/* roulang page: index */
/* ============ 设计变量 ============ */
        :root {
            --color-bg: #0A0E17;
            --color-bg-deep: #070A10;
            --color-primary: #00FFAA;
            --color-primary-dark: #00CC88;
            --color-primary-glow: rgba(0, 255, 170, 0.35);
            --color-accent: #FF3366;
            --color-accent-glow: rgba(255, 51, 102, 0.4);
            --color-card: #1A1F2E;
            --color-card-hover: #252B38;
            --color-border: #2B3040;
            --color-text: #F0F0F0;
            --color-text-secondary: #BBB;
            --color-text-muted: #8A91A5;
            --color-text-dark: #0A0E17;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.5);
            --shadow-hover: 0 8px 28px rgba(0, 0, 0, 0.7), 0 0 20px var(--color-primary-glow);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container: 1200px;
            --nav-height: 64px;
            --section-gap: 80px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            font-size: 16px;
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:hover {
            color: var(--color-primary-dark);
        }

        ul, ol {
            list-style: none;
        }

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

        input, textarea, select {
            font-family: inherit;
            font-size: inherit;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
        }

        h1 {
            font-size: 3rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.25rem;
        }

        /* ============ 容器 ============ */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ 导航 ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            height: var(--nav-height);
            border-bottom: 1px solid rgba(43, 48, 64, 0.6);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
            border-bottom-color: rgba(0, 255, 170, 0.2);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
        }

        .nav-group {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-group.left {
            justify-content: flex-start;
            padding-right: 16px;
        }

        .nav-group.right {
            justify-content: flex-end;
            padding-left: 16px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-secondary);
            position: relative;
            padding: 6px 0;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-primary);
            border-radius: 1px;
            transition: width 0.3s ease;
            box-shadow: 0 0 8px var(--color-primary-glow);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .nav-link:hover {
            color: var(--color-text);
        }
        .nav-link.active {
            color: var(--color-primary);
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-text-dark);
            box-shadow: 0 0 16px var(--color-primary-glow);
            flex-shrink: 0;
        }

        .nav-logo .logo-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
        }
        .nav-logo .logo-text .highlight {
            color: var(--color-primary);
        }

        /* 汉堡菜单按钮 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 32px;
            height: 32px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 1002;
            position: relative;
        }

        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: var(--transition);
            transform-origin: center;
        }

        .hamburger.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
            background: var(--color-primary);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
            background: var(--color-primary);
        }

        /* ============ Hero ============ */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 120px 24px 80px;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 23, 0.7) 0%, rgba(10, 14, 23, 0.85) 60%, rgba(10, 14, 23, 0.95) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 255, 170, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 255, 170, 0.04) 1px, transparent 1px);
            background-size: 48px 48px;
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-primary);
            background: rgba(0, 255, 170, 0.1);
            border: 1px solid rgba(0, 255, 170, 0.3);
            border-radius: 50px;
            padding: 8px 18px;
            margin-bottom: 28px;
            letter-spacing: 0.05em;
        }

        .hero-tag .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-primary);
            box-shadow: 0 0 8px var(--color-primary-glow);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
        }

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 20px;
            text-shadow: 0 0 20px rgba(0, 255, 170, 0.5), 0 0 40px rgba(0, 255, 170, 0.2);
            line-height: 1.25;
        }

        .hero h1 .neon {
            color: var(--color-primary);
        }

        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 720px;
            margin: 0 auto 36px;
            line-height: 1.8;
            letter-spacing: 0.01em;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            letter-spacing: 0.02em;
            position: relative;
            overflow: hidden;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: var(--color-text-dark);
            box-shadow: 0 4px 16px var(--color-primary-glow);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #1affbb, #00e099);
            box-shadow: 0 6px 24px var(--color-primary-glow), 0 0 30px rgba(0, 255, 170, 0.3);
            transform: translateY(-2px);
            color: var(--color-text-dark);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px var(--color-primary-glow);
        }

        .btn-secondary {
            background: transparent;
            border: 1px solid var(--color-primary);
            color: var(--color-primary);
        }

        .btn-secondary:hover {
            background: rgba(0, 255, 170, 0.13);
            color: var(--color-primary);
            box-shadow: 0 0 20px rgba(0, 255, 170, 0.2);
            transform: translateY(-2px);
        }

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

        .hero-stats {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
        }

        .hero-stat-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--color-primary);
            text-shadow: 0 0 16px var(--color-primary-glow);
            letter-spacing: -0.01em;
        }

        .hero-stat-label {
            font-size: 12px;
            color: var(--color-text-muted);
            font-weight: 500;
            letter-spacing: 0.05em;
        }

