/* roulang page: index */
:root {
            --color-primary: #1A5F7A;
            --color-primary-dark: #124B61;
            --color-accent: #C7974E;
            --color-bg: #F4F7FA;
            --color-surface: #FFFFFF;
            --color-surface-alt: #EBF0F4;
            --color-text: #1C2A38;
            --color-text-secondary: #5B6E82;
            --color-muted: #8EA0B2;
            --color-border: #E2E9EF;
            --color-success: #3A9A6B;
            --overlay-dark: rgba(11, 30, 43, 0.5);
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 2px 8px rgba(28, 42, 56, 0.06);
            --shadow-hover: 0 12px 28px rgba(28, 42, 56, 0.10);
            --shadow-panel: 0 16px 40px rgba(28, 42, 56, 0.16);
            --space-section: 80px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', Helvetica, Arial, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--color-primary-dark);
        }

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

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

        h1,
        h2,
        h3,
        h4 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
        }

        .section-line {
            display: block;
            width: 40px;
            height: 4px;
            background: var(--color-accent);
            border-radius: 2px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--color-text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--color-primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 2px 8px rgba(26, 95, 122, 0.2);
            text-decoration: none;
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

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

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

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--color-surface);
            color: var(--color-primary);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
        }

        .btn-secondary:hover {
            background: var(--color-surface-alt);
            color: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

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

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

        .card-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: all 0.3s ease;
            position: relative;
            height: 100%;
            overflow: hidden;
        }

        .card-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--color-accent);
            transform: translateY(-2px);
            transition: transform 0.3s ease;
        }

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

        .card-item:hover::before {
            transform: translateY(0);
        }

        .icon-primary {
            color: var(--color-primary);
            width: 28px;
            height: 28px;
            flex-shrink: 0;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            height: 64px;
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-card);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            position: relative;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            text-decoration: none;
            flex-shrink: 0;
        }

        .brand-logo .logo-icon {
            width: 34px;
            height: 34px;
            flex-shrink: 0;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            height: 64px;
            margin-left: 12px;
        }

        .main-nav-item {
            display: inline-flex;
            align-items: center;
            height: 64px;
            padding: 0 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            text-decoration: none;
            position: relative;
            transition: color 0.2s ease;
            border-bottom: 2px solid transparent;
        }

        .main-nav-item:hover {
            color: var(--color-primary-dark);
            border-bottom-color: var(--color-border);
        }

        .main-nav-item.active {
            color: var(--color-primary);
            border-bottom-color: var(--color-accent);
        }

        .mega-wrap {
            position: relative;
            height: 64px;
            display: flex;
            align-items: center;
            margin-left: 4px;
        }

        .mega-trigger {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            cursor: pointer;
            transition: all 0.2s ease;
            border: 1px solid transparent;
            background: transparent;
        }

        .mega-trigger:hover {
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }

        .mega-trigger.open {
            background: var(--color-surface-alt);
            color: var(--color-primary);
            border-color: var(--color-border);
        }

        .mega-trigger .arrow {
            transition: transform 0.3s ease;
            font-size: 12px;
            display: inline-block;
        }

        .mega-trigger.open .arrow {
            transform: rotate(180deg);
        }

        .mega-panel {
            position: absolute;
            top: 58px;
            right: 0;
            width: 680px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 12px;
            box-shadow: var(--shadow-panel);
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px) scale(0.98);
            transition: all 0.25s ease;
            z-index: 1000;
        }

        .mega-panel.open {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
        }

        .mega-panel::before {
            content: '';
            position: absolute;
            top: -8px;
            right: 48px;
            width: 16px;
            height: 16px;
            background: var(--color-surface);
            border-left: 1px solid var(--color-border);
            border-top: 1px solid var(--color-border);
            transform: rotate(45deg);
        }

        .mega-panel-inner {
            display: grid;
            grid-template-columns: 1fr 1.2fr 1.1fr;
            gap: 24px;
            padding: 24px;
        }

        .mega-col-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-muted);
            margin-bottom: 12px;
            letter-spacing: 0.05em;
        }

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

        .mega-hot-list li a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 9px 10px;
            border-radius: 8px;
            font-size: 14px;
            color: var(--color-text);
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .mega-hot-list li a:hover {
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }

        .mega-hot-list li a i {
            width: 16px;
            color: var(--color-primary);
            font-size: 14px;
            text-align: center;
        }

        .mega-news-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mega-news-list li a {
            display: block;
            padding: 8px 10px;
            border-radius: 8px;
            transition: background 0.2s ease;
        }

        .mega-news-list li a:hover {
            background: var(--color-surface-alt);
        }

        .mega-news-list .news-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .mega-news-list .news-date {
            font-size: 12px;
            color: var(--color-muted);
            margin-top: 2px;
        }

        .mega-card-entry {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            height: 100%;
            min-height: 146px;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: flex-end;
            padding: 16px;
            color: #fff;
            text-decoration: none;
        }

        .mega-card-entry::after {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--overlay-dark);
        }

        .mega-card-entry .entry-content {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .mega-card-entry .entry-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }

        .mega-card-entry .entry-btn {
            display: inline-block;
            padding: 6px 14px;
            border: 1px solid #fff;
            border-radius: 20px;
            font-size: 13px;
            color: #fff;
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .mega-card-entry .entry-btn:hover {
            background: #fff;
            color: var(--color-primary-dark);
        }

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

        .header-login-btn {
            white-space: nowrap;
            padding: 9px 20px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            background: none;
            border: 1px solid var(--color-border);
            border-radius: 8px;
            cursor: pointer;
            color: var(--color-text);
            font-size: 18px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-panel);
            z-index: 998;
            padding: 16px 20px 20px;
            max-height: calc(100vh - 60px);
            overflow-y: auto;
        }

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

        .mobile-nav-list {
            list-style: none;
            margin: 0 0 12px;
            padding: 0;
        }

        .mobile-nav-list li a {
            display: block;
            padding: 12px 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: 8px;
            text-decoration: none;
        }

        .mobile-nav-list li a:hover {
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }

        .mobile-nav-list li a.active {
            color: var(--color-primary);
            background: var(--color-surface-alt);
        }

        .mobile-mega {
            margin-top: 8px;
            border: 1px solid var(--color-border);
            border-radius: 10px;
            padding: 14px;
        }

        .mobile-mega-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .mobile-mega-content {
            display: none;
            padding-top: 8px;
        }

        .mobile-mega.open .mobile-mega-content {
            display: block;
        }

        .mobile-mega-content a {
            display: block;
            padding: 8px 4px;
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .mobile-mega-content a:hover {
            color: var(--color-primary);
        }

        .mobile-login-btn {
            width: 100%;
            margin-top: 14px;
        }

        /* Hero */
        .hero-section {
            background: var(--color-bg);
            padding: 80px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(26, 95, 122, 0.06);
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: 30%;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(199, 151, 78, 0.08);
        }

        .hero-inner {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 56px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 560px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            padding: 6px 14px;
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-bottom: 20px;
        }

        .hero-badge i {
            color: var(--color-accent);
        }

        .hero-title {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }

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

        .hero-subtitle {
            font-size: 17px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            max-width: 540px;
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .hero-trust {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            align-items: center;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-secondary);
        }

        .trust-item i {
            color: var(--color-primary);
            font-size: 15px;
        }

        .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-panel);
            aspect-ratio: 16/10;
            background: var(--color-surface-alt);
        }

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

        .hero-image-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 30, 43, 0) 40%, rgba(11, 30, 43, 0.18) 100%);
            pointer-events: none;
        }

        .hero-image-card {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.94);
            border-radius: 10px;
            padding: 14px 16px;
            display: flex;
            align-items: center;
            gap: 12px;
            z-index: 2;
            box-shadow: 0 8px 20px rgba(11, 30, 43, 0.12);
            backdrop-filter: blur(6px);
        }

        .hero-image-card .card-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--color-surface-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        .hero-image-card .card-text {
            flex: 1;
            min-width: 0;
        }

        .hero-image-card .card-text strong {
            display: block;
            font-size: 14px;
            color: var(--color-text);
            line-height: 1.4;
        }

        .hero-image-card .card-text span {
            font-size: 12px;
            color: var(--color-muted);
        }

        /* Pain Section */
        .pain-section {
            padding: var(--space-section) 0;
            background: var(--color-surface);
        }

        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .pain-card .icon-wrap {
            width: 48px;
            height: 48px;
            border: 1.5px solid var(--color-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--color-primary);
            font-size: 22px;
        }

        .pain-card h3 {
            font-size: 17px;
            font-weight: 650;
            margin-bottom: 10px;
        }

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

        /* Solution Section */
        .solution-section {
            padding: var(--space-section) 0;
            background: var(--color-bg);
        }

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 44px;
            align-items: start;
        }

        .solution-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            box-shadow: var(--shadow-card);
            position: relative;
            transition: all 0.3s ease;
            text-align: left;
        }

        .solution-card.center-up {
            transform: translateY(-24px);
            border-bottom: 4px solid var(--color-primary);
        }

        .solution-card.center-up:hover {
            transform: translateY(-28px);
        }

        .solution-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .step-number {
            font-size: 40px;
            font-weight: 300;
            color: var(--color-accent);
            line-height: 1;
            margin-bottom: 16px;
        }

        .solution-card h3 {
            font-size: 17px;
            font-weight: 650;
            margin-bottom: 10px;
        }

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

        .solution-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }

        .solution-link:hover {
            color: var(--color-primary-dark);
            gap: 10px;
        }

        /* Data Section */
        .data-section {
            background: var(--color-primary-dark);
            padding: 64px 0;
            color: #fff;
        }

        .data-section .section-title {
            color: #fff;
        }

        .data-section .section-subtitle {
            color: #DCE7EF;
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 48px;
        }

        .data-item {
            text-align: center;
            padding: 24px 16px;
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.06);
            transition: background 0.3s ease;
        }

        .data-item:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .data-number {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .data-number.accent {
            color: var(--color-accent);
        }

        .data-label {
            font-size: 14px;
            color: #DCE7EF;
        }

        .data-note {
            text-align: center;
            color: rgba(220, 231, 239, 0.8);
            font-size: 13px;
            margin-top: 32px;
            line-height: 1.6;
        }

        /* News Section */
        .news-section {
            padding: var(--space-section) 0;
            background: var(--color-surface);
        }

        .news-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

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

        .news-card {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            text-decoration: none;
            height: 100%;
        }

        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: transparent;
        }

        .news-card:hover .news-title-link {
            color: var(--color-primary);
        }

        .news-thumb {
            width: 96px;
            height: 72px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-surface-alt);
        }

        .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-cat {
            display: inline-block;
            font-size: 12px;
            color: var(--color-primary);
            background: rgba(26, 95, 122, 0.08);
            padding: 2px 10px;
            border-radius: 20px;
            margin-bottom: 6px;
            font-weight: 500;
        }

        .news-title-link {
            display: block;
            font-size: 16px;
            font-weight: 650;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 6px;
            transition: color 0.2s ease;
            text-decoration: none;
        }

        .news-summary {
            font-size: 13px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

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

        .news-meta time {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 0;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .empty-state .empty-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            color: var(--color-muted);
            font-size: 24px;
        }

        .empty-state p {
            color: var(--color-text-secondary);
            font-size: 14px;
        }

        /* Feature Section */
        .feature-section {
            padding: var(--space-section) 0;
            background: var(--color-bg);
        }

        .feature-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .feature-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-panel);
            background: var(--color-surface-alt);
            aspect-ratio: 4/3;
        }

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

        .feature-list {
            margin-top: 20px;
            list-style: none;
            padding: 0;
        }

        .feature-list li {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--color-border);
            align-items: flex-start;
        }

        .feature-list li:last-child {
            border-bottom: none;
        }

        .feature-list .feature-icon {
            width: 20px;
            height: 20px;
            color: var(--color-accent);
            margin-top: 3px;
            flex-shrink: 0;
        }

        .feature-list .feature-text strong {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .feature-list .feature-text p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* CTA Section */
        .cta-section {
            padding: 56px 0;
        }

        .cta-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            border: 1px solid var(--color-border);
            flex-wrap: wrap;
        }

        .cta-content h2 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .cta-content p {
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .cta-card .btn-primary {
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary-dark);
            color: #fff;
            padding: 56px 0 24px;
            margin-top: 56px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 12px;
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .footer-col ul a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }

        /* Modal */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--overlay-dark);
            z-index: 1200;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            backdrop-filter: blur(4px);
        }

        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .modal-box {
            width: 92%;
            max-width: 480px;
            background: var(--color-surface);
            border-radius: 12px;
            box-shadow: var(--shadow-panel);
            padding: 36px 32px 28px;
            position: relative;
            transform: translateY(16px) scale(0.97);
            transition: all 0.3s ease;
        }

        .modal-overlay.active .modal-box {
            transform: translateY(0) scale(1);
        }

        .modal-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: none;
            background: var(--color-bg);
            color: var(--color-text-secondary);
            font-size: 14px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
        }

        .modal-close:hover {
            background: var(--color-surface-alt);
            color: var(--color-text);
        }

        .modal-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .modal-subtitle {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 24px;
        }

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

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-secondary);
            margin-bottom: 6px;
        }

        .form-label .required {
            color: #C0392B;
            margin-left: 2px;
        }

        .form-control {
            width: 100%;
            height: 44px;
            border: 1px solid var(--color-border);
            border-radius: 8px;
            padding: 0 14px;
            font-size: 14px;
            background: var(--color-surface);
            color: var(--color-text);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
            outline: none;
        }

        .form-control:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.15);
        }

        textarea.form-control {
            height: auto;
            min-height: 80px;
            padding: 10px 14px;
            resize: vertical;
            line-height: 1.6;
        }

        .form-submit {
            width: 100%;
            margin-top: 8px;
        }

        .form-privacy {
            font-size: 13px;
            color: var(--color-text-secondary);
            text-align: center;
            margin-top: 14px;
            line-height: 1.5;
        }

        .validation-tip {
            font-size: 13px;
            color: #C0392B;
            margin-top: 4px;
            display: none;
        }

        .has-error .form-control {
            border-color: #C0392B;
        }

        .has-error .validation-tip {
            display: block;
        }

        /* Floating Button */
        .float-cta {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 900;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            border: 2px solid var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            box-shadow: var(--shadow-panel);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .float-cta:hover {
            transform: translateY(-4px) rotate(4deg);
            background: var(--color-primary-dark);
            color: #fff;
        }

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

        /* FAQ Section */
        .faq-section {
            padding: var(--space-section) 0;
            background: var(--color-surface);
        }

        .faq-list {
            max-width: 860px;
            margin: 40px auto 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 20px 0;
            transition: border-color 0.3s ease;
        }

        .faq-item:first-child {
            border-top: 1px solid var(--color-border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            transition: color 0.2s ease;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 4px 0;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1.5px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-text-secondary);
            flex-shrink: 0;
            transition: all 0.3s ease;
            line-height: 1;
        }

