/* ===== 全局重置 ===== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: #0b0b0b;
            color: #fff;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        ul {
            list-style: none;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #1a1a1a;
        }
        ::-webkit-scrollbar-thumb {
            background: #c41e24;
            border-radius: 6px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #e63038;
        }

        /* ===== 语言切换 ===== */
        .lang-toggle {
            display: flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 40px;
            padding: 6px 6px 6px 16px;
            cursor: pointer;
            transition: all 0.3s ease;
            user-select: none;
            backdrop-filter: blur(4px);
        }
        .lang-toggle:hover {
            background: rgba(196, 30, 36, 0.25);
            border-color: rgba(196, 30, 36, 0.5);
        }
        .lang-toggle .lang-label {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.3s;
        }
        .lang-toggle .lang-switch {
            display: flex;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 40px;
            padding: 3px;
            gap: 2px;
        }
        .lang-toggle .lang-option {
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.4);
            transition: all 0.3s ease;
            letter-spacing: 0.5px;
        }
        .lang-toggle .lang-option.active {
            background: #c41e24;
            color: #fff;
            box-shadow: 0 0 20px rgba(196, 30, 36, 0.4);
        }
        .lang-toggle .lang-option:not(.active):hover {
            color: #fff;
        }

        /* ===== 导航栏 ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            padding: 18px 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            z-index: 999;
            background: linear-gradient(180deg, rgba(11, 11, 11, 0.92) 60%, transparent);
            transition: all 0.4s ease;
            flex-wrap: wrap;
            gap: 12px;
        }
        .navbar.scrolled {
            background: rgba(11, 11, 11, 0.96);
            padding: 14px 60px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-logo .logo-icon {
            font-size: 28px;
            color: #ff6b35;
            filter: drop-shadow(0 0 12px rgba(255, 107, 53, 0.4));
            animation: logoGlow 2.4s ease-in-out infinite alternate;
        }
        @keyframes logoGlow {
            0% {
                filter: drop-shadow(0 0 8px rgba(255, 107, 53, 0.3));
            }
            100% {
                filter: drop-shadow(0 0 24px rgba(255, 107, 53, 0.7));
            }
        }
        .nav-logo .logo-text {
            font-size: 22px;
            font-weight: 900;
            letter-spacing: 1px;
            background: linear-gradient(135deg, #ff6b35, #c41e24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-logo .logo-text-en {
            font-size: 13px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 1.5px;
            margin-left: 4px;
            -webkit-text-fill-color: rgba(255, 255, 255, 0.5);
        }

        /* 导航菜单 */
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .nav-menu a {
            font-size: 14px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.3s, transform 0.2s;
            letter-spacing: 0.3px;
            position: relative;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -4px;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #ff6b35, #c41e24);
            transition: width 0.3s ease;
        }
        .nav-menu a:hover {
            color: #fff;
            transform: translateY(-1px);
        }
        .nav-menu a:hover::after {
            width: 100%;
        }

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

        /* ===== 汉堡按钮 ===== */
        .hamburger {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 28px;
            cursor: pointer;
            padding: 4px 8px;
            transition: color 0.3s;
            order: 2;
        }
        .hamburger:hover {
            color: #ff6b35;
        }

