/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --bg-primary: #1E1E1E;
            --bg-card: #282828;
            --bg-card-alt: #2A2A2A;
            --bg-input: #333333;
            --color-accent: #C8A24C;
            --color-accent-hover: #D4B05E;
            --color-accent-glow: rgba(200, 162, 76, 0.45);
            --color-neon: #00D4FF;
            --color-neon-glow: rgba(0, 212, 255, 0.35);
            --color-secondary-bg: #2C2E3A;
            --text-primary: #FFFFFF;
            --text-body: #E0E0E0;
            --text-muted: #B0B0B0;
            --text-dim: #888888;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --border-input: #555555;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.55);
            --shadow-glow: 0 0 20px rgba(200, 162, 76, 0.3);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-full: 50%;
            --transition-fast: 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
            --transition-smooth: 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
            --transition-slow: 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
            --font-family-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-family-en: 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
            --nav-height: 64px;
            --container-max: 1200px;
            --section-padding: 80px;
            --section-padding-mobile: 60px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family-cn);
            background-color: var(--bg-primary);
            color: var(--text-body);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

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

        h1 {
            font-size: 36px;
            line-height: 48px;
            letter-spacing: -0.5px;
        }

        h2 {
            font-size: 28px;
            line-height: 36px;
        }

        h3 {
            font-size: 20px;
            line-height: 28px;
            font-weight: 600;
        }

        p {
            font-size: 15px;
            line-height: 24px;
        }

        /* ========== 容器 ========== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        .container--narrow {
            max-width: 900px;
        }

        /* ========== 导航 ========== */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(30, 30, 30, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth);
        }

        .nav__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent);
            white-space: nowrap;
            letter-spacing: 0.03em;
            flex-shrink: 0;
        }

        .nav__logo-icon {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
        }

        .nav__logo-icon svg {
            width: 100%;
            height: 100%;
        }

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

        .nav__link {
            font-size: 14px;
            color: var(--text-muted);
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-smooth);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .nav__link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            transition: width var(--transition-smooth), left var(--transition-smooth);
            border-radius: 1px;
        }

        .nav__link:hover {
            color: var(--text-primary);
        }

        .nav__link:hover::after {
            width: 100%;
            left: 0;
        }

        .nav__link--active {
            color: var(--text-primary);
        }

        .nav__link--active::after {
            width: 100%;
            left: 0;
        }

        .nav__cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border: 1.5px solid var(--color-accent);
            border-radius: var(--radius-xs);
            color: var(--text-primary);
            font-size: 13px;
            font-weight: 600;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            letter-spacing: 0.03em;
        }

        .nav__cta:hover {
            background: var(--color-accent);
            color: #1A1A1A;
            box-shadow: var(--shadow-glow);
        }

        .nav__hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 28px;
            height: 20px;
            justify-content: center;
            cursor: pointer;
            z-index: 1001;
        }

        .nav__hamburger span {
            display: block;
            height: 2px;
            background: var(--text-primary);
            border-radius: 1px;
            transition: all var(--transition-smooth);
        }

        .nav__hamburger--open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav__hamburger--open span:nth-child(2) {
            opacity: 0;
        }

        .nav__hamburger--open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .nav__mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(20, 20, 20, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 24px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }

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

        .nav__mobile-link {
            font-size: 18px;
            color: var(--text-primary);
            padding: 8px 20px;
            letter-spacing: 0.04em;
            transition: color var(--transition-smooth);
        }

        .nav__mobile-link:hover {
            color: var(--color-accent);
        }

        .nav__mobile-close {
            position: absolute;
            top: 20px;
            right: 20px;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--text-primary);
            cursor: pointer;
            transition: background var(--transition-smooth);
        }

        .nav__mobile-close:hover {
            background: rgba(255, 255, 255, 0.18);
        }

        /* ========== Hero ========== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding-top: var(--nav-height);
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            background-attachment: fixed;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 1;
        }

        .hero__content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 60px 0;
        }

        .hero__grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .hero__text {
            max-width: 560px;
        }

        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(200, 162, 76, 0.15);
            border: 1px solid rgba(200, 162, 76, 0.35);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 13px;
            color: var(--color-accent);
            margin-bottom: 20px;
            letter-spacing: 0.04em;
            font-weight: 500;
        }

        .hero__badge-dot {
            width: 7px;
            height: 7px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 6px var(--color-accent-glow);
            }
            50% {
                opacity: 0.5;
                box-shadow: 0 0 12px var(--color-accent-glow);
            }
        }

