/* ========== CSS 变量 ========== */
        :root {
            --bg-0: #06081A;
            --bg-1: #0A0E27;
            --bg-2: #101538;
            --card: rgba(255,255,255,0.035);
            --card-border: rgba(255,255,255,0.09);
            --card-border-hover: rgba(129,140,248,0.5);
            --text-1: #F4F6FF;
            --text-2: #A5ACC8;
            --text-3: #6B7394;
            --accent: #818CF8;
            --accent-2: #22D3EE;
            --accent-3: #C084FC;
            --grad: linear-gradient(135deg, #818CF8 0%, #22D3EE 100%);
            --shadow-glow: 0 8px 40px rgba(99,102,241,0.35);
        }

        /* ========== 基础重置 ========== */
        *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-2); line-height: 1.6; background: var(--bg-0);
            overflow-x: hidden;
        }
        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }
        button { font-family: inherit; }
        ::selection { background: rgba(129,140,248,0.4); color: #fff; }
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-0); }
        ::-webkit-scrollbar-thumb { background: #2A2F52; border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: #3A3F6A; }

        /* 噪点质感层 */
        .noise-overlay {
            position: fixed; inset: 0; z-index: 1500; pointer-events: none; opacity: 0.032;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
        }

        /* 顶部滚动进度条 */
        .scroll-progress {
            position: fixed; top: 0; left: 0; height: 3px; width: 0;
            background: var(--grad); z-index: 2000; border-radius: 0 2px 2px 0;
        }

        /* 鼠标光晕 */
        .cursor-glow {
            position: fixed; width: 500px; height: 500px; border-radius: 50%;
            background: radial-gradient(circle, rgba(99,102,241,0.10) 0%, transparent 65%);
            pointer-events: none; z-index: 0; transform: translate(-50%, -50%);
            transition: opacity 0.3s; opacity: 0;
        }

        /* ========== 导航栏 ========== */
        .navbar {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            display: flex; align-items: center; justify-content: space-between;
            padding: 0 64px; height: 76px;
            background: rgba(6,8,26,0.55); backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid transparent;
            transition: all 0.35s ease;
        }
        .navbar.scrolled {
            background: rgba(6,8,26,0.82);
            border-bottom: 1px solid rgba(255,255,255,0.07);
            box-shadow: 0 8px 32px rgba(0,0,0,0.35);
        }
        .nav-logo { font-size: 22px; font-weight: 800; letter-spacing: 2px; color: var(--text-1); display: flex; align-items: center; gap: 10px; }
        .nav-logo .logo-mark {
            width: 34px; height: 34px; border-radius: 10px; background: var(--grad);
            display: flex; align-items: center; justify-content: center;
            font-size: 16px; font-weight: 900; color: #fff;
            box-shadow: 0 0 24px rgba(129,140,248,0.45);
        }
        .nav-logo span { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
        .nav-links { display: flex; gap: 40px; }
        .nav-links a {
            font-size: 15px; color: var(--text-2); font-weight: 500; position: relative;
            padding: 6px 2px; transition: color 0.25s;
        }
        .nav-links a::after {
            content: ''; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
            background: var(--grad); border-radius: 2px; transition: width 0.3s ease;
        }
        .nav-links a:hover { color: #fff; }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active { color: #fff; }
        .nav-links a.active::after { width: 100%; }
        .nav-btn {
            padding: 11px 30px; border-radius: 100px; font-size: 14px; font-weight: 600;
            background: var(--grad); color: #fff; border: none; cursor: pointer;
            transition: all 0.25s; box-shadow: 0 4px 18px rgba(99,102,241,0.35);
        }
        .nav-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(99,102,241,0.5); }