        /* ============ 保障图标条 ============ */
        .trust-bar {
            padding: 40px 0;
            border-bottom: 1px solid rgba(43, 48, 64, 0.5);
            background: rgba(10, 14, 23, 0.8);
        }

        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            align-items: start;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 12px 8px;
        }

        .trust-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: rgba(0, 255, 170, 0.08);
            border: 1px solid rgba(0, 255, 170, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 20px;
            color: var(--color-primary);
            transition: var(--transition);
        }

        .trust-item:hover .trust-icon {
            background: rgba(0, 255, 170, 0.15);
            box-shadow: 0 0 20px rgba(0, 255, 170, 0.2);
        }

        .trust-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 2px;
        }

        .trust-info p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.4;
        }

        /* ============ 核心板块 ============ */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-header p {
            font-size: 15px;
            color: var(--color-text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        /* 非对称卡片组 */
        .board-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
            grid-template-areas:
                "wide card1 card2"
                "wide card3 card4";
        }

        .board-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition);
            cursor: pointer;
            position: relative;
            overflow: hidden;
            min-height: 180px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }

        .board-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at top right, rgba(0, 255, 170, 0.06), transparent 60%);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }

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

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

        .board-card.wide {
            grid-area: wide;
            min-height: 380px;
            padding: 36px;
            background: linear-gradient(160deg, var(--color-card) 0%, rgba(10, 14, 23, 0.9) 100%);
            border-color: rgba(0, 255, 170, 0.25);
        }

        .board-card:nth-child(2) { grid-area: card1; }
        .board-card:nth-child(3) { grid-area: card2; }
        .board-card:nth-child(4) { grid-area: card3; }
        .board-card:nth-child(5) { grid-area: card4; }

        .board-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 255, 170, 0.1);
            border: 1px solid rgba(0, 255, 170, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-primary);
            margin-bottom: 16px;
            transition: var(--transition);
        }

        .board-card.wide .board-icon {
            width: 56px;
            height: 56px;
            font-size: 24px;
            border-radius: var(--radius-md);
        }

        .board-card:hover .board-icon {
            box-shadow: 0 0 20px rgba(0, 255, 170, 0.3);
            background: rgba(0, 255, 170, 0.18);
        }

        .board-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .board-card.wide h3 {
            font-size: 1.5rem;
        }

        .board-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        .board-link {
            font-size: 13px;
            color: var(--color-primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
            opacity: 0.8;
            transition: var(--transition);
        }

        .board-card:hover .board-link {
            opacity: 1;
            gap: 10px;
        }

        /* ============ 优势数据 ============ */
        .stats-section {
            background: linear-gradient(180deg, rgba(10, 14, 23, 0.6) 0%, rgba(10, 14, 23, 0.9) 100%);
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 255, 170, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 255, 170, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .stat-block {
            padding: 24px 16px;
        }

        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--color-primary);
            text-shadow: 0 0 24px var(--color-primary-glow), 0 0 50px rgba(0, 255, 170, 0.15);
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
        }

        .stat-number .suffix {
            font-size: 2rem;
            margin-left: 2px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
            letter-spacing: 0.04em;
        }

        .stat-divider {
            width: 48px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
            margin: 12px auto 0;
            border-radius: 1px;
            opacity: 0.5;
        }

        /* ============ 热门帖子 ============ */
        .posts-scroll-wrap {
            position: relative;
            overflow: hidden;
        }

        .posts-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding: 8px 4px 20px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: rgba(0, 255, 170, 0.3) transparent;
        }

        .posts-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .posts-scroll::-webkit-scrollbar-track {
            background: rgba(43, 48, 64, 0.3);
            border-radius: 3px;
        }
        .posts-scroll::-webkit-scrollbar-thumb {
            background: rgba(0, 255, 170, 0.3);
            border-radius: 3px;
        }

        .post-card {
            flex: 0 0 280px;
            scroll-snap-align: start;
            background: rgba(26, 31, 46, 0.85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            position: relative;
            min-height: 200px;
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            background: rgba(37, 43, 56, 0.9);
        }

        .post-card-img {
            height: 150px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            flex-shrink: 0;
        }

        .post-card-img .post-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            letter-spacing: 0.05em;
            z-index: 2;
        }

        .post-badge.hot {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 0 12px var(--color-accent-glow);
        }
        .post-badge.new {
            background: var(--color-primary);
            color: var(--color-text-dark);
            box-shadow: 0 0 12px rgba(0, 255, 170, 0.3);
        }
        .post-badge.essence {
            background: #FFB800;
            color: #1a1a1a;
            box-shadow: 0 0 12px rgba(255, 184, 0, 0.3);
        }

