/* roulang page: index */
:root {
    --primary: #1E5F74;
    --primary-dark: #174A5A;
    --primary-light: #5C8A99;
    --accent: #E86A3E;
    --accent-hover: #D4592F;
    --accent-bg: #FFF0EA;
    --bg: #F7F9FB;
    --card: #FFFFFF;
    --band: #EEF3F7;
    --footer-bg: #0F2A3A;
    --text: #1A2B3C;
    --text-secondary: #4A5B6A;
    --text-muted: #8A9AA8;
    --border: #E3E9EF;
    --success: #2F9E6E;
    --warning: #D99A28;
    --radius: 14px;
    --radius-btn: 999px;
    --shadow: 0 2px 8px rgba(20,40,60,0.06);
    --shadow-hover: 0 10px 24px rgba(20,40,60,0.10);
    --container: 1140px;
    --space-desktop: 96px;
    --space-mobile: 64px;
    --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", "Noto Sans SC", system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

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

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

input, textarea {
    font-family: inherit;
}

ul, ol {
    list-style: none;
}

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

/* ===== Header 悬浮胶囊导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    padding: 14px 20px 0;
    pointer-events: none;
}

.nav-bar {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255,255,255,0.86);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border: 1px solid rgba(227,233,239,0.85);
    border-radius: 999px;
    padding: 10px 24px;
    box-shadow: var(--shadow);
    pointer-events: auto;
}

.logo {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.3px;
    white-space: nowrap;
}

.logo-dot {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0 16px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 999px;
    position: relative;
    transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(30,95,116,0.06);
}

.nav-link.active {
    color: var(--primary);
    font-weight: 600;
    background: rgba(30,95,116,0.10);
}

.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 3px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 4px;
    border-radius: 4px;
    background: var(--primary);
    opacity: 0.25;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-btn);
    padding: 12px 28px;
    transition: all var(--transition);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(232,106,62,0.28);
}

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

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 10px 26px;
}

.btn-secondary:hover {
    background: rgba(30,95,116,0.05);
    color: var(--primary);
}

.nav-cta {
    padding: 9px 22px;
    font-size: 0.88rem;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    background: var(--accent-bg);
    color: var(--accent);
    font-size: 1.2rem;
}

/* ===== Hero 首屏 ===== */
.hero {
    background: linear-gradient(135deg, #F4F7FA 0%, #EAF1F6 100%);
    padding: 160px 0 96px;
    position: relative;
    overflow: hidden;
}

.hero-inner {
    display: flex;
    align-items: center;
    gap: 64px;
}

.hero-content {
    flex: 1;
    flex-shrink: 0;
    min-width: 0;
}

.hero-content h1 {
    font-size: clamp(1.8rem, 3.2vw, 2.6rem);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.hero-sub {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 480px;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-link {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--primary);
    border-bottom: 1px solid rgba(30,95,116,0.3);
    padding-bottom: 2px;
    transition: border-color var(--transition);
}

.hero-link:hover {
    border-color: var(--primary);
}

.hero-badges {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.hero-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.hero-badge svg {
    width: 16px;
    height: 16px;
    color: var(--primary);
    flex-shrink: 0;
}

.hero-visual {
    flex: 1;
    flex-shrink: 0;
    min-width: 0;
}

.hero-visual img {
    border-radius: 18px;
    box-shadow: var(--shadow-hover);
    border: 1px solid var(--border);
    width: 100%;
    height: auto;
}

/* ===== 卖点三连 ===== */
.features {
    padding: var(--space-desktop) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 32px 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

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

.feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--accent-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 26px;
    height: 26px;
    color: var(--accent);
}

.feature-card h3 {
    font-size: 1.12rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}

.feature-card p {
    font-size: 0.93rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* ===== 场景演示区 ===== */
.scenarios {
    padding: var(--space-desktop) 0;
    background: var(--card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.scenario-row {
    display: flex;
    align-items: center;
    gap: 64px;
    margin-bottom: 80px;
}

.scenario-row:last-child {
    margin-bottom: 0;
}

.scenario-row.reverse {
    flex-direction: row-reverse;
}

.scenario-image {
    flex: 1;
    min-width: 0;
}

.scenario-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.scenario-content {
    flex: 1;
    min-width: 0;
}

.scenario-content .tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--primary);
    background: rgba(30,95,116,0.08);
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 16px;
    letter-spacing: 0.3px;
}

.scenario-content h2 {
    font-size: clamp(1.4rem, 2.2vw, 1.8rem);
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 14px;
}

.scenario-content > p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.scenario-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.93rem;
    color: var(--text);
    margin-bottom: 12px;
}

.scenario-list li svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    padding: 4px;
    margin-top: 2px;
}

/* ===== 资讯列表区 ===== */
.news-section {
    padding: var(--space-desktop) 0;
    background: var(--bg);
}

.news-section .section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 40px;
}

.section-header h2 {
    font-size: clamp(1.4rem, 2.2vw, 1.8rem);
    font-weight: 600;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

.news-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--card);
    border-radius: var(--radius);
    padding: 18px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

.news-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.news-thumb {
    width: 96px;
    height: 96px;
    flex-shrink: 0;
    border-radius: 10px;
    overflow: hidden;
    background: var(--band);
}

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

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

.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 6px;
}

.badge {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary);
    background: rgba(30,95,116,0.10);
    padding: 3px 10px;
    border-radius: 6px;
    letter-spacing: 0.2px;
}

.news-meta time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.news-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    line-height: 1.5;
}