        .hero__title {
            font-size: 38px;
            line-height: 50px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            position: relative;
            padding-left: 18px;
            letter-spacing: -0.3px;
        }

        .hero__title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            width: 4px;
            height: 60px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .hero__subtitle {
            font-size: 16px;
            line-height: 26px;
            color: var(--text-body);
            margin-bottom: 24px;
            max-width: 480px;
        }

        .hero__actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero__card-panel {
            background: rgba(40, 40, 40, 0.75);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .hero__card-panel h3 {
            font-size: 18px;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .hero__card-panel p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 22px;
        }

        .hero__badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .hero__badge-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: rgba(200, 162, 76, 0.1);
            border: 1px solid rgba(200, 162, 76, 0.2);
            border-radius: var(--radius-sm);
            padding: 6px 12px;
            font-size: 12px;
            color: var(--color-accent);
            white-space: nowrap;
            font-weight: 500;
        }

        .hero__badge-item svg {
            width: 14px;
            height: 14px;
            flex-shrink: 0;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-xs);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
            white-space: nowrap;
            cursor: pointer;
            border: none;
        }

        .btn--primary {
            background: var(--color-accent);
            color: #1A1A1A;
            box-shadow: 0 2px 10px rgba(200, 162, 76, 0.25);
        }

        .btn--primary:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 0 20px var(--color-accent-glow);
            transform: translateY(-1px);
        }

        .btn--outline {
            background: transparent;
            border: 1.5px solid var(--color-accent);
            color: var(--text-primary);
        }

        .btn--outline:hover {
            background: var(--color-accent);
            color: #1A1A1A;
            box-shadow: var(--shadow-glow);
        }

        .btn--lg {
            padding: 14px 34px;
            font-size: 16px;
        }

        .btn--sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .btn--full {
            width: 100%;
            justify-content: center;
        }

        .btn--neon {
            border-color: var(--color-neon);
            color: var(--color-neon);
        }

        .btn--neon:hover {
            background: var(--color-neon);
            color: #0D1B1F;
            box-shadow: 0 0 18px var(--color-neon-glow);
        }

        .btn__arrow {
            transition: transform var(--transition-smooth);
            display: inline-flex;
        }

        .btn:hover .btn__arrow {
            transform: translateX(3px);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: var(--section-padding) 0;
        }

        .section--dark {
            background: var(--bg-card-alt);
        }

        .section--darker {
            background: #1A1A1A;
        }

        .section--grid-bg {
            background: var(--bg-primary);
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .section__header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section__header--left {
            text-align: left;
        }

        .section__label {
            display: inline-block;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--color-accent);
            margin-bottom: 10px;
            font-weight: 600;
        }

        .section__title {
            font-size: 28px;
            line-height: 36px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .section__desc {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 24px;
        }

        .section__divider {
            width: 48px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
            margin: 16px auto 0;
        }

        /* ========== 痛点演示 ========== */
        .pain-points {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .pain-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .pain-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--color-accent), transparent);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

        .pain-card:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

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

        .pain-card__icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(200, 162, 76, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
            font-size: 20px;
            color: var(--color-accent);
        }

        .pain-card__title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .pain-card__desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 20px;
        }

        /* ========== 步骤三连 ========== */
        .steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            position: relative;
            transition: all var(--transition-smooth);
            counter-increment: step;
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--border-light);
        }

        .step-card__number {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            color: #1A1A1A;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-family: var(--font-family-en);
        }

        .step-card__title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .step-card__desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 22px;
        }

        .step-card__arrow {
            display: none;
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-accent);
            font-size: 24px;
        }

        /* ========== 资讯区 ========== */
        .news-layout {
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 28px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .news-item:hover {
            padding-left: 8px;
            border-bottom-color: var(--border-light);
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item__dot {
            width: 8px;
            height: 8px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
            flex-shrink: 0;
            margin-top: 7px;
        }

        .news-item__content {
            flex: 1;
            min-width: 0;
        }

        .news-item__title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-item__meta {
            font-size: 12px;
            color: var(--text-dim);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-sidebar__title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-subtle);
        }

        .news-sidebar__item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .news-sidebar__item:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .news-sidebar__rank {
            width: 26px;
            height: 26px;
            border-radius: var(--radius-xs);
            background: rgba(200, 162, 76, 0.2);
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-family-en);
        }