        @media (max-width: 768px) {
            .nav-actions {
                gap: 12px;
            }
            .hamburger {
                display: block;
                order: 2;
            }
            .lang-toggle {
                order: 1;
            }
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: flex-start; /* 改为左对齐，与下方板块对齐 */
            position: relative;
            background: radial-gradient(ellipse at 30% 50%, #2a0a0a 0%, #0b0b0b 70%);
            overflow: hidden;
            padding: 120px 60px 80px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 70%;
            height: 140%;
            background: radial-gradient(ellipse, rgba(196, 30, 36, 0.15), transparent 70%);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 60%;
            height: 120%;
            background: radial-gradient(ellipse, rgba(255, 107, 53, 0.08), transparent 70%);
            pointer-events: none;
        }
        .fire-particles {
            position: absolute;
            inset: 0;
            pointer-events: none;
            overflow: hidden;
        }
        .particle {
            position: absolute;
            border-radius: 50%;
            background: radial-gradient(circle, #ff6b35, #c41e24);
            opacity: 0;
            animation: particleFloat 6s ease-in-out infinite;
        }
        .particle:nth-child(1) {
            width: 14px;
            height: 14px;
            left: 10%;
            bottom: 10%;
            animation-delay: 0s;
        }
        .particle:nth-child(2) {
            width: 22px;
            height: 22px;
            left: 25%;
            bottom: 30%;
            animation-delay: 1.2s;
        }
        .particle:nth-child(3) {
            width: 10px;
            height: 10px;
            left: 5%;
            bottom: 50%;
            animation-delay: 2.4s;
        }
        .particle:nth-child(4) {
            width: 30px;
            height: 30px;
            right: 15%;
            bottom: 5%;
            animation-delay: 0.6s;
        }
        .particle:nth-child(5) {
            width: 18px;
            height: 18px;
            right: 30%;
            bottom: 40%;
            animation-delay: 1.8s;
        }
        .particle:nth-child(6) {
            width: 8px;
            height: 8px;
            right: 8%;
            bottom: 65%;
            animation-delay: 3.0s;
        }
        .particle:nth-child(7) {
            width: 26px;
            height: 26px;
            left: 45%;
            bottom: 0%;
            animation-delay: 0.9s;
        }
        .particle:nth-child(8) {
            width: 12px;
            height: 12px;
            left: 60%;
            bottom: 20%;
            animation-delay: 2.1s;
        }
        @keyframes particleFloat {
            0% {
                transform: translateY(0) scale(0.6) rotate(0deg);
                opacity: 0;
            }
            20% {
                opacity: 0.7;
            }
            80% {
                opacity: 0.7;
            }
            100% {
                transform: translateY(-180px) scale(1.4) rotate(360deg);
                opacity: 0;
            }
        }