.news-content h3 a:hover {
    color: var(--primary);
}

.news-content p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
}

.read-more {
    font-size: 0.82rem;
    color: var(--primary);
    font-weight: 500;
}

.read-more:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    background: var(--card);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    gap: 16px;
}

.empty-state svg {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    opacity: 0.5;
}

.empty-state p {
    font-size: 0.95rem;
}

/* ===== 社会认同区 ===== */
.social-proof {
    background: var(--band);
    padding: var(--space-desktop) 0;
}

.proof-inner {
    display: flex;
    align-items: center;
    gap: 64px;
}

.proof-stats {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.3;
}

.stat-label {
    font-size: 0.83rem;
    color: var(--text-muted);
    margin-top: 6px;
}

.proof-quote {
    flex: 1;
    background: var(--card);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    position: relative;
}

.proof-quote::before {
    content: "\201C";
    position: absolute;
    top: 8px;
    left: 24px;
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.15;
    line-height: 1;
    font-family: Georgia, serif;
}

.proof-quote blockquote {
    font-size: 0.98rem;
    line-height: 1.85;
    color: var(--text);
    margin-bottom: 20px;
    padding-top: 12px;
}

.quote-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.quote-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--accent-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-weight: 700;
    font-size: 1rem;
}

.quote-info .name {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text);
}

.quote-info .role {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== FAQ 区 ===== */
.faq {
    padding: var(--space-desktop) 0;
    background: var(--bg);
}

.faq h2 {
    text-align: center;
    font-size: clamp(1.4rem, 2.2vw, 1.8rem);
    font-weight: 600;
    margin-bottom: 40px;
}

.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.faq-item.open {
    border-left: 3px solid var(--primary);
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    gap: 16px;
}

.faq-question .icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--band);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.2s ease, background 0.2s ease;
    font-size: 1rem;
    font-weight: 400;
}

.faq-item.open .faq-question .icon {
    background: var(--primary);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 24px 20px;
    font-size: 0.93rem;
    line-height: 1.75;
    color: var(--text-secondary);
}

/* ===== 底部固定转化条 ===== */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 900;
    background: rgba(255,255,255,0.95);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border);
    padding: 12px 20px;
    box-shadow: 0 -4px 16px rgba(20,40,60,0.06);
}

.sticky-cta-inner {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.sticky-cta p {
    font-size: 0.92rem;
    color: var(--text);
    font-weight: 500;
}

.sticky-cta p span {
    color: var(--primary);
    font-weight: 600;
}

.sticky-cta .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
    flex-shrink: 0;
}

body {
    padding-bottom: 72px;
}

/* ===== Footer 页脚 ===== */
.site-footer {
    background: var(--footer-bg);
    color: rgba(255,255,255,0.7);
    padding: 64px 0 28px;
    position: relative;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.2fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 12px;
    display: inline-block;
}

.footer-brand .logo-dot {
    color: var(--accent);
}

.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.75;
    margin-top: 12px;
    max-width: 280px;
}

.footer-col h4 {
    color: #fff;
    font-size: 0.98rem;
    font-weight: 600;
    margin-bottom: 18px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: rgba(255,255,255,0.7);
    font-size: 0.88rem;
    transition: color var(--transition);
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-contact li {
    font-size: 0.88rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-contact svg {
    width: 16px;
    height: 16px;
    color: var(--primary-light);
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.45);
}

/* ===== 响应式断点 ===== */
@media (max-width: 1024px) {
    .hero-inner {
        gap: 40px;
    }
    .scenario-row {
        gap: 40px;
    }
    .proof-inner {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 76px;
        left: 16px;
        right: 16px;
        background: var(--card);
        border-radius: 16px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-hover);
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        gap: 4px;
        display: none;
        z-index: 998;
    }
    .nav-links.open {
        display: flex;
    }
    .nav-link {
        padding: 12px 16px;
        text-align: center;
        font-size: 0.95rem;
    }
    .nav-link.active::after {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }
    .nav-cta {
        display: none;
    }
    .hero {
        padding: 140px 0 64px;
    }
    .hero-inner {
        flex-direction: column;
    }
    .hero-content {
        text-align: center;
    }
    .hero-sub {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions {
        justify-content: center;
    }
    .hero-badges {
        justify-content: center;
    }
    .hero-visual {
        order: 2;
        margin-top: 8px;
    }
    .features {
        padding: 64px 0;
    }
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .scenarios {
        padding: 64px 0;
    }
    .scenario-row, .scenario-row.reverse {
        flex-direction: column;
        gap: 24px;
        margin-bottom: 56px;
    }
    .scenario-row:last-child {
        margin-bottom: 0;
    }
    .news-section {
        padding: 64px 0;
    }
    .news-card {
        flex-direction: column;
        align-items: flex-start;
    }
    .news-thumb {
        width: 100%;
        height: 160px;
    }
    .news-thumb img {
        object-fit: cover;
    }
    .social-proof {
        padding: 64px 0;
    }
    .proof-inner {
        flex-direction: column;
    }
    .proof-stats {
        width: 100%;
    }
    .proof-quote {
        width: 100%;
    }
    .faq {
        padding: 64px 0;
    }
    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer-brand p {
        max-width: 100%;
    }
}

@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .site-header {
        padding: 10px 12px 0;
    }
    .nav-bar {
        padding: 8px 16px;
    }
    .logo {
        font-size: 1.05rem;
    }
    .hero {
        padding: 120px 0 56px;
    }
    .hero-sub {
        font-size: 0.95rem;
    }
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    .hero-badges {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px 20px;
    }
    .proof-stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .stat-number {
        font-size: 1.6rem;
    }
    .sticky-cta p {
        font-size: 0.8rem;
    }
    .sticky-cta p span {
        display: block;
    }
    .sticky-cta .btn {
        padding: 8px 18px;
        font-size: 0.85rem;
    }
    .section-header {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
    .faq-question {
        padding: 16px 18px;
        font-size: 0.92rem;
    }
    .faq-answer p {
        padding: 0 18px 16px;
    }
}

/* FOCUS 状态 */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 6px;
}

/* 滚动条（可选美化） */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 8px;
}

/* roulang page: category1 */
:root {
            --primary: #1E5F74;
            --primary-dark: #174A5A;
            --primary-light: #5C8A99;
            --accent: #E86A3E;
            --accent-hover: #D4592F;
            --accent-bg: #FFF0EA;
            --bg: #F7F9FB;
            --bg-alt: #EEF3F7;
            --card-bg: #FFFFFF;
            --text: #1A2B3C;
            --text-secondary: #4A5B6A;
            --text-muted: #8A9AA8;
            --border: #E3E9EF;
            --footer-bg: #0F2A3A;
            --radius-card: 14px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --shadow-sm: 0 2px 8px rgba(20, 40, 60, 0.06);
            --shadow-md: 0 10px 24px rgba(20, 40, 60, 0.10);
            --container-width: 1140px;
            --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", "Noto Sans SC", system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .container-sm {
            max-width: 780px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            padding: 16px 20px 0;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(227, 233, 239, 0.5);
        }
        .nav-bar {
            max-width: var(--container-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(255, 255, 255, 0.95);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 10px 22px;
            box-shadow: 0 2px 12px rgba(20, 40, 60, 0.05);
        }
        .logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .logo-dot {
            color: var(--accent);
            font-size: 1.5rem;
            margin-left: 2px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            position: relative;
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 999px;
            white-space: nowrap;
            transition: color var(--transition), background var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 95, 116, 0.08);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 4px;
            border-radius: 4px;
            background: rgba(30, 95, 116, 0.5);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-size: 0.95rem;
            font-weight: 600;
            line-height: 1.2;
            transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(232, 106, 62, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: rgba(30, 95, 116, 0.06);
            transform: translateY(-1px);
        }
        .nav-cta {
            padding: 8px 22px;
            font-size: 0.9rem;
        }
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            color: var(--text);
            border: 1px solid var(--border);
            background: var(--card-bg);
            transition: background var(--transition), border-color var(--transition);
        }
        .menu-toggle:hover {
            background: var(--bg-alt);
            border-color: var(--primary-light);
        }
        .hero-section {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, #F4F7FA 0%, #EAF1F6 100%);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') right center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
            padding: 40px 20px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-bg);
            color: var(--accent-hover);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .hero-section h1 {
            font-size: clamp(1.8rem, 3.2vw, 2.6rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
        }
        .hero-section .hero-desc {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 28px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-actions .btn {
            padding: 14px 32px;
            font-size: 1rem;
        }
        .hero-meta {
            margin-top: 32px;
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-meta svg {
            width: 16px;
            height: 16px;
            color: var(--primary-light);
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.8rem);
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 14px;
        }
        .section-head p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 26px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(30, 95, 116, 0.25);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(30, 95, 116, 0.1);
            color: var(--primary);
            margin-bottom: 18px;
        }
        .feature-icon svg {
            width: 24px;
            height: 24px;
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .split-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
            margin-bottom: 64px;
        }
        .split-section:last-child {
            margin-bottom: 0;
        }
        .split-section.reverse {
            direction: rtl;
        }
        .split-section.reverse > * {
            direction: ltr;
        }
        .split-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            background: var(--card-bg);
        }
        .split-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }
        .split-content h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
            line-height: 1.4;
        }
        .split-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .split-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .split-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .split-list .check {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 2px;
        }
        .split-list .check svg {
            width: 11px;
            height: 11px;
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px 26px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .scenario-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-bg);
            color: var(--accent-hover);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .scenario-icon svg {
            width: 22px;
            height: 22px;
        }
        .scenario-card h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }
        .scenario-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        .steps-section {
            background: var(--footer-bg);
            color: #fff;
        }
        .steps-section .section-head h2 {
            color: #fff;
        }
        .steps-section .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .step-card {
            position: relative;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-card);
            padding: 32px 26px;
            transition: background var(--transition), transform var(--transition);
        }
        .step-card:hover {
            background: rgba(255, 255, 255, 0.11);
            transform: translateY(-3px);
        }
        .step-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 14px;
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.65;
        }
        .faq-section {
            background: var(--bg);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item.open {
            border-left: 3px solid var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: none;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.2s ease, background var(--transition);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent-bg);
            color: var(--accent-hover);
        }
        .faq-icon svg {
            width: 14px;
            height: 14px;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.75;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #F4F7FA 0%, #EAF1F6 100%);
        }
        .cta-box {
            max-width: 800px;
            margin: 0 auto;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 52px 48px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .cta-box h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.8rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
        }
        .cta-box p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 30px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .stay-tabs {
            position: sticky;
            bottom: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.96);
            border-top: 1px solid var(--border);
            padding: 12px 20px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .stay-tabs .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .stay-tabs p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .stay-tabs .btn {
            flex-shrink: 0;
        }
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo .logo-dot {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            margin-bottom: 18px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
        }
        .footer-contact svg {
            width: 16px;
            height: 16px;
            color: var(--accent);
            flex-shrink: 0;
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .back-home {
            text-align: center;
            padding: 32px 0 0;
        }
        .back-home a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--primary);
            font-weight: 500;
        }
        .back-home a:hover {
            color: var(--accent-hover);
        }
        .back-home svg {
            width: 16px;
            height: 16px;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .scenario-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .split-section {
                gap: 36px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-links.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: calc(100% + 8px);
                left: 20px;
                right: 20px;
                background: #fff;
                border: 1px solid var(--border);
                border-radius: 16px;
                padding: 16px;
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .nav-links.open .nav-link {
                padding: 12px 16px;
                border-radius: 10px;
                width: 100%;
                text-align: left;
            }
            .nav-links.open .nav-link.active::after {
                display: none;
            }
            .nav-links.open .nav-link.active {
                background: rgba(30, 95, 116, 0.08);
            }
            .nav-cta {
                display: none;
            }
            .hero-section {
                padding: 120px 0 50px;
            }
            .hero-section h1 {
                font-size: 1.8rem;
            }
            .hero-section .hero-desc {
                font-size: 0.95rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .split-section {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .split-section.reverse {
                direction: ltr;
            }
            .split-section.reverse > * {
                direction: ltr;
            }
            .split-media img {
                height: 220px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .stay-tabs p {
                font-size: 0.84rem;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .section {
                padding: 64px 0;
            }
        }
        @media (max-width: 640px) {
            .hero-meta {
                gap: 12px;
                flex-direction: column;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
                padding: 13px 24px;
            }
            .stay-tabs {
                padding: 10px 16px;
            }
            .stay-tabs .btn {
                padding: 9px 18px;
                font-size: 0.85rem;
            }
            .stay-tabs p {
                font-size: 0.78rem;
                line-height: 1.4;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            .nav-bar {
                padding: 8px 16px;
            }
            .logo {
                font-size: 1.05rem;
            }
            .feature-card {
                padding: 26px 20px;
            }
            .scenario-card {
                padding: 26px 20px;
            }
            .step-card {
                padding: 26px 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer p {
                font-size: 0.88rem;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-actions .btn {
                width: 100%;
                max-width: 260px;
            }
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --primary: #1E5F74;
            --primary-dark: #174A5A;
            --primary-light: #5C8A99;
            --accent: #E86A3E;
            --accent-hover: #D4592F;
            --accent-bg: #FFF0EA;
            --bg: #F7F9FB;
            --card: #FFFFFF;
            --blue-gray: #EEF3F7;
            --footer-bg: #0F2A3A;
            --text: #1A2B3C;
            --text-secondary: #4A5B6A;
            --text-muted: #8A9AA8;
            --border: #E3E9EF;
            --success: #2F9E6E;
            --warning: #D99A28;
            --radius-card: 14px;
            --radius-btn: 999px;
            --radius-input: 10px;
            --shadow-sm: 0 2px 8px rgba(20, 40, 60, 0.06);
            --shadow-md: 0 10px 24px rgba(20, 40, 60, 0.10);
            --transition: 0.25s ease;
            --container: 1140px;
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }

        /* ========== Reset & Base ========== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }
        input, textarea {
            font-family: inherit;
        }
        ul, ol {
            list-style-position: inside;
        }
        ::selection {
            background: rgba(30, 95, 116, 0.18);
            color: var(--primary-dark);
        }

        /* ========== 容器 ========== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }
        .container-narrow {
            max-width: 780px;
            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-btn);
            font-size: 0.95rem;
            font-weight: 600;
            line-height: 1.4;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(232, 106, 62, 0.24);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 106, 62, 0.30);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(232, 106, 62, 0.20);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-secondary:hover {
            background: rgba(30, 95, 116, 0.06);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 14px 36px;
            font-size: 1rem;
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.7);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ========== 徽章 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(30, 95, 116, 0.10);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            line-height: 1.5;
        }
        .badge-accent {
            background: var(--accent-bg);
            color: var(--accent);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 14px 16px;
            background: transparent;
            pointer-events: none;
        }
        .nav-bar {
            max-width: 1140px;
            margin: 0 auto;
            padding: 10px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: rgba(255, 255, 255, 0.92);
            border: 1px solid rgba(227, 233, 239, 0.85);
            border-radius: 999px;
            box-shadow: 0 2px 18px rgba(20, 40, 60, 0.08);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            pointer-events: auto;
            transition: box-shadow var(--transition), background var(--transition);
        }
        .nav-bar:hover {
            box-shadow: 0 4px 24px rgba(20, 40, 60, 0.10);
        }
        .logo {
            display: inline-flex;
            align-items: center;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo-dot {
            color: var(--accent);
            font-size: 1.5rem;
            line-height: 0;
            margin-left: 1px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
            flex-wrap: wrap;
        }
        .nav-link {
            position: relative;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 95, 116, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(30, 95, 116, 0.10);
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 4px;
            border-radius: 999px;
            background: rgba(30, 95, 116, 0.35);
        }
        .nav-cta {
            flex-shrink: 0;
            padding: 9px 22px;
            font-size: 0.88rem;
        }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 999px;
            align-items: center;
            justify-content: center;
            color: var(--text);
            background: rgba(30, 95, 116, 0.06);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(30, 95, 116, 0.12);
        }

        /* ========== 移动端导航 ========== */
        @media (max-width: 768px) {
            .site-header {
                padding: 10px 12px;
            }
            .nav-bar {
                padding: 8px 14px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 14px;
                background: #fff;
                border: 1px solid var(--border);
                border-radius: 18px;
                box-shadow: 0 12px 32px rgba(20, 40, 60, 0.12);
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                display: block;
                padding: 13px 16px;
                font-size: 0.95rem;
                text-align: center;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .menu-toggle {
                display: inline-flex;
            }
        }
        @media (max-width: 480px) {
            .site-header {
                padding: 8px 10px;
            }
            .nav-bar {
                padding: 6px 12px;
            }
            .logo {
                font-size: 1.15rem;
            }
        }

        /* ========== 文章页 Hero 区 ========== */
        .article-hero {
            background: linear-gradient(180deg, #F4F7FA 0%, #EAF1F6 100%);
            padding: 150px 0 64px 0;
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 38%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center left;
            opacity: 0.10;
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 28px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            opacity: 0.5;
            margin: 0 2px;
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
        }
        .article-title-wrap {
            max-width: 820px;
        }
        .article-title {
            font-size: clamp(1.8rem, 3.2vw, 2.6rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .article-meta .badge {
            text-transform: none;
        }
        .article-meta time {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta svg {
            width: 15px;
            height: 15px;
            stroke: var(--text-muted);
        }

        /* ========== 面包屑 + 主体 ========== */
        .article-main {
            padding: 48px 0 80px 0;
        }
        .article-shell {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 18px;
            box-shadow: var(--shadow-sm);
            padding: 48px 52px;
            max-width: 860px;
            margin: -24px auto 0 auto;
            position: relative;
            z-index: 2;
        }
        .article-body {
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body p {
            margin-bottom: 1.5em;
        }
        .article-body h2 {
            font-size: clamp(1.35rem, 2.2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin: 2em 0 0.8em 0;
            line-height: 1.4;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
        }
        .article-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin: 1.6em 0 0.6em 0;
            line-height: 1.5;
        }
        .article-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin: 1.4em 0 0.5em 0;
        }
        .article-body img {
            border-radius: var(--radius-card);
            margin: 1.8em auto;
            box-shadow: var(--shadow-sm);
            max-width: 100%;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-thickness: 1px;
        }
        .article-body a:hover {
            color: var(--accent);
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.5em;
            padding-left: 1.4em;
        }
        .article-body li {
            margin-bottom: 0.5em;
            line-height: 1.8;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--blue-gray);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 1.6em 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 0.92rem;
        }
        .article-body table th {
            background: var(--blue-gray);
            color: var(--text);
            font-weight: 600;
            text-align: left;
            padding: 12px 14px;
            border: 1px solid var(--border);
        }
        .article-body table td {
            padding: 11px 14px;
            border: 1px solid var(--border);
            color: var(--text-secondary);
        }
        .article-body table tr:nth-child(even) td {
            background: rgba(247, 249, 251, 0.6);
        }
        .article-body pre {
            background: #16283a;
            color: #e6edf3;
            padding: 20px 24px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 1.6em 0;
            font-size: 0.88rem;
            line-height: 1.7;
        }
        .article-body code {
            font-family: "SF Mono", "Fira Code", Consolas, monospace;
        }
        .article-body hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 2.4em 0;
        }

        /* ========== 空状态 ========== */
        .not-found {
            text-align: center;
            padding: 60px 30px;
        }
        .not-found .empty-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--blue-gray);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            color: var(--text-muted);
        }
        .not-found h2 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }
        .not-found p {
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        /* ========== 文章底部导航 ========== */
        .article-bottom-nav {
            margin-top: 44px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-bottom-nav .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
        }
        .article-bottom-nav .back-link:hover {
            color: var(--primary);
        }
        .article-bottom-nav .back-link svg {
            width: 16px;
            height: 16px;
        }

        /* ========== 相关阅读 ========== */
        .related-section {
            padding: 72px 0 96px 0;
            background: #fff;
        }
        .related-section .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .related-section .section-head h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.8rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }
        .related-section .section-head p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .related-card .cover {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            background: var(--blue-gray);
        }
        .related-card-body {
            padding: 22px 20px 24px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .related-card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            transition: color var(--transition);
        }
        .related-card:hover .related-card-body h3 {
            color: var(--primary);
        }
        .related-card-body p {
            font-size: 0.87rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-body .card-link {
            color: var(--accent);
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .related-card-body .card-link svg {
            width: 14px;
            height: 14px;
            transition: transform var(--transition);
        }
        .related-card-body .card-link:hover svg {
            transform: translateX(3px);
        }

        /* ========== CTA 区块 ========== */
        .cta-section {
            background: var(--footer-bg);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--primary-light));
        }
        .cta-inner {
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            color: #fff;
            font-size: clamp(1.5rem, 2.6vw, 2rem);
            font-weight: 600;
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, 0.72);
            font-size: 0.98rem;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-inner .btn {
            margin: 0 8px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--footer-bg);
            padding-top: 0;
        }
        .site-footer .container {
            padding-top: 56px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand .logo .logo-dot {
            color: var(--accent);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.92rem;
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.88rem;
        }
        .footer-contact svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
            stroke: var(--accent);
        }
        .footer-bottom {
            padding: 24px 0 30px 0;
            text-align: center;
        }
        .footer-bottom p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.82rem;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .article-shell {
                padding: 40px 40px;
            }
        }
        @media (max-width: 768px) {
            .article-hero {
                padding: 130px 0 48px 0;
            }
            .article-hero::before {
                width: 60%;
            }
            .article-shell {
                padding: 32px 28px;
                margin-top: -16px;
                border-radius: 14px;
            }
            .article-title {
                font-size: 1.65rem;
            }
            .article-main {
                padding: 32px 0 64px 0;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-section {
                padding: 56px 0 72px 0;
            }
            .cta-section {
                padding: 56px 0;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .breadcrumb .current {
                max-width: 200px;
            }
            .article-hero {
                padding: 120px 0 40px 0;
            }
            .article-shell {
                padding: 24px 18px;
            }
            .article-bottom-nav {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-inner .btn {
                display: block;
                width: 100%;
                margin: 10px 0;
            }
            .footer-bottom p {
                font-size: 0.75rem;
            }
        }
        @media (max-width: 480px) {
            .article-meta {
                gap: 10px;
            }
            .article-meta .meta-item {
                font-size: 0.8rem;
            }
        }

/* roulang page: category2 */
*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1E5F74;
            --primary-dark: #174A5A;
            --primary-light: #5C8A99;
            --accent: #E86A3E;
            --accent-hover: #D4592F;
            --accent-bg: #FFF0EA;
            --bg: #F7F9FB;
            --card: #FFFFFF;
            --band: #EEF3F7;
            --footer-bg: #0F2A3A;
            --text: #1A2B3C;
            --text-secondary: #4A5B6A;
            --text-muted: #8A9AA8;
            --border: #E3E9EF;
            --success: #2F9E6E;
            --warn: #D99A28;
            --radius-card: 14px;
            --radius-btn: 999px;
            --shadow-sm: 0 2px 8px rgba(20, 40, 60, 0.06);
            --shadow-md: 0 10px 24px rgba(20, 40, 60, 0.10);
            --transition: 0.25s ease;
            --container: 1140px;
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img {
            max-width: 100%;
            display: block;
            border: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 200;
            padding: 14px 20px 0;
            pointer-events: none;
        }
        .nav-bar {
            max-width: var(--container);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: rgba(255, 255, 255, 0.82);
            -webkit-backdrop-filter: blur(14px);
            backdrop-filter: blur(14px);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 10px 22px;
            box-shadow: var(--shadow-sm);
            pointer-events: auto;
            position: relative;
        }
        .logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.2px;
            display: inline-flex;
            align-items: center;
            gap: 2px;
            white-space: nowrap;
            text-decoration: none;
        }
        .logo-dot {
            color: var(--accent);
            font-size: 1.4rem;
            line-height: 0;
            margin-left: 1px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            position: relative;
            transition: color var(--transition), background var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 95, 116, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 3px;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--primary);
            transform: translateX(-50%);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: #ffffff;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline {
            background: #ffffff;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: rgba(30, 95, 116, 0.05);
            transform: translateY(-1px);
        }
        .btn-large {
            padding: 15px 36px;
            font-size: 1rem;
        }
        .nav-cta {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--band);
        }
        .menu-toggle svg {
            width: 22px;
            height: 22px;
        }

        main {
            flex: 1 0 auto;
        }

        .hero-slim {
            position: relative;
            padding: 150px 20px 76px;
            background: linear-gradient(135deg, #F4F7FA 0%, #EAF1F6 100%);
            overflow: hidden;
        }
        .hero-slim::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center right / cover no-repeat;
            opacity: 0.15;
            z-index: 1;
        }
        .hero-slim .container {
            position: relative;
            z-index: 2;
            max-width: 860px;
            text-align: center;
        }
        .breadcrumb {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 18px;
            display: flex;
            gap: 6px;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .hero-slim h1 {
            font-size: clamp(1.8rem, 3.2vw, 2.6rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .hero-slim .subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 620px;
            margin: 0 auto;
        }

        .section {
            padding: 96px 20px;
        }
        .section-alt {
            background: var(--card);
        }
        .section-band {
            background: var(--band);
        }
        .section-header {
            max-width: 760px;
            margin: 0 auto 40px;
            text-align: center;
        }
        .section-header h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.8rem);
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.85;
        }

        .intro-block {
            padding: 96px 20px;
            background: var(--card);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            position: relative;
            aspect-ratio: 4 / 3;
            background: var(--band);
        }
        .intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .intro-content h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.8rem);
            font-weight: 600;
            line-height: 1.4;
            color: var(--text);
            margin-bottom: 18px;
        }
        .intro-content p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .intro-content .more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--primary);
            text-underline-offset: 4px;
        }
        .intro-content .more-link:hover {
            text-decoration: underline;
        }

        .guide-cards {
            padding: 96px 20px;
            background: var(--bg);
        }
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .card-item {
            background: var(--card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .card-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--accent-bg);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }
        .card-icon svg {
            width: 24px;
            height: 24px;
        }
        .card-item h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .card-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .scenarios {
            padding: 96px 20px;
            background: var(--card);
        }
        .scenarios-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .scenarios-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            aspect-ratio: 4 / 3;
            background: var(--band);
        }
        .scenarios-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scenarios-content h2 {
            font-size: clamp(1.4rem, 2.2vw, 1.8rem);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 22px;
        }
        .check-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 10px 0;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.75;
        }
        .check-list .check-icon {
            flex: 0 0 auto;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--accent);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 3px;
        }
        .check-list .check-icon svg {
            width: 12px;
            height: 12px;
        }

        .steps-section {
            padding: 96px 20px;
            background: var(--band);
        }
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .step-item {
            position: relative;
            background: var(--card);
            border-radius: var(--radius-card);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            text-align: left;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .step-item h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .faq-section {
            padding: 96px 20px;
            background: var(--card);
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
            border-left: 3px solid var(--primary);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text);
            transition: color var(--transition);
            min-height: 54px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex: 0 0 auto;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--band);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition), transform 0.2s ease;
        }
        .faq-icon svg {
            width: 14px;
            height: 14px;
            transition: transform 0.2s ease;
        }
        .faq-item.active .faq-icon {
            background: var(--accent-bg);
            transform: rotate(45deg);
        }
        .faq-item.active .faq-icon svg {
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.93rem;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        .cta-section {
            position: relative;
            padding: 80px 20px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            text-align: center;
            color: #ffffff;
        }
        .cta-section h2 {
            font-size: clamp(1.5rem, 2.4vw, 2rem);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 580px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-section .btn-outline {
            border-color: #ffffff;
            color: #ffffff;
            background: transparent;
        }
        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
            margin-top: auto;
            position: relative;
        }
        .site-footer::before {
            content: "";
            position: absolute;
            top: -40px;
            left: 0;
            width: 100%;
            height: 40px;
            background: linear-gradient(to bottom right, transparent 49%, var(--footer-bg) 50%, var(--footer-bg) 100%);
            background-size: 40px 40px;
            background-repeat: repeat-x;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 44px;
            padding-bottom: 40px;
        }
        .footer-brand .logo {
            color: #ffffff;
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            margin-top: 14px;
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            gap: 10px;
            align-items: center;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 12px;
        }
        .footer-contact svg {
            width: 16px;
            height: 16px;
            color: var(--accent);
            flex: 0 0 auto;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .sticky-cta {
            position: sticky;
            bottom: 0;
            z-index: 150;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: rgba(255, 255, 255, 0.96);
            -webkit-backdrop-filter: blur(10px);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--border);
            padding: 12px 24px;
            box-shadow: 0 -4px 16px rgba(20, 40, 60, 0.06);
        }
        .sticky-cta .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .sticky-cta p {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text);
        }
        .sticky-cta .btn {
            padding: 10px 24px;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                background: #ffffff;
                border-radius: 16px;
                box-shadow: var(--shadow-md);
                border: 1px solid var(--border);
                padding: 14px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                padding: 14px 18px;
                text-align: center;
                justify-content: center;
            }
            .nav-link.active::after {
                display: none;
            }
            .menu-toggle {
                display: inline-flex;
            }
            .nav-cta {
                display: none;
            }
            .intro-grid,
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-media,
            .scenarios-media {
                order: -1;
            }
            .section,
            .intro-block,
            .guide-cards,
            .scenarios,
            .steps-section,
            .faq-section {
                padding: 64px 20px;
            }
            .cards-grid,
            .steps-wrap {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-slim {
                padding: 130px 16px 56px;
            }
            .sticky-cta .container {
                flex-direction: row;
            }
            .sticky-cta p {
                font-size: 0.8rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-slim h1 {
                font-size: 1.7rem;
            }
            .hero-slim .subtitle {
                font-size: 0.92rem;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .steps-wrap {
                grid-template-columns: 1fr;
            }
            .card-item,
            .step-item {
                padding: 22px 18px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .sticky-cta {
                padding: 10px 14px;
            }
            .sticky-cta .container {
                flex-wrap: nowrap;
            }
            .sticky-cta p {
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
                max-width: 50%;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #1E5F74;
  --primary-dark: #174A5A;
  --primary-light: #5C8A99;
  --accent: #E86A3E;
  --accent-hover: #D4592F;
  --accent-bg: #FFF0EA;
  --bg-base: #F7F9FB;
  --bg-soft: #F4F7FA;
  --bg-blue: #EEF3F7;
  --card-bg: #FFFFFF;
  --text-main: #1A2B3C;
  --text-sub: #4A5B6A;
  --text-weak: #8A9AA8;
  --border: #E3E9EF;
  --success: #2F9E6E;
  --warning: #D99A28;
  --footer-bg: #0F2A3A;
  --radius-card: 14px;
  --radius-btn: 999px;
  --radius-input: 10px;
  --shadow-sm: 0 2px 8px rgba(20, 40, 60, 0.06);
  --shadow-md: 0 10px 24px rgba(20, 40, 60, 0.10);
  --container-w: 1140px;
  --space-section: clamp(64px, 8vw, 96px);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s ease, box-shadow 0.2s ease; }
a:hover { color: var(--accent); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 20px; }
.section { padding: var(--space-section) 0; }
.section-head { margin-bottom: 40px; }
.section-head.center { text-align: center; }
.section-head h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.8rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-head p { color: var(--text-sub); font-size: 0.95rem; max-width: 56ch; margin: 0 auto; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 2px solid var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(232, 106, 62, 0.28);
}
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-outline {
  background: var(--card-bg);
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: rgba(30, 95, 116, 0.06);
  color: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.7);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
  border-color: #fff;
}
.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn:focus-visible, .nav-link:focus-visible, .menu-toggle:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(30, 95, 116, 0.08);
  color: var(--primary);
}
.badge i { font-size: 0.7rem; }
main { padding-top: 92px; }

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 14px 20px 0;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(227,233,239,0.5);
}
.nav-bar {
  max-width: var(--container-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.92);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 16px 10px 22px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease;
}
.nav-bar:hover { box-shadow: var(--shadow-md); }
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.5px;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.logo-dot { color: var(--accent); font-size: 1.4rem; line-height: 0; transform: translateY(-2px); display: inline-block; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-link:hover { color: var(--primary); background: rgba(30, 95, 116, 0.06); }
.nav-link.active { color: var(--primary); font-weight: 600; background: rgba(30, 95, 116, 0.10); }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 16px;
  height: 4px;
  border-radius: 4px;
  background: var(--accent);
  opacity: 0.65;
}
.nav-cta { padding: 10px 22px; font-size: 0.85rem; }
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-main);
  background: var(--card-bg);
  transition: all 0.2s ease;
}
.menu-toggle:hover { color: var(--primary); border-color: var(--primary); }

/* ===== Page Hero ===== */
.page-hero {
  background: linear-gradient(135deg, #F4F7FA 0%, #EAF1F6 100%);
  padding: 64px 0 56px;
  border-bottom: 1px solid rgba(227,233,239,0.6);
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(30, 95, 116, 0.08);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-tag i { color: var(--accent); }
.hero-content h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.75;
  max-width: 480px;
  margin-bottom: 28px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 32px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-badges .badge {
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 8px 16px;
}
.hero-image {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255,255,255,0.6);
}
.hero-image img { width: 100%; height: 320px; object-fit: cover; transition: transform 0.4s ease; }
.hero-image:hover img { transform: scale(1.03); }

/* ===== Feature Cards ===== */
.feature-cards { background: var(--bg-base); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(30, 95, 116, 0.25);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #fff;
  font-size: 1.25rem;
  transition: background 0.25s ease;
}
.feature-card:nth-child(2) .feature-icon { background: var(--accent); }
.feature-card:nth-child(3) .feature-icon { background: var(--primary-light); }
.feature-card h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; color: var(--text-main); }
.feature-card p { font-size: 0.92rem; color: var(--text-sub); line-height: 1.75; }

/* ===== Content Scope ===== */
.content-scope { background: var(--bg-soft); }
.scope-list { display: flex; flex-direction: column; gap: 64px; }
.scope-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.scope-row.reverse .scope-image { order: 2; }
.scope-row.reverse .scope-text { order: 1; }
.scope-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}
.scope-image img { width: 100%; height: 280px; object-fit: cover; transition: transform 0.4s ease; }
.scope-image:hover img { transform: scale(1.04); }
.scope-text h3 { font-size: 1.25rem; font-weight: 600; color: var(--text-main); margin-bottom: 12px; }
.scope-text p { font-size: 0.95rem; color: var(--text-sub); line-height: 1.75; margin-bottom: 20px; max-width: 44ch; }
.check-list { display: flex; flex-direction: column; gap: 10px; }
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-main);
}
.check-list li i {
  color: #fff;
  background: var(--accent);
  border-radius: 50%;
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  margin-top: 4px;
  flex-shrink: 0;
}

/* ===== Info Flow ===== */
.info-flow { background: var(--bg-base); }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 36px 28px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
}
.step-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-bg);
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.step-item h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; color: var(--text-main); }
.step-item p { font-size: 0.9rem; color: var(--text-sub); line-height: 1.7; }

/* ===== Use Scene ===== */
.use-scene { background: var(--bg-blue); }
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scene-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  padding: 32px 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  text-align: center;
}
.scene-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.scene-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-bg);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin: 0 auto 18px;
}
.scene-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 10px; color: var(--text-main); }
.scene-card p { font-size: 0.9rem; color: var(--text-sub); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-base); }
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color 0.2s ease;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.2s ease, background 0.2s ease;
}
.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(135deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-sub);
  line-height: 1.75;
  padding: 0 20px 20px;
}

/* ===== CTA ===== */
.cta-section { background: var(--bg-base); padding-top: 0; }
.cta-box {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 20px;
  padding: 56px 48px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  pointer-events: none;
}
.cta-box > * { position: relative; z-index: 1; }
.cta-text h2 { font-size: clamp(1.4rem, 2.2vw, 1.8rem); font-weight: 600; margin-bottom: 10px; }
.cta-text p { font-size: 0.95rem; color: rgba(255,255,255,0.85); max-width: 40ch; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Back Home ===== */
.back-home {
  padding: 40px 0 0;
  text-align: center;
}
.back-home a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}
.back-home a:hover { box-shadow: var(--shadow-md); color: var(--accent); }

/* ===== Footer ===== */
.site-footer {
  background: var(--footer-bg);
  color: rgba(255,255,255,0.7);
  margin-top: 40px;
  padding-top: 64px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 30ch; margin-top: 12px; }
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a {
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  transition: color 0.2s ease;
}
.footer-col ul a:hover { color: var(--accent); }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
}
.footer-contact li svg { width: 16px; height: 16px; flex-shrink: 0; color: rgba(255,255,255,0.5); }
.footer-bottom {
  text-align: center;
  padding: 20px 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
}
.footer-bottom p { margin: 0; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-inner { gap: 32px; }
  .scope-row { gap: 32px; }
  .feature-grid, .steps-grid, .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .scope-row, .scope-row.reverse {
    grid-template-columns: 1fr;
  }
  .scope-row.reverse .scope-image { order: 1; }
  .scope-row.reverse .scope-text { order: 2; }
  .scope-image img { height: 240px; }
  .cta-box { flex-direction: column; text-align: center; }
  .cta-text p { margin: 0 auto; }
}
@media (max-width: 768px) {
  main { padding-top: 80px; }
  .site-header { padding: 10px 12px 0; }
  .nav-bar { flex-wrap: wrap; border-radius: 18px; padding: 10px 14px; }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    margin-top: 12px;
    background: #fff;
    border-radius: 14px;
    padding: 14px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 12px 16px; text-align: left; }
  .nav-link.active::after { display: none; }
  .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-badges { justify-content: center; }
  .hero-image { order: -1; }
  .hero-image img { height: 220px; }
  .feature-grid, .steps-grid, .scene-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
  .scope-list { gap: 48px; }
  .scope-image img { height: 200px; }
  .cta-box { padding: 40px 24px; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .btn-lg { width: 100%; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .faq-question { font-size: 0.95rem; }
  .cta-box::before { opacity: 0.18; }
  .section-head p { font-size: 0.9rem; }
}