/* roulang page: index */
:root {
            --primary: #3A7BD5;
            --primary-deep: #2A5DB4;
            --primary-soft: #EAF1FB;
            --accent: #BF9B5F;
            --bg: #F7F9FC;
            --card: #FFFFFF;
            --title: #16233D;
            --body: #40506B;
            --muted: #7C8AA0;
            --border: #E4E9F0;
            --radius-card: 14px;
            --radius-btn: 999px;
            --shadow-rest: 0 1px 2px rgba(20,35,60,.04), 0 4px 16px rgba(20,35,60,.06);
            --shadow-hover: 0 4px 12px rgba(20,35,60,.08), 0 12px 32px rgba(20,35,60,.12);
            --space-section: 96px;
            --space-section-md: 64px;
            --space-section-sm: 48px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Inter, Arial, sans-serif;
            background-color: var(--bg);
            color: var(--body);
            font-size: 16px;
            line-height: 1.75;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input {
            font-family: inherit;
        }

        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding-left: max(24px, 5vw);
            padding-right: max(24px, 5vw);
        }

        .container-narrow {
            max-width: 800px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

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

        h1 {
            font-size: clamp(36px, 4.5vw, 56px);
            line-height: 1.2;
            font-weight: 750;
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: clamp(26px, 3vw, 34px);
            line-height: 1.3;
            margin-bottom: 20px;
        }

        h3 {
            font-size: clamp(18px, 1.6vw, 22px);
            line-height: 1.4;
            font-weight: 650;
        }

        p {
            margin-bottom: 0;
        }

        .text-muted {
            color: var(--muted);
        }

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

        .section-sm {
            padding-top: var(--space-section-md);
            padding-bottom: var(--space-section-md);
        }

        /* ==== NAVIGATION ==== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

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

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

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .brand-mark span {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.5px;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--title);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

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

        .main-nav a {
            font-size: 15px;
            font-weight: 450;
            color: var(--body);
            position: relative;
            padding: 8px 0;
            transition: color 0.2s ease;
            outline-offset: 4px;
        }

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

        .main-nav a.active {
            color: var(--primary);
            font-weight: 700;
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .main-nav a:focus-visible {
            outline: 2px solid var(--primary);
            border-radius: 4px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--primary-deep);
            box-shadow: 0 8px 20px rgba(58, 123, 213, 0.25);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: #fff;
            font-size: 18px;
            color: var(--title);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            z-index: 200;
            padding: 32px 24px;
            flex-direction: column;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
            display: flex;
        }

        .mobile-menu .close-btn {
            align-self: flex-end;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: #fff;
            font-size: 18px;
            color: var(--title);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 32px;
        }

        .mobile-menu nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-menu nav a {
            font-size: 22px;
            font-weight: 600;
            color: var(--title);
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            line-height: 2.2;
        }

        .mobile-menu nav a.active {
            color: var(--primary);
        }

        .mobile-menu .mobile-contact {
            margin-top: auto;
            padding-top: 24px;
            font-size: 14px;
            color: var(--muted);
            line-height: 2;
        }

        /* ==== BUTTONS ==== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            transition: all 0.2s ease;
            white-space: nowrap;
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 1.5px solid var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-deep);
            border-color: var(--primary-deep);
            box-shadow: 0 8px 20px rgba(58, 123, 213, 0.25);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: #234A96;
            transform: translateY(0);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-soft);
        }

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

        .btn-sm {
            height: 40px;
            padding: 0 22px;
            font-size: 14px;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            transition: gap 0.2s ease;
        }

        .text-link:hover {
            gap: 10px;
        }

        .text-link .arrow {
            font-size: 14px;
            transition: transform 0.2s ease;
        }

        .text-link:hover .arrow {
            transform: translateX(2px);
        }

        /* ==== HERO ==== */
        .hero {
            padding-top: 80px;
            padding-bottom: 60px;
            background: linear-gradient(180deg, #F7F9FC 0%, #EDF3FA 100%);
            position: relative;
            overflow: hidden;
        }

        .hero .container {
            display: grid;
            grid-template-columns: 6fr 6fr;
            gap: 48px;
            align-items: center;
        }

