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

        html,
        body {

            height: 100%;
            width: 100%;
            font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: #0a0e14;
            color: #ffffff;
            overflow-x: hidden;
        }

        /* ============================================================
           顶部导航栏
           ============================================================ */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: #000000;
            height: 76px;
        }

        .header-inner {
            height: 100%;
            padding: 0 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 52px;
            height: 100%;
        }

        /* Logo（保留你的图标和名字） */
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            height: 100%;
        }

        .logo-icon {
            width: 34px;
            height: 34px;
            fill: #ffffff;
        }

        .logo-text {
            font-size: 19px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 3px;
        }

        /* 菜单 */
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 38px;
            height: 100%;
            position: relative;
        }

        .nav-item {
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 1.5px;
            height: 100%;
            display: flex;
            align-items: center;
            transition: color 0.25s ease;
            position: relative;
        }

        .nav-item:hover {
            color: #ffffff;
        }

        .nav-item.active {
            color: #ffffff;
            font-weight: 600;
        }

        /* 下划线跟随（保留你的交互） */
        .nav-underline {
            position: absolute;
            bottom: 20px;
            height: 2px;
            background: #ffffff;
            transition: all 0.3s ease;
            border-radius: 1px;
        }

        /* ============================================================
           右侧图标
           ============================================================ */
        .header-right {
            display: flex;
            align-items: center;
            gap: 32px;
            height: 100%;
            position: relative;
        }

        .icon-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            cursor: pointer;
            border-radius: 50%;
            transition: all 0.25s ease;
            background: transparent;
            border: none;
            position: relative;
        }

        .icon-btn:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }

        .icon-btn i {
            font-size: 20px;
            line-height: 1;
        }

        /* ============================================================
           主视觉（全屏）
           ============================================================ */
        .main-content {
            padding-top: 0;
            min-height: 100vh;
        }

        /* ============================================================
   主视觉（全屏）—— 图片背景版
   ============================================================ */
        .hero-section {
            position: relative;
            width: 100%;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 20px 80px;
            overflow: hidden;

            /* 背景图片 */
            background-image: url('/Folder/Picture/kv-full_3f817e35.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            background-color: #0a0e14;
            /* 图片加载失败时的兜底色 */
        }

        /* 深色遮罩 + 氛围光（叠在图片上，让文字清晰） */
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background:
                /* 深色遮罩，让白色文字能压住图片 */
                linear-gradient(to bottom,
                    rgba(9, 10, 15, 0.75) 0%,
                    rgba(9, 10, 15, 0.55) 40%,
                    rgba(9, 10, 15, 0.75) 100%),
                /* 原有的四层氛围光 */
                radial-gradient(ellipse 1100px 600px at 50% 40%, rgba(0, 170, 255, 0.20), transparent 70%),
                radial-gradient(ellipse 700px 400px at 50% 100%, rgba(0, 120, 200, 0.25), transparent 70%),
                radial-gradient(ellipse 800px 500px at 15% 80%, rgba(80, 60, 180, 0.15), transparent 70%),
                radial-gradient(ellipse 800px 500px at 85% 80%, rgba(0, 140, 180, 0.15), transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        /* 小字（"GLOBAL RELEASE"） */
        .hero-sub {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 14px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 26px;
            padding-left: 14px;
        }

        /* 大字 */
        .hero-title {
            font-size: 84px;
            font-weight: 900;
            letter-spacing: 6px;
            color: #ffffff;
            line-height: 1.1;
            margin-bottom: 50px;
            text-shadow: 0 4px 40px rgba(0, 0, 0, 0.6);
        }

        /* 蓝色大按钮 */
        .hero-btn {
            display: inline-block;
            padding: 18px 76px;
            font-size: 20px;
            font-weight: 600;
            letter-spacing: 4px;
            color: #fff;
            background: #00a8e8;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            text-decoration: none;
            box-shadow: 0 8px 28px rgba(0, 168, 232, 0.5);
            transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        .hero-btn:hover {
            background: #00c8ff;
            transform: translateY(-2px);
            box-shadow: 0 14px 38px rgba(0, 200, 255, 0.65);
        }

        .hero-btn:active {
            transform: translateY(0);
        }

        /* ============================================================
           右下角"意见反馈"
           ============================================================ */
        .feedback-btn {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 900;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: #ffffff;
            border: none;
            border-radius: 6px;
            color: #000000;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            cursor: pointer;
            text-decoration: none;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            transition: all 0.25s ease;
        }

        .feedback-btn:hover {
            background: #f5f5f5;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
        }

        .feedback-btn svg {
            fill: currentColor;
        }

        /* ============================================================
           登录弹窗（照旧保留）
           ============================================================ */
        .login-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.75);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            z-index: 2000;
            justify-content: center;
            align-items: center;
        }

        .login-container {
            background: #0f141c;
            border: 1px solid rgba(0, 170, 255, 0.25);
            border-radius: 12px;
            width: 400px;
            max-width: 90%;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 40px rgba(0, 170, 255, 0.15);
            overflow: hidden;
            color: #fff;
        }

        .login-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .login-header h2 {
            margin: 0;
            font-size: 18px;
            color: #fff;
            letter-spacing: 2px;
        }

        .close-btn {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: rgba(255, 255, 255, 0.5);
            transition: color 0.3s;
        }

        .close-btn:hover {
            color: #00c8ff;
        }

        .login-form {
            padding: 24px;
        }

        .login-form .form-group {
            margin-bottom: 20px;
        }

        .login-form label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
        }

        .login-form input {
            width: 100%;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 6px;
            font-size: 14px;
            color: #fff;
            transition: all 0.3s;
            box-sizing: border-box;
            outline: none;
        }

        .login-form input:focus {
            border-color: #00c8ff;
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
        }

        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
            font-size: 13px;
        }

        .remember-me {
            display: flex;
            align-items: center;
            cursor: pointer;
            color: rgba(255, 255, 255, 0.7);
        }

        .remember-me input {
            margin-right: 8px;
            width: auto;
        }

        .forgot-password {
            color: #00c8ff;
            text-decoration: none;
        }

        .login-btn {
            width: 100%;
            padding: 12px;
            background: #00a8e8;
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 2px;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 15px rgba(0, 168, 232, 0.4);
        }

        .login-btn:hover {
            background: #00c8ff;
            box-shadow: 0 6px 22px rgba(0, 200, 255, 0.55);
        }

        .register-link {
            margin-top: 16px;
            text-align: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
        }

        .register-link a {
            color: #00c8ff;
            text-decoration: none;
        }

        .error-message {
            color: #ff4d6a;
            font-size: 13px;
            margin-top: 8px;
            display: none;
        }

        /* 通知提示 */
        .notification {
            position: fixed;
            top: 100px;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(0, 168, 232, 0.95);
            color: #fff;
            padding: 12px 28px;
            border-radius: 6px;
            z-index: 3000;
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 14px;
            letter-spacing: 1px;
            box-shadow: 0 8px 24px rgba(0, 168, 232, 0.4);
        }

        .notification.show {
            opacity: 1;
        }

        /* 用户菜单 */
        .user-menu {
            position: absolute;
            top: calc(100% - 4px);
            right: 0;
            width: 160px;
            background: #0f141c;
            border: 1px solid rgba(0, 170, 255, 0.2);
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
            z-index: 1001;
            display: none;
            overflow: hidden;
        }

        .user-menu-item {
            padding: 11px 16px;
            cursor: pointer;
            color: rgba(255, 255, 255, 0.75);
            font-size: 13.5px;
            transition: all 0.2s;
        }

        .user-menu-item:hover {
            background: rgba(0, 170, 255, 0.12);
            color: #00c8ff;
        }

        .user-menu-divider {
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            margin: 4px 0;
        }

        /* ============================================================
           滚动条
           ============================================================ */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: transparent;
        }

        ::-webkit-scrollbar-thumb {
            background: rgba(0, 170, 255, 0.25);
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 170, 255, 0.45);
        }

        /* ============================================================
           响应式
           ============================================================ */
        @media (max-width: 1100px) {
            .header-inner {
                padding: 0 32px;
            }

            .header-left {
                gap: 32px;
            }

            .nav-menu {
                gap: 26px;
            }

            .nav-item {
                font-size: 14px;
            }
        }

        @media (max-width: 900px) {
            .header {
                height: 64px;
            }

            .header-inner {
                padding: 0 20px;
            }

            .header-left {
                gap: 20px;
            }

            .nav-menu {
                gap: 16px;
            }

            .nav-item {
                font-size: 13px;
                letter-spacing: 0.5px;
            }

            .logo-text {
                font-size: 16px;
            }

            .hero-title {
                font-size: 52px;
                letter-spacing: 3px;
            }

            .hero-sub {
                font-size: 11px;
                letter-spacing: 8px;
            }

            .hero-btn {
                padding: 15px 48px;
                font-size: 16px;
                letter-spacing: 2px;
            }
        }

        @media (max-width: 640px) {
            .nav-menu {
                display: none;
            }

            .header-right {
                gap: 16px;
            }

            .hero-title {
                font-size: 36px;
            }

            .feedback-btn {
                right: 12px;
                bottom: 12px;
                padding: 8px 14px;
                font-size: 12px;
            }
        }

        /* 登录后的字母头像 */
        .user-avatar {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: linear-gradient(135deg, #4a9eff, #2193b0);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            box-shadow: 0 0 8px rgba(74, 158, 255, 0.5);
            transition: transform 0.2s;
        }

        .user-avatar:hover {
            transform: scale(1.08);
        }