px 0 96px;
            background:
                radial-gradient(ellipse at 85% 15%, rgba(77, 124, 254, 0.22), transparent 55%),
                radial-gradient(ellipse at 10% 85%, rgba(0, 224, 198, 0.12), transparent 45%),
                linear-gradient(180deg, #080F1F 0%, #111E38 55%, #080F1F 100%);
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }

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

        .hero__eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--accent-color);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hero__eyebrow::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-color);
            box-shadow: 0 0 8px rgba(0, 224, 198, 0.8);
        }

        .hero h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.15;
            margin: 0 0 20px;
            letter-spacing: -0.02em;
            max-width: 520px;
        }

        .hero h1 .gradient-text {
            background: linear-gradient(90deg, #4D7CFE, #00E0C6);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero__lead {
            font-size: 18px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 460px;
            margin: 0 0 32px;
        }

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

        .hero__visual {
            position: relative;
            min-height: 440px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero__stage {
            position: relative;
            width: 100%;
            max-width: 520px;
        }

        .hero__img {
            width: 100%;
            border-radius: 24px;
            object-fit: cover;
            aspect-ratio: 4/3;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .hero__card {
            position: absolute;
            display: flex;
            align-items: center;
            gap: 14px;
            background: rgba(255, 255, 255, 0.1);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 14px;
            padding: 14px 18px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
            min-width: 220px;
        }

        .hero__card-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(77, 124, 254, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-color);
            font-size: 18px;
            flex-shrink: 0;
        }

        .hero__card strong {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .hero__card span {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        .hero__card--top {
            top: 20px;
            left: -24px;
            animation: floatCard 5s ease-in-out infinite;
        }

        .hero__card--bottom {
            bottom: 28px;
            right: -16px;
            animation: floatCard 6s ease-in-out infinite 1s;
        }

        @keyframes floatCard {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-8px);
            }
        }

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

        .pain-intro h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 16px;
        }

        .pain-intro p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .pain-cards {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .pain-card {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: var(--card-bg);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 26px 28px;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
        }

        .pain-card:hover {
            transform: translateY(-4px);
            border-color: rgba(77, 124, 254, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .pain-card__icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(77, 124, 254, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--brand-color);
            flex-shrink: 0;
        }

        .pain-card:nth-child(2) .pain-card__icon {
            background: rgba(255, 184, 77, 0.12);
            color: var(--highlight);
        }

        .pain-card h3 {
            margin: 0 0 6px;
            font-size: 18px;
            font-weight: 600;
        }

        .pain-card p {
            margin: 0;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
        }

        .solution-row {
            padding: 48px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .solution-row:last-of-type {
            border-bottom: none;
        }

        .solution-row img {
            width: 100%;
            border-radius: 20px;
            object-fit: cover;
            aspect-ratio: 16/11;
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: transform .4s ease, box-shadow .4s ease;
        }

        .solution-row img:hover {
            transform: scale(1.015);
            box-shadow: 0 20px 60px rgba(77, 124, 254, 0.2);
        }

        .solution-content {
            padding: 16px 8px;
        }

        .solution-content h3 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.35;
            margin: 12px 0 14px;
            color: var(--text-primary);
        }

        .solution-content p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .check-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 6px 0;
            color: var(--text-primary);
            font-size: 15px;
        }

        .check-list li i {
            color: var(--accent-color);
            margin-top: 4px;
            font-size: 14px;
        }

        .faq-wrap {
            max-width: 820px;
            padding-top: 24px;
        }

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

        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            transition: background .3s, border-color .3s;
        }

        .faq-item.is-open {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(77, 124, 254, 0.25);
        }

        .faq-item__question {
            width: 100%;
            padding: 18px 20px;
            background: transparent;
            border: none;
            text-align: left;
            font: inherit;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            border-radius: 12px;
        }

        .faq-item__icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-secondary);
            transition: all .3s;
            flex-shrink: 0;
        }

        .faq-item.is-open .faq-item__icon {
            transform: rotate(45deg);
            background: rgba(77, 124, 254, 0.2);
            color: var(--brand-color);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .3s ease;
        }

        .faq-item__answer p {
            padding: 0 20px 18px;
            margin: 0;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

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

        .stats-section {
            background: #0A1228;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat__num {
            font-family: var(--font-num);
            font-size: 48px;
            font-weight: 700;
            color: var(--accent-color);
            line-height: 1.2;
            text-shadow: 0 0 28px rgba(0, 224, 198, 0.35);
            display: block;
        }

        .stat__label {
            display: block;
            margin-top: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 24px;
            align-items: stretch;
        }

        .testimonial-card {
            background: var(--card-bg);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            margin: 0;
            transition: all .3s;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .testimonial-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 224, 198, 0.2);
        }

        .testimonial-card__stars {
            color: var(--highlight);
            font-size: 16px;
            letter-spacing: 2px;
        }

        .testimonial-card blockquote {
            margin: 0;
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-primary);
            border-left: 3px solid rgba(77, 124, 254, 0.5);
            padding-left: 16px;
        }

        .testimonial-card figcaption {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: auto;
        }

        .testimonial-card__avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-color), var(--accent-color));
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .testimonial-card figcaption strong {
            display: block;
            font-size: 15px;
            color: var(--text-primary);
        }

        .testimonial-card figcaption span {
            font-size: 13px;
            color: var(--text-muted);
        }

        .testimonial-card--offset {
            transform: translateY(24px);
        }

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

        .post-card {
            background: var(--card-bg);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            margin-bottom: 24px;
        }

        .post-card:hover {
            transform: translateY(-4px);
            border-color: rgba(77, 124, 254, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .post-card__media {
            display: block;
            overflow: hidden;
            border-radius: 0;
            position: relative;
        }

        .post-card__media img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .post-card:hover .post-card__media img {
            transform: scale(1.03);
        }

        .post-card__body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .post-card__meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 6px;
            background: rgba(0, 224, 198, 0.12);
            color: var(--accent-color);
            font-size: 12px;
            font-weight: 600;
            line-height: 1.6;
        }

        .badge--blue {
            background: rgba(77, 124, 254, 0.12);
            color: var(--brand-color);
        }

        .post-card__meta time {
            font-size: 13px;
            color: var(--text-muted);
        }

        .post-card h3 {
            margin: 0;
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .post-card h3 a {
            color: var(--text-primary);
            transition: color .2s;
        }

        .post-card h3 a:hover {
            color: var(--brand-color);
        }

        .post-card p {
            margin: 0;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .post-card__more i {
            transition: transform .25s;
        }

        .post-card__more:hover i {
            transform: translateX(4px);
        }

        .latest-view-all {
            text-align: center;
            margin-top: 24px;
        }

        .empty-state {
            text-align: center;
            padding: 56px 24px;
            background: var(--card-bg);
            border: 1px dashed rgba(255, 255, 255, 0.16);
            border-radius: var(--radius-lg);
            width: 100%;
        }

        .empty-state i {
            font-size: 44px;
            color: var(--text-muted);
            margin-bottom: 16px;
            opacity: 0.8;
        }

        .empty-state p {
            color: var(--text-secondary);
            font-size: 16px;
            margin: 0;
        }

        .cta-section {
            padding: 96px 0;
        }

        .cta__inner {
            background:
                radial-gradient(ellipse at 80% 20%, rgba(77, 124, 254, 0.3), transparent 55%),
                radial-gradient(ellipse at 20% 90%, rgba(0, 224, 198, 0.2), transparent 45%),
                linear-gradient(120deg, #111E38 0%, #0A1228 100%);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 28px;
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta__inner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.06;
        }

        .cta__inner>* {
            position: relative;
            z-index: 1;
        }

        .cta__inner h2 {
            font-size: 34px;
            font-weight: 700;
            margin: 0 0 16px;
            letter-spacing: -0.01em;
        }

        .cta__inner p {
            color: var(--text-secondary);
            font-size: 17px;
            max-width: 560px;
            margin: 0 auto 32px;
        }

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

        .site-footer {
            background: #060D1F;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 80px 0 32px;
        }

        .site-footer .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand:hover {
            color: var(--text-primary);
        }

        .site-footer .footer-brand .brand__icon {
            width: 34px;
            height: 34px;
            font-size: 15px;
        }

        .footer-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: all .25s;
        }

        .footer-social a:hover {
            color: var(--accent-color);
            border-color: rgba(0, 224, 198, 0.3);
            background: rgba(0, 224, 198, 0.08);
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color .2s;
        }

        .footer-col ul a:hover {
            color: var(--accent-color);
        }

        .footer-col ul li:not(a) {
            color: var(--text-muted);
            font-size: 14px;
        }

        .footer-bottom {
            margin-top: 56px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            color: var(--text-muted);
            font-size: 13px;
        }

        @media (max-width: 64em) {
            .section {
                padding: 72px 0;
            }

            .main-nav {
                display: none;
            }

            .hamburger {
                display: inline-flex;
            }

            .hero {
                min-height: auto;
                padding: 100px 0 72px;
            }

            .hero h1 {
                font-size: 38px;
            }

            .hero__visual {
                margin-top: 48px;
                min-height: 380px;
            }

            .hero__card--top {
                left: 0;
            }

            .hero__card--bottom {
                right: 0;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 48px 24px;
            }

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

            .testimonial-card--offset {
                transform: none;
            }

            .cta__inner {
                padding: 56px 32px;
            }
        }

        @media (max-width: 40em) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section {
                padding: 64px 0;
            }

            .site-header {
                height: 60px;
            }

            .header__inner {
                height: 60px;
            }

            .mobile-menu {
                top: 60px;
            }

            .brand__text {
                font-size: 19px;
            }

            .brand__icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .hero {
                padding: 72px 0 56px;
            }

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

            .hero__lead {
                font-size: 16px;
            }

            .hero__actions .btn {
                width: 100%;
            }

            .hero__visual {
                min-height: 320px;
                margin-top: 40px;
            }

            .hero__card {
                min-width: 180px;
                padding: 10px 14px;
            }

            .hero__card--top {
                top: 8px;
                left: 8px;
            }

            .hero__card--bottom {
                bottom: 8px;
                right: 8px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .section-tag {
                font-size: 12px;
            }

            .solution-content {
                padding: 24px 0 8px;
            }

            .solution-content h3 {
                font-size: 21px;
            }

            .solution-content p {
                font-size: 15px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px 20px;
            }

            .stat__num {
                font-size: 40px;
            }

            .testimonial-card {
                padding: 24px;
            }

            .testimonial-card blockquote {
                font-size: 15px;
            }

            .cta__inner {
                padding: 48px 24px;
            }

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

            .cta__inner p {
                font-size: 15px;
            }

            .cta__actions .btn {
                width: 100%;
            }

            .site-footer {
                padding: 56px 0 24px;
            }

            .footer-bottom {
                margin-top: 40px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --bg-primary: #080F1F;
            --bg-secondary: #111E38;
            --bg-deep: #060D1F;
            --brand-primary: #4D7CFE;
            --brand-secondary: #00E0C6;
            --accent-gold: #FFB84D;
            --text-primary: #E8F1FF;
            --text-secondary: #8FA3C0;
            --text-weak: #5D7290;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.16);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-img: 12px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 40px rgba(77, 124, 254, 0.15);
            --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --font-mono: "DIN Alternate", "Roboto Mono", monospace;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

