/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
    --primary: #0e5a73;
    --primary-dark: #094052;
    --primary-light: #1b7e9c;
    --accent: #12b5c8;
    --accent-light: #64e1ec;
    --bg: #f4f8fa;
    --bg-alt: #ffffff;
    --bg-dark: #0a2e3a;
    --text: #1a2b3c;
    --text-weak: #5a7a8c;
    --border: #dce8ee;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow: 0 8px 30px rgba(10, 46, 58, 0.08);
    --shadow-lg: 0 16px 48px rgba(10, 46, 58, 0.14);
    --transition: 0.25s ease;
    --nav-height: 80px;
}
/* ========== 基础 Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    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); }
a:focus-visible { outline: 3px solid rgba(18, 181, 200, 0.4); outline-offset: 2px; border-radius: 4px; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========== 导航 ========== */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    background: rgba(12, 44, 58, 0.35);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}
.site-header.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 4px 24px rgba(10, 46, 58, 0.08);
    border-bottom-color: rgba(220, 232, 238, 0.8);
}
.site-header.scrolled .logo-text,
.site-header.scrolled .nav-link,
.site-header.scrolled .nav-toggle {
    color: var(--text);
}
.site-header.scrolled .logo-badge {
    background: var(--primary);
    color: #fff;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px; height: 44px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
    white-space: nowrap;
    transition: color 0.3s ease;
}
.logo-text span { color: var(--accent-light); }
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
}
.nav-link {
    display: inline-block;
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    border-radius: 10px;
    transition: color 0.25s ease, background 0.25s ease;
}
.nav-link:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }
.nav-link.active {
    color: #fff;
    background: rgba(18, 181, 200, 0.3);
    box-shadow: 0 0 0 1px rgba(100, 225, 236, 0.3);
}
.site-header.scrolled .nav-link:hover { color: var(--primary); background: rgba(14, 90, 115, 0.08); }
.site-header.scrolled .nav-link.active { color: var(--primary); background: rgba(18, 181, 200, 0.12); box-shadow: 0 0 0 1px rgba(18, 181, 200, 0.3); }
.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    border-radius: 999px;
    box-shadow: 0 4px 15px rgba(18, 181, 200, 0.25);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    flex-shrink: 0;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(18, 181, 200, 0.35); color: #fff; }
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px; height: 44px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.08);
    padding: 10px;
    z-index: 1100;
}
.nav-toggle span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: #fff;
    transition: background 0.3s ease, transform 0.3s ease, opacity 0.3s ease;
}
.site-header.scrolled .nav-toggle span { background: var(--text); }
.nav-toggle.active span { background: var(--text); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--nav-height) + 60px) 0 80px;
    background-image: linear-gradient(135deg, rgba(10, 46, 58, 0.82), rgba(14, 90, 115, 0.72)), url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    color: #fff;
    overflow: hidden;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 160px;
    background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
    pointer-events: none;
}
.hero-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 860px;
    margin: 0 auto;
}
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-light);
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(100, 225, 236, 0.3);
    border-radius: 999px;
    margin-bottom: 28px;
    letter-spacing: 2px;
}
.hero-tag::before {
    content: '●';
    font-size: 8px;
    color: var(--accent-light);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.hero h1 {
    font-size: clamp(40px, 6vw, 68px);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: 2px;
    margin-bottom: 20px;
    background: linear-gradient(120deg, #ffffff 20%, var(--accent-light) 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: clamp(16px, 2vw, 20px);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.hero-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 999px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.btn-primary {
    color: var(--primary-dark);
    background: linear-gradient(135deg, var(--accent-light), var(--accent));
    box-shadow: 0 6px 25px rgba(18, 181, 200, 0.3);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(18, 181, 200, 0.45); }
.btn-outline {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.3);
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.16); transform: translateY(-3px); border-color: rgba(255, 255, 255, 0.5); }
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    padding-top: 36px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}
.hero-stat {
    text-align: center;
}
.hero-stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--accent-light);
    display: block;
    line-height: 1.3;
}
.hero-stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 1px;
}

/* ========== 通用板块 ========== */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-alt); }
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}
.section-tag {
    display: inline-block;
    padding: 6px 18px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(18, 181, 200, 0.1);
    border-radius: 999px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.3;
    color: var(--text);
    margin-bottom: 16px;
}
.section-desc {
    font-size: 16px;
    color: var(--text-weak);
    line-height: 1.8;
}

/* ========== 特点卡片 ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    opacity: 0;
    transition: opacity 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(18, 181, 200, 0.3);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px; height: 56px;
    border-radius: 16px;
    font-size: 24px;
    color: var(--primary);
    background: rgba(18, 181, 200, 0.1);
    margin-bottom: 20px;
    transition: background 0.3s ease, transform 0.3s ease;
}
.feature-card:hover .feature-icon { background: rgba(18, 181, 200, 0.18); transform: scale(1.05); }
.feature-title { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.feature-desc { font-size: 14px; color: var(--text-weak); line-height: 1.7; }

/* ========== 分类入口 ========== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.category-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(10, 46, 58, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: block;
}
.category-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.category-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.category-card:hover img { transform: scale(1.06); }
.category-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 46, 58, 0.9) 0%, rgba(10, 46, 58, 0.25) 55%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 28px;
    transition: background 0.3s ease;
}
.category-card:hover .category-overlay { background: linear-gradient(to top, rgba(14, 90, 115, 0.95) 0%, rgba(10, 46, 58, 0.4) 60%, transparent 100%); }
.category-name {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}
.category-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.6;
    margin-bottom: 16px;
}
.category-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-light);
}
.category-more::after { content: '→'; transition: transform 0.25s ease; }
.category-card:hover .category-more::after { transform: translateX(4px); }

/* ========== 资讯列表 ========== */
.news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.news-card {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(18, 181, 200, 0.25); }
.news-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-weak);
}
.news-badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(18, 181, 200, 0.1);
    border-radius: 999px;
}
.news-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.5;
    transition: color 0.25s ease;
}
.news-card:hover .news-title { color: var(--primary); }
.news-summary {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    flex: 1;
}
.news-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}
.news-more::after { content: '→'; transition: transform 0.25s ease; }
.news-card:hover .news-more::after { transform: translateX(4px); }
.news-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 24px;
    color: var(--text-weak);
    font-size: 16px;
    background: var(--bg-alt);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
}

/* ========== 流程板块 ========== */
.steps-section {
    position: relative;
    background: var(--bg-dark);
    color: #fff;
    padding: 90px 0;
    background-image: linear-gradient(120deg, rgba(10, 46, 58, 0.95), rgba(14, 90, 115, 0.85)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
}
.steps-section .section-title { color: #fff; }
.steps-section .section-desc { color: rgba(255, 255, 255, 0.7); }
.steps-section .section-tag { background: rgba(255, 255, 255, 0.12); color: var(--accent-light); }
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.step-item {
    position: relative;
    padding: 32px 24px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    text-align: center;
    transition: background 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
    backdrop-filter: blur(8px);
}
.step-item:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-4px); border-color: rgba(100, 225, 236, 0.3); }
.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px; height: 48px;
    border-radius: 50%;
    font-size: 18px;
    font-weight: 800;
    color: var(--accent-light);
    background: rgba(18, 181, 200, 0.15);
    border: 1px solid rgba(100, 225, 236, 0.3);
    margin-bottom: 16px;
}
.step-title { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.step-desc { font-size: 14px; color: rgba(255, 255, 255, 0.7); line-height: 1.6; }

