/* roulang page: index */
:root {
    --primary: #0b1f3a;
    --primary-light: #123a5e;
    --accent: #c8a45d;
    --accent-light: #e0c078;
    --bg: #f4f6f9;
    --bg-white: #ffffff;
    --bg-dark: #0b1f3a;
    --text: #1a2b3c;
    --text-light: #5f7080;
    --border: #e6e9ee;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --shadow: 0 10px 40px rgba(0,0,0,.07);
    --shadow-hover: 0 20px 50px rgba(0,0,0,.12);
    --transition: .3s cubic-bezier(.4,0,.2,1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 24px rgba(0,0,0,.04);
}
.header-brand-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}
.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}
.logo-mark {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 20px;
    margin-right: 12px;
    vertical-align: middle;
}
.logo-text { display: inline-block; vertical-align: middle; }
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    border-radius: 8px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}
.header-channel-row {
    border-top: 1px solid var(--border);
    padding: 0;
}
.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 4px 0;
}
.nav-list a {
    display: block;
    padding: 12px 20px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    border-radius: 10px;
    white-space: nowrap;
    position: relative;
}
.nav-list a:hover { color: var(--accent); background: rgba(200,164,93,.08); }
.nav-list a.active {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    box-shadow: 0 4px 14px rgba(11,31,58,.2);
}
.nav-list a.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    border-radius: 3px;
    background: var(--accent);
}

.hero {
    position: relative;
    min-height: 640px;
    display: flex;
    align-items: center;
    background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    isolation: isolate;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(11,31,58,.94) 0%, rgba(11,31,58,.75) 45%, rgba(11,31,58,.4) 80%);
    z-index: -1;
}
.hero-content {
    max-width: 720px;
    padding: 100px 0;
}
.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,.12);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 50px;
    padding: 6px 18px;
    font-size: 13px;
    letter-spacing: 2px;
    color: #e8d8b8;
    text-transform: uppercase;
    margin-bottom: 28px;
    backdrop-filter: blur(8px);
}
.hero-kicker::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(200,164,93,.2);
}
.hero h1 {
    font-size: 50px;
    font-weight: 800;
    line-height: 1.2;
    color: #fff;
    letter-spacing: 1px;
    margin-bottom: 20px;
}
.hero h1 span {
    color: var(--accent-light);
}
.hero-sub {
    font-size: 20px;
    color: rgba(255,255,255,.9);
    font-weight: 600;
    margin-bottom: 16px;
}
.hero-desc {
    font-size: 16px;
    color: rgba(255,255,255,.75);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 580px;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 700;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #0b1f3a;
    box-shadow: 0 8px 24px rgba(200,164,93,.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(200,164,93,.45);
}
.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,.4);
}
.btn-outline:hover {
    border-color: #fff;
    background: rgba(255,255,255,.1);
    transform: translateY(-2px);
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,.15);
}
.hero-stat { text-align: left; }
.hero-stat-num {
    font-size: 34px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    display: block;
}
.hero-stat-num em {
    font-style: normal;
    color: var(--accent-light);
    font-size: 22px;
    margin-left: 2px;
}
.hero-stat-label {
    font-size: 13px;
    color: rgba(255,255,255,.6);
    margin-top: 8px;
    letter-spacing: 1px;
}

.section { padding: 90px 0; }
.section-alt { background: var(--bg-white); }
.section-kicker {
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 12px;
}
.section-title {
    font-size: 36px;
    font-weight: 800;
    text-align: center;
    line-height: 1.3;
    color: var(--primary);
    margin-bottom: 16px;
}
.section-desc {
    text-align: center;
    color: var(--text-light);
    max-width: 640px;
    margin: 0 auto 50px;
    font-size: 16px;
}
.section-line {
    width: 60px;
    height: 3px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    margin: 0 auto 16px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.feature-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
    width: 68px;
    height: 68px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(11,31,58,.06), rgba(200,164,93,.12));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    margin-bottom: 24px;
    color: var(--primary);
    transition: var(--transition);
}
.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    box-shadow: 0 10px 24px rgba(11,31,58,.25);
}
.feature-card h3 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.8; }

.cat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.cat-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    display: block;
}
.cat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.cat-card-img {
    position: relative;
    height: 220px;
    overflow: hidden;
}
.cat-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
}
.cat-card:hover .cat-card-img img { transform: scale(1.06); }
.cat-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(11,31,58,.2));
}
.cat-card-body { padding: 24px; }
.cat-card-tag {
    display: inline-block;
    background: rgba(200,164,93,.15);
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 30px;
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.cat-card-body h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.cat-card-body p { font-size: 13px; color: var(--text-light); line-height: 1.7; }
.cat-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    margin-top: 16px;
}
.cat-card-link::after {
    content: '→';
    transition: transform var(--transition);
}
.cat-card:hover .cat-card-link::after { transform: translateX(4px); }

.stats-section {
    background: linear-gradient(135deg, #081526 0%, #0b1f3a 50%, #123a5e 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.stats-section::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -20%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: rgba(200,164,93,.08);
    pointer-events: none;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    position: relative;
    z-index: 1;
}
.stat-item { text-align: center; }
.stat-item-num {
    font-size: 52px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}
.stat-item-num .sign { color: var(--accent); font-size: 36px; }
.stat-item-label {
    font-size: 14px;
    color: rgba(255,255,255,.6);
    margin-top: 14px;
    letter-spacing: 1px;
}
.stat-item-line {
    width: 30px;
    height: 2px;
    background: var(--accent);
    margin: 16px auto 0;
    border-radius: 2px;
}

.news-section { background: var(--bg); }
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.news-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.news-cat {
    font-size: 12px;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 30px;
    background: var(--primary);
    color: #fff;
    letter-spacing: 1px;
}
.news-date { font-size: 13px; color: var(--text-light); }
.news-card h3 {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card h3 a:hover { color: var(--accent); }
.news-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card-more {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    margin-top: 16px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.news-card-more::after { content: '→'; }
.news-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border);
    color: var(--text-light);
    font-size: 15px;
}

.process-section { background: var(--bg-white); }
.process-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}
.process-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--primary-light), var(--accent));
    transform: translateX(-50%);
    border-radius: 3px;
}
.process-item {
    position: relative;
    display: flex;
    justify-content: flex-end;
    padding: 20px 0;
    width: 50%;
}
.process-item:nth-child(even) {
    justify-content: flex-start;
    left: 50%;
}
.process-item-inner {
    width: 80%;
    background: var(--bg);
    border-radius: var(--radius-md);
    padding: 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    position: relative;
}
.process-item:hover .process-item-inner {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}
.process-num {
    position: absolute;
    top: 20px;
    right: -15px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-weight: 800;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(200,164,93,.4);
    z-index: 1;
}
.process-item:nth-child(even) .process-num { left: -15px; right: auto; }
.process-item-inner h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.process-item-inner p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

.faq-section { background: var(--bg); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: #fff;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,.03);
    transition: box-shadow var(--transition);
}
.faq-item.open { box-shadow: var(--shadow); }
.faq-question {
    width: 100%;
    text-align: left;
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}
.faq-question::after {
    content: '+';
    font-size: 24px;
    color: var(--accent);
    transition: transform var(--transition);
    flex-shrink: 0;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s ease, padding .4s ease;
    padding: 0 28px;
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
}
.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 28px 24px;
}

.cta-section {
    position: relative;
    background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
    padding: 100px 0;
    isolation: isolate;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(11,31,58,.96), rgba(11,31,58,.85), rgba(123,90,45,.7));
    z-index: -1;
}
.cta-content { text-align: center; max-width: 700px; margin: 0 auto; }
.cta-title {
    font-size: 38px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 20px;
}
.cta-desc {
    font-size: 16px;
    color: rgba(255,255,255,.8);
    margin-bottom: 40px;
    line-height: 1.8;
}
.cta-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

.site-footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,.7);
    padding: 70px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 50px;
}
.footer-about h3 {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}
.footer-about p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,.55);
    max-width: 360px;
}
.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a {
    font-size: 14px;
    color: rgba(255,255,255,.55);
    transition: all var(--transition);
    display: inline-block;
}
.footer-col ul a:hover { color: var(--accent); transform: translateX(4px); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,.4);
}
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--accent); }

@media (max-width: 1024px) {
    .hero h1 { font-size: 40px; }
    .cat-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { gap: 24px; }
    .stat-item-num { font-size: 42px; }
}

@media (max-width: 768px) {
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .nav-toggle { display: flex; }
    .header-channel-row {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: 0 20px 30px rgba(0,0,0,.1);
        border-top: 1px solid var(--border);
    }
    .header-channel-row.open { display: block; }
    .nav-list { flex-direction: column; padding: 12px 0; }
    .nav-list a { padding: 14px 24px; border-radius: 0; border-bottom: 1px solid var(--border); }
    .nav-list a.active { background: rgba(11,31,58,.05); color: var(--primary); box-shadow: none; }
    .nav-list a.active::after { display: none; }
    .hero { min-height: 540px; }
    .hero h1 { font-size: 34px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; padding-top: 30px; }
    .hero-stat-num { font-size: 28px; }
    .features-grid { grid-template-columns: 1fr; gap: 20px; }
    .cat-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .stat-item-num { font-size: 36px; }
    .process-timeline::before { left: 20px; }
    .process-item { width: 100%; justify-content: flex-end; padding-left: 50px; }
    .process-item:nth-child(even) { left: 0; justify-content: flex-end; padding-left: 50px; }
    .process-item-inner, .process-item:nth-child(even) .process-item-inner { width: 100%; }
    .process-num, .process-item:nth-child(even) .process-num { right: auto; left: -15px; }
    .cta-title { font-size: 28px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .hero-btns, .cta-btns { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
}

@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 28px; }
    .hero-desc { font-size: 14px; }
    .hero-stat-num { font-size: 22px; }
    .hero-stat-label { font-size: 12px; }
    .section-title { font-size: 24px; }
    .stats-grid { gap: 20px; }
    .stat-item-num { font-size: 30px; }
    .faq-question { padding: 18px 20px; font-size: 14px; }
    .faq-answer { padding: 0 20px; }
    .faq-item.open .faq-answer { padding: 0 20px 20px; }
}

a:focus-visible, button:focus-visible {
    outline: 3px solid rgba(200,164,93,.6);
    outline-offset: 2px;
}

/* roulang page: category1 */
/* ========== Design Variables ========== */
:root {
  --primary: #0b1f3a;
  --primary-light: #163257;
  --primary-dark: #071426;
  --accent: #c9a45d;
  --accent-light: #dab97f;
  --accent-dark: #a37e3a;
  --bg-body: #f5f6f8;
  --bg-surface: #ffffff;
  --bg-muted: #eef1f5;
  --text-main: #1c2128;
  --text-weak: #67707d;
  --text-invert: #ffffff;
  --border: #e3e7ee;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-xs: 0 1px 3px rgba(16, 26, 40, .05);
  --shadow-sm: 0 4px 14px rgba(16, 26, 40, .07);
  --shadow-md: 0 10px 30px rgba(16, 26, 40, .10);
  --shadow-lg: 0 20px 50px rgba(16, 26, 40, .16);
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 28px;
  --spacing-lg: 48px;
  --spacing-xl: 72px;
  --container-width: 1200px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .25s ease, opacity .25s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ========== Container & Layout ========== */
.container { width: 100%; max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }

/* ========== Buttons & Badges ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .3px;
  transition: background .25s ease, color .25s ease, transform .2s ease, box-shadow .25s ease;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 14px rgba(201,164,93,.35); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,164,93,.45); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(11,31,58,.16); }
.btn-dark { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(11,31,58,.30); }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(11,31,58,.36); }

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 40px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .4px;
  background: rgba(201,164,93,.14);
  color: var(--accent-dark);
  border: 1px solid rgba(201,164,93,.35);
}
.tag-light { background: rgba(255,255,255,.18); color: #fff; border-color: rgba(255,255,255,.4); }

/* ========== Header & Navigation ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1200;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(16,26,40,.05);
}
.site-header .container { display: flex; flex-direction: column; }
.header-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--accent);
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 6px 18px rgba(11,31,58,.25);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: .6px;
  white-space: nowrap;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 8px;
  background: var(--bg-muted);
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--primary); border-radius: 2px; margin: 0 auto; transition: transform .3s ease, opacity .3s ease; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.header-channel-row { border-top: 1px solid var(--border); }
.nav-list { display: flex; align-items: center; gap: 4px; padding: 0 0 6px; overflow-x: auto; scrollbar-width: none; }
.nav-list::-webkit-scrollbar { display: none; }
.nav-list a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-weak);
  border-radius: 999px;
  transition: background .25s ease, color .25s ease;
  white-space: nowrap;
}
.nav-list a:hover { color: var(--primary); background: var(--bg-muted); }
.nav-list a.active { color: var(--primary); background: rgba(201,164,93,.16); }
.nav-list .nav-cta { margin-left: auto; background: var(--primary); color: #fff; border-radius: 999px; padding: 8px 20px; }
.nav-list .nav-cta:hover { background: var(--primary-light); color: #fff; transform: translateY(-1px); }

/* ========== Page Banner ========== */
.page-banner {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 360px;
  padding: 72px 0 80px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(7,20,38,.88) 0%, rgba(7,20,38,.65) 50%, rgba(7,20,38,.30) 100%);
}
.page-banner .container { position: relative; z-index: 2; }
.banner-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 18px;
  color: rgba(255,255,255,.78);
}
.banner-breadcrumb a:hover { color: var(--accent-light); }
.banner-breadcrumb .sep { opacity: .5; }
.page-banner h1 { font-size: clamp(32px, 5vw, 48px); font-weight: 700; letter-spacing: 1px; line-height: 1.25; margin-bottom: 14px; }
.page-banner p { font-size: 16px; max-width: 640px; color: rgba(255,255,255,.9); line-height: 1.8; }

/* ========== Section Common ========== */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-surface); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-head .section-tag { display: inline-block; margin-bottom: 12px; }
.section-head h2 { font-size: clamp(24px, 3vw, 32px); color: var(--primary); font-weight: 700; letter-spacing: .5px; line-height: 1.35; margin-bottom: 12px; }
.section-head h2 .accent-word { color: var(--accent-dark); }
.section-head p { color: var(--text-weak); font-size: 15px; line-height: 1.8; }

/* ========== Stats Grid ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.stat-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(201,164,93,.13);
  color: var(--accent-dark);
  font-size: 24px;
  margin-bottom: 14px;
}
.stat-card .stat-num { font-size: 38px; font-weight: 800; color: var(--primary); line-height: 1.1; letter-spacing: .5px; }
.stat-card .stat-num span { color: var(--accent); }
.stat-card .stat-label { font-size: 14px; color: var(--text-weak); margin-top: 6px; }

/* ========== Theme Grid ========== */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.theme-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 280px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: flex-end;
  color: #fff;
  transition: transform .35s ease, box-shadow .35s ease;
}
.theme-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.theme-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.theme-card:hover img { transform: scale(1.06); }
.theme-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,31,58,0) 30%, rgba(7,20,38,.86) 100%);
  z-index: 1;
}
.theme-card-content { position: relative; z-index: 2; padding: 28px 24px; width: 100%; }
.theme-card .theme-card-title { font-size: 20px; font-weight: 700; letter-spacing: .4px; margin-bottom: 6px; }
.theme-card .theme-card-desc { font-size: 13px; line-height: 1.7; opacity: .9; margin-bottom: 14px; }
.theme-card .theme-card-link { font-size: 13px; font-weight: 600; color: var(--accent-light); display: inline-flex; align-items: center; gap: 4px; }
.theme-card .theme-card-link::after { content: "→"; transition: transform .25s ease; }
.theme-card:hover .theme-card-link::after { transform: translateX(4px); }

/* ========== Recommend Section ========== */
.section-recommend { background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; position: relative; }
.section-recommend::before { content: ""; position: absolute; inset: 0; background: rgba(11,31,58,.93); }
.section-recommend .container { position: relative; z-index: 2; }
.section-recommend .section-head h2 { color: #fff; }
.section-recommend .section-head p { color: rgba(255,255,255,.75); }
.recommend-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.recommend-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform .3s ease, box-shadow .3s ease;
}
.recommend-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.recommend-media { position: relative; height: 180px; overflow: hidden; }
.recommend-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.recommend-card:hover .recommend-media img { transform: scale(1.05); }
.recommend-media .recommend-tag { position: absolute; top: 14px; left: 14px; z-index: 1; }
.recommend-body { padding: 24px 24px 28px; flex: 1; display: flex; flex-direction: column; }
.recommend-body h3 { font-size: 18px; color: var(--primary); margin-bottom: 8px; font-weight: 700; }
.recommend-body p { font-size: 14px; color: var(--text-weak); line-height: 1.75; flex: 1; }
.recommend-body .recommend-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; font-size: 13px; color: var(--text-weak); }
.recommend-body .recommend-meta .price { color: var(--accent-dark); font-weight: 700; font-size: 15px; }

/* ========== Process Timeline ========== */
.process-section { background: var(--bg-muted); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; }
.process-step { position: relative; text-align: center; padding: 0 8px; }
.process-step::before {
  content: "";
  position: absolute;
  top: 26px;
  left: -50%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent) 0%, rgba(201,164,93,.35) 100%);
  z-index: 0;
}
.process-step:first-child::before { display: none; }
.process-step-inner { position: relative; z-index: 1; }
.process-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--accent);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  box-shadow: 0 0 0 8px var(--bg-muted), 0 0 0 9px rgba(201,164,93,.35);
}
.process-step h3 { font-size: 16px; color: var(--primary); margin-bottom: 8px; font-weight: 700; }
.process-step p { font-size: 13px; color: var(--text-weak); line-height: 1.7; }

/* ========== FAQ ========== */
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  transition: box-shadow .3s ease;
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item.is-open { border-color: rgba(201,164,93,.5); box-shadow: var(--shadow-sm); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  text-align: left;
  background: none;
  transition: background .25s ease;
}
.faq-q:hover { background: var(--bg-muted); }
.faq-q .faq-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(201,164,93,.14);
  color: var(--accent-dark);
  font-size: 18px;
  transition: transform .3s ease;
}
.faq-item.is-open .faq-icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a-inner { padding: 0 24px 22px; font-size: 14px; color: var(--text-weak); line-height: 1.8; }

/* ========== CTA Section ========== */
.cta-section {
  position: relative;
  padding: 88px 0;
  background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  color: #fff;
  text-align: center;
}
.cta-section::before { content: ""; position: absolute; inset: 0; background: rgba(11,31,58,.84); }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 700; margin-bottom: 12px; letter-spacing: .5px; }
.cta-section p { font-size: 15px; color: rgba(255,255,255,.85); max-width: 600px; margin: 0 auto 32px; line-height: 1.8; }
.cta-section .btn-group { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ========== Footer ========== */
.site-footer { background: #081422; color: rgba(255,255,255,.72); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-about h3 { color: #fff; font-size: 20px; font-weight: 700; letter-spacing: .5px; margin-bottom: 14px; }
.footer-about p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.62); max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; letter-spacing: .4px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,.62); transition: color .25s ease, padding-left .25s ease; }
.footer-col ul li a:hover { color: var(--accent-light); padding-left: 6px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 24px 0; flex-wrap: wrap; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.5); }
.footer-bottom a { color: rgba(255,255,255,.6); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .theme-grid { grid-template-columns: repeat(2, 1fr); }
  .recommend-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); row-gap: 48px; }
  .process-step::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 56px 0; }
  .nav-toggle { display: flex; }
  .header-channel-row { display: none; border-top: none; }
  .header-channel-row.is-open { display: block; border-top: 1px solid var(--border); }
  .nav-list { flex-direction: column; align-items: stretch; gap: 4px; padding: 12px 0 16px; }
  .nav-list a { padding: 12px 20px; border-radius: 10px; }
  .nav-list .nav-cta { margin-left: 0; text-align: center; }
  .logo-text { font-size: 17px; }
  .page-banner { min-height: 300px; padding: 56px 0 64px; }
  .page-banner h1 { font-size: 30px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .section { padding: 44px 0; }
  .stats-grid { grid-template-columns: 1fr; }
  .theme-grid { grid-template-columns: 1fr; }
  .recommend-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; row-gap: 36px; }
  .btn { width: 100%; justify-content: center; }
  .page-banner p { font-size: 14px; }
  .page-banner h1 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; }
  .faq-q { padding: 16px 18px; font-size: 14px; }
  .faq-a-inner { padding: 0 18px 18px; }
  .cta-section { padding: 56px 0; }
  .cta-section .btn-group { flex-direction: column; }
}

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
    --primary: #1a2b4a;
    --primary-light: #2f4368;
    --accent: #c9a862;
    --accent-deep: #a8873d;
    --bg-body: #f5f6f8;
    --bg-white: #ffffff;
    --bg-soft: #eef1f6;
    --text-main: #1c2635;
    --text-sub: #4d5f73;
    --text-muted: #8494a7;
    --border-line: #e2e7ef;
    --radius: 14px;
    --radius-lg: 22px;
    --radius-sm: 8px;
    --shadow-base: 0 6px 22px rgba(26, 43, 74, 0.07);
    --shadow-hover: 0 14px 34px rgba(26, 43, 74, 0.13);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}
/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-main);
    background: var(--bg-body);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; transition: color var(--transition), background var(--transition), border-color var(--transition); }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0 0 12px; line-height: 1.3; font-weight: 700; color: var(--text-main); }
p { margin: 0 0 16px; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
/* ========== Header & Nav ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-line);
    box-shadow: 0 2px 14px rgba(26, 43, 74, 0.04);
}
.header-brand-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), #3b5686);
    color: #fff;
    font-size: 20px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 14px rgba(26, 43, 74, 0.25);
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    letter-spacing: 0.5px;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: 1px solid var(--border-line);
    border-radius: 10px;
    padding: 10px 12px;
    cursor: pointer;
    transition: border-color var(--transition);
}
.nav-toggle:hover { border-color: var(--accent); }
.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.header-channel-row {
    border-top: 1px solid var(--border-line);
    background: #fafbfd;
}
.nav-list {
    display: flex;
    align-items: center;
    gap: 2px;
    overflow-x: auto;
    scrollbar-width: none;
}
.nav-list::-webkit-scrollbar { display: none; }
.nav-list a {
    display: inline-flex;
    align-items: center;
    padding: 13px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-sub);
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: color 0.25s, border-color 0.25s;
}
.nav-list a:hover { color: var(--primary); }
.nav-list a.active {
    color: var(--primary);
    font-weight: 600;
    border-bottom-color: var(--accent);
}
/* ========== 按钮 & 徽章 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    background: transparent;
    color: inherit;
}
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(26, 43, 74, 0.25);
}
.btn-accent {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.btn-accent:hover {
    background: var(--accent-deep);
    border-color: var(--accent-deep);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(201, 168, 98, 0.35);
}
.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
}
.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
}
.badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-deep);
    background: rgba(201, 168, 98, 0.15);
    border-radius: 999px;
}
/* ========== Article Banner ========== */
.article-banner {
    position: relative;
    background: linear-gradient(rgba(26, 43, 74, 0.78), rgba(20, 34, 60, 0.86)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    padding: 64px 0;
    color: #fff;
}
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
}
.breadcrumb a { color: rgba(255, 255, 255, 0.85); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { opacity: 0.5; }
.breadcrumb-current {
    color: rgba(255, 255, 255, 0.95);
    max-width: 320px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-banner h1 {
    font-size: 34px;
    line-height: 1.35;
    margin: 18px 0 14px;
    max-width: 820px;
    color: #fff;
    word-break: break-word;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.meta-item::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}
/* ========== 文章主体 ========== */
.article-section { padding: 56px 0; }
.article-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 36px;
    align-items: start;
}
.article-content {
    background: var(--bg-white);
    border: 1px solid var(--border-line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-base);
    padding: 44px;
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-main);
    overflow-wrap: break-word;
}
.article-content h2 {
    font-size: 26px;
    margin: 32px 0 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--bg-soft);
}
.article-content h3 {
    font-size: 21px;
    margin: 26px 0 12px;
}
.article-content h4 { font-size: 18px; margin: 20px 0 10px; }
.article-content p { margin: 14px 0; }
.article-content ul,
.article-content ol {
    padding-left: 24px;
    margin: 14px 0;
    list-style: disc;
}
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 6px; }
.article-content img {
    border-radius: var(--radius);
    margin: 22px 0;
    box-shadow: var(--shadow-base);
}
.article-content blockquote {
    margin: 22px 0;
    padding: 18px 24px;
    background: var(--bg-soft);
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-sub);
}
.article-content a { color: var(--accent-deep); text-decoration: underline; }
.article-content code {
    background: var(--bg-soft);
    padding: 2px 6px;
    border-radius: 6px;
    font-size: 14px;
}
.article-content pre {
    background: #1e2935;
    color: #e6edf3;
    padding: 18px 22px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.7;
}
.article-content pre code { background: transparent; color: inherit; padding: 0; }
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 22px 0;
    font-size: 14px;
}
.article-content table th,
.article-content table td {
    padding: 10px 14px;
    border: 1px solid var(--border-line);
    text-align: left;
}
.article-content table th {
    background: var(--bg-soft);
    font-weight: 600;
}
.article-content hr {
    border: none;
    border-top: 1px solid var(--border-line);
    margin: 28px 0;
}
/* ========== 侧栏 ========== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 120px;
}
.side-card {
    background: var(--bg-white);
    border: 1px solid var(--border-line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-base);
    padding: 24px;
}
.side-card h3 {
    font-size: 18px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--bg-soft);
    position: relative;
}
.side-card h3::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 34px;
    height: 2px;
    background: var(--accent);
}
.side-list li {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    padding: 8px 0;
    color: var(--text-sub);
    border-bottom: 1px dashed var(--border-line);
}
.side-list li:last-child { border-bottom: none; }
.side-list .label { color: var(--text-muted); flex-shrink: 0; margin-right: 12px; }
.side-list .value {
    text-align: right;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.side-card-accent {
    background: linear-gradient(135deg, var(--primary), #334b75);
    color: #fff;
    border: none;
}
.side-card-accent h3 { color: #fff; border-bottom-color: rgba(255, 255, 255, 0.2); }
.side-card-accent h3::after { background: var(--accent); }
.side-card-accent p { color: rgba(255, 255, 255, 0.75); font-size: 14px; }
.side-card-accent .btn { margin-top: 6px; }
/* ========== 相关推荐 ========== */
.related-section {
    padding: 56px 0;
    background: var(--bg-soft);
}
.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 16px;
    flex-wrap: wrap;
}
.section-head h2 {
    font-size: 28px;
    margin-bottom: 4px;
}
.section-head p { color: var(--text-muted); margin: 0; }
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-white);
    border-radius: var(--radius);
    border: 1px solid var(--border-line);
    box-shadow: var(--shadow-base);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}
.related-card-media {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-soft);
}
.related-card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}
.related-card:hover .related-card-media img { transform: scale(1.04); }
.related-card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}
.related-card .badge { align-self: flex-start; }
.related-card h3 {
    font-size: 16px;
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card p {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card time { font-size: 13px; color: var(--text-muted); }
.related-empty {
    background: var(--bg-white);
    border: 1px solid var(--border-line);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    color: var(--text-muted);
}
/* ========== CTA ========== */
.cta-section {
    background: linear-gradient(135deg, var(--primary), #2a4270);
    padding: 64px 0;
    text-align: center;
    color: #fff;
}
.cta-section h2 {
    color: #fff;
    font-size: 30px;
    margin-bottom: 12px;
}
.cta-section p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 16px;
    max-width: 560px;
    margin: 0 auto 28px;
}
.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
/* ========== 未找到 ========== */
.notfound-section {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 72px 0;
}
.notfound-box {
    background: var(--bg-white);
    border: 1px solid var(--border-line);
    border-radius: var(--radius-lg);
    padding: 56px 64px;
    text-align: center;
    max-width: 560px;
    margin: 0 auto;
    box-shadow: var(--shadow-base);
}
.notfound-box h1 { font-size: 30px; margin-bottom: 12px; }
.notfound-box p { color: var(--text-muted); margin-bottom: 24px; }
/* ========== Footer ========== */
.site-footer {
    background: #14213a;
    color: rgba(255, 255, 255, 0.7);
    padding: 56px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.4fr;
    gap: 48px;
    padding-bottom: 36px;
}
.footer-about h3 { color: #fff; font-size: 20px; margin-bottom: 14px; }
.footer-about p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 0;
}
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
    color: rgba(255, 255, 255, 0.65);
    font-size: 14px;
    transition: color 0.3s, padding-left 0.3s;
}
.footer-col ul li a:hover {
    color: var(--accent);
    padding-left: 4px;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding: 22px 0;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.65); }
.footer-bottom a:hover { color: var(--accent); }
/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .article-grid { grid-template-columns: 1fr; }
    .sidebar {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }
    .side-card { flex: 1; min-width: 260px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .header-brand-row { flex-wrap: wrap; }
    .nav-toggle { display: inline-flex; }
    .header-channel-row {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease, border-color 0.4s ease;
        padding: 0;
        border-top: none;
    }
    .header-channel-row.open {
        max-height: 320px;
        padding: 8px 0;
        border-top: 1px solid var(--border-line);
    }
    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    .nav-list a {
        border-bottom: none;
        border-left: 3px solid transparent;
        padding: 14px 16px;
    }
    .nav-list a.active {
        border-left-color: var(--accent);
        border-bottom: none;
    }
    .article-banner { padding: 48px 0; }
    .article-banner h1 { font-size: 26px; }
    .article-content { padding: 28px 24px; }
    .related-grid { grid-template-columns: 1fr; }
    .cta-section { padding: 48px 0; }
    .cta-section h2 { font-size: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .notfound-box { padding: 40px 28px; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .logo-text { font-size: 17px; }
    .logo-mark { width: 36px; height: 36px; font-size: 17px; border-radius: 10px; }
    .article-meta { flex-direction: column; gap: 8px; }
    .article-banner h1 { font-size: 22px; }
    .related-grid { grid-template-columns: 1fr; }
    .cta-buttons { flex-direction: column; align-items: center; }
    .notfound-box { padding: 32px 20px; }
    .notfound-box h1 { font-size: 22px; }
}