/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --bg-body: #F5F9FC;
  --bg-nav: #E9F1F8;
  --bg-card: #FFFFFF;
  --bg-panel: #F0F6FC;
  --bg-soft: #F7FAFD;
  --text-primary: #1E3A5F;
  --text-heading: #152C47;
  --text-secondary: #54708F;
  --text-muted: #8CA5BF;
  --accent: #FF7A45;
  --accent-hover: #E8682E;
  --accent-soft: #FFF0E6;
  --border: #E5EDF5;
  --success: #2BB673;
  --warning: #F0A020;
  --info: #3E7BFA;
  --danger: #E5585C;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-input: 10px;
  --shadow-card: 0 4px 24px rgba(30,58,95,0.07);
  --shadow-hover: 0 14px 36px rgba(30,58,95,0.12);
  --nav-width: 260px;
  --content-max: 1280px;
  --space-section: 100px;
  --space-section-mobile: 64px;
  --font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
}
/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
ul, ol { list-style: none; margin: 0; padding: 0; }
button { font: inherit; cursor: pointer; border: none; background: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; color: var(--text-heading); line-height: 1.3; font-weight: 700; }
p { margin: 0; }
time { font-size: 13px; color: var(--text-muted); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.container { max-width: var(--content-max); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 24px; }
.section__header { text-align: center; margin-bottom: 48px; }
.section__title { font-size: 32px; letter-spacing: .5px; }
.section__subtitle { color: var(--text-secondary); margin-top: 8px; font-size: 15px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255,122,69,.25);
}
.btn--primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(255,122,69,.32); }
.btn--primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(255,122,69,.2); }
.btn--primary:disabled { background: #ccc; box-shadow: none; cursor: not-allowed; transform: none; }
.btn--secondary {
  background: #fff;
  color: var(--text-primary);
  border-color: #DCE8F2;
}
.btn--secondary:hover { border-color: var(--accent); color: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(30,58,95,.08); }
.btn--secondary:active { transform: translateY(0); }
.btn--lg { height: 54px; padding: 0 40px; font-size: 16px; }

/* ===== 移动端顶栏 ===== */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 200;
}
.mobile-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.hamburger {
  width: 40px; height: 40px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--bg-soft);
}
.hamburger span {
  width: 18px; height: 2px;
  background: var(--text-heading);
  border-radius: 2px;
  transition: all .3s;
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(21,44,71,.4);
  z-index: 149;
  opacity: 0;
  transition: opacity .3s;
}
.drawer-overlay.show { opacity: 1; }

/* ===== 左侧导航 ===== */
.sidebar {
  width: var(--nav-width);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  background: var(--bg-nav);
  border-right: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  z-index: 150;
  transition: transform .3s ease;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px 20px;
  border-bottom: 1px dashed var(--border);
}
.brand__icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(255,122,69,.3);
}
.brand__text { font-size: 22px; font-weight: 700; color: var(--text-heading); letter-spacing: 1px; }
.brand__label { display: block; font-size: 11px; color: var(--text-muted); margin-top: 2px; letter-spacing: .5px; }
.nav-list { flex: 1; padding: 16px 12px; }
.nav-item { margin-bottom: 4px; }
.nav-link {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  position: relative;
  transition: background .2s, color .2s;
}
.nav-link:hover { background: rgba(255,255,255,.7); color: var(--text-heading); }
.nav-link.active {
  background: #fff;
  color: var(--text-heading);
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(30,58,95,.06);
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 20px;
  border-radius: 0 4px 4px 0;
  background: var(--accent);
}
.nav-link .nav-icon {
  width: 20px; height: 20px;
  margin-right: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  opacity: .7;
}
.sidebar-footer {
  padding: 16px 20px 20px;
  border-top: 1px dashed var(--border);
}
.sidebar-footer .hint {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
  background: rgba(255,255,255,.5);
  border-radius: 8px;
  padding: 10px 12px;
}

/* ===== 主内容区 ===== */
.main-content { margin-left: var(--nav-width); min-height: 100vh; display: flex; flex-direction: column; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  min-height: 76vh;
  display: flex;
  align-items: center;
  padding: 80px 24px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,.88) 0%, rgba(255,255,255,.7) 60%, rgba(245,249,252,.35) 100%);
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero__title {
  font-size: 42px;
  line-height: 1.25;
  letter-spacing: .5px;
  margin-bottom: 16px;
}
.hero__title .highlight {
  color: var(--accent);
}
.hero__subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero__stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}
.stat__number {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1.2;
}
.stat__number em { font-style: normal; font-size: 16px; color: var(--accent); margin-left: 2px; }
.stat__label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== 玩法步骤 ===== */
.steps-section { padding: var(--space-section) 24px; }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
  position: relative;
}
.step {
  text-align: center;
  position: relative;
  padding: 0 10px;
}
.step__num {
  width: 48px; height: 48px;
  border-radius: 999px;
  background: #DCE8F2;
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 2px 8px rgba(30,58,95,.08);
}
.step__num.active { background: var(--accent); color: #fff; box-shadow: 0 6px 16px rgba(255,122,69,.3); }
.step__title { font-size: 18px; font-weight: 600; color: var(--text-heading); margin-bottom: 8px; }
.step__desc { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.step::after {
  content: '';
  position: absolute;
  top: 24px;
  right: -24px;
  width: 24px;
  border-top: 1px dashed #C4D6E6;
  transform: translateX(50%);
}
.step:last-child::after { display: none; }

/* ===== 奖励预览 ===== */
.rewards-section { background: var(--bg-card); padding: var(--space-section) 24px; }
.rewards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.reward-card {
  background: #fff;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: transform .3s, box-shadow .3s;
}
.reward-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.reward-card__media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-soft); }
.reward-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.reward-card:hover .reward-card__media img { transform: scale(1.03); }
.reward-card__badge {
  position: absolute;
  top: 12px; right: 12px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  color: #fff;
  background: var(--success);
  box-shadow: 0 2px 8px rgba(0,0,0,.1);
}
.reward-card__badge--warning { background: var(--warning); }
.reward-card__badge--muted { background: var(--text-muted); }
.reward-card__body { padding: 24px; }
.reward-card__title { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.reward-card__desc { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ===== 任务进度 ===== */
.task-section { padding: var(--space-section) 24px; }
.task-panel {
  background: var(--bg-panel);
  border-radius: 20px;
  padding: 32px;
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--border);
}
.task-panel__row { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 20px; flex-wrap: wrap; }
.task-panel__title { font-size: 22px; font-weight: 700; }
.task-panel__count { font-size: 14px; color: var(--text-secondary); }
.task-panel__count strong { color: var(--accent); font-size: 18px; }
.task-progress { height: 8px; background: #DCE8F2; border-radius: 999px; overflow: hidden; margin-bottom: 28px; }
.task-progress__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #FFA26B);
  border-radius: 999px;
  transition: width .6s ease;
}
.task-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 32px; }
.task-item { display: flex; align-items: center; gap: 12px; padding: 8px 0; }
.task-item__checkbox {
  width: 20px; height: 20px;
  border: 2px solid #B8CDE0;
  border-radius: 6px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  transition: all .2s;
}
.task-item.done .task-item__checkbox { background: var(--success); border-color: var(--success); }
.task-item.done .task-item__label { color: var(--text-muted); text-decoration: line-through; }
.task-item__label { font-size: 15px; color: var(--text-primary); }
.task-countdown {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}
.countdown-time {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: 2px;
  background: #fff;
  padding: 4px 12px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(30,58,95,.06);
}

/* ===== CTA ===== */
.cta-section {
  text-align: center;
  padding: var(--space-section) 24px;
  background: var(--bg-soft);
}
.cta-section__title { font-size: 30px; margin-bottom: 12px; }
.cta-section__desc { color: var(--text-secondary); font-size: 15px; margin-bottom: 28px; }
.cta-section__meta { font-size: 12px; color: var(--text-muted); margin-top: 16px; }

/* ===== 资讯列表 ===== */
.news-section { padding: var(--space-section) 24px; }
.news-layout { display: grid; grid-template-columns: 1fr 320px; gap: 32px; margin-top: 36px; }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 24px 28px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: box-shadow .3s, transform .2s;
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.news-card__title { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.news-card__title a:hover { color: var(--accent); }
.news-card__excerpt { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card__meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.tag--category { background: var(--accent-soft); color: var(--accent-hover); }
.tag--info { background: rgba(62,123,250,.1); color: var(--info); }
.news-card__link { font-size: 13px; color: var(--info); margin-left: auto; }
.news-card__link:hover { color: var(--accent); }
.news-sidebar { position: sticky; top: 24px; align-self: start; }
.news-sidebar__card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}
.news-sidebar__title { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.cat-filter { display: flex; flex-direction: column; gap: 8px; }
.cat-filter a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  transition: all .2s;
}
.cat-filter a:hover { background: var(--accent-soft); border-color: rgba(255,122,69,.3); color: var(--accent-hover); }
.cat-filter a em { font-style: normal; font-size: 12px; color: var(--text-muted); }

/* ===== 空状态 ===== */
.empty-state {
  text-align: center;
  padding: 56px 24px;
  background: #fff;
  border-radius: var(--radius-card);
  border: 1px dashed var(--border);
}
.empty-state__icon {
  font-size: 42px;
  margin-bottom: 12px;
  background: var(--bg-soft);
  width: 72px; height: 72px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  margin-right: auto;
}
.empty-state__text { font-size: 15px; color: var(--text-muted); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-card); padding: var(--space-section) 24px; }
.faq-list { max-width: 800px; margin: 36px auto 0; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow .2s;
}
.faq-item.open { box-shadow: var(--shadow-card); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-heading);
  cursor: pointer;
  user-select: none;
}
.faq-toggle {
  width: 24px; height: 24px;
  border-radius: 999px;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-primary);
  transition: transform .3s;
  flex-shrink: 0;
}
.faq-item.open .faq-toggle { transform: rotate(45deg); color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .3s;
  padding: 0 24px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }
.faq-answer p { margin-bottom: 8px; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--text-heading);
  color: rgba(255,255,255,.75);
  padding: 60px 24px 24px;
  margin-top: auto;
}
.footer-grid {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .brand__text { color: #fff; }
.footer-brand p { font-size: 14px; margin-top: 12px; max-width: 280px; line-height: 1.7; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: 14px; color: rgba(255,255,255,.65); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  max-width: var(--content-max);
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,.5);
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .rewards-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .step::after { display: none; }
}
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    box-shadow: 4px 0 30px rgba(21,44,71,.15);
  }
  .sidebar.open { transform: translateX(0); }
  .mobile-topbar { display: flex; }
  .drawer-overlay.show { display: block; }
  .main-content { margin-left: 0; }
  .hero { padding-top: 96px; }
  :root { --space-section: 72px; }
  .hero__title { font-size: 34px; }
  .section__title { font-size: 28px; }
  .news-layout { grid-template-columns: 1fr; }
  .news-sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero { padding: 100px 16px 60px; min-height: 60vh; }
  .hero__title { font-size: 28px; }
  .hero__subtitle { font-size: 15px; }
  .hero__stats { gap: 24px; }
  .stat__number { font-size: 24px; }
  .rewards-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .task-list { grid-template-columns: 1fr; }
  .task-panel { padding: 24px 20px; }
  .section { padding: 56px 16px; }
  .cta-section { padding: 56px 16px; }
  .news-section { padding: 56px 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .container { padding: 0 16px; }
}
@media (max-width: 520px) {
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; }
  .hero__stats { gap: 16px; flex-direction: column; }
  .stat { display: flex; align-items: center; gap: 10px; }
  .stat__label { margin: 0; }
  .news-card { padding: 20px; }
  .news-card__meta { gap: 10px; }
  .news-card__link { margin-left: 0; }
  .faq-question { padding: 14px 18px; font-size: 14px; }
  .faq-answer { padding: 0 18px; }
  .faq-item.open .faq-answer { padding: 0 18px 16px; }
}

/* roulang page: article */
:root {
    --color-bg: #F5F9FC;
    --color-sidebar: #E9F1F8;
    --color-primary: #1E3A5F;
    --color-heading: #152C47;
    --color-accent: #FF7A45;
    --color-accent-hover: #E8682E;
    --color-success: #2BB673;
    --color-warning: #F0A020;
    --color-info: #3E7BFA;
    --color-error: #E5585C;
    --color-border: #E5EDF5;
    --color-text: #33475B;
    --color-text-weak: #6B8299;
    --color-card-bg: #FFFFFF;
    --color-footer-bg: #152C47;
    --color-footer-text: #A7BDD4;
    --radius-card: 16px;
    --radius-btn: 12px;
    --radius-input: 10px;
    --radius-tag: 999px;
    --shadow-card: 0 4px 24px rgba(30,58,95,0.07);
    --shadow-hover: 0 14px 36px rgba(30,58,95,0.12);
    --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    --sidebar-width: 260px;
    --content-max: 1280px;
    --text-max: 720px;
    --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul, ol { list-style: none; }

h1, h2, h3, h4 { color: var(--color-heading); line-height: 1.3; font-weight: 700; }

/* ===== 品牌组件 ===== */
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.brand__icon {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: var(--color-accent);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(255,122,69,0.3);
}
.brand__text {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-headed);
    letter-spacing: 0.5px;
    color: var(--color-heading);
}

/* ===== 移动端顶部导航 ===== */
.mobile-topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1000;
    box-shadow: 0 2px 12px rgba(30,58,95,0.04);
}
.mobile-brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.mobile-brand .brand__icon {
    width: 32px;
    height: 32px;
    font-size: 17px;
    border-radius: 10px;
}
.mobile-brand .brand__text {
    font-size: 20px;
}
.hamburger {
    width: 40px;
    height: 40px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border-radius: 10px;
    transition: background var(--transition);
}
.hamburger:hover { background: var(--color-bg); }
.hamburger span {
    width: 20px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== 移动抽屉 ===== */
.drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(21,44,71,0.45);
    z-index: 1001;
    opacity: 0;
    transition: opacity var(--transition);
}
.drawer-overlay.is-visible { display: block; opacity: 1; }
.drawer {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    max-width: 82vw;
    background: #fff;
    z-index: 1002;
    transform: translateX(-100%);
    transition: transform var(--transition);
    padding: 20px;
    overflow-y: auto;
    box-shadow: 4px 0 20px rgba(21,44,71,0.08);
}
.drawer.is-open { transform: translateX(0); }
.drawer-nav { margin-top: 24px; }
.drawer-nav__item {
    display: block;
    padding: 12px 16px;
    border-radius: 12px;
    color: var(--color-primary);
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 4px;
    transition: background var(--transition), color var(--transition);
}
.drawer-nav__item:hover { background: var(--color-bg); color: var(--color-accent-hover); }
.drawer-nav__item.is-active { background: var(--color-sidebar); color: var(--color-accent-hover); font-weight: 600; }

/* ===== 左侧导航 ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--color-sidebar);
    border-right: 1px dashed #D3E0EC;
    display: flex;
    flex-direction: column;
    z-index: 999;
}
.sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 24px 20px;
}
.sidebar-brand {
    padding: 12px 8px 24px;
    border-bottom: 1px solid rgba(30,58,95,0.08);
    margin-bottom: 16px;
}
.sidebar-brand .brand__text {
    font-size: 22px;
}
.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.nav-item {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 0 14px;
    border-radius: 12px;
    color: var(--color-primary);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: background var(--transition), color var(--transition);
    border-left: 4px solid transparent;
}
.nav-item:hover {
    background: #fff;
    color: var(--color-accent-hover);
}
.nav-item.is-active {
    background: #fff;
    border-left-color: var(--color-accent);
    color: var(--color-heading);
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(30,58,95,0.05);
}
.sidebar-bottom {
    padding: 20px 8px 8px;
    border-top: 1px solid rgba(30,58,95,0.08);
}
.sidebar-bottom p {
    font-size: 12px;
    color: var(--color-text-weak);
    line-height: 1.6;
}

/* ===== 主内容区 ===== */
.main-wrapper {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 文章 Banner ===== */
.article-banner {
    position: relative;
    padding: 64px 48px 48px;
    background-image: linear-gradient(rgba(245,249,252,0.82), rgba(245,249,252,0.9)), url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--color-border);
}
.article-banner__inner {
    max-width: var(--text-max);
    margin: 0 auto;
}
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-text-weak);
    margin-bottom: 20px;
}
.breadcrumb a {
    color: var(--color-primary);
    transition: color var(--transition);
}
.breadcrumb a:hover { color: var(--color-accent-hover); }
.breadcrumb__sep { color: #B8C9DB; }
.article-title {
    font-size: 38px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-heading);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--color-text-weak);
}
.article-meta__item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-meta__cat {
    display: inline-block;
    padding: 4px 14px;
    background: #FFF0E6;
    color: var(--color-accent-hover);
    border-radius: var(--radius-tag);
    font-size: 13px;
    font-weight: 600;
}
.article-meta__dot {
    display: inline-block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #C5D3E2;
}

/* ===== 文章正文区 ===== */
.article-container {
    flex: 1;
    max-width: var(--content-max);
    width: 100%;
    margin: 0 auto;
    padding: 48px 24px;
}
.article-content {
    max-width: var(--text-max);
    margin: 0 auto;
    font-size: 17px;
    line-height: 1.8;
    color: var(--color-text);
}
.article-content h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-heading);
    margin: 44px 0 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--color-border);
}
.article-content h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-heading);
    margin: 32px 0 14px;
}
.article-content p {
    margin-bottom: 20px;
}
.article-content a {
    color: var(--color-accent-hover);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-content blockquote {
    margin: 28px 0;
    padding: 20px 24px;
    background: #F0F6FC;
    border-left: 4px solid var(--color-accent);
    border-radius: 0 12px 12px 0;
    color: var(--color-primary);
    font-size: 16px;
}
.article-content img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-card);
    margin: 28px 0;
    box-shadow: var(--shadow-card);
}
.article-content ul,
.article-content ol {
    margin-bottom: 22px;
    padding-left: 24px;
}
.article-content ul li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 10px;
}
.article-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
}
.article-content ol li {
    list-style: decimal;
    margin-bottom: 10px;
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 15px;
}
.article-content th,
.article-content td {
    border: 1px solid var(--color-border);
    padding: 12px 16px;
    text-align: left;
}
.article-content th {
    background: var(--color-sidebar);
    font-weight: 600;
    color: var(--color-heading);
}

/* ===== 空状态 ===== */
.article-empty {
    max-width: 480px;
    margin: 60px auto;
    text-align: center;
    padding: 48px 24px;
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
}
.article-empty__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    border-radius: 20px;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--color-text-weak);
}
.article-empty h2 {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--color-heading);
}
.article-empty p {
    color: var(--color-text-weak);
    margin-bottom: 24px;
}

/* ===== 标签区 ===== */
.article-tags {
    max-width: var(--text-max);
    margin: 0 auto 48px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-tag);
    font-size: 13px;
    color: var(--color-primary);
    transition: all var(--transition);
}
.tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-hover);
    background: #FFF0E6;
}

/* ===== 相关推荐 ===== */
.related-posts {
    max-width: var(--text-max);
    margin: 0 auto 56px;
}
.related-posts__title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 28px;
    position: relative;
    padding-left: 16px;
}
.related-posts__title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 4px;
    border-radius: 4px;
    background: var(--color-accent);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    display: block;
    background: var(--color-card-bg);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: transform var(--transition), box-shadow var(--transition);
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}
.related-card__img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    transition: transform var(--transition);
}
.related-card:hover .related-card__img { transform: scale(1.03); }
.related-card__body { padding: 20px 20px 22px; }
.related-card__tag {
    display: inline-block;
    padding: 3px 12px;
    background: #FFF0E6;
    color: var(--color-accent-hover);
    border-radius: var(--radius-tag);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
}
.related-card__title {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 8px;
    line-height: 1.4;
    transition: color var(--transition);
}
.related-card:hover .related-card__title { color: var(--color-accent-hover); }
.related-card__desc {
    font-size: 14px;
    color: var(--color-text-weak);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    overflow: hidden;
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 30px;
    border-radius: var(--radius-btn);
    font-size: 16px;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
}
.btn-primary {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 16px rgba(255,122,69,0.3);
}
.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(232,104,46,0.35);
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(255,122,69,0.3);
}
.btn-primary:focus-visible {
    outline: 3px solid rgba(255,122,69,0.4);
    outline-offset: 2px;
}
.btn-primary:disabled {
    background: #C9D3DE;
    box-shadow: none;
    transform: none;
    cursor: not-allowed;
}
.btn-outline {
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-primary);
}
.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-hover);
    background: #FFF8F3;
}
.btn-outline:focus-visible {
    outline: 3px solid rgba(255,122,69,0.25);
    outline-offset: 2px;
}

/* ===== 文章底部 ===== */
.article-bottom {
    max-width: var(--text-max);
    margin: 0 auto 24px;
    text-align: center;
}
.article-bottom .btn {
    min-width: 180px;
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--color-footer-bg);
    color: var(--color-footer-text);
    padding: 56px 48px 28px;
    margin-top: auto;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    max-width: var(--content-max);
    margin: 0 auto;
}
.footer-brand .brand__text { color: #fff; }
.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    line-height: 1.7;
    max-width: 360px;
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul a {
    font-size: 14px;
    color: var(--color-footer-text);
    transition: color var(--transition);
}
.footer-col ul a:hover { color: var(--color-accent); }
.footer-col ul span {
    font-size: 14px;
    color: var(--color-footer-text);
    opacity: 0.75;
}
.footer-bottom {
    max-width: var(--content-max);
    margin: 40px auto 0;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .sidebar { display: none; }
    .mobile-topbar { display: flex; }
    .main-wrapper { margin-left: 0; }
    .drawer { display: block; }
    .article-banner { padding: 56px 24px 40px; }
    .article-container { padding: 36px 16px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .site-footer { padding: 44px 24px 20px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
    .article-banner { padding: 40px 16px 32px; }
    .article-title { font-size: 30px; }
    .article-content { font-size: 16px; }
    .article-content h2 { font-size: 24px; }
    .article-content h3 { font-size: 19px; }
    .related-grid { grid-template-columns: 1fr; gap: 16px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
    .article-banner { padding: 32px 12px 28px; }
    .article-title { font-size: 26px; line-height: 1.35; }
    .article-meta { gap: 10px; font-size: 13px; flex-direction: column; align-items: flex-start; }
    .article-container { padding: 24px 12px; }
    .article-content { font-size: 15px; line-height: 1.75; }
    .btn { height: 44px; padding: 0 22px; font-size: 15px; }
    .site-footer { padding: 36px 16px 16px; }
}

/* roulang page: category1 */
:root {
  --color-bg: #F5F9FC;
  --color-sidebar: #E9F1F8;
  --color-text: #1E3A5F;
  --color-title: #152C47;
  --color-accent: #FF7A45;
  --color-accent-hover: #E8682E;
  --color-success: #2BB673;
  --color-warning: #F0A020;
  --color-info: #3E7BFA;
  --color-error: #E5585C;
  --color-border: #E5EDF5;
  --color-card: #FFFFFF;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 24px rgba(30, 58, 95, 0.07);
  --shadow-card-hover: 0 14px 36px rgba(30, 58, 95, 0.12);
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --space-section: 96px;
  --space-section-mobile: 60px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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

input, textarea {
  font-family: inherit;
}

.page-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s, border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255, 122, 69, 0.25);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 122, 69, 0.32);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 14px rgba(255, 122, 69, 0.2);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(255, 122, 69, 0.35);
  outline-offset: 2px;
}

.btn-outline {
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-title);
  box-shadow: 0 2px 8px rgba(30, 58, 95, 0.04);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(30, 58, 95, 0.08);
}

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

.btn-outline:focus-visible {
  outline: 3px solid rgba(255, 122, 69, 0.25);
  outline-offset: 2px;
}

.btn-light {
  background: #fff;
  color: var(--color-title);
  box-shadow: 0 6px 24px rgba(21, 44, 71, 0.16);
}

.btn-light:hover {
  background: #F5F9FC;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(21, 44, 71, 0.2);
}

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

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

.btn-lg {
  height: 56px;
  padding: 0 36px;
  font-size: 17px;
  border-radius: 14px;
}

/* ===== 品牌 ===== */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand__icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  border-radius: 12px;
  flex-shrink: 0;
}

.brand__text {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-title);
  letter-spacing: 0.5px;
}

/* ===== 左侧导航 ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--color-sidebar);
  border-right: 1px dashed rgba(30, 58, 95, 0.15);
  z-index: 1200;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  overflow-y: auto;
}

.sidebar-brand {
  margin-bottom: 28px;
  padding: 0 8px;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 16px;
  border-radius: 12px;
  color: var(--color-text);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
  position: relative;
}

.sidebar-nav .nav-link:hover {
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-title);
}

.sidebar-nav .nav-link:focus-visible {
  outline: 3px solid rgba(255, 122, 69, 0.3);
  outline-offset: -2px;
}

.sidebar-nav .nav-link.active {
  background: #fff;
  color: var(--color-title);
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(30, 58, 95, 0.06);
}

.sidebar-nav .nav-link.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--color-accent);
}

.sidebar-footer {
  margin-top: auto;
  padding: 16px;
  background: rgba(21, 44, 71, 0.04);
  border-radius: 16px;
  font-size: 13px;
  color: rgba(30, 58, 95, 0.7);
  line-height: 1.7;
}

.sidebar-footer p {
  margin: 2px 0;
}

/* ===== 移动端顶栏 ===== */
.mobile-topbar {
  display: none;
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(21, 44, 71, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  z-index: 1050;
}

.nav-overlay.show {
  opacity: 1;
  visibility: visible;
}

.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 9px;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.hamburger:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(30, 58, 95, 0.08);
}

.hamburger:focus-visible {
  outline: 3px solid rgba(255, 122, 69, 0.3);
}

.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-title);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== 内容主区 ===== */
.content-main {
  margin-left: 260px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 页面 Hero ===== */
.page-hero {
  position: relative;
  padding: 96px 0 88px;
  overflow: hidden;
  background: #E9F1F8;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.hero-mask {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.78);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  text-align: left;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 14px;
  background: #FFF0E6;
  color: var(--color-accent);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-content h1 {
  font-size: 40px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-title);
  margin-bottom: 18px;
}

.hero-content p {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(30, 58, 95, 0.85);
  margin-bottom: 32px;
}

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

/* ===== 板块标题 ===== */
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 14px;
  background: #FFF0E6;
  color: var(--color-accent);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 30px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-title);
  margin-bottom: 12px;
}

.section-head p {
  font-size: 15px;
  color: rgba(30, 58, 95, 0.75);
}

/* ===== 登录方式卡片 ===== */
.methods-section {
  padding: var(--space-section) 0 48px;
}

.methods-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 16px;
}

.method-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.3s;
  display: flex;
  flex-direction: column;
}

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

.card-img {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #E9F1F8;
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

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

.card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: #fff;
  color: var(--color-title);
  box-shadow: 0 2px 10px rgba(30, 58, 95, 0.12);
}

.badge-recommend {
  background: var(--color-accent);
  color: #fff;
}

.badge-mobile {
  background: var(--color-info);
  color: #fff;
}

.badge-scan {
  background: var(--color-success);
  color: #fff;
}

.card-body {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: 12px;
}

.card-body p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: 20px;
  flex: 1;
}

.card-body .btn {
  align-self: flex-start;
}

/* ===== 登录流程 ===== */
.steps-section {
  padding: var(--space-section) 0;
  background: #fff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.steps-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 16px;
}

.step-item {
  text-align: center;
  position: relative;
  padding: 0 16px;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #E3EEF8;
  color: var(--color-title);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(30, 58, 95, 0.08);
}

.step-item:nth-child(2) .step-num {
  background: var(--color-accent);
  color: #fff;
}

.step-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-title);
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(30, 58, 95, 0.75);
}

.steps-flow .step-item + .step-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 24px;
  width: 32px;
  height: 0;
  border-top: 2px dashed #C6DBEF;
}

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

.faq-list {
  max-width: 820px;
  margin: 16px auto 0;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(30, 58, 95, 0.04);
  transition: box-shadow 0.3s, border-color 0.3s;
}

.faq-item.active {
  box-shadow: var(--shadow-card);
  border-color: rgba(255, 122, 69, 0.3);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
  height: 56px;
  background: transparent;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-title);
  text-align: left;
  cursor: pointer;
}

.faq-question:focus-visible {
  outline: 3px solid rgba(255, 122, 69, 0.3);
  outline-offset: -2px;
  border-radius: 16px;
}

.faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.faq-icon::before {
  width: 14px;
  height: 2px;
  top: 11px;
  left: 5px;
}

.faq-icon::after {
  width: 2px;
  height: 14px;
  top: 5px;
  left: 11px;
}

.faq-item.active .faq-icon::before {
  transform: rotate(180deg);
  opacity: 0.6;
}

.faq-item.active .faq-icon::after {
  transform: rotate(90deg);
  opacity: 0.6;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: #F7FAFD;
}

.faq-answer p {
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
}

.faq-item.active .faq-answer {
  max-height: 240px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 0 0 100px;
}

.cta-box {
  background: var(--color-title);
  border-radius: 24px;
  padding: 56px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 122, 69, 0.18);
}

.cta-box::after {
  content: "";
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(62, 123, 250, 0.15);
}

.cta-box h2 {
  color: #fff;
  font-size: 30px;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
  font-size: 16px;
  position: relative;
  z-index: 1;
}

.cta-box .btn {
  position: relative;
  z-index: 1;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-title);
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 24px;
  margin-top: auto;
}

.site-footer .brand__text {
  color: #fff;
}

.site-footer .brand__icon {
  background: var(--color-accent);
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  opacity: 0.85;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-col ul span {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

.footer-bottom {
  max-width: 1280px;
  margin: 48px auto 0;
  padding: 20px 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  flex-wrap: wrap;
}

.footer-bottom span {
  display: inline-block;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.32s ease;
    width: 280px;
    box-shadow: none;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(21, 44, 71, 0.12);
  }

  .content-main {
    margin-left: 0;
  }

  .mobile-topbar {
    display: flex;
    position: sticky;
    top: 0;
    z-index: 1100;
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
  }

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

  .steps-flow {
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .steps-flow .step-item + .step-item::before {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 60px;
  }

  .page-hero {
    padding: 64px 0 56px;
  }

  .hero-content {
    text-align: center;
    margin: 0 auto;
  }

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

  .hero-actions {
    justify-content: center;
  }

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

  .section-head h2 {
    font-size: 25px;
  }

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

  .cta-box {
    padding: 48px 20px;
  }

  .cta-box h2 {
    font-size: 24px;
  }
}

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

  .hero-content p {
    font-size: 15px;
  }

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

  .btn {
    width: 100%;
  }

  .card-body .btn {
    width: 100%;
  }

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

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

  .faq-question {
    font-size: 15px;
    padding: 0 18px;
  }

  .faq-answer p {
    padding: 0 18px 18px;
  }

  .brand__text {
    font-size: 20px;
  }
}

/* roulang page: category3 */
:root {
  --color-bg: #F5F9FC;
  --color-side: #E9F1F8;
  --color-text: #1E3A5F;
  --color-heading: #152C47;
  --color-muted: #5b7290;
  --color-accent: #FF7A45;
  --color-accent-hover: #E8682E;
  --color-success: #2BB673;
  --color-warning: #F0A020;
  --color-info: #3E7BFA;
  --color-error: #E5585C;
  --color-border: #E5EDF5;
  --color-card: #FFFFFF;
  --color-soft: #F0F6FC;
  --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 24px rgba(30, 58, 95, 0.07);
  --shadow-card-hover: 0 14px 36px rgba(30, 58, 95, 0.12);
  --transition: 0.3s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition);
}
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

.app { display: flex; min-height: 100vh; }

/* ========== 左侧导航 ========== */
.side-nav {
  width: 260px;
  position: fixed;
  inset: 0 auto 0 0;
  background: var(--color-side);
  border-right: 1px dashed var(--color-border);
  display: flex;
  flex-direction: column;
  padding: 28px 0 24px;
  z-index: 120;
}
.nav-brand { padding: 0 24px 28px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand__icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--color-accent);
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand__text {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: 1px;
  white-space: nowrap;
}
.nav-links {
  flex: 1;
  padding-top: 8px;
}
.nav-links a {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 24px 0 32px;
  border-left: 4px solid transparent;
  color: var(--color-text);
  font-size: 15px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.nav-links a:hover {
  background: #fff;
  color: var(--color-heading);
  opacity: 0.9;
}
.nav-links a.active {
  background: #fff;
  border-left-color: var(--color-accent);
  color: var(--color-heading);
  font-weight: 600;
}
.nav-bottom { padding: 24px 24px 0; }
.nav-bottom .btn { width: 100%; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}
.btn:focus-visible { outline: 3px solid rgba(255, 122, 69, 0.3); outline-offset: 2px; }
.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255, 122, 69, 0.25); }
.btn-primary:active { background: #d45a24; transform: translateY(0); box-shadow: none; }
.btn-secondary {
  background: #fff;
  color: var(--color-heading);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent-hover); transform: translateY(-2px); }
.btn-secondary:active { transform: translateY(0); }
.btn-block { display: flex; }

/* ========== 移动端顶部栏 ========== */
.mobile-topbar {
  display: none;
  position: sticky;
  top: 0;
  height: 64px;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 200;
}
.mobile-brand { display: inline-flex; align-items: center; gap: 8px; }
.mobile-brand .brand__icon { width: 32px; height: 32px; font-size: 18px; border-radius: 8px; }
.mobile-brand .brand__text { font-size: 20px; font-weight: 700; color: var(--color-heading); }
.hamburger { width: 44px; height: 44px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 5px; border-radius: 8px; }
.hamburger span { display: block; width: 22px; height: 2px; border-radius: 2px; background: var(--color-heading); transition: transform 0.3s, opacity 0.3s; }
.hamburger:hover { background: var(--color-soft); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== 遮罩 ========== */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(21, 44, 71, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 110;
}
.nav-overlay.active { opacity: 1; visibility: visible; }

/* ========== 主内容区 ========== */
.main-content {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.page-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }

/* ========== Hero 横幅 ========== */
.page-hero {
  position: relative;
  background-image: linear-gradient(90deg, rgba(245,249,252,0.94) 0%, rgba(245,249,252,0.88) 60%, rgba(233,241,248,0.92) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 88px 0 72px;
  border-bottom: 1px solid var(--color-border);
}
.page-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 20px;
}
.page-hero .breadcrumb a:hover { color: var(--color-accent); }
.page-hero .breadcrumb span { color: var(--color-muted); }
.page-hero h1 {
  font-size: 42px;
  line-height: 1.25;
  color: var(--color-heading);
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.page-hero .hero-sub {
  font-size: 17px;
  color: var(--color-text);
  max-width: 640px;
  margin-bottom: 24px;
}
.page-hero .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #fff;
  border-radius: var(--radius-tag);
  padding: 6px 16px;
  font-size: 13px;
  color: var(--color-text);
  box-shadow: 0 2px 8px rgba(30,58,95,0.06);
}
.hero-meta .meta-item i {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}
.hero-meta .meta-item:nth-child(2) i { background: var(--color-accent); }
.hero-meta .meta-item:nth-child(3) i { background: var(--color-info); }

/* ========== 图文交错区块 ========== */
.alt-section { padding: 100px 0 40px; }
.alt-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 48px 0;
}
.alt-block__media {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--color-soft);
  position: relative;
}
.alt-block__media img { width: 100%; height: 260px; object-fit: cover; transition: transform 0.4s ease; }
.alt-block:hover .alt-block__media img { transform: scale(1.03); }
.alt-block__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-card);
  border: 1px solid rgba(255,255,255,0.6);
  pointer-events: none;
}
.alt-block--reverse .alt-block__media { order: 2; }
.alt-block__content { padding: 8px 0; }
.alt-block__tag {
  display: inline-flex;
  align-items: center;
  background: #FFF0E6;
  color: var(--color-accent-hover);
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-tag);
  padding: 4px 14px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.alt-block__content h3 {
  font-size: 26px;
  line-height: 1.35;
  color: var(--color-heading);
  margin-bottom: 12px;
  font-weight: 700;
}
.alt-block__content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 20px;
}
.alt-block__list { display: flex; flex-direction: column; gap: 10px; }
.alt-block__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text);
}
.alt-block__list .check-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(43,182,115,0.12);
  color: var(--color-success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ========== 提示框 ========== */
.notice-section { padding: 32px 0 40px; }
.notice-box {
  background: linear-gradient(135deg, #FFF4EC 0%, #FFF9F4 100%);
  border: 1px solid rgba(255,122,69,0.25);
  border-radius: var(--radius-card);
  padding: 32px 36px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  position: relative;
}
.notice-box .notice-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-accent);
  color: #fff;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.notice-box p {
  font-size: 15px;
  color: var(--color-heading);
  line-height: 1.8;
  padding-top: 6px;
}

/* ========== 步骤流程 ========== */
.steps-section { padding: 60px 0 90px; }
.section-title-wrap { text-align: center; margin-bottom: 48px; }
.section-title-wrap h2 {
  font-size: 30px;
  color: var(--color-heading);
  margin-bottom: 10px;
  font-weight: 700;
}
.section-title-wrap p {
  font-size: 15px;
  color: var(--color-muted);
  max-width: 600px;
  margin: 0 auto;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step-counter;
}
.step-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid transparent;
}
.step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card-hover); border-color: var(--color-border); }
.step-card::before {
  content: "";
  position: absolute;
  top: 32px;
  left: calc(100% - 4px);
  width: calc(100% - 16px);
  height: 1px;
  border-top: 2px dashed var(--color-border);
  z-index: 0;
}
.steps-grid .step-card:last-child::before { display: none; }
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-soft);
  color: var(--color-info);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}
.step-card:hover .step-num { background: var(--color-accent); color: #fff; transition: background 0.3s, color 0.3s; }
.step-card h3 {
  font-size: 17px;
  color: var(--color-heading);
  margin-bottom: 8px;
  font-weight: 600;
}
.step-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ========== FAQ ========== */
.faq-section { padding: 0 0 100px; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item.open { border-color: rgba(255,122,69,0.35); box-shadow: 0 4px 16px rgba(30,58,95,0.06); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-heading);
  text-align: left;
  background: none;
  width: 100%;
}
.faq-question:hover .faq-icon { background: var(--color-accent); color: #fff; }
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-soft);
  color: var(--color-info);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--color-accent); color: #fff; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.8;
  background: var(--color-bg);
  border-radius: 10px;
  padding: 14px 18px;
}

/* ========== CTA 区 ========== */
.cta-section { padding: 0 0 100px; }
.cta-box {
  background: linear-gradient(120deg, rgba(255,122,69,0.08) 0%, rgba(255,255,255,1) 45%, rgba(62,123,250,0.08) 100%), url('/assets/images/backpic/back-3.webp');
  background-size: cover;
  background-position: center;
  border-radius: 24px;
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--color-border);
}
.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(245,249,252,0.72);
  pointer-events: none;
}
.cta-box > * { position: relative; z-index: 1; }
.cta-box h2 {
  font-size: 32px;
  color: var(--color-heading);
  margin-bottom: 12px;
  font-weight: 700;
}
.cta-box p {
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 28px;
}
.cta-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ========== 页脚 ========== */
.site-footer {
  margin-top: auto;
  background: var(--color-heading);
  color: rgba(255,255,255,0.85);
  padding: 64px 44px 28px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand .brand__icon { background: rgba(255,122,69,0.9); }
.footer-brand .brand__text { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.7); max-width: 300px; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
}
.footer-col ul li a:hover { color: var(--color-accent); }
.footer-col ul li span { color: rgba(255,255,255,0.6); font-size: 14px; }
.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.14);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .mobile-topbar { display: flex; }
  .side-nav {
    transform: translateX(-100%);
    transition: transform 0.35s ease, box-shadow 0.35s ease;
    box-shadow: 0 0 40px rgba(30,58,95,0.12);
  }
  .side-nav.mobile-open { transform: translateX(0); box-shadow: 0 0 60px rgba(30,58,95,0.2); }
  .main-content { margin-left: 0; }
  .page-hero { padding: 64px 0 48px; }
  .page-hero h1 { font-size: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .page-container { padding: 0 16px; }
  .page-hero { padding: 48px 0 40px; }
  .page-hero h1 { font-size: 28px; }
  .page-hero .hero-sub { font-size: 15px; }
  .page-hero .breadcrumb { font-size: 12px; flex-wrap: wrap; }
  .alt-section { padding: 56px 0 24px; }
  .alt-block { grid-template-columns: 1fr; gap: 24px; padding: 32px 0; }
  .alt-block--reverse .alt-block__media { order: 0; }
  .alt-block__media img { height: 200px; }
  .alt-block__content h3 { font-size: 22px; }
  .notice-section { padding: 20px 0 24px; }
  .notice-box { flex-direction: column; padding: 24px 20px; gap: 12px; }
  .steps-section { padding: 40px 0 56px; }
  .section-title-wrap h2 { font-size: 24px; }
  .steps-grid { grid-template-columns: 1fr; gap: 16px; }
  .step-card::before { display: none; }
  .faq-section { padding-bottom: 56px; }
  .cta-section { padding-bottom: 56px; }
  .cta-box { padding: 44px 20px; }
  .cta-box h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .site-footer { padding: 40px 20px 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .cta-btns { flex-direction: column; width: 100%; }
  .cta-btns .btn { width: 100%; }
}
@media (max-width: 520px) {
  .hero-meta { flex-direction: column; align-items: flex-start; }
  .page-hero .breadcrumb { display: none; }
  .mobile-topbar { padding: 0 12px; }
}

/* roulang page: category2 */
:root{
  --bg:#F5F9FC;
  --sidebar-bg:#E9F1F8;
  --text:#1E3A5F;
  --heading:#152C47;
  --accent:#FF7A45;
  --accent-hover:#E8682E;
  --success:#2BB673;
  --warning:#F0A020;
  --info:#3E7BFA;
  --error:#E5585C;
  --border:#E5EDF5;
  --card-shadow:0 4px 24px rgba(30,58,95,0.07);
  --card-shadow-hover:0 14px 36px rgba(30,58,95,0.12);
  --radius-card:16px;
  --radius-btn:12px;
  --radius-tag:999px;
  --font:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block;border:0}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,textarea{font-family:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
@media (max-width:520px){.container{padding:0 16px}}

/* ===== 左侧导航 ===== */
.sidebar{
  position:fixed;
  left:0;top:0;bottom:0;
  width:260px;
  background:var(--sidebar-bg);
  border-right:1px dashed #ccd9e6;
  z-index:100;
  display:flex;
  flex-direction:column;
  padding:24px 18px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:8px 6px 24px;
}
.brand__icon{
  width:42px;height:42px;
  border-radius:12px;
  background:var(--heading);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  font-weight:700;
  flex-shrink:0;
}
.brand__text{
  font-size:24px;
  font-weight:700;
  color:var(--heading);
  line-height:1.2;
  letter-spacing:.5px;
}
.sidebar-nav{
  display:flex;
  flex-direction:column;
  gap:4px;
}
.sidebar-nav .nav-label{
  font-size:12px;
  color:#7C94AC;
  padding:12px 8px 6px;
  letter-spacing:1px;
}
.sidebar-nav a{
  display:flex;
  align-items:center;
  height:48px;
  padding:0 16px;
  border-radius:12px;
  font-size:15px;
  font-weight:500;
  color:var(--text);
  position:relative;
  transition:background .25s,color .25s,box-shadow .25s;
}
.sidebar-nav a:hover{
  background:#fff;
  color:var(--heading);
  box-shadow:0 2px 10px rgba(30,58,95,.05);
}
.sidebar-nav a.active{
  background:#fff;
  color:var(--heading);
  font-weight:600;
  box-shadow:0 2px 10px rgba(30,58,95,.06);
}
.sidebar-nav a.active::before{
  content:'';
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:4px;height:20px;
  border-radius:0 4px 4px 0;
  background:var(--accent);
}
.sidebar-bottom{
  margin-top:auto;
  padding-top:20px;
  border-top:1px dashed rgba(30,58,95,.12);
}
.sidebar-bottom .side-note{
  font-size:12px;
  color:#7C94AC;
  line-height:1.6;
  padding:12px 8px 0;
}

/* ===== 移动端顶部栏 ===== */
.mobile-topbar{
  display:none;
}
@media (max-width:1024px){
  .mobile-topbar{
    display:flex;
    align-items:center;
    justify-content:space-between;
    position:fixed;
    top:0;left:0;right:0;
    height:64px;
    background:#fff;
    border-bottom:1px solid var(--border);
    z-index:1000;
    padding:0 16px;
    box-shadow:0 1px 8px rgba(30,58,95,.04);
  }
  .mobile-brand{
    display:flex;
    align-items:center;
    gap:8px;
  }
  .mobile-brand .brand__text{
    font-size:22px;
  }
  .hamburger{
    width:42px;height:42px;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:5px;
    border-radius:10px;
    background:var(--bg);
    transition:background .25s;
  }
  .hamburger:hover{
    background:#E8F0F8;
  }
  .hamburger span{
    display:block;
    width:18px;height:2px;
    background:var(--heading);
    border-radius:2px;
    transition:transform .3s,opacity .3s;
  }
  .hamburger.active span:nth-child(1){
    transform:translateY(7px) rotate(45deg);
  }
  .hamburger.active span:nth-child(2){
    opacity:0;
  }
  .hamburger.active span:nth-child(3){
    transform:translateY(-7px) rotate(-45deg);
  }
}

/* ===== 移动抽屉 ===== */
.mobile-drawer{
  display:none;
}
@media (max-width:1024px){
  .drawer-overlay{
    display:none;
    position:fixed;
    inset:0;
    background:rgba(21,44,71,.42);
    z-index:1100;
    opacity:0;
    transition:opacity .3s;
  }
  .drawer-overlay.open{
    display:block;
    opacity:1;
  }
  .mobile-drawer{
    display:block;
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    width:80%;
    max-width:320px;
    background:#fff;
    z-index:1200;
    padding:28px 20px 20px;
    transform:translateX(100%);
    transition:transform .32s cubic-bezier(.22,.61,.36,1);
    overflow-y:auto;
    box-shadow:-8px 0 30px rgba(21,44,71,.12);
  }
  .mobile-drawer.open{
    transform:translateX(0);
  }
  .mobile-drawer .drawer-brand{
    display:flex;
    align-items:center;
    gap:10px;
    padding:8px 4px 20px;
    border-bottom:1px solid var(--border);
    margin-bottom:16px;
  }
  .mobile-drawer .drawer-brand .brand__text{
    font-size:22px;
  }
  .drawer-nav{
    display:flex;
    flex-direction:column;
    gap:4px;
  }
  .drawer-nav .drawer-label{
    font-size:12px;
    color:#7C94AC;
    padding:12px 8px 6px;
  }
  .drawer-nav a{
    display:block;
    height:48px;
    line-height:48px;
    padding:0 16px;
    border-radius:12px;
    font-size:15px;
    font-weight:500;
    color:var(--text);
    transition:background .25s,color .25s;
  }
  .drawer-nav a:hover{
    background:var(--bg);
    color:var(--heading);
  }
  .drawer-nav a.active{
    background:var(--bg);
    color:var(--heading);
    font-weight:600;
  }
  .drawer-nav a.active{
    border-left:4px solid var(--accent);
  }
}

/* ===== 主体内容 ===== */
.main-wrap{
  margin-left:260px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.main-wrap main{
  flex:1;
}
@media (max-width:1024px){
  .main-wrap{
    margin-left:0;
    padding-top:64px;
  }
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:48px;
  padding:0 28px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  transition:all .25s ease;
}
.btn-primary{
  background:var(--accent);
  color:#fff;
  box-shadow:0 4px 14px rgba(255,122,69,.25);
}
.btn-primary:hover{
  background:var(--accent-hover);
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(255,122,69,.32);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 4px 10px rgba(255,122,69,.2);
}
.btn-secondary{
  background:#fff;
  color:var(--heading);
  border:1px solid var(--border);
}
.btn-secondary:hover{
  border-color:var(--accent);
  color:var(--accent);
  transform:translateY(-2px);
  box-shadow:0 8px 20px rgba(30,58,95,.08);
}
.btn-secondary:active{
  transform:translateY(0);
}
.btn-lg{
  height:54px;
  padding:0 36px;
  font-size:16px;
  border-radius:14px;
}

/* ===== 分类页 Hero ===== */
.page-hero{
  position:relative;
  background:#EFF6FD url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding:88px 0 76px;
  overflow:hidden;
}
.page-hero::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(245,249,252,.94) 40%,rgba(245,249,252,.78));
}
.page-hero .container{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  gap:56px;
}
.hero-text{
  flex:1.15;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(255,122,69,.12);
  color:var(--accent-hover);
  font-size:13px;
  font-weight:600;
  border-radius:var(--radius-tag);
  padding:6px 16px;
  margin-bottom:18px;
}
.page-hero h1{
  font-size:42px;
  line-height:1.25;
  color:var(--heading);
  font-weight:700;
  letter-spacing:.5px;
  margin-bottom:16px;
}
.hero-sub{
  font-size:17px;
  line-height:1.8;
  color:#48627E;
  max-width:520px;
  margin-bottom:32px;
}
.hero-actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.hero-figure{
  flex:0.85;
}
.hero-figure img{
  border-radius:20px;
  box-shadow:0 20px 48px rgba(30,58,95,.16);
  border:4px solid #fff;
  aspect-ratio:4/3;
  object-fit:cover;
  width:100%;
}
@media (max-width:1024px){
  .page-hero{
    padding:56px 0 48px;
  }
  .page-hero .container{
    flex-direction:column;
    gap:32px;
  }
  .hero-figure{
    width:100%;
    max-width:520px;
    margin:0 auto;
  }
  .hero-text{
    text-align:center;
  }
  .hero-sub{
    margin-left:auto;
    margin-right:auto;
  }
  .hero-actions{
    justify-content:center;
  }
  .page-hero h1{
    font-size:34px;
  }
}
@media (max-width:520px){
  .page-hero h1{
    font-size:28px;
  }
  .hero-sub{
    font-size:15px;
  }
  .hero-actions .btn{
    width:100%;
  }
}

/* ===== 通用区块 ===== */
.section{
  padding:92px 0;
}
@media (max-width:768px){
  .section{
    padding:56px 0;
  }
}
.section-head{
  text-align:center;
  max-width:640px;
  margin:0 auto 48px;
}
.section-head .eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  background:rgba(255,122,69,.1);
  border-radius:var(--radius-tag);
  padding:5px 14px;
  margin-bottom:14px;
}
.section-head h2{
  font-size:32px;
  line-height:1.3;
  color:var(--heading);
  font-weight:700;
  margin-bottom:12px;
}
.section-head p{
  font-size:15px;
  color:#6B819C;
  line-height:1.7;
}
@media (max-width:520px){
  .section-head h2{
    font-size:26px;
  }
}

/* ===== 时间线 ===== */
.timeline-section{
  background:transparent;
}
.timeline{
  position:relative;
  max-width:880px;
  margin:0 auto;
  padding-left:20px;
}
.timeline::before{
  content:'';
  position:absolute;
  left:47px;
  top:10px;
  bottom:10px;
  width:1px;
  border-left:2px dashed #C9DAE8;
}
.timeline-item{
  position:relative;
  display:flex;
  gap:28px;
  align-items:flex-start;
  margin-bottom:32px;
}
.timeline-item:last-child{
  margin-bottom:0;
}
.timeline-node{
  width:52px;
  height:52px;
  border-radius:50%;
  background:var(--heading);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  font-weight:700;
  flex-shrink:0;
  box-shadow:0 4px 14px rgba(21,44,71,.18);
  transition:background .3s;
  z-index:1;
}
.timeline-item:nth-child(2) .timeline-node{
  background:var(--accent);
}
.timeline-node.done{
  background:var(--success);
}
.timeline-content{
  flex:1;
  background:#fff;
  border-radius:var(--radius-card);
  padding:26px 28px;
  box-shadow:var(--card-shadow);
  border:1px solid rgba(255,255,255,.8);
  transition:box-shadow .3s,transform .3s;
}
.timeline-content:hover{
  box-shadow:var(--card-shadow-hover);
  transform:translateY(-2px);
}
.timeline-content h3{
  font-size:19px;
  color:var(--heading);
  font-weight:600;
  margin-bottom:8px;
}
.timeline-content p{
  font-size:15px;
  color:#48627E;
  line-height:1.8;
}
.timeline-meta{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:#8CA2B8;
  background:#F0F6FC;
  border-radius:var(--radius-tag);
  padding:4px 12px;
  margin-bottom:10px;
}
@media (max-width:520px){
  .timeline{
    padding-left:0;
  }
  .timeline::before{
    left:25px;
  }
  .timeline-item{
    gap:14px;
  }
  .timeline-node{
    width:50px;
    height:50px;
    font-size:14px;
  }
  .timeline-content{
    padding:18px 16px;
  }
  .timeline-content h3{
    font-size:17px;
  }
}

/* ===== 功能模块 ===== */
.features-section{
  background:#fff;
}
.features-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  max-width:1080px;
  margin:0 auto;
}
.feature-card{
  background:var(--bg);
  border:1px solid #EDF2F7;
  border-radius:var(--radius-card);
  padding:28px 24px;
  transition:box-shadow .3s,transform .3s,border-color .3s;
}
.feature-card:hover{
  box-shadow:var(--card-shadow-hover);
  transform:translateY(-4px);
  border-color:transparent;
  background:#fff;
}
.feature-icon{
  width:48px;
  height:48px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(255,122,69,.12);
  color:var(--accent);
  margin-bottom:16px;
}
.feature-card h3{
  font-size:18px;
  color:var(--heading);
  font-weight:600;
  margin-bottom:8px;
}
.feature-card p{
  font-size:14px;
  color:#5B7490;
  line-height:1.75;
}
@media (max-width:1024px){
  .features-grid{
    grid-template-columns:repeat(2,1fr);
  }
}
@media (max-width:520px){
  .features-grid{
    grid-template-columns:1fr;
  }
}

/* ===== 提示面板 ===== */
.tip-section{
  background:#F0F6FC;
}
.tip-panel{
  max-width:880px;
  margin:0 auto;
  background:rgba(255,255,255,.85);
  border-radius:20px;
  padding:36px 40px;
  border:1px solid #E1EBF4;
  box-shadow:var(--card-shadow);
}
.tip-panel h3{
  font-size:20px;
  color:var(--heading);
  font-weight:600;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  gap:10px;
}
.tip-panel h3::before{
  content:'i';
  width:26px;height:26px;
  border-radius:50%;
  background:var(--info);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  font-weight:700;
  flex-shrink:0;
}
.tip-list{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
}
.tip-list li{
  display:flex;
  gap:8px;
  font-size:14px;
  color:#48627E;
  line-height:1.65;
  padding:12px 16px;
  background:var(--bg);
  border-radius:12px;
}
.tip-list li::before{
  content:'';
  width:7px;height:7px;
  border-radius:50%;
  background:var(--accent);
  flex-shrink:0;
  margin-top:9px;
}
@media (max-width:768px){
  .tip-list{
    grid-template-columns:1fr;
  }
  .tip-panel{
    padding:24px;
  }
}

/* ===== FAQ ===== */
.faq-section{
  background:#fff;
}
.faq-list{
  max-width:820px;
  margin:0 auto;
}
.faq-item{
  background:var(--bg);
  border:1px solid #EDF2F7;
  border-radius:var(--radius-card);
  margin-bottom:14px;
  overflow:hidden;
  transition:box-shadow .3s,background .3s;
}
.faq-item.open{
  background:#fff;
  box-shadow:var(--card-shadow);
}
.faq-question{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:56px;
  padding:14px 24px;
  font-size:15px;
  font-weight:600;
  color:var(--heading);
  cursor:pointer;
}
.faq-icon{
  width:26px;height:26px;
  border-radius:50%;
  background:rgba(255,122,69,.12);
  position:relative;
  flex-shrink:0;
}
.faq-icon::before,
.faq-icon::after{
  content:'';
  position:absolute;
  background:var(--accent);
  border-radius:2px;
  transition:transform .3s,opacity .3s;
}
.faq-icon::before{
  width:12px;height:2px;
  left:50%;top:50%;
  transform:translate(-50%,-50%);
}
.faq-icon::after{
  width:2px;height:12px;
  left:50%;top:50%;
  transform:translate(-50%,-50%);
}
.faq-item.open .faq-icon::after{
  transform:translate(-50%,-50%) rotate(90deg);
  opacity:0;
}
.faq-answer{
  display:none;
  padding:0 24px 22px;
  font-size:14px;
  color:#48627E;
  line-height:1.8;
}
.faq-item.open .faq-answer{
  display:block;
  animation:fadeIn .3s ease;
}
@keyframes fadeIn{
  from{opacity:0;transform:translateY(-4px)}
  to{opacity:1;transform:translateY(0)}
}
@media (max-width:520px){
  .faq-question{
    padding:14px 16px;
    font-size:14px;
  }
  .faq-answer{
    padding:0 16px 18px;
  }
}

/* ===== CTA ===== */
.cta-section{
  background:linear-gradient(135deg,rgba(255,122,69,.08),rgba(240,248,255,.9));
  padding:76px 0;
}
.cta-box{
  max-width:680px;
  margin:0 auto;
  text-align:center;
}
.cta-box h2{
  font-size:32px;
  color:var(--heading);
  font-weight:700;
  margin-bottom:14px;
}
.cta-box p{
  font-size:16px;
  color:#48627E;
  margin-bottom:28px;
}
.cta-actions{
  display:flex;
  gap:14px;
  justify-content:center;
  flex-wrap:wrap;
}
@media (max-width:520px){
  .cta-box h2{
    font-size:24px;
  }
  .cta-actions .btn{
    width:100%;
  }
}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--heading);
  color:rgba(255,255,255,.82);
  margin-top:0;
}
.footer-grid{
  max-width:1200px;
  margin:0 auto;
  padding:60px 24px 40px;
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand .brand{
  padding:0 0 16px;
}
.footer-brand .brand .brand__icon{
  background:#fff;
  color:var(--heading);
}
.footer-brand .brand .brand__text{
  color:#fff;
}
.footer-brand p{
  font-size:14px;
  line-height:1.8;
  color:rgba(255,255,255,.62);
  max-width:320px;
}
.footer-col h4{
  color:#fff;
  font-size:16px;
  font-weight:600;
  margin-bottom:18px;
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul a{
  font-size:14px;
  color:rgba(255,255,255,.62);
  transition:color .25s,padding-left .25s;
}
.footer-col ul a:hover{
  color:var(--accent);
  padding-left:4px;
}
.footer-col ul span{
  font-size:14px;
  color:rgba(255,255,255,.45);
}
.footer-bottom{
  max-width:1200px;
  margin:0 auto;
  padding:22px 24px;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.45);
}
@media (max-width:1024px){
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:36px;
    padding:48px 24px 32px;
  }
}
@media (max-width:520px){
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
    padding:40px 16px 28px;
  }
  .footer-bottom{
    padding:18px 16px;
    justify-content:center;
    text-align:center;
  }
}

/* roulang page: category4 */
:root {
  --bg: #F5F9FC;
  --sidebar-bg: #E9F1F8;
  --text: #1E3A5F;
  --text-deep: #152C47;
  --text-weak: #5B7696;
  --accent: #FF7A45;
  --accent-hover: #E8682E;
  --border: #E5EDF5;
  --success: #2BB673;
  --warn: #F0A020;
  --info: #3E7BFA;
  --error: #E5585C;
  --card-shadow: 0 4px 24px rgba(30,58,95,0.07);
  --card-hover: 0 14px 36px rgba(30,58,95,0.12);
  --radius: 16px;
  --radius-btn: 12px;
  --radius-sm: 10px;
  --font: "PingFang SC", "Hiragino Sans GB", "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);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.section { padding: 90px 0; }
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}
.section-tag {
  display: inline-block;
  background: #FFF0E6;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.section-head h2 {
  font-size: 30px;
  color: var(--text-deep);
  line-height: 1.3;
  margin-bottom: 12px;
  font-weight: 700;
}
.section-head p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.8;
}

.mobile-topbar {
  display: none;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,122,69,0.3);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible,
.btn-ghost:focus-visible { outline: 3px solid rgba(255,122,69,0.35); outline-offset: 2px; }
.btn-ghost {
  background: #fff;
  color: var(--text-deep);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-large {
  height: 56px;
  padding: 0 42px;
  font-size: 18px;
  border-radius: 14px;
}

.layout-shell { min-height: 100vh; }
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px dashed var(--border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 28px 20px 20px;
}
.brand__icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--text-deep);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}
.brand__text {
  font-size: 23px;
  font-weight: 800;
  color: var(--text-deep);
  letter-spacing: 1px;
}
.side-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 14px;
}
.nav-link {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 18px;
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
  position: relative;
}
.nav-link:hover { background: #fff; color: var(--text-deep); }
.nav-link.active {
  background: #fff;
  color: var(--text-deep);
  font-weight: 700;
}
.nav-link.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 4px;
  background: var(--accent);
  border-radius: 0 4px 4px 0;
}
.sidebar-foot {
  padding: 20px 22px;
  border-top: 1px dashed var(--border);
  font-size: 12px;
  color: #7A94B0;
  line-height: 2;
}
.sidebar-overlay {
  display: none;
}
.main-content {
  margin-left: 260px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.reward-hero {
  position: relative;
  min-height: 460px;
  display: flex;
  align-items: center;
  padding: 72px 0;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.hero-mask {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.78);
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 700px;
}
.hero-badge {
  display: inline-block;
  background: rgba(255,122,69,0.14);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.reward-hero h1 {
  font-size: 40px;
  color: var(--text-deep);
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 16px;
}
.reward-hero p {
  font-size: 17px;
  color: var(--text);
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.compare-section { background: #fff; }
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.compare-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
}
.compare-card:hover { transform: translateY(-4px); box-shadow: var(--card-hover); }
.compare-card-accent {
  border-color: rgba(255,122,69,0.4);
  background: linear-gradient(180deg, #FFFDFB 0%, #FFFFFF 100%);
}
.compare-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--sidebar-bg);
  color: var(--text-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 20px;
}
.compare-card-accent .compare-icon { background: var(--accent); color: #fff; }
.compare-card h3 {
  font-size: 21px;
  color: var(--text-deep);
  margin-bottom: 14px;
  font-weight: 700;
}
.compare-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.compare-card ul li {
  padding-left: 24px;
  position: relative;
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}
.compare-card ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}
.compare-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--text-weak);
  background: var(--bg);
  border-radius: 999px;
  padding: 4px 14px;
}

.steps-section { background: var(--bg); }
.steps-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  margin-top: 20px;
}
.steps-row::before {
  content: "";
  position: absolute;
  top: 47px;
  left: 14%;
  right: 14%;
  border-top: 1px dashed #C3D7E8;
  z-index: 0;
}
.step-item {
  text-align: center;
  padding: 24px 14px;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--text-deep);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  margin: 0 auto 18px;
  border: 3px solid #fff;
  box-shadow: 0 4px 14px rgba(21,44,71,0.16);
}
.step-item.current .step-num { background: var(--accent); }
.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-deep);
  margin-bottom: 10px;
}
.step-item p {
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.7;
}

.progress-section { background: #fff; }
.progress-panel {
  background: #F0F6FC;
  border-radius: 20px;
  padding: 40px 44px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}
.progress-panel-left .section-tag { margin-bottom: 10px; }
.progress-panel h2 {
  font-size: 28px;
  color: var(--text-deep);
  margin-bottom: 10px;
  font-weight: 800;
}
.progress-panel p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  margin-bottom: 24px;
}
.progress-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-deep);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 13px;
  color: var(--text-weak);
}
.progress-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 30px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
}
.progress-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-deep);
}
.progress-card-top em {
  font-style: normal;
  background: rgba(255,122,69,0.12);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}
.progress-bar {
  height: 8px;
  background: #E1EAF3;
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 16px;
}
.progress-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #FFA07A);
  border-radius: 99px;
  transition: width 0.6s ease;
}
.progress-card p {
  font-size: 13px;
  color: var(--text-weak);
  margin: 0;
}

.tip-section { background: var(--bg); }
.tip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.tip-image img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
}
.tip-content .section-tag { margin-bottom: 10px; }
.tip-content h2 {
  font-size: 28px;
  color: var(--text-deep);
  font-weight: 800;
  margin-bottom: 16px;
}
.tip-content ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.tip-content ul li {
  padding-left: 28px;
  position: relative;
  font-size: 14px;
  color: var(--text);
  line-height: 1.8;
}
.tip-content ul li::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.faq-section { background: #fff; }
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border-radius: 12px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: var(--card-shadow); }
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 24px;
  height: 52px;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-deep);
  cursor: pointer;
  text-align: left;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--accent); }
.faq-icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform 0.3s;
  border-radius: 2px;
}
.faq-icon::before {
  left: 1px;
  right: 1px;
  top: 7px;
  height: 2px;
}
.faq-icon::after {
  top: 1px;
  bottom: 1px;
  left: 7px;
  width: 2px;
}
.faq-item.active .faq-icon::after { transform: scaleY(0); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.active .faq-answer {
  max-height: 260px;
  background: #F7FAFD;
  border-top: 1px solid var(--border);
}
.faq-answer p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  padding: 4px 24px 20px;
}

.cta-section { background: var(--bg); }
.cta-box {
  background: linear-gradient(135deg, #152C47 0%, #1E3A5F 100%);
  border-radius: 20px;
  padding: 72px 48px;
  text-align: center;
  color: #fff;
}
.cta-box h2 {
  font-size: 32px;
  color: #fff;
  font-weight: 800;
  margin-bottom: 12px;
}
.cta-box p {
  font-size: 15px;
  color: #B6C8DC;
  margin-bottom: 28px;
}

.site-footer {
  background: var(--text-deep);
  color: #B6C8DC;
  padding: 56px 64px 24px;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
}
.footer-brand .brand { padding: 0; margin-bottom: 16px; }
.footer-brand .brand__icon {
  width: 38px;
  height: 38px;
  font-size: 18px;
}
.footer-brand .brand__text { font-size: 20px; color: #fff; }
.footer-brand p {
  font-size: 13px;
  line-height: 1.9;
  color: #8FA9C5;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col a,
.footer-col span {
  color: #8FA9C5;
  font-size: 13px;
  text-decoration: none;
  transition: color 0.2s;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  max-width: 1280px;
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: #6C8AA6;
}

@media (max-width: 1024px) {
  .mobile-topbar {
    display: flex;
    position: sticky;
    top: 0;
    z-index: 1100;
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
  }
  .mobile-brand { display: flex; align-items: center; gap: 8px; }
  .mobile-brand .brand__icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--text-deep);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 17px;
    font-weight: 800;
  }
  .mobile-brand .brand__text {
    font-size: 19px;
    font-weight: 800;
    color: var(--text-deep);
  }
  .hamburger {
    width: 40px;
    height: 40px;
    background: none;
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
  }
  .hamburger span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-deep);
    border-radius: 2px;
    transition: transform 0.3s;
  }
  .hamburger:hover { border-color: var(--accent); }
  .sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 0 0 40px rgba(21,44,71,0.18);
  }
  .sidebar-overlay.show {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(21,44,71,0.35);
    z-index: 1050;
    backdrop-filter: blur(2px);
  }
  .main-content { margin-left: 0; }
  .site-footer { padding: 40px 32px 24px; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 24px; }
  .reward-hero {
    min-height: 360px;
    padding: 48px 0;
    text-align: center;
  }
  .reward-hero h1 { font-size: 30px; }
  .reward-hero p { font-size: 15px; margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .compare-grid { grid-template-columns: 1fr; gap: 20px; }
  .steps-row { grid-template-columns: 1fr 1fr; gap: 16px; }
  .steps-row::before { display: none; }
  .step-item { padding: 16px 8px; }
  .progress-panel { grid-template-columns: 1fr; padding: 28px 24px; gap: 28px; }
  .progress-stats { gap: 24px; }
  .stat-num { font-size: 26px; }
  .tip-grid { grid-template-columns: 1fr; gap: 24px; }
  .tip-content h2 { font-size: 24px; }
  .faq-question { font-size: 15px; }
  .cta-box { padding: 48px 24px; }
  .cta-box h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
}

@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .steps-row { grid-template-columns: 1fr; }
  .step-item { display: flex; align-items: flex-start; text-align: left; gap: 16px; }
  .step-num { margin: 0; flex-shrink: 0; }
  .compare-card { padding: 24px; }
  .progress-panel { padding: 20px 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 8px; }
  .hero-actions .btn { width: 100%; }
}