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

        a {
            color: var(--brand-primary);
            text-decoration: none;
            transition: color 0.25s ease, opacity 0.25s ease;
        }

        a:hover {
            color: var(--brand-secondary);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-article {
            max-width: 780px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 39.9375em) {
            .container,
            .container-article {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(8, 15, 31, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: 70px;
        }

        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .brand__icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            box-shadow: 0 0 20px rgba(77, 124, 254, 0.4);
        }

        .brand__text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav .nav-link {
            display: inline-block;
            padding: 9px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.25s ease;
            line-height: 1.4;
        }

        .main-nav .nav-link:hover {
            color: var(--text-primary);
            background: rgba(77, 124, 254, 0.1);
        }

        .main-nav .nav-link.is-active {
            color: var(--text-primary);
            background: rgba(77, 124, 254, 0.18);
            box-shadow: inset 0 0 0 1px rgba(77, 124, 254, 0.3);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-actions .btn {
            min-height: 40px;
            padding: 8px 20px;
            font-size: 14px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            cursor: pointer;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: background 0.25s;
        }

        .hamburger:hover {
            background: rgba(77, 124, 254, 0.12);
        }

        .hamburger span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

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

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

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

        @media (max-width: 63.9375em) {
            .main-nav {
                display: none;
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(8, 15, 31, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 20px 24px 28px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                z-index: 99;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
            }

            .main-nav.is-open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }

            .main-nav .nav-link {
                display: block;
                padding: 14px 20px;
                font-size: 16px;
                border-radius: 12px;
            }

            .hamburger {
                display: flex;
            }
        }

        @media (max-width: 39.9375em) {
            .site-header,
            .header-container {
                height: 60px;
            }

            .main-nav {
                top: 60px;
            }

            .brand__text {
                font-size: 18px;
            }

            .brand__icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .header-container {
                padding: 0 16px;
            }

            .header-actions .btn {
                display: none;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            line-height: 1.4;
            border: none;
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand-primary);
            color: #fff;
            box-shadow: 0 0 20px rgba(77, 124, 254, 0.4);
        }

        .btn-primary:hover {
            background: #6190ff;
            color: #fff;
            box-shadow: 0 0 32px rgba(77, 124, 254, 0.55);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(77, 124, 254, 0.3);
        }

        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .btn-secondary:hover {
            background: rgba(77, 124, 254, 0.1);
            border-color: rgba(77, 124, 254, 0.4);
            color: var(--text-primary);
        }

        .btn-secondary:active {
            background: rgba(77, 124, 254, 0.16);
        }

        .btn-sm {
            min-height: 38px;
            padding: 8px 18px;
            font-size: 14px;
            border-radius: 8px;
        }

        .btn-lg {
            min-height: 50px;
            padding: 14px 36px;
            font-size: 16px;
            border-radius: 12px;
        }

        @media (max-width: 39.9375em) {
            .btn {
                min-height: 46px;
                padding: 12px 22px;
                font-size: 15px;
            }
        }

        /* ===== 文章Hero区 ===== */
        .article-hero {
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-primary) 0%, #0D1B36 40%, var(--bg-primary) 100%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(77, 124, 254, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 30%;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(0, 224, 198, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.25s;
        }

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

        .breadcrumb .breadcrumb-sep {
            color: var(--text-weak);
            opacity: 0.6;
        }

        .breadcrumb .breadcrumb-current {
            color: var(--text-secondary);
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            max-width: 760px;
            position: relative;
            z-index: 1;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 14px;
            color: var(--text-secondary);
            position: relative;
            z-index: 1;
        }

        .article-meta .badge {
            background: rgba(0, 224, 198, 0.14);
            border: 1px solid rgba(0, 224, 198, 0.28);
            color: var(--brand-secondary);
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-item i {
            font-size: 14px;
            color: var(--text-weak);
        }

        .article-hero-cover {
            margin-top: 36px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
            border: 1px solid rgba(255, 255, 255, 0.08);
            position: relative;
            z-index: 1;
            max-width: 780px;
        }

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

        @media (max-width: 63.9375em) {
            .article-hero {
                padding: 60px 0 48px;
            }

            .article-hero h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 39.9375em) {
            .article-hero {
                padding: 44px 0 36px;
            }

            .article-hero h1 {
                font-size: 28px;
                line-height: 1.35;
            }

            .article-meta {
                gap: 10px;
                font-size: 13px;
            }

            .breadcrumb {
                font-size: 12px;
                margin-bottom: 16px;
            }
        }

        /* ===== 正文区 ===== */
        .article-body {
            padding: 64px 0 40px;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: #C5D5EE;
        }

        .article-content h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            margin: 2em 0 0.8em;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.45;
            margin: 1.8em 0 0.6em;
            color: var(--text-primary);
        }

        .article-content p {
            margin-bottom: 1.5em;
            line-height: 1.8;
        }

        .article-content a {
            color: var(--brand-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--brand-secondary);
        }

        .article-content img {
            border-radius: var(--radius-img);
            box-shadow: var(--shadow-card);
            margin: 2em 0;
            max-width: 100%;
            height: auto;
        }

