/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
    --primary: #ff6b2b;
    --primary-dark: #e6551a;
    --primary-light: #fff1e8;
    --accent: #ffb800;
    --accent-soft: #fff7dd;
    --dark: #1a1f2e;
    --dark-soft: #252b3d;
    --text: #2c3245;
    --text-light: #6b7280;
    --bg: #f5f6fb;
    --white: #ffffff;
    --border: #e6e8f0;
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 10px rgba(26, 31, 46, 0.05);
    --shadow: 0 10px 34px rgba(26, 31, 46, 0.08);
    --shadow-lg: 0 16px 48px rgba(255, 107, 43, 0.16);
    --transition: all .3s ease;
    --space: 24px;
}

/* ========== 基础重置 ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

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

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

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

button,
input {
    font-family: inherit;
    border: none;
    outline: none;
    background: none;
}

ul,
ol {
    list-style: none;
}

.container {
    width: min(1200px, 92%);
    margin: 0 auto;
}

/* ========== 通用按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #ff9142);
    color: #fff;
    box-shadow: 0 8px 24px rgba(255, 107, 43, 0.32);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(255, 107, 43, 0.42);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

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

.btn-ghost {
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(6px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.26);
    border-color: #fff;
    transform: translateY(-2px);
}

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

.btn-dark:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

.btn:focus-visible {
    outline: 3px solid rgba(255, 107, 43, 0.4);
    outline-offset: 2px;
}

/* ========== 徽章 / 标签 ========== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.3;
    border: 1px solid rgba(255, 107, 43, 0.18);
}

.badge-light {
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.32);
}

/* ========== 头部导航 ========== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 10px rgba(26, 31, 46, 0.04);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 74px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 23px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: 0;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    font-weight: 900;
    box-shadow: 0 6px 16px rgba(255, 107, 43, 0.3);
    flex-shrink: 0;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-name {
    font-size: 19px;
    font-weight: 800;
}

.nav-desktop {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    position: relative;
    display: inline-block;
    padding: 10px 18px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    transition: var(--transition);
}

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

.nav-link.active {
    color: var(--primary-dark);
    background: var(--primary-light);
    font-weight: 700;
}

.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 6px;
    left: 50%;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    transform: translateX(-50%);
}

.nav-cta {
    margin-left: 12px;
    padding: 9px 24px;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--primary), #ff9142);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 6px 18px rgba(255, 107, 43, 0.28);
    transition: var(--transition);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(255, 107, 43, 0.4);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--primary-light);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    width: 20px;
    height: 2.4px;
    background: var(--primary-dark);
    border-radius: 3px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7.4px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7.4px) rotate(-45deg);
}

.mobile-menu {
    display: none;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 14px 4%;
}

.mobile-menu.open {
    display: block;
}

.mobile-menu .nav-link {
    display: block;
    padding: 14px 12px;
    border-radius: 12px;
    margin-bottom: 4px;
}

.mobile-menu .nav-cta {
    display: block;
    text-align: center;
    margin-top: 8px;
    margin-left: 0;
}

/* ========== Hero 首屏 ========== */
.hero {
    position: relative;
    min-height: 680px;
    display: flex;
    align-items: center;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 78% 22%, rgba(255, 164, 64, 0.30), transparent 60%),
                linear-gradient(110deg, rgba(16, 20, 36, 0.88) 30%, rgba(16, 20, 36, 0.55) 72%, rgba(255, 107, 43, 0.30) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 90px 0;
    color: #fff;
    max-width: 720px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 50px;
    font-size: 14px;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(4px);
    margin-bottom: 26px;
}

.hero h1 {
    font-size: clamp(34px, 5vw, 58px);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.5px;
    margin-bottom: 20px;
}

.hero h1 .hero-hl {
    color: var(--accent);
    position: relative;
}

.hero p {
    font-size: 17px;
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.86);
    max-width: 580px;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-data {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    padding-top: 28px;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-data-item {
    text-align: left;
}

.hero-data-num {
    display: block;
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
}

.hero-data-num em {
    font-style: normal;
    color: var(--accent);
    font-size: 20px;
    margin-left: 2px;
}

.hero-data-label {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.66);
    margin-top: 4px;
}

/* ========== 板块通用 ========== */
.section {
    padding: 90px 0;
}

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

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

.section-head .badge {
    margin-bottom: 18px;
}

.section-head h2 {
    font-size: clamp(28px, 3.4vw, 40px);
    font-weight: 800;
    line-height: 1.3;
    color: var(--dark);
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}

.section-head p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ========== 核心特色 ========== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 38px 26px;
    text-align: center;
    transition: 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(--primary), var(--accent));
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: rgba(255, 107, 43, 0.24);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 68px;
    height: 68px;
    margin: 0 auto 22px;
    background: var(--primary-light);
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--primary);
    transform: scale(1.06) rotate(-4deg);
    box-shadow: 0 10px 24px rgba(255, 107, 43, 0.3);
}

.feature-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}

.feature-card p {
    font-size: 14px;
    line-height: 1.75;
    color: var(--text-light);
}

/* ========== 数据统计 ========== */
.stats-section {
    position: relative;
    background: var(--dark);
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 90px 0;
}

.stats-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(15, 18, 32, 0.82);
}

.stats-section .container {
    position: relative;
    z-index: 1;
}

.stats-head {
    text-align: center;
    margin-bottom: 52px;
}

.stats-head h2 {
    color: #fff;
    font-size: clamp(28px, 3.4vw, 40px);
    font-weight: 800;
    margin-bottom: 12px;
}

.stats-head p {
    color: rgba(255, 255, 255, 0.66);
    font-size: 16px;
}

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

.stat-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    padding: 36px 20px;
    backdrop-filter: blur(4px);
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: translateY(-4px);
}

.stat-num {
    font-size: 42px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.76);
    letter-spacing: 1px;
}

/* ========== 分类入口 ========== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.category-card {
    position: relative;
    border-radius: 22px;
    overflow: hidden;
    min-height: 320px;
    display: flex;
    align-items: flex-end;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: none;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.category-card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.category-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(20, 24, 38, 0) 40%, rgba(20, 24, 38, 0.82) 100%);
    z-index: 1;
}

.category-info {
    position: relative;
    z-index: 2;
    padding: 34px 32px;
    color: #fff;
    width: 100%;
}

.category-info h3 {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 8px;
}

.category-info p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.82);
    max-width: 400px;
    margin-bottom: 20px;
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--white);
    color: var(--dark);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
    transition: var(--transition);
}

.category-link:hover {
    background: var(--primary);
    color: #fff;
    gap: 14px;
    box-shadow: 0 10px 24px rgba(255, 107, 43, 0.4);
}

/* ========== 最新资讯列表 ========== */
.news-section {
    background: var(--white);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.news-item {
    display: flex;
    gap: 24px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px;
    transition: var(--transition);
}

.news-item:hover {
    box-shadow: var(--shadow);
    transform: translateY(-3px);
    border-color: rgba(255, 107, 43, 0.22);
}

.news-thumb {
    flex: 0 0 220px;
    height: 160px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}

.news-item:hover .news-thumb img {
    transform: scale(1.06);
}

.news-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.news-badge {
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.news-date {
    font-size: 13px;
    color: var(--text-light);
}

.news-title {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-title a {
    color: var(--dark);
}

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

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

.news-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
}

.news-more:hover {
    gap: 12px;
    color: var(--primary-dark);
}

.news-empty {
    text-align: center;
    padding: 70px 20px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    color: var(--text-light);
    font-size: 16px;
}

/* ========== 使用流程 ========== */
.process-section {
    background: var(--bg);
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.process-step {
    position: relative;
    text-align: center;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 42px 24px 34px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.step-line {
    position: absolute;
    top: 48px;
    left: calc(50% + 44px);
    width: calc(100% - 88px);
    height: 2px;
    background: repeating-linear-gradient(90deg, var(--primary-light) 0 6px, transparent 6px 12px);
    z-index: 0;
}

.step-num {
    width: 76px;
    height: 76px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 10px 26px rgba(255, 107, 43, 0.3);
    position: relative;
    z-index: 1;
}

.process-step h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.process-step p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========== FAQ ========== */
.faq-section {
    background: var(--white);
}

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

.faq-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item[open] {
    background: var(--white);
    border-color: rgba(255, 107, 43, 0.3);
    box-shadow: var(--shadow-sm);
}

.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    list-style: none;
    user-select: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    font-size: 24px;
    font-weight: 400;
    color: var(--primary);
    flex-shrink: 0;
    transition: var(--transition);
    line-height: 1;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 22px;
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.8;
}

/* ========== CTA ========== */
.cta-section {
    position: relative;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 100px 0;
}

.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255, 107, 43, 0.9), rgba(255, 148, 64, 0.78));
}

.cta-inner {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
    max-width: 700px;
    margin: 0 auto;
}

.cta-inner h2 {
    font-size: clamp(28px, 3.4vw, 40px);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
}

.cta-inner p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    margin-bottom: 36px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.btn-light {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.24);
    background: var(--primary-light);
}

.btn-outline-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.8);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.16);
    border-color: #fff;
    transform: translateY(-2px);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding-top: 70px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    margin-bottom: 18px;
}

.footer-brand .logo-name {
    color: #fff;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.9;
    max-width: 380px;
}

.footer h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 18px;
}

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

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.64);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.footer-bottom {
    padding: 22px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
}

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

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .step-line {
        display: none;
    }

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

@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .container {
        width: 94%;
    }

    .hero {
        min-height: 560px;
    }

    .hero-content {
        padding: 60px 0;
    }

    .section {
        padding: 64px 0;
    }

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

    .news-item {
        flex-direction: column;
    }

    .news-thumb {
        flex: 0 0 auto;
        width: 100%;
        height: 190px;
    }

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

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

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

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

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

    .hero h1 {
        font-size: 32px;
    }

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

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

    .hero-data {
        flex-direction: column;
        gap: 16px;
    }

    .section-head {
        margin-bottom: 36px;
    }

    .cta-section {
        padding: 70px 0;
    }

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

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

    .footer-bottom {
        font-size: 12px;
    }
}

/* roulang page: category1 */
:root {
            --primary: #4F6EF7;
            --primary-dark: #3A54D6;
            --primary-light: #6C86FF;
            --primary-bg: #EEF2FF;
            --accent: #FF7A45;
            --accent-light: #FFF4ED;
            --secondary: #22C55E;
            --bg: #FFFFFF;
            --bg-light: #F7F8FC;
            --bg-dark: #0B1220;
            --text: #1E293B;
            --text-light: #64748B;
            --text-lighter: #94A3B8;
            --border: #E6E9F2;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 10px rgba(30, 41, 59, .06);
            --shadow-md: 0 6px 24px rgba(30, 41, 59, .08);
            --shadow-lg: 0 16px 40px rgba(79, 110, 247, .12);
            --space-section: 96px;
            --container: 1200px;
            --transition: all .3s ease;
        }

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

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

        body {
            font-family: 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input,
        textarea {
            font-family: inherit;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 15px;
            outline: none;
            transition: var(--transition);
            width: 100%;
        }

        input:focus,
        textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79, 110, 247, .15);
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== Header ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 10px rgba(30, 41, 59, .03);
        }

        .header-inner {
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

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

        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: white;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 900;
            box-shadow: 0 4px 14px rgba(79, 110, 247, .35);
        }

        .logo-name {
            font-size: 18px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: .3px;
        }

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

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            padding: 8px 4px;
            position: relative;
            white-space: nowrap;
        }

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

        .nav-link:hover,
        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after,
        .nav-link:hover::after {
            transform: scaleX(1);
        }

        .nav-cta {
            background: var(--primary);
            color: white !important;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: 50px;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(79, 110, 247, .3);
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 110, 247, .4);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: var(--bg-light);
            border-radius: 8px;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        .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);
        }

        .mobile-menu {
            display: none;
            background: white;
            border-top: 1px solid var(--border);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu .nav-link {
            padding: 12px 8px;
            border-radius: 8px;
        }

        .mobile-menu .nav-link:hover {
            background: var(--primary-bg);
        }

        .mobile-menu .nav-cta {
            margin-top: 12px;
            display: inline-block;
            text-align: center;
        }

        /* ===== Banner ===== */
        .page-banner {
            position: relative;
            padding: 90px 0 100px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #111A30 55%, #1D2A4D 100%);
            color: white;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 55%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: .25;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(79, 110, 247, .35) 0%, transparent 70%);
            border-radius: 50%;
        }

        .banner-inner {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(79, 110, 247, .2);
            border: 1px solid rgba(79, 110, 247, .4);
            color: #A5B8FF;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 20px;
        }

        .page-banner h1 {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .page-banner .banner-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, .75);
            line-height: 1.8;
            max-width: 680px;
            margin-bottom: 28px;
        }

        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            background: rgba(255, 255, 255, .08);
            border-radius: 30px;
            padding: 8px 18px;
        }

        /* ===== 分类导航小横条 ===== */
        .cat-tabs {
            background: white;
            border-bottom: 1px solid var(--border);
            padding: 20px 0;
            position: sticky;
            top: 76px;
            z-index: 99;
            box-shadow: 0 2px 10px rgba(30, 41, 59, .02);
        }

        .cat-tabs-inner {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .cat-tab {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            background: var(--bg-light);
            border: 1px solid var(--border);
            padding: 8px 20px;
            border-radius: 50px;
            transition: var(--transition);
        }

        .cat-tab:hover,
        .cat-tab.active {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
            box-shadow: 0 4px 14px rgba(79, 110, 247, .3);
        }

        /* ===== 精选分享 ===== */
        .featured-section {
            padding: var(--space-section) 0;
            background: var(--bg);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 44px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
        }

        .section-head p {
            color: var(--text-light);
            font-size: 16px;
            margin-top: 8px;
            max-width: 720px;
        }

        .featured-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 28px;
        }

        .featured-main {
            background: var(--bg-light);
            border-radius: var(--radius-xl);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .featured-main:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .featured-img {
            height: 280px;
            overflow: hidden;
        }

        .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .featured-main:hover .featured-img img {
            transform: scale(1.05);
        }

        .featured-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-body .badge {
            align-self: flex-start;
            background: linear-gradient(135deg, var(--accent), #FF9A5F);
            color: white;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
        }

        .featured-body h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .featured-body p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 20px;
            flex: 1;
        }

        .featured-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        .user-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
            color: white;
        }

        .user-name {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
        }

        .user-date {
            font-size: 12px;
            color: var(--text-lighter);
        }

        .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .read-more i {
            transition: var(--transition);
        }

        .read-more:hover i {
            transform: translateX(4px);
        }

        .featured-side {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .side-card {
            background: white;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            display: flex;
            gap: 18px;
            transition: var(--transition);
        }

        .side-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }

        .side-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .side-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .side-card p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.7;
        }

        .side-card .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 10px;
        }

        .side-card .tag-row span {
            font-size: 11px;
            background: var(--bg-light);
            color: var(--text-light);
            padding: 3px 10px;
            border-radius: 20px;
        }

        /* ===== 图片卡片列表 ===== */
        .articles-section {
            padding: 0 0 var(--space-section);
            background: var(--bg);
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .article-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: transparent;
        }

        .article-cover {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .article-card:hover .article-cover img {
            transform: scale(1.06);
        }

        .article-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255, 255, 255, .95);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 30px;
            box-shadow: 0 4px 14px rgba(0, 0, 0, .1);
        }

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

        .article-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            transition: var(--transition);
        }

        .article-card:hover .article-body h3 {
            color: var(--primary);
        }

        .article-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-lighter);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .article-meta i {
            margin-right: 5px;
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
        }

        .stats-inner {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .stat-item h3 {
            font-size: 40px;
            font-weight: 900;
            margin-bottom: 4px;
            letter-spacing: 1px;
        }

        .stat-item p {
            font-size: 14px;
            opacity: .85;
        }

        /* ===== 心得技巧 ===== */
        .tips-section {
            padding: var(--space-section) 0;
            background: var(--bg-light);
        }

        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .tip-card {
            background: white;
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
        }

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

        .tip-number {
            font-size: 42px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            display: block;
            margin-bottom: 16px;
        }

        .tip-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .tip-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
        }

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

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            gap: 16px;
        }

        .faq-q i {
            color: var(--primary);
            font-size: 16px;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-a-inner {
            padding: 0 24px 20px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: .15;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            color: white;
        }

        .cta-inner h2 {
            font-size: 36px;
            font-weight: 900;
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: white;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 8px 24px rgba(79, 110, 247, .4);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(79, 110, 247, .5);
        }

        .btn-outline-light {
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .3);
            color: white;
            font-size: 15px;
            font-weight: 500;
            padding: 14px 36px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .2);
            border-color: white;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, .7);
            padding: 70px 0 0;
        }

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

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

        .footer-brand .logo-icon {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
        }

        .footer-brand .logo-name {
            color: white;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 340px;
        }

        .footer h4 {
            color: white;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links a:hover {
            color: white;
            padding-left: 6px;
        }

        .footer-bottom {
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .6);
        }

        .footer-bottom a:hover {
            color: white;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .featured-grid {
                grid-template-columns: 1fr;
            }

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

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

            .stats-inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }

            .nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu.active {
                display: flex;
            }

            .page-banner h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 64px;
            }

            .container {
                padding: 0 20px;
            }

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

            .page-banner {
                padding: 60px 0 70px;
            }

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

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-bottom: 32px;
            }

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

            .featured-img {
                height: 220px;
            }

            .featured-body {
                padding: 20px;
            }

            .featured-body h3 {
                font-size: 19px;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .cta-btns {
                flex-direction: column;
            }

            .btn-primary,
            .btn-outline-light {
                justify-content: center;
            }

            .cat-tabs {
                top: auto;
                position: relative;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                height: 64px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

            .logo-name {
                font-size: 16px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

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

            .banner-meta {
                flex-direction: column;
                gap: 8px;
            }

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

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

            .stats-inner {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .stat-item h3 {
                font-size: 30px;
            }

            .featured-img {
                height: 190px;
            }

            .side-card {
                flex-direction: row;
                flex-wrap: wrap;
            }

            .faq-q {
                font-size: 14px;
                padding: 16px;
            }

            .footer-top {
                gap: 24px;
            }

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

/* roulang page: article */
:root {
        --primary: #2563eb;
        --primary-dark: #1e40af;
        --primary-light: #eff6ff;
        --accent: #f97316;
        --accent-dark: #ea580c;
        --accent-light: #fff7ed;
        --bg: #f8fafc;
        --card: #ffffff;
        --text: #1e293b;
        --text-weak: #64748b;
        --border: #e2e8f0;
        --radius: 16px;
        --radius-sm: 10px;
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
        --shadow: 0 4px 20px rgba(0,0,0,0.08);
        --shadow-lg: 0 16px 48px rgba(37,99,235,0.12);
        --transition: all 0.3s ease;
        --container: 1200px;
    }
    * { 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", "Helvetica Neue", Arial, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-dark); }
    img { max-width: 100%; display: block; }
    ul, ol { list-style: none; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; }
    .container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

    /* ========== Header ========== */
    .header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 2px 12px rgba(15,23,42,0.04);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .logo-icon {
        width: 38px;
        height: 38px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        font-size: 18px;
        font-weight: 800;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 12px rgba(37,99,235,0.25);
    }
    .logo-text { display: flex; flex-direction: column; }
    .logo-name {
        font-size: 18px;
        font-weight: 800;
        color: var(--text);
        letter-spacing: 0.5px;
        white-space: nowrap;
    }
    .nav-desktop {
        display: flex;
        align-items: center;
        gap: 32px;
    }
    .nav-link {
        font-size: 15px;
        font-weight: 500;
        color: var(--text);
        padding: 8px 2px;
        position: relative;
        white-space: nowrap;
    }
    .nav-link::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 0;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
        transition: var(--transition);
    }
    .nav-link:hover { color: var(--primary); }
    .nav-link:hover::after,
    .nav-link.active::after { width: 100%; }
    .nav-link.active { color: var(--primary); font-weight: 600; }
    .nav-cta {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 9px 22px;
        border-radius: 50px;
        background: var(--accent);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        box-shadow: 0 4px 14px rgba(249,115,22,0.3);
        transition: var(--transition);
        white-space: nowrap;
    }
    .nav-cta:hover {
        background: var(--accent-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(249,115,22,0.4);
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 42px;
        height: 42px;
        padding: 8px;
        border-radius: 10px;
        background: var(--bg);
        transition: var(--transition);
    }
    .nav-toggle:hover { background: var(--border); }
    .nav-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
        transition: var(--transition);
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
    .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .mobile-menu {
        display: none;
        flex-direction: column;
        padding: 12px 24px 20px;
        background: #fff;
        border-top: 1px solid var(--border);
        gap: 4px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu .nav-link,
    .mobile-menu .nav-cta {
        padding: 12px 14px;
        border-radius: 10px;
        font-size: 15px;
    }
    .mobile-menu .nav-link:hover,
    .mobile-menu .nav-link.active { background: var(--primary-light); }
    .mobile-menu .nav-cta { margin-top: 8px; text-align: center; }

    /* ========== 文章 Hero ========== */
    .article-hero {
        position: relative;
        padding: 72px 0 56px;
        background: linear-gradient(135deg, rgba(30,64,175,0.94), rgba(37,99,235,0.86)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        color: #fff;
    }
    .article-hero-inner { max-width: 860px; }
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 13px;
        color: rgba(255,255,255,0.8);
        margin-bottom: 24px;
    }
    .breadcrumb a { color: rgba(255,255,255,0.85); }
    .breadcrumb a:hover { color: #fff; text-decoration: underline; }
    .breadcrumb .sep { opacity: 0.5; }
    .article-category-badge {
        display: inline-block;
        padding: 6px 16px;
        border-radius: 50px;
        background: rgba(255,255,255,0.18);
        color: #fff;
        font-size: 13px;
        font-weight: 600;
        backdrop-filter: blur(4px);
        margin-bottom: 16px;
        border: 1px solid rgba(255,255,255,0.25);
    }
    .article-title {
        font-size: 34px;
        font-weight: 800;
        line-height: 1.35;
        margin-bottom: 18px;
        letter-spacing: 0.5px;
    }
    .article-meta-row {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 20px;
        font-size: 14px;
        color: rgba(255,255,255,0.75);
    }
    .article-meta-row span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    /* ========== 文章正文 ========== */
    .article-section { padding: 56px 0 0; }
    .article-container { max-width: 860px; }
    .article-card {
        background: var(--card);
        border-radius: 24px;
        box-shadow: var(--shadow);
        overflow: hidden;
        border: 1px solid rgba(226,232,240,0.5);
    }
    .article-cover {
        height: 380px;
        overflow: hidden;
        background: var(--primary-light);
        position: relative;
    }
    .article-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .article-card:hover .article-cover img { transform: scale(1.02); }
    .article-body { padding: 44px 48px 36px; }
    .article-body h2 {
        font-size: 26px;
        font-weight: 700;
        color: var(--text);
        margin: 38px 0 14px;
        line-height: 1.4;
        padding-bottom: 10px;
        border-bottom: 1px solid var(--border);
    }
    .article-body h3 {
        font-size: 21px;
        font-weight: 600;
        color: var(--text);
        margin: 30px 0 12px;
        line-height: 1.4;
    }
    .article-body p {
        font-size: 17px;
        line-height: 1.9;
        color: #334155;
        margin-bottom: 20px;
    }
    .article-body ul,
    .article-body ol {
        margin: 0 0 22px 24px;
        color: #334155;
        font-size: 16px;
        line-height: 1.8;
    }
    .article-body ul li {
        position: relative;
        padding-left: 16px;
        margin-bottom: 8px;
    }
    .article-body ul li::before {
        content: "";
        position: absolute;
        left: 0;
        top: 12px;
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--primary);
    }
    .article-body ol li { margin-bottom: 8px; }
    .article-body img {
        border-radius: 14px;
        margin: 26px 0;
        box-shadow: var(--shadow-sm);
    }
    .article-body blockquote {
        border-left: 4px solid var(--primary);
        background: var(--primary-light);
        padding: 18px 22px;
        border-radius: 0 12px 12px 0;
        margin: 26px 0;
        font-size: 16px;
        color: #1e40af;
        line-height: 1.7;
    }
    .article-body a { font-weight: 500; text-decoration: underline; }
    .article-body a:hover { color: var(--accent); }
    .article-body table {
        width: 100%;
        border-collapse: collapse;
        margin: 24px 0;
        font-size: 15px;
    }
    .article-body table th,
    .article-body table td {
        border: 1px solid var(--border);
        padding: 12px 16px;
        text-align: left;
    }
    .article-body table th { background: var(--primary-light); font-weight: 600; }

    .article-footer-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 16px;
        padding: 20px 48px 36px;
        border-top: 1px solid var(--border);
        margin: 0 48px;
        border-bottom: none;
    }
    .article-tags {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
    }
    .article-tags .tag {
        display: inline-block;
        padding: 5px 14px;
        border-radius: 50px;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 13px;
        font-weight: 500;
        transition: var(--transition);
    }
    .article-tags .tag:hover { background: var(--primary); color: #fff; }

    /* ========== 未找到 ========== */
    .not-found {
        padding: 80px 48px;
        text-align: center;
    }
    .not-found-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 72px;
        height: 72px;
        border-radius: 50%;
        background: var(--accent-light);
        color: var(--accent);
        font-size: 34px;
        font-weight: 800;
        margin-bottom: 20px;
    }
    .not-found h2 { font-size: 28px; margin-bottom: 12px; }
    .not-found p { color: var(--text-weak); margin-bottom: 24px; font-size: 16px; }

    /* ========== 按钮 ========== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 13px 30px;
        border-radius: 50px;
        font-size: 15px;
        font-weight: 600;
        transition: var(--transition);
        border: none;
        cursor: pointer;
        line-height: 1;
    }
    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 16px rgba(37,99,235,0.3);
    }
    .btn-primary:hover {
        background: var(--primary-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(37,99,235,0.35);
    }
    .btn-outline {
        background: transparent;
        color: var(--primary);
        border: 2px solid var(--primary);
    }
    .btn-outline:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-2px);
    }
    .btn-white {
        background: #fff;
        color: var(--primary-dark);
        box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    }
    .btn-white:hover {
        background: var(--primary-light);
        color: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    }

    /* ========== 相关资讯 ========== */
    .related-section {
        padding: 72px 0 40px;
        background: var(--bg);
    }
    .section-head {
        text-align: center;
        margin-bottom: 44px;
    }
    .section-tag {
        display: inline-block;
        padding: 5px 16px;
        border-radius: 50px;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 14px;
        letter-spacing: 1px;
    }
    .section-head h2 {
        font-size: 32px;
        font-weight: 800;
        color: var(--text);
        letter-spacing: 0.5px;
    }
    .section-head p {
        color: var(--text-weak);
        font-size: 16px;
        margin-top: 10px;
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .related-card {
        background: var(--card);
        border-radius: 18px;
        overflow: hidden;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .related-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: transparent;
    }
    .related-cover {
        height: 180px;
        overflow: hidden;
        position: relative;
    }
    .related-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }
    .related-card:hover .related-cover img { transform: scale(1.06); }
    .related-body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
    .related-cat {
        font-size: 12px;
        color: var(--accent);
        font-weight: 600;
        margin-bottom: 8px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    .related-body h3 {
        font-size: 18px;
        font-weight: 700;
        line-height: 1.5;
        margin-bottom: 10px;
        color: var(--text);
    }
    .related-body h3 a { color: var(--text); }
    .related-body h3 a:hover { color: var(--primary); }
    .related-body p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
        flex: 1;
    }

    /* ========== CTA ========== */
    .cta-section { padding: 56px 0; }
    .cta-card {
        background: linear-gradient(120deg, var(--primary-dark), var(--primary));
        border-radius: 24px;
        padding: 56px 48px;
        text-align: center;
        color: #fff;
        position: relative;
        overflow: hidden;
        box-shadow: var(--shadow-lg);
    }
    .cta-card::before {
        content: "";
        position: absolute;
        top: -80px;
        right: -80px;
        width: 240px;
        height: 240px;
        border-radius: 50%;
        background: rgba(255,255,255,0.08);
    }
    .cta-card::after {
        content: "";
        position: absolute;
        bottom: -60px;
        left: -60px;
        width: 180px;
        height: 180px;
        border-radius: 50%;
        background: rgba(255,255,255,0.06);
    }
    .cta-card h2 { font-size: 30px; font-weight: 800; margin-bottom: 14px; position: relative; z-index: 1; }
    .cta-card p { font-size: 16px; opacity: 0.9; margin-bottom: 28px; position: relative; z-index: 1; }

    /* ========== FAQ ========== */
    .faq-section { padding: 56px 0 80px; }
    .faq-wrap { max-width: 800px; margin: 0 auto; }
    .faq-item {
        background: var(--card);
        border-radius: 14px;
        border: 1px solid var(--border);
        margin-bottom: 14px;
        overflow: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-sm);
    }
    .faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow); }
    .faq-item.active { border-color: var(--primary); box-shadow: var(--shadow); }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 20px 24px;
        font-size: 16px;
        font-weight: 600;
        color: var(--text);
        cursor: pointer;
        transition: var(--transition);
        width: 100%;
        text-align: left;
    }
    .faq-question:hover { color: var(--primary); }
    .faq-icon {
        width: 22px;
        height: 22px;
        flex-shrink: 0;
        position: relative;
    }
    .faq-icon::before,
    .faq-icon::after {
        content: "";
        position: absolute;
        background: var(--text-weak);
        border-radius: 2px;
        transition: var(--transition);
    }
    .faq-icon::before { width: 14px; height: 2px; top: 10px; left: 4px; }
    .faq-icon::after { width: 2px; height: 14px; top: 4px; left: 10px; }
    .faq-item.active .faq-icon::after { transform: scaleY(0); }
    .faq-item.active .faq-icon::before { background: var(--primary); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        color: var(--text-weak);
        font-size: 15px;
        line-height: 1.8;
        padding: 0 24px;
    }
    .faq-item.active .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    /* ========== Footer ========== */
    .footer {
        background: #0f172a;
        color: #94a3b8;
        padding: 64px 0 28px;
    }
    .footer-top {
        display: grid;
        grid-template-columns: 1.4fr 0.8fr 0.8fr;
        gap: 48px;
        margin-bottom: 44px;
    }
    .footer .logo-name { color: #fff; }
    .footer-desc { font-size: 14px; line-height: 1.8; margin-top: 16px; max-width: 360px; color: #94a3b8; }
    .footer h4 {
        color: #fff;
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 18px;
        letter-spacing: 0.5px;
    }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a { color: #94a3b8; font-size: 14px; transition: var(--transition); }
    .footer-links a:hover { color: var(--accent); padding-left: 4px; }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding-top: 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 13px;
        color: #64748b;
    }
    .footer-bottom a { color: #94a3b8; }
    .footer-bottom a:hover { color: #fff; }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
        .nav-desktop { gap: 20px; }
        .article-title { font-size: 30px; }
        .related-grid { gap: 20px; }
        .article-cover { height: 320px; }
    }
    @media (max-width: 768px) {
        .nav-desktop { display: none; }
        .nav-toggle { display: flex; }
        .mobile-menu { display: none; }
        .mobile-menu.open { display: flex; }
        .article-hero { padding: 48px 0 40px; }
        .article-title { font-size: 26px; }
        .article-body { padding: 28px 24px 24px; }
        .article-footer-meta { padding: 16px 24px 24px; margin: 0 24px; }
        .related-grid { grid-template-columns: 1fr; }
        .cta-card { padding: 40px 28px; }
        .cta-card h2 { font-size: 24px; }
        .footer-top { grid-template-columns: 1fr; gap: 32px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .section-head h2 { font-size: 26px; }
        .article-cover { height: 240px; }
        .breadcrumb { font-size: 12px; }
        .article-meta-row { gap: 12px; font-size: 13px; }
    }
    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .logo-name { font-size: 16px; }
        .article-hero { padding: 36px 0 32px; }
        .article-title { font-size: 22px; }
        .article-body { padding: 24px 18px 20px; }
        .article-body h2 { font-size: 20px; }
        .article-body p { font-size: 15px; }
        .article-footer-meta { padding: 14px 18px 20px; margin: 0 18px; flex-direction: column; align-items: flex-start; }
        .related-section { padding: 52px 0 32px; }
        .related-cover { height: 160px; }
        .cta-section { padding: 40px 0; }
        .cta-card { padding: 32px 20px; }
        .faq-question { font-size: 15px; padding: 16px 18px; }
        .faq-item.active .faq-answer { padding: 0 18px 16px; }
        .not-found { padding: 56px 20px; }
        .not-found h2 { font-size: 22px; }
    }

    /* ========== Focus 可访问性 ========== */
    a:focus-visible,
    button:focus-visible {
        outline: 3px solid rgba(37,99,235,0.4);
        outline-offset: 2px;
        border-radius: 4px;
    }

/* roulang page: category2 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --spacing: 80px;
  --transition: all 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; line-height: 1.7; color: var(--text); background: var(--bg); }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: var(--spacing) 0; }

/* Header & Nav */
.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 40px; height: 40px; border-radius: 10px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; }
.logo-text { display: flex; flex-direction: column; }
.logo-name { font-size: 18px; font-weight: 700; color: var(--text); letter-spacing: 0.5px; }
.nav-desktop { display: flex; align-items: center; gap: 8px; }
.nav-desktop .nav-link { padding: 8px 16px; border-radius: 8px; font-size: 15px; font-weight: 500; color: var(--text); }
.nav-desktop .nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-desktop .nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-desktop .nav-cta { padding: 9px 20px; border-radius: 8px; background: var(--primary); color: #fff; font-size: 14px; font-weight: 500; }
.nav-desktop .nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 42px; height: 42px; background: none; border: 1px solid var(--border); border-radius: 8px; padding: 10px; }
.nav-toggle span { height: 2px; width: 100%; background: var(--text); border-radius: 2px; transition: var(--transition); }
.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); }
.mobile-menu { display: none; flex-direction: column; padding: 16px 24px 24px; background: #fff; border-bottom: 1px solid var(--border); gap: 6px; }
.mobile-menu a { padding: 12px 16px; border-radius: 8px; font-size: 15px; font-weight: 500; color: var(--text); }
.mobile-menu a:hover { background: var(--primary-light); color: var(--primary); }
.mobile-menu a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.mobile-menu .nav-cta { background: var(--primary); color: #fff; text-align: center; margin-top: 6px; }
.mobile-menu .nav-cta:hover { background: var(--primary-dark); }
.mobile-menu.open { display: flex; }

/* Page Banner */
.page-banner { position: relative; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; padding: 100px 0 90px; color: #fff; isolation: isolate; }
.page-banner::before { content: ''; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(15,23,42,0.88), rgba(37,99,235,0.72) 60%, rgba(15,23,42,0.55)); z-index: -1; }
.page-banner .banner-inner { max-width: 760px; }
.page-banner .banner-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.16); border: 1px solid rgba(255,255,255,0.24); padding: 6px 16px; border-radius: 100px; font-size: 13px; font-weight: 500; margin-bottom: 20px; backdrop-filter: blur(4px); }
.page-banner h1 { font-size: 42px; font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
.page-banner p { font-size: 17px; opacity: 0.92; max-width: 640px; }
.banner-breadcrumb { display: flex; gap: 8px; font-size: 13px; opacity: 0.85; margin-bottom: 18px; }
.banner-breadcrumb a { color: rgba(255,255,255,0.9); }
.banner-breadcrumb a:hover { color: #fff; text-decoration: underline; }
.banner-breadcrumb i { font-size: 11px; align-self: center; }

/* Feature Strip */
.feature-strip { background: var(--bg-white); border-bottom: 1px solid var(--border); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; padding: 28px 0; }
.feature-item { display: flex; align-items: center; gap: 16px; padding: 16px 24px; border-right: 1px solid var(--border); }
.feature-item:last-child { border-right: none; }
.feature-item .feature-icon { width: 48px; height: 48px; flex-shrink: 0; border-radius: 12px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 20px; }
.feature-item h3 { font-size: 15px; font-weight: 600; margin-bottom: 2px; }
.feature-item p { font-size: 13px; color: var(--text-weak); }

/* Section Header */
.section-header { text-align: center; margin-bottom: 48px; }
.section-header .section-tag { display: inline-flex; align-items: center; gap: 6px; background: var(--primary-light); color: var(--primary); padding: 6px 16px; border-radius: 100px; font-size: 13px; font-weight: 600; margin-bottom: 14px; }
.section-header h2 { font-size: 32px; font-weight: 800; color: var(--text); margin-bottom: 12px; letter-spacing: -0.5px; }
.section-header p { color: var(--text-weak); font-size: 15px; max-width: 620px; margin: 0 auto; }

/* Category Lead */
.category-lead { background: var(--bg-white); }
.lead-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.lead-content .lead-title { font-size: 26px; font-weight: 700; margin-bottom: 20px; line-height: 1.4; }
.lead-content .lead-title span { color: var(--primary); }
.lead-content p { color: var(--text-weak); margin-bottom: 16px; font-size: 15px; }
.lead-list { margin-top: 20px; }
.lead-list li { display: flex; align-items: flex-start; gap: 12px; padding: 10px 0; font-size: 15px; }
.lead-list li i { color: var(--primary); margin-top: 5px; font-size: 14px; }
.lead-list li strong { color: var(--text); }
.lead-image { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.lead-image img { width: 100%; height: 320px; object-fit: cover; }

/* Experience Cards */
.experience-cards { background: var(--bg); }
.cards-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.exp-card { background: var(--bg-white); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); transition: var(--transition); }
.exp-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.exp-card-image { position: relative; height: 210px; overflow: hidden; }
.exp-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.exp-card:hover .exp-card-image img { transform: scale(1.05); }
.exp-card-tag { position: absolute; top: 14px; left: 14px; background: rgba(255,255,255,0.94); color: var(--primary); font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 100px; box-shadow: 0 2px 8px rgba(0,0,0,0.12); }
.exp-card-body { padding: 24px; }
.exp-card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.exp-card-body h3 a { color: var(--text); }
.exp-card-body h3 a:hover { color: var(--primary); }
.exp-card-body p { color: var(--text-weak); font-size: 14px; margin-bottom: 16px; }
.exp-card-meta { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--border); padding-top: 16px; font-size: 13px; color: var(--text-weak); }
.exp-card-meta .meta-user i { margin-right: 5px; color: var(--primary); }
.exp-card-meta .meta-read { color: var(--primary); font-weight: 500; }

/* Stats Section */
.stats-section { background: url('/assets/images/backpic/back-1.png') center/cover no-repeat fixed; position: relative; isolation: isolate; padding: 80px 0; }
.stats-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(130deg, rgba(15,23,42,0.92), rgba(37,99,235,0.8)); z-index: -1; }
.stats-section .section-header h2 { color: #fff; }
.stats-section .section-header p { color: rgba(255,255,255,0.8); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 20px; }
.stat-box { background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.18); backdrop-filter: blur(6px); border-radius: var(--radius); padding: 32px 20px; text-align: center; transition: var(--transition); }
.stat-box:hover { background: rgba(255,255,255,0.18); transform: translateY(-4px); }
.stat-box .stat-number { font-size: 38px; font-weight: 800; color: #fff; margin-bottom: 8px; }
.stat-box .stat-label { font-size: 14px; color: rgba(255,255,255,0.85); }

/* Flow / Techniques */
.flow-section { background: var(--bg-white); }
.flow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.flow-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; transition: var(--transition); position: relative; overflow: hidden; }
.flow-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.flow-card .flow-step { position: absolute; top: 20px; right: 24px; font-size: 48px; font-weight: 800; color: var(--primary-light); line-height: 1; }
.flow-card .flow-icon { width: 52px; height: 52px; border-radius: 14px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 20px; }
.flow-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.flow-card p { font-size: 14px; color: var(--text-weak); }

/* Tips List Section */
.tips-section { background: var(--bg); }
.tips-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.tips-content h2 { font-size: 28px; font-weight: 800; margin-bottom: 16px; line-height: 1.4; }
.tips-content > p { color: var(--text-weak); margin-bottom: 28px; font-size: 15px; }
.tips-list li { display: flex; align-items: flex-start; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.tips-list li:last-child { border-bottom: none; }
.tips-list .tip-num { width: 32px; height: 32px; flex-shrink: 0; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; }
.tips-list .tip-num.accent { background: var(--accent); }
.tips-list .tip-text h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.tips-list .tip-text p { font-size: 14px; color: var(--text-weak); }
.tips-image { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); position: sticky; top: 100px; }
.tips-image img { width: 100%; height: 380px; object-fit: cover; }

/* FAQ */
.faq-section { background: var(--bg-white); }
.faq-grid { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; transition: var(--transition); background: var(--bg); }
.faq-item summary { padding: 20px 24px; font-size: 15px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 13px; color: var(--primary); transition: var(--transition); flex-shrink: 0; }
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item .faq-answer { padding: 0 24px 20px; color: var(--text-weak); font-size: 14px; }
.faq-item[open] { box-shadow: var(--shadow); }

/* CTA */
.cta-section { background: url('/assets/images/backpic/back-3.png') center/cover no-repeat; position: relative; isolation: isolate; padding: 72px 0; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(37,99,235,0.94), rgba(15,23,42,0.88)); z-index: -1; }
.cta-inner { text-align: center; max-width: 640px; margin: 0 auto; color: #fff; }
.cta-inner h2 { font-size: 30px; font-weight: 800; margin-bottom: 14px; }
.cta-inner p { font-size: 15px; color: rgba(255,255,255,0.88); margin-bottom: 28px; }
.cta-buttons { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-size: 15px; font-weight: 600; transition: var(--transition); border: none; }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
.btn-outline { border: 2px solid rgba(255,255,255,0.8); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255,255,255,0.15); transform: translateY(-2px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.3); }

/* Footer */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 64px 0 0; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.12); }
.footer-brand .logo .logo-name { color: #fff; }
.footer-brand .logo .logo-icon { background: rgba(255,255,255,0.12); color: #fff; }
.footer-desc { margin-top: 16px; font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.62); max-width: 360px; }
.footer h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.62); }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 22px 0; font-size: 13px; color: rgba(255,255,255,0.5); flex-wrap: wrap; gap: 10px; }
.footer-bottom a { color: rgba(255,255,255,0.7); }
.footer-bottom a:hover { color: #fff; }

/* Back to top */
.back-top { position: fixed; bottom: 32px; right: 32px; width: 46px; height: 46px; border-radius: 50%; background: var(--primary); color: #fff; border: none; font-size: 16px; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden; transition: var(--transition); z-index: 99; }
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* Responsive */
@media (max-width: 1024px) {
  :root { --spacing: 60px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .feature-item:nth-child(2) { border-right: none; }
  .feature-item:nth-child(3) { border-top: 1px solid var(--border); }
  .cards-grid { grid-template-columns: 1fr 1fr; }
  .flow-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tips-wrap { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: flex; }
  .page-banner { padding: 70px 0 60px; }
  .page-banner h1 { font-size: 30px; }
  .lead-grid { grid-template-columns: 1fr; gap: 32px; }
  .lead-image img { height: 240px; }
  .cards-grid { grid-template-columns: 1fr; }
  .flow-grid { grid-template-columns: 1fr; }
  .tips-wrap { grid-template-columns: 1fr; }
  .tips-image { position: static; }
  .tips-image img { height: 260px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section-header h2 { font-size: 26px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-box .stat-number { font-size: 30px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-item { border-right: none; border-bottom: 1px solid var(--border); padding: 12px 16px; }
  .feature-item:last-child { border-bottom: none; }
  .page-banner h1 { font-size: 25px; }
  .page-banner p { font-size: 15px; }
  .cards-grid { gap: 20px; }
  .exp-card-image { height: 180px; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat-box { padding: 24px 16px; }
  .cta-inner h2 { font-size: 24px; }
  .back-top { bottom: 20px; right: 20px; }
}