/* roulang page: index */
:root {
    --color-primary: #2A6D8C;
    --color-primary-dark: #20536D;
    --color-primary-soft: #E7F1F6;
    --color-accent: #E07A54;
    --color-accent-soft: #FBE9E2;
    --color-bg: #F5F8FA;
    --color-card: #FFFFFF;
    --color-text: #1F2C38;
    --color-text-secondary: #5A6B7A;
    --color-border: #E3E9EE;
    --color-divider: #EEF2F5;
    --color-dark-bg: #1C2A35;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --shadow-card: 0 2px 10px rgba(43, 64, 90, 0.05);
    --shadow-hover: 0 12px 28px rgba(43, 64, 90, 0.10);
    --transition: 0.25s ease;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", Inter, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--color-primary-dark);
}
ul {
    list-style: none;
}
button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    padding: 12px 28px;
    font-size: 15px;
    line-height: 1.2;
    border: 2px solid transparent;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    white-space: nowrap;
}
.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}
.btn-primary:hover {
    background: #C9653F;
    border-color: #C9653F;
    color: #fff;
    box-shadow: 0 6px 18px rgba(224, 122, 84, 0.3);
    transform: translateY(-1px);
}
.btn-outline {
    background: transparent;
    color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-block {
    width: 100%;
}
.btn-lg {
    padding: 15px 36px;
    font-size: 16px;
}
/* ===== Header / Nav ===== */
.site-header {
    position: relative;
    z-index: 100;
    padding: 20px 0 0;
}
.nav-panel {
    background: #1E3D52;
    border-radius: var(--radius-lg);
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    box-shadow: 0 8px 24px rgba(30, 61, 82, 0.25);
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.nav-logo a {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.5px;
}
.nav-logo a i {
    color: var(--color-accent);
    font-size: 24px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    justify-content: center;
}
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 48px;
    padding: 0 18px;
    border-radius: var(--radius-md);
    color: rgba(255, 255, 255, 0.82);
    font-size: 15px;
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
}
.nav-link i {
    font-size: 17px;
}
.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}
.nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.nav-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.12);
    border: none;
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    font-size: 20px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}
.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.22);
}
/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 104px 0 96px;
    background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    margin-top: -16px;
    border-radius: 0 0 24px 24px;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(115deg, rgba(245, 248, 250, 0.98) 5%, rgba(231, 241, 246, 0.92) 50%, rgba(224, 237, 242, 0.4) 100%);
    border-radius: inherit;
}
.hero .container {
    position: relative;
    z-index: 2;
}
.hero-content {
    max-width: 640px;
}
.hero-title {
    font-size: clamp(30px, 4.5vw, 44px);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 22px;
}
.hero-subtitle {
    font-size: 17px;
    line-height: 1.75;
    color: var(--color-text-secondary);
    margin-bottom: 34px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 42px;
}
.hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}
.hero-trust span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.6);
    padding: 8px 16px;
    border-radius: 30px;
    box-shadow: var(--shadow-card);
}
.hero-trust i {
    color: var(--color-primary);
}
/* ===== Section base ===== */
.section {
    padding: 88px 0;
}
.section-header {
    text-align: center;
    margin-bottom: 52px;
}
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-soft);
    padding: 5px 14px;
    border-radius: 30px;
    letter-spacing: 1px;
    margin-bottom: 14px;
}
.section-title {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-text);
    position: relative;
    display: inline-block;
    margin-bottom: 12px;
}
.section-title::before {
    content: '';
    position: absolute;
    left: -14px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 28px;
    background: var(--color-primary);
    border-radius: 4px;
}
.section-subtitle {
    font-size: 15px;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}
/* ===== Stats / 指标看板 ===== */
.stats-section {
    padding: 70px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.stat-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--transition), transform var(--transition);
}
.stat-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--color-primary);
    border-radius: 4px;
}
.stat-number {
    font-family: "Inter", "Arial", sans-serif;
    font-size: 52px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.1;
    margin-bottom: 8px;
    letter-spacing: -1px;
}
.stat-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}
.stat-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}
/* ===== Services / 服务矩阵 ===== */
.services-section {
    background: #fff;
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.service-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 30px 26px;
    box-shadow: var(--shadow-card);
    transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}
.service-card-large {
    grid-column: span 2;
    display: flex;
    gap: 24px;
    padding: 36px;
    background: var(--color-primary-soft);
    border: 1px solid rgba(42, 109, 140, 0.15);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: box-shadow var(--transition), transform var(--transition);
}
.service-card-large:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}
.service-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-soft);
    border-radius: 12px;
    color: var(--color-primary);
    font-size: 20px;
    margin-bottom: 18px;
    transition: background var(--transition), color var(--transition);
}
.service-card-large .service-icon {
    background: #fff;
    color: var(--color-primary);
    width: 54px;
    height: 54px;
    font-size: 23px;
    border-radius: 14px;
    margin-bottom: 0;
}
.service-card-large:hover .service-icon {
    background: var(--color-primary);
    color: #fff;
}
.service-card-large .service-content {
    flex: 1;
}
.service-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
}
.service-desc {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 14px;
}
.service-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.service-more:hover {
    color: var(--color-primary-dark);
    gap: 9px;
}
.service-more i {
    font-size: 13px;
}
/* ===== Compare / 结果对比 ===== */
.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: stretch;
    position: relative;
}
.compare-card {
    border-radius: var(--radius-lg);
    padding: 40px 36px;
}
.compare-card.old {
    background: #F0F3F5;
    border: 1px solid #E3E9EE;
}
.compare-card.new {
    background: var(--color-primary-soft);
    border: 1px solid rgba(42, 109, 140, 0.2);
    box-shadow: var(--shadow-card);
}
.compare-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.compare-card.old .compare-title {
    color: #6E7B87;
}
.compare-card.new .compare-title {
    color: var(--color-primary);
}
.compare-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.compare-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text);
}
.compare-list li i {
    margin-top: 4px;
    font-size: 16px;
    flex-shrink: 0;
}
.compare-list li .fa-xmark {
    color: #A8B3BD;
}
.compare-list li .fa-check {
    color: #3AA673;
}
.compare-arrow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-card);
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 18px;
    box-shadow: var(--shadow-card);
    z-index: 2;
}
/* ===== News / 最新动态 ===== */
.news-section {
    background: #fff;
}
.news-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 36px;
}
.news-header .section-title {
    text-align: left;
    display: block;
    margin-bottom: 0;
}
.news-more {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.news-more:hover {
    gap: 10px;
}
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.post-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: box-shadow var(--transition), transform var(--transition);
}
.post-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}
.post-card-link {
    display: block;
    color: inherit;
}
.post-card-link:hover {
    color: inherit;
}
.post-cover {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--color-primary-soft);
}
.post-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.post-card:hover .post-cover img {
    transform: scale(1.03);
}
.post-body {
    padding: 24px 22px;
}
.post-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-soft);
    padding: 4px 12px;
    border-radius: 30px;
    margin-bottom: 12px;
}
.post-title {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--color-text);
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-title a {
    color: inherit;
}
.post-title a:hover {
    color: var(--color-primary);
}
.post-excerpt {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--color-text-secondary);
}
.post-more {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}
.post-more:hover {
    color: var(--color-primary-dark);
}
/* Empty state */
.news-empty {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: 60px 30px;
    text-align: center;
    background: #FAFCFD;
}
.news-empty i {
    font-size: 44px;
    color: #BFCDD6;
    margin-bottom: 16px;
}
.news-empty p {
    font-size: 16px;
    color: var(--color-text-secondary);
}
/* ===== FAQ ===== */
.faq-wrap {
    max-width: 860px;
    margin: 0 auto;
}
.faq-item {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    overflow: hidden;
    transition: border-color var(--transition);
}
.faq-item.active {
    border-color: var(--color-primary);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    cursor: pointer;
    user-select: none;
    transition: background var(--transition);
}
.faq-question:hover {
    background: #FAFCFD;
}
.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1.5px solid var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-primary);
    font-size: 14px;
    transition: transform var(--transition), background var(--transition), color var(--transition);
}
.faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: var(--color-primary);
    color: #fff;
}
.faq-answer {
    display: none;
    padding: 0 28px 24px 28px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    border-top: 1px solid var(--color-divider);
    padding-top: 16px;
}
.faq-item.active .faq-answer {
    display: block;
}
/* ===== Contact Form ===== */
.contact-section {
    background: var(--color-primary-soft);
    position: relative;
    overflow: hidden;
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}
.contact-info h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 18px;
    line-height: 1.4;
}
.contact-info p {
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}
.contact-points {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.contact-points li {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 15px;
    color: var(--color-text);
}
.contact-points li i {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #fff;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
    box-shadow: var(--shadow-card);
}
.contact-form-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: 0 12px 32px rgba(43, 64, 90, 0.1);
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}
.required {
    color: #D9534F;
    margin-left: 2px;
}
.form-control {
    width: 100%;
    height: 46px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0 16px;
    font-size: 15px;
    color: var(--color-text);
    background: #FAFCFD;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    outline: none;
}
.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(42, 109, 140, 0.12);
    background: #fff;
}
textarea.form-control {
    height: auto;
    padding: 12px 16px;
    resize: vertical;
    min-height: 96px;
}
.form-submit {
    margin-top: 8px;
}
/* ===== Footer ===== */
.site-footer {
    background: #1C2A35;
    color: rgba(255, 255, 255, 0.8);
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 48px;
}
.footer-brand .footer-logo {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}
.footer-brand .footer-logo i {
    color: var(--color-accent);
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.65);
    max-width: 260px;
}
.footer-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}
.footer-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-links a {
    color: rgba(255, 255, 255, 0.65);
    font-size: 14px;
    transition: color var(--transition), padding-left var(--transition);
}
.footer-links a:hover {
    color: #fff;
    padding-left: 6px;
}
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 14px;
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.65);
}
.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.footer-contact li i {
    color: var(--color-accent);
    margin-top: 4px;
    font-size: 14px;
    width: 18px;
    text-align: center;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}
/* ===== Responsive ===== */
@media (max-width: 1199px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 991px) {
    .nav-panel {
        flex-wrap: wrap;
        padding: 14px 18px;
    }
    .nav-links {
        order: 3;
        flex-basis: 100%;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding-top: 14px;
        margin-top: 14px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        gap: 6px;
    }
    .nav-links.open {
        display: flex;
    }
    .nav-link {
        height: 44px;
        justify-content: center;
    }
    .nav-toggle {
        display: inline-flex;
    }
    .hero {
        padding: 80px 0 70px;
    }
    .compare-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .compare-arrow {
        top: auto;
        left: 50%;
        transform: translateX(-50%);
        margin: -10px 0;
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 767px) {
    .section {
        padding: 56px 0;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }
    .service-card-large {
        grid-column: span 1;
        flex-direction: column;
        padding: 26px;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
    .hero {
        padding: 60px 0 52px;
    }
    .hero-actions {
        flex-direction: column;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .hero-trust {
        flex-direction: column;
        gap: 10px;
    }
    .contact-grid {
        gap: 28px;
    }
    .contact-form-card {
        padding: 24px 20px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}
@media (max-width: 520px) {
    .nav-panel {
        padding: 12px 14px;
    }
    .nav-logo a {
        font-size: 18px;
    }
    .compare-card {
        padding: 26px 20px;
    }
    .faq-question {
        padding: 18px 18px;
        font-size: 15px;
    }
    .faq-answer {
        padding: 0 18px 20px;
    }
    .form-control {
        font-size: 15px;
    }
}

/* roulang page: article */
:root {
    --color-primary: #2A6D8C;
    --color-primary-dark: #20536D;
    --color-primary-soft: #E7F1F6;
    --color-accent: #E07A54;
    --color-accent-soft: #FBE9E2;
    --color-bg: #F5F8FA;
    --color-card: #FFFFFF;
    --color-text: #1F2C38;
    --color-text-secondary: #5A6B7A;
    --color-border: #E3E9EE;
    --color-divider: #EEF2F5;
    --color-footer-bg: #1C2A35;
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --shadow-card: 0 2px 10px rgba(43, 64, 90, 0.05);
    --shadow-hover: 0 12px 28px rgba(43, 64, 90, 0.10);
    --shadow-nav: 0 8px 24px rgba(43, 64, 90, 0.08);
    --container-width: 1200px;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans SC', Inter, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

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

ul,
ol {
    padding-left: 1.5em;
}

/* ===== Header / Nav ===== */
.site-header {
    background: var(--color-primary-dark);
    padding: 18px 0;
    box-shadow: var(--shadow-nav);
    position: relative;
    z-index: 50;
}

.nav-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.nav-logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1px;
}

.nav-logo a i {
    font-size: 26px;
    color: var(--color-accent);
}

.nav-logo a:hover {
    color: #fff;
    opacity: 0.9;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    transition: background 0.25s ease, color 0.25s ease;
}

.nav-link i {
    font-size: 15px;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 24px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: #d16842;
    border-color: #d16842;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(224, 122, 84, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(42, 109, 140, 0.25);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    color: #fff;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: background 0.2s ease;
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* ===== Main / Article Layout ===== */
.article-main {
    padding: 60px 0 80px;
}

.article-wrapper {
    max-width: 960px;
    margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

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

.breadcrumb a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.breadcrumb i {
    font-size: 10px;
    color: #AAB5C0;
}

.breadcrumb span {
    display: inline-block;
    max-width: 320px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--color-text-secondary);
}

/* Article Card */
.article-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
    padding: 48px 56px;
    margin-bottom: 40px;
}

.article-header {
    margin-bottom: 28px;
}

.article-header h1 {
    font-size: clamp(30px, 4.5vw, 42px);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 18px;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.article-category {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-primary-soft);
    color: var(--color-primary);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
}

.meta-separator {
    color: #C0C9D2;
}

.article-meta i {
    margin-right: 4px;
    font-size: 13px;
}

/* Article Cover */
.article-cover {
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 36px;
    background: var(--color-primary-soft);
    aspect-ratio: 16 / 8;
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Article Content */
.article-content {
    max-width: 760px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.85;
    color: var(--color-text);
}

.article-content h2 {
    font-size: 26px;
    font-weight: 600;
    line-height: 1.4;
    margin: 36px 0 16px;
    padding-left: 14px;
    border-left: 4px solid var(--color-primary);
    color: var(--color-text);
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    margin: 28px 0 12px;
    color: var(--color-text);
}

.article-content p {
    margin-bottom: 20px;
}

.article-content a {
    color: var(--color-primary);
    border-bottom: 1px solid rgba(42, 109, 140, 0.3);
}

.article-content a:hover {
    border-bottom-color: var(--color-primary-dark);
}

.article-content ul,
.article-content ol {
    margin-bottom: 20px;
    padding-left: 1.6em;
}

.article-content li {
    margin-bottom: 8px;
}

.article-content blockquote {
    background: var(--color-primary-soft);
    border-left: 4px solid var(--color-primary);
    padding: 18px 22px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 24px 0;
    color: var(--color-text-secondary);
    font-size: 15px;
}

.article-content blockquote p:last-child {
    margin-bottom: 0;
}

.article-content img {
    border-radius: var(--radius-md);
    margin: 24px 0;
}

.article-content strong {
    font-weight: 600;
    color: var(--color-text);
}

/* Article Footer */
.article-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 28px;
    border-top: 1px solid var(--color-divider);
    margin-top: 40px;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.article-tag {
    display: inline-block;
    padding: 5px 14px;
    background: var(--color-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 13px;
    transition: all 0.2s ease;
}

.article-tag:hover {
    background: var(--color-primary-soft);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.article-share {
    display: flex;
    align-items: center;
    gap: 8px;
}

.share-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-right: 4px;
}

.share-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: all 0.25s ease;
}

.share-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(42, 109, 140, 0.25);
}

/* Recommend Section */
.recommend-section {
    margin-bottom: 40px;
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
}

.section-heading h2 {
    font-size: clamp(22px, 3vw, 28px);
    font-weight: 600;
    color: var(--color-text);
    position: relative;
    padding-left: 16px;
}

.section-heading h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 2px;
}

.recommend-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.recommend-card {
    display: flex;
    align-items: center;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
}

.recommend-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(42, 109, 140, 0.25);
}

.recommend-thumb {
    width: 150px;
    flex-shrink: 0;
    min-height: 100px;
    background: var(--color-primary-soft);
    overflow: hidden;
}

.recommend-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recommend-body {
    padding: 18px 24px;
    flex: 1;
}

.recommend-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.recommend-body h3:hover {
    color: var(--color-primary);
}

.recommend-date {
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* Article Bottom */
.article-bottom {
    display: flex;
    justify-content: center;
    margin: 40px 0 56px;
}

/* CTA Section */
.cta-section {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 48px;
    text-align: center;
}

.cta-section h2 {
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

.cta-section p {
    font-size: 15px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

/* Not Found */
.not-found-card {
    background: var(--color-card);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: 80px 40px;
    text-align: center;
}

.not-found-card i {
    font-size: 52px;
    color: #C0C9D2;
    margin-bottom: 20px;
}

.not-found-card h2 {
    font-size: 26px;
    font-weight: 600;
    margin-bottom: 12px;
}

.not-found-card p {
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--color-footer-bg);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-logo i {
    color: var(--color-accent);
    font-size: 24px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    max-width: 320px;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
    color: #fff;
    padding-left: 4px;
    text-decoration: underline;
}

.footer-contact {
    list-style: none;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact li i {
    width: 18px;
    text-align: center;
    color: var(--color-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 8px);
        left: 20px;
        right: 20px;
        background: var(--color-primary-dark);
        border-radius: var(--radius-md);
        padding: 16px;
        flex-direction: column;
        align-items: stretch;
        box-shadow: var(--shadow-nav);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .article-card {
        padding: 40px 36px;
    }

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

    .recommend-thumb {
        width: 130px;
    }
}

@media (max-width: 768px) {
    .article-main {
        padding: 40px 0 56px;
    }

    .article-card {
        padding: 28px 20px;
    }

    .article-cover {
        aspect-ratio: 16 / 10;
    }

    .article-content {
        font-size: 15px;
    }

    .article-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .cta-section {
        padding: 32px 20px;
    }

    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .cta-actions .btn {
        width: 100%;
    }
}

@media (max-width: 520px) {
    .article-header h1 {
        font-size: 28px;
    }

    .article-meta {
        gap: 6px;
        font-size: 13px;
    }

    .recommend-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .recommend-thumb {
        width: 100%;
        height: 120px;
    }

    .recommend-body {
        padding: 14px 18px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 4px;
    }

    .nav-logo a {
        font-size: 20px;
    }

    .btn {
        padding: 10px 18px;
        font-size: 14px;
    }
}

/* roulang page: category1 */
:root {
            --color-primary: #2A6D8C;
            --color-primary-dark: #20536D;
            --color-primary-soft: #E7F1F6;
            --color-accent: #E07A54;
            --color-accent-soft: #FBE9E2;
            --color-bg: #F5F8FA;
            --color-card: #FFFFFF;
            --color-text: #1F2C38;
            --color-text-secondary: #5A6B7A;
            --color-border: #E3E9EE;
            --color-divider: #EEF2F5;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 2px 10px rgba(43, 64, 90, 0.05);
            --shadow-hover: 0 12px 28px rgba(43, 64, 90, 0.10);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", Inter, Arial, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            font-size: 16px;
            line-height: 1.75;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            width: 100%;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 11px 14px;
            background: #fff;
            color: var(--color-text);
            transition: var(--transition);
        }
        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(42, 109, 140, 0.15);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: 80px 0;
        }
        .section-head {
            margin-bottom: 44px;
        }
        .section-tag {
            display: inline-block;
            background: var(--color-primary-soft);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 600;
            line-height: 1.4;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-head h2::before {
            content: "";
            width: 4px;
            height: 24px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .section-head p {
            color: var(--color-text-secondary);
            font-size: 15px;
            margin-top: 8px;
            max-width: 720px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(224, 122, 84, 0.3);
        }
        .btn-primary:hover {
            background: #C9653F;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(224, 122, 84, 0.35);
        }
        .btn-outline {
            border: 1.5px solid rgba(255, 255, 255, 0.85);
            color: #fff;
        }
        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.12);
        }
        .btn-dark-outline {
            border: 1.5px solid var(--color-primary-dark);
            color: var(--color-primary-dark);
        }
        .btn-dark-outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-1px);
        }

