/* roulang page: index */
:root {
            --primary: #FF4D00;
            --primary-hover: #E04400;
            --primary-glow: rgba(255, 77, 0, 0.6);
            --primary-soft: rgba(255, 77, 0, 0.1);
            --bg-deep: #0F0F0F;
            --bg-card: #1E1E1E;
            --bg-input: #2A2A2A;
            --bg-footer: #0A0A0A;
            --border-subtle: #2A2A2A;
            --border-silver: #3A3A3A;
            --text-white: #FFFFFF;
            --text-body: #A0A0A0;
            --text-muted: #777777;
            --text-light-gray: #F5F5F5;
            --radius-card: 12px;
            --radius-btn: 6px;
            --radius-input: 4px;
            --radius-lg: 16px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 8px 30px rgba(255, 77, 0, 0.25);
            --shadow-hero: 0 0 60px rgba(255, 77, 0, 0.15);
            --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --container-max: 1200px;
            --font-stack: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-deep);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 1rem;
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-smooth);
        }
        button,
        input,
        textarea {
            font-family: var(--font-stack);
            font-size: 1rem;
            outline: none;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section-padding {
            padding: 100px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 60px 0;
            }
            html {
                scroll-padding-top: 64px;
            }
        }

        /* ============ 导航 ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: transparent;
            transition: var(--transition-smooth);
            padding: 0;
        }
        .site-header.scrolled {
            background: rgba(15, 15, 15, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 16px 20px;
            height: 72px;
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
                padding: 12px 16px;
            }
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.35rem;
            color: var(--text-white);
            letter-spacing: 0.02em;
            flex-shrink: 0;
            z-index: 1002;
        }
        .logo-link:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
        }
        .logo-icon svg {
            width: 100%;
            height: 100%;
            display: block;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            color: var(--text-white);
            font-size: 0.875rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition-smooth);
            border-radius: 1px;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
        }
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-cta-btn {
            display: inline-block;
            padding: 10px 22px;
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-btn);
            color: var(--primary) !important;
            font-weight: 600;
            font-size: 0.875rem;
            letter-spacing: 0.03em;
            white-space: nowrap;
            transition: var(--transition-smooth);
            background: transparent;
        }
        .nav-cta-btn:hover {
            background: var(--primary);
            color: var(--text-white) !important;
            box-shadow: 0 0 16px var(--primary-glow);
        }
        .nav-cta-btn::after {
            display: none !important;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1002;
            padding: 8px;
            background: none;
            border: none;
            width: 40px;
            height: 32px;
            justify-content: center;
            align-items: center;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 2px;
            transition: var(--transition-smooth);
            transform-origin: center;
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }
        @media (max-width: 1024px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 100%;
                max-width: 400px;
                height: 100vh;
                background: rgba(15, 15, 15, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 32px;
                transition: right 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
                z-index: 1001;
                padding: 40px;
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                font-size: 1.25rem;
                font-weight: 600;
            }
            .nav-cta-btn {
                font-size: 1.1rem;
                padding: 14px 32px;
            }
        }

        /* ============ HERO ============ */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding-top: 72px;
            background: var(--bg-deep);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding-top: 60px;
                min-height: auto;
                padding-bottom: 60px;
            }
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 60px;
            align-items: center;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 40px 20px;
        }
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }
        @media (max-width: 768px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
                text-align: center;
                padding: 20px 16px;
            }
        }
        .hero-left {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border: 1px solid var(--border-silver);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-body);
            letter-spacing: 0.05em;
            margin-bottom: 20px;
            background: rgba(255, 255, 255, 0.03);
        }
        .hero-title {
            font-size: 3rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: 0.01em;
            max-width: 600px;
        }
        .hero-title .highlight {
            color: var(--primary);
            font-size: 1.15em;
            display: inline;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.1rem;
                max-width: 100%;
            }
            .hero-title .highlight {
                font-size: 1.1em;
            }
        }
        @media (max-width: 480px) {
            .hero-title {
                font-size: 1.75rem;
            }
        }
        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-body);
            margin-bottom: 32px;
            max-width: 480px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .hero-subtitle {
                max-width: 100%;
                font-size: 0.95rem;
            }
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        @media (max-width: 768px) {
            .hero-cta-group {
                justify-content: center;
            }
        }
        @media (max-width: 480px) {
            .hero-cta-group {
                flex-direction: column;
                align-items: stretch;
            }
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            background: var(--primary);
            color: var(--text-white);
            border: none;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: var(--transition-smooth);
            white-space: nowrap;
            text-align: center;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 0 20px var(--primary-glow);
            transform: scale(1.02);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            background: transparent;
            color: var(--text-white);
            border: 1.5px solid var(--text-white);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: var(--transition-smooth);
            white-space: nowrap;
            text-align: center;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255, 77, 0, 0.05);
        }
        .hero-trust-row {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-muted);
            letter-spacing: 0.04em;
        }
        @media (max-width: 768px) {
            .hero-trust-row {
                justify-content: center;
            }
        }
        .hero-trust-row span {
            opacity: 0.7;
            white-space: nowrap;
        }
        .hero-right {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-image-wrapper {
            position: relative;
            width: 100%;
            max-width: 560px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hero);
        }
        .hero-image-wrapper img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-lg);
            transition: transform 0.6s ease;
        }
        .hero-image-wrapper:hover img {
            transform: scale(1.03);
        }
        .hero-image-wrapper::after {
            content: '';
            position: absolute;
            top: -30%;
            left: -20%;
            width: 140%;
            height: 160%;
            background: linear-gradient(135deg, rgba(255, 77, 0, 0.18) 0%, transparent 55%, rgba(255, 77, 0, 0.06) 100%);
            pointer-events: none;
            z-index: 2;
        }
        @media (max-width: 768px) {
            .hero-right {
                max-width: 400px;
                margin: 0 auto;
            }
            .hero-image-wrapper {
                max-width: 100%;
            }
        }
        .hero-orb {
            position: absolute;
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
            opacity: 0.5;
            animation: floatOrb 8s ease-in-out infinite;
        }
        .hero-orb-1 {
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(255, 77, 0, 0.25) 0%, transparent 70%);
            top: 10%;
            right: 5%;
            animation-delay: 0s;
        }
        .hero-orb-2 {
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(255, 77, 0, 0.2) 0%, transparent 70%);
            bottom: 15%;
            right: 20%;
            animation-delay: -3s;
        }
        @keyframes floatOrb {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            25% {
                transform: translate(30px, -20px) scale(1.08);
            }
            50% {
                transform: translate(-15px, 25px) scale(0.94);
            }
            75% {
                transform: translate(-25px, -10px) scale(1.04);
            }
        }
        @media (max-width: 768px) {
            .hero-orb {
                display: none;
            }
        }

        /* ============ 板块标题通用 ============ */
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }
        .section-header h2 {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-white);
            display: inline-block;
            position: relative;
            letter-spacing: 0.02em;
        }
        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 48px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-header .section-subtitle {
            margin-top: 16px;
            color: var(--text-body);
            font-size: 1rem;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 1.65rem;
            }
            .section-header {
                margin-bottom: 40px;
            }
        }

        /* ============ 亮点网格 ============ */
        .highlights-section {
            background: var(--bg-deep);
            position: relative;
            overflow: hidden;
        }
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }
        @media (max-width: 1024px) {
            .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .highlights-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .highlight-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 32px;
            border: 1px solid transparent;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .highlight-card:hover {
            border-color: rgba(255, 77, 0, 0.5);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .highlight-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .highlight-icon svg {
            width: 48px;
            height: 48px;
        }
        .highlight-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.02em;
            font-feature-settings: 'tnum';
            margin-bottom: 6px;
            line-height: 1.1;
        }
        .highlight-number .plus {
            color: var(--primary);
        }
        .highlight-label {
            font-size: 0.9rem;
            color: var(--text-body);
            font-weight: 500;
            letter-spacing: 0.03em;
        }
        .highlight-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 8px;
            line-height: 1.5;
        }

        /* ============ 案例瀑布 ============ */
        .cases-section {
            background: #121212;
        }
        .cases-masonry {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            grid-auto-rows: auto;
        }
        @media (max-width: 1024px) {
            .cases-masonry {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 768px) {
            .cases-masonry {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .case-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid transparent;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            border-color: rgba(255, 77, 0, 0.5);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .case-card:nth-child(1) {
            grid-row: span 2;
        }
        .case-card:nth-child(2) {
            grid-row: span 1;
        }
        .case-card:nth-child(3) {
            grid-row: span 2;
        }
        .case-card:nth-child(4) {
            grid-row: span 1;
        }
        .case-card:nth-child(5) {
            grid-row: span 2;
        }
        @media (max-width: 768px) {
            .case-card:nth-child(1),
            .case-card:nth-child(2),
            .case-card:nth-child(3),
            .case-card:nth-child(4),
            .case-card:nth-child(5) {
                grid-row: span 1;
            }
        }
        .case-image-wrap {
            position: relative;
            overflow: hidden;
            flex-shrink: 0;
        }
        .case-card:nth-child(1) .case-image-wrap {
            aspect-ratio: 3/4;
        }
        .case-card:nth-child(2) .case-image-wrap {
            aspect-ratio: 16/9;
        }
        .case-card:nth-child(3) .case-image-wrap {
            aspect-ratio: 1/1;
        }
        .case-card:nth-child(4) .case-image-wrap {
            aspect-ratio: 16/10;
        }
        .case-card:nth-child(5) .case-image-wrap {
            aspect-ratio: 3/4;
        }
        .case-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-card:hover .case-image-wrap img {
            transform: scale(1.06);
        }
        .case-image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 15, 15, 0.9) 0%, rgba(255, 77, 0, 0.3) 100%);
            opacity: 0;
            transition: var(--transition-smooth);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
        }
        .case-card:hover .case-image-overlay {
            opacity: 1;
        }
        .case-image-overlay .view-detail {
            padding: 10px 24px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.04em;
            border: none;
            cursor: pointer;
        }
        .case-info {
            padding: 18px 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .case-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .case-tag {
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: 14px;
            background: rgba(255, 77, 0, 0.12);
            color: var(--primary);
            font-weight: 500;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .case-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .case-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ============ 方案对比 ============ */
        .plans-section {
            background: var(--bg-deep);
        }
        .plans-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1.4fr 1fr;
            gap: 20px;
            align-items: stretch;
        }
        @media (max-width: 1024px) {
            .plans-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
        }
        @media (max-width: 768px) {
            .plans-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                max-width: 420px;
                margin: 0 auto;
            }
        }
        .plan-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            border: 1px solid transparent;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 16px;
            position: relative;
        }
        .plan-card:hover {
            border-color: rgba(255, 77, 0, 0.4);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .plan-card.featured {
            border-color: var(--primary);
            box-shadow: var(--shadow-card-hover), 0 0 30px rgba(255, 77, 0, 0.2);
            transform: scale(1.03);
            z-index: 2;
            background: #1a1a1a;
        }
        .plan-card.featured:hover {
            transform: scale(1.03) translateY(-4px);
            border-color: var(--primary);
            box-shadow: 0 12px 36px rgba(255, 77, 0, 0.3);
        }
        @media (max-width: 768px) {
            .plan-card.featured {
                transform: scale(1);
            }
            .plan-card.featured:hover {
                transform: scale(1) translateY(-4px);
            }
        }
        .plan-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--primary);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 12px;
            letter-spacing: 0.05em;
            z-index: 3;
        }
        .plan-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.03em;
        }
        .plan-price {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
        }
        .plan-price small {
            font-size: 0.75rem;
            font-weight: 400;
            color: var(--text-muted);
        }
        .plan-features {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex-grow: 1;
        }
        .plan-features li {
            font-size: 0.88rem;
            color: var(--text-body);
            padding-left: 22px;
            position: relative;
            line-height: 1.5;
        }
        .plan-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--primary);
            font-weight: 700;
            font-size: 0.85rem;
        }
        .plan-card .btn-primary,
        .plan-card .btn-outline {
            width: 100%;
            text-align: center;
            font-size: 0.88rem;
            padding: 12px 20px;
        }

        /* ============ FAQ ============ */
        .faq-section {
            background: #121212;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-subtle);
        }
        .faq-question {
            width: 100%;
            padding: 20px 0;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            text-align: left;
            letter-spacing: 0.02em;
            line-height: 1.4;
            transition: var(--transition-smooth);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-arrow {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            transition: transform 0.35s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
        }
        .faq-arrow svg {
            width: 18px;
            height: 18px;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-item.open .faq-question {
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0;
            color: var(--text-body);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 0 20px 0;
        }

        /* ============ 联系 ============ */
        .contact-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            background-attachment: fixed;
            overflow: hidden;
        }
        .contact-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(15, 15, 15, 0.75) 0%, rgba(10, 10, 10, 0.92) 100%);
            z-index: 1;
        }
        .contact-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        @media (max-width: 768px) {
            .contact-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .contact-section {
                background-attachment: scroll;
            }
        }
        .contact-cta-text h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.02em;
            margin-bottom: 12px;
        }
        .contact-cta-text p {
            color: var(--text-body);
            font-size: 1rem;
            line-height: 1.6;
            margin-bottom: 20px;
            max-width: 400px;
        }
        .contact-info-row {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }
        .contact-info-row span {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .contact-info-row .info-icon {
            width: 18px;
            height: 18px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .contact-form {
            background: rgba(30, 30, 30, 0.85);
            border-radius: var(--radius-card);
            padding: 36px 28px;
            border: 1px solid var(--border-silver);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .contact-form .form-group {
            margin-bottom: 16px;
        }
        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 14px 16px;
            background: var(--bg-input);
            border: 1.5px solid transparent;
            border-radius: var(--radius-input);
            color: var(--text-white);
            font-size: 0.9rem;
            letter-spacing: 0.02em;
            transition: var(--transition-smooth);
            resize: vertical;
        }
        .contact-form input::placeholder,
        .contact-form textarea::placeholder {
            color: #777;
        }
        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 77, 0, 0.25);
            outline: none;
        }
        .contact-form textarea {
            min-height: 100px;
        }
        .contact-form .btn-primary {
            width: 100%;
            font-size: 0.95rem;
            padding: 14px;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-footer);
            padding: 50px 0 30px;
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                text-align: center;
            }
        }
        .footer-brand .footer-logo {
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--text-white);
            letter-spacing: 0.03em;
            margin-bottom: 8px;
        }
        .footer-brand p {
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 300px;
        }
        @media (max-width: 768px) {
            .footer-brand p {
                max-width: 100%;
            }
        }
        .footer-links h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }
        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: var(--transition-smooth);
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-social-icons {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        @media (max-width: 768px) {
            .footer-social-icons {
                justify-content: center;
            }
        }
        .footer-social-icons a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #1a1a1a;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: var(--transition-smooth);
            border: 1px solid #2a2a2a;
        }
        .footer-social-icons a:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(255, 77, 0, 0.08);
        }
        .footer-social-icons svg {
            width: 18px;
            height: 18px;
        }
        .footer-bottom {
            border-top: 1px solid #1e1e1e;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: #555;
            letter-spacing: 0.03em;
        }

        /* ============ 表单反馈 ============ */
        .form-success-msg {
            display: none;
            padding: 14px 18px;
            background: rgba(255, 77, 0, 0.12);
            border: 1px solid var(--primary);
            border-radius: var(--radius-input);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.9rem;
            letter-spacing: 0.02em;
            margin-top: 12px;
            text-align: center;
        }
        .form-success-msg.visible {
            display: block;
            animation: fadeInUp 0.4s ease;
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }