/* roulang page: index */
:root {
    --primary: #6C63FF;
    --primary-dark: #5549D9;
    --primary-light: #EDEBFF;
    --secondary: #00C9A7;
    --accent: #FFB547;
    --dark-bg: #0B1220;
    --dark-card: #131C30;
    --light-bg: #F7F9FC;
    --card-bg: #FFFFFF;
    --text: #1A2233;
    --text-muted: #5B6B7F;
    --border: #E3E9F2;
    --shadow-sm: 0 2px 8px rgba(10,20,40,0.06);
    --shadow-md: 0 8px 28px rgba(10,20,40,0.08);
    --shadow-lg: 0 20px 56px rgba(10,20,40,0.14);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --gap: 32px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--light-bg);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color .25s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
p { margin: 0 0 16px; }
h1, h2, h3, h4, h5, h6 { margin: 0 0 12px; line-height: 1.3; font-weight: 700; color: var(--text); }
ul, ol { margin: 0 0 16px; padding-left: 20px; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section { padding: 88px 0; }
.section-alt { background: var(--card-bg); }

.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .5px;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 14px;
}

.section-title {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 12px;
}

.section-sub {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.6;
}

/* ---------- Header / Nav ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .3s ease;
}

.site-header.scrolled { box-shadow: var(--shadow-md); }

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
}

.nav-logo .logo-mark {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    font-weight: 900;
    box-shadow: 0 4px 12px rgba(108,99,255,0.35);
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 32px;
}

.nav-menu .nav-item { list-style: none; }

.nav-menu .nav-link {
    position: relative;
    display: inline-block;
    padding: 8px 2px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    transition: color .25s ease;
}

.nav-menu .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .3s ease;
}

.nav-menu .nav-link:hover { color: var(--text); }
.nav-menu .nav-link:hover::after { transform: scaleX(1); }

.nav-menu .nav-link.active { color: var(--primary); font-weight: 600; }
.nav-menu .nav-link.active::after { transform: scaleX(1); }

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 22px;
    border-radius: 999px;
    box-shadow: 0 4px 16px rgba(108,99,255,0.3);
    transition: all .3s ease;
}

.nav-cta:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(108,99,255,0.4);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all .3s ease;
}

.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); }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    background: linear-gradient(120deg, rgba(11,18,32,0.92), rgba(30,27,75,0.78)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    background-size: cover;
    padding: 130px 0 110px;
    color: #fff;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: -120px;
    right: -120px;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,201,167,0.25), transparent 70%);
    pointer-events: none;
}

.hero-content { max-width: 720px; position: relative; z-index: 2; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.18);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    padding: 7px 18px;
    border-radius: 999px;
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
}

.hero-badge i { color: var(--secondary); }

.hero-title {
    font-size: 52px;
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -2px;
    color: #fff;
    margin-bottom: 18px;
}

.hero-title span {
    background: linear-gradient(120deg, var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255,255,255,0.82);
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all .3s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 20px rgba(108,99,255,0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(108,99,255,0.5);
}

.btn-ghost {
    background: rgba(255,255,255,0.08);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.28);
    backdrop-filter: blur(4px);
}

.btn-ghost:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: rgba(255,255,255,0.5);
    transform: translateY(-3px);
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    padding-top: 10px;
}

.hero-meta-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255,255,255,0.75);
}

.hero-meta-item i { color: var(--secondary); font-size: 16px; }

/* ---------- Advantages ---------- */
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.advantage-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    box-shadow: var(--shadow-sm);
    transition: all .35s ease;
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(108,99,255,0.3);
}

.advantage-icon {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 18px;
    background: var(--primary-light);
    color: var(--primary);
}

.advantage-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.advantage-text { color: var(--text-muted); font-size: 14px; line-height: 1.65; margin: 0; }

/* ---------- Features ---------- */
.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 72px;
}

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

.feature-row.reverse .feature-media { order: 2; }
.feature-row.reverse .feature-content { order: 1; }

.feature-media { position: relative; }

.feature-media img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    object-fit: cover;
    aspect-ratio: 4/3;
}

.feature-media::after {
    content: "";
    position: absolute;
    inset: 16px -16px -16px 16px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(108,99,255,0.12), rgba(0,201,167,0.1));
    z-index: -1;
}

.feature-content { padding: 20px 0; }

.feature-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
}

.feature-content h3 { font-size: 26px; font-weight: 800; margin-bottom: 12px; }

.feature-list { margin: 0; padding: 0; list-style: none; }

.feature-list li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 8px 0;
    font-size: 15px;
    color: var(--text);
}

.feature-list li i { color: var(--secondary); margin-top: 5px; font-size: 14px; }

/* ---------- News / CMS List ---------- */
.section-news { background: var(--dark-bg); color: #fff; }

.section-news .section-tag { background: rgba(108,99,255,0.2); color: #b0a8ff; }
.section-news .section-title { color: #fff; }
.section-news .section-sub { color: rgba(255,255,255,0.6); }

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

.news-card {
    display: flex;
    flex-direction: column;
    background: var(--dark-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: 28px 26px;
    text-decoration: none;
    transition: all .35s ease;
    height: 100%;
}

.news-card:hover {
    transform: translateY(-6px);
    border-color: rgba(108,99,255,0.45);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35);
    background: #18223a;
}

.news-card:hover .news-card__more { color: var(--secondary); }

.news-card__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.news-card__cat {
    display: inline-block;
    background: rgba(108,99,255,0.2);
    color: #b0a8ff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
}

.news-card__time {
    color: rgba(255,255,255,0.4);
    font-size: 13px;
}

.news-card__title {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card__excerpt {
    color: rgba(255,255,255,0.6);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card__more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: #a0a8c0;
    transition: color .3s ease;
}

.news-card__more i { font-size: 12px; }

.no-news {
    background: rgba(255,255,255,0.05);
    border: 1px dashed rgba(255,255,255,0.2);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    color: rgba(255,255,255,0.7);
    font-size: 16px;
    grid-column: 1 / -1;
}

/* ---------- Stats ---------- */
.stats-band {
    background: linear-gradient(120deg, var(--dark-bg), #141d35);
    border-radius: var(--radius-lg);
    padding: 56px 40px;
    box-shadow: var(--shadow-lg);
}

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }

.stat-item { padding: 16px 8px; }

.stat-number {
    font-size: 42px;
    font-weight: 900;
    background: linear-gradient(120deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.stat-label {
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
}

/* ---------- Process ---------- */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: step; }

.process-step {
    position: relative;
    text-align: center;
    padding: 20px 12px 0;
}

.process-step::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    display: block;
    font-size: 28px;
    font-weight: 900;
    color: var(--primary);
    opacity: 0.18;
    letter-spacing: -1px;
    margin-bottom: 12px;
}

.step-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    border-radius: 16px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.step-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-text {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 200px;
    margin: 0 auto;
}

.process-line {
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin: 40px 0 0;
    opacity: 0.25;
}

/* ---------- FAQ ---------- */
.faq-panel { max-width: 760px; margin: 0 auto; }

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color .3s ease, box-shadow .3s ease;
}

.faq-item:hover {
    border-color: rgba(108,99,255,0.3);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    background: none;
    border: none;
    padding: 20px 24px;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    transition: color .3s ease;
}

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

.faq-question i {
    flex-shrink: 0;
    color: var(--primary);
    font-size: 14px;
    transition: transform .3s ease;
}

.faq-item.open .faq-question i { transform: rotate(45deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s ease;
    padding: 0 24px;
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.7;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}

/* ---------- CTA ---------- */
.cta-band {
    position: relative;
    background: linear-gradient(120deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-lg);
    padding: 64px 48px;
    text-align: center;
    color: #fff;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.cta-band::before {
    content: "";
    position: absolute;
    top: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
}

.cta-band::after {
    content: "";
    position: absolute;
    bottom: -80px;
    left: -30px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
}

.cta-title {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
    z-index: 2;
}

.cta-text {
    font-size: 16px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 28px;
    position: relative;
    z-index: 2;
}

.btn-light {
    background: #fff;
    color: var(--primary);
    font-weight: 700;
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    position: relative;
    z-index: 2;
}

.btn-light:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.25);
}

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

.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .nav-logo { margin-bottom: 16px; color: #fff; }

.footer-brand .nav-logo .logo-mark {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.footer-brand-text {
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255,255,255,0.55);
    max-width: 320px;
}

.footer-links h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-links ul { list-style: none; padding: 0; margin: 0; }

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

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 14px;
    text-decoration: none;
    transition: color .25s ease;
}

.footer-links a:hover { color: var(--secondary); }

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0 32px;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

.footer-bottom a { color: rgba(255,255,255,0.5); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-row { gap: 40px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
    .hero-title { font-size: 42px; }
    .section { padding: 72px 0; }
}

@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .hero { padding: 90px 0 80px; }
    .hero-title { font-size: 34px; }
    .hero-subtitle { font-size: 16px; }
    .feature-row { grid-template-columns: 1fr; gap: 32px; }
    .feature-row.reverse .feature-media { order: 1; }
    .feature-row.reverse .feature-content { order: 2; }
    .feature-media img { aspect-ratio: 16/10; }
    .footer-top { grid-template-columns: 1fr; gap: 32px; }
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
        gap: 18px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        transform: translateY(-120%);
        opacity: 0;
        transition: transform .35s ease, opacity .35s ease;
    }
    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
    }
    .nav-toggle { display: flex; }
    .nav-cta { display: none; }
    .news-grid { grid-template-columns: 1fr; }
    .stats-band { padding: 40px 24px; }
    .stat-number { font-size: 32px; }
    .cta-band { padding: 48px 24px; }
    .cta-title { font-size: 26px; }
}

@media (max-width: 520px) {
    .advantage-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr; gap: 32px; }
    .hero-meta { gap: 16px; flex-direction: column; }
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
    .news-card { padding: 22px 18px; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

/* roulang page: article */
:root {
    --primary: #0B1D3A;
    --secondary: #00B7A8;
    --accent: #FF6B4A;
    --bg: #F4F8FB;
    --bg-alt: #0E2238;
    --text: #1A2A3A;
    --text-light: #6B7A8D;
    --border: #E1EAF0;
    --white: #FFFFFF;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow: 0 10px 34px rgba(11, 29, 58, 0.08);
    --shadow-hover: 0 18px 46px rgba(11, 29, 58, 0.14);
    --transition: all 0.3s ease;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 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; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--primary); font-weight: 700; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.88); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; }
.logo-mark { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: var(--primary); color: #fff; border-radius: 12px; font-size: 20px; font-weight: 900; flex-shrink: 0; box-shadow: 0 4px 14px rgba(11,29,58,0.18); }
.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-item { list-style: none; }
.nav-link { position: relative; padding: 10px 16px; color: var(--text); font-weight: 500; font-size: 15px; border-radius: 8px; display: inline-block; }
.nav-link::after { content: ''; position: absolute; left: 16px; right: 16px; bottom: 4px; height: 2px; background: var(--secondary); border-radius: 2px; transform: scaleX(0); transition: var(--transition); }
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-cta { display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px; background: var(--primary); color: #fff; border-radius: 40px; font-size: 14px; font-weight: 600; transition: var(--transition); box-shadow: 0 4px 16px rgba(11,29,58,0.2); border: none; cursor: pointer; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 26px rgba(11,29,58,0.3); color: #fff; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; flex-direction: column; gap: 5px; width: 42px; height: 42px; justify-content: center; align-items: center; border-radius: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--transition); }
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Article Hero */
.article-hero { background: linear-gradient(135deg, rgba(11,29,58,0.94) 0%, rgba(16,52,78,0.82) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat; padding: 96px 0 76px; color: #fff; position: relative; overflow: hidden; }
.article-hero .container { position: relative; z-index: 2; text-align: center; }
.breadcrumb { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: 14px; margin-bottom: 28px; flex-wrap: wrap; color: rgba(255,255,255,0.6); }
.breadcrumb a { color: rgba(255,255,255,0.8); font-weight: 500; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .current { color: var(--secondary); }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(0,183,168,0.16); border: 1px solid rgba(0,183,168,0.35); color: var(--secondary); padding: 6px 18px; border-radius: 40px; font-size: 13px; font-weight: 600; letter-spacing: 0.4px; margin-bottom: 18px; }
.article-hero h1 { font-size: clamp(1.9rem, 4vw, 2.8rem); color: #fff; font-weight: 800; max-width: 860px; margin: 0 auto 24px; line-height: 1.35; letter-spacing: -0.5px; }
.article-meta { display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; font-size: 14px; color: rgba(255,255,255,0.7); }
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta i { color: var(--secondary); }

/* Article Main */
.article-section { padding: 70px 0 60px; }
.article-layout { display: flex; gap: 36px; align-items: flex-start; }
.article-main { flex: 1 1 0; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 44px 46px; border: 1px solid var(--border); min-width: 0; }
.article-sidebar { flex: 0 0 340px; position: sticky; top: 100px; }
.article-content { color: #33455A; font-size: 1.02rem; line-height: 1.9; word-break: break-word; }
.article-content h2 { font-size: 1.6rem; margin: 2rem 0 1rem; color: var(--primary); font-weight: 700; padding-bottom: 10px; border-bottom: 2px solid var(--border); }
.article-content h3 { font-size: 1.3rem; margin: 1.7rem 0 0.8rem; color: var(--primary); font-weight: 700; }
.article-content h4 { font-size: 1.1rem; margin: 1.5rem 0 0.6rem; color: var(--primary); font-weight: 600; }
.article-content p { margin: 1.1rem 0; }
.article-content a { color: var(--secondary); font-weight: 500; text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--primary); }
.article-content img { border-radius: var(--radius-sm); max-width: 100%; margin: 1.6rem 0; box-shadow: var(--shadow); }
.article-content ul { margin: 1.1rem 0 1.2rem 1.5rem; list-style: disc; }
.article-content ol { margin: 1.1rem 0 1.2rem 1.5rem; list-style: decimal; }
.article-content li { margin: 0.4rem 0; line-height: 1.8; }
.article-content blockquote { border-left: 4px solid var(--secondary); padding: 1.1rem 1.5rem; background: #EFFAF8; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 1.5rem 0; font-style: italic; color: #33455A; }
.article-content blockquote p { margin: 0; }
.article-content code { background: #EEF2F6; padding: 2px 8px; border-radius: 4px; font-family: 'SFMono-Regular', Consolas, monospace; font-size: 0.9em; color: #D6336C; }
.article-content pre { background: #0E2238; color: #E7F0FA; padding: 20px 24px; border-radius: var(--radius-sm); overflow-x: auto; margin: 1.5rem 0; font-size: 0.92rem; line-height: 1.7; }
.article-content pre code { background: none; color: inherit; padding: 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.95rem; }
.article-content table th { background: var(--bg); color: var(--primary); font-weight: 700; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: 10px 16px; text-align: left; }
.article-content hr { border: none; border-top: 1px solid var(--border); margin: 2.2rem 0; }

.article-tags { display: flex; align-items: center; gap: 8px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.article-tags .tag-label { font-weight: 700; color: var(--primary); font-size: 14px; margin-right: 4px; }
.tag-badge { display: inline-block; padding: 5px 14px; background: #EDF2F7; border-radius: 30px; font-size: 13px; color: var(--text); font-weight: 500; transition: var(--transition); border: 1px solid transparent; }
.tag-badge:hover { background: var(--secondary); color: #fff; border-color: var(--secondary); }

.article-not-found { text-align: center; padding: 70px 30px; }
.article-not-found i { font-size: 3.4rem; color: var(--border); margin-bottom: 20px; }
.article-not-found h2 { font-size: 2rem; margin-bottom: 12px; }
.article-not-found p { color: var(--text-light); font-size: 1.05rem; margin-bottom: 32px; max-width: 400px; margin-left: auto; margin-right: auto; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 40px; font-weight: 600; font-size: 15px; transition: var(--transition); border: 2px solid transparent; cursor: pointer; }
.btn-primary { background: var(--secondary); color: #fff; box-shadow: 0 6px 18px rgba(0,183,168,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,183,168,0.4); color: #fff; }
.btn-outline { border-color: rgba(255,255,255,0.6); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255,255,255,0.15); color: #fff; border-color: #fff; }
.btn-dark { background: var(--primary); color: #fff; box-shadow: 0 6px 18px rgba(11,29,58,0.25); }
.btn-dark:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(11,29,58,0.35); color: #fff; }

/* Sidebar */
.sidebar-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); padding: 28px; margin-bottom: 24px; }
.sidebar-card-dark { background: var(--bg-alt); border-color: var(--bg-alt); }
.sidebar-card-dark h3 { color: #fff; }
.sidebar-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.sidebar-card h3::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.sidebar-card-dark h3::after { background: rgba(255,255,255,0.15); }
.sidebar-brand { text-align: center; padding: 20px 0 10px; }
.sidebar-brand .logo-mark { width: 48px; height: 48px; font-size: 24px; margin: 0 auto 12px; }
.sidebar-brand p { color: rgba(255,255,255,0.68); font-size: 14px; line-height: 1.7; margin-top: 10px; }
.sidebar-link-list li { border-bottom: 1px solid var(--border); }
.sidebar-link-list li:last-child { border-bottom: none; }
.sidebar-link-list a { display: flex; align-items: center; justify-content: space-between; padding: 12px 2px; color: var(--text); font-size: 15px; font-weight: 500; }
.sidebar-link-list a:hover { color: var(--secondary); padding-left: 6px; }
.sidebar-link-list a i { font-size: 12px; color: var(--text-light); }
.sidebar-link-list a:hover i { color: var(--secondary); }
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* Related */
.related-section { padding: 70px 0; background: var(--white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { text-align: center; margin-bottom: 46px; }
.section-tag { display: inline-block; background: rgba(0,183,168,0.1); color: var(--secondary); padding: 5px 16px; border-radius: 30px; font-size: 13px; font-weight: 700; letter-spacing: 1px; margin-bottom: 12px; }
.section-head h2 { font-size: 2.2rem; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 10px; }
.section-head p { color: var(--text-light); font-size: 1rem; max-width: 560px; margin: 0 auto; }
.news-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: var(--transition); box-shadow: var(--shadow); height: 100%; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(0,183,168,0.3); }
.news-card-cover { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.news-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .news-card-cover img { transform: scale(1.06); }
.news-card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; gap: 12px; }
.badge { display: inline-block; padding: 4px 14px; background: rgba(0,183,168,0.12); color: var(--secondary); border-radius: 20px; font-size: 12px; font-weight: 700; letter-spacing: 0.3px; }
.news-card-body h3 { font-size: 1.08rem; font-weight: 700; line-height: 1.5; margin: 0; }
.news-card-body h3 a { color: var(--primary); }
.news-card-body h3 a:hover { color: var(--secondary); }
.news-card-body p.date { font-size: 13px; color: var(--text-light); margin-top: auto; display: flex; align-items: center; gap: 6px; }

/* FAQ */
.faq-section { padding: 80px 0; background: var(--bg); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { background: var(--white); border-radius: var(--radius-sm); border: 1px solid var(--border); margin-bottom: 14px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: rgba(0,183,168,0.3); box-shadow: var(--shadow); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--primary); cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 13px; color: var(--secondary); transition: var(--transition); }
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item[open] { border-color: rgba(0,183,168,0.4); box-shadow: var(--shadow); }
.faq-answer { padding: 0 24px 22px; color: var(--text-light); line-height: 1.9; font-size: 15px; }
.faq-answer p { margin: 0; }

/* CTA */
.cta-section { padding: 80px 0; background: linear-gradient(135deg, rgba(11,29,58,0.95) 0%, rgba(14,42,68,0.88) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat; color: #fff; text-align: center; }
.cta-section .cta-inner { max-width: 680px; margin: 0 auto; }
.cta-section h2 { font-size: 2.3rem; color: #fff; font-weight: 800; margin-bottom: 14px; letter-spacing: -0.5px; }
.cta-section p { color: rgba(255,255,255,0.75); font-size: 1.05rem; margin-bottom: 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-actions .btn { min-width: 160px; justify-content: center; }

/* Footer */
.site-footer { background: #081A2E; color: rgba(255,255,255,0.55); padding: 60px 0 24px; }
.footer-top { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 30px; border-bottom: 1px solid rgba(255,255,255,0.1); margin-bottom: 22px; flex-wrap: wrap; }
.footer-brand { max-width: 420px; }
.footer-brand .nav-logo { color: #fff; margin-bottom: 16px; }
.footer-brand .nav-logo .logo-mark { background: var(--secondary); }
.footer-brand-text { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.55); }
.footer-links h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.footer-links ul li { margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,0.55); font-size: 14px; transition: var(--transition); }
.footer-links a:hover { color: var(--secondary); padding-left: 4px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: rgba(255,255,255,0.4); flex-wrap: wrap; gap: 8px; padding-top: 16px; }
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--secondary); }

/* Responsive */
@media screen and (max-width: 1024px) {
    .article-layout { flex-direction: column; }
    .article-sidebar { flex: 1; position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .sidebar-card { margin-bottom: 0; }
    .sidebar-card:last-child { grid-column: 1 / -1; }
}
@media screen and (max-width: 768px) {
    .header-inner { height: 68px; }
    .nav-menu { position: fixed; top: 68px; left: 0; right: 0; background: var(--white); flex-direction: column; align-items: stretch; padding: 16px 24px; gap: 4px; box-shadow: 0 16px 40px rgba(11,29,58,0.12); border-bottom: 1px solid var(--border); transform: translateY(-120%); opacity: 0; visibility: hidden; transition: var(--transition); border-radius: 0 0 var(--radius) var(--radius); margin-left: 12px; margin-right: 12px; }
    .nav-menu.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-link { display: block; padding: 14px 18px; font-size: 16px; }
    .nav-link::after { display: none; }
    .nav-cta { display: none; }
    .nav-toggle { display: flex; }
    .article-hero { padding: 70px 0 56px; }
    .article-main { padding: 28px 22px; }
    .article-meta { gap: 14px; font-size: 13px; }
    .article-section { padding: 48px 0; }
    .related-section { padding: 52px 0; }
    .section-head h2 { font-size: 1.7rem; }
    .footer-top { flex-direction: column; gap: 28px; }
    .article-sidebar { grid-template-columns: 1fr; }
}
@media screen and (max-width: 520px) {
    .container { padding: 0 18px; }
    .header-inner { height: 62px; }
    .nav-logo { font-size: 18px; }
    .logo-mark { width: 34px; height: 34px; font-size: 17px; border-radius: 10px; }
    .article-hero { padding: 48px 0 42px; }
    .breadcrumb { font-size: 12px; margin-bottom: 18px; }
    .article-hero h1 { font-size: 1.5rem; margin-bottom: 16px; }
    .article-meta { gap: 10px; font-size: 12px; }
    .article-main { padding: 22px 16px; }
    .article-content { font-size: 0.96rem; }
    .article-content h2 { font-size: 1.3rem; }
    .article-content h3 { font-size: 1.12rem; }
    .btn { padding: 10px 20px; font-size: 14px; }
    .cta-section h2 { font-size: 1.7rem; }
    .cta-actions { flex-direction: column; align-items: center; }
    .cta-actions .btn { width: 100%; }
    .faq-item summary { font-size: 15px; padding: 16px 18px; }
    .faq-answer { padding: 0 18px 18px; }
    .footer-bottom { justify-content: center; text-align: center; }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #2467f6;
            --primary-dark: #174ac4;
            --primary-light: #e8f0ff;
            --accent: #7c5cff;
            --dark-bg: #0c1524;
            --dark-bg-2: #111d35;
            --card-bg: #ffffff;
            --body-bg: #f6f8fc;
            --text-main: #1c2735;
            --text-muted: #64748b;
            --text-light: #8b9bb4;
            --border: #e4eaf2;
            --radius-sm: 10px;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 4px 14px rgba(20, 45, 90, 0.06);
            --shadow: 0 12px 32px rgba(20, 45, 90, 0.09);
            --shadow-lg: 0 24px 56px rgba(20, 45, 90, 0.14);
            --transition: all .25s ease;
            --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
        }

        /* ========== 基础 Reset ========== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--body-bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        h1, h2, h3, h4, h5 {
            line-height: 1.3;
            color: var(--text-main);
            font-weight: 700;
        }
        ul, ol {
            list-style: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input, select, textarea {
            font-family: inherit;
        }
        :focus-visible {
            outline: 3px solid rgba(36, 103, 246, 0.35);
            outline-offset: 2px;
        }

        /* ========== 容器 ========== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== 通用组件 ========== */
        .section-block {
            padding: 96px 0;
        }
        .section-alt {
            background: #ffffff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-head {
            max-width: 760px;
            margin: 0 auto 56px;
            text-align: center;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 1px;
            padding: 7px 16px;
            border-radius: 999px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .section-tag i {
            font-size: 14px;
        }
        .section-title {
            font-size: clamp(28px, 3.4vw, 40px);
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .section-sub {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.8;
        }
        .section-text {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .align-middle {
            align-items: center;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.5;
            border: 1px solid transparent;
            transition: var(--transition);
            text-align: center;
        }
        .btn-lg {
            padding: 15px 30px;
            font-size: 16px;
            border-radius: 14px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            box-shadow: 0 10px 24px rgba(36, 103, 246, 0.28);
        }
        .btn-primary:hover {
            color: #ffffff;
            transform: translateY(-3px);
            box-shadow: 0 14px 32px rgba(36, 103, 246, 0.38);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.35);
            color: #ffffff;
            backdrop-filter: blur(6px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: #ffffff;
            color: #ffffff;
            transform: translateY(-3px);
        }
        .btn-white {
            background: #ffffff;
            color: var(--primary-dark);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
        }
        .btn-white:hover {
            color: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 14px 30px rgba(28, 39, 53, 0.2);
        }
        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.45);
            color: #ffffff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
            color: #ffffff;
            transform: translateY(-3px);
        }

        /* ========== 顶部导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(228, 234, 242, 0.85);
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            gap: 16px;
        }
        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--text-main);
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            font-weight: 700;
            font-size: 18px;
            box-shadow: 0 6px 16px rgba(36, 103, 246, 0.3);
            flex-shrink: 0;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
        }
        .nav-item {
            margin: 0;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 9px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            position: relative;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 3px;
            left: 50%;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--primary);
            transform: translateX(-50%);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            padding: 9px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 8px 20px rgba(36, 103, 246, 0.28);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 12px 26px rgba(36, 103, 246, 0.38);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            border-color: var(--primary);
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle.is-active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.is-active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.is-active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Hero 区域 ========== */
        .category-hero {
            position: relative;
            padding: 170px 0 90px;
            background:
                linear-gradient(140deg, rgba(8, 17, 33, 0.93) 0%, rgba(18, 34, 66, 0.82) 45%, rgba(36, 103, 246, 0.68) 100%),
                url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #ffffff;
            text-align: center;
            overflow: hidden;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            color: #ffffff;
            margin-bottom: 24px;
        }
        .category-hero h1 {
            color: #ffffff;
            font-size: clamp(34px, 6vw, 56px);
            max-width: 720px;
            margin: 0 auto 18px;
            letter-spacing: -0.03em;
            line-height: 1.2;
        }
        .hero-lead {
            max-width: 680px;
            margin: 0 auto 36px;
            color: rgba(255, 255, 255, 0.78);
            font-size: 17px;
            line-height: 1.9;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            justify-content: center;
            margin-top: 34px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }
        .hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.72);
        }
        .hero-breadcrumb a:hover {
            color: #ffffff;
        }
        .bc-sep {
            color: rgba(255, 255, 255, 0.35);
        }

        /* ========== 平台概况 ========== */
        .about-block .cell {
            margin-bottom: 32px;
        }
        .about-list {
            margin: 24px 0 0;
        }
        .about-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-muted);
            padding: 8px 0;
        }
        .about-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .about-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-top: 28px;
        }
        .about-stats > div {
            background: var(--body-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 14px 12px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .about-stats i {
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .about-stats strong {
            font-size: 16px;
            color: var(--text-main);
        }
        .about-figure {
            position: relative;
            margin: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .about-figure img {
            width: 100%;
            height: 520px;
            object-fit: cover;
        }
        .figure-note {
            position: absolute;
            left: 20px;
            bottom: 20px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            padding: 10px 18px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            box-shadow: var(--shadow);
        }
        .figure-note i {
            color: var(--primary);
            font-size: 18px;
        }

        /* ========== 快速上手 ========== */
        .quickstart-block {
            background: #ffffff;
        }
        .step-item {
            position: relative;
            background: var(--body-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 26px;
            height: 100%;
            transition: var(--transition);
        }
        .step-item:hover {
            background: #ffffff;
            border-color: rgba(36, 103, 246, 0.3);
            box-shadow: var(--shadow);
            transform: translateY(-5px);
        }
        .step-num {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
            box-shadow: 0 8px 18px rgba(36, 103, 246, 0.24);
        }
        .step-item h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .step-item p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
        }

        /* ========== 核心功能 ========== */
        .feature-card {
            position: relative;
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 26px;
            height: 100%;
            overflow: hidden;
            transition: var(--transition);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-6px);
            border-color: rgba(36, 103, 246, 0.25);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
        }
        .feature-tag {
            display: inline-block;
            margin-top: 16px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }

        /* ========== 平台动态 深色区域 ========== */
        .news-dark {
            background: radial-gradient(1100px 520px at 25% 10%, #1a2c4d 0%, #0c1524 70%);
            color: rgba(255, 255, 255, 0.85);
        }
        .news-dark .section-title {
            color: #ffffff;
        }
        .news-dark .section-sub {
            color: rgba(255, 255, 255, 0.6);
        }
        .news-dark .section-tag {
            background: rgba(36, 103, 246, 0.22);
            color: #bcd4ff;
        }
        .news-card {
            background: #ffffff;
            border-radius: var(--radius);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.18);
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 18px 38px rgba(0, 0, 0, 0.28);
        }
        .news-card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            position: relative;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.05);
        }
        .news-card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.45;
            transition: var(--transition);
        }
        .news-title:hover {
            color: var(--primary);
        }
        .news-card-body p {
            flex: 1;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin: 0 0 16px;
        }
        .text-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }
        .text-btn:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ========== 进阶技巧 ========== */
        .tips-block {
            background: linear-gradient(180deg, #f6f8fc 0%, #ecf2fb 100%);
        }
        .tips-figure {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .tips-figure img {
            width: 100%;
            height: 500px;
            object-fit: cover;
        }
        .tips-figure .figure-badge {
            position: absolute;
            top: 18px;
            right: 18px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(6px);
            color: var(--primary-dark);
            border-radius: 999px;
            padding: 8px 14px;
            font-size: 13px;
            font-weight: 600;
        }
        .tip-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .tip-row {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: rgba(255, 255, 255, 0.82);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 18px 20px;
            transition: var(--transition);
        }
        .tip-row:hover {
            background: #ffffff;
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
            border-color: rgba(36, 103, 246, 0.22);
        }
        .tip-icon {
            width: 42px;
            height: 42px;
            border-radius: 11px;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .tip-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .tip-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ========== FAQQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item[open] {
            border-color: rgba(36, 103, 246, 0.35);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            cursor: pointer;
            list-style: none;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--primary);
            font-size: 14px;
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 22px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-answer p {
            margin: 0;
        }
        .faq-more {
            text-align: center;
            margin-top: 32px;
            color: var(--text-muted);
            font-size: 15px;
        }
        .faq-more a {
            font-weight: 600;
        }
        .faq-more a:hover {
            color: var(--primary-dark);
        }

        /* ========== CTA 区域 ========== */
        .cta-section {
            padding: 80px 0 100px;
        }
        .cta-band {
            position: relative;
            background:
                linear-gradient(135deg, rgba(12, 21, 36, 0.88), rgba(36, 103, 246, 0.7)),
                url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            color: #ffffff;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.24);
            border-radius: 999px;
            padding: 7px 16px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 18px;
        }
        .cta-band h2 {
            color: #ffffff;
            font-size: clamp(26px, 3.6vw, 40px);
            margin-bottom: 12px;
        }
        .cta-band p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 16px;
            max-width: 540px;
            margin: 0 auto 28px;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* ========== 页面底部 ========== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.72);
            padding-top: 64px;
        }
        .site-footer .nav-logo {
            color: #ffffff;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand-text {
            color: rgba(255, 255, 255, 0.55);
            font-size: 15px;
            line-height: 1.9;
            margin-top: 16px;
            max-width: 380px;
        }
        .footer-links h4 {
            color: #ffffff;
            font-size: 16px;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-links ul {
            display: grid;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.58);
            font-size: 15px;
        }
        .footer-links a:hover {
            color: #ffffff;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            padding: 24px 0 28px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: inherit;
        }
        .footer-bottom a:hover {
            color: #ffffff;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                align-items: stretch;
                padding: 18px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 18px 36px rgba(20, 45, 90, 0.12);
                gap: 6px;
                max-height: calc(100vh - 72px);
                overflow-y: auto;
                z-index: 999;
            }
            .nav-menu.nav-open {
                display: flex;
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-link.active::after {
                bottom: 12px;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .category-hero {
                padding: 140px 0 72px;
            }
            .section-block {
                padding: 80px 0;
            }
            .grid-padding-x > .cell {
                margin-bottom: 28px;
            }
            .about-figure img {
                height: 440px;
            }
            .tips-figure img {
                height: 420px;
            }
        }

        @media (max-width: 768px) {
            .hero-lead {
                font-size: 15px;
            }
            .category-hero h1 {
                font-size: 34px;
            }
            .section-head {
                margin-bottom: 40px;
            }
            .section-block {
                padding: 64px 0;
            }
            .about-figure img {
                height: 360px;
            }
            .about-stats {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 8px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .cta-band {
                padding: 48px 26px;
            }
            .tips-figure img {
                height: 320px;
            }
            .tip-row {
                padding: 16px;
            }
            .faq-item summary {
                padding: 17px 20px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 20px 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .category-hero {
                padding: 118px 0 56px;
            }
            .section-block {
                padding: 56px 0;
            }
            .section-title {
                font-size: 27px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 320px;
            }
            .about-stats {
                grid-template-columns: 1fr;
            }
            .about-figure img {
                height: 260px;
            }
            .tips-figure img {
                height: 240px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .cta-band {
                padding: 40px 20px;
            }
            .footer-top {
                gap: 28px;
            }
            .footer-brand-text {
                font-size: 14px;
            }
        }