        .article-content blockquote {
            border-left: 3px solid var(--brand-primary);
            background: rgba(255, 255, 255, 0.03);
            padding: 1.2em 1.6em;
            border-radius: 0 12px 12px 0;
            margin: 2em 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content ul,
        .article-content ol {
            margin: 1.2em 0 1.6em;
            padding-left: 1.6em;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.6em;
            line-height: 1.7;
            position: relative;
        }

        .article-content ul li::before {
            content: '';
            position: absolute;
            left: -1.2em;
            top: 0.65em;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--brand-secondary);
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content ol li::before {
            content: none;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 2em 0;
            font-size: 14px;
        }

        .article-content th,
        .article-content td {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            text-align: left;
        }

        .article-content th {
            background: rgba(255, 255, 255, 0.05);
            font-weight: 600;
            color: var(--text-primary);
        }

        .article-content code {
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            font-family: var(--font-mono);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-color);
        }

        .article-not-found i {
            font-size: 48px;
            color: var(--text-weak);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 400px;
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 63.9375em) {
            .article-body {
                padding: 48px 0 32px;
            }

            .article-content h2 {
                font-size: 24px;
            }

            .article-content h3 {
                font-size: 19px;
            }
        }

        @media (max-width: 39.9375em) {
            .article-body {
                padding: 36px 0 24px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .article-not-found {
                padding: 50px 16px;
            }
        }

        /* ===== 标签区 ===== */
        .article-tags-section {
            padding: 32px 0 56px;
        }

        .article-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-label {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-right: 4px;
        }

        .tag-label i {
            color: var(--text-weak);
        }

        .tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.25s ease;
        }

        .tag:hover {
            color: var(--text-primary);
            border-color: var(--brand-primary);
            background: rgba(77, 124, 254, 0.1);
        }

        .article-back {
            margin-top: 24px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.25s;
        }

        .article-back:hover {
            color: var(--brand-primary);
        }

        @media (max-width: 39.9375em) {
            .article-tags-section {
                padding: 20px 0 40px;
            }

            .article-tags {
                gap: 8px;
            }

            .tag {
                padding: 5px 12px;
                font-size: 12px;
            }
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 72px 0;
            background: linear-gradient(180deg, var(--bg-primary) 0%, #0B1428 50%, var(--bg-primary) 100%);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 40px;
            max-width: 480px;
            line-height: 1.6;
        }

        .related-card {
            display: block;
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            margin-bottom: 24px;
            transition: all 0.3s ease;
            height: calc(100% - 24px);
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(77, 124, 254, 0.3);
        }

        .related-thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-secondary);
            position: relative;
        }

        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .related-thumb img {
            transform: scale(1.03);
        }

        .related-thumb::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(8, 15, 31, 0.5) 100%);
            pointer-events: none;
        }

        .related-body {
            padding: 20px;
        }

        .related-body .badge {
            display: inline-block;
            background: rgba(0, 224, 198, 0.12);
            border: 1px solid rgba(0, 224, 198, 0.22);
            color: var(--brand-secondary);
            padding: 3px 10px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .related-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 10px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            transition: color 0.25s;
        }

        .related-card:hover .related-body h3 {
            color: var(--brand-secondary);
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            font-size: 13px;
            color: var(--text-weak);
        }

        .related-meta .read-more {
            color: var(--brand-primary);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            transition: gap 0.25s;
        }

        .related-card:hover .related-meta .read-more {
            gap: 8px;
            color: var(--brand-secondary);
        }

        @media (max-width: 63.9375em) {
            .related-section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 27px;
                margin-bottom: 8px;
            }

            .section-subtitle {
                margin-bottom: 30px;
            }
        }

        @media (max-width: 39.9375em) {
            .related-section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .section-subtitle {
                font-size: 14px;
                margin-bottom: 24px;
            }

            .related-body {
                padding: 16px;
            }

            .related-body h3 {
                font-size: 16px;
            }
        }

        /* ===== CTA区 ===== */
        .cta-section {
            padding: 96px 0;
            background: linear-gradient(135deg, #0D1B36 0%, #13274A 50%, #0D1B36 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(77, 124, 254, 0.25) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
            position: relative;
            z-index: 1;
        }

        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        @media (max-width: 63.9375em) {
            .cta-section {
                padding: 72px 0;
            }

            .cta-section h2 {
                font-size: 30px;
            }
        }

        @media (max-width: 39.9375em) {
            .cta-section {
                padding: 56px 0;
            }

            .cta-section h2 {
                font-size: 24px;
            }

            .cta-section p {
                font-size: 14px;
                padding: 0 16px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 72px 0 0;
            position: relative;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
            text-decoration: none;
        }

        .footer-brand .brand__icon {
            width: 34px;
            height: 34px;
            font-size: 14px;
        }

        .footer-brand .brand__text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-secondary);
            transition: all 0.25s ease;
        }

        .footer-social a:hover {
            background: rgba(77, 124, 254, 0.15);
            border-color: rgba(77, 124, 254, 0.4);
            color: var(--brand-primary);
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--brand-primary);
            border-radius: 2px;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: all 0.25s ease;
            display: inline-block;
        }

        .footer-col ul li a:hover {
            color: var(--brand-primary);
            transform: translateX(3px);
        }

        .footer-bottom {
            margin-top: 56px;
            padding: 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-weak);
        }

        @media (max-width: 63.9375em) {
            .site-footer {
                padding: 56px 0 0;
            }

