/* roulang page: index */
:root {
            --bg-deep: #09090C;
            --bg-mid: #191822;
            --bg-container: rgba(20, 20, 30, 0.7);
            --neon-pink: #FF006E;
            --neon-purple: #7000FF;
            --neon-cyan: #00F0FF;
            --neon-deep-purple: #5700FF;
            --gold: #FFC700;
            --text-bright: #F2F2F7;
            --text-silver: #C0C0CC;
            --text-muted: #888899;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glow: rgba(255, 255, 255, 0.12);
            --radius-card: 20px;
            --radius-btn: 9999px;
            --shadow-glow-pink: 0 0 18px rgba(255, 0, 110, 0.35);
            --shadow-glow-purple: 0 0 22px rgba(112, 0, 255, 0.4);
            --shadow-glow-gold: 0 0 14px rgba(255, 199, 0, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-card-hover: 0 12px 40px rgba(255, 0, 110, 0.25), 0 0 60px rgba(112, 0, 255, 0.18);
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --nav-height: 64px;
            --container-max: 1200px;
            --section-gap: 80px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--nav-height);
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg-deep);
            color: var(--text-silver);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease, text-shadow 0.25s ease;
        }
        a:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }
        img {
            display: block;
            max-width: 100%;
            height: auto;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: all 0.25s ease;
        }
        button:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 3px;
            border-radius: 8px;
        }
        input,
        textarea {
            font-family: inherit;
            transition: all 0.3s ease;
        }
        input:focus-visible,
        textarea:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.5);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 导航栏 ===== */
        #site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 9999;
            height: var(--nav-height);
            background: rgba(12, 12, 18, 0.78);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            transition: border-color 0.4s ease, background 0.4s ease;
        }
        #site-header.scrolled {
            border-bottom-color: rgba(255, 0, 110, 0.25);
            background: rgba(10, 10, 16, 0.85);
            box-shadow: 0 2px 24px rgba(255, 0, 110, 0.08);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: 0.03em;
            color: var(--text-bright);
            white-space: nowrap;
            text-shadow: 0 0 12px rgba(255, 0, 110, 0.5);
            flex-shrink: 0;
        }
        .nav-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: linear-gradient(135deg, #FF006E, #7000FF);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #fff;
            box-shadow: var(--shadow-glow-pink);
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            flex-wrap: nowrap;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            font-size: 0.9rem;
            font-weight: 500;
            color: #b0b0be;
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: all 0.3s ease;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: #fff;
            background: rgba(255, 0, 110, 0.15);
            text-shadow: 0 0 10px rgba(255, 0, 110, 0.7);
            box-shadow: inset 0 0 0 1px rgba(255, 0, 110, 0.4);
        }
        .nav-cta-btn {
            display: inline-block;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            font-size: 0.88rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            background: linear-gradient(135deg, #FF006E, #7000FF);
            color: #fff;
            white-space: nowrap;
            box-shadow: var(--shadow-glow-pink);
            transition: all 0.3s ease;
        }
        .nav-cta-btn:hover {
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-glow);
            color: var(--text-bright);
            font-size: 1.2rem;
            background: rgba(20, 20, 30, 0.6);
            transition: all 0.3s ease;
            flex-shrink: 0;
        }
        .mobile-toggle:hover {
            border-color: rgba(255, 0, 110, 0.5);
            box-shadow: var(--shadow-glow-pink);
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                gap: 2px;
                background: rgba(10, 10, 18, 0.95);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 16px 20px;
                border-bottom: 1px solid rgba(255, 0, 110, 0.2);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s cubic-bezier(0.22, 0.61, 0.36, 1), opacity 0.3s ease;
                z-index: 9998;
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                display: block;
                text-align: center;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-cta-btn {
                display: block;
                text-align: center;
                margin-top: 6px;
            }
            .mobile-toggle {
                display: flex;
            }
            .nav-links .nav-cta-wrap {
                display: block;
                width: 100%;
                text-align: center;
            }
            .nav-links .nav-cta-wrap .nav-cta-btn {
                display: inline-block;
                width: auto;
                min-width: 160px;
            }
        }
        @media (min-width: 769px) {
            .mobile-toggle {
                display: none;
            }
            .nav-links {
                display: flex !important;
                opacity: 1 !important;
                pointer-events: auto !important;
                position: static;
                flex-direction: row;
                background: transparent;
                backdrop-filter: none;
                -webkit-backdrop-filter: none;
                padding: 0;
                border: none;
                box-shadow: none;
                transform: none;
            }
            .nav-cta-wrap {
                display: flex;
                align-items: center;
            }
        }

        /* ===== Hero 区 ===== */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            background: linear-gradient(160deg, #09090C 0%, #12101a 30%, #0d0b16 60%, #09090C 100%);
            padding-top: var(--nav-height);
        }
        #hero .hero-bg-img {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
            filter: saturate(0.6) brightness(0.5);
        }
        #hero .hero-particles {
            position: absolute;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            overflow: hidden;
        }
        .particle {
            position: absolute;
            border-radius: 50%;
            animation: floatUp 7s infinite ease-in-out;
            opacity: 0;
        }
        .particle:nth-child(1) {
            width: 3px;
            height: 3px;
            background: #FF006E;
            left: 15%;
            bottom: 10%;
            animation-delay: 0s;
        }
        .particle:nth-child(2) {
            width: 2px;
            height: 2px;
            background: #7000FF;
            left: 30%;
            bottom: 20%;
            animation-delay: 1.2s;
        }
        .particle:nth-child(3) {
            width: 4px;
            height: 4px;
            background: #FFC700;
            left: 50%;
            bottom: 5%;
            animation-delay: 2.4s;
        }
        .particle:nth-child(4) {
            width: 2px;
            height: 2px;
            background: #00F0FF;
            left: 68%;
            bottom: 15%;
            animation-delay: 3.6s;
        }
        .particle:nth-child(5) {
            width: 3px;
            height: 3px;
            background: #FF006E;
            left: 80%;
            bottom: 8%;
            animation-delay: 4.8s;
        }
        .particle:nth-child(6) {
            width: 2px;
            height: 2px;
            background: #5700FF;
            left: 22%;
            bottom: 30%;
            animation-delay: 5.5s;
        }
        .particle:nth-child(7) {
            width: 3px;
            height: 3px;
            background: #FFC700;
            left: 75%;
            bottom: 25%;
            animation-delay: 1.8s;
        }
        .particle:nth-child(8) {
            width: 2px;
            height: 2px;
            background: #FF006E;
            left: 42%;
            bottom: 12%;
            animation-delay: 3s;
        }
        @keyframes floatUp {
            0% {
                transform: translateY(0) scale(0);
                opacity: 0;
            }
            20% {
                opacity: 0.9;
            }
            50% {
                transform: translateY(-280px) scale(1.6);
                opacity: 0.7;
            }
            100% {
                transform: translateY(-600px) scale(0.2);
                opacity: 0;
            }
        }
        #hero .hero-overlay {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 0 24px;
        }
        #hero .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: var(--radius-btn);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: #FFC700;
            border: 1px solid rgba(255, 199, 0, 0.35);
            background: rgba(255, 199, 0, 0.06);
            margin-bottom: 24px;
            text-shadow: 0 0 8px rgba(255, 199, 0, 0.4);
        }
        #hero h1 {
            font-family: var(--font-heading);
            font-size: clamp(2.2rem, 5.5vw, 3.8rem);
            font-weight: 800;
            letter-spacing: 0.04em;
            color: var(--text-bright);
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 0 30px rgba(255, 0, 110, 0.4), 0 0 60px rgba(112, 0, 255, 0.25);
        }
        #hero h1 .gradient-text {
            background: linear-gradient(135deg, #FF006E, #C000FF, #7000FF);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline;
        }
        #hero .hero-subtitle-wrap {
            font-size: 1.1rem;
            color: #b8b8c8;
            margin-bottom: 36px;
            letter-spacing: 0.03em;
            min-height: 28px;
        }
        #hero .hero-subtitle-wrap .rotating-text {
            display: inline-block;
            font-weight: 500;
            color: #d0d0da;
            border-right: 2px solid #FF006E;
            padding-right: 6px;
            animation: blink 0.8s step-end infinite;
        }
        @keyframes blink {
            50% {
                border-color: transparent;
            }
        }
        #hero .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
        }
        .btn-primary {
            display: inline-block;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.04em;
            background: linear-gradient(135deg, #FF006E, #7000FF);
            color: #fff;
            box-shadow: var(--shadow-glow-pink);
            transition: all 0.35s ease;
            border: none;
            position: relative;
            overflow: hidden;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-2px);
            background: linear-gradient(135deg, #FF1a7e, #8520FF);
        }
        .btn-outline {
            display: inline-block;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.04em;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            transition: all 0.35s ease;
            box-shadow: 0 0 0 rgba(255, 255, 255, 0);
        }
        .btn-outline:hover {
            border-color: rgba(255, 0, 110, 0.7);
            box-shadow: 0 0 20px rgba(255, 0, 110, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== 板块通用 ===== */
        section {
            padding: var(--section-gap) 0;
            position: relative;
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-family: var(--font-heading);
            font-size: clamp(1.6rem, 3.2vw, 2.3rem);
            font-weight: 700;
            color: var(--text-bright);
            letter-spacing: 0.04em;
            margin-bottom: 10px;
            display: inline-flex;
            align-items: center;
            gap: 12px;
        }
        .section-header h2 .decor-line {
            display: inline-block;
            width: 42px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, #FF006E, #7000FF);
        }
        .section-header h2 .section-num {
            font-size: 0.7em;
            font-weight: 400;
            color: #FFC700;
            opacity: 0.8;
            letter-spacing: 0.08em;
        }
        .section-header .section-sub {
            color: #9999aa;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            margin-top: 4px;
        }

        /* ===== 服务卡片 ===== */
        #services {
            background: var(--bg-mid);
            position: relative;
        }
        #services::before {
            content: '';
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 0, 110, 0.3), rgba(112, 0, 255, 0.3), transparent);
        }
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--bg-container);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            transition: all 0.4s ease;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, #FF006E, #7000FF);
            opacity: 0;
            transition: opacity 0.4s ease;
            border-radius: 3px 3px 0 0;
        }
        .service-card:hover {
            border-color: rgba(255, 0, 110, 0.35);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-6px);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card .card-img {
            width: 100%;
            height: 180px;
            border-radius: 14px;
            overflow: hidden;
            margin-bottom: 20px;
            background: #1a1a28;
            position: relative;
        }
        .service-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .service-card:hover .card-img img {
            transform: scale(1.05);
        }
        .service-card .card-img .img-placeholder {
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            background: linear-gradient(135deg, rgba(255, 0, 110, 0.2), rgba(112, 0, 255, 0.2));
            color: rgba(255, 255, 255, 0.6);
            border-radius: 14px;
        }
        .service-card h3 {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-bright);
            margin-bottom: 8px;
            letter-spacing: 0.03em;
        }
        .service-card p {
            font-size: 0.9rem;
            color: #a0a0b0;
            line-height: 1.6;
        }
        .service-card .card-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-btn);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-top: 14px;
            border: 1px solid rgba(255, 199, 0, 0.4);
            color: #FFC700;
            background: rgba(255, 199, 0, 0.06);
        }

        /* ===== 荣耀数据区 ===== */
        #achievements {
            background: var(--bg-deep);
            position: relative;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 28px 16px;
            border-radius: var(--radius-card);
            background: var(--bg-container);
            border: 1px solid var(--border-subtle);
            transition: all 0.35s ease;
        }
        .stat-item:hover {
            border-color: rgba(255, 199, 0, 0.4);
            box-shadow: var(--shadow-glow-gold);
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 3.5vw, 2.8rem);
            font-weight: 800;
            letter-spacing: 0.03em;
            background: linear-gradient(135deg, #FFC700, #FF8C00, #FFC700);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 6px;
            line-height: 1.1;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: #b0b0be;
            letter-spacing: 0.04em;
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 1.6rem;
            margin-bottom: 10px;
            display: inline-block;
            color: #FFC700;
            opacity: 0.8;
        }

        /* ===== 案例区 ===== */
        #cases {
            background: var(--bg-mid);
            position: relative;
        }
        #cases::before {
            content: '';
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 199, 0, 0.25), transparent);
        }
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .case-card {
            background: var(--bg-container);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all 0.4s ease;
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .case-card:hover {
            border-color: rgba(255, 0, 110, 0.35);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-5px);
        }
        .case-card .case-img {
            width: 100%;
            height: 240px;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }
        .case-card:hover .case-img {
            transform: scale(1.04);
        }
        .case-card .case-body {
            padding: 22px 20px;
            position: relative;
        }
        .case-card .case-body::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10%;
            width: 3px;
            height: 60%;
            background: linear-gradient(180deg, #FF006E, #7000FF);
            border-radius: 0 3px 3px 0;
        }
        .case-card .case-badge {
            position: absolute;
            top: -16px;
            right: 16px;
            background: linear-gradient(135deg, #FFC700, #e6a800);
            color: #1a1a10;
            font-weight: 700;
            font-size: 0.7rem;
            letter-spacing: 0.06em;
            padding: 5px 14px;
            border-radius: var(--radius-btn);
            box-shadow: 0 0 12px rgba(255, 199, 0, 0.4);
            z-index: 2;
        }
        .case-card h3 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-bright);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
            padding-left: 14px;
        }
        .case-card p {
            font-size: 0.88rem;
            color: #a0a0b0;
            padding-left: 14px;
            line-height: 1.5;
        }

        /* ===== 制胜方案区 ===== */
        #solutions {
            background: var(--bg-deep);
            position: relative;
        }
        .solutions-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .solution-item {
            background: var(--bg-container);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-card);
            padding: 28px 22px;
            text-align: center;
            transition: all 0.35s ease;
            box-shadow: var(--shadow-card);
        }
        .solution-item:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.2);
            transform: translateY(-4px);
        }
        .solution-item .sol-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(87, 0, 255, 0.2));
            color: #00F0FF;
            border: 1px solid rgba(0, 240, 255, 0.3);
        }
        .solution-item h3 {
            font-family: var(--font-heading);
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-bright);
            margin-bottom: 6px;
        }
        .solution-item p {
            font-size: 0.85rem;
            color: #a0a0b0;
            line-height: 1.5;
        }

        /* ===== FAQ 区 ===== */
        #faq {
            background: var(--bg-mid);
            position: relative;
        }
        #faq::before {
            content: '';
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(112, 0, 255, 0.3), rgba(255, 0, 110, 0.3), transparent);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            transition: all 0.3s ease;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 8px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--text-bright);
            letter-spacing: 0.02em;
            background: transparent;
            border: none;
            text-align: left;
            cursor: pointer;
            transition: all 0.3s ease;
            gap: 14px;
        }
        .faq-question:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(255, 0, 110, 0.4);
        }
        .faq-arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: #888;
            transition: all 0.35s ease;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: #FF006E;
            border-color: rgba(255, 0, 110, 0.5);
            box-shadow: 0 0 10px rgba(255, 0, 110, 0.3);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s cubic-bezier(0.22, 0.61, 0.36, 1), padding 0.4s ease;
            padding: 0 8px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 4px 8px 20px;
        }
        .faq-answer p {
            font-size: 0.9rem;
            color: #b0b0be;
            line-height: 1.7;
            background: rgba(20, 20, 30, 0.4);
            border-radius: 12px;
            padding: 14px 16px;
            border-left: 2px solid rgba(255, 0, 110, 0.3);
        }

        /* ===== CTA 联系区 ===== */
        #contact {
            background: linear-gradient(180deg, #0a0a12 0%, #0d0b18 50%, #09090C 100%);
            position: relative;
        }
        .cta-inner {
            max-width: 600px;
            margin: 0 auto;
            text-align: center;
        }
        .cta-inner h2 {
            font-family: var(--font-heading);
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            color: var(--text-bright);
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }
        .cta-inner .cta-sub {
            color: #b0b0be;
            font-size: 0.95rem;
            margin-bottom: 32px;
        }
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
            text-align: left;
        }
        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 14px 18px;
            border-radius: 14px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(20, 20, 30, 0.6);
            color: #fff;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: all 0.3s ease;
            resize: vertical;
        }
        .contact-form input::placeholder,
        .contact-form textarea::placeholder {
            color: #666;
        }
        .contact-form input:focus,
        .contact-form textarea:focus {
            border-color: rgba(0, 240, 255, 0.6);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
            background: rgba(20, 20, 30, 0.8);
        }
        .contact-form textarea {
            min-height: 120px;
        }
        .contact-form .btn-submit {
            align-self: center;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.05em;
            background: linear-gradient(135deg, #FF006E, #7000FF);
            color: #fff;
            box-shadow: var(--shadow-glow-pink);
            transition: all 0.35s ease;
            border: none;
            cursor: pointer;
        }
        .contact-form .btn-submit:hover {
            box-shadow: var(--shadow-glow-purple);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        #site-footer {
            background: #07070a;
            padding: 48px 0 28px;
            text-align: center;
            border-top: 1px solid var(--border-subtle);
        }
        .footer-logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.3rem;
            letter-spacing: 0.05em;
            color: var(--text-bright);
            margin-bottom: 8px;
            text-shadow: 0 0 10px rgba(255, 0, 110, 0.3);
        }
        .footer-tagline {
            font-size: 0.85rem;
            color: #777;
            margin-bottom: 20px;
            letter-spacing: 0.03em;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
            margin-bottom: 20px;
            list-style: none;
        }
        .footer-links a {
            font-size: 0.85rem;
            color: #888;
            letter-spacing: 0.02em;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #FF006E;
            text-shadow: 0 0 8px rgba(255, 0, 110, 0.4);
        }
        .footer-copy {
            font-size: 0.78rem;
            color: #555;
            letter-spacing: 0.02em;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .cases-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 56px;
            }
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .solutions-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cases-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            #hero {
                min-height: 90vh;
            }
            #hero h1 {
                font-size: 1.8rem;
            }
            #hero .hero-subtitle-wrap {
                font-size: 0.9rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .service-card .card-img {
                height: 150px;
            }
            .case-card .case-img {
                height: 180px;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 10px;
            }
            .stat-item .stat-number {
                font-size: 1.5rem;
            }
            .stat-item .stat-label {
                font-size: 0.78rem;
            }
            #hero h1 {
                font-size: 1.5rem;
            }
            #hero .hero-btns {
                flex-direction: column;
                gap: 10px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .solutions-list {
                grid-template-columns: 1fr;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.8rem;
            }
        }