/* roulang page: index */
:root {
            --gradient-start: #FF5E3A;
            --gradient-end: #FFBB2E;
            --gradient-main: linear-gradient(135deg, #FF5E3A 0%, #FFBB2E 100%);
            --deep-black: #10111A;
            --warm-gray: #F5F6FA;
            --sport-green: #00D26A;
            --text-body: #2D2F3C;
            --text-muted: #6C6F7D;
            --text-inverse: #FFFFFF;
            --card-radius: 16px;
            --btn-radius: 50px;
            --btn-radius-rect: 12px;
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 16px 36px rgba(0, 0, 0, 0.10);
            --shadow-nav: 0 2px 20px rgba(0, 0, 0, 0.06);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background-color: #FFFFFF;
            overflow-x: hidden;
            min-width: 320px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            border: none;
            font-family: inherit;
            font-size: inherit;
            transition: all var(--transition-smooth);
        }
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: 1px solid #DDE0E8;
            border-radius: 12px;
            padding: 14px 18px;
            width: 100%;
            background: #FFFFFF;
            color: var(--text-body);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        input:focus,
        textarea:focus {
            border-color: var(--sport-green);
            box-shadow: 0 0 0 3px rgba(0, 210, 106, 0.10);
        }
        textarea {
            resize: vertical;
            min-height: 120px;
        }

        /* ========== 导航栏 ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: box-shadow var(--transition-smooth);
            height: 68px;
            display: flex;
            align-items: center;
        }
        .site-nav.scrolled {
            box-shadow: var(--shadow-nav);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--sport-green);
            transition: transform var(--transition-smooth);
        }
        .nav-links a:hover {
            color: #FF5E3A;
            background: rgba(255, 94, 58, 0.04);
        }
        .nav-links a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-links a.active-link {
            color: #FF5E3A;
            font-weight: 600;
        }
        .nav-links a.active-link::after {
            transform: translateX(-50%) scaleX(1);
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            cursor: pointer;
            gap: 6px;
            z-index: 1001;
            position: relative;
            padding: 0;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            border-radius: 3px;
            background: var(--text-body);
            transition: all var(--transition-smooth);
            transform-origin: center;
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(8.5px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-8.5px) rotate(-45deg);
        }

        /* 移动端菜单 */
        .mobile-menu {
            position: fixed;
            inset: 0;
            z-index: 999;
            background: rgba(0, 210, 106, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 20px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }
        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu a {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: 50px;
            transition: background var(--transition-fast);
            letter-spacing: 1px;
        }
        .mobile-menu a:hover {
            background: rgba(255, 255, 255, 0.18);
        }

        /* ========== 板块通用 ========== */
        .section-padding {
            padding: 90px 32px;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
        }
        .section-h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--deep-black);
            text-align: center;
            margin-bottom: 16px;
            position: relative;
        }
        .section-h2::after {
            content: '';
            display: block;
            width: 40px;
            height: 4px;
            border-radius: 2px;
            background: var(--sport-green);
            margin: 10px auto 0;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto 50px;
            line-height: 1.6;
        }

        /* ========== Hero ========== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: 68px;
            background: #FAFBFC;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -180px;
            right: -120px;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 187, 46, 0.13) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 94, 58, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-inner {
            display: flex;
            align-items: center;
            gap: 60px;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 40px 32px;
            position: relative;
            z-index: 1;
        }
        .hero-left {
            flex: 0 0 55%;
            max-width: 55%;
        }
        .hero-right {
            flex: 0 0 45%;
            max-width: 45%;
            position: relative;
        }
        .hero-h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--deep-black);
            margin-bottom: 20px;
            letter-spacing: -0.3px;
        }
        .hero-subtitle {
            font-size: 18px;
            line-height: 1.6;
            color: var(--text-muted);
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 15px 32px;
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            background: var(--gradient-main);
            border-radius: var(--btn-radius);
            box-shadow: 0 6px 20px rgba(255, 94, 58, 0.28);
            transition: all var(--transition-smooth);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            box-shadow: 0 10px 30px rgba(255, 94, 58, 0.40);
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 15px 32px;
            font-size: 18px;
            font-weight: 700;
            color: #FF5E3A;
            background: #FFFFFF;
            border: 2px solid #FF5E3A;
            border-radius: var(--btn-radius);
            transition: all var(--transition-smooth);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: #FFF5F2;
            border-color: #FF3B1A;
            color: #FF3B1A;
            transform: translateY(-2px);
        }
        .hero-image-wrap {
            position: relative;
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.10);
            aspect-ratio: 4 / 3;
        }
        .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .hero-badge {
            position: absolute;
            top: -10px;
            right: -10px;
            background: var(--sport-green);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 14px;
            padding: 6px 16px;
            border-radius: 20px;
            white-space: nowrap;
            z-index: 2;
            box-shadow: 0 4px 16px rgba(0, 210, 106, 0.30);
            letter-spacing: 0.3px;
        }

        /* ========== 亮点网格 ========== */
        .features-section {
            background: #FFFFFF;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--warm-gray);
            border-radius: var(--card-radius);
            padding: 36px 24px 30px;
            text-align: center;
            position: relative;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: #FF5E3A;
        }
        .feature-icon-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--sport-green);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            flex-shrink: 0;
        }
        .feature-icon-circle svg {
            width: 28px;
            height: 28px;
            color: #FFFFFF;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--deep-black);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .feature-badge {
            position: absolute;
            top: 14px;
            right: 14px;
            background: var(--sport-green);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 4px;
            white-space: nowrap;
            letter-spacing: 0.2px;
        }

        /* ========== 案例瀑布 ========== */
        .cases-section {
            background: #FAFBFC;
        }
        .cases-masonry {
            column-count: 3;
            column-gap: 24px;
        }
        .case-card {
            break-inside: avoid;
            background: #FFFFFF;
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            margin-bottom: 24px;
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
            position: relative;
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: #FF5E3A;
        }
        .case-img-wrap {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            position: relative;
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform var(--transition-smooth);
        }
        .case-card:hover .case-img-wrap img {
            transform: scale(1.04);
        }
        .case-body {
            padding: 18px 20px 20px;
        }
        .case-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--deep-black);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .case-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .case-tag {
            display: inline-block;
            background: rgba(0, 210, 106, 0.12);
            color: #00994E;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.2px;
        }
        .case-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--sport-green);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 4px;
            white-space: nowrap;
            z-index: 2;
            box-shadow: 0 3px 10px rgba(0, 210, 106, 0.25);
        }
        .case-card:nth-child(odd) .case-body p {
            /* 奇数卡片描述稍长，创造高度差异 */
        }
        .case-card:nth-child(2) .case-body p {
            min-height: 60px;
        }
        .case-card:nth-child(4) .case-body p {
            min-height: 50px;
        }

        /* ========== 方案对比 ========== */
        .plans-section {
            background: #FFFFFF;
        }
        .plans-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .plan-card {
            background: #FFFFFF;
            border-radius: var(--card-radius);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-card);
            border: 2px solid #E8EAF0;
            text-align: center;
            position: relative;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .plan-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .plan-card.featured {
            border: 2px solid transparent;
            background-origin: border-box;
            background-clip: padding-box, border-box;
            background-image: linear-gradient(#FFFFFF, #FFFFFF), var(--gradient-main);
            position: relative;
            z-index: 1;
            box-shadow: 0 12px 36px rgba(255, 94, 58, 0.14);
        }
        .plan-card.featured::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--card-radius);
            background: linear-gradient(180deg, rgba(255, 187, 46, 0.04) 0%, transparent 60%);
            pointer-events: none;
            z-index: -1;
        }
        .plan-badge-recommend {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--sport-green);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 13px;
            padding: 6px 20px;
            border-radius: 20px;
            white-space: nowrap;
            letter-spacing: 0.4px;
            box-shadow: 0 4px 14px rgba(0, 210, 106, 0.30);
            z-index: 3;
        }
        .plan-name {
            font-size: 22px;
            font-weight: 700;
            color: var(--deep-black);
            margin-bottom: 6px;
        }
        .plan-price {
            font-size: 36px;
            font-weight: 800;
            color: #FF5E3A;
            margin-bottom: 4px;
            letter-spacing: -1px;
        }
        .plan-price span {
            font-size: 16px;
            font-weight: 400;
            color: var(--text-muted);
        }
        .plan-price-free {
            font-size: 36px;
            font-weight: 800;
            color: var(--sport-green);
            letter-spacing: -1px;
        }
        .plan-features {
            list-style: none;
            text-align: left;
            margin: 24px 0 28px;
            flex-grow: 1;
        }
        .plan-features li {
            padding: 8px 0;
            font-size: 15px;
            color: var(--text-body);
            position: relative;
            padding-left: 28px;
            line-height: 1.5;
        }
        .plan-features li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 13px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: rgba(0, 210, 106, 0.15);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2300D26A' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
            background-size: 10px;
            background-position: center;
            background-repeat: no-repeat;
        }
        .plan-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            padding: 14px 24px;
            font-size: 16px;
            font-weight: 700;
            border-radius: var(--btn-radius);
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
        }
        .plan-btn-outline {
            color: #FF5E3A;
            background: #FFFFFF;
            border: 2px solid #FF5E3A;
        }
        .plan-btn-outline:hover {
            background: #FFF5F2;
            border-color: #FF3B1A;
        }
        .plan-btn-solid {
            color: #FFFFFF;
            background: var(--gradient-main);
            box-shadow: 0 6px 20px rgba(255, 94, 58, 0.25);
        }
        .plan-btn-solid:hover {
            box-shadow: 0 10px 28px rgba(255, 94, 58, 0.38);
            transform: translateY(-2px);
        }
        .plan-btn-dark {
            color: #FFFFFF;
            background: var(--deep-black);
            border: 2px solid var(--deep-black);
        }
        .plan-btn-dark:hover {
            background: #2A2C3A;
            border-color: #2A2C3A;
            transform: translateY(-2px);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: #FAFBFC;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid #E2E5EC;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 8px;
            font-size: 18px;
            font-weight: 600;
            color: var(--deep-black);
            background: transparent;
            border: none;
            cursor: pointer;
            text-align: left;
            line-height: 1.5;
            transition: color var(--transition-fast);
            gap: 16px;
        }
        .faq-question:hover {
            color: #FF5E3A;
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(0, 210, 106, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--sport-green);
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }
        .faq-icon::before {
            width: 14px;
            height: 2px;
        }
        .faq-icon::after {
            width: 2px;
            height: 14px;
        }
        .faq-item.open .faq-icon {
            background: var(--sport-green);
        }
        .faq-item.open .faq-icon::before {
            background: #FFFFFF;
        }
        .faq-item.open .faq-icon::after {
            transform: rotate(90deg);
            background: #FFFFFF;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease;
            padding: 0 8px;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-muted);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 8px 20px;
        }

        /* ========== CTA + 页脚 ========== */
        .cta-section {
            background: var(--gradient-main);
            padding: 80px 32px;
            text-align: center;
            color: #FFFFFF;
        }
        .cta-section .section-h2 {
            color: #FFFFFF;
        }
        .cta-section .section-h2::after {
            background: #FFFFFF;
        }
        .cta-subtitle {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            line-height: 1.6;
        }
        .cta-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            max-width: 640px;
            margin: 0 auto;
            justify-content: center;
        }
        .cta-form input {
            flex: 1 1 200px;
            min-width: 180px;
            border: 2px solid transparent;
            background: #FFFFFF;
            color: var(--text-body);
            border-radius: var(--btn-radius);
            padding: 15px 20px;
            font-size: 15px;
        }
        .cta-form input:focus {
            border-color: var(--sport-green);
            box-shadow: 0 0 0 4px rgba(0, 210, 106, 0.12);
        }
        .cta-form textarea {
            flex: 1 1 100%;
            min-width: 100%;
            border: 2px solid transparent;
            background: #FFFFFF;
            color: var(--text-body);
            border-radius: var(--btn-radius);
            padding: 15px 20px;
            font-size: 15px;
            min-height: 100px;
        }
        .cta-form textarea:focus {
            border-color: var(--sport-green);
            box-shadow: 0 0 0 4px rgba(0, 210, 106, 0.12);
        }
        .btn-submit {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 15px 40px;
            font-size: 17px;
            font-weight: 700;
            color: #FFFFFF;
            background: var(--deep-black);
            border-radius: var(--btn-radius);
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            letter-spacing: 0.4px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .btn-submit:hover {
            background: #2A2C3A;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.20);
        }

        /* 页脚 */
        .site-footer {
            background: var(--deep-black);
            color: #C5C7D0;
            padding: 60px 32px 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr 1fr;
            gap: 40px;
            max-width: 1280px;
            margin: 0 auto;
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: #8B8D96;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #8B8D96;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #FFBB2E;
        }
        .social-icons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            color: #C5C7D0;
        }
        .social-icon:hover {
            background: var(--sport-green);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .social-icon svg {
            width: 18px;
            height: 18px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 40px;
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: #6B6D76;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1280px) {
            .hero-inner {
                gap: 40px;
            }
            .hero-h1 {
                font-size: 36px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .cases-masonry {
                column-count: 3;
                column-gap: 18px;
            }
            .plans-grid {
                gap: 18px;
            }
            .plan-card {
                padding: 28px 18px 24px;
            }
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 28px;
            }
            .footer-grid .footer-col:last-child {
                grid-column: span 1;
            }
        }

        @media (max-width: 1024px) {
            .section-padding {
                padding: 64px 24px;
            }
            .section-h2 {
                font-size: 28px;
            }
            .hero-inner {
                flex-direction: column;
                gap: 32px;
                text-align: center;
            }
            .hero-left {
                flex: 0 0 100%;
                max-width: 100%;
                order: 1;
            }
            .hero-right {
                flex: 0 0 100%;
                max-width: 480px;
                order: 2;
                margin: 0 auto;
            }
            .hero-h1 {
                font-size: 32px;
            }
            .hero-subtitle {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
            .hero-btns {
                justify-content: center;
            }
            .hero-badge {
                top: -8px;
                right: -8px;
                font-size: 13px;
                padding: 5px 14px;
            }
            .cases-masonry {
                column-count: 2;
                column-gap: 16px;
            }
            .case-card {
                margin-bottom: 16px;
            }
            .plans-grid {
                grid-template-columns: 1fr;
                max-width: 440px;
                margin: 0 auto;
                gap: 20px;
            }
            .plan-card.featured {
                order: -1;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-grid .footer-col:first-child {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .section-padding {
                padding: 50px 16px;
            }
            .section-h2 {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .hero-section {
                min-height: auto;
                padding-top: 80px;
                padding-bottom: 50px;
            }
            .hero-inner {
                padding: 20px 16px;
                gap: 24px;
            }
            .hero-h1 {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                font-size: 16px;
                padding: 14px 24px;
            }
            .hero-right {
                max-width: 100%;
            }
            .hero-badge {
                font-size: 12px;
                padding: 4px 12px;
                top: -6px;
                right: -6px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 28px 20px 24px;
            }
            .cases-masonry {
                column-count: 1;
                column-gap: 0;
            }
            .case-card {
                margin-bottom: 16px;
            }
            .plans-grid {
                max-width: 100%;
                gap: 16px;
            }
            .plan-card {
                padding: 24px 18px 20px;
            }
            .plan-price,
            .plan-price-free {
                font-size: 28px;
            }
            .faq-question {
                font-size: 16px;
                padding: 14px 4px;
            }
            .faq-answer {
                font-size: 15px;
            }
            .cta-section {
                padding: 50px 16px;
            }
            .cta-form {
                flex-direction: column;
                gap: 10px;
            }
            .cta-form input {
                flex: 1 1 auto;
                min-width: 100%;
            }
            .btn-submit {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid .footer-col:first-child {
                grid-column: span 1;
            }
            .footer-desc {
                max-width: 100%;
            }
            .social-icons {
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .nav-inner {
                padding: 0 16px;
            }
            .nav-logo {
                font-size: 19px;
            }
            .hero-h1 {
                font-size: 24px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .section-h2 {
                font-size: 22px;
            }
            .section-h2::after {
                width: 32px;
                height: 3px;
                margin-top: 8px;
            }
            .feature-card h3 {
                font-size: 18px;
            }
            .case-body h3 {
                font-size: 16px;
            }
            .plan-name {
                font-size: 19px;
            }
            .btn-submit {
                font-size: 15px;
                padding: 13px 28px;
            }
            .footer-bottom {
                font-size: 12px;
            }
        }