        .news-sidebar__rank--top {
            background: var(--color-accent);
            color: #1A1A1A;
        }

        .news-sidebar__text {
            font-size: 13px;
            color: var(--text-body);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ========== 产品截图舞台 ========== */
        .showcase {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .showcase-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

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

        .showcase-card__image {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            background: var(--bg-card-alt);
        }

        .showcase-card__body {
            padding: 16px;
        }

        .showcase-card__title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .showcase-card__desc {
            font-size: 12px;
            color: var(--text-dim);
            line-height: 18px;
        }

        .showcase-card__tag {
            display: inline-block;
            font-size: 11px;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(0, 212, 255, 0.1);
            color: var(--color-neon);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ========== 优惠阶梯 ========== */
        .tiers {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            align-items: stretch;
        }

        .tier-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            text-align: center;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 16px;
            position: relative;
        }

        .tier-card--featured {
            border-color: var(--color-accent);
            box-shadow: 0 0 24px rgba(200, 162, 76, 0.15);
            transform: scale(1.03);
            z-index: 1;
        }

        .tier-card--featured:hover {
            transform: scale(1.05);
            box-shadow: 0 0 32px rgba(200, 162, 76, 0.25);
        }

        .tier-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .tier-card--featured:hover {
            transform: scale(1.05);
        }

        .tier-card__badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-accent);
            color: #1A1A1A;
            font-size: 11px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 12px;
            letter-spacing: 0.05em;
            white-space: nowrap;
        }

        .tier-card__name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
        }

        .tier-card__price {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-accent);
            font-family: var(--font-family-en);
        }

        .tier-card__price span {
            font-size: 14px;
            font-weight: 400;
            color: var(--text-muted);
        }

        .tier-card__features {
            display: flex;
            flex-direction: column;
            gap: 10px;
            text-align: left;
            flex: 1;
        }

        .tier-card__feature {
            font-size: 13px;
            color: var(--text-body);
            padding-left: 18px;
            position: relative;
            line-height: 20px;
        }

        .tier-card__feature::before {
            content: '';
            position: absolute;
            left: 0;
            top: 7px;
            width: 6px;
            height: 6px;
            border-radius: var(--radius-full);
            background: var(--color-accent);
        }

        .tier-card__feature--disabled {
            color: var(--text-dim);
            opacity: 0.5;
        }

        .tier-card__feature--disabled::before {
            background: var(--text-dim);
        }

        .tier-card__btn {
            margin-top: auto;
        }

        /* ========== 精选分类 ========== */
        .categories {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 14px;
        }

        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px 14px;
            text-align: center;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .category-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .category-card__icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(200, 162, 76, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            font-size: 22px;
            color: var(--color-accent);
        }

        .category-card__name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .category-card__count {
            font-size: 11px;
            color: var(--text-dim);
            margin-top: 4px;
        }

        /* ========== 观点解读 ========== */
        .insights {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .insight-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px;
            border-left: 3px solid var(--color-accent);
            transition: all var(--transition-smooth);
        }

        .insight-card:hover {
            border-left-color: var(--color-neon);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .insight-card__quote {
            font-size: 14px;
            color: var(--text-body);
            line-height: 22px;
            font-style: italic;
            margin-bottom: 12px;
        }

        .insight-card__author {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ========== 开始使用 CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, #1A1A1A 0%, #252525 50%, #1A1A1A 100%);
            text-align: center;
            padding: 70px 0;
        }

        .cta-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            max-width: 520px;
            margin: 0 auto;
            box-shadow: var(--shadow-md);
        }

        .cta-card__title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .cta-card__desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 22px;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cta-form__input {
            width: 100%;
            padding: 12px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-input);
            border-radius: var(--radius-xs);
            color: var(--text-primary);
            font-size: 14px;
            transition: all var(--transition-smooth);
        }

        .cta-form__input::placeholder {
            color: var(--text-dim);
        }

        .cta-form__input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 10px var(--color-accent-glow);
        }

        .cta-form__note {
            font-size: 12px;
            color: var(--text-dim);
            margin-top: 8px;
        }

        .cta-form__note a {
            color: var(--color-accent);
            text-decoration: underline;
            transition: color var(--transition-smooth);
        }

        .cta-form__note a:hover {
            color: var(--color-accent-hover);
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: rgba(40, 40, 40, 0.6);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .faq-item--open {
            border-color: var(--border-light);
        }

        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            gap: 12px;
            transition: color var(--transition-smooth);
        }

        .faq-item__question:hover {
            color: var(--color-accent);
        }

        .faq-item__icon {
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            position: relative;
            transition: transform var(--transition-smooth);
        }

        .faq-item__icon::before,
        .faq-item__icon::after {
            content: '';
            position: absolute;
            background: var(--color-accent);
            border-radius: 1px;
            transition: all var(--transition-smooth);
        }

        .faq-item__icon::before {
            width: 100%;
            height: 2px;
            top: 50%;
            left: 0;
            transform: translateY(-50%);
        }

        .faq-item__icon::after {
            width: 2px;
            height: 100%;
            left: 50%;
            top: 0;
            transform: translateX(-50%);
        }

        .faq-item--open .faq-item__icon {
            transform: rotate(180deg);
        }

        .faq-item--open .faq-item__icon::after {
            transform: translateX(-50%) scaleY(0);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-smooth);
            padding: 0 20px;
        }

        .faq-item--open .faq-item__answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }

        .faq-item__answer p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 22px;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--color-secondary-bg);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
        }

        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer__brand {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer__logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent);
            letter-spacing: 0.03em;
        }

        .footer__brand-desc {
            font-size: 13px;
            color: var(--text-dim);
            line-height: 20px;
            max-width: 320px;
        }

        .footer__links-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer__links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer__link {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-smooth);
        }

        .footer__link:hover {
            color: var(--color-accent);
        }

        .footer__social {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .footer__social-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-smooth);
            cursor: pointer;
            font-size: 16px;
            color: var(--text-muted);
            border: 1px solid transparent;
        }

        .footer__social-icon:hover {
            background: var(--color-accent);
            color: #1A1A1A;
            border-color: var(--color-accent);
            box-shadow: var(--shadow-glow);
        }

        .footer__bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: var(--text-dim);
            letter-spacing: 0.02em;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            h1 {
                font-size: 30px;
                line-height: 40px;
            }
            h2 {
                font-size: 24px;
                line-height: 32px;
            }
            .hero__grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero__card-panel {
                max-width: 480px;
            }
            .pain-points {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .showcase {
                grid-template-columns: repeat(2, 1fr);
            }
            .categories {
                grid-template-columns: repeat(3, 1fr);
            }
            .insights {
                grid-template-columns: repeat(2, 1fr);
            }
            .tiers {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 14px;
            }
            .tier-card {
                padding: 20px 16px;
            }
            .tier-card--featured {
                transform: scale(1.01);
            }
            .tier-card--featured:hover {
                transform: scale(1.03);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 60px;
                --nav-height: 56px;
            }
            h1 {
                font-size: 26px;
                line-height: 36px;
            }
            h2 {
                font-size: 22px;
                line-height: 30px;
            }
            .hero {
                background-attachment: scroll;
                min-height: auto;
            }
            .hero__content {
                padding: 40px 0;
            }
            .hero__title {
                font-size: 26px;
                line-height: 36px;
                padding-left: 14px;
            }
            .hero__title::before {
                height: 44px;
                top: 4px;
                width: 3px;
            }
            .hero__subtitle {
                font-size: 14px;
                line-height: 22px;
            }
            .nav__links {
                display: none;
            }
            .nav__cta {
                display: none;
            }
            .nav__hamburger {
                display: flex;
            }
            .nav__mobile-menu {
                display: flex;
            }
            .pain-points {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .step-card__arrow {
                display: none;
            }
            .showcase {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .categories {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .insights {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .tiers {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .tier-card--featured {
                transform: none;
            }
            .tier-card--featured:hover {
                transform: translateY(-3px);
            }
            .section__header {
                margin-bottom: 32px;
            }
            .section__title {
                font-size: 22px;
                line-height: 30px;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .footer__brand-desc {
                max-width: 100%;
            }
            .footer__social {
                justify-content: center;
            }
            .cta-card {
                padding: 24px 18px;
            }
        }

        @media (max-width: 520px) {
            h1 {
                font-size: 22px;
                line-height: 30px;
            }
            h2 {
                font-size: 20px;
                line-height: 28px;
            }
            .hero__title {
                font-size: 22px;
                line-height: 30px;
            }
            .hero__actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .categories {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .category-card {
                padding: 14px 10px;
            }
            .category-card__name {
                font-size: 12px;
            }
            .section {
                padding: 40px 0;
            }
            .faq-item__question {
                font-size: 14px;
                padding: 14px 16px;
            }
        }