        .fire-center {
            position: absolute;
            right: 8%;
            top: 50%;
            transform: translateY(-50%);
            width: 380px;
            height: 480px;
            pointer-events: none;
            opacity: 0.7;
        }
        @media (max-width: 1024px) {
            .fire-center {
                width: 260px;
                height: 340px;
                right: 4%;
            }
        }
        @media (max-width: 768px) {
            .fire-center {
                display: none;
            }
        }
        .flame {
            position: absolute;
            border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
            transform-origin: bottom center;
            animation: flameBurn 1.8s ease-in-out infinite alternate;
        }
        .flame-1 {
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 50% 80%, #ff4d2a 0%, #c41e24 50%, #8a1217 90%);
            bottom: 0;
            left: 0;
            border-radius: 50% 50% 50% 50% / 70% 70% 30% 30%;
            animation-duration: 1.6s;
            box-shadow: 0 0 80px rgba(196, 30, 36, 0.5);
        }
        .flame-2 {
            width: 72%;
            height: 80%;
            background: radial-gradient(ellipse at 50% 70%, #ff6b35 0%, #d42a30 60%, #a0151a 100%);
            bottom: 8%;
            left: 14%;
            border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
            animation-duration: 2.0s;
            animation-delay: 0.2s;
        }
        .flame-3 {
            width: 46%;
            height: 56%;
            background: radial-gradient(ellipse at 50% 60%, #ffb07c 0%, #ff6b35 50%, #c41e24 100%);
            bottom: 18%;
            left: 27%;
            border-radius: 50% 50% 50% 50% / 50% 50% 50% 50%;
            animation-duration: 1.4s;
            animation-delay: 0.5s;
        }
        .flame-4 {
            width: 28%;
            height: 32%;
            background: radial-gradient(ellipse at 50% 50%, #ffd700 0%, #ff8a5c 60%, #d42a30 100%);
            bottom: 30%;
            left: 36%;
            border-radius: 50% 50% 50% 50% / 50% 50% 50% 50%;
            animation-duration: 1.2s;
            animation-delay: 0.8s;
        }
        @keyframes flameBurn {
            0% {
                transform: scale(1) rotate(-2deg) skewX(0deg);
                opacity: 0.85;
            }
            50% {
                transform: scale(1.06) rotate(1deg) skewX(1deg);
                opacity: 1;
            }
            100% {
                transform: scale(0.96) rotate(-1deg) skewX(-1deg);
                opacity: 0.8;
            }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
			margin-left: 10%;
            /* 不再居中，默认左对齐 */
        }
        .hero-badge {
            display: inline-block;
            background: rgba(196, 30, 36, 0.2);
            border: 1px solid rgba(196, 30, 36, 0.3);
            border-radius: 60px;
            padding: 6px 22px;
            font-size: 13px;
            font-weight: 600;
            color: #ff8a5c;
            letter-spacing: 1px;
            backdrop-filter: blur(4px);
            margin-bottom: 28px;
        }
        .hero-badge i {
            margin-right: 8px;
            color: #ff6b35;
        }
        .hero-title {
            font-size: clamp(44px, 7vw, 82px);
            font-weight: 900;
            line-height: 1.08;
            margin-bottom: 12px;
            letter-spacing: -1px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, #ff6b35, #c41e24, #ff4d2a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            filter: drop-shadow(0 0 30px rgba(196, 30, 36, 0.2));
        }
        .hero-title-en {
            font-size: clamp(18px, 2.2vw, 32px);
            font-weight: 700;
            color: rgba(255, 255, 255, 0.4);
            letter-spacing: 3px;
            margin-bottom: 24px;
            border-left: 3px solid #c41e24;
            padding-left: 20px;
        }
        .hero-desc {
            font-size: clamp(16px, 1.4vw, 20px);
            color: rgba(255, 255, 255, 0.6);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 40px;
            font-weight: 400;
        }
        .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: 14px;
            background: linear-gradient(135deg, #c41e24, #e63038);
            color: #fff;
            padding: 16px 44px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 8px 40px rgba(196, 30, 36, 0.35);
            letter-spacing: 0.5px;
        }
        .hero-cta:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 56px rgba(196, 30, 36, 0.5);
            background: linear-gradient(135deg, #d42a30, #f03a42);
        }
        .hero-cta i {
            font-size: 18px;
            transition: transform 0.3s;
        }
        .hero-cta:hover i {
            transform: translateX(6px);
        }
        .hero-stats {
            display: flex;
            gap: 50px;
            margin-top: 50px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-stats .stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stats .stat-number {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .hero-stats .stat-number span {
            color: #ff6b35;
        }
        .hero-stats .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-top: 2px;
        }

        /* ===== 通用 Section ===== */
        .section {
            padding: 100px 60px;
            position: relative;
        }
        .section-dark {
            background: #0f0f0f;
        }
        .section-light {
            background: #161616;
        }
        .section-header {
            text-align: center;
            margin-bottom: 64px;
        }
        .section-header .subtitle {
            font-size: 14px;
            font-weight: 600;
            color: #ff6b35;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header .title {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.2;
        }
        .section-header .title .highlight {
            background: linear-gradient(135deg, #ff6b35, #c41e24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header .desc {
            color: rgba(255, 255, 255, 0.5);
            max-width: 540px;
            margin: 16px auto 0;
            font-size: 16px;
            line-height: 1.7;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
        }

        /* ===== 业务卡片 ===== */
        .business-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        @media (max-width: 1024px) {
            .business-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .section {
                padding: 70px 40px;
            }
            .navbar {
                padding: 14px 30px;
            }
            .navbar.scrolled {
                padding: 12px 30px;
            }
        }
        @media (max-width: 768px) {
			.hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
			margin-left: 3%;
            /* 不再居中，默认左对齐 */
        }
			