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

        .hero-content .tagline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-soft);
            color: var(--primary-deep);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 24px;
        }

        .hero-content h1 {
            margin-bottom: 20px;
        }

        .hero-content .subtitle {
            font-size: 18px;
            line-height: 1.75;
            color: var(--body);
            margin-bottom: 32px;
            max-width: 480px;
        }

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

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

        .hero-image .img-wrap {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 4 / 3;
        }

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

        .hero-image::before {
            content: "";
            position: absolute;
            top: -20px;
            right: -20px;
            width: 60%;
            height: 60%;
            background: var(--primary-soft);
            border-radius: 24px;
            z-index: -1;
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

        .hero-stats .stat {
            text-align: left;
        }

        .hero-stats .num {
            font-size: 28px;
            font-weight: 750;
            color: var(--accent);
            line-height: 1.3;
        }

        .hero-stats .label {
            font-size: 13px;
            color: var(--muted);
            margin-top: 4px;
        }

        /* ==== TRUST BAR ==== */
        .trust-bar {
            background: #fff;
            border-bottom: 1px solid var(--border);
        }

        .trust-bar .inner {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            padding: 32px 0;
        }

        .trust-item {
            text-align: center;
            position: relative;
            padding: 8px 16px;
        }

        .trust-item:not(:last-child)::after {
            content: "";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 40px;
            background: var(--border);
        }

        .trust-item .icon {
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .trust-item .title {
            font-size: 14px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 4px;
        }

        .trust-item .desc {
            font-size: 12px;
            color: var(--muted);
            line-height: 1.5;
        }

        /* ==== FEATURES ==== */
        .features-grid {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 24px;
        }

        .feature-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-rest);
            padding: 32px;
            transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
            border-left: 3px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 0;
            background: var(--primary);
            transition: height 0.3s ease;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .feature-card:hover::before {
            height: 100%;
        }

        .feature-card.large {
            display: flex;
            align-items: center;
            gap: 28px;
            min-height: 100%;
        }

        .feature-card .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 12px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 24px;
            color: var(--primary);
        }

        .feature-card .feature-body h3 {
            margin-bottom: 8px;
        }

        .feature-card .feature-body p {
            font-size: 15px;
            color: var(--body);
            line-height: 1.7;
            max-width: 460px;
        }

        .feature-card.small {
            padding: 24px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .feature-card.small .feature-icon {
            width: 48px;
            height: 48px;
            font-size: 18px;
        }

        .feature-card.small h3 {
            font-size: 18px;
            margin-bottom: 4px;
        }

        .feature-card.small p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        .right-stack {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .right-stack .feature-card:first-child {
            flex: 1;
        }

        .right-stack .feature-card:last-child {
            flex: 1;
        }

        /* ==== SCENARIOS ==== */
        .scenario-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 96px;
        }

        .scenario-block:last-child {
            margin-bottom: 0;
        }

        .scenario-block.reverse .scenario-img {
            order: 2;
        }

        .scenario-block.reverse .scenario-text {
            order: 1;
        }

        .scenario-img {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 16/10;
            min-height: 360px;
        }

        .scenario-img::after {
            content: "";
            position: absolute;
            bottom: -12px;
            left: -12px;
            width: 60%;
            height: 60%;
            background: var(--primary-soft);
            border-radius: 16px;
            z-index: -1;
        }

        .scenario-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 16px;
            position: relative;
            z-index: 1;
        }

        .scenario-text h2 {
            margin-bottom: 16px;
        }

        .scenario-text>p {
            margin-bottom: 24px;
            color: var(--body);
            line-height: 1.75;
        }

        .scenario-list {
            list-style: none;
            margin-bottom: 28px;
        }

        .scenario-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            line-height: 1.6;
            color: var(--title);
            padding: 6px 0;
        }

        .scenario-list li::before {
            content: "";
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-soft);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%233A7BD5'%3E%3Cpath d='M6 11.17L2.83 8 1.75 9.08 6 13.33 14.25 5.08 13.17 4z'/%3E%3C/svg%3E");
            background-size: 12px;
            background-position: center;
            background-repeat: no-repeat;
        }

        /* ==== SOCIAL PROOF ==== */
        .social-proof {
            background: var(--primary-soft);
        }

        .proof-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 64px;
        }

        .proof-stat {
            text-align: center;
            padding: 24px 16px;
            background: rgba(255, 255, 255, 0.6);
            border-radius: var(--radius-card);
        }

        .proof-stat .num {
            font-size: 36px;
            font-weight: 750;
            color: var(--accent);
            line-height: 1.2;
        }

        .proof-stat .label {
            font-size: 13px;
            color: var(--muted);
            margin-top: 8px;
        }

        .proof-quote {
            max-width: 720px;
            margin: 0 auto 56px;
            background: var(--card);
            border-radius: 16px;
            padding: 48px;
            box-shadow: var(--shadow-rest);
            text-align: center;
        }

        .proof-quote .quote-mark {
            font-size: 48px;
            color: var(--accent);
            margin-bottom: 16px;
            line-height: 1;
        }

        .proof-quote blockquote {
            font-size: 18px;
            line-height: 1.7;
            color: var(--title);
            margin-bottom: 24px;
            font-weight: 450;
        }

        .proof-quote .author {
            font-size: 14px;
            color: var(--muted);
        }

        .proof-logos {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .logo-placeholder {
            height: 48px;
            padding: 0 28px;
            background: rgba(255, 255, 255, 0.7);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--muted);
            opacity: 0.5;
            transition: opacity 0.3s ease;
            flex: 1;
            min-width: 120px;
            border: 1px solid var(--border);
        }

        .logo-placeholder:hover {
            opacity: 1;
        }

        /* ==== NEWS ==== */
        .news-list {
            margin-top: 40px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 24px 8px;
            border-bottom: 1px solid var(--border);
            transition: background 0.2s ease;
            border-radius: 10px;
        }

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

        .news-item:hover {
            background: var(--primary-soft);
        }

        .news-item .date-block {
            width: 64px;
            height: 72px;
            background: var(--card);
            border-radius: 10px;
            box-shadow: var(--shadow-rest);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .news-item .date-block .day {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .news-item .date-block .month {
            font-size: 12px;
            color: var(--muted);
        }

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

        .news-item .news-info h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: color 0.2s ease;
        }

        .news-item:hover .news-info h3 {
            color: var(--primary);
        }

        .news-item .news-info p {
            font-size: 14px;
            color: var(--muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

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

        .news-item .badge {
            display: inline-flex;
            align-items: center;
            height: 22px;
            padding: 0 10px;
            border-radius: 6px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
        }

        .news-item .arrow-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .news-item:hover .arrow-icon {
            background: var(--primary);
            color: #fff;
        }

        .news-empty {
            text-align: center;
            padding: 64px 24px;
        }

        .news-empty .empty-icon {
            width: 72px;
            height: 72px;
            border-radius: 20px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 28px;
            color: var(--primary);
        }

        .news-empty p {
            color: var(--muted);
        }

        .news-more {
            text-align: center;
            margin-top: 32px;
        }

        /* ==== FAQ ==== */
        .faq-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-rest);
            padding: 8px 32px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 24px 0;
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            width: 100%;
            text-align: left;
            padding: 0;
            background: none;
        }

        .faq-q h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--title);
            transition: color 0.2s ease;
        }

        .faq-q:hover h3 {
            color: var(--primary);
        }

        .faq-q .plus {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 48px 0 0;
        }

        .faq-item.open .faq-a {
            max-height: 300px;
            padding-top: 16px;
        }

        .faq-a p {
            font-size: 15px;
            line-height: 1.7;
            color: var(--muted);
        }

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

        .cta-block {
            background: var(--primary-soft);
            border-radius: 20px;
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
        }

        .cta-block h2 {
            margin-bottom: 12px;
        }

        .cta-block p {
            font-size: 16px;
            color: var(--body);
            margin-bottom: 32px;
        }

        /* ==== FOOTER ==== */
        .site-footer {
            border-top: 1px solid var(--border);
            background: #fff;
            padding-top: 64px;
        }

        .footer-cols {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .brand-text {
            font-size: 22px;
            margin-bottom: 16px;
            display: inline-block;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }

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

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--muted);
            transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
        }

        .footer-social a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
        }

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

        .footer-links a {
            font-size: 14px;
            color: var(--muted);
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-contact {
            list-style: none;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .footer-contact li i {
            width: 16px;
            text-align: center;
            margin-top: 4px;
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: var(--muted);
        }

        /* ==== FIXED BAR ==== */
        .fixed-bar {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%) translateY(120%);
            width: calc(100% - 48px);
            max-width: 1152px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 14px;
            box-shadow: var(--shadow-hover);
            border: 1px solid var(--border);
            padding: 16px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            z-index: 150;
            transition: transform 0.4s ease;
        }

        .fixed-bar.visible {
            transform: translateX(-50%) translateY(0);
        }

        .fixed-bar .bar-text {
            font-size: 14px;
            color: var(--title);
            font-weight: 600;
        }

        .fixed-bar .bar-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .fixed-bar .bar-phone {
            font-size: 14px;
            color: var(--primary);
            font-weight: 600;
        }

        .fixed-bar .btn {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        body {
            padding-bottom: 72px;
        }

        /* ==== RESPONSIVE ==== */
        @media (max-width: 1023px) {
            :root {
                --space-section: 64px;
            }

            .main-nav {
                gap: 20px;
            }

            .main-nav a {
                font-size: 14px;
            }

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

            .hero-content {
                text-align: left;
            }

            .hero-stats {
                gap: 32px;
            }

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

            .right-stack {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }

            .scenario-block,
            .scenario-block.reverse {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .scenario-img {
                min-height: 300px;
            }

            .scenario-block.reverse .scenario-img {
                order: 0;
            }

            .scenario-block.reverse .scenario-text {
                order: 0;
            }

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

            .footer-cols {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767px) {
            .main-nav {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .trust-bar .inner {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

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

            .trust-item {
                padding: 8px;
            }

            .right-stack {
                grid-template-columns: 1fr;
            }

            .feature-card.large {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-stats {
                flex-wrap: wrap;
                gap: 20px;
            }

            .hero-stats .stat {
                flex: 1;
                min-width: 100px;
            }

            .news-item {
                flex-wrap: wrap;
                gap: 12px;
            }

            .news-item .date-block {
                width: 56px;
                height: 60px;
            }

            .news-item .news-info h3 {
                font-size: 16px;
                white-space: normal;
            }

            .news-item .news-info p {
                white-space: normal;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
            }

            .news-item .news-meta {
                width: 100%;
                justify-content: flex-end;
            }

            .faq-card {
                padding: 8px 20px;
            }

            .cta-block {
                padding: 48px 24px;
            }

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

            .fixed-bar {
                bottom: 0;
                left: 0;
                right: 0;
                transform: translateY(100%);
                width: 100%;
                max-width: 100%;
                border-radius: 0;
                padding: 0;
                height: 60px;
                border: none;
                border-top: 1px solid var(--border);
                justify-content: center;
            }

            .fixed-bar.visible {
                transform: translateY(0);
            }

            .fixed-bar .bar-text,
            .fixed-bar .bar-phone {
                display: none;
            }

            .fixed-bar .bar-actions {
                width: 100%;
                gap: 0;
            }

            .fixed-bar .btn {
                flex: 1;
                height: 60px;
                border-radius: 0;
                padding: 0;
            }

            .fixed-bar .btn-secondary {
                border: none;
                border-right: 1px solid var(--border);
                background: #fff;
            }

            body {
                padding-bottom: 120px;
            }
        }

        @media (max-width: 520px) {
            .hero {
                padding-top: 48px;
            }

            h1 {
                font-size: 32px;
            }

            .hero-content .subtitle {
                font-size: 16px;
            }

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

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

            .hero-stats .num {
                font-size: 24px;
            }

            .proof-stats {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .proof-quote {
                padding: 32px 20px;
            }

            .section {
                --space-section: 48px;
            }

            .cta-block {
                padding: 40px 20px;
            }

            .brand-text {
                font-size: 17px;
            }
        }

/* roulang page: article */
:root {
            --primary: #3A7BD5;
            --primary-deep: #2A5DB4;
            --primary-soft: #EAF1FB;
            --accent: #BF9B5F;
            --bg: #F7F9FC;
            --card: #FFFFFF;
            --text-title: #16233D;
            --text-body: #40506B;
            --text-muted: #7C8AA0;
            --border: #E4E9F0;
            --radius-card: 14px;
            --radius-btn: 999px;
            --shadow-rest: 0 1px 2px rgba(20, 35, 60, .04), 0 4px 16px rgba(20, 35, 60, .06);
            --shadow-hover: 0 4px 12px rgba(20, 35, 60, .08), 0 12px 32px rgba(20, 35, 60, .12);
            --space-section: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding-left: 5vw;
            padding-right: 5vw;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
            background: rgba(255, 255, 255, .95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

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

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

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
        }

        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-title);
            letter-spacing: .01em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: auto;
        }

        .main-nav a {
            font-size: 15px;
            font-weight: 450;
            color: var(--text-body);
            position: relative;
            padding: 6px 0;
        }

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

        .main-nav a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        .main-nav a.active {
            color: var(--primary);
            font-weight: 700;
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 16px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        .nav-cta {
            flex-shrink: 0;
            height: 40px;
            padding: 0 22px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background .2s ease, box-shadow .2s ease, transform .2s ease;
        }

        .nav-cta:hover {
            background: var(--primary-deep);
            box-shadow: 0 8px 20px rgba(58, 123, 213, .25);
            transform: translateY(-1px);
            color: #fff;
        }

        .nav-cta:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: var(--text-title);
            font-size: 20px;
            border: 1px solid var(--border);
        }

        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
        }

        .nav-mobile-contact {
            display: none;
        }

        .page-banner {
            background: linear-gradient(180deg, #F0F4FA 0%, #F7F9FC 100%);
            border-bottom: 1px solid var(--border);
            padding: 56px 0 32px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
        }

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

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

        .breadcrumb .current {
            color: var(--text-body);
            font-weight: 500;
            max-width: 360px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .banner-meta {
            margin-top: 28px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            height: 22px;
            padding: 0 12px;
            border-radius: var(--radius-btn);
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: .02em;
        }

        .article-container {
            padding-top: 48px;
            padding-bottom: 64px;
        }

        .article-main {
            max-width: 800px;
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: 32px;
        }

        .article-header h1 {
            font-size: 38px;
            line-height: 1.3;
            font-weight: 750;
            color: var(--text-title);
            letter-spacing: -0.01em;
            overflow-wrap: break-word;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 20px;
            color: var(--text-muted);
            font-size: 14px;
        }

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

        .article-meta .meta-item i {
            font-size: 13px;
            opacity: .85;
        }

        .article-cover {
            margin-bottom: 40px;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .article-cover img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #eef2f6;
        }

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

        .article-body p {
            margin-bottom: 24px;
            max-width: 800px;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-title);
            margin: 40px 0 16px;
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 18px;
            font-weight: 650;
            color: var(--text-title);
            margin: 32px 0 12px;
            line-height: 1.5;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 24px;
            padding-left: 22px;
        }

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

        .article-body blockquote {
            margin: 28px 0;
            padding: 20px 22px;
            background: var(--primary-soft);
            border-left: 4px solid var(--primary);
            border-radius: 8px;
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.8;
        }

        .article-body blockquote p {
            margin-bottom: 0;
        }

        .article-body img {
            width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 28px 0 12px;
        }

        .article-body a {
            color: var(--primary);
            border-bottom: 1px solid var(--primary);
            transition: color .2s ease, border-color .2s ease;
        }

        .article-body a:hover {
            color: var(--primary-deep);
            border-color: transparent;
        }

        .article-body table {
            width: 100%;
            margin: 24px 0;
            border-collapse: collapse;
            font-size: 15px;
        }

        .article-body table th,
        .article-body table td {
            padding: 10px 14px;
            border-bottom: 1px solid var(--border);
            text-align: left;
        }

        .article-body code {
            background: #F0F3F8;
            border-radius: 6px;
            padding: 2px 6px;
            font-size: 14px;
        }

        .not-found-panel {
            text-align: center;
            padding: 64px 24px;
            background: var(--card);
            border-radius: 16px;
            box-shadow: var(--shadow-rest);
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--primary);
            font-size: 28px;
        }

        .not-found-panel h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 8px;
        }

        .not-found-panel p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            background: var(--primary);
            color: #fff !important;
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: background .2s ease, box-shadow .2s ease, transform .2s ease;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--primary-deep);
            box-shadow: 0 8px 20px rgba(58, 123, 213, .25);
            transform: translateY(-1px);
            color: #fff !important;
        }

        .btn-primary:active {
            background: #1f4a94;
            transform: none;
        }

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

        .related-section {
            background: var(--card);
            border-top: 1px solid var(--border);
            padding-top: 64px;
            padding-bottom: 56px;
        }

        .related-section .container {
            max-width: 900px;
        }

        .related-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 32px;
        }

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

        .related-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg);
            border-radius: 14px;
            padding: 12px;
            box-shadow: 0 1px 2px rgba(20, 35, 60, .03);
            transition: box-shadow .2s ease, transform .2s ease;
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .related-card:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .related-card img {
            width: 96px;
            height: 96px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
            background: #eef2f6;
        }

        .related-info {
            min-width: 0;
        }

        .related-info h3 {
            font-size: 15px;
            font-weight: 650;
            color: var(--text-title);
            line-height: 1.4;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        .back-section {
            padding-top: 40px;
            padding-bottom: 64px;
            max-width: 900px;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: color .2s ease, gap .2s ease;
        }

        .back-link i {
            transition: transform .2s ease;
        }

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

        .back-link:hover i {
            transform: translateX(-3px);
        }

        .back-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        .cta-section {
            padding: 0 5vw 64px;
            max-width: 1152px;
            margin: 0 auto;
        }

        .cta-block {
            background: var(--primary-soft);
            border-radius: 20px;
            padding: 56px 40px;
            text-align: center;
        }

        .cta-block h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 10px;
        }

        .cta-block p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 28px;
        }

        .site-footer {
            background: var(--card);
            border-top: 1px solid var(--border);
        }

        .site-footer .container {
            max-width: 1152px;
            margin: 0 auto;
            padding-left: 5vw;
            padding-right: 5vw;
        }

        .footer-cols {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding: 64px 0 48px;
        }

        .footer-brand .brand-text {
            font-size: 18px;
            color: var(--text-title);
            font-weight: 700;
            margin-bottom: 12px;
            display: block;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 260px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 14px;
            transition: border-color .2s ease, color .2s ease, background .2s ease;
        }

        .footer-social a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .footer-social a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .site-footer h4 {
            font-size: 15px;
            font-weight: 650;
            color: var(--text-title);
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-links a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .footer-contact li i {
            width: 16px;
            text-align: center;
            color: var(--primary);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
        }

        .footer-bottom .container {
            display: flex;
            justify-content: center;
            align-items: center;
        }

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

        .mobile-fixed-bar {
            display: none;
        }

        @media (max-width: 1023px) {
            .footer-cols {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .related-grid {
                gap: 16px;
            }

            .related-card img {
                width: 84px;
                height: 84px;
            }

            .article-header h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 767px) {
            body {
                padding-bottom: 72px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(255, 255, 255, .98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                align-items: flex-start;
                justify-content: flex-start;
                gap: 0;
                padding: 40px 5vw;
                margin: 0;
                transform: translateX(100%);
                transition: transform .3s ease;
                z-index: 99;
                overflow-y: auto;
            }

            .site-header.nav-open .main-nav {
                transform: translateX(0);
            }

            .main-nav a {
                display: block;
                width: 100%;
                font-size: 22px;
                line-height: 2.2;
                color: var(--text-title);
                border-bottom: 1px solid var(--border);
            }

            .main-nav a.active::after {
                display: none;
            }

            .nav-mobile-contact {
                display: flex;
                flex-direction: column;
                gap: 8px;
                margin-top: 40px;
                font-size: 14px;
                color: var(--text-muted);
            }

            .nav-mobile-contact a {
                font-size: 18px;
                border: none;
                color: var(--primary);
                line-height: 1.5;
            }

            .nav-cta {
                display: none;
            }

            .page-banner {
                padding: 36px 0 24px;
            }

            .breadcrumb .current {
                max-width: 220px;
            }

            .article-container {
                padding-top: 32px;
                padding-bottom: 40px;
            }

            .article-header h1 {
                font-size: 26px;
                line-height: 1.35;
            }

            .article-meta {
                gap: 14px;
                font-size: 13px;
            }

            .article-body {
                font-size: 15px;
                line-height: 1.85;
            }

            .article-body blockquote {
                font-size: 15px;
                padding: 16px 18px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .related-card img {
                width: 96px;
                height: 96px;
            }

            .back-section {
                padding-top: 24px;
                padding-bottom: 40px;
            }

            .cta-section {
                padding-bottom: 40px;
            }

            .cta-block {
                padding: 40px 24px;
            }

            .cta-block h2 {
                font-size: 22px;
            }

            .footer-cols {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 48px 0 32px;
            }

            .mobile-fixed-bar {
                display: flex;
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                height: 60px;
                background: rgba(255, 255, 255, .98);
                border-top: 1px solid var(--border);
                z-index: 90;
            }

            .mobile-fixed-bar .bar-btn {
                flex: 1;
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 14px;
                font-weight: 600;
                gap: 8px;
            }

            .bar-outline {
                color: var(--primary);
                border-right: 1px solid var(--border);
            }

            .bar-solid {
                background: var(--primary);
                color: #fff;
            }

            .bar-solid:hover {
                background: var(--primary-deep);
                color: #fff;
            }
        }

        @media (max-width: 520px) {
            .related-card img {
                width: 80px;
                height: 80px;
            }

            .article-meta .meta-item+.meta-item::before {
                display: none;
            }

            .page-banner {
                padding: 28px 0 20px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #3A7BD5;
            --primary-deep: #2A5DB4;
            --primary-soft: #EAF1FB;
            --accent: #BF9B5F;
            --bg: #F7F9FC;
            --card: #FFFFFF;
            --heading: #16233D;
            --text: #40506B;
            --muted: #7C8AA0;
            --border: #E4E9F0;
            --radius-card: 14px;
            --radius-btn: 999px;
            --shadow-rest: 0 1px 2px rgba(20, 35, 60, .04), 0 4px 16px rgba(20, 35, 60, .06);
            --shadow-hover: 0 4px 12px rgba(20, 35, 60, .08), 0 12px 32px rgba(20, 35, 60, .12);
            --space-section: 96px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }
        button {
            border: none;
            background: none;
            font-family: inherit;
            cursor: pointer;
        }
        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: 72px;
        }
        .site-header .inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(58, 123, 213, .25);
        }
        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--heading);
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            gap: 32px;
            align-items: center;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 450;
            color: var(--text);
            position: relative;
            padding: 8px 2px;
            transition: color .2s;
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            height: 38px;
            padding: 0 24px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: background .2s, box-shadow .2s, transform .2s;
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--primary-deep);
            box-shadow: 0 6px 20px rgba(58, 123, 213, .28);
            transform: translateY(-1px);
        }
        .nav-cta:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .nav-toggle {
            display: none;
            font-size: 20px;
            color: var(--heading);
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            transition: background .2s;
        }
        .nav-toggle:hover {
            background: var(--primary-soft);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(180deg, #EEF3FA 0%, #F7F9FC 100%);
            padding: 72px 0 64px;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            border: 40px solid rgba(58, 123, 213, .05);
            pointer-events: none;
        }
        .page-hero .breadcrumb {
            display: flex;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 20px;
            align-items: center;
        }
        .page-hero .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
        }
        .page-hero .breadcrumb a:hover {
            color: var(--primary-deep);
        }
        .page-hero .breadcrumb span {
            color: var(--muted);
        }
        .page-hero h1 {
            font-size: 42px;
            line-height: 1.2;
            font-weight: 750;
            color: var(--heading);
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .page-hero .hero-desc {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            max-width: 680px;
            margin-bottom: 32px;
        }
        .page-hero .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 32px;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: background .2s, box-shadow .2s, transform .2s;
            border: none;
            box-shadow: 0 4px 12px rgba(58, 123, 213, .2);
        }
        .btn-primary:hover {
            background: var(--primary-deep);
            box-shadow: 0 8px 24px rgba(58, 123, 213, .3);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(58, 123, 213, .2);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 32px;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            border: 1.5px solid var(--primary);
            transition: background .2s, transform .2s;
        }
        .btn-outline:hover {
            background: var(--primary-soft);
            transform: translateY(-1px);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== Section base ===== */
        .section {
            padding: var(--space-section) 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-soft);
            padding: 4px 14px;
            border-radius: var(--radius-btn);
            margin-bottom: 12px;
            letter-spacing: .5px;
        }
        .section-title {
            font-size: 30px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 40px;
        }

        /* ===== Content Cards ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .content-card {
            background: var(--card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-rest);
            transition: box-shadow .25s ease, transform .25s ease;
        }
        .content-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .content-card .card-img {
            overflow: hidden;
            position: relative;
            aspect-ratio: 16/10;
        }
        .content-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .35s ease;
        }
        .content-card:hover .card-img img {
            transform: scale(1.03);
        }
        .content-card .card-body {
            padding: 24px;
        }
        .content-card .card-body h3 {
            font-size: 19px;
            font-weight: 650;
            color: var(--heading);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .content-card .card-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap .2s ease;
        }
        .card-link:hover {
            gap: 10px;
            color: var(--primary-deep);
        }
        .card-link i {
            font-size: 12px;
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--card);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .feature-item {
            padding: 36px 32px;
            border-radius: var(--radius-card);
            background: var(--bg);
            border: 1px solid transparent;
            transition: border-color .2s, box-shadow .2s, transform .2s;
        }
        .feature-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-rest);
            transform: translateY(-2px);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 20px;
        }
        .feature-item h3 {
            font-size: 19px;
            font-weight: 650;
            color: var(--heading);
            margin-bottom: 10px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-rest);
            overflow: hidden;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--heading);
            cursor: pointer;
            transition: background .2s;
            gap: 16px;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            background: var(--primary-soft);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-toggle {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 14px;
            color: var(--primary);
            transition: transform .3s ease, background .2s;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-answer-inner {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--muted);
            line-height: 1.75;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--space-section) 0;
        }
        .cta-inner {
            background: linear-gradient(135deg, #EAF1FB 0%, #F0F5FC 60%, #F7F9FC 100%);
            border-radius: 20px;
            padding: 64px 48px;
            text-align: center;
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -50px;
            left: -50px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            border: 24px solid rgba(58, 123, 213, .06);
        }
        .cta-inner h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--heading);
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .cta-inner p {
            font-size: 15px;
            color: var(--text);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--heading);
            color: rgba(255, 255, 255, .8);
            padding-top: 64px;
        }
        .site-footer .brand-text {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .site-footer p {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-cols {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, .7);
            font-size: 15px;
            transition: all .2s;
        }
        .footer-social a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .site-footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            transition: color .2s;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            font-size: 14px;
            color: var(--primary);
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
            margin: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-cols {
                grid-template-columns: 1fr 1fr;
            }
            .main-nav {
                gap: 20px;
            }
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 767px) {
            :root {
                --space-section: 48px;
            }
            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                gap: 0;
                padding: 16px 24px 32px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px rgba(20, 35, 60, .1);
                transform: translateY(-120%);
                transition: transform .3s ease;
                align-items: stretch;
                z-index: 99;
                max-height: calc(100vh - 72px);
                overflow-y: auto;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .main-nav a {
                font-size: 18px;
                padding: 14px 0;
                border-bottom: 1px solid var(--border);
                font-weight: 500;
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .main-nav a.active::after {
                left: 0;
                transform: none;
                width: 20px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .page-hero {
                padding: 48px 0 40px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
            }
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-cols {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-inner {
                padding: 40px 24px;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 20px 20px;
                font-size: 14px;
            }
            .logo-wall {
                grid-template-columns: repeat(2, 1fr) !important;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .brand-text {
                font-size: 15px;
            }
            .brand-mark {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
        }

        /* ===== Utility ===== */
        .text-muted {
            color: var(--muted);
        }
        .text-accent-num {
            color: var(--accent);
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }