/* roulang page: index */
:root {
            --deep-blue: #080D20;
            --card-bg: #111830;
            --section-alt: #1A2340;
            --energy-orange: #FF6B35;
            --energy-orange-light: #FF8C5A;
            --text-primary: rgba(255, 255, 255, 0.9);
            --text-secondary: rgba(255, 255, 255, 0.75);
            --text-muted: rgba(255, 255, 255, 0.5);
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-card: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.18);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 6px;
            --radius-section: 16px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-card-hover: 0 12px 48px rgba(0, 0, 0, 0.55);
            --glow-orange: 0 0 24px rgba(255, 107, 53, 0.5);
            --glow-orange-hover: 0 0 40px rgba(255, 107, 53, 0.7);
            --transition-smooth: 300ms ease-out;
            --transition-bounce: 350ms cubic-bezier(0.25, 0.8, 0.25, 1.2);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            font-weight: 400;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            background-color: var(--deep-blue);
            overflow-x: hidden;
            min-height: 100vh;
        }

        body.menu-open {
            overflow: hidden;
            height: 100vh;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-smooth);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        input {
            font-family: inherit;
            outline: none;
            border: none;
        }

        /* 导航 */
        #nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            height: 72px;
            background: rgba(8, 13, 32, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth), height var(--transition-smooth);
        }

        #nav.scrolled {
            background: rgba(8, 13, 32, 0.95);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }

        #nav .nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        #nav .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        #nav .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--energy-orange), #e55a2b);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 900;
            color: #fff;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        #nav .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        #nav .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 0;
            transition: color var(--transition-smooth);
        }

        #nav .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--energy-orange);
            border-radius: 1px;
            transition: width var(--transition-smooth);
        }

        #nav .nav-links a:hover,
        #nav .nav-links a:focus-visible {
            color: #fff;
        }

        #nav .nav-links a:hover::after,
        #nav .nav-links a:focus-visible::after {
            width: 100%;
        }

        #nav .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            background: var(--energy-orange);
            color: #fff;
            white-space: nowrap;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 18px rgba(255, 107, 53, 0.4);
            letter-spacing: 0.3px;
            flex-shrink: 0;
        }

        #nav .nav-cta-btn:hover {
            box-shadow: var(--glow-orange-hover);
            transform: scale(1.03);
            background: #ff7d4f;
        }

        #nav .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
            background: transparent;
            border: none;
        }

        #nav .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 2px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }

        #nav .hamburger.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }

        #nav .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        #nav .hamburger.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* 移动端抽屉 */
        #mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(8, 13, 32, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-smooth);
        }

        #mobile-drawer.active {
            opacity: 1;
            pointer-events: auto;
        }

        #mobile-drawer a {
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            letter-spacing: 1px;
            transition: color var(--transition-smooth);
        }

        #mobile-drawer a:hover {
            color: var(--energy-orange);
        }

        #mobile-drawer .drawer-cta {
            margin-top: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            background: var(--energy-orange);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            box-shadow: var(--glow-orange);
            transition: all var(--transition-smooth);
        }

        #mobile-drawer .drawer-cta:hover {
            box-shadow: var(--glow-orange-hover);
            transform: scale(1.03);
        }

        /* Hero */
        #hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding-top: 72px;
        }

        #hero .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        #hero .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(8, 13, 32, 0.75) 0%,
                    rgba(8, 13, 32, 0.6) 40%,
                    rgba(8, 13, 32, 0.82) 100%);
            z-index: 1;
        }

        #hero .hero-glow-orb {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.18) 0%, transparent 70%);
            top: 25%;
            right: -8%;
            z-index: 2;
            pointer-events: none;
            animation: orbFloat 8s ease-in-out infinite;
        }

        @keyframes orbFloat {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            33% {
                transform: translate(-20px, -25px) scale(1.05);
            }
            66% {
                transform: translate(15px, 20px) scale(0.95);
            }
        }

        #hero .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 800px;
            padding: 0 24px;
        }

        #hero .hero-badge {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 20px;
            background: rgba(255, 107, 53, 0.15);
            border: 1px solid rgba(255, 107, 53, 0.3);
            color: var(--energy-orange-light);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 28px;
        }

        #hero h1 {
            font-size: clamp(34px, 5.5vw, 60px);
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }

        #hero h1 .highlight {
            color: var(--energy-orange);
            position: relative;
        }

        #hero .hero-subtitle {
            font-size: clamp(17px, 2vw, 20px);
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0 auto 36px;
            max-width: 580px;
        }

        #hero .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        #hero .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 36px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 700;
            background: var(--energy-orange);
            color: #fff;
            letter-spacing: 0.5px;
            box-shadow: var(--glow-orange);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        #hero .btn-primary-glow:hover {
            box-shadow: var(--glow-orange-hover);
            transform: scale(1.03);
            background: #ff7d4f;
        }

        #hero .btn-secondary-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 36px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            letter-spacing: 0.5px;
            transition: all var(--transition-smooth);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        #hero .btn-secondary-glass:hover {
            border-color: rgba(255, 255, 255, 0.6);
            background: rgba(255, 255, 255, 0.05);
            box-shadow: 0 0 20px rgba(255, 255, 255, 0.08);
        }

        #hero .scroll-hint {
            position: absolute;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 3;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            color: var(--text-muted);
            font-size: 12px;
            letter-spacing: 1px;
            animation: hintPulse 2s ease-in-out infinite;
        }

        #hero .scroll-hint .arrow-down {
            width: 20px;
            height: 20px;
            border-right: 2px solid var(--text-muted);
            border-bottom: 2px solid var(--text-muted);
            transform: rotate(45deg);
        }

        @keyframes hintPulse {
            0%,
            100% {
                opacity: 0.5;
                transform: translateX(-50%) translateY(0);
            }
            50% {
                opacity: 1;
                transform: translateX(-50%) translateY(6px);
            }
        }

        /* 通用区块 */
        .section-block {
            padding: 80px 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-title {
            text-align: center;
            font-size: clamp(26px, 3.5vw, 38px);
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
            margin: 0 0 12px;
            letter-spacing: 0.5px;
        }

        .section-subtitle {
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            margin: 0 auto 48px;
            max-width: 560px;
            line-height: 1.6;
        }

        /* 玻璃拟态卡片 */
        .glass-card {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-bounce);
            position: relative;
            overflow: hidden;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

        .glass-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-card-hover);
        }

        .glass-card:hover::before {
            opacity: 1;
        }

        .glass-card.featured {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 107, 53, 0.2);
            box-shadow: 0 8px 40px rgba(255, 107, 53, 0.12), 0 8px 32px rgba(0, 0, 0, 0.4);
        }

        .glass-card.featured:hover {
            border-color: rgba(255, 107, 53, 0.4);
            box-shadow: 0 12px 52px rgba(255, 107, 53, 0.2), 0 12px 48px rgba(0, 0, 0, 0.55);
        }

        .glass-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: rgba(255, 107, 53, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 24px;
            color: var(--energy-orange);
            transition: all var(--transition-smooth);
        }

        .glass-card:hover .card-icon {
            background: rgba(255, 107, 53, 0.2);
            box-shadow: 0 0 18px rgba(255, 107, 53, 0.25);
        }

        .glass-card .card-title {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 10px;
            letter-spacing: 0.3px;
        }

        .glass-card .card-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0 0 16px;
        }

        .glass-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--energy-orange-light);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-smooth);
        }

        .glass-card .card-link:hover {
            color: #fff;
            gap: 8px;
        }

        .glass-card .card-link .arrow {
            transition: transform var(--transition-smooth);
        }

        .glass-card .card-link:hover .arrow {
            transform: translateX(3px);
        }

        /* 结果数字区 */
        #results {
            background: var(--section-alt);
            position: relative;
            overflow: hidden;
        }

        #results::before {
            content: '';
            position: absolute;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.07) 0%, transparent 70%);
            top: -10%;
            left: -5%;
            pointer-events: none;
        }

        .stat-number {
            font-size: clamp(40px, 5vw, 52px);
            font-weight: 700;
            background: linear-gradient(135deg, #FF6B35, #FF8C5A, #FFA878);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.1;
        }

        /* 证言卡片 */
        .testimonial-card {
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            transition: all var(--transition-bounce);
            position: relative;
        }

        .testimonial-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            background: rgba(255, 107, 53, 0.04);
        }

        .testimonial-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid rgba(255, 107, 53, 0.4);
            flex-shrink: 0;
        }

        /* CTA区 */
        #cta-main {
            position: relative;
            overflow: hidden;
            background: var(--section-alt);
        }

        #cta-main .cta-glow-center {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.1) 0%, transparent 65%);
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            pointer-events: none;
        }

        .input-field {
            width: 100%;
            padding: 14px 18px;
            border-radius: var(--radius-input);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 15px;
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
        }

        .input-field::placeholder {
            color: var(--text-muted);
        }
        .input-field:focus {
            border-color: var(--energy-orange);
            box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
            background: rgba(255, 255, 255, 0.07);
            outline: none;
        }

        .btn-submit-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            background: var(--energy-orange);
            color: #fff;
            letter-spacing: 0.5px;
            box-shadow: var(--glow-orange);
            transition: all var(--transition-smooth);
            cursor: pointer;
            white-space: nowrap;
            border: none;
            width: 100%;
        }

        .btn-submit-glow:hover {
            box-shadow: var(--glow-orange-hover);
            transform: scale(1.03);
            background: #ff7d4f;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 0;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            letter-spacing: 0.3px;
            transition: color var(--transition-smooth);
            font-family: inherit;
        }

        .faq-question:hover {
            color: var(--energy-orange-light);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--energy-orange);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .faq-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            position: relative;
            transition: transform var(--transition-smooth);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--energy-orange);
            border-radius: 2px;
            transition: all var(--transition-smooth);
        }

        .faq-icon::before {
            width: 14px;
            height: 2px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .faq-icon::after {
            width: 2px;
            height: 14px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        .faq-item.active .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg) scaleY(0);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 350ms ease, padding 350ms ease;
            padding: 0 0;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 0 18px;
        }

        /* 页脚 */
        #footer {
            background: #060B1A;
            border-top: 1px solid var(--border-subtle);
            padding: 56px 24px 28px;
        }

        #footer a {
            color: var(--text-muted);
            transition: color var(--transition-smooth);
        }

        #footer a:hover {
            color: var(--energy-orange);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            #nav .nav-links {
                gap: 20px;
            }
            #nav .nav-links a {
                font-size: 14px;
            }
            #hero h1 {
                font-size: clamp(32px, 6vw, 48px);
            }
            .section-block {
                padding: 60px 20px;
            }
        }

        @media (max-width: 768px) {
            #nav {
                height: 60px;
            }
            #nav .nav-links {
                display: none;
            }
            #nav .nav-cta-btn.desktop-only {
                display: none;
            }
            #nav .nav-cta-btn.mobile-keep {
                display: inline-flex;
                font-size: 13px;
                padding: 8px 14px;
            }
            #nav .hamburger {
                display: flex;
            }
            #hero {
                min-height: 90vh;
                padding-top: 60px;
            }
            #hero h1 {
                font-size: clamp(30px, 8vw, 40px);
            }
            #hero .hero-subtitle {
                font-size: 15px;
            }
            #hero .hero-buttons {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            #hero .btn-primary-glow,
            #hero .btn-secondary-glass {
                width: 100%;
                max-width: 320px;
                padding: 14px 24px;
                font-size: 15px;
            }
            .section-block {
                padding: 48px 16px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 32px;
            }
            .glass-card {
                padding: 24px 20px;
            }
            #footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                text-align: center;
            }
            #cta-main .cta-form-row {
                flex-direction: column;
                gap: 12px;
            }
            .stat-number {
                font-size: 36px;
            }
        }

        @media (max-width: 520px) {
            #nav .nav-logo {
                font-size: 18px;
            }
            #nav .nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 16px;
                border-radius: 6px;
            }
            #nav .nav-cta-btn.mobile-keep {
                font-size: 12px;
                padding: 7px 12px;
            }
            #hero h1 {
                font-size: 28px;
            }
            #hero .hero-subtitle {
                font-size: 14px;
                max-width: 100%;
            }
            .glass-card {
                padding: 20px 16px;
            }
            .glass-card .card-title {
                font-size: 17px;
            }
            .glass-card .card-desc {
                font-size: 14px;
            }
            .testimonial-card {
                padding: 20px 16px;
            }
            .section-title {
                font-size: 22px;
            }
            .stat-number {
                font-size: 30px;
            }
            #footer {
                padding: 40px 16px 20px;
            }
        }

        @media (min-width: 769px) {
            #nav .nav-cta-btn.mobile-keep {
                display: none;
            }
            #nav .nav-cta-btn.desktop-only {
                display: inline-flex;
            }
        }

        /* 可访问性 */
        *:focus-visible {
            outline: 2px solid var(--energy-orange);
            outline-offset: 2px;
            border-radius: 2px;
        }

        /* 选中文字 */
        ::selection {
            background: rgba(255, 107, 53, 0.35);
            color: #fff;
        }