/* ========== 数据统计 ========== */
.stats-section { background: var(--bg-alt); }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.stat-card {
    text-align: center;
    padding: 40px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
    display: block;
    margin-bottom: 8px;
}
.stat-number em { font-style: normal; font-size: 24px; color: var(--accent); margin-left: 2px; }
.stat-label { font-size: 14px; color: var(--text-weak); }

/* ========== FAQ ========== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.faq-item {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item:hover { border-color: rgba(18, 181, 200, 0.3); box-shadow: var(--shadow); }
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 28px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    transition: color 0.25s ease;
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
    width: 28px; height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--primary);
    background: rgba(18, 181, 200, 0.1);
    border-radius: 50%;
    flex-shrink: 0;
    transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: rgba(18, 181, 200, 0.2); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 28px;
    font-size: 15px;
    color: var(--text-weak);
    line-height: 1.8;
    transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.open .faq-answer {
    max-height: 300px;
    padding-bottom: 22px;
}

/* ========== CTA ========== */
.cta-section { padding: 80px 0; }
.cta-box {
    position: relative;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius);
    padding: 64px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    overflow: hidden;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    color: #fff;
}
.cta-box::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(9, 64, 82, 0.93), rgba(14, 90, 115, 0.82));
}
.cta-content { position: relative; z-index: 1; max-width: 600px; }
.cta-title { font-size: clamp(26px, 3vw, 34px); font-weight: 800; line-height: 1.3; margin-bottom: 12px; }
.cta-desc { font-size: 16px; color: rgba(255, 255, 255, 0.85); line-height: 1.7; }
.cta-actions { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 12px; flex-shrink: 0; }
.cta-actions .btn { white-space: nowrap; }
.btn-light {
    color: var(--primary-dark);
    background: #fff;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}
.btn-light:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2); }
.btn-ghost-light {
    color: #fff;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
}
.btn-ghost-light:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-3px); border-color: rgba(255, 255, 255, 0.6); }

/* ========== 页脚 ========== */
.site-footer {
    background: var(--bg-dark);
    color: #fff;
    padding: 64px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 32px;
}
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-badge { background: rgba(255, 255, 255, 0.15); }
.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.8;
    margin-top: 20px;
    max-width: 320px;
}
.footer-title { font-size: 16px; font-weight: 700; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer-title::after {
    content: '';
    position: absolute;
    left: 0; bottom: 0;
    width: 28px; height: 3px;
    background: var(--accent);
    border-radius: 2px;
}
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    transition: color 0.25s ease, padding-left 0.25s ease;
}
.footer-links a:hover { color: var(--accent-light); padding-left: 6px; }
.footer-contact { font-size: 14px; color: rgba(255, 255, 255, 0.65); line-height: 2; }
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.5); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .categories-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .category-overlay { padding: 20px; }
    .category-name { font-size: 17px; }
    .category-desc { font-size: 13px; }
}
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        top: 0; right: 0;
        width: min(80vw, 360px);
        height: 100vh;
        background: rgba(10, 46, 58, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 40px;
        gap: 8px;
        transform: translateX(100%);
        transition: transform 0.35s ease;
        z-index: 1050;
        box-shadow: -20px 0 60px rgba(0, 0, 0, 0.3);
    }
    .main-nav.open { transform: translateX(0); }
    .nav-link {
        font-size: 18px;
        color: #fff !important;
        padding: 14px 20px;
        width: 100%;
        border-radius: 12px;
    }
    .nav-link:hover { background: rgba(255, 255, 255, 0.1); }
    .nav-link.active { background: rgba(18, 181, 200, 0.2); }
    .nav-cta { margin-top: 20px; margin-left: 20px; }
    .site-header.scrolled .nav-link { color: #fff; }
    .section { padding: 60px 0; }
    .hero { padding: calc(var(--nav-height) + 40px) 0 60px; }
    .hero-actions { flex-direction: column; gap: 12px; }
    .hero-stats { gap: 24px; }
    .hero-stat-number { font-size: 26px; }
    .categories-grid { grid-template-columns: 1fr 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .cta-box { flex-direction: column; text-align: center; padding: 48px 28px; }
    .cta-actions { align-items: center; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .logo-text { font-size: 16px; }
    .features-grid { grid-template-columns: 1fr; }
    .steps-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .categories-grid { grid-template-columns: 1fr; }
    .news-card { padding: 20px; }
    .faq-question { padding: 18px 20px; font-size: 15px; }
    .faq-answer { padding: 0 20px; }
    .cta-box { padding: 36px 20px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

/* ========== 按钮和链接状态 ========== */
.btn:active { transform: translateY(0) scale(0.98); }
.nav-link:active { transform: scale(0.97); }
.category-card:active { transform: scale(0.98); }
:focus-visible {
    outline: 3px solid rgba(18, 181, 200, 0.5);
    outline-offset: 2px;
}

/* ========== 背景装饰 ========== */
.section-decor {
    position: relative;
}
.section-decor::before {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(18, 181, 200, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

/* ========== 首页特有 ========== */
.hero-shape-bottom {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    pointer-events: none;
    z-index: 1;
}
.hero-shape-bottom svg { display: block; width: 100%; height: 100px; fill: var(--bg); }

/* roulang page: category1 */
:root {
            --primary: #0c2d4a;
            --primary-dark: #081e32;
            --primary-light: #144a75;
            --accent: #0e8f8c;
            --accent-dark: #0a6e6b;
            --accent-light: #3bc5c2;
            --bg: #f4f7fa;
            --bg-light: #ffffff;
            --text: #152b3c;
            --text-light: #5e7390;
            --text-lighter: #8ba0b5;
            --border: #dfe8ef;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(12, 45, 74, 0.06);
            --shadow: 0 12px 34px rgba(12, 45, 74, 0.10);
            --shadow-lg: 0 24px 60px rgba(12, 45, 74, 0.16);
            --space: 96px;
            --header-h: 76px;
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1220px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 30, 50, 0.42);
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.94);
            border-bottom-color: var(--border);
            box-shadow: 0 6px 28px rgba(12, 45, 74, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-badge {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(14, 143, 140, 0.35);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: .5px;
            color: #fff;
            transition: color .35s;
        }
        .logo-text span {
            color: var(--accent-light);
        }
        .site-header.scrolled .logo-text {
            color: var(--text);
        }
        .site-header.scrolled .logo-text span {
            color: var(--accent);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            transition: background .25s, color .25s;
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.18);
            font-weight: 600;
        }
        .site-header.scrolled .nav-link {
            color: var(--text);
        }
        .site-header.scrolled .nav-link:hover {
            color: var(--primary);
            background: rgba(12, 45, 74, 0.06);
        }
        .site-header.scrolled .nav-link.active {
            color: var(--accent);
            background: rgba(14, 143, 140, 0.12);
        }
        .nav-cta {
            margin-left: 12px;
            padding: 9px 24px;
            border-radius: 10px;
            background: #fff;
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            transition: transform .25s, box-shadow .25s, background .25s;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(255, 255, 255, 0.25);
        }
        .site-header.scrolled .nav-cta {
            background: var(--primary);
            color: #fff;
        }
        .site-header.scrolled .nav-cta:hover {
            background: var(--primary-light);
            box-shadow: 0 6px 20px rgba(12, 45, 74, 0.22);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
            z-index: 1100;
        }
        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: transform .3s, opacity .3s, background .3s;
        }
        .site-header.scrolled .nav-toggle span {
            background: var(--text);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .page-hero {
            position: relative;
            padding: 180px 0 90px;
            background: linear-gradient(135deg, rgba(8, 30, 50, 0.92), rgba(12, 45, 74, 0.78)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .breadcrumb a:hover {
            color: var(--accent-light);
        }
        .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.4);
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: .5px;
            max-width: 760px;
            margin-bottom: 20px;
        }
        .page-hero h1 em {
            font-style: normal;
            color: var(--accent-light);
        }
        .page-hero .hero-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 32px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            transition: transform .25s, box-shadow .25s, background .25s, border-color .25s;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 24px rgba(14, 143, 140, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(14, 143, 140, 0.4);
        }
        .btn-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.45);
            color: #fff;
        }
        .btn-ghost:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }
        .btn-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
        }

        .section {
            padding: var(--space) 0;
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }
        .section-label {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(14, 143, 140, 0.10);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
        }

        .methods-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .methods-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform .35s, box-shadow .35s;
        }
        .methods-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .method-img {
            overflow: hidden;
            position: relative;
            height: 210px;
        }
        .method-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .methods-card:hover .method-img img {
            transform: scale(1.06);
        }
        .method-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(12, 45, 74, 0.40), transparent 55%);
        }
        .method-body {
            padding: 28px;
        }
        .method-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            font-size: 18px;
            margin-bottom: 18px;
            box-shadow: 0 6px 16px rgba(14, 143, 140, 0.3);
        }
        .method-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .method-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
        }
        .text-link i {
            transition: transform .25s;
        }
        .text-link:hover i {
            transform: translateX(4px);
        }

        .steps-section {
            background: linear-gradient(180deg, #eef3f7 0%, #f7fafc 100%);
            position: relative;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .step-item {
            position: relative;
            background: var(--bg-light);
            border-radius: var(--radius);
            padding: 36px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform .3s, box-shadow .3s;
        }
        .step-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
        }
        .step-num {
            display: block;
            font-size: 44px;
            font-weight: 800;
            color: rgba(14, 143, 140, 0.18);
            line-height: 1;
            margin-bottom: 20px;
            font-family: 'SF Mono', 'Fira Code', monospace;
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.75;
        }
        .step-dot {
            position: absolute;
            top: 44px;
            right: 24px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 0 4px rgba(14, 143, 140, 0.15);
        }

        .stats-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(14, 143, 140, 0.2);
            filter: blur(80px);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 2;
        }
        .stat-item {
            text-align: center;
            padding: 20px 10px;
        }
        .stat-num {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.2;
            background: linear-gradient(135deg, #fff, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
            margin-bottom: 8px;
        }
        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            letter-spacing: 1px;
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--bg-light);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform .35s, box-shadow .35s;
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .article-cover {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }
        .article-card:hover .article-cover img {
            transform: scale(1.05);
        }
        .article-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(12, 45, 74, 0.25), transparent 50%);
        }
        .article-body {
            padding: 26px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .article-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.75;
            flex: 1;
            margin-bottom: 18px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-lighter);
        }
        .article-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 14px;
        }
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(14, 143, 140, 0.10);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 14px;
            align-self: flex-start;
        }

        .faq-section {
            background: #eef3f7;
        }
        .faq-list {
            max-width: 880px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-light);
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow .3s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-item summary {
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 14px;
            list-style: none;
            transition: color .25s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(14, 143, 140, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--accent);
            transition: transform .3s, background .3s, color .3s;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
            background: var(--accent);
            color: #fff;
        }
        .faq-item .faq-answer {
            padding: 0 28px 24px 76px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.85;
        }

        .cta-section {
            padding: 72px 0;
        }
        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, var(--accent-dark) 100%);
            border-radius: 28px;
            padding: 64px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            filter: blur(30px);
        }
        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
            position: relative;
        }
        .cta-box p {
            font-size: 16px;
            opacity: .85;
            max-width: 560px;
            margin: 0 auto 32px;
            position: relative;
            line-height: 1.8;
        }

        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 20px;
        }
        .footer-desc {
            margin-top: 20px;
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color .25s, padding-left .25s;
        }
        .footer-links a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-contact {
            font-size: 14px;
            line-height: 2;
            color: rgba(255, 255, 255, 0.65);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 1024px) {
            :root {
                --space: 72px;
            }
            .methods-grid,
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .page-hero h1 {
                font-size: 38px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --space: 56px;
                --header-h: 64px;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 0;
                right: 0;
                width: 280px;
                height: 100vh;
                background: var(--primary-dark);
                flex-direction: column;
                align-items: flex-start;
                justify-content: flex-start;
                padding: 90px 28px 40px;
                gap: 8px;
                transform: translateX(100%);
                transition: transform .4s cubic-bezier(.4, 0, .2, 1);
                box-shadow: -12px 0 40px rgba(0, 0, 0, 0.2);
            }
            .main-nav.open {
                transform: translateX(0);
            }
            .main-nav .nav-link {
                display: block;
                width: 100%;
                padding: 12px 16px;
                color: rgba(255, 255, 255, 0.85);
                font-size: 16px;
            }
            .main-nav .nav-link.active,
            .main-nav .nav-link:hover {
                color: #fff;
                background: rgba(255, 255, 255, 0.1);
            }
            .main-nav .nav-cta {
                margin-left: 0;
                margin-top: 16px;
                width: 100%;
                text-align: center;
                background: var(--accent);
                color: #fff;
            }
            .site-header.scrolled .main-nav {
                background: var(--primary-dark);
            }
            .site-header.scrolled .main-nav .nav-link {
                color: rgba(255, 255, 255, 0.85);
            }
            .site-header.scrolled .main-nav .nav-cta {
                background: var(--accent);
                color: #fff;
            }
            .page-hero {
                padding: 130px 0 64px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero .hero-desc {
                font-size: 16px;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .methods-grid,
            .articles-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-box {
                padding: 44px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .logo-text {
                font-size: 18px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-num {
                font-size: 38px;
            }
            .step-item {
                padding: 28px 22px;
            }
            .faq-item summary {
                padding: 18px 20px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 20px 20px 52px;
                font-size: 14px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        :focus-visible {
            outline: 3px solid rgba(14, 143, 140, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

/* roulang page: article */
:root {
    --primary: #1d6fe0;
    --primary-dark: #1557b5;
    --primary-light: #e8f0fe;
    --secondary: #0ea5e9;
    --accent: #10b981;
    --dark: #0f172a;
    --text: #1e293b;
    --muted: #64748b;
    --bg: #f1f5f9;
    --white: #ffffff;
    --border: #e2e8f0;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 8px rgba(15,23,42,.06);
    --shadow: 0 4px 24px rgba(15,23,42,.08);
    --shadow-lg: 0 12px 40px rgba(15,23,42,.14);
    --transition: all .3s ease;
    --container: 1200px;
    --header-height: 74px;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;font-size:16px;line-height:1.75;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
ul,ol{list-style:none;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px;}
.section{padding:76px 0;}
.section-header{text-align:center;max-width:720px;margin:0 auto 48px;}
.section-tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;padding:5px 16px;border-radius:50px;margin-bottom:14px;letter-spacing:.5px;}
.section-title{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.35;color:var(--dark);margin-bottom:14px;letter-spacing:-.5px;}
.section-sub{font-size:16px;color:var(--muted);line-height:1.7;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 30px;border-radius:50px;font-weight:600;font-size:15px;text-decoration:none;border:none;cursor:pointer;transition:var(--transition);}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;box-shadow:0 4px 16px rgba(29,111,224,.3);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(29,111,224,.42);}
.btn-white{background:#fff;color:var(--primary);box-shadow:0 4px 16px rgba(0,0,0,.16);}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(0,0,0,.26);}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary);}
.btn-outline:hover{background:var(--primary-light);}
.badge{display:inline-flex;align-items:center;background:var(--primary-light);color:var(--primary);font-size:13px;font-weight:600;padding:4px 12px;border-radius:50px;line-height:1.4;}
.site-header{position:fixed;top:0;left:0;right:0;width:100%;z-index:1000;padding:16px 0;background:transparent;transition:background .35s ease,padding .35s ease,box-shadow .35s ease;border-bottom:1px solid transparent;}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-badge{width:38px;height:38px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-weight:700;font-size:18px;border-radius:10px;box-shadow:0 4px 12px rgba(29,111,224,.35);}
.logo-text{font-size:20px;font-weight:700;color:#fff;transition:color .3s ease;white-space:nowrap;}
.logo-text span{color:var(--secondary);}
.main-nav{display:flex;align-items:center;gap:30px;}
.nav-link{color:rgba(255,255,255,.9);font-size:15px;font-weight:500;padding:6px 2px;position:relative;transition:var(--transition);border:none;background:none;cursor:pointer;text-decoration:none;}
.nav-link::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#fff;border-radius:2px;transition:var(--transition);}
.nav-link:hover::after,.nav-link.active::after{width:100%;}
.nav-link.active{color:#fff;}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;padding:9px 24px;border-radius:50px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff!important;font-weight:600;font-size:14px;text-decoration:none;box-shadow:0 4px 14px rgba(29,111,224,.35);transition:var(--transition);border:none;cursor:pointer;}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(29,111,224,.46);}
.site-header.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 4px 24px rgba(15,23,42,.08);padding:10px 0;border-bottom-color:rgba(255,255,255,.6);}
.site-header.scrolled .logo-text{color:var(--dark);}
.site-header.scrolled .logo-text span{color:var(--primary);}
.site-header.scrolled .nav-link{color:var(--text);}
.site-header.scrolled .nav-link.active{color:var(--primary);}
.site-header.scrolled .nav-link::after{background:var(--primary);}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:6px;cursor:pointer;color:#fff;transition:var(--transition);z-index:1005;}
.nav-toggle span{width:24px;height:2px;background:currentColor;border-radius:2px;transition:var(--transition);}
.site-header.scrolled .nav-toggle{color:var(--dark);}
.page-hero{position:relative;padding:170px 0 84px;background-size:cover;background-position:center;display:flex;align-items:center;min-height:380px;}
.page-hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,23,42,.9),rgba(29,111,224,.66));}
.page-hero-inner{position:relative;z-index:2;color:#fff;width:100%;}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.8);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb a{color:rgba(255,255,255,.85);transition:var(--transition);}
.breadcrumb a:hover{color:#fff;}
.breadcrumb-sep{opacity:.5;}
.page-hero-title{font-size:clamp(24px,4vw,38px);font-weight:800;line-height:1.35;margin-bottom:18px;max-width:820px;letter-spacing:-.5px;}
.page-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.hero-badge{display:inline-flex;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);color:#fff;font-size:13px;font-weight:600;padding:5px 14px;border-radius:50px;backdrop-filter:blur(4px);}
.hero-time{font-size:14px;color:rgba(255,255,255,.82);display:inline-flex;align-items:center;gap:6px;}
.hero-time::before{content:'';width:5px;height:5px;border-radius:50%;background:var(--secondary);display:inline-block;}
.hero-dots{font-size:14px;color:rgba(255,255,255,.75);}
.page-main{padding:60px 0 76px;background:var(--bg);}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:40px;align-items:start;}
.article-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:40px;overflow:hidden;}
.article-card-header{margin-bottom:28px;padding-bottom:22px;border-bottom:1px solid var(--border);}
.article-title{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.4;color:var(--dark);margin-bottom:14px;letter-spacing:-.3px;}
.article-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:14px;color:var(--muted);}
.article-meta .badge{background:var(--primary-light);color:var(--primary);}
.article-body{font-size:16px;line-height:1.95;color:var(--text);}
.article-body h2{font-size:24px;font-weight:700;margin:32px 0 14px;color:var(--dark);padding-bottom:8px;border-bottom:1px solid var(--border);}
.article-body h3{font-size:20px;font-weight:700;margin:28px 0 12px;color:var(--dark);}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px;color:var(--dark);}
.article-body p{margin-bottom:18px;}
.article-body ul,.article-body ol{margin:0 0 20px 22px;list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:6px;}
.article-body a{color:var(--primary);border-bottom:1px solid transparent;transition:var(--transition);}
.article-body a:hover{border-bottom-color:var(--primary);}
.article-body blockquote{border-left:4px solid var(--primary);background:var(--primary-light);padding:16px 22px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:22px 0;color:var(--text);}
.article-body img{border-radius:var(--radius-sm);margin:20px 0;box-shadow:var(--shadow-sm);}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;}
.article-body th,.article-body td{border:1px solid var(--border);padding:10px 12px;text-align:left;}
.article-body th{background:var(--primary-light);color:var(--dark);font-weight:600;}
.article-none{text-align:center;padding:60px 20px;}
.article-none .none-icon{width:72px;height:72px;border-radius:50%;background:var(--primary-light);color:var(--primary);font-size:32px;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;}
.article-none h2{font-size:26px;color:var(--dark);margin-bottom:12px;}
.article-none p{color:var(--muted);margin-bottom:24px;}
.side-column{display:flex;flex-direction:column;gap:24px;}
.side-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:24px;}
.side-title{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--primary-light);position:relative;display:flex;align-items:center;}
.side-title::before{content:'';width:4px;height:18px;border-radius:2px;background:linear-gradient(180deg,var(--primary),var(--secondary));margin-right:10px;}
.side-list li{padding:7px 0;border-bottom:1px dashed var(--border);}
.side-list li:last-child{border-bottom:none;}
.side-list a{display:flex;align-items:flex-start;gap:10px;color:var(--text);font-size:14px;line-height:1.7;transition:var(--transition);}
.side-list a:hover{color:var(--primary);transform:translateX(2px);}
.side-dot{width:6px;height:6px;border-radius:50%;background:var(--primary);flex-shrink:0;margin-top:8px;display:inline-block;}
.article-info-list{list-style:none;}
.article-info-list li{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px dashed var(--border);font-size:14px;color:var(--muted);}
.article-info-list li:last-child{border-bottom:none;}
.article-info-list strong{color:var(--text);font-weight:600;}
.article-info-list .green{color:var(--accent);}
.side-empty{color:var(--muted);font-size:14px;padding:8px 0;}
.side-card-img{border-radius:var(--radius);overflow:hidden;position:relative;}
.side-card-img img{width:100%;height:150px;object-fit:cover;}
.side-card-img .cover-overlay{position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(15,23,42,.55));display:flex;align-items:flex-end;padding:18px;}
.side-card-img span{color:#fff;font-size:14px;font-weight:600;z-index:1;}
.guarantee-section{background:var(--dark);color:#fff;padding:70px 0;position:relative;overflow:hidden;}
.guarantee-section::before{content:'';position:absolute;top:-120px;right:-80px;width:320px;height:320px;border-radius:50%;background:linear-gradient(135deg,rgba(29,111,224,.4),rgba(14,165,233,.15));}
.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;z-index:1;}
.guarantee-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:26px 20px;text-align:center;transition:var(--transition);}
.guarantee-item:hover{background:rgba(255,255,255,.1);transform:translateY(-4px);}
.guarantee-num{font-size:clamp(26px,3vw,40px);font-weight:800;background:linear-gradient(135deg,#fff 20%,rgba(255,255,255,.6));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:6px;line-height:1.2;}
.guarantee-item p{font-size:13px;color:rgba(255,255,255,.72);}
.related-section{background:var(--white);padding:76px 0;}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.related-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;text-decoration:none;transition:var(--transition);display:block;height:100%;}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);}
.related-card-img{position:relative;height:190px;overflow:hidden;}
.related-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.related-card:hover .related-card-img img{transform:scale(1.06);}
.related-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,0),rgba(15,23,42,.25));}
.related-badge{position:absolute;top:14px;left:14px;background:rgba(255,255,255,.9);backdrop-filter:blur(6px);color:var(--primary);font-size:12px;font-weight:600;padding:4px 12px;border-radius:50px;z-index:2;box-shadow:0 2px 8px rgba(15,23,42,.15);}
.related-card-body{padding:22px;display:flex;flex-direction:column;flex:1;}
.related-card-body h3{font-size:17px;font-weight:700;color:var(--dark);margin-bottom:10px;line-height:1.5;transition:var(--transition);}
.related-card:hover .related-card-body h3{color:var(--primary);}
.related-card-body p{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:16px;flex:1;}
.related-link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:var(--transition);}
.related-link i{font-style:normal;transition:transform .3s;}
.related-card:hover .related-link i{transform:translateX(4px);}
.faq-section{background:var(--bg);padding:76px 0;}
.faq-list{max-width:860px;margin:0 auto;}
.faq-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;overflow:hidden;transition:var(--transition);}
.faq-item:hover{box-shadow:var(--shadow);}
.faq-item summary{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;cursor:pointer;list-style:none;font-weight:600;font-size:15px;color:var(--dark);transition:var(--transition);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary);}
.faq-icon{font-size:24px;color:var(--primary);font-weight:400;transition:transform .3s ease;line-height:1;flex-shrink:0;margin-left:16px;}
details[open] .faq-icon{transform:rotate(45deg);}
.faq-a{padding:0 24px 20px;color:var(--muted);line-height:1.85;font-size:15px;}
.cta-section{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 100%);color:#fff;padding:68px 0;position:relative;overflow:hidden;}
.cta-section::before{content:'';position:absolute;top:-70px;right:-70px;width:220px;height:220px;border-radius:50%;background:rgba(14,165,233,.22);}
.cta-section::after{content:'';position:absolute;bottom:-90px;left:10%;width:180px;height:180px;border-radius:50%;background:rgba(29,111,224,.18);}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;position:relative;z-index:1;flex-wrap:wrap;}
.cta-content{max-width:560px;}
.cta-title{font-size:clamp(22px,2.8vw,32px);font-weight:800;line-height:1.4;margin-bottom:12px;letter-spacing:-.3px;}
.cta-desc{font-size:15px;color:rgba(255,255,255,.78);line-height:1.7;}
.site-footer{background:var(--dark);color:rgba(255,255,255,.78);padding:60px 0 0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:44px;padding-bottom:40px;}
.footer-brand .logo-text{color:#fff;font-size:20px;}
.footer-brand .logo-badge{background:linear-gradient(135deg,var(--primary),var(--secondary));}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:340px;}
.footer-title{font-size:16px;font-weight:700;color:#fff;margin-bottom:18px;position:relative;padding-bottom:8px;}
.footer-title::after{content:'';position:absolute;left:0;bottom:0;width:28px;height:3px;border-radius:3px;background:linear-gradient(90deg,var(--primary),var(--secondary));}
.footer-links{list-style:none;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:rgba(255,255,255,.7);font-size:14px;transition:var(--transition);}
.footer-links a:hover{color:#fff;padding-left:4px;}
.footer-contact{font-size:14px;line-height:2;color:rgba(255,255,255,.68);}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;border-top:1px solid rgba(255,255,255,.1);padding:20px 0 22px;font-size:13px;color:rgba(255,255,255,.5);}
@media (max-width: 1024px){
    .article-layout{grid-template-columns:1fr;}
    .related-grid{grid-template-columns:repeat(2,1fr);}
    .guarantee-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width: 992px){
    .main-nav{position:fixed;top:0;right:-100%;width:280px;height:100vh;background:#fff;flex-direction:column;gap:6px;padding:90px 28px 28px;box-shadow:var(--shadow-lg);transition:right .4s ease;z-index:998;}
    .main-nav.open{right:0;}
    .nav-link{color:var(--text)!important;font-size:16px;font-weight:500;display:block;padding:12px 0;border-bottom:1px solid var(--border);border-radius:0;}
    .nav-link.active{color:var(--primary)!important;}
    .nav-link::after{display:none;}
    .nav-cta{margin-top:14px;width:100%;}
    .nav-toggle{display:flex;}
    .nav-toggle.active{color:var(--dark);}
    .page-hero{padding:150px 0 64px;min-height:330px;}
    .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width: 768px){
    .section{padding:56px 0;}
    .related-section{padding:56px 0;}
    .faq-section{padding:56px 0;}
    .page-main{padding:44px 0 56px;}
    .article-card{padding:26px 20px;}
    .article-title{font-size:22px;}
    .related-grid{grid-template-columns:1fr;}
    .guarantee-grid{grid-template-columns:1fr 1fr;gap:16px;}
    .cta-inner{flex-direction:column;text-align:center;justify-content:center;}
    .footer-grid{grid-template-columns:1fr;gap:36px;}
    .footer-bottom{flex-direction:column;text-align:center;}
}
@media (max-width: 520px){
    .container{padding:0 16px;}
    .logo-text{font-size:17px;}
    .logo-badge{width:32px;height:32px;font-size:15px;border-radius:8px;}
    .page-hero{padding:140px 0 48px;min-height:300px;}
    .page-hero-title{font-size:22px;}
    .article-meta{flex-direction:column;align-items:flex-start;gap:6px;}
    .guarantee-grid{grid-template-columns:1fr;}
    .article-body{font-size:15px;}
    .faq-item summary{font-size:14px;padding:16px 18px;}
    .faq-a{padding:0 18px 16px;font-size:14px;}
    .section-title{font-size:24px;}
}

/* roulang page: category2 */
:root {
            --primary: #0e7c6b;
            --primary-dark: #0a5c50;
            --primary-light: #2dd4bf;
            --accent: #0ea5e9;
            --bg: #f4f7f6;
            --white: #ffffff;
            --text: #152b31;
            --text-soft: #415861;
            --muted: #6b7f88;
            --border: #dfe9e6;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(10, 60, 50, .08);
            --shadow-lg: 0 20px 45px rgba(10, 60, 50, .14);
            --section-pad: 90px 0;
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --transition: all .3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            width: min(1200px, 92%);
            margin: 0 auto;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(223, 233, 230, .65);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, .94);
            box-shadow: 0 4px 24px rgba(10, 60, 50, .09);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: .2px;
        }
        .logo-badge {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            display: grid;
            place-items: center;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 14px rgba(14, 124, 107, .32);
            flex-shrink: 0;
        }
        .logo-text {
            color: var(--text);
        }
        .logo-text span {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-soft);
            padding: 8px 2px;
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 6px 18px rgba(14, 124, 107, .25);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(14, 124, 107, .32);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(14, 124, 107, .08);
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .category-hero {
            padding: 170px 0 90px;
            background: linear-gradient(135deg, rgba(9, 52, 43, .92), rgba(14, 124, 107, .78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            position: relative;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .82);
            margin-bottom: 22px;
        }
        .breadcrumb a {
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .breadcrumb i {
            font-size: 12px;
            opacity: .7;
        }
        .category-hero h1 {
            font-size: 44px;
            line-height: 1.22;
            font-weight: 800;
            max-width: 760px;
            margin-bottom: 18px;
            letter-spacing: .5px;
        }
        .category-hero .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            max-width: 640px;
            opacity: .9;
            margin-bottom: 32px;
        }
        .hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }
        .btn-primary {
            background: var(--white);
            color: var(--primary);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, .16);
        }
        .btn-light {
            background: rgba(255, 255, 255, .15);
            color: #fff;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, .32);
        }
        .btn-light:hover {
            background: rgba(255, 255, 255, .26);
            transform: translateY(-2px);
        }
        .section {
            padding: var(--section-pad);
        }
        .section-alt {
            background: var(--white);
        }
        .section-head {
            text-align: center;
            max-width: 740px;
            margin: 0 auto 52px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(14, 124, 107, .1);
            padding: 6px 18px;
            border-radius: 50px;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: .3px;
        }
        .section-head p {
            color: var(--muted);
            font-size: 16px;
            line-height: 1.8;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        .stat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .stat-icon {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .stat-number {
            font-size: 38px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
        }
        .stat-unit {
            font-size: 16px;
            font-weight: 400;
            color: var(--muted);
            margin-left: 2px;
        }
        .stat-label {
            color: var(--muted);
            font-size: 14px;
            margin-top: 6px;
        }
        .risk-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .risk-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: flex;
            gap: 18px;
            transition: var(--transition);
        }
        .risk-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(14, 124, 107, .3);
        }
        .risk-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            font-size: 20px;
            background: rgba(239, 68, 68, .1);
            color: #ef4444;
            flex-shrink: 0;
        }
        .risk-card:nth-child(2) .risk-icon {
            background: rgba(245, 158, 11, .1);
            color: #f59e0b;
        }
        .risk-card:nth-child(3) .risk-icon {
            background: rgba(59, 130, 246, .1);
            color: #3b82f6;
        }
        .risk-card:nth-child(4) .risk-icon {
            background: rgba(139, 92, 246, .1);
            color: #8b5cf6;
        }
        .risk-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .risk-card p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
        }
        .protect-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .protect-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .protect-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 60, 50, .2), transparent 40%);
            pointer-events: none;
        }
        .protect-image img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }
        .protect-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .protect-item {
            display: flex;
            gap: 16px;
        }
        .protect-item .step-num {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: grid;
            place-items: center;
            font-weight: 700;
            font-size: 14px;
            flex-shrink: 0;
            margin-top: 3px;
            box-shadow: 0 4px 12px rgba(14, 124, 107, .22);
        }
        .protect-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }
        .protect-item p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: grid;
            place-items: center;
            margin: 0 auto 18px;
            box-shadow: 0 6px 16px rgba(14, 124, 107, .28);
        }
        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .step-card p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
        }
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tool-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: var(--transition);
        }
        .tool-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 124, 107, .35);
        }
        .tool-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: grid;
            place-items: center;
            font-size: 22px;
            background: rgba(14, 124, 107, .1);
            color: var(--primary);
            transition: var(--transition);
        }
        .tool-card:hover .tool-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(6deg) scale(1.05);
        }
        .tool-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
        }
        .tool-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            flex: 1;
        }
        .tool-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .tool-link:hover {
            gap: 10px;
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 28px;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(14, 124, 107, .35);
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .45s ease;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.85;
        }
        .faq-item.open .faq-answer {
            max-height: 320px;
            padding-top: 14px;
            margin-top: 14px;
            border-top: 1px dashed var(--border);
        }
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--accent)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            background-blend-mode: multiply;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 520px;
            height: 520px;
            background: rgba(255, 255, 255, .07);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: .3px;
        }
        .cta-section p {
            font-size: 16px;
            opacity: .92;
            margin-bottom: 30px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-btns .btn-primary {
            background: #fff;
            color: var(--primary);
        }
        .cta-btns .btn-light {
            background: rgba(255, 255, 255, .16);
            color: #fff;
        }
        .site-footer {
            background: #0b2420;
            color: #c1d5d0;
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo-text span {
            color: var(--primary-light);
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.85;
            color: #8ba6a0;
            max-width: 320px;
            margin-top: 14px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a {
            font-size: 14px;
            color: #8ba6a0;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-contact {
            font-size: 14px;
            color: #8ba6a0;
            line-height: 2.1;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #7a9891;
        }
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .protect-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-pad: 70px 0;
            }
            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 26px 24px;
                gap: 20px;
                align-items: flex-start;
                box-shadow: 0 20px 40px rgba(10, 60, 50, .14);
                transform: translateY(-130%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border);
                max-height: calc(100vh - 72px);
                overflow-y: auto;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                padding: 145px 0 64px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .risk-grid {
                grid-template-columns: 1fr;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-btns .btn {
                justify-content: center;
            }
            .protect-image img {
                height: 320px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .tools-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .section-head h2 {
                font-size: 23px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-btns {
                flex-direction: column;
                align-items: center;
            }
            .cta-btns .btn {
                width: 100%;
                justify-content: center;
            }
            .faq-item {
                padding: 18px 20px;
            }
            .faq-question {
                font-size: 15px;
            }
        }

/* roulang page: category3 */
:root {
        --primary: #0e7a86;
        --primary-dark: #0a5d66;
        --primary-light: #e4f2f4;
        --accent: #f0a83e;
        --accent-light: #fdf0dd;
        --bg: #f5fafb;
        --white: #ffffff;
        --text: #14282f;
        --text-weak: #5b7078;
        --border: #d9e8eb;
        --radius-lg: 18px;
        --radius-md: 12px;
        --radius-sm: 8px;
        --shadow-sm: 0 2px 10px rgba(14,122,134,.06);
        --shadow-md: 0 8px 28px rgba(14,122,134,.1);
        --shadow-lg: 0 18px 48px rgba(14,122,134,.14);
        --container: 1200px;
        --transition: .25s ease;
    }
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: color var(--transition);
    }
    img {
        max-width: 100%;
        display: block;
    }
    button,
    input {
        font-family: inherit;
        border: none;
        outline: none;
        background: none;
    }
    .container {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, .76);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(217, 232, 235, .7);
        box-shadow: 0 4px 24px rgba(14, 122, 134, .06);
        transition: background var(--transition), box-shadow var(--transition);
    }
    .site-header.scrolled {
        background: rgba(255, 255, 255, .94);
        box-shadow: 0 8px 30px rgba(14, 122, 134, .1);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 74px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .logo-badge {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), #17a2ae);
        color: #fff;
        font-size: 20px;
        font-weight: 700;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 6px 16px rgba(14, 122, 134, .24);
    }
    .logo-text {
        font-size: 20px;
        font-weight: 700;
        color: var(--text);
        letter-spacing: .5px;
    }
    .logo-text span {
        color: var(--primary);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 30px;
    }
    .nav-link {
        font-size: 15px;
        font-weight: 500;
        color: var(--text);
        position: relative;
        padding: 6px 2px;
    }
    .nav-link::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 0;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
        transition: width var(--transition);
    }
    .nav-link:hover {
        color: var(--primary);
    }
    .nav-link:hover::after,
    .nav-link.active::after {
        width: 100%;
    }
    .nav-link.active {
        color: var(--primary);
        font-weight: 600;
    }
    .nav-cta {
        background: var(--primary);
        color: #fff;
        padding: 10px 24px;
        border-radius: 50px;
        font-size: 14px;
        font-weight: 600;
        letter-spacing: .5px;
        box-shadow: 0 6px 18px rgba(14, 122, 134, .26);
        transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    }
    .nav-cta:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 10px 24px rgba(14, 122, 134, .3);
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        cursor: pointer;
        transition: background var(--transition);
    }
    .nav-toggle:hover {
        background: var(--primary-light);
    }
    .nav-toggle span {
        width: 22px;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
        transition: transform .3s, opacity .3s, background .3s;
    }
    .nav-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
        background: var(--primary);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
        background: var(--primary);
    }

    .page-hero {
        position: relative;
        padding: 168px 0 88px;
        background-size: cover;
        background-position: center;
        overflow: hidden;
    }
    .page-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(120deg, rgba(5, 32, 38, .82) 0%, rgba(10, 70, 78, .66) 55%, rgba(14, 122, 134, .42) 100%);
        z-index: 1;
    }
    .page-hero .container {
        position: relative;
        z-index: 2;
    }
    .hero-content {
        max-width: 760px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, .16);
        border: 1px solid rgba(255, 255, 255, .3);
        color: #fff;
        font-size: 13px;
        font-weight: 600;
        padding: 6px 18px;
        border-radius: 50px;
        letter-spacing: 1px;
        margin-bottom: 22px;
        backdrop-filter: blur(8px);
    }
    .hero-badge::before {
        content: "";
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--accent);
    }
    .page-hero h1 {
        font-size: 46px;
        line-height: 1.2;
        font-weight: 800;
        color: #fff;
        margin-bottom: 18px;
        letter-spacing: 1px;
    }
    .page-hero h1 span {
        color: #7fe3e8;
    }
    .page-hero p {
        font-size: 17px;
        line-height: 1.8;
        color: rgba(255, 255, 255, .86);
        margin-bottom: 34px;
        max-width: 620px;
    }
    .search-box {
        display: flex;
        background: #fff;
        border-radius: 60px;
        padding: 8px 8px 8px 22px;
        max-width: 540px;
        box-shadow: 0 16px 40px rgba(0, 0, 0, .18);
        gap: 12px;
    }
    .search-box input {
        flex: 1;
        font-size: 15px;
        color: var(--text);
    }
    .search-box input::placeholder {
        color: #98adb4;
    }
    .search-box button {
        background: var(--primary);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        padding: 12px 28px;
        border-radius: 50px;
        cursor: pointer;
        transition: background var(--transition), transform var(--transition);
        flex-shrink: 0;
    }
    .search-box button:hover {
        background: var(--primary-dark);
        transform: translateY(-1px);
    }
    .search-box button:focus,
    .search-box input:focus {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
        border-radius: 50px;
    }
    .hero-meta {
        display: flex;
        gap: 28px;
        margin-top: 38px;
        flex-wrap: wrap;
    }
    .hero-meta-item {
        display: flex;
        align-items: center;
        gap: 8px;
        color: rgba(255, 255, 255, .82);
        font-size: 14px;
    }
    .hero-meta-item i {
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--accent);
        display: inline-block;
    }

    .section-pad {
        padding: 90px 0;
    }
    .section-head {
        text-align: center;
        max-width: 640px;
        margin: 0 auto 52px;
    }
    .section-label {
        display: inline-block;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 13px;
        font-weight: 600;
        padding: 6px 18px;
        border-radius: 50px;
        letter-spacing: 1px;
        margin-bottom: 14px;
    }
    .section-head h2 {
        font-size: 34px;
        font-weight: 800;
        color: var(--text);
        margin-bottom: 12px;
        line-height: 1.3;
    }
    .section-head p {
        color: var(--text-weak);
        font-size: 16px;
        line-height: 1.7;
    }

    .cat-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .cat-card {
        background: var(--white);
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }
    .cat-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(14, 122, 134, .3);
    }
    .cat-cover {
        height: 178px;
        background-size: cover;
        background-position: center;
        position: relative;
    }
    .cat-cover::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 40%, rgba(6, 35, 40, .24));
    }
    .cat-body {
        padding: 28px 28px 30px;
    }
    .cat-body h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 10px;
    }
    .cat-body p {
        color: var(--text-weak);
        font-size: 14px;
        line-height: 1.7;
        margin-bottom: 18px;
    }
    .cat-link {
        color: var(--primary);
        font-size: 14px;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: gap var(--transition);
    }
    .cat-card:hover .cat-link {
        gap: 10px;
    }
    .cat-link::after {
        content: "→";
        transition: transform var(--transition);
    }

    .faq-section {
        background: var(--white);
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }
    .faq-layout {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    .faq-group {
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 32px;
    }
    .faq-group h3 {
        font-size: 20px;
        font-weight: 700;
        color: var(--primary-dark);
        margin-bottom: 22px;
        padding-bottom: 16px;
        border-bottom: 2px solid var(--primary);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .faq-group h3 .g-icon {
        width: 32px;
        height: 32px;
        border-radius: 10px;
        background: var(--primary-light);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        color: var(--primary);
    }
    .faq-item {
        background: var(--white);
        border-radius: var(--radius-md);
        border: 1px solid var(--border);
        margin-bottom: 14px;
        overflow: hidden;
        transition: border-color var(--transition), box-shadow var(--transition);
    }
    .faq-item:last-child {
        margin-bottom: 0;
    }
    .faq-item.open {
        border-color: rgba(14, 122, 134, .4);
        box-shadow: var(--shadow-sm);
    }
    .faq-q {
        width: 100%;
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 18px 20px;
        font-size: 15px;
        font-weight: 600;
        color: var(--text);
        cursor: pointer;
        text-align: left;
        transition: background var(--transition);
    }
    .faq-q:hover {
        background: var(--primary-light);
    }
    .faq-q .q-icon {
        width: 22px;
        height: 22px;
        border-radius: 7px;
        background: var(--primary);
        color: #fff;
        font-size: 12px;
        font-weight: 700;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        margin-top: 2px;
    }
    .faq-q .q-arrow {
        margin-left: auto;
        font-size: 16px;
        color: var(--text-weak);
        transition: transform .3s, color .3s;
        flex-shrink: 0;
        margin-top: 2px;
    }
    .faq-item.open .q-arrow {
        transform: rotate(45deg);
        color: var(--primary);
    }
    .faq-a {
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s ease, padding .35s ease;
        padding: 0 20px;
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.8;
    }
    .faq-item.open .faq-a {
        max-height: 400px;
        padding: 0 20px 20px 54px;
    }

    .stats-section {
        background: linear-gradient(135deg, #0a5d66 0%, #0e7a86 60%, #16a2ae 100%);
        position: relative;
        overflow: hidden;
    }
    .stats-section::before {
        content: "";
        position: absolute;
        top: -60%;
        right: -10%;
        width: 460px;
        height: 460px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .05);
    }
    .stats-section::after {
        content: "";
        position: absolute;
        bottom: -40%;
        left: 10%;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .03);
    }
    .stats-section .container {
        position: relative;
        z-index: 2;
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 30px;
        padding: 20px 0;
    }
    .stat-item {
        text-align: center;
        padding: 30px 20px;
        border-radius: var(--radius-lg);
        background: rgba(255, 255, 255, .08);
        border: 1px solid rgba(255, 255, 255, .12);
        backdrop-filter: blur(6px);
        transition: background var(--transition), transform var(--transition);
    }
    .stat-item:hover {
        background: rgba(255, 255, 255, .14);
        transform: translateY(-4px);
    }
    .stat-item strong {
        display: block;
        font-size: 40px;
        font-weight: 800;
        color: #fff;
        line-height: 1.2;
        margin-bottom: 6px;
        letter-spacing: 1px;
    }
    .stat-item span {
        font-size: 14px;
        color: rgba(255, 255, 255, .8);
        letter-spacing: 1px;
    }

    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
        position: relative;
    }
    .steps-grid::before {
        content: "";
        position: absolute;
        top: 40px;
        left: 10%;
        right: 10%;
        height: 2px;
        background: linear-gradient(90deg, var(--primary-light), var(--primary), var(--primary-light));
        border-radius: 2px;
        z-index: 0;
    }
    .step-item {
        background: var(--white);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 34px 28px;
        text-align: center;
        box-shadow: var(--shadow-sm);
        position: relative;
        z-index: 1;
        transition: transform var(--transition), box-shadow var(--transition);
    }
    .step-item:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
    }
    .step-num {
        width: 52px;
        height: 52px;
        border-radius: 16px;
        background: var(--primary);
        color: #fff;
        font-size: 18px;
        font-weight: 800;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 20px;
        box-shadow: 0 8px 22px rgba(14, 122, 134, .28);
    }
    .step-item:nth-child(2) .step-num {
        background: var(--accent);
        box-shadow: 0 8px 22px rgba(240, 168, 62, .3);
    }
    .step-item:nth-child(3) .step-num {
        background: #3f9f8f;
    }
    .step-item:nth-child(4) .step-num {
        background: #5b7fa6;
    }
    .step-item h3 {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 10px;
    }
    .step-item p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
    }

    .cta-section {
        padding: 80px 0;
    }
    .cta-card {
        background: linear-gradient(120deg, #0a5d66, #0e7a86, #1595a0);
        border-radius: 24px;
        padding: 52px 56px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        box-shadow: 0 20px 50px rgba(14, 122, 134, .3);
        position: relative;
        overflow: hidden;
    }
    .cta-card::after {
        content: "";
        position: absolute;
        top: -80px;
        right: -40px;
        width: 260px;
        height: 260px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .07);
    }
    .cta-info h2 {
        font-size: 30px;
        color: #fff;
        font-weight: 800;
        margin-bottom: 12px;
        letter-spacing: .5px;
    }
    .cta-info p {
        color: rgba(255, 255, 255, .85);
        font-size: 16px;
    }
    .cta-actions {
        display: flex;
        gap: 16px;
        flex-shrink: 0;
        position: relative;
        z-index: 2;
    }
    .btn-primary {
        background: #fff;
        color: var(--primary);
        font-size: 15px;
        font-weight: 700;
        padding: 14px 30px;
        border-radius: 50px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, .14);
        transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 28px rgba(0, 0, 0, .18);
        background: var(--primary-light);
    }
    .btn-ghost {
        background: transparent;
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        padding: 14px 30px;
        border-radius: 50px;
        border: 1.5px solid rgba(255, 255, 255, .5);
        transition: background var(--transition), border-color var(--transition), transform var(--transition);
    }
    .btn-ghost:hover {
        background: rgba(255, 255, 255, .12);
        border-color: #fff;
        transform: translateY(-2px);
    }

    .site-footer {
        background: #0b2830;
        color: rgba(255, 255, 255, .75);
        padding-top: 70px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1.4fr;
        gap: 50px;
        padding-bottom: 46px;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
    }
    .footer-brand .logo .logo-badge {
        background: linear-gradient(135deg, #0e7a86, #1ba6b2);
    }
    .footer-brand .logo .logo-text {
        color: #fff;
    }
    .footer-brand .logo .logo-text span {
        color: #79dde4;
    }
    .footer-desc {
        margin-top: 18px;
        font-size: 14px;
        line-height: 1.8;
        color: rgba(255, 255, 255, .6);
        max-width: 300px;
    }
    .footer-title {
        color: #fff;
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 20px;
        letter-spacing: .5px;
    }
    .footer-links {
        list-style: none;
    }
    .footer-links li {
        margin-bottom: 12px;
    }
    .footer-links a {
        font-size: 14px;
        color: rgba(255, 255, 255, .65);
        transition: color var(--transition), padding-left var(--transition);
    }
    .footer-links a:hover {
        color: #fff;
        padding-left: 6px;
    }
    .footer-contact {
        font-size: 14px;
        line-height: 2.2;
        color: rgba(255, 255, 255, .65);
    }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
        padding: 24px 0;
        font-size: 13px;
        color: rgba(255, 255, 255, .4);
    }

    .faq-no-result {
        display: none;
        text-align: center;
        padding: 32px;
        color: var(--text-weak);
        font-size: 15px;
        background: var(--primary-light);
        border-radius: var(--radius-md);
        margin-top: 24px;
    }
    .faq-no-result.show {
        display: block;
    }

    @media (max-width: 1024px) {
        .page-hero {
            padding: 150px 0 70px;
        }
        .page-hero h1 {
            font-size: 38px;
        }
        .cat-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .steps-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .steps-grid::before {
            display: none;
        }
        .faq-layout {
            grid-template-columns: 1fr;
        }
        .cta-card {
            flex-direction: column;
            padding: 40px 30px;
            text-align: center;
        }
    }

    @media (max-width: 920px) {
        .nav-toggle {
            display: flex;
        }
        .main-nav {
            position: absolute;
            top: 74px;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, .97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            flex-direction: column;
            align-items: flex-start;
            gap: 6px;
            padding: 20px 24px 24px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            display: none;
        }
        .main-nav.open {
            display: flex;
        }
        .main-nav .nav-link {
            font-size: 16px;
            padding: 10px 4px;
            width: 100%;
        }
        .main-nav .nav-cta {
            margin-top: 12px;
            width: 100%;
            text-align: center;
        }
        .main-nav .nav-link::after {
            display: none;
        }
        .main-nav .nav-link.active {
            background: var(--primary-light);
            border-radius: 8px;
            padding: 10px 14px;
        }
    }

    @media (max-width: 768px) {
        .container {
            padding: 0 18px;
        }
        .hero-meta {
            gap: 16px;
        }
        .section-pad {
            padding: 64px 0;
        }
        .section-head h2 {
            font-size: 28px;
        }
        .cat-grid {
            grid-template-columns: 1fr;
        }
        .faq-layout {
            gap: 24px;
        }
        .faq-group {
            padding: 24px 20px;
        }
        .faq-group h3 {
            font-size: 18px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 36px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .cta-actions {
            flex-direction: column;
            width: 100%;
        }
        .cta-actions .btn-primary,
        .cta-actions .btn-ghost {
            text-align: center;
        }
        .footer-bottom span {
            font-size: 12px;
        }
    }

    @media (max-width: 520px) {
        body {
            font-size: 15px;
        }
        .header-inner {
            height: 64px;
        }
        .logo-badge {
            width: 34px;
            height: 34px;
            font-size: 16px;
            border-radius: 10px;
        }
        .logo-text {
            font-size: 17px;
        }
        .main-nav {
            top: 64px;
        }
        .page-hero {
            padding: 130px 0 56px;
        }
        .page-hero h1 {
            font-size: 30px;
        }
        .page-hero p {
            font-size: 15px;
        }
        .search-box {
            flex-direction: column;
            border-radius: 18px;
            padding: 12px;
        }
        .search-box input {
            padding: 10px 8px;
        }
        .search-box button {
            width: 100%;
        }
        .stats-grid {
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .stat-item {
            padding: 20px 12px;
        }
        .stat-item strong {
            font-size: 30px;
        }
        .steps-grid {
            grid-template-columns: 1fr;
        }
        .faq-a {
            font-size: 13px;
        }
        .faq-q {
            padding: 14px 16px;
            font-size: 14px;
        }
        .cta-card {
            padding: 32px 24px;
        }
        .cta-info h2 {
            font-size: 24px;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
            transition: none !important;
            animation: none !important;
        }
    }