        /* 移动端汉堡菜单 */
        .menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
        .menu-toggle span { display: block; width: 24px; height: 2px; background: var(--text-1); margin: 5px 0; transition: 0.3s; border-radius: 2px; }
        .menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .menu-toggle.open span:nth-child(2) { opacity: 0; }
        .menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
        .mobile-menu {
            position: fixed; top: 76px; left: 0; right: 0; z-index: 999;
            background: rgba(6,8,26,0.95); backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            display: flex; flex-direction: column; padding: 12px 24px 24px; gap: 4px;
            transform: translateY(-12px); opacity: 0; pointer-events: none; transition: all 0.3s;
        }
        .mobile-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
        .mobile-menu a { padding: 14px 8px; font-size: 16px; color: var(--text-2); border-radius: 10px; transition: all 0.2s; }
        .mobile-menu a:hover { background: rgba(255,255,255,0.05); color: #fff; }

        /* ========== Hero ========== */
        .hero {
            min-height: 100vh; display: flex; align-items: center; justify-content: center;
            text-align: center; padding: 140px 24px 100px;
            position: relative; overflow: hidden;
            background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99,102,241,0.22) 0%, transparent 60%),
                        var(--bg-0);
        }
        /* 网格背景 */
        .hero-grid-bg {
            position: absolute; inset: 0;
            background-image:
                linear-gradient(rgba(129,140,248,0.06) 1px, transparent 1px),
                linear-gradient(90deg, rgba(129,140,248,0.06) 1px, transparent 1px);
            background-size: 56px 56px;
            -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 20%, transparent 75%);
            mask-image: radial-gradient(ellipse 75% 65% at 50% 40%, #000 20%, transparent 75%);
        }
        /* 极光光斑 */
        .orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.5; animation: float 14s ease-in-out infinite; }
        .orb-1 { width: 480px; height: 480px; background: rgba(99,102,241,0.28); top: -120px; left: -80px; }
        .orb-2 { width: 420px; height: 420px; background: rgba(34,211,238,0.16); bottom: -100px; right: -60px; animation-delay: -5s; }
        .orb-3 { width: 300px; height: 300px; background: rgba(192,132,252,0.15); top: 30%; right: 12%; animation-delay: -9s; }
        @keyframes float {
            0%, 100% { transform: translate(0, 0) scale(1); }
            33% { transform: translate(30px, -40px) scale(1.08); }
            66% { transform: translate(-25px, 25px) scale(0.95); }
        }
        /* 装饰粒子（多彩圆点） */
        .particle {
            position: absolute; border-radius: 50%;
            background: rgba(129,140,248,0.6);
            width: 3px; height: 3px;
            animation: twinkle 4s ease-in-out infinite;
        }
        @keyframes twinkle {
            0%, 100% { opacity: 0.15; transform: scale(0.6); }
            50% { opacity: 1; transform: scale(1.25); }
        }
        .hero-content { position: relative; z-index: 2; max-width: 860px; }
        .hero-content > * {
            opacity: 0; transform: translateY(28px);
            animation: heroIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards;
        }
        .hero-content > *:nth-child(1) { animation-delay: 0.1s; }
        .hero-content > *:nth-child(2) { animation-delay: 0.25s; }
        .hero-content > *:nth-child(3) { animation-delay: 0.42s; }
        .hero-content > *:nth-child(4) { animation-delay: 0.58s; }
        @keyframes heroIn { to { opacity: 1; transform: translateY(0); } }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 8px 20px; border-radius: 100px; margin-bottom: 32px;
            background: rgba(129,140,248,0.1); border: 1px solid rgba(129,140,248,0.3);
            color: #C7D2FE; font-size: 13px; font-weight: 600; letter-spacing: 1px;
        }
        .hero-badge .dot {
            width: 7px; height: 7px; border-radius: 50%; background: #34D399;
            box-shadow: 0 0 10px #34D399; animation: pulse 2s ease-in-out infinite;
        }
        @keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }
        .hero h1 {
            font-size: 64px; font-weight: 800; line-height: 1.18; margin-bottom: 28px;
            color: var(--text-1); letter-spacing: 2px;
        }
        .hero h1 .highlight {
            background: linear-gradient(120deg, #818CF8 0%, #22D3EE 45%, #C084FC 90%);
            background-size: 200% auto;
            -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
            animation: shine 6s linear infinite;
        }
        @keyframes shine { to { background-position: 200% center; } }
        .hero p { font-size: 19px; color: var(--text-2); max-width: 620px; margin: 0 auto 44px; line-height: 1.9; }
        .hero-buttons { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
        .btn-primary {
            position: relative; padding: 17px 44px; border-radius: 14px; font-size: 16px; font-weight: 700;
            background: linear-gradient(135deg, #6366F1 0%, #22D3EE 50%, #8B5CF6 100%);
            background-size: 200% auto; color: #fff; border: none; cursor: pointer; overflow: hidden;
            transition: all 0.3s, background-position 0.5s ease; box-shadow: var(--shadow-glow); letter-spacing: 1px;
        }
        .btn-primary:hover { background-position: right center; }
        .btn-primary::after {
            content: ''; position: absolute; top: 0; left: -80%; width: 50%; height: 100%;
            background: linear-gradient(100deg, transparent, rgba(255,255,255,0.35), transparent);
            transform: skewX(-20deg); transition: left 0.6s ease;
        }
        .btn-primary:hover::after { left: 130%; }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 44px rgba(99,102,241,0.55); }
        .btn-outline {
            padding: 16px 44px; border-radius: 14px; font-size: 16px; font-weight: 600; letter-spacing: 1px;
            background: rgba(255,255,255,0.04); color: var(--text-1);
            border: 1.5px solid rgba(255,255,255,0.18); cursor: pointer; transition: all 0.3s;
        }
        .btn-outline:hover { border-color: rgba(129,140,248,0.7); background: rgba(129,140,248,0.12); transform: translateY(-3px); }
        /* 滚动提示 */
        .scroll-hint {
            position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
            z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 10px;
            color: var(--text-3); font-size: 12px; letter-spacing: 3px;
        }
        .scroll-hint .mouse {
            width: 26px; height: 42px; border: 2px solid rgba(255,255,255,0.25); border-radius: 14px;
            display: flex; justify-content: center; padding-top: 8px;
        }
        .scroll-hint .wheel { width: 3px; height: 8px; border-radius: 2px; background: var(--accent); animation: wheel 1.8s ease-in-out infinite; }
        @keyframes wheel { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(12px); opacity: 0; } 100% { opacity: 0; } }
        /* Hero 悬浮数据卡片 */
        .hero-chip {
            position: absolute; z-index: 2; display: flex; align-items: center; gap: 11px;
            padding: 12px 20px; border-radius: 100px; white-space: nowrap;
            background: rgba(255,255,255,0.045); border: 1px solid rgba(255,255,255,0.12);
            backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 10px 32px rgba(0,0,0,0.3);
            font-size: 14px; color: var(--text-1); font-weight: 600;
            animation: float 9s ease-in-out infinite;
        }
        .hero-chip .c-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
        .hero-chip b { color: #fff; font-size: 17px; margin-right: 5px; }
        .hero-chip .c-sub { display: block; font-size: 11.5px; color: var(--text-3); font-weight: 500; margin-top: 3px; }
        /* 散布位置（16 徽章环绕） */
        /* 左列 */
        .hero-chip.c1  { left: 5%;  top: 20%; }
        .hero-chip.c2  { left: 3%;  top: 37%; animation-delay: -2s; }
        .hero-chip.c3  { left: 9%;  top: 54%; animation-delay: -4s; }
        .hero-chip.c4  { left: 4%;  top: 71%; animation-delay: -6s; }
        /* 右列 */
        .hero-chip.c5  { right: 5%; top: 18%; animation-delay: -1s; }
        .hero-chip.c6  { right: 3%; top: 35%; animation-delay: -3s; }
        .hero-chip.c7  { right: 9%; top: 52%; animation-delay: -5s; }
        .hero-chip.c8  { right: 4%; top: 69%; animation-delay: -7s; }
        /* 上带 */
        .hero-chip.c9  { left: 20%;  top: 12%; animation-delay: -1.5s; }
        .hero-chip.c10 { left: 37%;  top: 18%; animation-delay: -3.5s; }
        .hero-chip.c11 { right: 35%; top: 11%; animation-delay: -5.5s; }
        .hero-chip.c12 { right: 19%; top: 17%; animation-delay: -7.5s; }
        /* 下带 */
        .hero-chip.c13 { left: 22%;  top: 84%; animation-delay: -2.5s; }
        .hero-chip.c14 { left: 40%;  top: 89%; animation-delay: -4.5s; }
        .hero-chip.c15 { right: 38%; top: 85%; animation-delay: -6.5s; }
        .hero-chip.c16 { right: 20%; top: 80%; animation-delay: -8.5s; }
        /* 远景慢速漂浮 */
        .hero-chip.slow { animation-duration: 13s; }

        /* ========== 通用 Section ========== */
        .section { padding: 120px 24px; position: relative; }
        .section-inner { max-width: 1180px; margin: 0 auto; }
        .section-header { text-align: center; margin-bottom: 76px; }
        .section-tag {
            display: inline-block; padding: 6px 18px; border-radius: 100px; margin-bottom: 20px;
            background: rgba(129,140,248,0.09); border: 1px solid rgba(129,140,248,0.28);
            color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: 2px;
        }
        .section-header h2 { font-size: 42px; font-weight: 800; color: var(--text-1); margin-bottom: 18px; letter-spacing: 1px; }
        .section-header p { font-size: 17px; color: var(--text-3); max-width: 560px; margin: 0 auto; }
        /* 幽灵序号装饰 */
        .ghost-num {
            position: absolute; top: 48px; left: 50%; transform: translateX(-50%);
            font-size: 190px; font-weight: 900; line-height: 1; letter-spacing: 8px;
            color: transparent; -webkit-text-stroke: 1.5px rgba(129,140,248,0.09);
            pointer-events: none; user-select: none; z-index: 0;
        }
        .section-inner, .section-header { position: relative; z-index: 1; }

        /* ========== 统计数据 ========== */
        .stats { padding: 90px 24px; position: relative; background: var(--bg-1); }
        .stats::before, .stats::after {
            content: ''; position: absolute; left: 0; right: 0; height: 1px;
            background: linear-gradient(90deg, transparent, rgba(129,140,248,0.35), transparent);
        }
        .stats::before { top: 0; }
        .stats::after { bottom: 0; }
        .stats-grid { display: flex; justify-content: center; gap: 96px; flex-wrap: wrap; max-width: 1100px; margin: 0 auto; }
        .stat-item { text-align: center; position: relative; }
        .stat-item::before {
            content: ''; display: block; width: 34px; height: 3px; border-radius: 2px;
            background: var(--grad); margin: 0 auto 16px; opacity: 0.85;
        }
        .stat-number {
            font-size: 52px; font-weight: 800; letter-spacing: 1px;
            background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
        }
        .stat-label { font-size: 14px; color: var(--text-3); margin-top: 6px; letter-spacing: 1px; }

