/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --color-primary: #FF6B00;
        --color-primary-dark: #E05A00;
        --color-primary-light: #FF8C33;
        --color-secondary: #1A1A2E;
        --color-secondary-light: #2D2D4A;
        --color-accent: #00C853;
        --color-bg: #F5F6FA;
        --color-bg-alt: #FFFFFF;
        --color-bg-dark: #0F0F1A;
        --color-text: #2C2C2C;
        --color-text-light: #6B7280;
        --color-text-white: #FFFFFF;
        --color-border: #E5E7EB;
        --color-border-light: #F0F0F0;
        --color-shadow: rgba(0, 0, 0, 0.08);
        --color-shadow-hover: rgba(0, 0, 0, 0.15);
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px var(--color-shadow);
        --shadow-md: 0 4px 20px var(--color-shadow);
        --shadow-lg: 0 8px 40px var(--color-shadow);
        --shadow-hover: 0 12px 48px var(--color-shadow-hover);
        --space-xs: 4px;
        --space-sm: 8px;
        --space-md: 16px;
        --space-lg: 24px;
        --space-xl: 40px;
        --space-2xl: 64px;
        --space-3xl: 96px;
        --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        --max-width: 1200px;
        --header-height: 72px;
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== 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-family);
        font-size: 16px;
        line-height: 1.6;
        color: var(--color-text);
        background: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-sm);
    }

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

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

    button,
    input,
    select,
    textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
        outline: none;
        border: none;
    }

    button {
        cursor: pointer;
        background: none;
    }

    ul,
    ol {
        list-style: none;
    }

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

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

    .container--narrow {
        max-width: 840px;
    }

    /* ===== Header / 导航 ===== */
    .header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--color-border);
        height: var(--header-height);
        display: flex;
        align-items: center;
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
    }

    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
    }

    .header__logo {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
        font-size: 24px;
        font-weight: 800;
        color: var(--color-primary);
        letter-spacing: -0.5px;
        flex-shrink: 0;
    }

    .header__logo i {
        font-size: 28px;
        color: var(--color-primary);
    }

    .header__logo span {
        background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .header__nav {
        display: flex;
        align-items: center;
        gap: var(--space-sm);
    }

    .nav__list {
        display: flex;
        align-items: center;
        gap: var(--space-xs);
    }

    .nav__item {
        position: relative;
    }

    .nav__link {
        display: inline-flex;
        align-items: center;
        gap: var(--space-xs);
        padding: var(--space-sm) var(--space-md);
        border-radius: var(--radius-xl);
        font-size: 15px;
        font-weight: 500;
        color: var(--color-text-light);
        transition: all var(--transition);
        white-space: nowrap;
    }

    .nav__link i {
        font-size: 14px;
    }

    .nav__link:hover {
        color: var(--color-primary);
        background: rgba(255, 107, 0, 0.08);
    }

    .nav__link--active {
        color: var(--color-primary);
        background: rgba(255, 107, 0, 0.12);
        font-weight: 600;
    }

    .nav__link--chip {
        background: var(--color-secondary);
        color: var(--color-text-white);
        padding: var(--space-xs) var(--space-md);
        border-radius: var(--radius-xl);
        font-size: 14px;
        font-weight: 600;
    }

    .nav__link--chip:hover {
        background: var(--color-secondary-light);
        color: var(--color-text-white);
        transform: translateY(-1px);
        box-shadow: var(--shadow-sm);
    }

    .nav__link--chip i {
        font-size: 13px;
    }

    .header__actions {
        display: flex;
        align-items: center;
        gap: var(--space-md);
    }

    .header__search {
        display: flex;
        align-items: center;
        background: var(--color-bg);
        border-radius: var(--radius-xl);
        padding: 0 var(--space-md);
        border: 1px solid var(--color-border);
        transition: all var(--transition);
    }

    .header__search:focus-within {
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.15);
    }

    .header__search input {
        padding: var(--space-sm) 0;
        background: transparent;
        color: var(--color-text);
        width: 160px;
        font-size: 14px;
    }

    .header__search input::placeholder {
        color: var(--color-text-light);
    }

    .header__search button {
        color: var(--color-text-light);
        padding: var(--space-sm);
        transition: color var(--transition);
    }

    .header__search button:hover {
        color: var(--color-primary);
    }

    .btn--cta {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
        color: var(--color-text-white);
        padding: var(--space-sm) var(--space-lg);
        border-radius: var(--radius-xl);
        font-weight: 600;
        font-size: 15px;
        transition: all var(--transition);
        box-shadow: 0 4px 16px rgba(255, 107, 0, 0.3);
        border: none;
    }

    .btn--cta i {
        font-size: 16px;
    }

    .btn--cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(255, 107, 0, 0.4);
        color: var(--color-text-white);
    }

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

    .btn--outline {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        background: transparent;
        color: var(--color-primary);
        border: 2px solid var(--color-primary);
        padding: var(--space-sm) var(--space-lg);
        border-radius: var(--radius-xl);
        font-weight: 600;
        font-size: 15px;
        transition: all var(--transition);
    }

    .btn--outline:hover {
        background: var(--color-primary);
        color: var(--color-text-white);
        transform: translateY(-2px);
    }

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

    .btn--secondary {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        background: var(--color-secondary);
        color: var(--color-text-white);
        padding: var(--space-sm) var(--space-lg);
        border-radius: var(--radius-xl);
        font-weight: 600;
        font-size: 15px;
        transition: all var(--transition);
        border: none;
    }

    .btn--secondary:hover {
        background: var(--color-secondary-light);
        color: var(--color-text-white);
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }

    /* ===== 移动端菜单按钮 ===== */
    .mobile-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: var(--space-sm);
        cursor: pointer;
        background: none;
        border: none;
    }

    .mobile-toggle span {
        width: 26px;
        height: 3px;
        background: var(--color-secondary);
        border-radius: 3px;
        transition: all var(--transition);
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 560px;
        display: flex;
        align-items: center;
        background: var(--color-bg-dark);
        overflow: hidden;
    }

    .hero__bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.5;
        mix-blend-mode: overlay;
    }

    .hero__overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(26, 26, 46, 0.92) 40%, rgba(255, 107, 0, 0.25) 100%);
    }

    .hero .container {
        position: relative;
        z-index: 2;
        text-align: center;
        padding-top: var(--space-2xl);
        padding-bottom: var(--space-2xl);
    }