            .footer-col {
                margin-bottom: 24px;
            }

            .footer-col h4 {
                font-size: 15px;
            }
        }

        @media (max-width: 39.9375em) {
            .site-footer {
                padding: 48px 0 0;
            }

            .footer-brand .brand__text {
                font-size: 18px;
            }

            .footer-desc {
                font-size: 13px;
            }

            .footer-social a {
                width: 42px;
                height: 42px;
            }

            .footer-bottom {
                margin-top: 32px;
            }
        }

        /* ===== 焦点可访问性 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--brand-secondary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ===== 打印样式 ===== */
        @media print {
            .site-header,
            .related-section,
            .cta-section,
            .site-footer {
                display: none;
            }

            .article-body {
                padding: 20px 0;
            }

            body {
                background: #fff;
                color: #333;
            }

            .article-content {
                color: #444;
            }
        }

/* roulang page: category1 */
:root {
            --bg-main: #080F1F;
            --bg-secondary: #111E38;
            --bg-deep: #060D1F;
            --brand: #4D7CFE;
            --brand-light: #6D97FF;
            --accent: #00E0C6;
            --amber: #FFB84D;
            --text-main: #E8F1FF;
            --text-secondary: #8FA3C0;
            --text-weak: #5D7290;
            --border: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-border: rgba(255, 255, 255, 0.1);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 40px rgba(77, 124, 254, 0.15);
            --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --font-num: "DIN Alternate", "Roboto Mono", monospace;
            --space-section: 96px;
            --space-section-mobile: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }

        a {
            color: var(--brand);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--brand-light);
        }

        ul,
        ol {
            list-style: none;
        }

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

        button {
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

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

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(77, 124, 254, 0.1);
            border: 1px solid rgba(77, 124, 254, 0.25);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-main);
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            line-height: 1.2;
            transition: all .25s ease;
            cursor: pointer;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn i {
            font-size: 0.9em;
        }

        .btn-primary {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 0 20px rgba(77, 124, 254, 0.4);
        }

        .btn-primary:hover {
            background: var(--brand-light);
            color: #fff;
            box-shadow: 0 0 32px rgba(77, 124, 254, 0.6);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(77, 124, 254, 0.3);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--text-main);
        }

        .btn-outline:hover {
            background: rgba(77, 124, 254, 0.1);
            border-color: var(--brand);
            color: var(--brand-light);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-sm {
            padding: 10px 20px;
            min-height: 40px;
            font-size: 14px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 70px;
            background: rgba(8, 15, 31, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            transition: opacity .25s ease;
        }

        .brand:hover {
            opacity: 0.88;
            color: var(--text-main);
        }

        .brand__icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand) 0%, #7A5CFF 100%);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 0 16px rgba(77, 124, 254, 0.4);
        }

        .main-nav ul {
            display: flex;
            gap: 4px;
            margin: 0;
            padding: 0;
        }

        .main-nav .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color .25s ease, background .25s ease;
        }

        .main-nav .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }

        .main-nav .nav-link.is-active {
            color: var(--accent);
            background: rgba(0, 224, 198, 0.08);
            font-weight: 600;
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--text-main);
            border: 1px solid var(--border-light);
            background: rgba(255, 255, 255, 0.06);
            transition: background .25s ease;
        }

        .nav-toggle:hover {
            background: rgba(77, 124, 254, 0.15);
        }

        /* ===== Hero ===== */
        .hero {
            min-height: calc(100vh - 70px);
            display: flex;
            align-items: center;
            padding: 120px 0 96px;
            background: linear-gradient(135deg, var(--bg-main) 0%, var(--bg-secondary) 45%, var(--bg-main) 100%);
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }

        .hero--category {
            background-image: url('/assets/images/backpic/back-1.webp');
        }

        .hero--category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(8, 15, 31, 0.95) 10%, rgba(17, 30, 56, 0.82) 55%, rgba(8, 15, 31, 0.96) 100%);
            z-index: 0;
        }

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

        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 999px;
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent);
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--brand-light) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero__sub {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 520px;
            line-height: 1.75;
            margin-bottom: 36px;
        }

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

        .hero__visual {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero__glow {
            position: absolute;
            border-radius: 50%;
            filter: blur(60px);
            opacity: 0.4;
            pointer-events: none;
        }

        .hero__glow--one {
            width: 320px;
            height: 320px;
            background: rgba(77, 124, 254, 0.55);
            top: 20%;
            left: 10%;
        }

        .hero__glow--two {
            width: 200px;
            height: 200px;
            background: rgba(0, 224, 198, 0.35);
            bottom: 15%;
            right: 15%;
        }

        .glass-card {
            position: relative;
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            transition: transform .3s ease, box-shadow .3s ease;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

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

        .glass-card--main {
            width: 340px;
            z-index: 2;
        }

        .glass-card--sub {
            width: 280px;
            z-index: 3;
            position: absolute;
            right: 0;
            bottom: 40px;
            margin: 0;
        }

        .glass-card__icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .glass-card--main .glass-card__icon {
            background: rgba(77, 124, 254, 0.18);
            color: var(--brand-light);
        }

        .glass-card--sub .glass-card__icon {
            background: rgba(0, 224, 198, 0.14);
            color: var(--accent);
        }

        .glass-card__content {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .glass-card__tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
        }

        .glass-card__content strong {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
        }

        .glass-card__content span:last-child {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* ===== Anchor nav ===== */
        .page-anchor {
            padding: 24px 0;
            border-bottom: 1px solid var(--border);
            background: rgba(8, 15, 31, 0.8);
            position: sticky;
            top: 70px;
            z-index: 50;
            backdrop-filter: blur(12px);
        }

        .anchor-list {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .anchor-list a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid transparent;
            transition: all .25s ease;
        }

        .anchor-list a:hover {
            color: var(--accent);
            background: rgba(0, 224, 198, 0.06);
            border-color: rgba(0, 224, 198, 0.2);
        }

        .anchor-list a i {
            font-size: 12px;
        }

        /* ===== Split section ===== */
        .split-section {
            background: var(--bg-main);
        }

        .split-section .grid-x {
            align-items: center;
        }

        .split-media {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .split-media img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .split-media:hover img {
            transform: scale(1.02);
        }

        .split-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(8, 15, 31, 0.2) 0%, transparent 60%);
            pointer-events: none;
        }

        .split-content .section-label {
            margin-bottom: 12px;
        }

        .split-content .section-title {
            margin-bottom: 16px;
        }

        .split-content>p {
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .split-points {
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .split-points li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.6;
        }

        .split-points li i {
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(0, 224, 198, 0.12);
            color: var(--accent);
            font-size: 11px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-top: 3px;
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--bg-secondary);
            position: relative;
        }

        .features-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-light), transparent);
        }

        .features-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .features-head .section-sub {
            margin: 0 auto;
        }

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

        .feature-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--brand), transparent);
            opacity: 0;
            transition: opacity .3s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(77, 124, 254, 0.2);
        }

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

        .feature-card__icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(77, 124, 254, 0.12);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--brand-light);
            margin-bottom: 20px;
            transition: transform .3s ease;
        }

        .feature-card:hover .feature-card__icon {
            transform: scale(1.05) rotate(-3deg);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .feature-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== Stats ===== */
        .stats-section {
            background: var(--bg-main);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .stat-item {
            text-align: center;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius);
            padding: 40px 24px;
            transition: all .3s ease;
        }

        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 224, 198, 0.2);
        }

        .stat-number {
            font-family: var(--font-num);
            font-size: 44px;
            font-weight: 700;
            color: var(--accent);
            text-shadow: 0 0 24px rgba(0, 224, 198, 0.35);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--bg-secondary);
            position: relative;
        }

        .process-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-light), transparent);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 48px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            opacity: 0.3;
            border-radius: 2px;
        }

        .step-item {
            text-align: center;
            padding: 0 16px;
            position: relative;
        }

        .step-num {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand) 0%, #7A5CFF 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 0 24px rgba(77, 124, 254, 0.4);
            position: relative;
            z-index: 1;
        }

        .step-item h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .step-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 280px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-main);
        }

        .faq-list {
            max-width: 800px;
            margin: 48px auto 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: all .3s ease;
        }

        .faq-item.is-active {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(77, 124, 254, 0.3);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            width: 100%;
            text-align: left;
            transition: color .25s ease;
            background: none;
            border: none;
        }

        .faq-item__question:hover {
            color: var(--accent);
        }

        .faq-item__icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(77, 124, 254, 0.12);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--brand-light);
            transition: transform .3s ease, background .3s ease;
        }

        .faq-item.is-active .faq-item__icon {
            transform: rotate(45deg);
            background: rgba(0, 224, 198, 0.15);
            color: var(--accent);
        }

        .faq-item__answer {
            display: none;
            padding: 0 24px 24px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 120px 0;
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-main) 60%, var(--bg-secondary) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(77, 124, 254, 0.15);
            filter: blur(90px);
            top: -100px;
            right: -80px;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(0, 224, 198, 0.08);
            filter: blur(80px);
            bottom: -120px;
            left: -60px;
        }

        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .cta-inner h2 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .cta-inner p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-inner .btn {
            min-width: 180px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 72px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .footer-brand:hover {
            color: var(--text-main);
            opacity: 0.9;
        }

        .footer-brand .brand__icon {
            width: 34px;
            height: 34px;
            font-size: 14px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 340px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-secondary);
            transition: all .25s ease;
        }

        .footer-social a:hover {
            background: rgba(77, 124, 254, 0.12);
            border-color: rgba(77, 124, 254, 0.3);
            color: var(--brand-light);
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            padding-top: 4px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color .25s ease;
            display: inline-block;
        }

        .footer-col a:hover {
            color: var(--accent);
            transform: translateX(2px);
        }

        .footer-bottom {
            margin-top: 56px;
            padding: 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-weak);
        }

        .footer-col li {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* ===== Utilities ===== */
        .text-center {
            text-align: center;
        }

        .mt-2 {
            margin-top: 16px;
        }

        .mb-2 {
            margin-bottom: 16px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 63.99875em) {
            .nav-toggle {
                display: inline-flex;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 16px;
                right: 16px;
                background: rgba(8, 15, 31, 0.96);
                backdrop-filter: blur(18px);
                border-radius: 16px;
                border: 1px solid var(--border-light);
                padding: 16px;
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
            }

            .main-nav.is-open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                gap: 4px;
            }

            .main-nav .nav-link {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }

            .hero {
                padding-top: 100px;
            }

            .hero h1 {
                font-size: 38px;
            }

            .hero__visual {
                margin-top: 48px;
                min-height: 360px;
            }

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

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

            .process-steps::before {
                display: none;
            }
        }

        @media (max-width: 39.99875em) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .site-header {
                height: 60px;
            }

            .brand__text {
                font-size: 18px;
            }

            .brand__icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .main-nav {
                top: 60px;
            }