            .business-grid,
            .solutions-grid {
                grid-template-columns: 1fr !important;
            }
            .section {
                padding: 50px 20px;
            }
            .navbar {
                padding: 12px 16px;
                flex-wrap: wrap;
            }
            .navbar.scrolled {
                padding: 10px 16px;
            }
            .nav-menu {
                display: none !important;
                flex-direction: column;
                width: 100%;
                background: rgba(11, 11, 11, 0.98);
                padding: 20px 0;
                gap: 20px;
                align-items: center;
                border-top: 1px solid rgba(255, 255, 255, 0.05);
                margin-top: 12px;
                order: 3;
            }
            .nav-menu.open {
                display: flex !important;
            }
            .nav-menu a {
                font-size: 16px;
                padding: 6px 0;
            }
            .nav-actions {
                gap: 12px;
            }
            .lang-toggle .lang-label {
                display: none;
            }
            .lang-toggle {
                padding: 4px 4px 4px 10px;
            }
            .nav-logo .logo-text {
                font-size: 18px;
            }
            .nav-logo .logo-text-en {
                font-size: 11px;
            }
            .hero {
                padding: 100px 20px 60px;
                justify-content: flex-start; /* 移动端也左对齐 */
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero-stats .stat-number {
                font-size: 22px;
            }
            .contact-form .form-row {
                flex-direction: column;
            }
        }
        @media (max-width: 480px) {
            .hero-title {
                font-size: 34px;
            }
            .hero-title-en {
                font-size: 16px;
                padding-left: 12px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-cta {
                padding: 14px 28px;
                font-size: 14px;
            }
            .business-card {
                padding: 28px 20px 26px;
            }
            .business-card .card-title {
                font-size: 19px;
            }
            .section-header .title {
                font-size: 28px;
            }
        }

        .business-card {
            background: linear-gradient(145deg, #1a1a1a, #121212);
            border-radius: 24px;
            padding: 40px 32px 36px;
            border: 1px solid rgba(255, 255, 255, 0.04);
            transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
            position: relative;
            overflow: hidden;
            cursor: default;
        }
        .business-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, #c41e24, #ff6b35, #c41e24);
            opacity: 0;
            transition: opacity 0.4s;
        }
        .business-card:hover {
            transform: translateY(-10px);
            border-color: rgba(196, 30, 36, 0.25);
            box-shadow: 0 20px 60px rgba(196, 30, 36, 0.08);
        }
        .business-card:hover::before {
            opacity: 1;
        }
        .business-card .card-icon {
            font-size: 44px;
            color: #ff6b35;
            margin-bottom: 20px;
            display: inline-block;
            filter: drop-shadow(0 0 16px rgba(255, 107, 53, 0.15));
            transition: transform 0.3s;
        }
        .business-card:hover .card-icon {
            transform: scale(1.08) rotate(-2deg);
        }
        .business-card .card-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .business-card .card-desc {
            color: rgba(255, 255, 255, 0.5);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .business-card .card-features {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-top: 12px;
            margin-bottom: 18px;
        }
        .business-card .card-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }
        .business-card .card-features li i {
            color: #ff6b35;
            font-size: 13px;
            width: 18px;
        }
        .business-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: #ff6b35;
            letter-spacing: 0.5px;
            border: 1px solid rgba(255, 107, 53, 0.15);
            border-radius: 40px;
            padding: 4px 16px;
            transition: all 0.3s;
        }
        .business-card:hover .card-tag {
            background: rgba(196, 30, 36, 0.12);
            border-color: rgba(196, 30, 36, 0.3);
        }