        /* ========== 服务卡片 ========== */
        .services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .service-card {
            position: relative; padding: 44px 34px; border-radius: 20px;
            background: var(--card); border: 1px solid var(--card-border);
            transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1); overflow: hidden;
        }
        .service-card::before {
            content: ''; position: absolute; inset: 0; border-radius: 20px;
            background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(129,140,248,0.14), transparent 45%);
            opacity: 0; transition: opacity 0.4s;
        }
        .service-card:hover { transform: translateY(-8px); border-color: var(--card-border-hover); box-shadow: 0 20px 50px rgba(0,0,0,0.35), 0 0 0 1px rgba(129,140,248,0.15); }
        .service-card.tilting { transition: transform 0.08s linear, box-shadow 0.4s, border-color 0.4s; will-change: transform; }
        .service-card:hover::before { opacity: 1; }
        .service-card > * { position: relative; z-index: 1; }
        .service-icon {
            width: 62px; height: 62px; border-radius: 16px; margin-bottom: 26px;
            display: flex; align-items: center; justify-content: center; font-size: 28px;
            transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        }
        .service-card:hover .service-icon { transform: scale(1.12) rotate(-6deg); }
        .service-icon svg { width: 30px; height: 30px; display: block; }
        .icon-blue   { background: linear-gradient(135deg, rgba(99,102,241,0.28), rgba(99,102,241,0.08)); box-shadow: 0 0 0 1px rgba(99,102,241,0.25); }
        .icon-green  { background: linear-gradient(135deg, rgba(52,211,153,0.24), rgba(52,211,153,0.06)); box-shadow: 0 0 0 1px rgba(52,211,153,0.22); }
        .icon-purple { background: linear-gradient(135deg, rgba(192,132,252,0.24), rgba(192,132,252,0.06)); box-shadow: 0 0 0 1px rgba(192,132,252,0.22); }
        .icon-orange { background: linear-gradient(135deg, rgba(251,146,60,0.22), rgba(251,146,60,0.05)); box-shadow: 0 0 0 1px rgba(251,146,60,0.2); }
        .icon-pink   { background: linear-gradient(135deg, rgba(244,114,182,0.22), rgba(244,114,182,0.05)); box-shadow: 0 0 0 1px rgba(244,114,182,0.2); }
        .icon-cyan   { background: linear-gradient(135deg, rgba(34,211,238,0.22), rgba(34,211,238,0.05)); box-shadow: 0 0 0 1px rgba(34,211,238,0.2); }
        .service-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 14px; color: var(--text-1); }
        .service-card p { font-size: 15px; color: var(--text-2); line-height: 1.8; }
        .service-card .card-arrow {
            display: inline-flex; align-items: center; gap: 6px; margin-top: 24px;
            font-size: 14px; font-weight: 600; color: var(--accent);
            opacity: 0; transform: translateX(-8px); transition: all 0.3s;
        }
        .service-card:hover .card-arrow { opacity: 1; transform: translateX(0); }

        /* ========== 关于我们 ========== */
        .about { background: var(--bg-1); }
        .about-content { display: flex; align-items: center; gap: 88px; }
        .about-visual { flex: 1; position: relative; }
        .about-card-main {
            border-radius: 24px; padding: 48px 40px; position: relative; overflow: hidden;
            background: linear-gradient(150deg, rgba(99,102,241,0.16), rgba(34,211,238,0.06) 60%, rgba(192,132,252,0.1));
            border: 1px solid rgba(129,140,248,0.3);
            backdrop-filter: blur(10px);
        }
        .about-card-main::before {
            content: ''; position: absolute; inset: 0;
            background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
                              linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
            background-size: 36px 36px;
        }
        /* 关于我们徽标（轨道环绕） */
        .about-emblem {
            position: relative; width: 150px; height: 150px; margin: 0 auto 34px;
            display: flex; align-items: center; justify-content: center;
        }
        .about-emblem .core {
            width: 88px; height: 88px; border-radius: 26px; background: var(--grad);
            display: flex; align-items: center; justify-content: center;
            font-size: 40px; font-weight: 900; color: #fff;
            box-shadow: 0 14px 48px rgba(99,102,241,0.55), inset 0 1px 0 rgba(255,255,255,0.35);
        }
        .about-emblem .ring {
            position: absolute; inset: 0; border-radius: 50%;
            border: 1.5px dashed rgba(129,140,248,0.4);
            animation: spin 20s linear infinite;
        }
        .about-emblem .ring.r2 {
            inset: -20px; border-color: rgba(34,211,238,0.22);
            animation-duration: 32s; animation-direction: reverse;
        }
        .about-emblem .sat {
            position: absolute; top: -5px; left: 50%; margin-left: -5px;
            width: 10px; height: 10px; border-radius: 50%;
            background: #22D3EE; box-shadow: 0 0 14px rgba(34,211,238,0.9);
        }
        @keyframes spin { to { transform: rotate(360deg); } }
        .about-mini-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; position: relative; }
        .about-mini-stat {
            background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
            border-radius: 14px; padding: 16px 18px;
        }
        .about-mini-stat .v { font-size: 22px; font-weight: 800; color: #fff; }
        .about-mini-stat .l { font-size: 12px; color: var(--text-2); margin-top: 2px; }
        .about-float-card {
            position: absolute; right: -20px; top: -28px; z-index: 2;
            background: rgba(10,14,39,0.85); border: 1px solid rgba(129,140,248,0.4);
            border-radius: 16px; padding: 16px 22px; backdrop-filter: blur(12px);
            display: flex; align-items: center; gap: 12px;
            box-shadow: 0 12px 40px rgba(0,0,0,0.4); animation: float 8s ease-in-out infinite;
        }
        .about-float-card .ic { font-size: 26px; }
        .about-float-card .t { font-size: 13px; color: var(--text-2); }
        .about-float-card .t b { display: block; color: #fff; font-size: 15px; }
        .about-text { flex: 1; }
        .about-text h2 { font-size: 40px; font-weight: 800; color: var(--text-1); margin-bottom: 22px; letter-spacing: 1px; }
        .about-text h2 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
        .about-text p { font-size: 16px; color: var(--text-2); line-height: 1.95; margin-bottom: 16px; }
        .about-features { margin-top: 32px; display: flex; flex-direction: column; gap: 14px; }
        .about-feature {
            display: flex; align-items: center; gap: 14px; padding: 14px 18px;
            background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
            border-radius: 12px; font-size: 15px; font-weight: 500; color: var(--text-1);
            transition: all 0.25s;
        }
        .about-feature:hover { background: rgba(129,140,248,0.08); border-color: rgba(129,140,248,0.3); transform: translateX(6px); }
        .about-feature .check {
            width: 26px; height: 26px; border-radius: 8px; flex-shrink: 0;
            background: linear-gradient(135deg, rgba(52,211,153,0.3), rgba(52,211,153,0.1));
            box-shadow: 0 0 0 1px rgba(52,211,153,0.3);
            display: flex; align-items: center; justify-content: center;
            color: #34D399; font-weight: 700; font-size: 13px;
        }

        /* ========== 技术栈 ========== */
        .tech-marquee-wrap { overflow: hidden; position: relative; padding: 8px 0; }
        .tech-marquee-wrap::before, .tech-marquee-wrap::after {
            content: ''; position: absolute; top: 0; bottom: 0; width: 140px; z-index: 2;
        }
        .tech-marquee-wrap::before { left: 0; background: linear-gradient(90deg, var(--bg-0), transparent); }
        .tech-marquee-wrap::after { right: 0; background: linear-gradient(-90deg, var(--bg-0), transparent); }
        .tech-marquee { display: flex; gap: 22px; width: max-content; animation: marquee 36s linear infinite; }
        .tech-marquee:hover { animation-play-state: paused; }
        .tech-marquee.row2 { animation: marquee-r 42s linear infinite; }
        @keyframes marquee { to { transform: translateX(-50%); } }
        @keyframes marquee-r { from { transform: translateX(-50%); } to { transform: translateX(0); } }
        .tech-item {
            display: flex; align-items: center; gap: 12px; white-space: nowrap;
            padding: 16px 32px; border-radius: 100px;
            background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.09);
            font-size: 15px; font-weight: 600; color: var(--text-2);
            transition: all 0.3s;
        }
        .tech-item:hover { border-color: rgba(129,140,248,0.5); color: #fff; background: rgba(129,140,248,0.1); box-shadow: 0 0 24px rgba(99,102,241,0.2); }
        .tech-item .tdot { width: 8px; height: 8px; border-radius: 50%; }

        /* ========== 合作伙伴 ========== */
        .partners { background: var(--bg-1); }
        .partners-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px; }
        .partner-logo {
            padding: 38px 20px; border-radius: 18px; text-align: center;
            background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.07);
            font-size: 17px; font-weight: 800; color: var(--text-3); letter-spacing: 3px;
            transition: all 0.35s; position: relative; overflow: hidden;
        }
        .partner-logo:hover { color: var(--text-1); border-color: rgba(129,140,248,0.4); background: rgba(129,140,248,0.08); transform: translateY(-5px); }
        .partner-logo::after {
            content: ''; position: absolute; top: 0; left: -80%; width: 40%; height: 100%;
            background: linear-gradient(100deg, transparent, rgba(255,255,255,0.08), transparent);
            transform: skewX(-20deg); transition: left 0.55s ease;
        }
        .partner-logo:hover::after { left: 140%; }
        .partner-logo .p-sub { display: block; font-size: 11px; font-weight: 500; letter-spacing: 2px; margin-top: 8px; opacity: 0.7; }

        /* ========== 联系我们 ========== */
        .contact-wrapper {
            max-width: 780px; margin: 0 auto; position: relative; border-radius: 26px;
            padding: 52px; background: rgba(255,255,255,0.03);
            border: 1px solid var(--card-border); backdrop-filter: blur(12px);
        }
        .contact-wrapper::before {
            content: ''; position: absolute; inset: -1px; border-radius: 26px; padding: 1px;
            background: linear-gradient(135deg, rgba(129,140,248,0.5), transparent 35%, transparent 65%, rgba(34,211,238,0.4));
            -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
            -webkit-mask-composite: xor; mask-composite: exclude;
            pointer-events: none;
        }
        .form-row { display: flex; gap: 18px; margin-bottom: 18px; }
        .form-group { flex: 1; display: flex; flex-direction: column; }
        .form-group label { font-size: 14px; font-weight: 600; color: var(--text-1); margin-bottom: 9px; letter-spacing: 0.5px; }
        .form-group input, .form-group textarea {
            padding: 15px 18px; border-radius: 12px; border: 1.5px solid rgba(255,255,255,0.1);
            font-size: 15px; font-family: inherit; color: var(--text-1);
            background: rgba(255,255,255,0.04); outline: none;
            transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
        }
        .form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-3); }
        .form-group input:focus, .form-group textarea:focus {
            border-color: rgba(129,140,248,0.7); background: rgba(129,140,248,0.06);
            box-shadow: 0 0 0 4px rgba(129,140,248,0.12);
        }
        .form-group textarea { resize: vertical; min-height: 130px; }
        .form-submit {
            width: 100%; padding: 17px; border-radius: 14px; font-size: 16px; font-weight: 700;
            background: var(--grad); color: #fff; border: none; cursor: pointer;
            transition: all 0.3s; margin-top: 10px; letter-spacing: 2px;
            box-shadow: 0 6px 24px rgba(99,102,241,0.35);
        }
        .form-submit:hover { transform: translateY(-2px); box-shadow: 0 12px 36px rgba(99,102,241,0.5); }

        /* ========== Footer ========== */
        .footer {
            background: var(--bg-1); color: var(--text-3); padding: 72px 24px 32px;
            border-top: 1px solid rgba(255,255,255,0.06); position: relative; overflow: hidden;
        }
        .footer::before {
            content: ''; position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
            width: 500px; height: 240px; border-radius: 50%;
            background: radial-gradient(ellipse, rgba(99,102,241,0.14), transparent 70%);
            pointer-events: none;
        }
        .footer-content {
            display: flex; justify-content: space-between; gap: 56px;
            max-width: 1180px; margin: 0 auto; flex-wrap: wrap; position: relative;
        }
        .footer-brand { max-width: 320px; }
        .footer-brand .footer-logo { font-size: 22px; font-weight: 800; color: var(--text-1); margin-bottom: 16px; letter-spacing: 2px; }
        .footer-brand .footer-logo span { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
        .footer-brand p { font-size: 14px; line-height: 1.9; }
        .footer-col h4 { font-size: 15px; font-weight: 700; color: var(--text-1); margin-bottom: 20px; letter-spacing: 1px; }
        .footer-col a { display: block; font-size: 14px; color: var(--text-3); margin-bottom: 12px; transition: all 0.2s; }
        .footer-col a:hover { color: var(--accent); transform: translateX(4px); }
        .footer-bottom {
            max-width: 1180px; margin: 52px auto 0; padding-top: 26px; position: relative;
            border-top: 1px solid rgba(255,255,255,0.07);
            display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 13px;
        }

        /* ========== 回到顶部按钮 ========== */
        .back-to-top {
            position: fixed; right: 30px; bottom: 30px; z-index: 900;
            width: 52px; height: 52px; border-radius: 50%; border: none; cursor: pointer;
            background: rgba(10,14,39,0.8); backdrop-filter: blur(12px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.4), 0 0 0 1px rgba(129,140,248,0.25);
            display: flex; align-items: center; justify-content: center;
            opacity: 0; transform: translateY(16px) scale(0.9); pointer-events: none;
            transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
        }
        .back-to-top.show { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
        .back-to-top:hover { box-shadow: 0 10px 34px rgba(99,102,241,0.4), 0 0 0 1px rgba(129,140,248,0.55); }
        .back-to-top svg { position: absolute; inset: 0; transform: rotate(-90deg); }
        .back-to-top .ring-track { stroke: rgba(255,255,255,0.08); }
        .back-to-top .ring-bar { stroke: url(#ringGrad); stroke-linecap: round; transition: stroke-dashoffset 0.1s linear; }
        .back-to-top .arrow { color: var(--accent); font-size: 18px; font-weight: 700; position: relative; }

        /* ========== Toast 提示 ========== */
        .toast {
            position: fixed; bottom: 40px; left: 50%; z-index: 2500;
            transform: translateX(-50%) translateY(24px); opacity: 0; pointer-events: none;
            padding: 15px 28px; border-radius: 100px; font-size: 15px; font-weight: 600;
            background: rgba(10,14,39,0.92); color: var(--text-1); backdrop-filter: blur(14px);
            border: 1px solid rgba(52,211,153,0.4); box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 24px rgba(52,211,153,0.12);
            display: flex; align-items: center; gap: 10px;
            transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
        }
        .toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
        .toast.error { border-color: rgba(248,113,113,0.5); box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 24px rgba(248,113,113,0.12); }
        .toast.error .tick { background: linear-gradient(135deg, #F87171, #EF4444); }
        .toast .tick {
            width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0;
            background: linear-gradient(135deg, #34D399, #10B981);
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 12px; font-weight: 800;
        }
        .form-submit.loading { opacity: 0.75; pointer-events: none; }
        .form-submit.success { background: linear-gradient(135deg, #34D399, #10B981); box-shadow: 0 6px 24px rgba(16,185,129,0.35); }

        /* ========== 响应式 ========== */
        @media (max-width: 1600px) {
            .hero-chip.c10, .hero-chip.c11, .hero-chip.c14, .hero-chip.c15 { display: none; }
        }
        @media (max-width: 1360px) {
            .hero-chip.c9, .hero-chip.c12, .hero-chip.c13, .hero-chip.c16 { display: none; }
        }
        @media (max-width: 1150px) {
            .hero-chip { display: none; }
        }
        @media (max-width: 1024px) {
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .partners-grid { grid-template-columns: repeat(3, 1fr); }
            .about-content { gap: 56px; }
        }
        @media (max-width: 820px) {
            .navbar { padding: 0 22px; }
            .nav-links, .nav-btn { display: none; }
            .menu-toggle { display: block; }
            .hero { padding: 130px 20px 90px; }
            .hero h1 { font-size: 40px; }
            .hero p { font-size: 16px; }
            .section { padding: 84px 20px; }
            .section-header h2 { font-size: 30px; }
            .stats { padding: 64px 20px; }
            .stats-grid { gap: 44px; }
            .stat-number { font-size: 40px; }
            .services-grid { grid-template-columns: 1fr; }
            .about-content { flex-direction: column; }
            .about-float-card { right: 8px; top: -22px; }
            .about-text h2 { font-size: 30px; }
            .partners-grid { grid-template-columns: repeat(2, 1fr); }
            .form-row { flex-direction: column; }
            .contact-wrapper { padding: 32px 24px; }
            .footer-content { flex-direction: column; gap: 40px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .ghost-num { font-size: 110px; top: 24px; }
            .back-to-top { right: 20px; bottom: 20px; width: 46px; height: 46px; }
        }

        /* ========== 滚动渐入动画 ========== */
        .fade-up { opacity: 0; transform: translateY(36px); transition: opacity 0.8s cubic-bezier(0.22,1,0.36,1), transform 0.8s cubic-bezier(0.22,1,0.36,1); }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { animation: none !important; transition: none !important; }
            .fade-up { opacity: 1; transform: none; }
        }