    .hero__badge {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        background: rgba(255, 107, 0, 0.2);
        color: var(--color-primary-light);
        padding: var(--space-xs) var(--space-md);
        border-radius: var(--radius-xl);
        font-size: 14px;
        font-weight: 600;
        margin-bottom: var(--space-lg);
        backdrop-filter: blur(4px);
        border: 1px solid rgba(255, 107, 0, 0.25);
    }

    .hero__badge i {
        font-size: 16px;
    }

    .hero__title {
        font-size: 52px;
        font-weight: 900;
        color: var(--color-text-white);
        line-height: 1.15;
        margin-bottom: var(--space-lg);
        letter-spacing: -1px;
    }

    .hero__title .highlight {
        background: linear-gradient(135deg, var(--color-primary), #FFB347);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .hero__desc {
        font-size: 20px;
        color: rgba(255, 255, 255, 0.75);
        max-width: 680px;
        margin: 0 auto var(--space-xl);
        line-height: 1.7;
    }

    .hero__actions {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-md);
        flex-wrap: wrap;
    }

    .hero__actions .btn--cta {
        padding: var(--space-md) var(--space-xl);
        font-size: 18px;
    }

    .hero__stats {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-2xl);
        margin-top: var(--space-2xl);
        padding-top: var(--space-xl);
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .hero__stat {
        text-align: center;
    }

    .hero__stat-number {
        font-size: 36px;
        font-weight: 900;
        color: var(--color-text-white);
        line-height: 1.2;
    }

    .hero__stat-number .num {
        background: linear-gradient(135deg, var(--color-primary), #FFB347);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .hero__stat-label {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.55);
        margin-top: var(--space-xs);
    }

    /* ===== 板块通用 ===== */
    .section {
        padding: var(--space-3xl) 0;
    }

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

    .section--dark {
        background: var(--color-bg-dark);
        color: var(--color-text-white);
    }

    .section__header {
        text-align: center;
        max-width: 720px;
        margin: 0 auto var(--space-2xl);
    }

    .section__tag {
        display: inline-flex;
        align-items: center;
        gap: var(--space-sm);
        background: rgba(255, 107, 0, 0.1);
        color: var(--color-primary);
        padding: var(--space-xs) var(--space-md);
        border-radius: var(--radius-xl);
        font-size: 14px;
        font-weight: 600;
        margin-bottom: var(--space-md);
    }

    .section__tag i {
        font-size: 14px;
    }

    .section__title {
        font-size: 36px;
        font-weight: 800;
        color: var(--color-secondary);
        margin-bottom: var(--space-md);
    }

    .section--dark .section__title {
        color: var(--color-text-white);
    }

    .section__desc {
        font-size: 18px;
        color: var(--color-text-light);
        line-height: 1.7;
    }

    .section--dark .section__desc {
        color: rgba(255, 255, 255, 0.65);
    }

    /* ===== 卡片网格 ===== */
    .grid {
        display: grid;
        gap: var(--space-lg);
    }

    .grid--2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid--3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid--4 {
        grid-template-columns: repeat(4, 1fr);
    }

    /* ===== 卡片 ===== */
    .card {
        background: var(--color-bg-alt);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        overflow: hidden;
        transition: all var(--transition);
        border: 1px solid var(--color-border-light);
    }

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

    .card__image {
        width: 100%;
        aspect-ratio: 16 / 9;
        object-fit: cover;
        border-radius: var(--radius-md) var(--radius-md) 0 0;
    }

    .card__body {
        padding: var(--space-lg);
    }

    .card__tag {
        display: inline-block;
        background: rgba(255, 107, 0, 0.1);
        color: var(--color-primary);
        padding: 2px var(--space-sm);
        border-radius: var(--radius-sm);
        font-size: 12px;
        font-weight: 600;
        margin-bottom: var(--space-sm);
    }

    .card__title {
        font-size: 18px;
        font-weight: 700;
        color: var(--color-secondary);
        margin-bottom: var(--space-sm);
        line-height: 1.4;
    }

    .card__title a {
        color: inherit;
    }

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

    .card__desc {
        font-size: 14px;
        color: var(--color-text-light);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .card__meta {
        display: flex;
        align-items: center;
        gap: var(--space-md);
        margin-top: var(--space-md);
        font-size: 13px;
        color: var(--color-text-light);
    }

    .card__meta i {
        margin-right: 4px;
    }

    .card--featured {
        border: 2px solid var(--color-primary);
        position: relative;
    }

    .card--featured::before {
        content: '推荐';
        position: absolute;
        top: var(--space-sm);
        right: var(--space-sm);
        background: var(--color-primary);
        color: var(--color-text-white);
        padding: 2px var(--space-sm);
        border-radius: var(--radius-sm);
        font-size: 12px;
        font-weight: 700;
        z-index: 2;
    }

    /* ===== 分类标签 ===== */
    .categories {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-sm);
        flex-wrap: wrap;
        margin-bottom: var(--space-xl);
    }

    .category-chip {
        display: inline-flex;
        align-items: center;
        gap: var(--space-xs);
        padding: var(--space-sm) var(--space-md);
        border-radius: var(--radius-xl);
        font-size: 14px;
        font-weight: 500;
        color: var(--color-text-light);
        background: var(--color-bg-alt);
        border: 1px solid var(--color-border);
        transition: all var(--transition);
        cursor: pointer;
    }

    .category-chip:hover {
        color: var(--color-primary);
        border-color: var(--color-primary);
        background: rgba(255, 107, 0, 0.05);
    }

    .category-chip--active {
        color: var(--color-text-white);
        background: var(--color-primary);
        border-color: var(--color-primary);
        font-weight: 600;
    }

    .category-chip--active:hover {
        color: var(--color-text-white);
        background: var(--color-primary-dark);
    }

    /* ===== 特色 / 数据区块 ===== */
    .features {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-lg);
    }

    .feature-card {
        text-align: center;
        padding: var(--space-xl) var(--space-lg);
        background: var(--color-bg-alt);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--color-border-light);
        transition: all var(--transition);
    }

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

    .feature-card__icon {
        width: 64px;
        height: 64px;
        margin: 0 auto var(--space-md);
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 107, 0, 0.1);
        border-radius: var(--radius-md);
        font-size: 28px;
        color: var(--color-primary);
        transition: all var(--transition);
    }

    .feature-card:hover .feature-card__icon {
        background: var(--color-primary);
        color: var(--color-text-white);
        transform: scale(1.05);
    }

    .feature-card__title {
        font-size: 18px;
        font-weight: 700;
        color: var(--color-secondary);
        margin-bottom: var(--space-sm);
    }

    .feature-card__desc {
        font-size: 14px;
        color: var(--color-text-light);
        line-height: 1.6;
    }

    /* ===== 步骤/流程 ===== */
    .steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-lg);
        position: relative;
    }

    .step {
        text-align: center;
        position: relative;
    }

    .step__number {
        width: 52px;
        height: 52px;
        margin: 0 auto var(--space-md);
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--color-primary);
        color: var(--color-text-white);
        border-radius: 50%;
        font-size: 22px;
        font-weight: 800;
        box-shadow: 0 4px 16px rgba(255, 107, 0, 0.3);
    }

    .step__title {
        font-size: 18px;
        font-weight: 700;
        color: var(--color-secondary);
        margin-bottom: var(--space-sm);
    }

    .section--dark .step__title {
        color: var(--color-text-white);
    }

    .step__desc {
        font-size: 14px;
        color: var(--color-text-light);
        line-height: 1.6;
    }

    .section--dark .step__desc {
        color: rgba(255, 255, 255, 0.6);
    }

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

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

    .faq-item:hover {
        border-color: var(--color-border);
        box-shadow: var(--shadow-sm);
    }

    .faq-item__question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--space-lg);
        font-size: 16px;
        font-weight: 600;
        color: var(--color-secondary);
        cursor: pointer;
        user-select: none;
        transition: color var(--transition);
    }

    .faq-item__question i {
        font-size: 18px;
        color: var(--color-primary);
        transition: transform var(--transition);
    }

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

    .faq-item__answer {
        padding: 0 var(--space-lg) var(--space-lg);
        font-size: 15px;
        color: var(--color-text-light);
        line-height: 1.7;
        display: none;
    }

    .faq-item--open .faq-item__answer {
        display: block;
    }

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

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
        padding: var(--space-3xl) 0;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        opacity: 0.08;
        mix-blend-mode: overlay;
    }

    .cta-section .container {
        position: relative;
        z-index: 2;
    }

    .cta-section__title {
        font-size: 38px;
        font-weight: 900;
        color: var(--color-text-white);
        margin-bottom: var(--space-md);
    }

    .cta-section__desc {
        font-size: 18px;
        color: rgba(255, 255, 255, 0.7);
        max-width: 600px;
        margin: 0 auto var(--space-xl);
    }

    .cta-section__actions {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--space-md);
        flex-wrap: wrap;
    }

    .cta-section .btn--cta {
        background: var(--color-text-white);
        color: var(--color-primary);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    }

    .cta-section .btn--cta:hover {
        background: var(--color-bg);
        color: var(--color-primary-dark);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    }

    .cta-section .btn--outline {
        border-color: rgba(255, 255, 255, 0.4);
        color: var(--color-text-white);
    }

    .cta-section .btn--outline:hover {
        border-color: var(--color-text-white);
        background: rgba(255, 255, 255, 0.1);
        color: var(--color-text-white);
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--color-bg-dark);
        color: rgba(255, 255, 255, 0.7);
        padding: var(--space-2xl) 0 var(--space-lg);
    }

    .footer__grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: var(--space-xl);
        margin-bottom: var(--space-xl);
    }

    .footer__brand .header__logo {
        font-size: 22px;
        margin-bottom: var(--space-md);
    }

    .footer__brand .header__logo span {
        -webkit-text-fill-color: var(--color-primary);
    }

    .footer__brand p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.5);
        line-height: 1.7;
        max-width: 300px;
    }

    .footer__heading {
        font-size: 16px;
        font-weight: 700;
        color: var(--color-text-white);
        margin-bottom: var(--space-md);
    }

    .footer__links {
        display: flex;
        flex-direction: column;
        gap: var(--space-sm);
    }

    .footer__links a {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.55);
        transition: all var(--transition);
        display: inline-flex;
        align-items: center;
        gap: var(--space-xs);
    }

    .footer__links a:hover {
        color: var(--color-primary);
        transform: translateX(2px);
    }

    .footer__bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: var(--space-lg);
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: var(--space-md);
        font-size: 13px;
        color: rgba(255, 255, 255, 0.4);
    }

    .footer__bottom a {
        color: rgba(255, 255, 255, 0.4);
    }

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

    /* ===== 列表样式 ===== */
    .content-list {
        display: flex;
        flex-direction: column;
        gap: var(--space-md);
    }

    .content-list__item {
        display: flex;
        align-items: flex-start;
        gap: var(--space-md);
        padding: var(--space-md);
        background: var(--color-bg-alt);
        border-radius: var(--radius-md);
        border: 1px solid var(--color-border-light);
        transition: all var(--transition);
    }

    .content-list__item:hover {
        border-color: var(--color-border);
        box-shadow: var(--shadow-sm);
        transform: translateX(4px);
    }

    .content-list__item .card__tag {
        flex-shrink: 0;
    }

    .content-list__item .card__title {
        font-size: 16px;
        margin-bottom: 4px;
    }

    .content-list__item .card__desc {
        font-size: 13px;
    }

    /* ===== 空状态 ===== */
    .empty-state {
        text-align: center;
        padding: var(--space-2xl);
        color: var(--color-text-light);
    }

    .empty-state i {
        font-size: 48px;
        color: var(--color-border);
        margin-bottom: var(--space-md);
    }

    .empty-state p {
        font-size: 16px;
    }

    /* ===== 加载动画 ===== */
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(24px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .animate-in {
        animation: fadeInUp 0.6s ease forwards;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .features {
            grid-template-columns: repeat(2, 1fr);
        }

        .steps {
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-xl);
        }

        .footer__grid {
            grid-template-columns: 1fr 1fr;
        }

        .grid--4 {
            grid-template-columns: repeat(2, 1fr);
        }

        .hero__title {
            font-size: 40px;
        }

        .header__search input {
            width: 120px;
        }
    }

    @media (max-width: 768px) {
        :root {
            --header-height: 64px;
        }

        .header__nav {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            flex-direction: column;
            padding: var(--space-md);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
            transform: translateY(-120%);
            opacity: 0;
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 99;
            gap: var(--space-sm);
        }

        .header__nav--open {
            transform: translateY(0);
            opacity: 1;
        }

        .nav__list {
            flex-direction: column;
            width: 100%;
            gap: var(--space-xs);
        }

        .nav__link {
            width: 100%;
            justify-content: center;
            padding: var(--space-sm) var(--space-md);
        }

        .header__actions {
            width: 100%;
            flex-direction: column;
            gap: var(--space-sm);
            margin-top: var(--space-sm);
        }

        .header__search {
            width: 100%;
        }

        .header__search input {
            width: 100%;
        }

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

        .mobile-toggle {
            display: flex;
        }

        .hero {
            min-height: 420px;
        }

        .hero__title {
            font-size: 32px;
        }

        .hero__desc {
            font-size: 17px;
        }

        .hero__stats {
            gap: var(--space-lg);
            flex-wrap: wrap;
        }

        .hero__stat-number {
            font-size: 28px;
        }

        .section {
            padding: var(--space-2xl) 0;
        }

        .section__title {
            font-size: 28px;
        }

        .grid--2,
        .grid--3,
        .grid--4 {
            grid-template-columns: 1fr;
        }

        .features {
            grid-template-columns: 1fr 1fr;
        }

        .steps {
            grid-template-columns: 1fr;
            max-width: 360px;
            margin: 0 auto;
        }

        .footer__grid {
            grid-template-columns: 1fr;
            gap: var(--space-lg);
        }

        .footer__bottom {
            flex-direction: column;
            text-align: center;
        }

        .cta-section__title {
            font-size: 28px;
        }

        .categories {
            flex-wrap: nowrap;
            overflow-x: auto;
            padding-bottom: var(--space-sm);
            justify-content: flex-start;
            -webkit-overflow-scrolling: touch;
        }

        .category-chip {
            flex-shrink: 0;
        }
    }

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

        .hero__title {
            font-size: 26px;
        }

        .hero__desc {
            font-size: 15px;
        }

        .hero__stats {
            flex-direction: column;
            gap: var(--space-md);
        }

        .features {
            grid-template-columns: 1fr;
        }

        .section__title {
            font-size: 24px;
        }

        .hero__actions {
            flex-direction: column;
            width: 100%;
        }

        .hero__actions .btn--cta,
        .hero__actions .btn--outline {
            width: 100%;
            justify-content: center;
        }

        .cta-section__actions {
            flex-direction: column;
            width: 100%;
        }

        .cta-section__actions .btn--cta,
        .cta-section__actions .btn--outline {
            width: 100%;
            justify-content: center;
        }
    }

    /* ===== 辅助 ===== */
    .text-center {
        text-align: center;
    }

    .mt-lg {
        margin-top: var(--space-lg);
    }

    .mt-xl {
        margin-top: var(--space-xl);
    }

    .gap-md {
        gap: var(--space-md);
    }

    .flex-center {
        display: flex;
        align-items: center;
        justify-content: center;
    }

/* roulang page: article */
:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --secondary: #f59e0b;
    --secondary-light: #fbbf24;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-dark: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --text-white: #f1f5f9;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --shadow: 0 4px 24px rgba(15,23,42,0.08);
    --shadow-lg: 0 12px 48px rgba(15,23,42,0.12);
    --shadow-hover: 0 8px 32px rgba(245,158,11,0.20);
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
    --font: 'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
    --max-w: 1200px;
    --header-h: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color var(--transition)}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-sm)}
button,input,textarea{font-family:inherit;font-size:inherit;outline:none;border:none}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* header */
.header{
    position:fixed;top:0;left:0;right:0;z-index:1000;
    background:rgba(15,23,42,0.96);backdrop-filter:blur(20px);
    border-bottom:1px solid rgba(255,255,255,0.06);
    height:var(--header-h);display:flex;align-items:center
}
.header .container{display:flex;align-items:center;justify-content:space-between;gap:24px}
.header__logo{
    display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:700;
    color:var(--text-white);letter-spacing:-0.3px;flex-shrink:0
}
.header__logo i{color:var(--secondary);font-size:1.5rem}
.header__logo span{background:linear-gradient(135deg,#f59e0b,#fbbf24);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.header__nav{display:flex;align-items:center;gap:20px;flex:1;justify-content:flex-end}
.nav__list{display:flex;align-items:center;gap:6px}
.nav__item{position:relative}
.nav__link{
    display:flex;align-items:center;gap:6px;
    padding:8px 18px;border-radius:100px;
    font-size:0.9rem;font-weight:500;color:var(--text-white);
    background:transparent;transition:all var(--transition);
    white-space:nowrap
}
.nav__link i{font-size:0.85rem;opacity:0.7}
.nav__link:hover{background:rgba(255,255,255,0.10);color:var(--secondary)}
.nav__link--active{background:rgba(245,158,11,0.18);color:var(--secondary);font-weight:600}
.nav__link--active i{opacity:1}
.nav__link--chip{
    background:rgba(255,255,255,0.06);
    border:1px solid rgba(255,255,255,0.10);
    padding:7px 18px
}
.nav__link--chip:hover{border-color:var(--secondary);background:rgba(245,158,11,0.10)}
.header__actions{display:flex;align-items:center;gap:14px;flex-shrink:0}
.header__search{
    display:flex;align-items:center;
    background:rgba(255,255,255,0.08);
    border-radius:100px;padding:4px 4px 4px 16px;
    border:1px solid rgba(255,255,255,0.08);
    transition:all var(--transition);min-width:180px
}
.header__search:focus-within{border-color:var(--secondary);background:rgba(255,255,255,0.12)}
.header__search input{
    background:transparent;color:var(--text-white);font-size:0.85rem;
    width:100%;padding:6px 0
}
.header__search input::placeholder{color:rgba(255,255,255,0.35)}
.header__search button{
    background:transparent;color:var(--text-white);opacity:0.6;
    padding:8px 14px;border-radius:100px;cursor:pointer;transition:all var(--transition)
}
.header__search button:hover{opacity:1;color:var(--secondary)}
.btn--cta{
    display:inline-flex;align-items:center;gap:8px;
    background:linear-gradient(135deg,#f59e0b,#d97706);
    color:var(--text-white);font-weight:600;font-size:0.9rem;
    padding:10px 24px;border-radius:100px;
    transition:all var(--transition);box-shadow:0 4px 16px rgba(245,158,11,0.30);
    white-space:nowrap
}
.btn--cta:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(245,158,11,0.40);background:linear-gradient(135deg,#fbbf24,#f59e0b)}
.header__toggle{display:none;background:transparent;color:var(--text-white);font-size:1.5rem;cursor:pointer;padding:4px}
@media(max-width:1024px){
    .header__search{min-width:140px}
    .nav__link{padding:8px 14px;font-size:0.85rem}
}
@media(max-width:768px){
    .header__toggle{display:block}
    .header__nav{
        position:fixed;top:var(--header-h);left:0;right:0;
        background:rgba(15,23,42,0.98);backdrop-filter:blur(20px);
        flex-direction:column;padding:24px 20px;gap:20px;
        transform:translateY(-120%);opacity:0;pointer-events:none;
        transition:all 0.4s cubic-bezier(0.4,0,0.2,1);
        border-bottom:1px solid rgba(255,255,255,0.06);
        max-height:calc(100vh - var(--header-h));overflow-y:auto
    }
    .header__nav--open{transform:translateY(0);opacity:1;pointer-events:all}
    .nav__list{flex-direction:column;width:100%;gap:4px}
    .nav__link{width:100%;justify-content:center;padding:12px 20px;font-size:1rem}
    .header__actions{flex-direction:column;width:100%;gap:12px}
    .header__search{width:100%;min-width:unset}
    .btn--cta{width:100%;justify-content:center}
}

/* article banner */
.article-banner{
    position:relative;padding:120px 0 80px;margin-top:var(--header-h);
    background:var(--primary) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    min-height:380px;display:flex;align-items:center
}
.article-banner::before{
    content:'';position:absolute;inset:0;
    background:linear-gradient(135deg,rgba(15,23,42,0.88) 0%,rgba(15,23,42,0.60) 60%,rgba(15,23,42,0.40) 100%);
    z-index:1
}
.article-banner .container{position:relative;z-index:2;text-align:center}
.article-banner__category{
    display:inline-flex;align-items:center;gap:6px;
    background:rgba(245,158,11,0.20);color:var(--secondary);
    padding:6px 18px;border-radius:100px;font-size:0.85rem;font-weight:500;
    margin-bottom:20px;border:1px solid rgba(245,158,11,0.20)
}
.article-banner__category i{font-size:0.75rem}
.article-banner__title{
    font-size:2.6rem;font-weight:800;color:var(--text-white);
    line-height:1.25;max-width:800px;margin:0 auto 16px;
    letter-spacing:-0.5px
}
.article-banner__meta{
    display:flex;align-items:center;justify-content:center;gap:20px;
    color:rgba(255,255,255,0.65);font-size:0.9rem;flex-wrap:wrap
}
.article-banner__meta i{margin-right:6px;opacity:0.6}
.article-banner__meta span{display:flex;align-items:center}
@media(max-width:768px){
    .article-banner{padding:100px 0 60px;min-height:300px}
    .article-banner__title{font-size:1.8rem}
    .article-banner__meta{gap:12px;font-size:0.8rem;flex-wrap:wrap}
}
@media(max-width:520px){
    .article-banner__title{font-size:1.4rem}
    .article-banner{padding:80px 0 40px;min-height:240px}
}

/* article content */
.article-content{
    padding:60px 0 40px;background:var(--bg)
}
.article-content__inner{
    max-width:820px;margin:0 auto;
    background:var(--bg-card);border-radius:var(--radius);
    padding:48px 56px;box-shadow:var(--shadow);
    border:1px solid var(--border)
}
.article-content__body{
    font-size:1.05rem;line-height:1.9;color:var(--text)
}
.article-content__body p{margin-bottom:1.5em}
.article-content__body h2{font-size:1.6rem;font-weight:700;margin:2em 0 0.8em;color:var(--primary)}
.article-content__body h3{font-size:1.25rem;font-weight:600;margin:1.5em 0 0.6em;color:var(--primary-light)}
.article-content__body ul,.article-content__body ol{padding-left:1.5em;margin-bottom:1.5em}
.article-content__body li{margin-bottom:0.5em;list-style:disc}
.article-content__body img{border-radius:var(--radius-sm);margin:1.5em 0;box-shadow:var(--shadow)}
.article-content__body blockquote{
    border-left:4px solid var(--secondary);padding:16px 24px;
    background:rgba(245,158,11,0.06);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    margin:1.5em 0;color:var(--text-light);font-style:italic
}
.article-content__empty{
    text-align:center;padding:60px 20px
}
.article-content__empty i{font-size:3rem;color:var(--text-light);opacity:0.4;margin-bottom:16px}
.article-content__empty h3{font-size:1.5rem;font-weight:600;color:var(--text);margin-bottom:12px}
.article-content__empty p{color:var(--text-light);margin-bottom:24px}
.article-content__empty .btn--cta{display:inline-flex}
@media(max-width:768px){
    .article-content{padding:40px 0 30px}
    .article-content__inner{padding:28px 20px;border-radius:var(--radius-sm)}
    .article-content__body{font-size:1rem}
}
@media(max-width:520px){
    .article-content__inner{padding:20px 16px}
}

/* article tags & share */
.article-tags{
    padding:0 0 40px;background:var(--bg)
}
.article-tags .container{max-width:820px}
.article-tags__inner{
    display:flex;align-items:center;justify-content:space-between;
    flex-wrap:wrap;gap:16px;
    background:var(--bg-card);border-radius:var(--radius);
    padding:20px 32px;box-shadow:var(--shadow);border:1px solid var(--border)
}
.article-tags__left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.article-tags__left i{color:var(--secondary);font-size:1rem}
.article-tags__list{display:flex;gap:8px;flex-wrap:wrap}
.tag{
    display:inline-flex;align-items:center;gap:4px;
    background:rgba(245,158,11,0.10);color:var(--secondary);
    padding:4px 14px;border-radius:100px;font-size:0.8rem;font-weight:500;
    border:1px solid rgba(245,158,11,0.15);transition:all var(--transition)
}
.tag:hover{background:var(--secondary);color:var(--text-white);transform:translateY(-1px)}
.article-tags__share{display:flex;align-items:center;gap:8px}
.article-tags__share span{font-size:0.85rem;color:var(--text-light)}
.share-btn{
    display:flex;align-items:center;justify-content:center;
    width:38px;height:38px;border-radius:50%;
    background:var(--border);color:var(--text-light);
    transition:all var(--transition);font-size:1rem
}
.share-btn:hover{background:var(--secondary);color:var(--text-white);transform:translateY(-2px)}
@media(max-width:768px){
    .article-tags__inner{padding:16px 20px;flex-direction:column;align-items:flex-start}
}

/* related section */
.related-section{
    padding:60px 0;background:var(--bg-dark);
    position:relative;overflow:hidden
}
.related-section::before{
    content:'';position:absolute;inset:0;
    background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    opacity:0.06;pointer-events:none
}
.related-section .container{position:relative;z-index:1}
.related-section__title{
    text-align:center;font-size:2rem;font-weight:700;color:var(--text-white);
    margin-bottom:12px;letter-spacing:-0.3px
}
.related-section__sub{
    text-align:center;color:rgba(255,255,255,0.5);
    margin-bottom:40px;font-size:1rem
}
.related-grid{
    display:grid;grid-template-columns:repeat(4,1fr);gap:20px
}
.related-card{
    background:rgba(255,255,255,0.06);border-radius:var(--radius);
    overflow:hidden;border:1px solid rgba(255,255,255,0.08);
    transition:all var(--transition);backdrop-filter:blur(10px)
}
.related-card:hover{transform:translateY(-6px);border-color:var(--secondary);box-shadow:0 12px 40px rgba(245,158,11,0.15)}
.related-card__img{height:160px;overflow:hidden;position:relative}
.related-card__img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease}
.related-card:hover .related-card__img img{transform:scale(1.08)}
.related-card__img::after{
    content:'';position:absolute;bottom:0;left:0;right:0;
    height:60%;background:linear-gradient(transparent,rgba(15,23,42,0.9))
}
.related-card__body{padding:16px 18px 20px}
.related-card__body h4{font-size:1rem;font-weight:600;color:var(--text-white);margin-bottom:6px;line-height:1.4}
.related-card__body p{font-size:0.82rem;color:rgba(255,255,255,0.5);line-height:1.5}
.related-card__tag{
    display:inline-block;background:rgba(245,158,11,0.20);color:var(--secondary);
    font-size:0.7rem;padding:2px 10px;border-radius:100px;margin-bottom:10px;font-weight:500
}
@media(max-width:1024px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.related-grid{grid-template-columns:1fr}
    .related-section__title{font-size:1.5rem}
}

/* cta section */
.cta-section{
    padding:80px 0;background:var(--bg);
    position:relative
}
.cta-section::before{
    content:'';position:absolute;inset:0;
    background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    opacity:0.04;pointer-events:none
}
.cta-section .container{position:relative;z-index:1;text-align:center}
.cta-section__title{
    font-size:2.2rem;font-weight:800;color:var(--primary);
    margin-bottom:16px;letter-spacing:-0.5px
}
.cta-section__sub{
    font-size:1.1rem;color:var(--text-light);
    margin-bottom:36px;max-width:600px;margin-left:auto;margin-right:auto
}
.cta-section__actions{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.cta-section__actions .btn--cta{font-size:1.05rem;padding:14px 36px}
.btn--outline{
    display:inline-flex;align-items:center;gap:8px;
    background:transparent;color:var(--primary);
    font-weight:600;font-size:1.05rem;padding:14px 36px;border-radius:100px;
    border:2px solid var(--primary);transition:all var(--transition)
}
.btn--outline:hover{background:var(--primary);color:var(--text-white);transform:translateY(-2px)}
@media(max-width:768px){
    .cta-section{padding:50px 0}
    .cta-section__title{font-size:1.6rem}
    .cta-section__sub{font-size:0.95rem}
}

/* faq */
.faq-section{
    padding:60px 0 80px;background:var(--bg)
}
.faq-section__title{
    text-align:center;font-size:2rem;font-weight:700;color:var(--primary);
    margin-bottom:8px;letter-spacing:-0.3px
}
.faq-section__sub{
    text-align:center;color:var(--text-light);margin-bottom:40px;font-size:1rem
}
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
    background:var(--bg-card);border-radius:var(--radius-sm);
    border:1px solid var(--border);overflow:hidden;
    transition:all var(--transition)
}
.faq-item:hover{border-color:var(--secondary);box-shadow:var(--shadow)}
.faq-item__q{
    display:flex;align-items:center;justify-content:space-between;
    padding:18px 24px;cursor:pointer;font-weight:600;font-size:1rem;
    color:var(--text);gap:12px;user-select:none;transition:color var(--transition)
}
.faq-item__q i{color:var(--secondary);font-size:1.1rem;transition:transform var(--transition);flex-shrink:0}
.faq-item__q .fa-chevron-down{color:var(--text-light);font-size:0.8rem}
.faq-item.active .faq-item__q .fa-chevron-down{transform:rotate(180deg);color:var(--secondary)}
.faq-item__a{
    max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease;
    padding:0 24px;color:var(--text-light);font-size:0.95rem;line-height:1.7
}
.faq-item.active .faq-item__a{
    max-height:300px;padding:0 24px 20px
}
@media(max-width:768px){
    .faq-section__title{font-size:1.5rem}
    .faq-item__q{padding:14px 18px;font-size:0.95rem}
    .faq-item__a{padding:0 18px}
    .faq-item.active .faq-item__a{padding:0 18px 16px}
}

/* footer */
.footer{
    background:var(--primary);color:var(--text-white);
    padding:60px 0 0;border-top:1px solid rgba(255,255,255,0.06)
}
.footer__grid{
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
    padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.06)
}
.footer__brand .header__logo{font-size:1.3rem;margin-bottom:16px;display:inline-flex}
.footer__brand p{font-size:0.9rem;color:rgba(255,255,255,0.55);line-height:1.7;max-width:360px}
.footer__heading{
    font-size:1rem;font-weight:600;color:var(--text-white);
    margin-bottom:18px;letter-spacing:0.3px
}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__links a{
    font-size:0.9rem;color:rgba(255,255,255,0.55);
    display:flex;align-items:center;gap:8px;transition:all var(--transition)
}
.footer__links a i{font-size:0.6rem;color:var(--secondary);opacity:0.7}
.footer__links a:hover{color:var(--secondary);transform:translateX(4px)}
.footer__bottom{
    display:flex;align-items:center;justify-content:space-between;
    padding:24px 0;font-size:0.85rem;color:rgba(255,255,255,0.40);flex-wrap:wrap;gap:12px
}
.footer__bottom a{color:rgba(255,255,255,0.50)}
.footer__bottom a:hover{color:var(--secondary)}
@media(max-width:1024px){.footer__grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:768px){
    .footer{padding:40px 0 0}
    .footer__grid{grid-template-columns:1fr;gap:28px}
    .footer__brand p{max-width:100%}
    .footer__bottom{flex-direction:column;text-align:center}
}

/* misc utilities */
.text-center{text-align:center}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mb-8{margin-bottom:8px}
.mb-16{margin-bottom:16px}
.gap-8{gap:8px}
.flex-center{display:flex;align-items:center;justify-content:center}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #4f46e5;
            --color-primary-light: #6366f1;
            --color-primary-dark: #3730a3;
            --color-primary-bg: rgba(79, 70, 229, 0.08);
            --color-accent: #f59e0b;
            --color-accent-light: #fbbf24;
            --color-accent-dark: #d97706;
            --color-bg: #f8fafc;
            --color-bg-alt: #f1f5f9;
            --color-bg-card: #ffffff;
            --color-bg-dark: #0f172a;
            --color-bg-dark-alt: #1e293b;
            --color-text: #1e293b;
            --color-text-light: #64748b;
            --color-text-lighter: #94a3b8;
            --color-text-inverse: #ffffff;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-error: #ef4444;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.14);
            --shadow-primary: 0 4px 20px rgba(79, 70, 229, 0.25);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ========== Reset / Base ========== */
        *,
        *::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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--color-primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== 容器 ========== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 通用板块间距 ========== */
        .section {
            padding: 80px 0;
        }
        .section--alt {
            background-color: var(--color-bg-alt);
        }
        .section--dark {
            background-color: var(--color-bg-dark);
            color: var(--color-text-inverse);
        }
        .section--dark h2,
        .section--dark h3,
        .section--dark .section__subtitle {
            color: var(--color-text-inverse);
        }
        .section__header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section__label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--color-primary);
            background: var(--color-primary-bg);
            padding: 4px 16px;
            border-radius: 100px;
            margin-bottom: 12px;
        }
        .section__title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--color-text);
        }
        .section__subtitle {
            font-size: 1.1rem;
            color: var(--color-text-light);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section__title {
                font-size: 1.6rem;
            }
            .section__subtitle {
                font-size: 1rem;
            }
            .section__header {
                margin-bottom: 32px;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
            .section__title {
                font-size: 1.35rem;
            }
        }

        /* ========== Header / Nav ========== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-primary-dark);
            text-decoration: none;
            flex-shrink: 0;
        }
        .header__logo i {
            font-size: 1.6rem;
            color: var(--color-primary);
        }
        .header__logo:hover {
            color: var(--color-primary);
        }
        .header__logo span {
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* 导航列表 */
        .header__nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav__list {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }
        .nav__item {
            position: relative;
        }
        .nav__link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-light);
            border-radius: 100px;
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav__link i {
            font-size: 0.9rem;
        }
        .nav__link:hover {
            color: var(--color-primary);
            background: var(--color-primary-bg);
        }
        .nav__link--active {
            color: var(--color-text-inverse) !important;
            background: var(--color-primary) !important;
            box-shadow: var(--shadow-primary);
        }
        .nav__link--active:hover {
            background: var(--color-primary-dark) !important;
            color: var(--color-text-inverse) !important;
        }
        .nav__link--chip {
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
        }
        .nav__link--chip:hover {
            border-color: var(--color-primary-light);
        }
        .nav__link--chip.nav__link--active {
            border-color: var(--color-primary);
            background: var(--color-primary) !important;
            color: var(--color-text-inverse) !important;
        }

        /* 右侧操作区 */
        .header__actions {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-left: 20px;
        }
        .header__search {
            display: flex;
            align-items: center;
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: 100px;
            padding: 0 4px 0 16px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header__search:focus-within {
            border-color: var(--color-primary-light);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
        }
        .header__search input {
            background: transparent;
            border: none;
            padding: 8px 8px 8px 0;
            font-size: 0.9rem;
            color: var(--color-text);
            width: 140px;
            transition: width var(--transition);
        }
        .header__search input::placeholder {
            color: var(--color-text-lighter);
        }
        .header__search input:focus {
            width: 180px;
        }
        .header__search button {
            background: var(--color-primary);
            color: #fff;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: background var(--transition), transform var(--transition);
        }
        .header__search button:hover {
            background: var(--color-primary-dark);
            transform: scale(1.05);
        }

        .btn--cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            border-radius: 100px;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn--cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
            color: #fff;
        }
        .btn--cta i {
            font-size: 0.9rem;
        }

        /* 移动端汉堡按钮 */
        .header__toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .header__toggle span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .header__toggle.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .header__toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .header__toggle.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        /* 移动端导航样式 */
        @media (max-width: 1024px) {
            .header__inner {
                padding: 0 16px;
            }
            .header__toggle {
                display: flex;
            }
            .header__nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 24px 20px 32px;
                gap: 20px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-slow);
                z-index: 999;
            }
            .header__nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav__list {
                flex-direction: column;
                gap: 8px;
                width: 100%;
            }
            .nav__link {
                width: 100%;
                justify-content: center;
                padding: 12px 20px;
                font-size: 1.05rem;
            }
            .header__actions {
                flex-direction: column;
                width: 100%;
                margin-left: 0;
                gap: 12px;
            }
            .header__search {
                width: 100%;
            }
            .header__search input {
                width: 100% !important;
                flex: 1;
            }
            .btn--cta {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== Hero / Banner ========== */
        .hero--page {
            padding: 140px 0 80px;
            position: relative;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
            isolation: isolate;
        }
        .hero--page::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(15, 23, 42, 0.55) 100%);
            z-index: 0;
        }
        .hero--page .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .hero--page h1 {
            font-size: 3rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }
        .hero--page p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.85rem;
            color: #fff;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hero__badge i {
            color: var(--color-accent);
        }
        .hero__stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 32px;
        }
        .hero__stat {
            text-align: center;
            color: #fff;
        }
        .hero__stat-num {
            font-size: 2rem;
            font-weight: 800;
            display: block;
            line-height: 1.2;
        }
        .hero__stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 768px) {
            .hero--page {
                padding: 120px 0 56px;
                min-height: 300px;
            }
            .hero--page h1 {
                font-size: 2rem;
            }
            .hero--page p {
                font-size: 1rem;
            }
            .hero__stats {
                gap: 24px;
            }
            .hero__stat-num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero--page h1 {
                font-size: 1.6rem;
            }
            .hero__stats {
                gap: 16px;
            }
            .hero__stat-num {
                font-size: 1.25rem;
            }
        }