        .post-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-card-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--color-text-muted);
            margin-top: auto;
            padding-top: 8px;
        }

        .post-meta .post-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ============ 会员方案 ============ */
        .membership-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }

        .membership-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .membership-card:hover {
            transform: translateY(-5px);
            border-color: var(--color-border);
            box-shadow: var(--shadow-hover);
        }

        .membership-card.featured {
            border-color: var(--color-primary);
            box-shadow: 0 0 32px rgba(0, 255, 170, 0.15), 0 8px 24px rgba(0, 0, 0, 0.5);
            background: linear-gradient(160deg, rgba(0, 255, 170, 0.06) 0%, var(--color-card) 40%);
        }

        .membership-card.premium {
            border-color: var(--color-accent);
            box-shadow: 0 0 32px rgba(255, 51, 102, 0.12), 0 8px 24px rgba(0, 0, 0, 0.5);
            background: linear-gradient(160deg, rgba(255, 51, 102, 0.06) 0%, var(--color-card) 40%);
        }

        .membership-card .plan-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 50px;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
            align-self: flex-start;
        }

        .plan-badge.standard {
            background: rgba(138, 145, 165, 0.2);
            color: var(--color-text-secondary);
            border: 1px solid rgba(138, 145, 165, 0.4);
        }

        .plan-badge.vip {
            background: rgba(0, 255, 170, 0.15);
            color: var(--color-primary);
            border: 1px solid rgba(0, 255, 170, 0.4);
        }

        .plan-badge.premium-badge {
            background: rgba(255, 51, 102, 0.15);
            color: var(--color-accent);
            border: 1px solid rgba(255, 51, 102, 0.4);
        }

        .membership-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .membership-card .plan-price {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }

        .membership-card .plan-price strong {
            font-size: 1.8rem;
            color: var(--color-text);
            font-weight: 800;
        }

        .membership-card.featured .plan-price strong {
            color: var(--color-primary);
        }
        .membership-card.premium .plan-price strong {
            color: var(--color-accent);
        }

        .plan-features {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            flex: 1;
        }

        .plan-features li {
            font-size: 14px;
            color: var(--color-text-secondary);
            padding: 7px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid rgba(43, 48, 64, 0.4);
        }

        .plan-features li:last-child {
            border-bottom: none;
        }

        .plan-features li .check {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: rgba(0, 255, 170, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .plan-features li.locked {
            color: var(--color-text-muted);
            opacity: 0.6;
        }
        .plan-features li.locked .check {
            background: rgba(138, 145, 165, 0.15);
            color: var(--color-text-muted);
        }

        .btn-plan {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            width: 100%;
        }

        .btn-plan-standard {
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
            background: transparent;
        }
        .btn-plan-standard:hover {
            border-color: var(--color-text-secondary);
            color: var(--color-text);
            background: rgba(240, 240, 240, 0.05);
        }

        .btn-plan-vip {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            color: var(--color-text-dark);
            box-shadow: 0 4px 16px var(--color-primary-glow);
        }
        .btn-plan-vip:hover {
            box-shadow: 0 6px 24px var(--color-primary-glow), 0 0 30px rgba(0, 255, 170, 0.3);
            transform: translateY(-2px);
            color: var(--color-text-dark);
        }

        .btn-plan-premium {
            background: linear-gradient(135deg, var(--color-accent), #d42a50);
            color: #fff;
            box-shadow: 0 4px 16px var(--color-accent-glow);
        }
        .btn-plan-premium:hover {
            box-shadow: 0 6px 24px var(--color-accent-glow), 0 0 30px rgba(255, 51, 102, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ============ FAQ ============ */
        .faq-section {
            background: rgba(10, 14, 23, 0.5);
            border-top: 1px solid rgba(43, 48, 64, 0.3);
            border-bottom: 1px solid rgba(43, 48, 64, 0.3);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(0, 255, 170, 0.3);
        }

        .faq-item.open {
            background: var(--color-card-hover);
            border-color: rgba(0, 255, 170, 0.4);
            box-shadow: 0 0 16px rgba(0, 255, 170, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            transition: var(--transition);
            text-align: left;
            width: 100%;
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 255, 170, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--color-primary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: rgba(0, 255, 170, 0.2);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--color-bg-deep);
            padding: 56px 0 24px;
            border-top: 2px solid var(--color-primary);
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-primary), var(--color-accent), var(--color-primary), transparent);
            background-size: 200% 100%;
            animation: footer-line 4s linear infinite;
        }

        @keyframes footer-line {
            0% { background-position: 0% 0; }
            100% { background-position: 200% 0; }
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 36px;
        }

        .footer-brand .nav-logo {
            margin-bottom: 16px;
        }

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

        .footer-brand p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-contact h4,
        .footer-links h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: 0.05em;
        }

        .footer-contact ul li {
            font-size: 13px;
            color: var(--color-text-muted);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact ul li i {
            color: var(--color-primary);
            width: 16px;
            text-align: center;
        }

        .footer-links ul li {
            padding: 5px 0;
        }

        .footer-links ul li a {
            font-size: 13px;
            color: var(--color-text-muted);
            transition: var(--transition);
        }
        .footer-links ul li a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(43, 48, 64, 0.5);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--color-text-muted);
            letter-spacing: 0.02em;
        }

        .footer-bottom .disclaimer {
            font-size: 11px;
            color: rgba(138, 145, 165, 0.7);
            max-width: 500px;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 56px;
            }

            h1 { font-size: 2.6rem; }

            .hero h1 { font-size: 2.6rem; }

            .board-grid {
                grid-template-columns: 1.2fr 1fr;
                grid-template-areas:
                    "wide card1"
                    "wide card2"
                    "card3 card4";
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-number {
                font-size: 2.8rem;
            }

            .membership-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .membership-card.premium {
                grid-column: 1 / -1;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 40px;
                --nav-height: 56px;
            }

            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }

            .nav-wrapper {
                flex-wrap: nowrap;
            }

            .nav-group {
                display: none;
            }

            .nav-logo {
                font-size: 15px;
            }
            .nav-logo .logo-text {
                font-size: 15px;
            }
            .nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }

            .hamburger {
                display: flex;
                position: absolute;
                right: 20px;
                top: 50%;
                transform: translateY(-50%);
            }

            .nav-wrapper {
                justify-content: center;
                padding: 0 60px 0 16px;
            }

            /* 移动端全屏菜单 */
            .mobile-menu {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(10, 14, 23, 0.97);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                z-index: 1001;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 24px;
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.35s ease;
            }

            .mobile-menu.open {
                opacity: 1;
                pointer-events: auto;
            }

            .mobile-menu .nav-link {
                font-size: 20px;
                font-weight: 600;
                color: var(--color-text);
                padding: 10px 0;
            }
            .mobile-menu .nav-link:hover,
            .mobile-menu .nav-link.active {
                color: var(--color-primary);
            }

            .hero {
                min-height: 100vh;
                padding: 100px 20px 60px;
            }

            .hero h1 {
                font-size: 2rem;
                line-height: 1.3;
            }

            .hero-subtitle {
                font-size: 0.95rem;
                line-height: 1.7;
            }

            .hero-cta-group {
                flex-direction: column;
                gap: 12px;
                width: 100%;
                max-width: 320px;
                margin-left: auto;
                margin-right: auto;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }

            .hero-stats {
                gap: 20px;
            }
            .hero-stat-value {
                font-size: 1.3rem;
            }

            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .trust-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                text-align: left;
            }

            .board-grid {
                grid-template-columns: 1fr;
                grid-template-areas:
                    "wide"
                    "card1"
                    "card2"
                    "card3"
                    "card4";
                gap: 16px;
            }
            .board-card.wide {
                min-height: 240px;
                padding: 24px;
            }
            .board-card {
                min-height: 150px;
                padding: 20px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .stat-number .suffix {
                font-size: 1.3rem;
            }

            .post-card {
                flex: 0 0 240px;
            }
            .post-card-img {
                height: 120px;
            }

            .membership-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .membership-card.premium {
                grid-column: auto;
            }
            .membership-card {
                padding: 24px 20px;
            }

            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer p {
                font-size: 13px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-subtitle {
                font-size: 0.85rem;
            }
            .hero-stat-value {
                font-size: 1.1rem;
            }
            .hero-stat-label {
                font-size: 11px;
            }

            .trust-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .trust-item {
                flex-direction: row;
                align-items: center;
                text-align: left;
                gap: 14px;
            }

            .section-header h2 {
                font-size: 1.4rem;
            }
            .section-header p {
                font-size: 13px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-number {
                font-size: 1.8rem;
            }

            .post-card {
                flex: 0 0 220px;
            }
            .post-card-img {
                height: 100px;
            }
            .post-card-body h3 {
                font-size: 13px;
            }

            .faq-question {
                font-size: 13px;
                padding: 12px 14px;
            }
        }