        /* ===== Header / Nav Panel ===== */
        .site-header {
            padding-top: 20px;
        }
        .nav-panel {
            background: var(--color-primary-dark);
            border-radius: var(--radius-lg);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 8px 24px rgba(43, 64, 90, 0.10);
        }
        .nav-logo a {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .nav-logo i {
            font-size: 22px;
            color: #A8CDE0;
        }
        .nav-links {
            display: flex;
            gap: 4px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
        }
        .nav-link i {
            font-size: 14px;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .nav-link.active {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .nav-actions .btn {
            padding: 10px 20px;
            font-size: 14px;
        }
        .nav-toggle {
            display: none;
            color: #fff;
            font-size: 20px;
            padding: 6px;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            margin-top: 24px;
            border-radius: var(--radius-lg);
            padding: 72px 48px;
            color: #fff;
            position: relative;
            overflow: hidden;
            background: linear-gradient(100deg, rgba(31, 59, 78, 0.93) 0%, rgba(42, 109, 140, 0.82) 60%, rgba(42, 109, 140, 0.55) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }
        .banner-content .crumb {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .banner-content .crumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .banner-content .crumb a:hover {
            color: #fff;
        }
        .banner-content h1 {
            font-size: clamp(30px, 4.5vw, 44px);
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .banner-content p.desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
            max-width: 600px;
        }
        .banner-ctas {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .banner-side {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .banner-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-top: 8px;
        }
        .metric-mini {
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: var(--radius-md);
            padding: 16px 14px;
            text-align: center;
            backdrop-filter: none;
        }
        .metric-mini strong {
            display: block;
            font-size: 26px;
            font-weight: 700;
            font-family: Inter, Arial, sans-serif;
            color: #fff;
        }
        .metric-mini span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.85);
        }

        /* ===== Content Band ===== */
        .content-band {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 52px;
            align-items: center;
        }
        .content-band.reverse .band-media {
            order: 2;
        }
        .band-media {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .band-media img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .band-content h3 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 12px;
            Line-height: 1.4;
        }
        .band-content>p {
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .band-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-bottom: 24px;
        }
        .band-features li {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 12px 14px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: var(--shadow-card);
        }
        .band-features li i {
            color: var(--color-primary);
            width: 18px;
            text-align: center;
        }

        /* ===== Capability Grid ===== */
        .capability-section {
            background: var(--color-card);
            border-top: 1px solid var(--color-divider);
            border-bottom: 1px solid var(--color-divider);
        }
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .capability-card {
            padding: 32px 28px;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .capability-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(42, 109, 140, 0.3);
        }
        .capability-icon {
            width: 52px;
            height: 52px;
            background: var(--color-primary-soft);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-primary);
            margin-bottom: 20px;
        }
        .capability-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .capability-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* ===== Process ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .process-step {
            position: relative;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 22px 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .step-num {
            font-family: Inter, Arial, sans-serif;
            font-size: 42px;
            font-weight: 700;
            color: var(--color-primary-soft);
            line-height: 1;
            margin-bottom: 14px;
        }
        .step-arrow {
            position: absolute;
            right: -14px;
            top: 50%;
            transform: translateY(-50%);
            width: 28px;
            height: 28px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            z-index: 2;
            box-shadow: 0 2px 6px rgba(42, 109, 140, 0.3);
        }
        .process-step:last-child .step-arrow {
            display: none;
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        /* ===== Projects ===== */
        .projects-section {
            background: var(--color-card);
            border-top: 1px solid var(--color-divider);
            border-bottom: 1px solid var(--color-divider);
        }
        .project-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .project-card {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 24px;
            padding: 20px;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: var(--transition);
            align-items: center;
        }
        .project-card:hover {
            border-color: rgba(42, 109, 140, 0.35);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .project-thumb img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-md);
        }
        .project-tags {
            display: flex;
            gap: 8px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .project-tags span {
            font-size: 12px;
            background: var(--color-primary-soft);
            color: var(--color-primary);
            padding: 4px 10px;
            border-radius: 999px;
            font-weight: 500;
        }
        .project-info h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .project-info p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .text-link {
            color: var(--color-primary);
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .text-link:hover {
            color: var(--color-primary-dark);
            gap: 9px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.active {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 1px rgba(42, 109, 140, 0.2), var(--shadow-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            gap: 20px;
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--color-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 14px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.active .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer p {
            padding: 0 24px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-secondary);
        }

        /* ===== CTA / Form ===== */
        .cta-section {
            padding: 80px 0;
        }
        .cta-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            background: var(--color-card);
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: var(--shadow-hover);
            align-items: center;
        }
        .cta-info h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 14px;
        }
        .cta-info p {
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .cta-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 20px;
        }
        .cta-contact li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--color-text-secondary);
        }
        .cta-contact i {
            width: 36px;
            height: 36px;
            background: var(--color-primary-soft);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
        }
        .cta-form {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 6px;
        }
        .form-group label .required {
            color: var(--color-accent);
        }
        .form-group select {
            appearance: none;
            background: #fff url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235A6B7A' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 12px center;
            background-size: 16px;
            padding-right: 36px;
        }
        .form-group textarea {
            min-height: 80px;
            resize: vertical;
        }
        .cta-form .btn {
            width: 100%;
            margin-top: 6px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 24px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-logo i {
            color: #A8CDE0;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            opacity: 0.8;
            max-width: 300px;
        }
        .footer-col .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            opacity: 0.8;
        }
        .footer-links a:hover {
            color: #fff;
            opacity: 1;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-contact li {
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
            opacity: 0.85;
        }
        .footer-contact i {
            width: 16px;
            text-align: center;
            color: #A8CDE0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            opacity: 0.7;
            flex-wrap: wrap;
            gap: 10px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 0;
                right: 0;
                background: var(--color-primary-dark);
                border-radius: var(--radius-lg);
                padding: 16px;
                flex-direction: column;
                gap: 8px;
                box-shadow: 0 16px 32px rgba(31, 59, 78, 0.25);
                z-index: 100;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-panel {
                position: relative;
            }
            .page-banner {
                grid-template-columns: 1fr;
                padding: 48px 32px;
            }
            .banner-metrics {
                grid-template-columns: repeat(3, 1fr);
            }
            .content-band {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .content-band.reverse .band-media {
                order: 0;
            }
            .capability-grid {
                grid-template-columns: 1fr 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-arrow {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-wrap {
                grid-template-columns: 1fr;
                padding: 32px 24px;
                gap: 32px;
            }
        }

        @media (max-width: 767px) {
            .section {
                padding: 48px 0;
            }
            .site-header {
                padding-top: 12px;
            }
            .nav-panel {
                padding: 10px 14px;
            }
            .nav-logo a {
                font-size: 17px;
            }
            .nav-actions .btn {
                display: none;
            }
            .page-banner {
                padding: 36px 20px;
                border-radius: var(--radius-md);
            }
            .banner-ctas {
                flex-direction: column;
            }
            .banner-ctas .btn {
                width: 100%;
            }
            .banner-metrics {
                grid-template-columns: 1fr;
            }
            .band-media img {
                height: 220px;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .project-card {
                grid-template-columns: 1fr;
            }
            .project-thumb img {
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-question {
                padding: 18px 16px;
                font-size: 15px;
            }
            .cta-wrap {
                padding: 24px 16px;
            }
            .cta-form {
                padding: 20px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #2A6D8C;
            --color-primary-dark: #20536D;
            --color-primary-soft: #E7F1F6;
            --color-accent: #E07A54;
            --color-accent-soft: #FBE9E2;
            --color-bg: #F5F8FA;
            --color-card: #FFFFFF;
            --color-text: #1F2C38;
            --color-text-secondary: #5A6B7A;
            --color-border: #E3E9EE;
            --color-divider: #EEF2F5;
            --shadow-default: 0 2px 10px rgba(43, 64, 90, 0.05);
            --shadow-hover: 0 12px 28px rgba(43, 64, 90, 0.10);
            --shadow-nav: 0 8px 24px rgba(43, 64, 90, 0.08);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Inter", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        /* 容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(224, 122, 84, 0.25);
        }

        .btn-primary:hover {
            background-color: #C96440;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(224, 122, 84, 0.32);
        }

        .btn-outline {
            background: transparent;
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        .btn-outline:hover {
            border-color: var(--color-primary-dark);
            color: var(--color-primary-dark);
            background: rgba(42, 109, 140, 0.04);
        }

        .btn-white {
            background: #fff;
            color: var(--color-primary-dark);
        }

        .btn-white:hover {
            background: var(--color-primary-soft);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
        }

        /* 分类标签 */
        .tag-badge {
            display: inline-block;
            padding: 4px 14px;
            background: var(--color-primary-soft);
            color: var(--color-primary-dark);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            line-height: 1.6;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: transparent;
            padding: 16px 0 0;
        }

        .nav-panel {
            display: flex;
            align-items: center;
            gap: 28px;
            background: var(--color-primary-dark);
            border-radius: var(--radius-lg);
            padding: 14px 24px;
            box-shadow: var(--shadow-nav);
        }

        .nav-logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .nav-logo i {
            font-size: 20px;
            color: var(--color-accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            flex-wrap: wrap;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
        }

        .nav-link i {
            font-size: 14px;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
        }

        .nav-link.active {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 22px;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* 移动端导航 */
        @media (max-width: 991px) {
            .site-header {
                padding: 12px 0 0;
            }

            .nav-panel {
                flex-wrap: wrap;
                gap: 10px;
                padding: 12px 16px;
            }

            .nav-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                gap: 4px;
                padding-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.15);
            }

            .nav-links.open {
                display: flex;
            }

            .nav-link {
                padding: 12px 16px;
            }

            .nav-actions {
                margin-left: 0;
            }

            .nav-actions .btn-primary {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

        /* ========== 分类横幅 ========== */
        .category-hero {
            position: relative;
            padding: 80px 0 100px;
            background: linear-gradient(135deg, rgba(231, 241, 246, 0.9) 0%, rgba(255, 255, 255, 0.65) 50%, rgba(231, 241, 246, 0.4) 100%),
                        url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-bottom: 1px solid var(--color-border);
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--color-bg), transparent);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 36px;
        }

        .breadcrumb a {
            color: var(--color-text-secondary);
            transition: color 0.2s;
        }

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

        .breadcrumb .separator {
            color: rgba(0, 0, 0, 0.25);
        }

        .category-hero-wrap {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 60px;
            align-items: center;
        }

        .category-hero-content h1 {
            font-size: clamp(30px, 4.5vw, 44px);
            font-weight: 600;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 20px;
        }

        .category-hero-content h1 .highlight {
            color: var(--color-primary);
        }

        .category-hero-content p {
            font-size: 16px;
            line-height: 1.85;
            color: var(--color-text-secondary);
            margin-bottom: 32px;
            max-width: 560px;
        }

        .category-hero-cta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-trust-points {
            display: flex;
            gap: 24px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .trust-point {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-secondary);
            background: rgba(255, 255, 255, 0.8);
            padding: 8px 16px;
            border-radius: 30px;
            border: 1px solid rgba(42, 109, 140, 0.12);
            box-shadow: 0 2px 8px rgba(43, 64, 90, 0.04);
        }

        .trust-point i {
            color: var(--color-primary);
            font-size: 15px;
        }

        .category-hero-media {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .category-hero-media img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            border-radius: 20px;
        }

        .category-hero-media::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(42, 109, 140, 0.06) 0%, rgba(32, 83, 109, 0.15) 100%);
            border-radius: 20px;
            pointer-events: none;
        }

        /* ========== 锚点内容区 ========== */
        .category-main {
            padding: 80px 0;
        }

        .category-main-layout {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 56px;
            align-items: start;
        }

        .category-sidebar {
            position: sticky;
            top: 120px;
            background: var(--color-card);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-default);
            border: 1px solid var(--color-border);
        }

        .side-nav-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--color-divider);
        }

        .side-nav-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .side-nav-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all 0.2s ease;
            border-left: 3px solid transparent;
        }

        .side-nav-link i {
            font-size: 14px;
            width: 20px;
            text-align: center;
            color: var(--color-primary);
            opacity: 0.7;
            transition: opacity 0.2s;
        }

        .side-nav-link:hover {
            background: var(--color-primary-soft);
            color: var(--color-primary-dark);
        }

        .side-nav-link.active {
            background: var(--color-primary-soft);
            color: var(--color-primary-dark);
            border-left-color: var(--color-primary);
            font-weight: 600;
        }

        .side-nav-link.active i {
            opacity: 1;
        }

        .category-content {
            display: flex;
            flex-direction: column;
            gap: 64px;
        }

        .content-block {
            scroll-margin-top: 110px;
        }

        .content-block-head {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 20px;
        }

        .content-block-icon {
            width: 48px;
            height: 48px;
            background: var(--color-primary-soft);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .content-block h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
            border-left: 4px solid var(--color-primary);
            padding-left: 16px;
        }

        .content-block-desc {
            font-size: 16px;
            color: var(--color-text-secondary);
            line-height: 1.85;
            margin-bottom: 24px;
        }

        .content-block-body p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-secondary);
            margin-bottom: 16px;
        }

        .feature-list {
            margin: 20px 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--color-text);
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 10px;
            padding: 14px 16px;
            transition: all 0.2s ease;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
        }

        .feature-list li:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-default);
        }

        .feature-list li i {
            color: var(--color-primary);
            font-size: 14px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .block-image {
            margin: 28px 0 8px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-default);
        }

        .block-image img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            transition: transform 0.4s ease;
        }

        .block-image:hover img {
            transform: scale(1.02);
        }

        .block-image figcaption {
            font-size: 13px;
            color: var(--color-text-secondary);
            text-align: center;
            padding: 12px;
            background: #fff;
            border-top: 1px solid var(--color-divider);
        }

        /* ========== 项目实践 ========== */
        .project-section {
            padding: 80px 0;
            background: var(--color-card);
            border-top: 1px solid var(--color-border);
        }

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

        .section-header .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
            padding: 4px 14px;
            background: var(--color-primary-soft);
            border-radius: 20px;
        }

        .section-header h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-text);
            border-left: 4px solid var(--color-primary);
            padding-left: 16px;
        }

        .project-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .project-card {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 0;
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all 0.3s ease;
        }

        .project-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(42, 109, 140, 0.25);
        }

        .project-card-media {
            position: relative;
            overflow: hidden;
            min-height: 220px;
        }

        .project-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            top: 0;
            left: 0;
        }

        .project-card-body {
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .project-card-body .tag-badge {
            align-self: flex-start;
            margin-bottom: 14px;
        }

        .project-card-body h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .project-card-body p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .project-metrics {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .project-metric {
            display: flex;
            flex-direction: column;
        }

        .project-metric .value {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-primary);
            font-family: "Inter", Arial, sans-serif;
            letter-spacing: -0.5px;
        }

        .project-metric .label {
            font-size: 13px;
            color: var(--color-text-secondary);
            margin-top: 2px;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 80px 0;
            background: var(--color-bg);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 12px;
            padding: 24px 28px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(42, 109, 140, 0.2);
            box-shadow: var(--shadow-default);
        }

        .faq-item.open {
            border-color: var(--color-primary);
            box-shadow: 0 4px 16px rgba(42, 109, 140, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .faq-question-text {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
            transition: all 0.3s ease;
        }

        .faq-item.open .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 32px 0 0;
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding-top: 16px;
            padding-bottom: 4px;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: var(--color-primary-dark);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -120px;
            left: -80px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(224, 122, 84, 0.1);
            pointer-events: none;
        }

        .cta-box {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-box h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 600;
            color: #fff;
            line-height: 1.4;
        }

        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 10px;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 64px 0 0;
            border-top: 4px solid rgba(224, 122, 84, 0.4);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 0.9fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-brand .footer-logo i {
            color: var(--color-accent);
            font-size: 22px;
        }

        .footer-brand p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.7);
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
            padding-top: 4px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: #fff;
            text-decoration: underline;
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-contact li i {
            color: var(--color-accent);
            font-size: 14px;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            padding: 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            flex-wrap: wrap;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1199px) {
            .category-hero-wrap {
                grid-template-columns: 1fr 0.9fr;
                gap: 40px;
            }

            .category-main-layout {
                grid-template-columns: 220px 1fr;
                gap: 40px;
            }

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

        @media (max-width: 991px) {
            .category-hero {
                padding: 56px 0 80px;
            }

            .category-hero-wrap {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .category-hero-media img {
                height: 260px;
            }

            .category-main-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .category-sidebar {
                position: static;
                top: auto;
                width: 100%;
            }

            .side-nav-list {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 8px;
            }

            .side-nav-link {
                padding: 10px 16px;
                border-left: none;
                border-bottom: 3px solid transparent;
                border-radius: 8px;
            }

            .side-nav-link.active {
                border-left: none;
                border-bottom-color: var(--color-primary);
            }

            .side-nav-title {
                display: none;
            }

            .feature-list {
                grid-template-columns: 1fr 1fr;
            }

            .block-image img {
                height: 240px;
            }

            .project-card {
                grid-template-columns: 220px 1fr;
            }

            .project-card-body {
                padding: 24px;
            }

            .project-metrics {
                gap: 20px;
            }

            .cta-box {
                flex-direction: column;
                align-items: flex-start;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 40px 0 60px;
            }

            .category-hero-content h1 {
                font-size: 28px;
                line-height: 1.35;
            }

            .category-hero-content p {
                font-size: 15px;
            }

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

            .category-hero-cta .btn {
                width: 100%;
            }

            .hero-trust-points {
                flex-direction: column;
                gap: 12px;
            }

            .trust-point {
                width: 100%;
            }

            .category-main {
                padding: 48px 0;
            }

            .category-main-layout {
                gap: 20px;
            }

            .content-block-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .content-block h2 {
                font-size: 22px;
                padding-left: 12px;
            }

            .content-block-desc {
                font-size: 15px;
            }

            .feature-list {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .block-image img {
                height: 200px;
            }

            .project-section {
                padding: 48px 0;
            }

            .project-card {
                grid-template-columns: 1fr;
            }

            .project-card-media {
                min-height: 200px;
                position: relative;
            }

            .project-card-media img {
                position: static;
                width: 100%;
            }

            .project-card-body {
                padding: 24px 20px;
            }

            .project-metrics {
                gap: 16px;
            }

            .project-metric .value {
                font-size: 24px;
            }

            .faq-section {
                padding: 48px 0;
            }

            .faq-item {
                padding: 20px;
            }

            .cta-section {
                padding: 48px 0;
            }

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

            .cta-actions .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

        @media (max-width: 520px) {
            .nav-panel {
                padding: 10px 14px;
            }

            .nav-logo a {
                font-size: 18px;
            }

            .nav-logo i {
                font-size: 16px;
            }

            .nav-actions .btn-primary {
                padding: 8px 14px;
                font-size: 13px;
            }

            .category-hero-content h1 {
                font-size: 24px;
            }

            .category-hero-media img {
                height: 200px;
            }

            .side-nav-link {
                font-size: 14px;
                padding: 8px 12px;
            }

            .faq-question-text {
                font-size: 15px;
            }

            .block-image img {
                height: 180px;
            }
        }