        /* ===== 解决方案 ===== */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .solutions-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        .solution-card {
            background: rgba(255, 255, 255, 0.02);
            border-radius: 20px;
            padding: 32px 24px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: all 0.4s ease;
            position: relative;
            backdrop-filter: blur(4px);
        }
        .solution-card:hover {
            background: rgba(196, 30, 36, 0.06);
            border-color: rgba(196, 30, 36, 0.2);
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }
        .solution-card .sol-icon {
            font-size: 32px;
            color: #ff6b35;
            margin-bottom: 16px;
            display: inline-block;
        }
        .solution-card .sol-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .solution-card .sol-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.6;
        }
        .solution-card .sol-tag {
            display: inline-block;
            margin-top: 14px;
            font-size: 12px;
            color: #ff6b35;
            border: 1px solid rgba(255, 107, 53, 0.1);
            border-radius: 30px;
            padding: 2px 14px;
        }

        .ai-solution-detail {
            margin-top: 50px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            background: rgba(255, 255, 255, 0.02);
            border-radius: 24px;
            padding: 40px;
            border: 1px solid rgba(255, 255, 255, 0.04);
        }
        @media (max-width: 768px) {
            .ai-solution-detail {
                grid-template-columns: 1fr;
                padding: 24px;
            }
        }
        .ai-solution-detail .detail-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .ai-solution-detail .detail-item i {
            font-size: 28px;
            color: #ff6b35;
            margin-top: 4px;
            min-width: 40px;
        }
        .ai-solution-detail .detail-item .detail-content h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .ai-solution-detail .detail-item .detail-content p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.6;
        }

        /* ===== About ===== */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        @media (max-width: 768px) {
            .about-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }
        .about-text .about-title {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
        }
        .about-text .about-title .highlight {
            background: linear-gradient(135deg, #ff6b35, #c41e24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .about-text p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .about-text .about-features {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 40px;
            margin-top: 24px;
        }
        .about-text .about-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            font-weight: 500;
        }
        .about-text .about-features li i {
            color: #ff6b35;
            font-size: 18px;
        }
        .about-image .fire-ring {
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle at 30% 30%, rgba(196, 30, 36, 0.15), rgba(11, 11, 11, 0.9));
            border: 2px solid rgba(196, 30, 36, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            animation: ringPulse 4s ease-in-out infinite;
        }
        .about-image .fire-ring i {
            font-size: 100px;
            color: #ff6b35;
            filter: drop-shadow(0 0 40px rgba(255, 107, 53, 0.2));
            animation: logoGlow 2.4s ease-in-out infinite alternate;
        }
        .about-image .fire-ring .ring-orbit {
            position: absolute;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            border: 1px dashed rgba(196, 30, 36, 0.1);
            animation: spinOrbit 20s linear infinite;
        }
        .about-image .fire-ring .ring-orbit:nth-child(2) {
            width: 80%;
            height: 80%;
            animation-duration: 14s;
            animation-direction: reverse;
            border-color: rgba(255, 107, 53, 0.06);
        }
        @keyframes ringPulse {
            0%,
            100% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.03);
                opacity: 0.8;
            }
        }
        @keyframes spinOrbit {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }

        /* ===== 留言板块 ===== */
        .contact-section {
            background: #161616;
        }
        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: start;
        }
        @media (max-width: 768px) {
            .contact-wrapper {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }
        .contact-info h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .contact-info h3 .highlight {
            background: linear-gradient(135deg, #ff6b35, #c41e24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .contact-info p {
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.8;
            font-size: 16px;
            margin-bottom: 24px;
        }
        .contact-info .info-item {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 16px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
        }
        .contact-info .info-item i {
            color: #ff6b35;
            font-size: 20px;
            width: 28px;
        }

        .contact-form .form-group {
            margin-bottom: 20px;
        }
        .contact-form label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 6px;
            color: rgba(255, 255, 255, 0.7);
        }
        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 14px 18px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            color: #fff;
            font-size: 15px;
            font-family: inherit;
            transition: border-color 0.3s, background 0.3s;
            outline: none;
        }
        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: #c41e24;
            background: rgba(196, 30, 36, 0.06);
        }
        .contact-form textarea {
            resize: vertical;
            min-height: 120px;
        }
        .contact-form .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 480px) {
            .contact-form .form-row {
                grid-template-columns: 1fr;
            }
        }
        .contact-form .submit-btn {
            background: linear-gradient(135deg, #c41e24, #e63038);
            color: #fff;
            border: none;
            padding: 16px 40px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 8px 30px rgba(196, 30, 36, 0.3);
            letter-spacing: 0.5px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .contact-form .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(196, 30, 36, 0.5);
            background: linear-gradient(135deg, #d42a30, #f03a42);
        }
        .contact-form .submit-btn i {
            font-size: 18px;
            transition: transform 0.3s;
        }
        .contact-form .submit-btn:hover i {
            transform: translateX(4px);
        }

        /* ===== 成功弹窗 (Modal) ===== */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(6px);
            z-index: 9999;
            justify-content: center;
            align-items: center;
            animation: fadeIn 0.3s ease;
        }
        .modal-overlay.active {
            display: flex;
        }
        .modal-box {
            background: #1a1a1a;
            border-radius: 28px;
            padding: 48px 40px 40px;
            max-width: 460px;
            width: 90%;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 40px 80px rgba(0, 0, 0, 0.6);
            animation: scaleUp 0.35s cubic-bezier(0.23, 1, 0.32, 1);
            position: relative;
        }
        .modal-box .modal-icon {
            font-size: 64px;
            color: #4caf50;
            background: rgba(76, 175, 80, 0.12);
            width: 80px;
            height: 80px;
            line-height: 80px;
            border-radius: 50%;
            margin: 0 auto 20px;
        }
        .modal-box h3 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 12px;
            color: #fff;
        }
        .modal-box p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 16px;
            line-height: 1.6;
            margin-bottom: 28px;
        }
        .modal-box .modal-btn {
            background: linear-gradient(135deg, #c41e24, #e63038);
            color: #fff;
            border: none;
            padding: 12px 40px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 6px 20px rgba(196, 30, 36, 0.3);
        }
        .modal-box .modal-btn:hover {
            transform: scale(1.04);
            box-shadow: 0 8px 30px rgba(196, 30, 36, 0.5);
        }
        .modal-box .modal-close {
            position: absolute;
            top: 16px;
            right: 20px;
            background: none;
            border: none;
            color: rgba(255, 255, 255, 0.3);
            font-size: 24px;
            cursor: pointer;
            transition: color 0.3s;
        }
        .modal-box .modal-close:hover {
            color: #fff;
        }

        @keyframes fadeIn {
            0% {
                opacity: 0;
            }
            100% {
                opacity: 1;
            }
        }
        @keyframes scaleUp {
            0% {
                transform: scale(0.9) translateY(20px);
                opacity: 0;
            }
            100% {
                transform: scale(1) translateY(0);
                opacity: 1;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: #0a0a0a;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 50px 60px 30px;
        }
        .footer-inner {
            max-width: 1280px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .footer-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 24px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .footer-brand i {
            font-size: 28px;
            color: #ff6b35;
        }
        .footer-brand .brand-name {
            font-size: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, #ff6b35, #c41e24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand .brand-en {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.3);
            letter-spacing: 1px;
            -webkit-text-fill-color: rgba(255, 255, 255, 0.3);
        }
        .footer-links {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #ff6b35;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.25);
        }
        .footer-bottom .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-bottom .footer-social a {
            color: rgba(255, 255, 255, 0.2);
            font-size: 18px;
            transition: color 0.3s, transform 0.2s;
        }
        .footer-bottom .footer-social a:hover {
            color: #ff6b35;
            transform: translateY(-2px);
        }

        /* ===== 中英切换辅助 ===== */
        .lang-zh.hide,
        .lang-en.hide {
            display: none !important;
        }
        .text-gradient {
            background: linear-gradient(135deg, #ff6b35, #c41e24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }