:root {
            --primary: #2d6a4f;
            --primary-dark: #1b4332;
            --primary-light: #d8f3dc;
            --accent: #b08968;
            --accent-dark: #8b5e34;
            --bg: #faf8f5;
            --text: #1f2937;
            --text-light: #6b7280;
            --border: #e5e7eb;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
            --container: 1200px;
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ===== Header Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 16px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
        }
        .brand-logo .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 2px 10px rgba(45, 106, 79, 0.3);
        }
        .brand-logo .logo-text {
            font-size: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-dark), var(--accent-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            position: relative;
            padding: 6px 2px;
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            border-radius: 2px;
            background: var(--primary);
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 9px 22px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(45, 106, 79, 0.25);
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(45, 106, 79, 0.35);
        }
        .nav-cta:focus,
        .nav-links a:focus {
            outline: 3px solid rgba(45, 106, 79, 0.3);
            outline-offset: 2px;
        }
        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 90px 0 80px;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.28;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27, 67, 50, 0.95) 0%, rgba(27, 67, 50, 0.75) 60%, rgba(45, 106, 79, 0.55) 100%);
        }
        .hero-inner {
            position: relative;
            z-index: 2;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            backdrop-filter: blur(6px);
        }
        .hero h1 {
            color: #fff;
            font-size: 42px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .hero-desc {
            color: rgba(255, 255, 255, 0.88);
            font-size: 16px;
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .team-progress {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 28px;
            backdrop-filter: blur(8px);
            max-width: 500px;
        }
        .team-progress-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
        }
        .team-progress-head span {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
        }
        .team-progress-head strong {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }
        .progress-track {
            height: 8px;
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.15);
            overflow: hidden;
            margin-bottom: 12px;
        }
        .progress-fill {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, #d4a373, #f4e4d0);
            transition: width 1s ease;
        }
        .team-progress-note {
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.4);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(176, 137, 104, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(176, 137, 104, 0.45);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
        }
        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .btn-dark {
            background: var(--primary-dark);
            color: #fff;
            width: 100%;
        }
        .btn-dark:hover {
            background: #0d2419;
            transform: translateY(-1px);
        }
        .join-card {
            background: rgba(255, 255, 255, 0.97);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-lg);
        }
        .join-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--primary-dark);
        }
        .join-avatars {
            display: flex;
            align-items: center;
            margin-bottom: 16px;
        }
        .avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            border: 3px solid #fff;
            margin-left: -10px;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
        }
        .avatar:first-child {
            margin-left: 0;
        }
        .avatar:nth-child(2n) {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        }
        .avatar.more {
            background: #e5e7eb;
            color: var(--text-light);
            font-size: 11px;
            font-weight: 700;
        }
        .join-info {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
            padding: 12px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            margin-bottom: 16px;
        }
        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-light {
            background: #fff;
        }
        .section-head {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }
        .section-head .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 5px 14px;
            border-radius: 50px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-head p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.6;
        }
        /* ===== Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 18px;
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        /* ===== Topic Cards ===== */
        .topic-section {
            background: var(--primary-dark);
            position: relative;
        }
        .topic-section .section-head .section-tag {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }
        .topic-section .section-head h2 {
            color: #fff;
        }
        .topic-section .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .topic-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .topic-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .topic-card .topic-img {
            height: 160px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .topic-card .topic-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.35));
        }
        .topic-card .topic-body {
            padding: 20px;
        }
        .topic-card .topic-body h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .topic-card .topic-body p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.55;
        }
        .topic-card .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
        }
        .topic-card .topic-link:hover {
            color: var(--accent-dark);
            gap: 8px;
        }
        .topic-card .topic-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.9);
            color: var(--primary-dark);
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 20px;
            backdrop-filter: blur(4px);
        }
        /* ===== Stats ===== */
        .stats-section {
            padding: 60px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stat-item {
            padding: 20px;
        }
        .stat-number {
            font-size: 46px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .stat-number span {
            font-size: 24px;
            margin-left: 2px;
        }
        .stat-label {
            font-size: 15px;
            color: var(--text-light);
        }
        /* ===== Testimonials ===== */
        .testi-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testi-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }
        .testi-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .testi-card .quote-mark {
            font-size: 40px;
            line-height: 1;
            color: var(--accent);
            opacity: 0.4;
            margin-bottom: 10px;
            font-family: Georgia, serif;
        }
        .testi-card .testi-text {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text);
            margin-bottom: 20px;
        }
        .testi-card .testi-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testi-card .testi-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }
        .testi-card .testi-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }
        .testi-card .testi-meta {
            font-size: 12px;
            color: var(--text-light);
        }
        /* ===== News ===== */
        .news-grid {
            display: grid;
            grid-template-columns: 1fr 0.45fr;
            gap: 40px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
        }
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover .news-title {
            color: var(--primary);
        }
        .news-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 3px 10px;
            border-radius: 20px;
            white-space: nowrap;
            margin-top: 3px;
        }
        .news-content {
            flex: 1;
        }
        .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            transition: var(--transition);
        }
        .news-title:hover {
            color: var(--primary);
        }
        .news-desc {
            font-size: 13px;
            color: var(--text-light);
            margin-top: 4px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-date {
            font-size: 12px;
            color: var(--text-light);
            display: block;
            margin-top: 6px;
        }
        .news-side {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .recommend-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .recommend-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .recommend-card .rec-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-dark);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .recommend-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .recommend-card p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.55;
            margin-bottom: 12px;
        }
        .recommend-card .rec-meta {
            font-size: 12px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .rec-image {
            width: 100%;
            height: 120px;
            border-radius: var(--radius-md);
            background-size: cover;
            background-position: center;
            margin-bottom: 12px;
        }
        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            color: var(--text);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 24px;
            font-weight: 400;
            color: var(--primary);
            transition: transform 0.3s ease;
            line-height: 1;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            top: -100px;
            right: -60px;
        }
        .cta-inner {
            display: grid;
            grid-template-columns: 1fr 0.8fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .cta-left h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .cta-left p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .cta-points {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .cta-point {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            font-size: 13px;
            padding: 6px 16px;
            border-radius: 30px;
        }
        .cta-form {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-lg);
        }
        .cta-form h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }
        .cta-form .form-subtitle {
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
            display: block;
            margin-bottom: 6px;
        }
        .form-group input {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            background: var(--bg);
            transition: var(--transition);
        }
        .form-group input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.15);
            background: #fff;
        }
        .btn-submit {
            width: 100%;
            background: var(--primary);
            color: #fff;
            padding: 14px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: var(--transition);
        }
        .btn-submit:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(45, 106, 79, 0.3);
        }
        .form-tip {
            font-size: 12px;
            color: var(--text-light);
            text-align: center;
            margin-top: 10px;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: #122820;
            color: rgba(255, 255, 255, 0.7);
            padding: 50px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.6fr 0.6fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .fb-logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand .fb-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            padding: 20px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        /* ===== Mobile Bottom Tab ===== */
        .mobile-bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.97);
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 16px rgba(0, 0, 0, 0.06);
            z-index: 100;
            backdrop-filter: blur(10px);
            padding-bottom: env(safe-area-inset-bottom);
        }
        .mobile-tab-list {
            display: flex;
            justify-content: space-around;
            align-items: center;
            height: 60px;
        }
        .mobile-tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            font-size: 11px;
            color: var(--text-light);
            padding: 4px 8px;
            border-radius: 10px;
            transition: var(--transition);
            min-width: 60px;
        }
        .mobile-tab-item.active {
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-tab-item svg {
            width: 22px;
            height: 22px;
        }
        .mobile-tab-item:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-tab-item:focus {
            outline: 3px solid rgba(45, 106, 79, 0.3);
            outline-offset: 1px;
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero h1 {
                font-size: 36px;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hero {
                padding: 60px 0;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero h1 {
                font-size: 30px;
            }
            .section {
                padding: 50px 0;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .topic-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 36px;
            }
            .testi-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .mobile-bottom-tab {
                display: block;
            }
            body {
                padding-bottom: 60px;
            }
            .section-head {
                margin-bottom: 30px;
            }
            .brand-logo .logo-text {
                font-size: 17px;
            }
            .brand-logo .logo-icon {
                width: 34px;
                height: 34px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .team-progress {
                padding: 16px 18px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .cta-form {
                padding: 20px;
            }
            .cta-left h2 {
                font-size: 24px;
            }
            .news-item {
                flex-direction: column;
                gap: 8px;
            }
            .news-tag {
                align-self: flex-start;
            }
            .join-info {
                flex-direction: column;
                gap: 4px;
            }
            .stat-number {
                font-size: 30px;
            }
        }