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

        .faq-answer {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 12px 0 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --space-section: 64px;
            }

            .hero-inner {
                gap: 40px;
            }

            .hero-title {
                font-size: 34px;
            }

            .mega-panel {
                width: 620px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 56px;
            }

            .header-inner {
                height: 56px;
            }

            .main-nav {
                display: none;
            }

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

            .nav-toggle {
                display: flex;
            }

            .mega-wrap {
                display: none;
            }

            .mobile-menu {
                top: 56px;
            }

            .hero-section {
                padding: 48px 0 40px;
            }

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

            .hero-title {
                font-size: 30px;
            }

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

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                padding: 10px 22px;
                font-size: 14px;
            }

            .pain-grid,
            .solution-grid {
                grid-template-columns: 1fr;
            }

            .solution-card.center-up {
                transform: translateY(0);
                border-bottom: 2px solid var(--color-primary);
            }

            .solution-card.center-up:hover {
                transform: translateY(-4px);
            }

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

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

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

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

            .cta-card {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }

            .mega-panel {
                width: 100%;
                top: 64px;
                right: 0;
                border-radius: 0;
                border-left: none;
                border-right: none;
                box-shadow: var(--shadow-panel);
            }

            .mega-panel-inner {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .float-cta {
                bottom: 24px;
                right: 24px;
                width: 48px;
                height: 48px;
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

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

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

            .news-card {
                flex-direction: column;
            }

            .news-thumb {
                width: 100%;
                height: 120px;
            }

            .data-number {
                font-size: 28px;
            }

            .modal-box {
                padding: 28px 20px 20px;
            }

            .hero-trust {
                gap: 12px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1A5F7A;
            --color-primary-dark: #124B61;
            --color-accent: #C7974E;
            --color-bg: #F4F7FA;
            --color-surface: #FFFFFF;
            --color-surface-alt: #EBF0F4;
            --color-text: #1C2A38;
            --color-text-secondary: #5B6E82;
            --color-muted: #8EA0B2;
            --color-border: #E2E9EF;
            --color-success: #3A9A6B;
            --overlay-dark: rgba(11, 30, 43, 0.5);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 2px 8px rgba(28, 42, 56, 0.06);
            --shadow-hover: 0 12px 28px rgba(28, 42, 56, 0.10);
            --shadow-modal: 0 16px 40px rgba(28, 42, 56, 0.16);
            --container-max: 1200px;
            --header-height: 64px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }

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

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

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
        }

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

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            flex-shrink: 0;
            line-height: 1.2;
        }

        .logo-icon {
            width: 32px;
            height: 32px;
            color: var(--color-primary);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0 auto;
        }

        .main-nav-item {
            position: relative;
            padding: 6px 2px;
            color: var(--color-text);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.2s;
        }

        .main-nav-item::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--color-accent);
            transform: scaleX(0);
            transition: transform 0.25s;
        }

        .main-nav-item:hover {
            color: var(--color-primary-dark);
        }

        .main-nav-item:hover::after {
            transform: scaleX(1);
            background: var(--color-border);
        }

        .main-nav-item.active {
            color: var(--color-primary);
            font-weight: 600;
        }

        .main-nav-item.active::after {
            transform: scaleX(1);
            background: var(--color-accent);
        }

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

        /* Mega 菜单 */
        .mega-wrap {
            position: relative;
        }

        .mega-trigger {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            background: transparent;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            cursor: pointer;
            transition: background 0.2s, color 0.2s;
        }

        .mega-trigger:hover {
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }

        .mega-trigger .arrow {
            font-size: 12px;
            transition: transform 0.3s;
        }

        .mega-trigger[aria-expanded="true"] .arrow {
            transform: rotate(180deg);
        }

        .mega-trigger[aria-expanded="true"] {
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }

        .mega-panel {
            position: absolute;
            top: calc(100% + 12px);
            right: 0;
            width: 680px;
            max-width: calc(100vw - 32px);
            background: var(--color-surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-modal);
            border: 1px solid var(--color-border);
            padding: 24px;
            display: none;
            z-index: 200;
        }

        .mega-panel.show {
            display: block;
        }

        .mega-panel::before {
            content: '';
            position: absolute;
            top: -6px;
            right: 46px;
            width: 12px;
            height: 12px;
            background: var(--color-surface);
            border-left: 1px solid var(--color-border);
            border-top: 1px solid var(--color-border);
            transform: rotate(45deg);
        }

        .mega-panel-inner {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
        }

        .mega-col-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-muted);
            letter-spacing: 0.06em;
            margin-bottom: 14px;
        }

        .mega-hot-list li {
            margin-bottom: 4px;
        }

        .mega-hot-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 10px;
            border-radius: 8px;
            font-size: 15px;
            color: var(--color-text);
            transition: background 0.2s, color 0.2s;
        }

        .mega-hot-list a i {
            width: 18px;
            text-align: center;
            color: var(--color-primary);
            font-size: 14px;
        }

        .mega-hot-list a:hover {
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }

        .mega-news-list li {
            margin-bottom: 12px;
        }

        .mega-news-list a {
            display: block;
            padding: 6px 0;
        }

        .mega-news-list a span {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            transition: color 0.2s;
        }

        .mega-news-list a:hover span {
            color: var(--color-primary);
            text-decoration: underline;
        }

        .mega-news-list time {
            display: block;
            font-size: 13px;
            color: var(--color-muted);
            margin-top: 2px;
        }

        .mega-entry-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            min-height: 180px;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: flex-end;
        }

        .mega-entry-overlay {
            position: absolute;
            inset: 0;
            background: var(--overlay-dark);
        }

        .mega-entry-content {
            position: relative;
            z-index: 1;
            padding: 20px;
            color: #fff;
        }

        .mega-entry-title {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            cursor: pointer;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            text-align: center;
        }

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

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

        .btn-primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

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

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

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

        .btn-light-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }

        .btn-light-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--color-surface-alt);
            color: var(--color-text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        /* 移动端菜单 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--color-surface);
            z-index: 99;
            padding: 24px 20px;
            overflow-y: auto;
            flex-direction: column;
            gap: 8px;
        }

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

        .mobile-menu .main-nav-item {
            font-size: 18px;
            padding: 14px 0;
            border-bottom: 1px solid var(--color-border);
        }

        .mobile-menu .mobile-mega {
            border-bottom: 1px solid var(--color-border);
        }

        .mobile-menu .mega-trigger {
            justify-content: space-between;
            width: 100%;
            font-size: 16px;
            font-weight: 500;
            padding: 14px 0;
            background: none;
            border-radius: 0;
        }

        .mobile-menu .mega-trigger[aria-expanded="true"] {
            background: var(--color-surface-alt);
        }

        .mobile-menu .mega-panel {
            display: none;
            position: static;
            width: 100%;
            box-shadow: none;
            border: none;
            padding: 12px 0;
        }

        .mobile-menu .mega-panel.show {
            display: block;
        }

        .mobile-menu .mega-panel::before {
            display: none;
        }

        .mobile-menu .mega-panel-inner {
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .mobile-menu .mega-entry-card {
            min-height: 150px;
        }

        .mobile-login-btn {
            margin-top: 20px;
            width: 100%;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            min-height: 260px;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            padding: 48px 0;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: var(--overlay-dark);
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 820px;
            color: #fff;
        }

        .hero-accent {
            width: 40px;
            height: 4px;
            background: var(--color-accent);
            margin-bottom: 16px;
        }

        .hero-content h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: #fff;
        }

        .hero-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.92);
            max-width: 540px;
            margin-bottom: 24px;
        }

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

        @media (max-width: 768px) {
            .page-hero {
                min-height: 180px;
                padding: 40px 0;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-content p {
                font-size: 15px;
            }
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
        }

        @media (max-width: 640px) {
            .section {
                padding: 48px 0;
            }
        }

        .section-header {
            margin-bottom: 40px;
            max-width: 720px;
        }

        .section-accent {
            width: 40px;
            height: 4px;
            background: var(--color-accent);
            margin-bottom: 16px;
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--color-text-secondary);
            line-height: 1.75;
        }

        @media (max-width: 640px) {
            .section-header h2 {
                font-size: 24px;
            }
        }

        /* 登录方式卡片 */
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .method-card {
            position: relative;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .method-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 0 0 2px 2px;
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }

        .method-card:hover::before {
            transform: scaleX(1);
        }

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

        .method-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--color-surface-alt);
            color: var(--color-primary);
            font-size: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .method-card h3 {
            font-size: 19px;
            font-weight: 650;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .method-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            flex-grow: 1;
        }

        .method-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 18px;
        }

        .method-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: var(--color-surface-alt);
            color: var(--color-primary-dark);
            font-size: 13px;
            font-weight: 500;
        }

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

        @media (max-width: 640px) {
            .methods-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 登录流程 */
        .process-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .process-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

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

        .process-head {
            margin-bottom: 28px;
        }

        .process-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.35;
            margin-bottom: 10px;
        }

        .process-head p {
            font-size: 15px;
            color: var(--color-text-secondary);
        }

        .step-list {
            display: grid;
            gap: 16px;
        }

        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 18px 20px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: transparent;
            transform: translateX(4px);
        }

        .step-number {
            font-size: 32px;
            font-weight: 400;
            color: var(--color-accent);
            line-height: 1;
            min-width: 42px;
        }

        .step-content h4 {
            font-size: 16px;
            font-weight: 650;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .step-content p {
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        @media (max-width: 1024px) {
            .process-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* 深色安全区 */
        .dark-section {
            background: var(--color-primary-dark);
            padding: 80px 0;
            color: #fff;
        }

        @media (max-width: 640px) {
            .dark-section {
                padding: 48px 0;
            }
        }

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

        .dark-section .section-header p {
            color: #DCE7EF;
        }

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

        .security-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-card);
            padding: 24px;
            transition: all 0.3s ease;
        }

        .security-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
        }

        .security-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.1);
            color: var(--color-accent);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .security-card h4 {
            font-size: 16px;
            font-weight: 650;
            color: #fff;
            margin-bottom: 8px;
        }

        .security-card p {
            font-size: 14px;
            color: #DCE7EF;
            line-height: 1.65;
        }

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

        @media (max-width: 640px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 问题排查 */
        .trouble-list {
            max-width: 820px;
            margin: 0 auto;
            display: grid;
            gap: 16px;
        }

        .trouble-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }

        .trouble-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: transparent;
            transform: translateX(4px);
        }

        .trouble-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--color-surface-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 16px;
            flex-shrink: 0;
        }

        .trouble-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .trouble-item p {
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 20px 0;
        }

        .faq-item:first-child {
            border-top: 1px solid var(--color-border);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            padding: 4px 0;
            background: none;
            width: 100%;
            text-align: left;
            transition: color 0.2s;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-surface-alt);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-text-secondary);
            flex-shrink: 0;
            transition: all 0.3s ease;
            position: relative;
        }

        .faq-icon::after {
            content: '+';
            font-weight: 400;
            line-height: 1;
        }

        .faq-item.open .faq-icon {
            background: var(--color-primary);
            color: #fff;
        }

        .faq-item.open .faq-icon::after {
            content: '×';
            font-size: 18px;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 14px;
            line-height: 1.65;
            color: var(--color-text-secondary);
        }

        .faq-item.open .faq-answer {
            max-height: 600px;
            padding-top: 12px;
        }

        /* CTA */
        .cta-section {
            padding: 48px 0 80px;
        }

        .cta-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
        }

        .cta-card h2 {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .cta-card p {
            color: var(--color-text-secondary);
            font-size: 14px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 52px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand .brand-logo .logo-icon {
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.75);
            max-width: 380px;
        }

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

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

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(0, 0, 0, 0.12);
            padding: 16px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .footer-bottom {
                padding: 14px 16px;
            }
        }

        /* ===== 响应式导航 ===== */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 16px;
            }
            .mega-panel {
                width: 620px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                gap: 12px;
            }
            .main-nav {
                display: none;
            }
            .mega-wrap {
                display: none;
            }
            .header-login-btn {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
        }

/* roulang page: article */
:root {
    --color-primary: #1A5F7A;
    --color-primary-dark: #124B61;
    --color-accent: #C7974E;
    --color-bg: #F4F7FA;
    --color-surface: #FFFFFF;
    --color-surface-alt: #EBF0F4;
    --color-text: #1C2A38;
    --color-text-secondary: #5B6E82;
    --color-muted: #8EA0B2;
    --color-border: #E2E9EF;
    --color-success: #3A9A6B;
    --overlay-dark: rgba(11, 30, 43, 0.5);
    --radius-card: 12px;
    --radius-btn: 8px;
    --shadow-card: 0 2px 8px rgba(28, 42, 56, 0.06);
    --shadow-hover: 0 12px 28px rgba(28, 42, 56, 0.10);
    --shadow-modal: 0 16px 40px rgba(28, 42, 56, 0.16);
    --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, Helvetica, Arial, sans-serif;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}
img {
    max-width: 100%;
    display: block;
}
button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}
ul, ol {
    list-style: none;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius-btn);
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    line-height: 1.4;
    background: none;
}
.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.btn-primary:active {
    transform: scale(0.98);
}
.btn-primary:focus-visible,
.btn-outline:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}
.btn-outline {
    background: var(--color-surface);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}
.btn-outline:hover {
    background: var(--color-surface-alt);
}
.btn-block {
    width: 100%;
    display: flex;
}
.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    height: 64px;
}
.header-inner {
    display: flex;
    align-items: center;
    height: 64px;
    gap: 24px;
}
.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    white-space: nowrap;
}
.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
    flex-shrink: 0;
}
.main-nav {
    display: flex;
    gap: 4px;
}
.main-nav-item {
    position: relative;
    padding: 10px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: 6px;
}
.main-nav-item::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 0;
    height: 2px;
    background: transparent;
    border-radius: 2px;
    transition: background 0.2s ease;
}
.main-nav-item:hover {
    color: var(--color-primary-dark);
}
.main-nav-item:hover::after {
    background: var(--color-border);
}
.main-nav-item.active {
    color: var(--color-primary);
    font-weight: 600;
}
.main-nav-item.active::after {
    background: var(--color-accent);
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}
.mega-wrap {
    position: relative;
}
.mega-trigger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-btn);
    cursor: pointer;
    transition: background 0.2s;
}
.mega-trigger:hover {
    background: var(--color-surface-alt);
}
.mega-trigger .arrow {
    transition: transform 0.3s;
    font-size: 12px;
}
.mega-wrap.mega-open .mega-trigger {
    background: var(--color-surface-alt);
}
.mega-wrap.mega-open .arrow {
    transform: rotate(180deg);
}
.mega-panel {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: 680px;
    background: var(--color-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-modal);
    border: 1px solid var(--color-border);
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
    z-index: 120;
}
.mega-wrap.mega-open .mega-panel {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.mega-panel::before {
    content: "";
    position: absolute;
    top: -8px;
    right: 52px;
    width: 16px;
    height: 16px;
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    border-top: 1px solid var(--color-border);
    transform: rotate(45deg);
}
.mega-panel-inner {
    display: grid;
    grid-template-columns: 1.1fr 1fr 1fr;
    gap: 20px;
}
.mega-col-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    margin-bottom: 12px;
}
.mega-hot-list li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 8px;
    font-size: 15px;
    color: var(--color-text);
    transition: background 0.2s, color 0.2s;
}
.mega-hot-list li a i {
    width: 18px;
    color: var(--color-primary);
    font-size: 14px;
    text-align: center;
}
.mega-hot-list li a:hover {
    background: var(--color-surface-alt);
    color: var(--color-primary);
}
.mega-news-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
}
.mega-news-list li:last-child {
    border-bottom: none;
}
.mega-news-list a {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    display: block;
    line-height: 1.4;
}
.mega-news-list a:hover {
    text-decoration: underline;
    color: var(--color-primary);
}
.mega-news-list span {
    font-size: 13px;
    color: var(--color-muted);
}
.mega-card {
    position: relative;
    display: block;
    border-radius: var(--radius-card);
    overflow: hidden;
    height: 130px;
}
.mega-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.mega-card-overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay-dark);
}
.mega-card-content {
    position: absolute;
    left: 16px;
    bottom: 14px;
    color: #fff;
}
.mega-card-label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}
.mega-card-btn {
    display: inline-block;
    padding: 4px 14px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 999px;
    font-size: 13px;
    color: #fff;
}
.header-login-btn {
    white-space: nowrap;
}
.mobile-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: var(--color-primary);
    font-size: 18px;
    cursor: pointer;
    margin-left: auto;
}
.mobile-toggle:hover {
    background: var(--color-surface-alt);
}
.mobile-menu {
    display: none;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 16px 20px 24px;
}
.mobile-menu.open {
    display: block;
}
.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
}
.mobile-nav-item {
    padding: 12px 8px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    color: var(--color-text);
}
.mobile-nav-item:hover {
    color: var(--color-primary);
}
.mobile-nav-item.active {
    color: var(--color-primary);
    background: var(--color-surface-alt);
    font-weight: 600;
}
.mobile-mega-title {
    font-size: 14px;
    color: var(--color-muted);
    margin-bottom: 10px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 13px;
    color: var(--color-muted);
}
.breadcrumb a {
    color: var(--color-muted);
}
.breadcrumb a:hover {
    color: var(--color-primary);
}
.breadcrumb-sep {
    color: var(--color-border);
    font-size: 14px;
}
.breadcrumb-current {
    color: var(--color-text-secondary);
}

.article-header {
    padding: 48px 0 28px;
    background: var(--color-bg);
}
.article-header-inner {
    max-width: 860px;
    margin: 0 auto;
}
.article-header h1 {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin: 16px 0 0;
    word-break: break-word;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
    font-size: 14px;
    color: var(--color-muted);
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.meta-item i {
    color: var(--color-accent);
    font-size: 14px;
}

.article-body-section {
    padding: 48px 0 56px;
}
.article-content {
    max-width: 760px;
    margin: 0 auto;
}
.article-content p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text);
}
.article-content h2 {
    font-size: 24px;
    font-weight: 700;
    margin-top: 40px;
    margin-bottom: 16px;
    color: var(--color-text);
    line-height: 1.4;
}
.article-content h3 {
    font-size: 19px;
    font-weight: 650;
    margin-top: 32px;
    margin-bottom: 12px;
    color: var(--color-text);
    line-height: 1.45;
}
.article-content ul,
.article-content ol {
    padding-left: 24px;
    margin-bottom: 20px;
}
.article-content ul {
    list-style: disc;
}
.article-content ol {
    list-style: decimal;
}
.article-content li {
    line-height: 1.7;
    margin-bottom: 8px;
    font-size: 16px;
}
.article-content blockquote {
    border-left: 4px solid var(--color-accent);
    background: var(--color-surface-alt);
    padding: 16px 20px;
    border-radius: 8px;
    margin: 24px 0;
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.7;
}
.article-content img {
    width: 100%;
    border-radius: var(--radius-card);
    margin: 24px 0;
    object-fit: cover;
}
.article-content figcaption {
    font-size: 13px;
    color: var(--color-muted);
    text-align: center;
    margin-top: 8px;
}
.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
}
.article-content a:hover {
    color: var(--color-primary-dark);
}

.article-notfound {
    text-align: center;
    padding: 48px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
}
.notfound-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--color-surface-alt);
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 24px;
}
.article-notfound h2 {
    font-size: 24px;
    margin-bottom: 8px;
}
.article-notfound p {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}

.article-footer-links {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 48px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}
.back-link {
    font-size: 15px;
    color: var(--color-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.back-link:hover {
    color: var(--color-primary-dark);
}
.top-link {
    font-size: 14px;
    color: var(--color-muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.top-link:hover {
    color: var(--color-primary);
}

.steps-section {
    background: var(--color-primary-dark);
    padding: 72px 0;
}
.section-kicker {
    display: block;
    width: 40px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 2px;
    margin-bottom: 16px;
}
.steps-section h2 {
    font-size: 30px;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
}
.section-sub {
    color: #DCE7EF;
    font-size: 16px;
    margin-top: 8px;
}
.steps-timeline {
    display: flex;
    margin-top: 40px;
    align-items: stretch;
}
.step-item {
    flex: 1;
    padding: 28px 24px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-card);
    transition: background 0.3s, transform 0.3s;
}
.step-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}
.step-num {
    font-size: 40px;
    font-weight: 300;
    color: var(--color-accent);
    line-height: 1;
    display: block;
    margin-bottom: 14px;
}
.step-item h3 {
    color: #fff;
    font-size: 17px;
    font-weight: 650;
    margin-bottom: 8px;
}
.step-item p {
    color: #DCE7EF;
    font-size: 14px;
    line-height: 1.6;
}
.step-line {
    width: 32px;
    height: 2px;
    background: var(--color-accent);
    align-self: center;
    flex-shrink: 0;
}

.related-section {
    padding: 72px 0;
}
.related-section h2 {
    font-size: 30px;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
}
.related-card {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: transform 0.25s, box-shadow 0.25s;
    height: 100%;
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.related-thumb {
    height: 130px;
    overflow: hidden;
}
.related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.related-card:hover .related-thumb img {
    transform: scale(1.04);
}
.related-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.45;
    padding: 16px 16px 4px;
}
.related-meta {
    display: block;
    font-size: 13px;
    color: var(--color-muted);
    padding: 0 16px 16px;
}

.cta-section {
    padding: 64px 0;
}
.cta-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 36px 40px;
}
.cta-text h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}
.cta-text p {
    color: var(--color-text-secondary);
    font-size: 15px;
    max-width: 560px;
    line-height: 1.6;
}

.site-footer {
    background: var(--color-primary-dark);
    color: #DCE7EF;
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand .brand-logo {
    color: #fff;
}
.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    color: #B9C9D4;
    max-width: 340px;
    line-height: 1.7;
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: #B9C9D4;
    font-size: 14px;
    transition: color 0.2s;
}
.footer-col ul li a:hover {
    color: #fff;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 13px;
    color: #9DB1BE;
}

.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--overlay-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    padding: 16px;
}
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}
.modal-card {
    width: 480px;
    max-width: 100%;
    background: var(--color-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-modal);
    padding: 32px;
    position: relative;
    transform: scale(0.95) translateY(12px);
    transition: transform 0.3s;
    max-height: 90vh;
    overflow-y: auto;
}
.modal-overlay.active .modal-card {
    transform: scale(1) translateY(0);
}
.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 999px;
    background: var(--color-surface-alt);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
.modal-close:hover {
    background: var(--color-border);
    color: var(--color-text);
}
.modal-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
    padding-right: 24px;
}
.modal-sub {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
}
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
    font-weight: 500;
}
.required {
    color: #C0392B;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    height: 44px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-btn);
    padding: 0 12px;
    font-size: 15px;
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group textarea {
    height: auto;
    padding: 10px 12px;
    resize: vertical;
    line-height: 1.5;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 95, 122, 0.15);
}
.form-privacy {
    font-size: 13px;
    color: var(--color-text-secondary);
    text-align: center;
    margin-top: 12px;
    margin-bottom: 0;
}

@media (max-width: 1024px) {
    .main-nav {
        display: none;
    }
    .header-actions {
        display: none;
    }
    .mobile-toggle {
        display: flex;
    }
    .mega-panel {
        width: 560px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .steps-timeline {
        flex-direction: column;
        gap: 0;
    }
    .step-line {
        width: 2px;
        height: 24px;
        margin-left: 28px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    .article-header {
        padding: 36px 0 24px;
    }
    .article-header h1 {
        font-size: 28px;
    }
    .article-meta {
        gap: 12px 16px;
    }
    .article-body-section {
        padding: 32px 0 40px;
    }
    .steps-section {
        padding: 56px 0;
    }
    .steps-section h2 {
        font-size: 24px;
    }
    .step-item {
        padding: 24px 20px;
    }
    .related-section {
        padding: 56px 0;
    }
    .related-section h2 {
        font-size: 24px;
    }
    .cta-section {
        padding: 48px 0;
    }
    .cta-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 28px;
    }
    .cta-card .btn {
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .footer-bottom {
        flex-direction: column;
    }
    .modal-card {
        padding: 24px;
    }
}

@media (max-width: 520px) {
    .brand-logo {
        font-size: 18px;
    }
    .logo-icon {
        width: 28px;
        height: 28px;
    }
    .header-inner {
        height: 56px;
        gap: 12px;
    }
    .site-header {
        height: 56px;
    }
    .article-header h1 {
        font-size: 24px;
    }
    .steps-timeline {
        margin-top: 28px;
    }
    .step-num {
        font-size: 32px;
    }
}