        /* ========== 分类介绍 ========== */
        .intro__grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro__content h2 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }
        .intro__content p {
            color: var(--color-text-light);
            margin-bottom: 20px;
            line-height: 1.8;
        }
        .intro__tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 12px;
        }
        .intro__tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 100px;
            transition: all var(--transition);
        }
        .intro__tag:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .intro__image img {
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            transition: transform var(--transition-slow);
        }
        .intro__image img:hover {
            transform: scale(1.02);
        }
        @media (max-width: 768px) {
            .intro__grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro__content h2 {
                font-size: 1.4rem;
            }
            .intro__image {
                order: -1;
            }
        }

        /* ========== 卡片网格 ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border);
        }
        .card__image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }
        .card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card:hover .card__image img {
            transform: scale(1.06);
        }
        .card__badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 100px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
        }
        .card__body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-lighter);
            margin-bottom: 8px;
        }
        .card__meta i {
            color: var(--color-primary-light);
        }
        .card__title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            color: var(--color-text);
        }
        .card__text {
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }
        .card__footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
        }
        .card__author {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: var(--color-text-light);
        }
        .card__author i {
            color: var(--color-primary-light);
        }
        .card__btn {
            padding: 6px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-bg);
            border-radius: 100px;
            transition: all var(--transition);
            text-decoration: none;
        }
        .card__btn:hover {
            background: var(--color-primary);
            color: #fff;
        }
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .card__body {
                padding: 16px 18px 20px;
            }
        }

        /* ========== 特色区块 ========== */
        .features__grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .feature {
            text-align: center;
            padding: 36px 28px;
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .feature:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
        }
        .feature__icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: var(--color-primary-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-primary);
            transition: all var(--transition);
        }
        .feature:hover .feature__icon {
            background: var(--color-primary);
            color: #fff;
            transform: scale(1.08);
        }
        .feature h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
        }
        .feature p {
            font-size: 0.92rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .features__grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .feature {
                padding: 24px 18px;
            }
        }
        @media (max-width: 520px) {
            .features__grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 榜单列表 ========== */
        .rank__list {
            max-width: 780px;
            margin: 0 auto;
        }
        .rank__item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .rank__item:hover {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .rank__num {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--color-primary);
            min-width: 32px;
            text-align: center;
        }
        .rank__num--gold {
            color: var(--color-accent);
        }
        .rank__num--silver {
            color: var(--color-text-lighter);
        }
        .rank__num--bronze {
            color: #cd7f32;
        }
        .rank__info {
            flex: 1;
        }
        .rank__info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .rank__info span {
            font-size: 0.82rem;
            color: var(--color-text-lighter);
        }
        .rank__stats {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--color-text-lighter);
        }
        .rank__stats i {
            color: var(--color-accent);
            margin-right: 4px;
        }
        @media (max-width: 640px) {
            .rank__item {
                flex-wrap: wrap;
                gap: 8px;
                padding: 12px 16px;
            }
            .rank__stats {
                width: 100%;
                justify-content: flex-start;
                gap: 12px;
                padding-left: 32px;
            }
        }

        /* ========== FAQ ========== */
        .faq__list {
            max-width: 740px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq__item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq__item.active {
            border-color: var(--color-primary-light);
        }
        .faq__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            background: none;
            border: none;
            text-align: left;
            cursor: pointer;
            transition: color var(--transition);
            gap: 16px;
        }
        .faq__question:hover {
            color: var(--color-primary);
        }
        .faq__question i {
            font-size: 0.85rem;
            color: var(--color-primary-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq__item.active .faq__question i {
            transform: rotate(180deg);
        }
        .faq__answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.7;
            display: none;
        }
        .faq__item.active .faq__answer {
            display: block;
        }
        @media (max-width: 640px) {
            .faq__question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq__answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
        }

        /* ========== CTA ========== */
        .cta__box {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-xl);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .cta__box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta__box * {
            position: relative;
            z-index: 1;
        }
        .cta__box h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta__box p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta__box .btn--cta {
            font-size: 1.05rem;
            padding: 14px 36px;
            background: #fff;
            color: var(--color-primary-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }
        .cta__box .btn--cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
            color: var(--color-primary-dark);
        }
        @media (max-width: 768px) {
            .cta__box {
                padding: 40px 24px;
                border-radius: var(--radius-lg);
            }
            .cta__box h2 {
                font-size: 1.5rem;
            }
            .cta__box p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .cta__box {
                padding: 32px 18px;
            }
            .cta__box h2 {
                font-size: 1.25rem;
            }
        }

        /* ========== Footer ========== */
        .footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 28px;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer__brand .header__logo {
            margin-bottom: 16px;
            color: #fff;
        }
        .footer__brand .header__logo i {
            color: var(--color-accent);
        }
        .footer__brand .header__logo span {
            background: linear-gradient(135deg, #fff, #c7d2fe);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer__brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer__heading {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer__links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer__links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition), transform var(--transition);
        }
        .footer__links a i {
            font-size: 0.65rem;
            color: var(--color-accent);
        }
        .footer__links a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .footer__bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer__bottom a {
            color: var(--color-accent-light);
            text-decoration: none;
        }
        .footer__bottom a:hover {
            color: #fff;
            text-decoration: underline;
        }
        @media (max-width: 1024px) {
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer__bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer {
                padding: 40px 0 20px;
            }
        }

        /* ========== 辅助工具 ========== */
        .text-center {
            text-align: center;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* 分类标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 24px;
        }
        .tag-cloud .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: 100px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-text-light);
            transition: all var(--transition);
            text-decoration: none;
        }
        .tag-cloud .tag:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-primary);
        }
        .tag-cloud .tag i {
            font-size: 0.8rem;
        }

        /* 分隔线装饰 */
        .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 4px;
            margin: 0 auto 20px;
        }

        /* 移动端微调 */
        @media (max-width: 480px) {
            .hero__badge {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
            .tag-cloud .tag {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }