/* roulang page: index */
:root {
  --primary: #5D9BC7;
  --primary-deep: #3E719C;
  --primary-light: #E4F0F8;
  --accent: #C89B6D;
  --ink: #1D2D3C;
  --text: #45566B;
  --muted: #8A9BAE;
  --line: #EAF0F5;
  --bg-alt: #F8FBFD;
  --bg-hero: #F0F7FC;
  --shadow-card: 0 2px 16px rgba(29,45,60,0.06);
  --shadow-hover: 0 10px 32px rgba(29,45,60,0.10);
  --radius-lg: 16px;
  --radius-md: 8px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.75;
  font-size: 15px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}

button {
  cursor: pointer;
  font-family: inherit;
}

input, textarea {
  font-family: inherit;
}

::selection {
  background: var(--primary-light);
  color: var(--primary-deep);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .container { padding-left: 1.5rem; padding-right: 1.5rem; }
}

@media (min-width: 1024px) {
  .container { padding-left: 2rem; padding-right: 2rem; }
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 76px;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--line);
  z-index: 50;
  transition: box-shadow .3s ease;
}
.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(29,45,60,0.06);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo-text {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 0;
  white-space: nowrap;
}
.logo-sub {
  font-size: 11px;
  color: var(--muted);
  display: block;
  line-height: 1.3;
  letter-spacing: 1px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 76px;
  font-size: 15px;
  color: var(--text);
  transition: color .2s;
}
.nav-item:hover {
  color: var(--primary);
}
.nav-item.active {
  color: var(--ink);
  font-weight: 600;
}
.nav-item.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #C9D9E4;
  color: var(--primary-deep);
  background: #fff;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 18px;
  border-radius: 8px;
  transition: border-color .2s, background .2s, color .2s;
  white-space: nowrap;
}
.btn-secondary:hover {
  border-color: var(--primary);
  background: var(--bg-hero);
  color: var(--primary-deep);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  padding: 9px 20px;
  border-radius: 8px;
  transition: background .2s, box-shadow .2s, transform .1s;
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--primary-deep);
  box-shadow: 0 4px 16px rgba(62,113,156,0.25);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: #fff;
  z-index: 100;
  box-shadow: -8px 0 40px rgba(29,45,60,0.12);
  transition: right .35s ease;
  display: flex;
  flex-direction: column;
  padding: 24px 20px;
}
.mobile-menu.open {
  right: 0;
}
.mobile-menu-close {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  background: transparent;
  border: none;
  border-radius: 8px;
  transition: background .2s;
}
.mobile-menu-close:hover {
  background: var(--bg-alt);
  color: var(--ink);
}
.mobile-menu-nav {
  display: flex;
  flex-direction: column;
  margin-top: 16px;
}
.mobile-menu-nav a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 8px;
  font-size: 16px;
  color: var(--text);
  border-bottom: 1px solid var(--line);
  transition: color .2s, background .2s;
}
.mobile-menu-nav a:hover {
  color: var(--primary);
  background: var(--bg-alt);
}
.mobile-menu-nav a.active {
  color: var(--primary-deep);
  font-weight: 600;
}
.mobile-menu-cta {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(29,45,60,0.5);
  backdrop-filter: blur(2px);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
}
.mobile-menu-backdrop.show {
  opacity: 1;
  visibility: visible;
}

/* ===== Hero ===== */
.hero-section {
  background: linear-gradient(135deg, var(--bg-hero) 0%, #EAF3F9 55%, #F6FAFD 100%);
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}
.hero-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(240,247,252,0.97) 0%, rgba(240,247,252,0.88) 45%, rgba(240,247,252,0.75) 100%);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary-deep);
  font-size: 12.5px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.hero-steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
}
.hero-steps span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  box-shadow: 0 1px 4px rgba(29,45,60,0.04);
}
.hero-steps .step-arrow {
  color: var(--primary);
  font-weight: 600;
}

/* ===== 卡片通用 ===== */
.card {
  background: #fff;
  border: 1px solid #EFF4F9;
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  transition: box-shadow .25s ease, transform .25s ease;
}
.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.icon-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary-deep);
  flex-shrink: 0;
}
.icon-badge.accent {
  background: rgba(200,155,109,0.14);
  color: var(--accent);
}
.data-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.1;
  font-feature-settings: "tnum";
}
.data-label {
  font-size: 13px;
  color: var(--muted);
  margin-top: 6px;
}

/* ===== 区块标题 ===== */
.section-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 10px;
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 4px;
}
.section-title {
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}
.section-desc {
  font-size: 15px;
  color: var(--muted);
  margin-top: 10px;
  max-width: 640px;
  line-height: 1.7;
}

/* ===== 解决方案卡片 ===== */
.solution-card {
  background: #fff;
  border: 1px solid #EFF4F9;
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  padding: 28px;
  transition: box-shadow .25s, transform .25s;
}
.solution-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.solution-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.solution-card p {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}
.solution-card .feat-list {
  list-style: none;
  padding: 0;
  margin: 14px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.solution-card .feat-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text);
}
.solution-card .feat-list li::before {
  content: '+';
  color: var(--primary);
  font-weight: 700;
  line-height: 1.4;
}

/* ===== 资讯列表 ===== */
.news-card-large {
  background: #fff;
  border: 1px solid #EFF4F9;
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow .25s, transform .25s;
}
.news-card-large:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.news-item {
  display: block;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  transition: background .2s;
}
.news-item:last-child {
  border-bottom: none;
}
.news-item:hover {
  background: var(--bg-alt);
}
.news-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--primary-deep);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: 999px;
}

/* ===== FAQ 折叠 ===== */
.faq-item {
  background: #fff;
  border: 1px solid #EFF4F9;
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow .2s;
}
.faq-item.open {
  box-shadow: var(--shadow-hover);
}
.faq-q {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  user-select: none;
}
.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}
.faq-arrow {
  margin-left: auto;
  color: var(--muted);
  transition: transform .3s;
  font-size: 18px;
}
.faq-item.open .faq-arrow {
  transform: rotate(45deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
  padding: 0 20px;
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 20px 18px;
}

/* ===== 表单 ===== */
.form-input {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  transition: border-color .2s, box-shadow .2s;
}
.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(93,155,199,0.15);
}
.form-textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink);
  resize: vertical;
  transition: border-color .2s, box-shadow .2s;
}
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(93,155,199,0.15);
}
.form-label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  padding: 56px 0 24px;
}
.footer-brand {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
}
.footer-link {
  display: block;
  font-size: 14px;
  color: var(--text);
  padding: 6px 0;
  transition: color .2s;
}
.footer-link:hover {
  color: var(--primary);
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .site-header {
    height: 60px;
  }
  .nav-list {
    display: none;
  }
  .header-cta {
    display: none;
  }
  .nav-item {
    height: 60px;
  }
}

@media (min-width: 1024px) {
  .hamburger-btn {
    display: none !important;
  }
}

@media (max-width: 639px) {
  .data-number {
    font-size: 36px;
  }
  .solution-card {
    padding: 20px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #5D9BC7;
            --primary-deep: #3E719C;
            --primary-light: #E4F0F8;
            --accent: #C89B6D;
            --ink: #1D2D3C;
            --text: #45566B;
            --muted: #8A9BAE;
            --line: #EAF0F5;
            --bg: #FFFFFF;
            --bg-alt: #F8FBFD;
            --shadow-card: 0 2px 16px rgba(29, 45, 60, 0.06);
            --shadow-hover: 0 10px 32px rgba(29, 45, 60, 0.10);
            --radius-lg: 16px;
            --radius-md: 8px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            font-size: 16px;
            letter-spacing: 0.01em;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

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

        @media (min-width: 640px) {
            .container {
                padding: 0 32px;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 0 48px;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            height: 76px;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(29, 45, 60, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

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

        .brand-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border-radius: 12px;
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

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

        .nav-item {
            font-size: 15px;
            color: var(--text);
            padding: 8px 2px;
            position: relative;
            transition: color .2s;
            font-weight: 400;
        }

        .nav-item:hover {
            color: var(--primary);
        }

        .nav-item.active {
            color: var(--primary-deep);
            font-weight: 600;
        }

        .nav-item.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 8px 18px;
            font-size: 14px;
            color: var(--primary-deep);
            background: white;
            border: 1px solid #C9D9E4;
            border-radius: var(--radius-md);
            transition: all .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-login:hover {
            border-color: var(--primary);
            background: #F0F7FC;
        }

        .btn-primary {
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 500;
            color: white;
            background: var(--primary);
            border-radius: var(--radius-md);
            transition: all .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: none;
        }

        .btn-primary:hover {
            background: var(--primary-deep);
            box-shadow: 0 4px 14px rgba(62, 113, 156, 0.3);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-primary:focus-visible,
        .btn-outline:focus-visible,
        .btn-login:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-outline {
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary-deep);
            background: #fff;
            border: 1px solid #C9D9E4;
            border-radius: var(--radius-md);
            transition: all .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: #F0F7FC;
        }

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border-radius: 8px;
            border: none;
            color: var(--ink);
            font-size: 20px;
            transition: background .2s;
        }

        .menu-toggle:hover {
            background: var(--primary-light);
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 100;
            padding: 24px;
            display: flex;
            flex-direction: column;
            transform: translateX(100%);
            transition: transform .3s ease;
            visibility: hidden;
            opacity: 0;
            transition: transform .3s ease, opacity .3s ease, visibility .3s;
        }

        .mobile-menu.open {
            transform: translateX(0);
            visibility: visible;
            opacity: 1;
        }

        .mobile-menu-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--line);
        }

        .mobile-nav-list {
            display: flex;
            flex-direction: column;
        }

        .mobile-nav-item {
            padding: 14px 8px;
            font-size: 16px;
            color: var(--ink);
            border-bottom: 1px solid var(--line);
            transition: background .2s, color .2s;
            font-weight: 500;
        }

        .mobile-nav-item:hover {
            background: var(--bg-alt);
            color: var(--primary);
        }

        .mobile-nav-item.active {
            color: var(--primary-deep);
            font-weight: 600;
            background: var(--bg-alt);
        }

        .mobile-menu-close {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border: none;
            border-radius: 8px;
            font-size: 18px;
            color: var(--ink);
            transition: background .2s;
        }

        .mobile-menu-close:hover {
            background: #d5e6f2;
        }

        /* ===== Category Hero ===== */
        .cat-hero {
            position: relative;
            min-height: 400px;
            display: flex;
            align-items: center;
            background: #F0F7FC;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
            padding: 140px 0 80px;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 247, 252, 0.88) 60%, rgba(240, 247, 252, 0.75) 100%);
            z-index: 1;
        }

        .cat-hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: var(--primary-light);
            color: var(--primary-deep);
            font-size: 13px;
            font-weight: 500;
            border-radius: 999px;
            margin-bottom: 20px;
        }

        .cat-hero h1 {
            font-size: clamp(1.9rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink);
            margin-bottom: 18px;
        }

        .cat-hero h1 .highlight {
            color: var(--primary-deep);
            position: relative;
        }

        .hero-subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            max-width: 680px;
            margin-bottom: 28px;
        }

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

        /* ===== Guide Intro ===== */
        .guide-intro {
            padding: 80px 0 64px;
        }

        .section-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-deep);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(1.4rem, 2.5vw, 2rem);
            font-weight: 700;
            color: var(--ink);
            line-height: 1.35;
            margin-bottom: 20px;
        }

        .section-desc {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
        }

        .intro-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow .3s;
        }

        .intro-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .intro-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .intro-card-body {
            padding: 28px;
        }

        .intro-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--line);
            font-size: 14px;
            color: var(--text);
        }

        .intro-list li:last-child {
            border-bottom: none;
        }

        .intro-list li i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 14px;
        }

        /* ===== Points ===== */
        .guide-points {
            background: var(--bg-alt);
            padding: 80px 0;
        }

        .points-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
            margin-top: 40px;
        }

        @media (min-width: 768px) {
            .points-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        .point-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: box-shadow .25s, transform .25s;
            display: flex;
            gap: 16px;
        }

        .point-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .point-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .point-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .point-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text);
            margin: 0;
        }

        /* ===== FAQ ===== */
        .guide-faq {
            padding: 80px 0;
        }

        .faq-wrap {
            max-width: 800px;
            margin: 40px auto 0;
        }

        .faq-item {
            border: 1px solid var(--line);
            border-radius: 14px;
            background: #fff;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: 0 1px 4px rgba(29, 45, 60, 0.03);
            transition: box-shadow .3s;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }

        .faq-item.open {
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: transparent;
            border: none;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink);
            cursor: pointer;
            transition: background .2s;
        }

        .faq-question:hover {
            background: var(--bg-alt);
        }

        .faq-q-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary-deep);
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .faq-toggle {
            margin-left: auto;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-alt);
            color: var(--primary-deep);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 400;
            transition: transform .3s, background .3s;
            flex-shrink: 0;
        }

        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            background: var(--primary-light);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-answer-inner {
            padding: 0 22px 20px 60px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text);
        }

        /* ===== CTA ===== */
        .guide-cta {
            padding: 64px 0 80px;
            background: linear-gradient(180deg, #F8FBFD 0%, #FFFFFF 100%);
        }

        .cta-card {
            background: var(--primary-light);
            border-radius: 20px;
            padding: 48px;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            right: -40px;
            top: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.35);
        }

        .cta-text {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 260px;
        }

        .cta-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }

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

        .cta-actions {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
            align-items: flex-start;
        }

        .privacy-note {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
        }

        .privacy-note i {
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--line);
            padding-top: 64px;
            padding-bottom: 28px;
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
        }

        .footer-link {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text);
            transition: color .2s;
        }

        .footer-link:hover {
            color: var(--primary);
        }

        /* ===== Modal ===== */
        .modal-backdrop {
            position: fixed;
            inset: 0;
            z-index: 200;
            background: rgba(29, 45, 60, 0.5);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            display: none;
            align-items: center;
            justify-content: center;
            padding: 16px;
        }

        .modal-backdrop.active {
            display: flex;
        }

        .modal-container {
            background: #fff;
            border-radius: 20px;
            width: 480px;
            max-width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            padding: 40px;
            position: relative;
            box-shadow: 0 24px 64px rgba(29, 45, 60, 0.18);
        }

        .modal-close {
            position: absolute;
            top: 12px;
            right: 12px;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-alt);
            border: none;
            border-radius: 10px;
            font-size: 18px;
            color: var(--text);
            transition: background .2s;
        }

        .modal-close:hover {
            background: var(--primary-light);
        }

        .modal-container h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .modal-container .modal-sub {
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            height: 44px;
            background: var(--bg-alt);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 0 14px;
            font-size: 14px;
            font-family: inherit;
            color: var(--ink);
            outline: none;
            transition: border-color .2s, box-shadow .2s;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(93, 155, 199, 0.15);
        }

        .form-group textarea {
            height: auto;
            min-height: 96px;
            padding: 12px 14px;
            resize: vertical;
            line-height: 1.6;
        }

        .btn-submit {
            width: 100%;
            padding: 13px;
            background: var(--primary);
            color: white;
            font-size: 15px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-md);
            transition: all .2s;
            margin-top: 8px;
        }

        .btn-submit:hover {
            background: var(--primary-deep);
            box-shadow: 0 4px 16px rgba(62, 113, 156, 0.3);
        }

        .modal-privacy {
            font-size: 12px;
            color: var(--muted);
            text-align: center;
            margin-top: 16px;
            line-height: 1.6;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-list {
                gap: 20px;
            }
            .header-cta .btn-login {
                display: none;
            }
            .cta-card {
                padding: 36px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 60px;
            }
            .nav-list {
                display: none;
            }
            .header-cta .btn-primary {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .btn-login {
                display: none !important;
            }
            .cat-hero {
                min-height: 340px;
                padding: 100px 0 60px;
            }
            .cat-hero h1 {
                font-size: 1.7rem;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
                padding: 12px;
                font-size: 15px;
            }
            .guide-intro {
                padding: 56px 0 40px;
            }
            .guide-points {
                padding: 56px 0;
            }
            .points-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                margin-top: 28px;
            }
            .point-card {
                padding: 22px;
            }
            .guide-faq {
                padding: 56px 0;
            }
            .faq-question {
                padding: 16px 16px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 16px 18px 52px;
                font-size: 14px;
            }
            .guide-cta {
                padding: 48px 0 56px;
            }
            .cta-card {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-actions {
                width: 100%;
            }
            .cta-actions .btn-primary {
                width: 100%;
                justify-content: center;
                padding: 12px;
            }
            .modal-container {
                padding: 32px 24px;
            }
            .modal-backdrop {
                padding: 12px;
            }
            .modal-container h3 {
                font-size: 20px;
            }
            .site-footer {
                padding-top: 48px;
            }
        }

        @media (max-width: 520px) {
            .cat-hero h1 {
                font-size: 1.5rem;
                line-height: 1.3;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .point-card {
                flex-direction: column;
                gap: 12px;
            }
            .modal-container {
                margin: 0 4px;
            }
            .intro-card-body {
                padding: 20px;
            }
        }

        @media (min-width: 1024px) {
            .header-cta .menu-toggle {
                display: none;
            }
        }

/* roulang page: article */
:root {
            --primary: #5D9BC7;
            --primary-deep: #3E719C;
            --primary-light: #E4F0F8;
            --accent: #C89B6D;
            --ink: #1D2D3C;
            --text: #45566B;
            --muted: #8A9BAE;
            --line: #EAF0F5;
            --bg-alt: #F8FBFD;
            --radius-lg: 16px;
            --radius-md: 8px;
            --shadow-card: 0 2px 16px rgba(29, 45, 60, 0.06);
            --shadow-hover: 0 10px 32px rgba(29, 45, 60, 0.10);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            color: var(--text);
            background: #ffffff;
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 14px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        @media (min-width: 640px) {
            .container {
                padding: 0 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding: 0 2rem;
            }
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--line);
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(29, 45, 60, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            height: 76px;
        }

        @media (max-width: 767px) {
            .header-inner {
                height: 60px;
            }
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        @media (max-width: 1023px) {
            .nav-list {
                display: none;
            }
        }

        .nav-item {
            font-size: 15px;
            color: var(--text);
            font-weight: 400;
            padding: 6px 2px;
            position: relative;
            transition: color 0.2s;
            white-space: nowrap;
        }

        .nav-item:hover {
            color: var(--primary);
        }

        .nav-item.active {
            color: var(--primary-deep);
            font-weight: 600;
        }

        .nav-item.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: var(--primary);
            color: #ffffff;
            font-size: 14px;
            font-weight: 500;
            padding: 12px 22px;
            border-radius: var(--radius-md);
            transition: all 0.2s ease;
            min-height: 44px;
            white-space: nowrap;
            border: 1px solid transparent;
        }

        .btn-primary:hover {
            background: var(--primary-deep);
            box-shadow: 0 4px 16px rgba(62, 113, 156, 0.28);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: #ffffff;
            border: 1px solid #C9D9E4;
            color: var(--primary-deep);
            font-size: 14px;
            font-weight: 500;
            padding: 12px 22px;
            border-radius: var(--radius-md);
            transition: all 0.2s ease;
            min-height: 44px;
            white-space: nowrap;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: #F0F7FC;
        }

        .btn-outline:active {
            transform: scale(0.98);
        }

        .btn-outline:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .mobile-drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(29, 45, 60, 0.4);
            z-index: 1100;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .mobile-drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 100%;
            max-width: 320px;
            height: 100vh;
            background: #ffffff;
            z-index: 1150;
            transition: right 0.3s ease;
            padding: 80px 24px 24px;
            box-shadow: -4px 0 24px rgba(29, 45, 60, 0.12);
            overflow-y: auto;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer-close {
            position: absolute;
            top: 12px;
            right: 12px;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--ink);
            transition: background 0.2s;
        }

        .mobile-drawer-close:hover {
            background: var(--bg-alt);
        }

        .mobile-drawer-link {
            display: flex;
            align-items: center;
            min-height: 48px;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink);
            border-bottom: 1px solid var(--line);
            transition: color 0.2s;
        }

        .mobile-drawer-link:hover {
            color: var(--primary);
        }

        main {
            min-height: 60vh;
        }

        .breadcrumb-wrap {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--line);
            padding: 14px 0;
            margin-top: 76px;
        }

        @media (max-width: 767px) {
            .breadcrumb-wrap {
                margin-top: 60px;
            }
        }

        .breadcrumb-item {
            font-size: 13px;
            color: var(--muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }

        .breadcrumb-item a {
            color: var(--muted);
            transition: color 0.2s;
        }

        .breadcrumb-item a:hover {
            color: var(--primary-deep);
        }

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

        .article-meta .separator {
            color: #C9D9E4;
        }

        .article-prose {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            letter-spacing: 0.01em;
            word-break: break-word;
        }

        .article-prose p {
            margin-bottom: 1.5em;
        }

        .article-prose h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--ink);
            margin: 2em 0 0.8em;
            padding-left: 14px;
            border-left: 3px solid var(--primary);
            line-height: 1.4;
        }

        .article-prose h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--ink);
            margin: 1.8em 0 0.6em;
            line-height: 1.4;
        }

        .article-prose h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            margin: 1.4em 0 0.5em;
            line-height: 1.5;
        }

        .article-prose ul {
            margin: 0 0 1.5em;
            padding-left: 1.5em;
            list-style: disc;
        }

        .article-prose ol {
            margin: 0 0 1.5em;
            padding-left: 1.5em;
            list-style: decimal;
        }

        .article-prose li {
            margin-bottom: 0.5em;
            line-height: 1.75;
        }

        .article-prose li::marker {
            color: var(--primary);
        }

        .article-prose blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 1.5em 0;
            color: var(--ink);
            font-style: normal;
        }

        .article-prose blockquote p {
            margin-bottom: 0;
        }

        .article-prose img {
            border-radius: var(--radius-lg);
            margin: 1.5em 0;
        }

        .article-prose figure {
            margin: 1.5em 0;
        }

        .article-prose figure img {
            margin: 0;
        }

        .article-prose figcaption {
            font-size: 12px;
            color: var(--muted);
            text-align: center;
            margin-top: 10px;
            line-height: 1.5;
        }

        .article-prose table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 1.5em 0;
            font-size: 14px;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--line);
        }

        .article-prose th {
            background: var(--primary-light);
            color: var(--ink);
            font-weight: 600;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--line);
        }

        .article-prose td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--line);
        }

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

        .article-prose tr:nth-child(even) td {
            background: var(--bg-alt);
        }

        .article-prose a {
            color: var(--primary-deep);
            text-decoration: underline;
            text-decoration-color: rgba(62, 113, 156, 0.3);
            text-underline-offset: 3px;
            transition: text-decoration-color 0.2s;
        }

        .article-prose a:hover {
            text-decoration-color: var(--primary);
            color: var(--primary);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            background: var(--primary-light);
            color: var(--primary-deep);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: all 0.2s;
        }

        .badge:hover {
            background: var(--primary);
            color: #ffffff;
        }

        .related-card {
            background: #ffffff;
            border: 1px solid #EFF4F9;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover img {
            transform: scale(1.03);
        }

        .related-card-body {
            padding: 20px;
            flex: 1;
        }

        .site-footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--line);
            padding: 60px 0 24px;
            margin-top: 40px;
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            white-space: nowrap;
        }

        .footer-link {
            display: block;
            font-size: 14px;
            color: var(--text);
            padding: 5px 0;
            transition: color 0.2s;
        }

        .footer-link:hover {
            color: var(--primary-deep);
        }

        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(29, 45, 60, 0.5);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            z-index: 1200;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 16px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .modal-overlay.open {
            opacity: 1;
            visibility: visible;
        }

        .modal-panel {
            background: #ffffff;
            border-radius: var(--radius-lg);
            width: 100%;
            max-width: 480px;
            padding: 32px;
            position: relative;
            transform: translateY(12px);
            transition: transform 0.3s ease;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: 0 20px 60px rgba(29, 45, 60, 0.15);
        }

        .modal-overlay.open .modal-panel {
            transform: translateY(0);
        }

        .modal-close {
            position: absolute;
            top: 12px;
            right: 12px;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--muted);
            transition: all 0.2s;
        }

        .modal-close:hover {
            background: var(--bg-alt);
            color: var(--ink);
        }

        .form-field {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 6px;
            font-weight: 500;
        }

        .form-input {
            width: 100%;
            height: 44px;
            background: var(--bg-alt);
            border: 1px solid transparent;
            border-radius: var(--radius-md);
            padding: 0 14px;
            font-size: 14px;
            color: var(--ink);
            transition: all 0.2s ease;
            outline: none;
        }

        .form-input::placeholder {
            color: #B0BFCC;
        }

        .form-input:focus {
            border-color: var(--primary);
            background: #ffffff;
            box-shadow: 0 0 0 3px rgba(93, 155, 199, 0.15);
        }

        .form-textarea {
            width: 100%;
            background: var(--bg-alt);
            border: 1px solid transparent;
            border-radius: var(--radius-md);
            padding: 12px 14px;
            font-size: 14px;
            color: var(--ink);
            transition: all 0.2s ease;
            outline: none;
            resize: vertical;
            min-height: 84px;
        }

        .form-textarea::placeholder {
            color: #B0BFCC;
        }

        .form-textarea:focus {
            border-color: var(--primary);
            background: #ffffff;
            box-shadow: 0 0 0 3px rgba(93, 155, 199, 0.15);
        }

        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .font-tnum {
            font-feature-settings: "tnum";
            font-variant-numeric: tabular-nums;
        }

        @media (max-width: 639px) {
            .related-card img {
                height: 160px;
            }

            .article-prose {
                font-size: 15px;
            }

            .article-prose h2 {
                font-size: 20px;
            }

            .article-prose h3 {
                font-size: 18px;
            }

            .modal-panel {
                padding: 24px;
            }
        }