/* roulang page: index */
/* ===== Design Tokens ===== */
:root {
    --bg-primary: #0B1020;
    --bg-secondary: #0E1530;
    --bg-tertiary: #111A30;
    --bg-deep: #070B14;
    --bg-card: rgba(255,255,255,0.06);
    --bg-card-hover: rgba(255,255,255,0.09);
    --primary: #2E6BE6;
    --primary-hover: #3F7DF0;
    --accent: #00E0B8;
    --amber: #FFC857;
    --text-light: #EAF0FF;
    --text-body: #9AA7C7;
    --text-weak: #5C6A8A;
    --border-light: rgba(255,255,255,0.10);
    --border-hover: rgba(255,255,255,0.20);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --shadow-glow: 0 0 24px rgba(46,107,230,0.5);
    --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
    --shadow-hover: 0 16px 48px rgba(0,0,0,0.45);
    --transition: 0.25s ease;
    --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
    --font-en: "Inter", "Roboto", "Helvetica Neue", sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    font-family: var(--font-main);
    background:var(--bg-primary);
    color:var(--text-body);
    line-height:1.75;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
}
img { max-width:100%; height:auto; display:block; }
a { color:var(--text-light); text-decoration:none; transition:color var(--transition); }
a:hover { color:var(--accent); }
ul,ol { list-style:none; }
button { font-family:inherit; cursor:pointer; border:none; background:none; }
:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }

/* ===== Container ===== */
.container {
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 24px;
}
.container-narrow { max-width:880px; }

/* ===== Buttons ===== */
.btn {
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 28px;
    border-radius:var(--radius-sm);
    font-size:15px;
    font-weight:600;
    line-height:1.2;
    border:1px solid transparent;
    transition:all var(--transition);
    white-space:nowrap;
}
.btn-primary {
    background:var(--primary);
    color:#fff;
}
.btn-primary:hover {
    background:var(--primary-hover);
    color:#fff;
    transform:translateY(-2px);
    box-shadow:var(--shadow-glow);
}
.btn-primary:active { transform:translateY(0); box-shadow:0 0 12px rgba(46,107,230,0.4); }
.btn-glow { box-shadow:0 0 24px rgba(46,107,230,0.5); }
.btn-glow:hover { box-shadow:0 0 36px rgba(46,107,230,0.65); }
.btn-outline {
    background:transparent;
    border-color:var(--primary);
    color:var(--text-light);
}
.btn-outline:hover {
    background:rgba(46,107,230,0.10);
    border-color:var(--primary-hover);
    color:#fff;
    transform:translateY(-2px);
}
.btn-outline:active { transform:translateY(0); }
.btn-large { padding:16px 38px; font-size:16px; }
.btn-block { width:100%; }

/* ===== Header / Nav ===== */
.site-header {
    position:fixed;
    top:0;
    left:0;
    right:0;
    z-index:1000;
    height:72px;
    background:rgba(11,16,32,0.82);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(255,255,255,0.06);
    transition:background var(--transition);
}
.header-inner {
    display:flex;
    align-items:center;
    justify-content:space-between;
    height:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 24px;
}
.brand-logo {
    display:flex;
    align-items:center;
    gap:12px;
    font-size:20px;
    font-weight:700;
    color:var(--text-light);
    letter-spacing:0;
    line-height:1.2;
    min-height:44px;
}
.brand-logo:hover { color:var(--text-light); }
.brand-icon {
    display:flex;
    align-items:center;
    justify-content:center;
    width:36px;
    height:36px;
    border-radius:10px;
    background:linear-gradient(135deg, var(--primary), var(--accent));
    flex-shrink:0;
    box-shadow:0 0 12px rgba(46,107,230,0.35);
}
.brand-icon svg { width:20px; height:20px; fill:#fff; }
.brand-text { font-weight:700; }

.main-nav {
    display:flex;
    align-items:center;
    gap:8px;
}
.nav-link {
    position:relative;
    display:inline-flex;
    align-items:center;
    padding:10px 16px;
    font-size:15px;
    font-weight:500;
    color:var(--text-body);
    border-radius:6px;
    transition:color var(--transition);
    min-height:44px;
}
.nav-link::after {
    content:"";
    position:absolute;
    left:50%;
    bottom:2px;
    width:0;
    height:2px;
    background:linear-gradient(90deg, var(--primary), var(--accent));
    border-radius:2px;
    transform:translateX(-50%);
    transition:width 0.25s ease;
}
.nav-link:hover { color:#fff; }
.nav-link:hover::after { width:60%; }
.nav-link.active {
    color:#fff;
}
.nav-link.active::after {
    width:70%;
}
.nav-cta {
    margin-left:14px;
    padding:10px 20px;
    font-size:14px;
}
.hamburger {
    display:none;
    flex-direction:column;
    justify-content:center;
    gap:5px;
    width:44px;
    height:44px;
    padding:10px;
    border-radius:8px;
    background:rgba(255,255,255,0.06);
}
.hamburger span {
    display:block;
    width:22px;
    height:2px;
    background:#fff;
    border-radius:2px;
    transition:transform 0.3s ease, opacity 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform:translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity:0; }
.hamburger.open span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.mobile-drawer {
    display:none;
    position:fixed;
    top:72px;
    left:0;
    right:0;
    bottom:0;
    z-index:999;
    background:rgba(11,16,32,0.96);
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    padding:32px 24px;
    flex-direction:column;
    gap:8px;
    overflow-y:auto;
}
.mobile-drawer.open { display:flex; }
.mobile-drawer .nav-link {
    font-size:20px;
    padding:14px 12px;
    border-bottom:1px solid rgba(255,255,255,0.06);
    color:var(--text-body);
}
.mobile-drawer .nav-link.active { color:#fff; }
.mobile-drawer .nav-link::after { display:none; }
.mobile-drawer .nav-cta {
    margin:20px 0 0;
    justify-content:center;
    font-size:16px;
    padding:14px 28px;
}

/* ===== Hero ===== */
.hero {
    position:relative;
    min-height:100vh;
    display:flex;
    align-items:center;
    padding:140px 0 80px;
    overflow:hidden;
}
.hero-bg {
    position:absolute;
    top:0; left:0; right:0; bottom:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;
    background-position:center;
    transform:scale(1.05);
    z-index:0;
}
.hero-overlay {
    position:absolute;
    top:0; left:0; right:0; bottom:0;
    z-index:1;
    background:
        linear-gradient(90deg, rgba(11,16,32,0.94) 0%, rgba(11,16,32,0.82) 45%, rgba(11,16,32,0.45) 100%),
        linear-gradient(180deg, rgba(11,16,32,0.7) 0%, transparent 30%, rgba(11,16,32,0.6) 100%);
}
.hero-content {
    position:relative;
    z-index:2;
}
.hero-badge {
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:6px 16px;
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    letter-spacing:0.12em;
    text-transform:uppercase;
    color:var(--accent);
    background:rgba(0,224,184,0.10);
    border:1px solid rgba(0,224,184,0.30);
    margin-bottom:24px;
}
.hero-title {
    font-size:44px;
    font-weight:700;
    color:var(--text-light);
    line-height:1.25;
    letter-spacing:-0.02em;
    margin-bottom:20px;
    max-width:640px;
}
.hero-subtitle {
    font-size:17px;
    color:var(--text-body);
    line-height:1.8;
    max-width:560px;
    margin-bottom:36px;
}
.hero-actions {
    display:flex;
    flex-wrap:wrap;
    gap:16px;
    margin-bottom:56px;
}
.hero-stats { width:100%; max-width:760px; }
.stat-card {
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-md);
    padding:20px 18px;
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    position:relative;
    overflow:hidden;
    text-align:left;
    transition:all var(--transition);
    box-shadow:var(--shadow-card);
}
.stat-card::before {
    content:"";
    position:absolute;
    top:0; left:0; right:0;
    height:1px;
    background:linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
}
.stat-card:hover {
    transform:translateY(-4px);
    border-color:var(--border-hover);
    box-shadow:var(--shadow-hover);
}
.stat-num {
    font-size:30px;
    font-weight:700;
    font-family:var(--font-en);
    color:var(--text-light);
    line-height:1.2;
    margin-bottom:4px;
}
.stat-num span { color:var(--accent); font-size:22px; }
.stat-label { font-size:13px; color:var(--text-weak); }

/* ===== Section common ===== */
.section { padding:96px 0; }
.section-alt { background:var(--bg-secondary); }
.section-deep { background:var(--bg-tertiary); }
.section-head { margin-bottom:48px; }
.section-eyebrow {
    display:block;
    font-size:13px;
    font-weight:600;
    letter-spacing:0.16em;
    text-transform:uppercase;
    color:var(--accent);
    margin-bottom:10px;
}
.section-title {
    font-size:32px;
    font-weight:600;
    color:var(--text-light);
    line-height:1.3;
    margin-bottom:14px;
    letter-spacing:-0.01em;
}
.section-desc {
    font-size:15px;
    color:var(--text-body);
    max-width:720px;
    line-height:1.8;
}
.text-center { text-align:center; }
.text-center .section-desc { margin-left:auto; margin-right:auto; }

/* ===== Trust Bar ===== */
.trust-bar {
    background:var(--bg-secondary);
    border-top:1px solid rgba(255,255,255,0.04);
    border-bottom:1px solid rgba(255,255,255,0.04);
    padding:36px 0;
}
.trust-inner {
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:center;
    gap:24px;
}
.trust-item {
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:10px 22px;
    border-radius:999px;
    background:rgba(255,255,255,0.05);
    border:1px solid var(--border-light);
    font-size:14px;
    font-weight:500;
    color:var(--text-body);
    backdrop-filter:blur(8px);
    transition:all var(--transition);
}
.trust-item i { color:var(--accent); font-size:15px; }
.trust-item:hover { border-color:rgba(0,224,184,0.4); color:var(--text-light); }

/* ===== Services (2+1) ===== */
.services-grid {
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:24px;
}
.service-card-lg {
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-lg);
    padding:36px;
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    position:relative;
    overflow:hidden;
    transition:all var(--transition);
    box-shadow:var(--shadow-card);
}
.service-card-lg::before {
    content:"";
    position:absolute;
    top:0; left:0; bottom:0;
    width:40%;
    background:linear-gradient(135deg, rgba(255,255,255,0.08), transparent);
    transform:skewX(-15deg) translateX(-60%);
    opacity:0.3;
    transition:opacity var(--transition);
}
.service-card-lg:hover::before { opacity:0.6; }
.service-card-lg:hover {
    transform:translateY(-4px);
    border-color:var(--border-hover);
    box-shadow:var(--shadow-hover);
}
.service-icon {
    width:52px;
    height:52px;
    border-radius:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:22px;
    color:#fff;
    background:linear-gradient(135deg, var(--primary), #1B3F8F);
    margin-bottom:20px;
    box-shadow:0 4px 16px rgba(46,107,230,0.3);
}
.service-card-lg .icon-accent {
    background:linear-gradient(135deg, #008C72, #00E0B8);
    box-shadow:0 4px 16px rgba(0,224,184,0.25);
}
.service-card-lg h3 {
    font-size:20px;
    font-weight:600;
    color:var(--text-light);
    margin-bottom:12px;
}
.service-card-lg p {
    font-size:15px;
    color:var(--text-body);
    line-height:1.75;
    margin-bottom:20px;
}
.service-link {
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    font-weight:600;
    color:var(--accent);
    transition:gap var(--transition);
}
.service-link i { transition:transform var(--transition); }
.service-link:hover i { transform:translateX(4px); }
.service-wide {
    grid-column:1 / -1;
    display:flex;
    align-items:center;
    gap:40px;
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-lg);
    padding:0;
    overflow:hidden;
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    box-shadow:var(--shadow-card);
    transition:all var(--transition);
}
.service-wide:hover {
    transform:translateY(-4px);
    border-color:var(--border-hover);
    box-shadow:var(--shadow-hover);
}
.service-wide-media {
    flex:0 0 360px;
    min-height:220px;
    background-image:url('/assets/images/coverpic/cover-1.png');
    background-size:cover;
    background-position:center;
    position:relative;
}
.service-wide-media::after {
    content:"";
    position:absolute;
    top:0; right:0; bottom:0;
    width:60px;
    background:linear-gradient(90deg, transparent, var(--bg-primary));
}
.service-wide-body { flex:1; padding:32px 32px 32px 0; }
.service-wide-body h3 {
    font-size:20px;
    font-weight:600;
    color:var(--text-light);
    margin-bottom:12px;
}
.service-wide-body p { font-size:15px; color:var(--text-body); line-height:1.75; margin-bottom:20px; }

/* ===== Scenario timeline ===== */
.scenario-timeline {
    display:grid;
    grid-template-columns:repeat(4, 1fr);
    gap:24px;
    position:relative;
}
.scenario-timeline::before {
    content:"";
    position:absolute;
    top:32px;
    left:8%;
    right:8%;
    height:2px;
    background:linear-gradient(90deg, rgba(46,107,230,0.6), rgba(0,224,184,0.6));
    z-index:0;
}
.scenario-node {
    position:relative;
    z-index:1;
    text-align:center;
    padding:24px 16px;
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-md);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    transition:all var(--transition);
}
.scenario-node:hover {
    transform:translateY(-4px);
    border-color:rgba(0,224,184,0.35);
    box-shadow:var(--shadow-hover);
}
.scenario-num {
    width:64px;
    height:64px;
    margin:0 auto 16px;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:20px;
    font-weight:700;
    font-family:var(--font-en);
    color:#fff;
    background:linear-gradient(135deg, var(--primary), #1B3F8F);
    box-shadow:0 0 0 4px rgba(11,16,32,0.9), 0 0 20px rgba(46,107,230,0.4);
}
.scenario-node:nth-child(2) .scenario-num { background:linear-gradient(135deg, #0E7EB8, #00A3D9); }
.scenario-node:nth-child(3) .scenario-num { background:linear-gradient(135deg, #008C72, #00E0B8); }
.scenario-node:nth-child(4) .scenario-num { background:linear-gradient(135deg, #B8860B, #FFC857); }
.scenario-node h3 { font-size:17px; font-weight:600; color:var(--text-light); margin-bottom:8px; }
.scenario-node p { font-size:14px; color:var(--text-body); line-height:1.7; }

/* ===== Case Study ===== */
.case-wrap {
    display:flex;
    align-items:center;
    gap:48px;
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-lg);
    padding:40px;
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    box-shadow:var(--shadow-card);
    transition:all var(--transition);
}
.case-wrap:hover {
    border-color:var(--border-hover);
    box-shadow:var(--shadow-hover);
}
.case-media {
    flex:0 0 48%;
    border-radius:var(--radius-md);
    overflow:hidden;
    position:relative;
    min-height:300px;
    background-image:url('/assets/images/coverpic/cover-2.webp');
    background-size:cover;
    background-position:center;
}
.case-media::after {
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg, transparent 50%, rgba(11,16,32,0.7));
}
.case-body { flex:1; }
.case-body .section-eyebrow { margin-bottom:8px; }
.case-body h3 {
    font-size:24px;
    font-weight:600;
    color:var(--text-light);
    margin-bottom:16px;
    line-height:1.4;
}
.case-body p { font-size:15px; color:var(--text-body); line-height:1.8; margin-bottom:24px; }
.case-results {
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:16px;
    margin-bottom:28px;
}
.result-item {
    background:rgba(255,255,255,0.04);
    border:1px solid var(--border-light);
    border-radius:var(--radius-sm);
    padding:14px 12px;
    text-align:center;
}
.result-num { font-size:24px; font-weight:700; color:var(--amber); font-family:var(--font-en); }
.result-label { font-size:12px; color:var(--text-weak); margin-top:2px; }

/* ===== Pricing ===== */
.pricing-grid {
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:24px;
    align-items:center;
}
.pricing-card {
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-lg);
    padding:32px 28px;
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    position:relative;
    transition:all var(--transition);
    box-shadow:var(--shadow-card);
}
.pricing-card:hover { transform:translateY(-4px); border-color:var(--border-hover); box-shadow:var(--shadow-hover); }
.pricing-card.featured {
    background:rgba(46,107,230,0.10);
    border-color:rgba(46,107,230,0.5);
    box-shadow:0 0 32px rgba(46,107,230,0.25);
    padding:40px 32px;
    transform:scale(1.03);
}
.pricing-card.featured:hover { transform:scale(1.03) translateY(-4px); box-shadow:0 0 44px rgba(46,107,230,0.35); }
.pricing-badge {
    position:absolute;
    top:24px;
    right:-8px;
    background:var(--amber);
    color:#0B1020;
    font-size:12px;
    font-weight:700;
    padding:4px 14px;
    border-radius:4px;
    box-shadow:0 2px 8px rgba(255,200,87,0.4);
}
.pricing-name { font-size:18px; font-weight:600; color:var(--text-light); margin-bottom:8px; }
.pricing-desc { font-size:14px; color:var(--text-weak); margin-bottom:24px; }
.pricing-price { font-size:32px; font-weight:700; color:var(--text-light); font-family:var(--font-en); margin-bottom:8px; }
.pricing-price span { font-size:14px; font-weight:400; color:var(--text-weak); }
.pricing-featured .pricing-price { color:var(--amber); }
.pricing-list { margin:24px 0 28px; }
.pricing-list li {
    display:flex;
    align-items:flex-start;
    gap:10px;
    font-size:14px;
    color:var(--text-body);
    margin-bottom:12px;
    line-height:1.6;
}
.pricing-list i { color:var(--accent); margin-top:3px; font-size:14px; }

/* ===== News Section ===== */
.news-grid {
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:24px;
}
.news-card {
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-md);
    padding:24px;
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    display:flex;
    flex-direction:column;
    gap:12px;
    transition:all var(--transition);
    box-shadow:var(--shadow-card);
}
.news-card:hover {
    transform:translateY(-4px);
    border-color:var(--border-hover);
    box-shadow:var(--shadow-hover);
}
.news-card-top {
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
    flex-wrap:wrap;
}
.news-tag {
    display:inline-block;
    padding:3px 10px;
    border-radius:999px;
    font-size:12px;
    font-weight:600;
    color:var(--accent);
    background:rgba(0,224,184,0.10);
    border:1px solid rgba(0,224,184,0.25);
}
.news-date {
    font-size:12px;
    color:var(--text-weak);
    display:inline-flex;
    align-items:center;
    gap:5px;
}
.news-title {
    font-size:17px;
    font-weight:600;
    color:var(--text-light);
    line-height:1.5;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
    min-height:54px;
}
.news-title a { color:var(--text-light); }
.news-title a:hover { color:var(--accent); }
.news-summary {
    font-size:14px;
    color:var(--text-body);
    line-height:1.7;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
    min-height:48px;
}
.news-link {
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    font-weight:600;
    color:var(--accent);
    margin-top:auto;
}
.news-link i { transition:transform var(--transition); }
.news-link:hover i { transform:translateX(4px); }
.empty-tip {
    grid-column:1 / -1;
    text-align:center;
    padding:48px 24px;
    font-size:15px;
    color:var(--text-weak);
    background:var(--bg-card);
    border:1px dashed var(--border-light);
    border-radius:var(--radius-md);
}

/* ===== FAQ ===== */
.faq-list { max-width:820px; margin:0 auto; }
.faq-item {
    background:var(--bg-card);
    border:1px solid var(--border-light);
    border-radius:var(--radius-md);
    margin-bottom:14px;
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    transition:all var(--transition);
    overflow:hidden;
}
.faq-item:hover { border-color:var(--border-hover); }
.faq-item.open {
    border-color:rgba(0,224,184,0.35);
    background:rgba(255,255,255,0.08);
    box-shadow:0 8px 24px rgba(0,0,0,0.25);
}
.faq-question {
    position:relative;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:20px 24px 20px 24px;
    font-size:16px;
    font-weight:600;
    color:var(--text-light);
    cursor:pointer;
    min-height:56px;
    text-align:left;
}
.faq-item.open .faq-question { color:#fff; }
.faq-item.open .faq-question::before {
    content:"";
    position:absolute;
    left:0;
    top:12px;
    bottom:12px;
    width:3px;
    border-radius:3px;
    background:var(--accent);
}
.faq-icon {
    flex-shrink:0;
    width:32px;
    height:32px;
    border-radius:8px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:rgba(255,255,255,0.08);
    border:1px solid var(--border-light);
    font-size:14px;
    color:var(--text-body);
    transition:all var(--transition);
}
.faq-item.open .faq-icon {
    background:rgba(0,224,184,0.15);
    border-color:rgba(0,224,184,0.4);
    color:var(--accent);
}
.faq-answer {
    display:none;
    padding:0 24px 22px;
    font-size:15px;
    color:var(--text-body);
    line-height:1.75;
}
.faq-item.open .faq-answer { display:block; }

/* ===== CTA Band ===== */
.cta-band {
    background:var(--bg-deep);
    border-top:1px solid rgba(255,255,255,0.06);
    padding:96px 0;
    position:relative;
    overflow:hidden;
}
.cta-band::before {
    content:"";
    position:absolute;
    top:0; left:0; right:0; bottom:0;
    background-image:url('/assets/images/backpic/back-3.webp');
    background-size:cover;
    background-position:center;
    opacity:0.15;
}
.cta-band-content { position:relative; z-index:1; text-align:center; }
.cta-band h2 {
    font-size:32px;
    font-weight:600;
    color:var(--text-light);
    margin-bottom:16px;
    letter-spacing:-0.01em;
}
.cta-band p {
    font-size:15px;
    color:var(--text-body);
    max-width:600px;
    margin:0 auto 32px;
    line-height:1.8;
}
.cta-note {
    display:block;
    margin-top:16px;
    font-size:13px;
    color:var(--text-weak);
}

/* ===== Footer ===== */
.site-footer {
    background:var(--bg-deep);
    border-top:1px solid rgba(255,255,255,0.06);
    padding:64px 0 0;
}
.footer-grid {
    display:grid;
    grid-template-columns:2fr 1fr 1.4fr;
    gap:48px;
    padding-bottom:48px;
}
.footer-brand .brand-logo { margin-bottom:16px; }
.footer-brand p {
    font-size:14px;
    color:var(--text-weak);
    line-height:1.8;
    max-width:280px;
}
.footer-title {
    font-size:15px;
    font-weight:600;
    color:var(--text-light);
    margin-bottom:20px;
}
.footer-links li { margin-bottom:10px; }
.footer-links a { font-size:14px; color:var(--text-weak); transition:color var(--transition); }
.footer-links a:hover { color:#fff; }
.footer-contact li {
    display:flex;
    align-items:center;
    gap:10px;
    font-size:14px;
    color:var(--text-weak);
    margin-bottom:12px;
}
.footer-contact i { color:var(--accent); width:16px; text-align:center; }
.footer-bottom {
    border-top:1px solid rgba(255,255,255,0.06);
    padding:24px 0;
    text-align:center;
    font-size:13px;
    color:var(--text-weak);
}
.footer-bottom a { color:var(--text-weak); }
.footer-bottom a:hover { color:#fff; }

/* ===== Responsive ===== */
@media (max-width:1024px) {
    .hero-title { font-size:36px; }
    .services-grid { grid-template-columns:1fr 1fr; }
    .service-wide { flex-direction:column; }
    .service-wide-media { width:100%; flex:0 0 200px; }
    .service-wide-body { padding:24px; }
    .scenario-timeline { grid-template-columns:repeat(2, 1fr); }
    .scenario-timeline::before { display:none; }
    .case-wrap { flex-direction:column; }
    .case-media { flex:0 0 260px; width:100%; }
    .pricing-grid { grid-template-columns:1fr 1fr; }
    .pricing-card.featured { order:-1; grid-column:1 / -1; }
    .news-grid { grid-template-columns:repeat(2, 1fr); }
    .footer-grid { grid-template-columns:1fr 1fr; }
}
@media (max-width:768px) {
    .section { padding:64px 0; }
    .hero { padding:120px 0 64px; }
    .hero-title { font-size:30px; }
    .hero-subtitle { font-size:16px; }
    .hero-actions { margin-bottom:40px; }
    .main-nav { display:none; }
    .hamburger { display:flex; }
    .section-title { font-size:26px; }
    .services-grid { grid-template-columns:1fr; }
    .scenario-timeline { grid-template-columns:1fr; gap:16px; }
    .case-results { grid-template-columns:1fr; }
    .pricing-grid { grid-template-columns:1fr; }
    .pricing-card.featured { order:0; grid-column:auto; transform:none; }
    .pricing-card.featured:hover { transform:translateY(-4px); }
    .news-grid { grid-template-columns:1fr; }
    .footer-grid { grid-template-columns:1fr; gap:32px; }
    .cta-band { padding:64px 0; }
    .cta-band h2 { font-size:26px; }
}
@media (max-width:520px) {
    .container { padding:0 16px; }
    .hero-title { font-size:26px; }
    .hero-subtitle { font-size:15px; }
    .hero-actions .btn { width:100%; }
    .stat-card { padding:14px; }
    .stat-num { font-size:24px; }
    .service-card-lg { padding:24px; }
    .case-wrap { padding:24px; }
    .pricing-card { padding:24px; }
    .faq-question { font-size:14px; }
    .btn-large { padding:14px 28px; }
}

/* roulang page: category1 */
:root {
            --bg-primary: #0B1020;
            --bg-secondary: #111A30;
            --bg-tertiary: #0E1530;
            --bg-dark: #070B14;
            --primary: #2E6BE6;
            --primary-hover: #3F7DF0;
            --accent: #00E0B8;
            --highlight: #FFC857;
            --text-main: #EAF0FF;
            --text-secondary: #9AA7C7;
            --text-muted: #5C6A8A;
            --border: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(255, 255, 255, 0.20);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-strong: rgba(15, 20, 38, 0.88);
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-glow: 0 0 24px rgba(46, 107, 230, 0.5);
            --shadow-glow-lg: 0 0 36px rgba(46, 107, 230, 0.65);
            --transition: 0.25s ease;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            z-index: 1000;
            background: rgba(11, 16, 32, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }

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

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            color: var(--accent);
        }

        .brand-icon svg {
            width: 26px;
            height: 26px;
            fill: currentColor;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .main-nav .nav-link {
            position: relative;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 2px;
            transition: color var(--transition);
        }

        .main-nav .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--accent), var(--primary));
            transition: width 0.25s ease;
        }

        .main-nav .nav-link:hover {
            color: #fff;
        }

        .main-nav .nav-link:hover::after {
            width: 100%;
        }

        .main-nav .nav-link.active {
            color: #fff;
        }

        .main-nav .nav-link.active::after {
            width: 100%;
        }

        .nav-cta {
            margin-left: 8px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            cursor: pointer;
            border: none;
            transition: all var(--transition);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--text-main);
            box-shadow: 0 0 12px rgba(46, 107, 230, 0.15);
        }

        .btn-outline:hover {
            background: rgba(46, 107, 230, 0.12);
            border-color: var(--primary-hover);
            box-shadow: 0 0 20px rgba(46, 107, 230, 0.3);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-glow-lg);
            transform: translateY(-2px);
        }

        .btn-glow {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-glow);
            font-size: 16px;
            padding: 16px 36px;
            border-radius: 10px;
        }

        .btn-glow:hover {
            background: var(--primary-hover);
            box-shadow: var(--shadow-glow-lg);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn:active {
            transform: translateY(1px) scale(0.99);
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .text-link:focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            width: 44px;
            height: 44px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* ========== Page Banner ========== */
        .page-banner {
            position: relative;
            min-height: 300px;
            display: flex;
            align-items: center;
            background-color: var(--bg-primary);
            overflow: hidden;
            margin-top: 72px;
        }

        .banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.5;
        }

        .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(11, 16, 32, 0.95) 25%, rgba(14, 21, 48, 0.7) 70%, rgba(11, 16, 32, 0.6) 100%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            padding: 56px 32px;
        }

        .banner-inner {
            max-width: 800px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(0, 224, 184, 0.12);
            border: 1px solid rgba(0, 224, 184, 0.3);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            margin-bottom: 18px;
        }

        .page-banner h1 {
            font-size: 40px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 14px;
        }

        .banner-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.8;
        }

        /* ========== Sections ========== */
        .section {
            padding: 80px 0;
        }

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

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

        .section-header {
            max-width: 700px;
            margin-bottom: 48px;
        }

        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.15em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-main);
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== Intro / Description ========== */
        .intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .intro-text h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.4;
        }

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

        .intro-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .stat-card {
            background: var(--glass-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }

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

        .stat-card .stat-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
        }

        .stat-card .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ========== Glass Cards ========== */
        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
            position: relative;
            overflow: hidden;
            transition: all var(--transition);
        }

        .glass-card::before {
            content: "";
            position: absolute;
            top: -40px;
            left: -40px;
            width: 100px;
            height: 100px;
            background: linear-gradient(135deg, rgba(0, 224, 184, 0.08), transparent);
            border-radius: 50%;
            pointer-events: none;
            transform: rotate(45deg);
            opacity: 0.6;
        }

        .glass-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-hover);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1);
        }

        .glass-card:active {
            transform: scale(0.98);
        }

        /* ========== News Card ========== */
        .news-grid {
            row-gap: 32px;
        }

        .news-card {
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .news-card:hover .card-thumb img {
            transform: scale(1.04);
        }

        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            color: var(--bg-primary);
            background: var(--accent);
            letter-spacing: 0.02em;
            box-shadow: 0 4px 12px rgba(0, 224, 184, 0.3);
            z-index: 2;
        }

        .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition);
            align-self: flex-start;
        }

        .text-link i {
            font-size: 12px;
            transition: transform var(--transition);
        }

        .text-link:hover {
            color: #fff;
        }

        .text-link:hover i {
            transform: translateX(4px);
        }

        /* ========== Recommendation ========== */
        .rec-card {
            display: flex;
            gap: 20px;
            padding: 20px;
            height: 100%;
        }

        .rec-img {
            width: 180px;
            min-width: 180px;
            border-radius: 10px;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .rec-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .rec-card:hover .rec-img img {
            transform: scale(1.05);
        }

        .rec-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .badge-outline {
            background: transparent;
            border: 1px solid rgba(0, 224, 184, 0.4);
            color: var(--accent);
            align-self: flex-start;
            margin-bottom: 10px;
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            padding: 4px 12px;
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .rec-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .rec-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ========== FAQ Accordion ========== */
        .custom-accordion {
            background: transparent;
            border: none;
            max-width: 860px;
            margin: 0 auto;
        }

        .custom-accordion .accordion-item {
            background: var(--glass-bg);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
            position: relative;
            transition: border-color var(--transition), background var(--transition);
        }

        .custom-accordion .accordion-item.is-active {
            border-color: rgba(0, 224, 184, 0.35) !important;
            background: rgba(255, 255, 255, 0.09);
        }

        .custom-accordion .accordion-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            border-radius: 3px 0 0 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity var(--transition);
            z-index: 2;
        }

        .custom-accordion .accordion-item.is-active::before {
            opacity: 1;
        }

        .custom-accordion .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            background: transparent !important;
            border: none !important;
            line-height: 1.4;
            transition: color var(--transition);
        }

        .custom-accordion .accordion-title:hover {
            color: #fff;
        }

        .custom-accordion .accordion-title::after {
            content: "+";
            font-size: 20px;
            font-weight: 400;
            color: var(--accent);
            width: 32px;
            height: 32px;
            min-width: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: rgba(0, 224, 184, 0.1);
            border: 1px solid rgba(0, 224, 184, 0.2);
            transition: all 0.3s ease;
        }

        .custom-accordion .accordion-item.is-active .accordion-title::after {
            content: "−";
            transform: rotate(180deg);
            background: rgba(0, 224, 184, 0.2);
        }

        .custom-accordion .accordion-content {
            padding: 0 24px 24px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            background: transparent !important;
            border: none !important;
        }

        .custom-accordion .accordion-content p {
            margin-bottom: 0;
            padding-top: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(180deg, var(--bg-primary), var(--bg-dark));
            border-top: 1px solid var(--border);
        }

        .cta-inner {
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            padding: 24px;
        }

        .cta-inner h2 {
            font-size: 34px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        .cta-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
        }

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

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

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

        .footer-contact ul li {
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact ul li i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #3C4764;
        }

        .footer-bottom a {
            color: #3C4764;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1023px) {
            .container {
                padding: 0 24px;
            }

            .main-nav {
                gap: 20px;
            }

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

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

        @media (max-width: 640px) {
            .container {
                padding: 0 20px;
            }

            .site-header {
                height: 64px;
            }

            .header-container {
                height: 64px;
            }

            .menu-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                width: 100%;
                height: calc(100vh - 64px);
                background: rgba(11, 16, 32, 0.92);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                justify-content: flex-start;
                align-items: center;
                gap: 0;
                padding: 40px 24px;
                transform: translateX(100%);
                transition: transform 0.35s ease;
                z-index: 999;
                overflow-y: auto;
            }

            .main-nav.open {
                transform: translateX(0);
            }

            .main-nav .nav-link {
                font-size: 20px;
                line-height: 56px;
                padding: 0;
                width: 100%;
                text-align: center;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

            .main-nav .nav-link::after {
                display: none;
            }

            .nav-cta {
                margin-top: 24px;
                width: 100%;
                justify-content: center;
            }

            .page-banner {
                min-height: 240px;
                margin-top: 64px;
            }

            .banner-content {
                padding: 40px 20px;
            }

            .page-banner h1 {
                font-size: 28px;
            }

            .banner-desc {
                font-size: 15px;
            }

            .section {
                padding: 48px 0;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .intro-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }

            .stat-card {
                padding: 18px 12px;
            }

            .stat-card .stat-num {
                font-size: 24px;
            }

            .rec-card {
                flex-direction: column;
                gap: 14px;
            }

            .rec-img {
                width: 100%;
                min-width: 0;
                aspect-ratio: 16 / 9;
            }

            .custom-accordion .accordion-title {
                padding: 18px 16px;
                font-size: 15px;
            }

            .custom-accordion .accordion-content {
                padding: 0 16px 18px;
                font-size: 14px;
            }

            .cta-inner h2 {
                font-size: 26px;
            }

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

            .btn {
                padding: 12px 24px;
                font-size: 14px;
            }

            .btn-glow {
                width: 100%;
                max-width: 280px;
            }
        }

        @media (max-width: 520px) {
            .intro-stats {
                grid-template-columns: 1fr 1fr;
            }

            .stat-card:last-child {
                grid-column: span 2;
            }

            .brand-text {
                font-size: 17px;
            }

            .page-banner h1 {
                font-size: 24px;
            }

            .card-title {
                font-size: 17px;
            }
        }

/* roulang page: article */
:root {
    --bg-primary: #0B1020;
    --bg-secondary: #111A30;
    --bg-tertiary: #0E1530;
    --bg-deep: #070B14;
    --primary: #2E6BE6;
    --primary-light: #3F7DF0;
    --accent: #00E0B8;
    --highlight: #FFC857;
    --text-light: #EAF0FF;
    --text-secondary: #9AA7C7;
    --text-muted: #5C6A8A;
    --border: rgba(255,255,255,0.10);
    --card-bg: rgba(255,255,255,0.06);
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0,0,0,0.35);
    --glow: 0 0 24px rgba(46,107,230,0.5);
    --transition: 0.25s ease;
    --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button, input, select, textarea {
    font-family: inherit;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    line-height: 1.4;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
    font-family: inherit;
    min-height: 44px;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--glow);
}

.btn-primary:hover {
    background: var(--primary-light);
    box-shadow: 0 0 36px rgba(46,107,230,0.65);
    transform: translateY(-2px);
}

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

.btn-outline {
    background: transparent;
    color: #5A8FF8;
    border: 1px solid rgba(46,107,230,0.60);
}

.btn-outline:hover {
    background: rgba(46,107,230,0.12);
    color: #7AA0F5;
}

.btn-outline:active {
    background: rgba(46,107,230,0.20);
}

.btn-text {
    color: var(--accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 4px;
}

.btn-text:hover {
    gap: 14px;
    color: var(--text-light);
}

.btn-cta {
    background: linear-gradient(135deg, var(--primary), #5A8FF8);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 48px;
    border-radius: 10px;
    box-shadow: 0 0 30px rgba(46,107,230,0.55);
    min-height: 52px;
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 44px rgba(46,107,230,0.75);
    background: linear-gradient(135deg, #3F7DF0, #6B9BF8);
}

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

/* ===== Header / Nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(11,16,32,0.86);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    z-index: 1000;
}

.header-inner {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.brand-icon svg {
    width: 30px;
    height: 30px;
    fill: var(--accent);
}

.brand-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 0;
    white-space: nowrap;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    padding: 8px 2px;
    transition: color var(--transition);
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: left var(--transition), width var(--transition);
}

.nav-link:hover {
    color: var(--text-light);
}

.nav-link:hover::after {
    left: 0;
    width: 100%;
}

.nav-link.active {
    color: var(--text-light);
}

.nav-link.active::after {
    left: 0;
    width: 100%;
}

.nav-cta {
    font-size: 14px;
    padding: 8px 20px;
    margin-left: 8px;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 10px;
    color: var(--text-light);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.nav-toggle:hover {
    background: rgba(255,255,255,0.08);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.breadcrumb a {
    color: var(--text-muted);
    transition: color var(--transition);
}

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

.breadcrumb-sep {
    font-size: 11px;
    opacity: 0.5;
    display: inline-flex;
}

.breadcrumb [aria-current="page"] {
    color: var(--text-light);
}

/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    padding: 150px 0 64px;
    background: linear-gradient(180deg, rgba(11,16,32,0.78) 0%, rgba(11,16,32,0.94) 100%), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.article-title {
    font-size: clamp(30px, 4.2vw, 48px);
    line-height: 1.25;
    font-weight: 700;
    color: var(--text-light);
    margin: 0 0 24px;
    max-width: 900px;
    letter-spacing: -0.02em;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 28px;
    padding: 18px 0;
    border-top: 1px solid rgba(255,255,255,0.08);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.meta-item {
    color: var(--text-muted);
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.meta-item i {
    color: var(--accent);
    font-size: 14px;
}

/* ===== Article Body ===== */
.article-body {
    padding: 64px 0;
    background: var(--bg-primary);
}

.article-content {
    max-width: 780px;
    margin: 0 auto;
    padding: 48px 56px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 16px 48px rgba(0,0,0,0.28);
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.75;
}

.article-content p {
    margin-bottom: 1.4em;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    color: var(--text-light);
    margin: 1.6em 0 0.8em;
    line-height: 1.4;
}

.article-content h2 {
    font-size: 26px;
    font-weight: 700;
}

.article-content h3 {
    font-size: 22px;
    font-weight: 600;
}

.article-content h4 {
    font-size: 18px;
    font-weight: 600;
}

.article-content ul,
.article-content ol {
    padding-left: 1.4em;
    margin: 16px 0 24px;
    line-height: 1.75;
}

.article-content ul li::marker {
    color: var(--accent);
}

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

.article-content blockquote {
    margin: 28px 0;
    padding: 22px 28px;
    background: rgba(46,107,230,0.10);
    border-left: 3px solid var(--accent);
    border-radius: 0 12px 12px 0;
    color: var(--text-light);
    font-size: 16px;
    font-style: normal;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 28px 0;
    border: 1px solid rgba(255,255,255,0.08);
}

.article-content a {
    color: var(--accent);
    border-bottom: 1px solid rgba(0,224,184,0.4);
    transition: border-color var(--transition), color var(--transition);
}

.article-content a:hover {
    color: var(--text-light);
    border-color: var(--text-light);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 15px;
    background: rgba(255,255,255,0.04);
    border-radius: 10px;
    overflow: hidden;
}

.article-content table th,
.article-content table td {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    text-align: left;
    color: var(--text-secondary);
}

.article-content table th {
    background: rgba(46,107,230,0.20);
    color: var(--text-light);
    font-weight: 600;
}

.article-content table tr:last-child td {
    border-bottom: none;
}

.article-content pre {
    background: rgba(0,0,0,0.35);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
    padding: 20px 24px;
    overflow-x: auto;
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
    margin: 24px 0;
}

.article-content code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* ===== Article Empty ===== */
.article-empty {
    text-align: center;
    padding: 48px 20px;
}

.empty-icon {
    font-size: 52px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.article-empty h2 {
    color: var(--text-light);
    font-size: 26px;
    margin-bottom: 12px;
}

.article-empty p {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

/* ===== Article Bottom Nav ===== */
.article-bottom {
    max-width: 780px;
    margin: 36px auto 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

/* ===== Related Section ===== */
.related-section {
    padding: 80px 0;
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255,255,255,0.04);
}

.section-header {
    margin-bottom: 44px;
}

.eyebrow {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(24px, 3vw, 32px);
    color: var(--text-light);
    margin: 0 0 12px;
    font-weight: 700;
    line-height: 1.3;
}

.section-header p {
    color: var(--text-muted);
    font-size: 15px;
}

.related-grid {
    margin: 0 -12px;
}

.related-cell {
    padding: 0 12px;
    margin-bottom: 24px;
}

.related-card {
    display: flex;
    height: 100%;
    min-height: 190px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: 14px;
    overflow: hidden;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.related-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,0.22);
    box-shadow: 0 16px 44px rgba(0,0,0,0.32);
}

.related-thumb {
    width: 40%;
    min-height: 190px;
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-tertiary);
}

.related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.35s ease;
}

.related-card:hover .related-thumb img {
    transform: scale(1.06);
}

.related-info {
    flex: 1;
    padding: 22px 20px;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.tag {
    align-self: flex-start;
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(0,224,184,0.10);
    border: 1px solid rgba(0,224,184,0.30);
    border-radius: 999px;
    margin-bottom: 12px;
    white-space: nowrap;
}

.related-info h3 {
    font-size: 16px;
    line-height: 1.45;
    color: var(--text-light);
    margin: 0 0 10px;
    font-weight: 600;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-info p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0 0 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-muted);
}

.read-link {
    color: var(--accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition);
}

.related-card:hover .read-link {
    gap: 10px;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, #0A0E1C 0%, #0B1020 70%, #101A36 100%);
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 84px 24px;
    text-align: center;
}

.cta-section h2 {
    font-size: clamp(26px, 4vw, 36px);
    font-weight: 700;
    color: var(--text-light);
    margin: 0 0 16px;
    letter-spacing: -0.01em;
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 16px;
    margin: 0 0 36px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-deep);
    padding: 64px 0 0;
    border-top: 1px solid rgba(255,255,255,0.04);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.4fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.75;
    margin-top: 16px;
    max-width: 340px;
}

.footer-title {
    color: var(--text-light);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-links li,
.footer-contact ul li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 14px;
    transition: color var(--transition);
}

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

.footer-contact ul li {
    color: var(--text-muted);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 24px 0;
    color: var(--text-muted);
    font-size: 13px;
}

.footer-bottom a {
    color: var(--text-muted);
    transition: color var(--transition);
}

.footer-bottom a:hover {
    color: var(--text-light);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }

    .main-nav {
        gap: 24px;
    }

    .related-card {
        min-height: 180px;
    }

    .related-thumb {
        min-height: 180px;
    }

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

@media (max-width: 768px) {
    .nav-toggle {
        display: inline-flex;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 320px;
        max-width: 85%;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 96px 32px 32px;
        gap: 4px;
        background: rgba(11,16,32,0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        box-shadow: -16px 0 48px rgba(0,0,0,0.5);
        transition: right 0.3s ease;
        z-index: 999;
    }

    body.nav-open .main-nav {
        right: 0;
    }

    body.nav-open::after {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 998;
    }

    .main-nav .nav-link {
        font-size: 20px;
        padding: 14px 0;
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        white-space: normal;
    }

    .main-nav .nav-link::after {
        display: none;
    }

    .main-nav .nav-cta {
        margin-top: 16px;
        width: 100%;
        text-align: center;
    }

    .article-hero {
        padding: 120px 0 48px;
    }

    .article-meta {
        gap: 10px 20px;
    }

    .article-content {
        padding: 28px 24px;
        border-radius: 12px;
    }

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

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

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

@media (max-width: 640px) {
    body {
        font-size: 15px;
    }

    .brand-text {
        font-size: 18px;
    }

    .article-title {
        font-size: 26px;
        line-height: 1.3;
    }

    .meta-item {
        font-size: 13px;
    }

    .article-content {
        padding: 22px 18px;
        font-size: 15px;
        line-height: 1.75;
    }

    .article-content h2 {
        font-size: 22px;
    }

    .article-content h3 {
        font-size: 19px;
    }

    .article-content table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .related-section {
        padding: 56px 0;
    }

    .section-header {
        margin-bottom: 32px;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .related-cell {
        padding: 0 12px;
        margin-bottom: 16px;
    }

    .related-card {
        flex-direction: column;
        min-height: 0;
    }

    .related-thumb {
        width: 100%;
        min-height: 0;
        height: 160px;
    }

    .related-info {
        padding: 18px 16px;
    }

    .cta-section {
        padding: 56px 16px;
    }

    .cta-section h2 {
        font-size: 26px;
    }

    .btn-cta {
        width: 100%;
        padding: 16px 24px;
    }

    .footer-bottom a {
        word-break: break-all;
    }
}

/* roulang page: category2 */
:root {
            --bg-primary: #0B1020;
            --bg-secondary: #0E1530;
            --bg-deep: #070B14;
            --bg-elevated: #111A30;
            --card-bg: rgba(255, 255, 255, 0.06);
            --border-color: rgba(255, 255, 255, 0.10);
            --border-hover: rgba(255, 255, 255, 0.22);
            --primary: #2E6BE6;
            --primary-hover: #3F7DF0;
            --accent: #00E0B8;
            --highlight: #FFC857;
            --text-light: #EAF0FF;
            --text-secondary: #9AA7C7;
            --text-muted: #5C6A8A;
            --text-dark: #3C4764;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(46, 107, 230, 0.5);
            --transition: 0.25s ease;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", "Arial", sans-serif;
            --font-en: "Inter", "Roboto", "Helvetica Neue", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-primary);
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
            background-size: 42px 42px;
            color: var(--text-secondary);
            line-height: 1.75;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        ::selection {
            background: rgba(0, 224, 184, 0.25);
            color: #fff;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

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

        .section {
            padding: 80px 0;
        }

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

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

        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 10px;
            font-family: var(--font-en);
        }

        .section-title {
            font-size: 32px;
            font-weight: 600;
            color: var(--text-light);
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background: rgba(11, 16, 32, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
        }

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

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
        }

        .brand-icon svg {
            width: 100%;
            height: 100%;
            fill: url(#brandGradient);
        }

        .brand-icon svg path {
            fill: var(--accent);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: 0;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 2px;
            transition: color var(--transition);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
            transform: translateX(-50%);
            transition: width var(--transition);
        }

        .nav-link:hover {
            color: #fff;
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: #fff;
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-cta {
            margin-left: 8px;
            padding: 9px 22px;
            font-size: 14px;
            border-radius: 8px;
            border: 1px solid var(--primary);
            color: var(--primary);
            background: transparent;
            font-weight: 600;
            transition: all var(--transition);
            line-height: 1.4;
        }

        .nav-cta:hover {
            background: rgba(46, 107, 230, 0.12);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
            box-shadow: 0 0 18px rgba(46, 107, 230, 0.25);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            z-index: 1001;
            border-radius: 8px;
            transition: background var(--transition);
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .menu-toggle .bar {
            width: 22px;
            height: 2px;
            background: var(--text-light);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .menu-toggle.active .bar:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .menu-toggle.active .bar:nth-child(2) {
            opacity: 0;
        }

        .menu-toggle.active .bar:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            font-family: var(--font-main);
            line-height: 1.5;
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            border: none;
            gap: 8px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 0 36px rgba(46, 107, 230, 0.65);
        }

        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 0 20px rgba(46, 107, 230, 0.45);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(46, 107, 230, 0.12);
            border-color: var(--primary-hover);
            color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(46, 107, 230, 0.2);
        }

        .btn-glow {
            background: linear-gradient(135deg, var(--primary), #4A7DF0);
            color: #fff;
            box-shadow: 0 0 28px rgba(46, 107, 230, 0.55), 0 0 12px rgba(0, 224, 184, 0.2);
            min-width: 220px;
            height: 52px;
            font-size: 16px;
            font-weight: 600;
        }

        .btn-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 42px rgba(46, 107, 230, 0.75), 0 0 20px rgba(0, 224, 184, 0.3);
            background: linear-gradient(135deg, var(--primary-hover), #5A8DF2);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        /* Hero Banner */
        .page-hero {
            position: relative;
            padding: 140px 0 60px;
            background-image: linear-gradient(rgba(11, 16, 32, 0.82), rgba(11, 16, 32, 0.94)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(0, 224, 184, 0.12) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero-inner {
            max-width: 820px;
        }

        .hero-eyebrow {
            display: inline-block;
            padding: 5px 18px;
            border-radius: 20px;
            background: rgba(0, 224, 184, 0.1);
            border: 1px solid rgba(0, 224, 184, 0.3);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            font-family: var(--font-en);
            margin-bottom: 20px;
        }

        .page-hero h1 {
            font-size: 42px;
            font-weight: 700;
            color: var(--text-light);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .page-hero .hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 640px;
            margin-bottom: 28px;
        }

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

        /* Intro / Stats */
        .intro-section {
            padding: 80px 0 20px;
        }

        .intro-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            align-items: flex-start;
            margin-bottom: 56px;
        }

        .intro-text {
            flex: 1 1 55%;
            min-width: 300px;
        }

        .intro-text h2 {
            font-size: 30px;
            font-weight: 600;
            color: var(--text-light);
            line-height: 1.35;
            margin-bottom: 16px;
        }

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

        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            position: relative;
            overflow: hidden;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 50px;
            height: 100%;
            background: linear-gradient(105deg, rgba(255, 255, 255, 0.06) 0%, transparent 100%);
            pointer-events: none;
        }

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

        .stat-number {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-light);
            font-family: var(--font-en);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        /* Content Cards */
        .content-cards-section {
            padding: 60px 0 80px;
        }

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

        .info-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
            position: relative;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

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

        .info-card .card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .info-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .info-card:hover .card-img img {
            transform: scale(1.04);
        }

        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 4px 14px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(0, 224, 184, 0.9);
            color: #0B1020;
            backdrop-filter: blur(6px);
            border: none;
        }

        .card-body {
            padding: 22px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-light);
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 14px;
        }

        .card-meta a {
            color: var(--accent);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition);
        }

        .card-meta a:hover {
            gap: 9px;
        }

        .card-wide {
            grid-column: span 2;
            display: flex;
            flex-direction: row;
            align-items: stretch;
        }

        .card-wide .card-img {
            width: 45%;
            aspect-ratio: auto;
            min-height: 220px;
        }

        .card-wide .card-body {
            width: 55%;
            padding: 28px;
        }

        /* Process Flow */
        .flow-section {
            background: var(--bg-secondary);
            padding: 80px 0;
        }

        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

        .flow-steps::before {
            content: '';
            position: absolute;
            top: 34px;
            left: 6%;
            width: 88%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            opacity: 0.35;
            border-radius: 2px;
        }

        .step-item {
            position: relative;
            text-align: center;
            padding-top: 0;
        }

        .step-icon {
            width: 68px;
            height: 68px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: rgba(46, 107, 230, 0.15);
            border: 1px solid rgba(46, 107, 230, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent);
            position: relative;
            z-index: 2;
            backdrop-filter: blur(6px);
            box-shadow: 0 0 20px rgba(46, 107, 230, 0.25);
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Featured Reading */
        .featured-section {
            padding: 80px 0;
        }

        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .featured-card {
            display: flex;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            backdrop-filter: blur(12px);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

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

        .featured-card .featured-img {
            width: 42%;
            min-height: 200px;
            overflow: hidden;
        }

        .featured-card .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .featured-card:hover .featured-img img {
            transform: scale(1.04);
        }

        .featured-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .featured-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-light);
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .featured-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .featured-body .featured-link {
            font-size: 13px;
            font-weight: 500;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition);
        }

        .featured-body .featured-link:hover {
            gap: 9px;
        }

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

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(12px);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

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

        .faq-item.active {
            border-left: 3px solid var(--accent);
        }

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

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            min-width: 28px;
            border-radius: 8px;
            background: rgba(0, 224, 184, 0.1);
            border: 1px solid rgba(0, 224, 184, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--accent);
            transition: all 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 224, 184, 0.2);
        }

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

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(180deg, #0A0E1C 0%, var(--bg-primary) 100%);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
        }

        .cta-card {
            max-width: 800px;
            margin: 0 auto;
        }

        .cta-card h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .cta-card p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .cta-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 18px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-deep);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
            margin-top: 10px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

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

        .footer-links a,
        .footer-contact li {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
            line-height: 1.6;
        }

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

        .footer-contact li i {
            width: 20px;
            color: var(--accent);
            margin-right: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: var(--text-dark);
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .card-wide {
                grid-column: span 2;
            }

            .card-wide .card-img {
                width: 40%;
            }

            .card-wide .card-body {
                width: 60%;
            }

            .flow-steps {
                gap: 20px;
            }
        }

        @media screen and (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .page-hero {
                padding: 120px 0 50px;
            }

            .page-hero h1 {
                font-size: 34px;
            }

            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

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

            .card-wide {
                grid-column: auto;
                flex-direction: column;
            }

            .card-wide .card-img,
            .card-wide .card-body {
                width: 100%;
            }

            .card-wide .card-img {
                min-height: 180px;
            }

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

            .flow-steps::before {
                display: none;
            }

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

            .featured-card {
                flex-direction: column;
            }

            .featured-card .featured-img {
                width: 100%;
                min-height: 180px;
            }

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

        @media screen and (max-width: 640px) {
            .menu-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 0;
                right: -100%;
                width: 100%;
                height: 100vh;
                background: rgba(11, 16, 32, 0.94);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                display: flex;
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 0;
                transition: right 0.35s ease;
                z-index: 999;
            }

            .main-nav.nav-open {
                right: 0;
            }

            .main-nav .nav-link {
                font-size: 20px;
                line-height: 56px;
                color: var(--text-light);
                padding: 0 20px;
            }

            .main-nav .nav-link::after {
                display: none;
            }

            .main-nav .nav-link.active {
                color: var(--accent);
            }

            .nav-cta {
                margin-top: 24px;
                font-size: 15px;
                padding: 12px 36px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

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

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

            .section-title {
                font-size: 26px;
            }

            .stats-row {
                grid-template-columns: 1fr 1fr;
            }

            .flow-steps {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr;
            }

            .page-hero {
                padding: 110px 0 40px;
            }

            .page-hero h1 {
                font-size: 27px;
            }

            .hero-sub {
                font-size: 14px;
            }

            .section-title {
                font-size: 24px;
            }

            .section-desc {
                font-size: 14px;
            }

            .card-body h3 {
                font-size: 16px;
            }

            .btn-glow {
                min-width: 100%;
            }
        }