            .hero {
                min-height: auto;
                padding: 80px 0 64px;
            }

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

            .hero__sub {
                font-size: 16px;
            }

            .hero__actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero__actions .btn {
                width: 100%;
            }

            .hero__visual {
                min-height: 300px;
            }

            .glass-card--main {
                width: 100%;
            }

            .glass-card--sub {
                width: 85%;
                bottom: 10px;
                right: auto;
                left: 8%;
            }

            .page-anchor {
                top: 60px;
                padding: 16px 0;
            }

            .anchor-list {
                gap: 6px;
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 4px;
                -webkit-overflow-scrolling: touch;
            }

            .anchor-list a {
                white-space: nowrap;
                padding: 8px 14px;
                font-size: 13px;
            }

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

            .section-title {
                font-size: 26px;
            }

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

            .feature-card {
                padding: 24px 20px;
            }

            .stats-grid {
                gap: 12px;
            }

            .stat-item {
                padding: 28px 16px;
            }

            .stat-number {
                font-size: 32px;
            }

            .cta-section {
                padding: 80px 0;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .cta-inner .btn {
                width: 100%;
            }

            .split-media img {
                height: 240px;
            }

            .footer-col {
                margin-bottom: 28px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-main: #080F1F;
            --bg-card: #111E38;
            --brand: #4D7CFE;
            --brand-light: #6B97FF;
            --accent: #00E0C6;
            --amber: #FFB84D;
            --text-main: #E8F1FF;
            --text-sub: #8FA3C0;
            --text-weak: #5D7290;
            --border: rgba(255, 255, 255, 0.08);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
            --shadow-hover: 0 8px 40px rgba(77, 124, 254, 0.15);
            --transition: 0.3s ease;
            --header-h: 70px;
            --space-section: 96px;
            --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --font-num: "DIN Alternate", "Roboto Mono", monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a:hover {
            color: var(--brand-light);
        }

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

        ul {
            list-style: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-h);
            background: rgba(8, 15, 31, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }

        .brand__icon {
            color: var(--accent);
            font-size: 24px;
        }

        .brand__text {
            letter-spacing: 0;
        }

        .main-nav ul {
            display: flex;
            gap: 6px;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 999px;
            color: var(--text-sub);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
        }

        .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.is-active {
            color: #fff;
            background: rgba(77, 124, 254, 0.18);
            box-shadow: inset 0 0 0 1px rgba(77, 124, 254, 0.35);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            color: var(--text-main);
            font-size: 20px;
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 44px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 0 20px rgba(77, 124, 254, 0.4);
        }

        .btn-primary:hover {
            background: #5d89ff;
            color: #fff;
            box-shadow: 0 0 28px rgba(77, 124, 254, 0.6);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 12px rgba(77, 124, 254, 0.4);
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
        }

        .btn-secondary:hover {
            background: rgba(77, 124, 254, 0.1);
            border-color: rgba(77, 124, 254, 0.5);
            color: #fff;
        }

        .btn-secondary:active {
            transform: translateY(1px);
        }

        .btn-sm {
            min-height: 40px;
            padding: 8px 18px;
            font-size: 14px;
        }

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

        /* ============ Page Hero ============ */
        .page-hero {
            position: relative;
            padding: 110px 0 80px;
            background-image: linear-gradient(160deg, rgba(8, 15, 31, 0.92) 0%, rgba(17, 30, 56, 0.82) 55%, rgba(8, 15, 31, 0.95) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(77, 124, 254, 0.25) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-inner {
            display: flex;
            align-items: center;
            gap: 56px;
        }

        .hero-content {
            flex: 0 0 55%;
        }

        .hero-visual {
            flex: 0 0 45%;
            position: relative;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(0, 224, 198, 0.1);
            border: 1px solid rgba(0, 224, 198, 0.3);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
        }

        .hero-title {
            font-size: 46px;
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin: 18px 0 16px;
        }

        .hero-title .highlight {
            color: var(--accent);
        }

        .hero-sub {
            font-size: 17px;
            color: var(--text-sub);
            max-width: 540px;
            margin-bottom: 32px;
        }

        .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-card {
            border-radius: 20px;
            padding: 20px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: var(--shadow);
        }

        .hero-card img {
            border-radius: 12px;
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            margin-bottom: 14px;
        }

        .hero-card .card-tag {
            display: inline-block;
            background: rgba(0, 224, 198, 0.15);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 6px;
            margin-bottom: 10px;
        }

        .hero-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .hero-card p {
            font-size: 13px;
            color: var(--text-sub);
        }

        .hero-mini-card {
            margin-top: 16px;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
        }

        .hero-mini-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(77, 124, 254, 0.18);
            color: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .hero-mini-meta strong {
            display: block;
            font-family: var(--font-num);
            font-size: 20px;
            color: var(--accent);
            line-height: 1.2;
        }

        .hero-mini-meta span {
            font-size: 13px;
            color: var(--text-sub);
        }

        /* ============ Sections common ============ */
        .section-pad {
            padding: var(--space-section) 0;
        }

        .section-tag {
            display: inline-block;
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .section-desc {
            color: var(--text-sub);
            margin-top: 12px;
            max-width: 640px;
        }

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

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

        .section-header.center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ Stats ============ */
        .stats-section {
            padding: 0 0 var(--space-section);
        }

        .stat-item {
            text-align: center;
            padding: 36px 20px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            backdrop-filter: blur(12px);
            transition: all var(--transition);
        }

        .stat-item:hover {
            border-color: rgba(0, 224, 198, 0.35);
            box-shadow: var(--shadow-hover);
        }

        .stat-num {
            font-family: var(--font-num);
            font-size: 44px;
            font-weight: 700;
            color: var(--accent);
            text-shadow: 0 0 18px rgba(0, 224, 198, 0.35);
            line-height: 1.2;
        }

        .stat-label {
            color: var(--text-sub);
            font-size: 14px;
            margin-top: 8px;
        }

        /* ============ Features ============ */
        .features-section {
            padding: 0 0 var(--space-section);
        }

        .feature-card {
            padding: 28px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            transition: all var(--transition);
            backdrop-filter: blur(12px);
            height: 100%;
        }

        .feature-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(77, 124, 254, 0.4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(77, 124, 254, 0.15);
            color: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .feature-card p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ============ Coverage ============ */
        .coverage-section {
            padding: var(--space-section) 0;
            background: linear-gradient(180deg, var(--bg-main) 0%, #0C1730 50%, var(--bg-main) 100%);
        }

        .coverage-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            transition: all var(--transition);
            height: 100%;
        }

        .coverage-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(77, 124, 254, 0.4);
        }

        .coverage-card .cover-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
        }

        .coverage-card .cover-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .coverage-card:hover .cover-img img {
            transform: scale(1.03);
        }

        .coverage-card .cover-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(8, 15, 31, 0.6) 100%);
        }

        .coverage-card .cover-body {
            padding: 20px 24px 24px;
        }

        .coverage-card .cover-body h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .coverage-card .cover-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ============ Process ============ */
        .process-section {
            padding: 0 0 var(--space-section);
        }

        .step-card {
            position: relative;
            text-align: center;
            padding: 36px 22px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            transition: all var(--transition);
            height: 100%;
        }

        .step-card:hover {
            border-color: rgba(77, 124, 254, 0.4);
            background: rgba(255, 255, 255, 0.05);
        }

        .step-num {
            font-family: var(--font-num);
            font-size: 38px;
            font-weight: 700;
            color: var(--brand);
            opacity: 0.85;
            line-height: 1;
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin: 14px 0 8px;
        }

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

        /* ============ FAQ ============ */
        .faq-section {
            padding: 0 0 var(--space-section);
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            margin-bottom: 8px;
            overflow: hidden;
            transition: background 0.3s ease;
        }

        .faq-item.is-open {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(77, 124, 254, 0.3);
        }

        .faq-q {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding: 20px 24px;
            background: none;
            border: none;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            min-height: 44px;
        }

        .faq-q .faq-icon {
            color: var(--accent);
            transition: transform 0.3s ease;
            font-size: 15px;
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 224, 198, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .faq-a {
            max-height: 0;
            padding: 0 24px;
            overflow: hidden;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.8;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }

        .faq-item.is-open .faq-a {
            max-height: 400px;
            padding-bottom: 20px;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: 96px 0;
            background-image: linear-gradient(135deg, rgba(77, 124, 254, 0.18), rgba(0, 224, 198, 0.1)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-color: #0C1730;
            background-blend-mode: overlay;
        }

        .cta-inner {
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .cta-desc {
            color: var(--text-sub);
            margin: 16px 0 28px;
            font-size: 16px;
        }

        .cta-btns {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #060D1F;
            border-top: 1px solid var(--border);
            padding: 64px 0 28px;
        }

        .site-footer .grid-x {
            row-gap: 32px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .footer-brand .brand__icon {
            font-size: 22px;
        }

        .footer-desc {
            color: var(--text-sub);
            font-size: 14px;
            max-width: 360px;
            margin-bottom: 18px;
            line-height: 1.7;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            font-size: 16px;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            color: var(--accent);
            border-color: rgba(0, 224, 198, 0.4);
            background: rgba(0, 224, 198, 0.08);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: var(--text-sub);
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--text-main);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            margin-top: 48px;
            padding-top: 22px;
            text-align: center;
            color: var(--text-weak);
            font-size: 13px;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1023px) {
            :root {
                --space-section: 72px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 60px;
                left: 16px;
                right: 16px;
                background: rgba(15, 25, 48, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border: 1px solid var(--border);
                border-radius: var(--radius);
                padding: 16px;
                display: none;
                box-shadow: var(--shadow);
                z-index: 99;
            }

            .main-nav.is-open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                gap: 4px;
            }

            .main-nav a {
                display: block;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }

            .header-actions .btn {
                display: none;
            }

            .hero-inner {
                flex-direction: column;
                gap: 40px;
            }

            .hero-content,
            .hero-visual {
                flex: 1 1 100%;
            }

            .hero-title {
                font-size: 38px;
            }

            .cta-title {
                font-size: 28px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --space-section: 64px;
                --header-h: 60px;
            }

            .container {
                padding: 0 16px;
            }

            .brand {
                font-size: 19px;
            }

            .brand__icon {
                font-size: 20px;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .section-title {
                font-size: 26px;
            }

            .stat-num {
                font-size: 36px;
            }

            .feature-card {
                padding: 24px;
            }

            .coverage-card .cover-body {
                padding: 18px 20px 22px;
            }

            .step-card {
                padding: 28px 16px;
            }

            .faq-q {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-a {
                padding: 0 18px;
            }

            .cta-section {
                padding: 64px 0;
            }

            .cta-title {
                font-size: 24px;
            }

            .footer-brand {
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .hero-btns .btn {
                width: 100%;
            }

            .hero-mini-card {
                flex-direction: column;
                text-align: center;
            }

            .cta-btns .btn {
                width: 100%;
            }
        }