/* roulang page: index */
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px; line-height: 1.75; color: #1C1C1A; background: #FAF7F2;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .25s ease; }
ul, ol { list-style: none; }
button, input { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; }
input[type="search"]::-webkit-search-decoration,
input[type="search"]::-webkit-search-cancel-button { -webkit-appearance: none; }

:root {
  --color-primary: #14534F;
  --color-primary-dark: #0E3A38;
  --color-primary-soft: #E4EEEC;
  --color-accent: #C6A45B;
  --color-accent-dark: #A8873F;
  --color-accent-soft: #F5EEDD;
  --color-bg: #FAF7F2;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F0EAE0;
  --color-text: #1C1C1A;
  --color-text-muted: #63635E;
  --color-border: #E5E0D8;
  --color-success: #2E7D5B;
  --color-error: #B33A3A;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(28,28,26,0.06);
  --shadow-hover: 0 8px 24px rgba(28,28,26,0.08);
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif;
  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --spacer: 96px;
}

/* ===== Container ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--spacer) 0; }

/* ===== JS fade-in ===== */
.js .fade-in-up { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.js .fade-in-up.visible { opacity: 1; transform: translateY(0); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 15px; line-height: 1;
  padding: 0 28px; height: 48px; border-radius: 10px; cursor: pointer;
  transition: all .25s ease; white-space: nowrap;
}
.btn-primary { background: var(--color-accent); color: #1C1C1A; }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(198,164,91,0.3); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: var(--color-primary); border: 1px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary-soft); transform: translateY(-1px); }
.btn-outline:active { transform: translateY(0); }
.btn-white { background: var(--color-accent); color: #1C1C1A; }
.btn-white:hover { background: var(--color-accent-dark); transform: translateY(-1px); }
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.btn-lg { height: 56px; padding: 0 36px; font-size: 16px; }
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }

/* ===== Header ===== */
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(250,247,242,0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: all .3s ease; }
.site-header .header-top { border-bottom: 1px solid rgba(229,224,216,0.8); transition: all .3s ease; }
.site-header .header-top-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.site-header .header-bottom { border-bottom: 1px solid var(--color-border); transition: all .3s ease; }
.site-header.is-sticky .header-bottom { display: none; }
.site-header.is-sticky .header-top { box-shadow: 0 2px 12px rgba(28,28,26,0.06); }
.site-header.is-sticky .header-top-inner { height: 56px; }

.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 36px; height: 36px; border-radius: 9px; background: var(--color-primary);
  color: #fff; font-size: 16px; font-weight: 700; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); box-shadow: 0 2px 8px rgba(20,83,79,0.25);
}
.logo-text { font-family: var(--font-serif); font-size: 22px; font-weight: 700; letter-spacing: 0.01em; color: var(--color-primary); }
.logo-text .logo-dark { color: #1C1C1A; }
.logo:hover .logo-mark { background: var(--color-primary-dark); }

.header-search { display: flex; align-items: center; flex: 0 1 320px; min-width: 200px; }
.header-search form { display: flex; width: 100%; }
.header-search input {
  flex: 1; height: 40px; padding: 0 14px; border: 1px solid var(--color-border);
  border-radius: 10px 0 0 10px; background: #fff; font-size: 14px; color: var(--color-text);
  transition: border-color .25s ease, box-shadow .25s ease;
}
.header-search input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(20,83,79,0.12); }
.header-search button {
  width: 44px; height: 40px; background: var(--color-primary); color: #fff; border-radius: 0 10px 10px 0;
  font-size: 20px; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: background .25s ease;
}
.header-search button:hover { background: var(--color-primary-dark); }

.header-hot { display: flex; align-items: center; gap: 18px; flex-shrink: 0; }
.header-hot a { font-size: 13px; color: var(--color-text-muted); transition: color .25s ease; }
.header-hot a:hover { color: var(--color-primary); }

.btn-header { height: 36px; padding: 0 18px; font-size: 13px; border-radius: 8px; background: var(--color-primary); color: #fff; }
.btn-header:hover { background: var(--color-primary-dark); transform: translateY(-1px); }

.header-bottom-inner { display: flex; align-items: center; height: 44px; overflow-x: auto; scrollbar-width: none; }
.header-bottom-inner::-webkit-scrollbar { display: none; }
.main-nav { display: flex; align-items: center; gap: 32px; }
.nav-link { font-size: 15px; font-weight: 500; color: var(--color-text); position: relative; padding: 12px 0 10px; white-space: nowrap; }
.nav-link::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
  background: var(--color-primary); transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
.nav-link:hover { color: var(--color-primary); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--color-primary); font-weight: 600; }
.nav-link.active::after { transform: scaleX(1); }

/* ===== Hero ===== */
.hero { position: relative; overflow: hidden; background-image: linear-gradient(90deg, rgba(250,247,242,0.97) 0%, rgba(250,247,242,0.82) 45%, rgba(250,247,242,0.25) 100%), url('/assets/images/backpic/back-1.webp'); background-size: cover; background-position: center right; padding: 96px 0 72px; }
.hero-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px; letter-spacing: 0.08em;
  color: var(--color-primary); background: rgba(228,238,236,0.8); border: 1px solid rgba(20,83,79,0.2);
  padding: 4px 14px; border-radius: 999px; margin-bottom: 24px; font-weight: 500;
}
.hero-badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); }
.hero-title {
  font-family: var(--font-serif); font-size: 52px; font-weight: 700; line-height: 1.25; letter-spacing: 0.01em;
  color: var(--color-text); margin-bottom: 20px; max-width: 680px;
}
.hero-title .hero-brand-primary { color: var(--color-primary); }
.hero-subtitle { font-size: 18px; line-height: 1.8; color: var(--color-text-muted); max-width: 540px; margin-bottom: 40px; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 56px; }
.hero-facts { display: flex; gap: 0; border-top: 1px solid rgba(229,224,216,0.9); padding-top: 28px; max-width: 600px; }
.hero-fact { flex: 1; padding-left: 20px; border-left: 1px solid var(--color-border); }
.hero-fact:first-child { padding-left: 0; border-left: none; }
.hero-fact-number { font-family: var(--font-serif); font-size: 28px; font-weight: 700; color: var(--color-primary); line-height: 1.2; }
.hero-fact-label { font-size: 13px; color: var(--color-text-muted); margin-top: 4px; }
.hero-watermark {
  position: absolute; right: 5%; bottom: 5%; font-family: var(--font-serif);
  font-size: 320px; font-weight: 700; line-height: 1; color: var(--color-primary);
  opacity: 0.06; pointer-events: none; z-index: 0;
}

/* ===== News Section ===== */
.news-section { background: var(--color-bg); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 40px; flex-wrap: wrap; }
.section-label { font-size: 12px; font-weight: 600; letter-spacing: 0.12em; color: var(--color-accent); text-transform: uppercase; margin-bottom: 8px; display: block; }
.section-title { font-family: var(--font-serif); font-size: 32px; font-weight: 700; color: var(--color-text); line-height: 1.3; }
.section-desc { font-size: 15px; color: var(--color-text-muted); margin-top: 12px; max-width: 560px; }
.section-more { font-size: 14px; color: var(--color-primary); font-weight: 500; display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border: 1px solid var(--color-border); border-radius: 999px; transition: all .25s ease; }
.section-more:hover { border-color: var(--color-primary); background: var(--color-primary-soft); }

.news-feature {
  display: flex; gap: 32px; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 24px;
  box-shadow: var(--shadow-sm); transition: box-shadow .25s ease, transform .25s ease;
}
.news-feature:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.news-feature-media { flex: 0 0 42%; min-height: 260px; overflow: hidden; }
.news-feature-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.news-feature:hover .news-feature-media img { transform: scale(1.03); }
.news-feature-body { flex: 1; padding: 32px 32px 24px; display: flex; flex-direction: column; }
.news-feature-body h3 { font-family: var(--font-serif); font-size: 24px; font-weight: 700; margin: 12px 0 12px; line-height: 1.4; }
.news-feature-body h3 a:hover { color: var(--color-primary); }
.news-feature-body p { font-size: 15px; color: var(--color-text-muted); flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.badge { display: inline-block; font-size: 12px; font-weight: 600; padding: 3px 12px; border-radius: 999px; line-height: 1.6; }
.badge-accent { background: var(--color-accent-soft); color: var(--color-accent-dark); }
.badge-primary { background: var(--color-primary); color: #fff; }
.badge-outline { background: transparent; border: 1px solid var(--color-accent); color: var(--color-primary); }

.news-meta { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 16px; font-size: 13px; color: var(--color-text-muted); }
.news-meta a { color: var(--color-primary); font-weight: 500; }
.news-meta a:hover { color: var(--color-primary-dark); }

.news-grid-cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: all .25s ease; display: flex; flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.news-card-media { overflow: hidden; aspect-ratio: 16/9; background: var(--color-surface-soft); }
.news-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.news-card:hover .news-card-media img { transform: scale(1.04); }
.news-card-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.news-card-body h4 { font-size: 18px; font-weight: 600; line-height: 1.5; margin: 10px 0 10px; font-family: var(--font-serif); }
.news-card-body h4 a:hover { color: var(--color-primary); }
.news-card-body p { font-size: 14px; color: var(--color-text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.news-card .news-meta { margin-top: 14px; }

.news-empty {
  border: 1px dashed var(--color-border); border-radius: var(--radius-lg); padding: 64px 24px;
  text-align: center; background: rgba(255,255,255,0.5);
}
.news-empty-icon { font-size: 40px; color: var(--color-text-muted); opacity: 0.4; display: block; margin-bottom: 16px; }
.news-empty p { font-size: 16px; color: var(--color-text); font-weight: 500; margin-bottom: 6px; }
.news-empty span { font-size: 14px; color: var(--color-text-muted); }

/* ===== Comparison Section ===== */
.comparison-section { background: var(--color-surface); }
.compare-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: #fff; }
.compare-table { width: 100%; min-width: 640px; border-collapse: collapse; }
.compare-table th, .compare-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--color-border); font-size: 15px; }
.compare-table th { font-weight: 600; background: var(--color-primary-soft); color: var(--color-primary-dark); }
.compare-table th:first-child { width: 34%; }
.compare-table th:nth-child(2) { width: 25%; }
.compare-table td { color: var(--color-text-muted); }
.compare-table td:first-child { color: var(--color-text); font-weight: 500; }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table tbody tr:hover td { background: var(--color-bg); }
.compare-table .member-col { background: var(--color-accent-soft); border-left: 3px solid var(--color-accent); color: var(--color-text); font-weight: 500; }
.compare-table .member-col-pos { position: relative; }
.compare-table .recommend-tag {
  display: inline-block; background: var(--color-primary); color: #fff; font-size: 11px; font-weight: 600;
  padding: 2px 10px; border-radius: 999px; margin-left: 8px; vertical-align: middle;
}
.compare-table .member-head { background: var(--color-primary); color: #fff; border: none; }
.compare-foot { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 24px; flex-wrap: wrap; }
.compare-note { font-size: 14px; color: var(--color-text-muted); display: inline-flex; align-items: center; gap: 8px; }
.compare-note::before { content: '✓'; width: 20px; height: 20px; background: var(--color-success); color: #fff; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 12px; flex-shrink: 0; }

/* ===== Levels Section ===== */
.levels-section { background: var(--color-bg); }
.levels-section .section-head { margin-bottom: 56px; }
.level-timeline { position: relative; display: flex; justify-content: space-between; gap: 24px; padding-top: 48px; }
.level-line { position: absolute; top: 4px; left: 0; right: 0; height: 1px; background: var(--color-border); }
.level-node { flex: 1; position: relative; padding-top: 24px; max-width: 320px; }
.level-dot {
  position: absolute; top: -29px; left: 0; width: 12px; height: 12px; border-radius: 50%;
  background: var(--color-primary); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--color-primary);
}
.level-node.featured .level-dot {
  width: 18px; height: 18px; top: -32px; border: 4px solid var(--color-accent);
  box-shadow: 0 0 0 3px rgba(198,164,91,0.4), 0 0 0 6px rgba(198,164,91,0.12); background: var(--color-accent);
}
.level-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 24px; box-shadow: var(--shadow-sm); transition: all .25s ease; position: relative;
}
.level-node:hover .level-card { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.level-node.featured .level-card { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.level-card::before {
  content: ''; position: absolute; top: 0; left: 24px; width: 60px; height: 2px; background: var(--color-accent); opacity: 0;
  transition: opacity .25s ease;
}
.level-node:hover .level-card::before { opacity: 1; }
.level-badge {
  position: absolute; top: -10px; right: 16px; background: var(--color-accent); color: #1C1C1A;
  font-size: 11px; font-weight: 600; padding: 2px 10px; border-radius: 999px;
}
.level-name { font-family: var(--font-serif); font-size: 20px; font-weight: 700; display: block; margin-bottom: 6px; }
.level-condition { font-size: 13px; color: var(--color-text-muted); display: block; margin-bottom: 14px; }
.level-node.featured .level-condition { color: rgba(255,255,255,0.8); }
.level-perks { margin-top: 12px; }
.level-perks li { font-size: 14px; color: var(--color-text-muted); padding: 4px 0 4px 16px; position: relative; }
.level-perks li::before { content: ''; position: absolute; left: 0; top: 13px; width: 6px; height: 6px; background: var(--color-accent); }
.level-node.featured .level-perks li { color: rgba(255,255,255,0.9); }
.level-node.featured .level-perks li::before { background: var(--color-accent); }

/* ===== Preview Section ===== */
.preview-section { background: var(--color-surface-soft); }
.preview-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 32px; align-items: start; }
.preview-card {
  position: relative; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow .25s ease;
}
.preview-card:hover { box-shadow: var(--shadow-hover); }
.preview-media { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.preview-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.preview-card:hover .preview-media img { transform: scale(1.02); }
.preview-lock {
  position: absolute; inset: 0; background: rgba(20,83,79,0.15); display: flex; align-items: center;
  justify-content: center; transition: background .3s ease;
}
.preview-lock::before {
  content: '🔒'; font-size: 36px; background: rgba(255,255,255,0.92); width: 64px; height: 64px;
  border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(28,28,26,0.15);
  transition: transform .25s ease;
}
.preview-card:hover .preview-lock { background: rgba(20,83,79,0.3); }
.preview-card:hover .preview-lock::before { transform: scale(1.05); }
.preview-lock-tip {
  position: absolute; bottom: 0; left: 0; right: 0; background: rgba(20,83,79,0.82); color: #fff;
  text-align: center; padding: 10px; font-size: 13px; backdrop-filter: blur(4px);
}
.preview-tag {
  position: absolute; top: 16px; right: 16px; z-index: 2; background: rgba(198,164,91,0.95);
  color: #1C1C1A; font-size: 12px; font-weight: 600; padding: 4px 14px; border-radius: 999px; backdrop-filter: blur(4px);
}
.preview-card-body { padding: 24px; }
.preview-card-body h3 { font-family: var(--font-serif); font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.preview-card-body p { font-size: 14px; color: var(--color-text-muted); margin-bottom: 16px; }
.preview-meta { display: flex; gap: 16px; font-size: 13px; color: var(--color-text-muted); }

.preview-list { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 28px; }
.preview-list-title { font-family: var(--font-serif); font-size: 18px; font-weight: 700; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--color-border); }
.preview-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--color-border); }
.preview-item:last-child { border-bottom: none; }
.preview-num { font-family: var(--font-serif); font-size: 20px; font-weight: 700; color: var(--color-accent); line-height: 1.2; min-width: 32px; }
.preview-item-body h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.preview-item-body p { font-size: 13px; color: var(--color-text-muted); }
.preview-link { display: inline-block; margin-top: 20px; font-size: 14px; color: var(--color-primary); font-weight: 500; }
.preview-link:hover { text-decoration: underline; }

/* ===== FAQ Section ===== */
.faq-section { background: var(--color-surface); }
.faq-section .section-head { text-align: center; justify-content: center; flex-direction: column; align-items: center; }
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item:first-child { border-top: 1px solid var(--color-border); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 4px; cursor: pointer; font-size: 17px; font-weight: 500; color: var(--color-text);
  transition: background .25s ease, color .25s ease; border-left: 3px solid transparent;
}
.faq-question:hover { background: var(--color-bg); color: var(--color-primary); }
.faq-question .faq-icon { position: relative; width: 20px; height: 20px; flex-shrink: 0; }
.faq-question .faq-icon::before, .faq-question .faq-icon::after {
  content: ''; position: absolute; background: var(--color-primary); border-radius: 2px; transition: transform .25s ease;
}
.faq-question .faq-icon::before { top: 9px; left: 0; width: 20px; height: 2px; }
.faq-question .faq-icon::after { top: 0; left: 9px; width: 2px; height: 20px; }
.faq-item.open .faq-question { border-left-color: var(--color-primary); color: var(--color-primary); }
.faq-item.open .faq-icon::after { transform: scaleY(0); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
}
.faq-answer-inner { padding: 0 24px 20px 4px; font-size: 15px; color: var(--color-text-muted); line-height: 1.8; }

/* ===== CTA Section ===== */
.cta-section { background: var(--color-primary); position: relative; overflow: hidden; padding: 88px 0; }
.cta-section::before {
  content: '365'; position: absolute; right: 6%; top: 50%; transform: translateY(-50%);
  font-family: var(--font-serif); font-size: 360px; font-weight: 700; line-height: 1;
  color: #fff; opacity: 0.04; pointer-events: none;
}
.cta-inner { position: relative; z-index: 2; text-align: center; max-width: 680px; margin: 0 auto; padding: 0 24px; }
.cta-line { width: 60px; height: 2px; background: var(--color-accent); margin: 0 auto 24px; }
.cta-title { font-family: var(--font-serif); font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.cta-desc { font-size: 16px; color: rgba(255,255,255,0.85); margin-bottom: 36px; line-height: 1.7; }
.cta-actions { display: flex; justify-content: center; gap: 16px; }

/* ===== Footer ===== */
.site-footer { background: var(--color-primary-dark); color: rgba(255,255,255,0.82); }
.footer-top { border-top: 1px solid var(--color-accent); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; padding: 64px 0 48px; }
.footer-brand .logo-text { color: #fff; font-size: 24px; }
.footer-brand .logo-text .logo-dark { color: rgba(255,255,255,0.95); }
.footer-brand .logo-mark { background: var(--color-accent); color: var(--color-primary-dark); }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.65); margin-top: 16px; max-width: 280px; line-height: 1.7; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; color: rgba(255,255,255,0.7); transition: all .25s ease; }
.footer-col ul a:hover { color: var(--color-accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding: 24px 0; }
.footer-bottom-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-copy { font-size: 13px; color: rgba(255,255,255,0.5); }
.footer-icp { font-size: 13px; color: rgba(255,255,255,0.5); }

/* ===== Back to top ===== */
.to-top {
  position: fixed; bottom: 24px; right: 24px; width: 40px; height: 40px; border-radius: 50%;
  background: var(--color-surface); border: 1px solid var(--color-border); box-shadow: var(--shadow-sm);
  color: var(--color-primary); font-size: 18px; display: flex; align-items: center; justify-content: center;
  z-index: 999; opacity: 0; pointer-events: none; transition: all .3s ease;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { background: var(--color-primary); color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .container { max-width: 100%; }
  .hero-title { font-size: 46px; }
}

@media (max-width: 992px) {
  :root { --spacer: 72px; }
  .hero { padding: 72px 0 56px; }
  .hero-title { font-size: 40px; }
  .news-feature { flex-direction: column; }
  .news-feature-media { flex: none; min-height: 0; aspect-ratio: 16/8; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .preview-grid { grid-template-columns: 1fr; }
  .level-timeline { flex-direction: column; padding-top: 0; gap: 32px; }
  .level-line { display: none; }
  .level-node { max-width: 100%; padding-top: 0; }
  .level-dot, .level-node.featured .level-dot { top: -8px; left: -4px; }
  .level-card { margin-left: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .header-hot { display: none; }
}

@media (max-width: 768px) {
  :root { --spacer: 56px; }
  .container { padding: 0 16px; }
  .header-search { flex: 0 1 200px; }
  .section-title { font-size: 26px; }
  .section-head { margin-bottom: 32px; }
  .news-grid-cols { grid-template-columns: 1fr; }
  .hero-facts { flex-wrap: wrap; gap: 16px; }
  .hero-fact { flex: 1 1 30%; }
  .compare-foot { flex-direction: column; align-items: flex-start; }
  .cta-title { font-size: 30px; }
  .cta-actions { flex-direction: column; align-items: center; }
  .btn-lg { width: 100%; max-width: 360px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 32px; }
}

@media (max-width: 576px) {
  .header-top-inner { height: 56px; gap: 10px; }
  .logo-mark { width: 30px; height: 30px; font-size: 14px; }
  .logo-text { font-size: 18px; }
  .header-search { flex: 0 1 auto; min-width: 0; }
  .header-search input { display: none; }
  .header-search button { border-radius: 10px; width: 38px; background: transparent; color: var(--color-primary); font-size: 20px; }
  .header-search button:hover { background: var(--color-primary-soft); }
  .btn-header { height: 32px; padding: 0 12px; font-size: 12px; }
  .hero { padding: 48px 0 40px; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; margin-bottom: 28px; }
  .hero-actions { flex-direction: column; gap: 12px; margin-bottom: 40px; }
  .hero-actions .btn { width: 100%; }
  .hero-facts { padding-top: 20px; }
  .hero-fact-number { font-size: 22px; }
  .news-feature-body { padding: 20px; }
  .news-feature-body h3 { font-size: 20px; }
  .preview-card-body { padding: 16px; }
  .preview-list { padding: 20px; }
  .faq-question { font-size: 15px; }
  .cta-section { padding: 56px 0; }
  .cta-title { font-size: 26px; }
  .to-top { bottom: 16px; right: 16px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --color-primary: #14534F;
  --color-primary-dark: #0E3A38;
  --color-primary-soft: #E4EEEC;
  --color-accent: #C6A45B;
  --color-accent-dark: #A8873F;
  --color-accent-soft: #F5EEDD;
  --color-bg: #FAF7F2;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F0EAE0;
  --color-text: #1C1C1A;
  --color-text-muted: #63635E;
  --color-border: #E5E0D8;
  --color-success: #2E7D5B;
  --color-error: #B33A3A;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(28, 28, 26, 0.06);
  --shadow-hover: 0 8px 24px rgba(28, 28, 26, 0.08);
  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif;
  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --container-max: 1200px;
  --section-gap: 96px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover {
  color: var(--color-primary-dark);
}

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: var(--font-sans);
}

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

section {
  padding: 64px 0;
}

/* ===== 吸顶导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 2px 16px rgba(28, 28, 26, 0.06);
}

.header-top-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 64px;
  flex-wrap: wrap;
}

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

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  border-radius: 10px;
  letter-spacing: 0.02em;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.logo-dark {
  color: var(--color-text);
}

.header-search {
  flex: 1;
  max-width: 320px;
  margin-left: auto;
}

.header-search form {
  display: flex;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-surface);
  transition: border-color 0.25s, box-shadow 0.25s;
}

.header-search form:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(20, 83, 79, 0.15);
}

.header-search input {
  flex: 1;
  border: none;
  outline: none;
  padding: 0 14px;
  font-size: 14px;
  color: var(--color-text);
  background: transparent;
}

.header-search input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.header-search button {
  width: 44px;
  background: var(--color-primary);
  color: #fff;
  font-size: 20px;
  font-weight: 300;
  transition: background 0.25s;
}

.header-search button:hover {
  background: var(--color-primary-dark);
}

.header-hot {
  display: flex;
  gap: 14px;
  align-items: center;
  white-space: nowrap;
}

.header-hot a {
  font-size: 13px;
  color: var(--color-text-muted);
  transition: color 0.25s;
}

.header-hot a:hover {
  color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-sm);
  padding: 12px 28px;
  transition: all 0.25s ease;
  line-height: 1.4;
}

.btn-header {
  padding: 8px 20px;
  font-size: 14px;
  background: var(--color-accent);
  color: var(--color-text);
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-header:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

.header-bottom {
  border-top: 1px solid rgba(229, 224, 216, 0.6);
}

.header-bottom-inner {
  display: flex;
  align-items: center;
  min-height: 44px;
}

.main-nav {
  display: flex;
  gap: 32px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x proximity;
  padding: 4px 0;
}

.main-nav::-webkit-scrollbar {
  display: none;
}

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 8px 0;
  white-space: nowrap;
  scroll-snap-align: start;
  transition: color 0.25s;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.25s ease;
}

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

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

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

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

.nav-link.active::before {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

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

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

.breadcrumb .sep {
  color: var(--color-border);
  font-weight: 300;
}

.breadcrumb .current {
  color: var(--color-primary);
  font-weight: 500;
}

/* ===== 页面标题区 ===== */
.page-hero {
  padding: 48px 0 24px;
  background: var(--color-bg);
}

.page-hero-inner {
  max-width: 800px;
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: 0.01em;
  margin-bottom: 16px;
}

.page-hero .desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-muted);
  text-align: justify;
  max-width: 720px;
}

/* ===== 锚点子导航 ===== */
.anchor-nav {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 24px;
  margin-top: 28px;
  box-shadow: var(--shadow-sm);
}

.anchor-nav-inner {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  align-items: center;
}

.anchor-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.25s, border-color 0.25s;
}

.anchor-nav a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

/* ===== 章节区块通用 ===== */
.chapter {
  padding: 48px 0;
  border-bottom: 1px solid rgba(229, 224, 216, 0.5);
}

.chapter:last-of-type {
  border-bottom: none;
}

.chapter + .chapter {
  border-top: 1px solid rgba(229, 224, 216, 0.5);
}

.chapter-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.chapter-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: 16px;
}

.chapter-desc {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.75;
  max-width: 680px;
  margin-bottom: 32px;
}

/* ===== 图文章节 ===== */
.chapter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.chapter-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background: var(--color-surface-soft);
  aspect-ratio: 4/3;
  position: relative;
}

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

.chapter-media:hover img {
  transform: scale(1.02);
}

.chapter-media .media-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(20, 83, 79, 0.85);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

.chapter-content h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  line-height: 1.4;
}

.chapter-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  text-align: justify;
}

.chapter-content ul {
  margin: 16px 0;
}

.chapter-content ul li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text);
  margin-bottom: 8px;
}

.chapter-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.featured-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.featured-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow 0.25s, transform 0.25s;
}

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

.featured-item .num {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
  min-width: 32px;
  line-height: 1.3;
}

.featured-item .item-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.featured-item .item-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== 内容范围卡片 ===== */
.range-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.range-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow 0.25s, transform 0.25s;
  position: relative;
  overflow: hidden;
}

.range-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity 0.25s;
}

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

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

.range-card .card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.range-card h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.range-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  text-align: justify;
}

/* ===== 阅读方式步骤 ===== */
.steps-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.step-item {
  position: relative;
  text-align: left;
  padding-top: 44px;
}

.step-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-border);
}

.step-item::after {
  content: '';
  position: absolute;
  top: -5px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
}

.step-item .step-num {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 10px;
}

.step-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-section {
  max-width: 800px;
  margin: 0 auto;
  padding: 64px 0;
}

.faq-section .section-head {
  text-align: center;
  margin-bottom: 40px;
}

.faq-section .section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.faq-section .section-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.faq-list {
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 4px;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background 0.25s;
  border-left: 3px solid transparent;
}

.faq-question:hover {
  background: var(--color-bg);
  border-left-color: var(--color-primary);
}

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-primary);
  transition: transform 0.25s;
  font-weight: 300;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

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

.faq-answer-inner {
  padding: 0 4px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-muted);
  border-left: 3px solid transparent;
  text-align: justify;
}

/* ===== 转化条 ===== */
.category-cta {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin: 32px 0 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-sm);
}

.category-cta h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.category-cta p {
  font-size: 15px;
  color: var(--color-text-muted);
  max-width: 560px;
}

.category-cta .btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text);
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s;
}

.btn-outline:hover {
  background: var(--color-primary-soft);
  transform: translateY(-1px);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  border-top: 2px solid var(--color-accent);
}

.footer-top {
  padding: 64px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

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

.footer-brand .logo-mark {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}

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

.footer-brand .logo-dark {
  color: rgba(255, 255, 255, 0.5);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
  margin-top: 12px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
}

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

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.25s, padding-left 0.25s;
}

.footer-col ul a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

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

.footer-icp {
  color: rgba(255, 255, 255, 0.4);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root {
    --section-gap: 72px;
  }

  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .header-top-inner {
    gap: 12px;
  }

  .header-search {
    max-width: 240px;
  }

  .header-hot {
    display: none;
  }

  .chapter-grid {
    gap: 32px;
  }

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

  .steps-wrapper {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 56px;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-header.scrolled .header-top {
    min-height: 56px;
  }

  .header-top-inner {
    min-height: 56px;
  }

  .logo-mark {
    width: 32px;
    height: 32px;
    font-size: 15px;
    border-radius: 8px;
  }

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

  .header-search {
    max-width: 180px;
  }

  .btn-header {
    padding: 6px 14px;
    font-size: 13px;
  }

  .main-nav {
    gap: 24px;
    padding: 2px 0;
  }

  .nav-link {
    font-size: 14px;
    padding: 6px 0;
  }

  .page-hero {
    padding: 32px 0 16px;
  }

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

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

  .anchor-nav {
    padding: 12px 16px;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    border-radius: var(--radius-sm);
  }

  .anchor-nav::-webkit-scrollbar {
    display: none;
  }

  .anchor-nav-inner {
    flex-wrap: nowrap;
    gap: 20px;
    width: max-content;
  }

  .chapter {
    padding: 40px 0;
  }

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

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

  .chapter-media {
    aspect-ratio: 16/9;
  }

  .range-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  .step-item {
    padding-top: 36px;
  }

  .faq-section {
    padding: 48px 0;
  }

  .faq-question {
    font-size: 15px;
    padding: 16px 2px;
  }

  .category-cta {
    padding: 28px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .btn-group {
    width: 100%;
  }

  .btn-primary, .btn-outline {
    flex: 1;
    justify-content: center;
  }

  .footer-top {
    padding: 48px 0 24px;
  }

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

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

@media (max-width: 520px) {
  .header-top-inner {
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 8px;
    padding-bottom: 8px;
  }

  .logo-mark {
    width: 30px;
    height: 30px;
    font-size: 14px;
  }

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

  .header-search {
    order: 3;
    max-width: 100%;
    flex: 0 0 100%;
  }

  .header-search form {
    height: 36px;
  }

  .btn-header {
    margin-left: auto;
  }

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

  .page-hero .desc {
    font-size: 14px;
  }

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

  .chapter-content p {
    font-size: 14px;
  }

  .featured-item {
    padding: 14px 16px;
  }

  .range-card {
    padding: 24px 20px;
  }

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

  .category-cta h3 {
    font-size: 20px;
  }

  .btn-primary, .btn-outline {
    padding: 10px 20px;
    font-size: 14px;
  }
}

/* ===== 动效 ===== */
.fade-in-up {
  animation: fadeInUp 0.5s ease both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* focus 可访问性 */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* roulang page: article */
:root {
  --color-primary: #14534F;
  --color-primary-dark: #0E3A38;
  --color-primary-soft: #E4EEEC;
  --color-accent: #C6A45B;
  --color-accent-dark: #A8873F;
  --color-accent-soft: #F5EEDD;
  --color-bg: #FAF7F2;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F0EAE0;
  --color-text: #1C1C1A;
  --color-text-muted: #63635E;
  --color-border: #E5E0D8;
  --color-success: #2E7D5B;
  --color-error: #B33A3A;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(28,28,26,0.06);
  --shadow-hover: 0 8px 24px rgba(28,28,26,0.08);
  --font-serif: 'Noto Serif SC','Source Han Serif SC','Songti SC','SimSun',serif;
  --font-sans: 'Noto Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  color:var(--color-text);
  background:var(--color-bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--color-primary);text-decoration:none;transition:color .25s ease}
a:hover{color:var(--color-primary-dark)}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1400px;margin:0 auto;padding:0 24px}
.container-narrow{max-width:860px;margin:0 auto;padding:0 24px}
.container-read{max-width:760px;margin:0 auto;padding:0 24px}

.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(250,247,242,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--color-border);
}
.header-top{padding:10px 0;border-bottom:1px solid rgba(229,224,216,0.6)}
.header-top-inner{display:flex;align-items:center;gap:20px}
.logo{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-serif);
  font-weight:700;color:var(--color-primary);
  white-space:nowrap;line-height:1;
}
.logo-mark{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--color-primary);color:#fff;
  font-size:17px;font-weight:700;
  border-radius:8px;font-family:var(--font-sans);
  flex-shrink:0;
}
.logo-text{font-size:21px;letter-spacing:0.01em}
.logo-dark{color:var(--color-text)}
.header-search{flex:0 1 300px}
.header-search form{display:flex;align-items:center}
.header-search input{
  width:100%;height:40px;padding:0 14px;
  border:1px solid var(--color-border);border-right:none;
  border-radius:12px 0 0 12px;
  font-size:14px;background:var(--color-surface);
  color:var(--color-text);outline:none;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.header-search input:focus{
  border-color:var(--color-primary);
  box-shadow:0 0 0 3px rgba(20,83,79,0.12);
}
.header-search button{
  width:44px;height:40px;
  border:1px solid var(--color-border);border-left:none;
  border-radius:0 12px 12px 0;
  background:var(--color-primary);color:#fff;
  font-size:18px;line-height:1;
  display:inline-flex;align-items:center;justify-content:center;
  transition:background .25s ease;
}
.header-search button:hover{background:var(--color-primary-dark)}
.header-hot{display:flex;align-items:center;gap:16px;white-space:nowrap}
.header-hot a{font-size:13px;color:var(--color-text-muted);transition:color .25s ease}
.header-hot a:hover{color:var(--color-primary)}
.btn-header{
  margin-left:auto;
  padding:8px 18px;font-size:14px;
  border-radius:var(--radius-sm);
  background:var(--color-accent);color:#fff;
  border:none;font-weight:600;
  transition:background .25s ease, transform .25s ease;
}
.btn-header:hover{
  background:var(--color-accent-dark);
  color:#fff;transform:translateY(-1px);
}
.header-bottom{padding:0}
.main-nav{display:flex;align-items:center;gap:32px;height:44px}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;
  color:var(--color-text);
  padding:8px 2px;white-space:nowrap;
  transition:color .25s ease;
}
.nav-link::after{
  content:'';position:absolute;left:0;bottom:0;
  width:100%;height:2px;
  background:var(--color-primary);
  transform:scaleX(0);
  transition:transform .25s ease;
  transform-origin:left;
}
.nav-link:hover{color:var(--color-primary)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--color-primary);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}

.breadcrumb{
  padding:24px 0 8px;
  font-size:14px;
  color:var(--color-text-muted);
}
.breadcrumb-inner{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.breadcrumb a{color:var(--color-text-muted);transition:color .25s ease}
.breadcrumb a:hover{color:var(--color-primary)}
.breadcrumb .sep{color:var(--color-border);font-size:12px}
.breadcrumb .current{color:var(--color-text);max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-header{
  padding:40px 0 20px;
  text-align:center;
}
.article-meta{
  display:flex;align-items:center;justify-content:center;
  gap:16px;flex-wrap:wrap;
  margin-bottom:20px;
  font-size:14px;color:var(--color-text-muted);
}
.article-meta .badge{
  display:inline-block;
  padding:3px 14px;
  border-radius:999px;
  font-size:12px;font-weight:600;
  background:var(--color-accent-soft);
  color:var(--color-primary);
  letter-spacing:0.04em;
}
.article-meta .meta-sep{width:1px;height:12px;background:var(--color-border)}
.article-header h1{
  font-family:var(--font-serif);
  font-size:42px;line-height:1.3;
  font-weight:700;color:var(--color-text);
  letter-spacing:0.01em;
  margin-bottom:16px;
}
.article-summary{
  max-width:680px;margin:0 auto;
  font-size:16px;line-height:1.8;
  color:var(--color-text-muted);
  text-align:justify;
}
.article-cover{padding:16px 0 32px}
.article-cover .container-read{max-width:880px}
.article-cover img{
  width:100%;height:420px;
  object-fit:cover;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
}

.article-content{
  padding:24px 0 48px;
}
.article-body{
  max-width:760px;margin:0 auto;
  padding:16px 24px 40px;
  font-size:17px;line-height:1.8;
  color:var(--color-text);
}
.article-body p{margin-bottom:24px;text-align:justify}
.article-body h2{
  font-family:var(--font-serif);
  font-size:24px;font-weight:600;
  color:var(--color-primary);
  margin:40px 0 16px;
  letter-spacing:0.02em;
}
.article-body h3{
  font-size:20px;font-weight:600;
  color:var(--color-text);
  margin:32px 0 12px;
}
.article-body h4{
  font-size:17px;font-weight:600;
  color:var(--color-text);
  margin:24px 0 8px;
}
.article-body a{
  color:var(--color-primary);
  text-decoration:underline;
  text-underline-offset:2px;
}
.article-body a:hover{color:var(--color-primary-dark)}
.article-body img{
  border-radius:var(--radius-md);
  margin:24px 0;
}
.article-body blockquote{
  border-left:3px solid var(--color-primary);
  background:var(--color-primary-soft);
  padding:16px 24px;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  margin:24px 0;
  color:var(--color-text);
  font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body ul,.article-body ol{
  margin:16px 0 24px;
  padding-left:24px;
}
.article-body ul li,.article-body ol li{margin-bottom:8px}
.article-body ul li::marker{color:var(--color-primary)}
.article-body ol li::marker{color:var(--color-accent-dark);font-weight:600}
.article-body table{
  width:100%;border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
}
.article-body th{
  background:var(--color-primary-soft);
  color:var(--color-text);
  font-weight:600;
  padding:12px 16px;
  text-align:left;
  border:1px solid var(--color-border);
}
.article-body td{
  padding:12px 16px;
  border:1px solid var(--color-border);
}
.article-body tr:hover td{background:var(--color-bg)}

.article-not-found{
  text-align:center;
  padding:80px 0;
  max-width:760px;margin:0 auto;
}
.article-not-found h3{
  font-family:var(--font-serif);
  font-size:24px;
  color:var(--color-text);
  margin-bottom:12px;
}
.article-not-found p{
  color:var(--color-text-muted);
  margin-bottom:28px;
}
.btn-primary{
  display:inline-block;
  background:var(--color-primary);
  color:#fff;
  padding:12px 32px;
  border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;
  border:none;
  transition:background .25s ease, transform .25s ease, box-shadow .25s ease;
}
.btn-primary:hover{
  background:var(--color-primary-dark);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:var(--shadow-hover);
}
.btn-primary:focus-visible{
  outline:2px solid var(--color-accent);
  outline-offset:3px;
}

.article-tags{
  padding:24px 0 28px;
  border-top:1px solid var(--color-border);
}
.tags-row{
  display:flex;align-items:center;
  gap:10px;flex-wrap:wrap;
}
.tag-label{
  font-size:14px;
  color:var(--color-text-muted);
  margin-right:6px;
}
.tag{
  display:inline-block;
  padding:4px 14px;
  border-radius:999px;
  font-size:13px;
  background:var(--color-accent-soft);
  color:var(--color-primary);
  transition:background .25s ease, color .25s ease, transform .25s ease;
}
.tag:hover{
  background:var(--color-primary);
  color:#fff;
  transform:translateY(-1px);
}

.article-pager{
  padding:16px 0 32px;
  border-bottom:1px solid var(--color-border);
}
.pager-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  flex-wrap:wrap;
}
.pager-link{
  font-size:14px;
  color:var(--color-text-muted);
  transition:color .25s ease;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.pager-link:hover{color:var(--color-primary)}
.pager-link i{font-style:normal;font-size:16px;line-height:1}

.related-posts{
  padding:72px 0;
  background:var(--color-surface-soft);
}
.section-head{
  text-align:center;
  margin-bottom:40px;
}
.section-tag{
  display:inline-block;
  font-size:12px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--color-accent-dark);
  font-weight:600;
  margin-bottom:10px;
}
.section-head h2{
  font-family:var(--font-serif);
  font-size:32px;
  font-weight:600;
  color:var(--color-text);
  letter-spacing:0.01em;
}
.section-head .section-desc{
  font-size:15px;
  color:var(--color-text-muted);
  margin-top:10px;
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.related-card{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  padding:24px;
  box-shadow:var(--shadow-sm);
  display:flex;
  flex-direction:column;
  gap:10px;
  transition:transform .25s ease, box-shadow .25s ease;
}
.related-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.related-cat{
  font-size:12px;
  letter-spacing:0.06em;
  color:var(--color-accent-dark);
  font-weight:600;
}
.related-card h3{
  font-family:var(--font-serif);
  font-size:18px;
  font-weight:600;
  line-height:1.4;
  color:var(--color-text);
}
.related-card p{
  font-size:14px;
  color:var(--color-text-muted);
  line-height:1.6;
  flex:1;
}
.related-meta{
  font-size:13px;
  color:var(--color-text-muted);
  display:flex;
  align-items:center;
  gap:10px;
}
.related-link{
  font-size:14px;
  font-weight:600;
  color:var(--color-primary);
  transition:color .25s ease;
}
.related-link:hover{color:var(--color-primary-dark)}
.related-link .arrow{
  display:inline-block;
  transition:transform .25s ease;
}
.related-card:hover .related-link .arrow{transform:translateX(4px)}

.cta-banner{
  background:var(--color-primary);
  padding:80px 0;
  position:relative;
  overflow:hidden;
  text-align:center;
}
.cta-banner::before{
  content:'365';
  position:absolute;
  right:-20px;top:-60px;
  font-family:var(--font-serif);
  font-size:260px;
  font-weight:700;
  color:rgba(255,255,255,0.05);
  line-height:1;
  pointer-events:none;
  user-select:none;
}
.cta-banner::after{
  content:'';
  position:absolute;
  top:0;left:50%;transform:translateX(-50%);
  width:60px;height:2px;
  background:var(--color-accent);
}
.cta-banner .cta-inner{position:relative;z-index:1}
.cta-banner h2{
  font-family:var(--font-serif);
  font-size:36px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:0.01em;
}
.cta-banner p{
  color:rgba(255,255,255,0.8);
  font-size:16px;
  margin-bottom:32px;
}
.btn-accent{
  display:inline-block;
  background:var(--color-accent);
  color:#1C1C1A;
  padding:14px 36px;
  border-radius:var(--radius-sm);
  font-size:16px;
  font-weight:600;
  border:none;
  transition:background .25s ease, transform .25s ease, box-shadow .25s ease;
}
.btn-accent:hover{
  background:var(--color-accent-dark);
  color:#1C1C1A;
  transform:translateY(-1px);
  box-shadow:0 6px 20px rgba(0,0,0,0.18);
}
.btn-accent:focus-visible{
  outline:2px solid #fff;
  outline-offset:3px;
}

.site-footer{
  background:var(--color-primary-dark);
  color:rgba(255,255,255,0.8);
  border-top:2px solid var(--color-accent);
}
.footer-top{padding:64px 0 40px}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand .logo{color:#fff}
.footer-brand .logo .logo-dark{color:var(--color-accent)}
.footer-brand .logo .logo-mark{
  background:var(--color-accent);
  color:var(--color-primary-dark);
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.75;
  color:rgba(255,255,255,0.6);
  max-width:340px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
  font-family:var(--font-serif);
}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{
  font-size:14px;
  color:rgba(255,255,255,0.72);
  transition:color .25s ease, padding-left .25s ease;
}
.footer-col a:hover{
  color:var(--color-accent);
  padding-left:3px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.1);
  padding:20px 0;
}
.footer-bottom-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,0.5);
}
.footer-copy,.footer-icp{white-space:nowrap}

@media (max-width:992px){
  .container{padding:0 24px}
  .header-search{flex-basis:240px}
  .header-hot{display:none}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .article-header h1{font-size:36px}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .header-top-inner{gap:12px}
  .header-search{flex:1;min-width:0}
  .header-search input{display:none}
  .header-search form{justify-content:flex-end}
  .header-search button{
    border-radius:12px;
    border:1px solid var(--color-primary);
    width:40px;
  }
  .btn-header{display:none}
  .main-nav{
    gap:24px;
    overflow-x:auto;
    scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .main-nav::-webkit-scrollbar{display:none}
  .nav-link{scroll-snap-align:start;font-size:14px}
  .article-header{padding:24px 0 16px}
  .article-header h1{font-size:30px}
  .article-cover img{height:260px}
  .article-body{font-size:16px;padding:16px 16px 32px}
  .related-grid{grid-template-columns:1fr}
  .related-posts{padding:56px 0}
  .cta-banner{padding:64px 0}
  .cta-banner h2{font-size:28px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-top{padding:48px 0 32px}
  .footer-bottom-inner{flex-direction:column;text-align:center}
}
@media (max-width:576px){
  .logo-text{font-size:18px}
  .logo-mark{width:30px;height:30px;font-size:14px;border-radius:6px}
  .article-header h1{font-size:26px;line-height:1.35}
  .article-meta{gap:10px}
  .article-meta .badge{font-size:11px;padding:2px 10px}
  .breadcrumb{font-size:13px}
  .article-cover{padding:8px 0 20px}
  .article-cover img{height:200px;border-radius:var(--radius-md)}
  .pager-row{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-banner{padding:56px 0}
  .cta-banner h2{font-size:24px}
  .section-head h2{font-size:26px}
  .btn-accent{width:100%;text-align:center}
  .footer-bottom-inner{font-size:12px}
}

/* roulang page: category2 */
:root {
  --color-primary: #14534F;
  --color-primary-dark: #0E3A38;
  --color-primary-soft: #E4EEEC;
  --color-accent: #C6A45B;
  --color-accent-dark: #A8873F;
  --color-accent-soft: #F5EEDD;
  --color-bg: #FAF7F2;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F0EAE0;
  --color-text: #1C1C1A;
  --color-text-muted: #63635E;
  --color-border: #E5E0D8;
  --shadow-sm: 0 2px 8px rgba(28, 28, 26, 0.06);
  --shadow-hover: 0 8px 24px rgba(28, 28, 26, 0.08);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover {
  color: var(--color-primary-dark);
}

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

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

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-top {
  border-bottom: 1px solid var(--color-border);
}

.header-top-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

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

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--color-primary);
  color: #fff;
  font-family: 'Noto Serif SC', 'Songti SC', serif;
  font-size: 18px;
  font-weight: 700;
  border-radius: 10px;
  letter-spacing: 0.05em;
}

.logo-text {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.logo-dark {
  color: var(--color-text);
}

.header-search {
  flex: 1;
  max-width: 340px;
}

.header-search form {
  display: flex;
  height: 40px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.header-search form:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(20, 83, 79, 0.12);
}

.header-search input {
  flex: 1;
  padding: 0 14px;
  border: none;
  background: transparent;
  font-size: 14px;
  color: var(--color-text);
}

.header-search button {
  width: 44px;
  background: var(--color-primary);
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  transition: background 0.25s ease;
}

.header-search button:hover {
  background: var(--color-primary-dark);
}

.header-hot {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}

.header-hot a {
  font-size: 13px;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.header-hot a:hover {
  color: var(--color-primary);
}

.btn-header {
  margin-left: 4px;
}

.header-bottom {
  background: rgba(250, 247, 242, 0.96);
}

.header-bottom-inner {
  height: 44px;
  display: flex;
  align-items: center;
}

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

.main-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 10px 0;
  position: relative;
  white-space: nowrap;
  transition: color 0.25s ease;
}

.main-nav .nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

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

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

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

.main-nav .nav-link.active::after {
  transform: scaleX(1);
  background: var(--color-primary);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: #1C1C1A;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

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

.btn-outline:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

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

.btn-dark:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}

.btn-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 22px 0 0;
}

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

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

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

.breadcrumb .sep {
  color: var(--color-border);
}

.breadcrumb .current {
  color: var(--color-primary);
  font-weight: 500;
}

/* ===== Page Head ===== */
.page-head {
  padding: 40px 0 20px;
}

.page-head .section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.page-head h1 {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-size: 42px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.page-head .page-desc {
  margin-top: 16px;
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-muted);
}

/* ===== Category Layout ===== */
.category-section {
  padding: 20px 0 80px;
}

.category-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: start;
}

/* ===== Article Cards ===== */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-card {
  display: flex;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.article-card .card-thumb {
  width: 200px;
  min-height: 160px;
  flex-shrink: 0;
  background: var(--color-surface-soft);
  overflow: hidden;
}

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

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

.article-card .card-body {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.article-card .card-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font-weight: 600;
  letter-spacing: 0.03em;
}

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

.badge-outline {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent-dark);
}

.article-card h3 {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--color-text);
  transition: color 0.25s ease;
}

.article-card h3 a {
  color: inherit;
}

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

.article-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.card-meta .read-link {
  color: var(--color-primary);
  font-weight: 500;
  margin-left: auto;
}

.card-meta .read-link:hover {
  color: var(--color-primary-dark);
}

/* ===== Sidebar ===== */
.category-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.side-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 28px 24px;
}

.side-card .card-title {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.side-card .card-title::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--color-accent);
  border-radius: 2px;
}

.side-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.side-card .btn {
  width: 100%;
  margin-bottom: 10px;
}

.side-card .btn:last-child {
  margin-bottom: 0;
}

.side-links {
  list-style: none;
}

.side-links li {
  border-bottom: 1px solid var(--color-border);
}

.side-links li:last-child {
  border-bottom: none;
}

.side-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 2px;
  font-size: 15px;
  color: var(--color-text);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.side-links a::after {
  content: '→';
  color: var(--color-accent-dark);
  font-size: 14px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

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

.side-links a:hover::after {
  opacity: 1;
}

.update-plan {
  list-style: none;
}

.update-plan li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

.update-plan li:last-child {
  border-bottom: none;
}

.update-plan .plan-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  min-width: 28px;
}

.update-plan .plan-text h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.update-plan .plan-text p {
  font-size: 13px;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

/* ===== Flow Section ===== */
.flow-section {
  background: var(--color-surface-soft);
  padding: 80px 0;
}

.flow-section .section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.flow-section h2 {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 12px;
}

.flow-section .section-desc {
  font-size: 16px;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 48px;
}

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

.flow-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  counter-increment: flow;
}

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

.flow-item .flow-num {
  font-family: 'Noto Serif SC', serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.85;
}

.flow-item .flow-num::before {
  content: '0' counter(flow);
}

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

.flow-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

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

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

.faq-section .section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.faq-section h2 {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  margin-bottom: 40px;
}

.faq-list {
  border-top: 1px solid var(--color-border);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 16px;
  cursor: pointer;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  border-left: 3px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.faq-question:hover {
  background: var(--color-bg);
  border-left-color: var(--color-primary);
}

.faq-question .icon {
  font-size: 22px;
  font-weight: 300;
  color: var(--color-primary);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-question .icon {
  transform: rotate(45deg);
}

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

.faq-answer-inner {
  padding: 0 16px 20px 36px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* ===== CTA Bar ===== */
.cta-bar {
  padding: 56px 0 88px;
}

.cta-bar-inner {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-sm);
}

.cta-bar-text h3 {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  font-size: 26px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

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

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

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  border-top: 2px solid var(--color-accent);
}

.footer-top {
  padding: 64px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

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

.footer-brand .logo-mark {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}

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

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

.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  opacity: 0.75;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}

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

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

.footer-col a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-col a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-icp {
  letter-spacing: 0.03em;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .header-top-inner {
    gap: 14px;
  }

  .header-search {
    max-width: 240px;
  }

  .header-hot {
    display: none;
  }

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

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

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

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .header-top {
    overflow-x: auto;
    scrollbar-width: none;
  }

  .header-top::-webkit-scrollbar {
    display: none;
  }

  .header-top-inner {
    height: 56px;
    gap: 12px;
    min-width: 640px;
  }

  .header-bottom-inner {
    overflow-x: auto;
    scrollbar-width: none;
  }

  .header-bottom-inner::-webkit-scrollbar {
    display: none;
  }

  .main-nav {
    gap: 24px;
    min-width: max-content;
  }

  .page-head {
    padding: 28px 0 16px;
  }

  .page-head h1 {
    font-size: 32px;
  }

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

  .article-card .card-thumb {
    width: 100%;
    min-height: 0;
    aspect-ratio: 16 / 9;
  }

  .cta-bar-inner {
    padding: 32px 24px;
    flex-direction: column;
    text-align: center;
  }

  .cta-bar-actions {
    justify-content: center;
  }

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

  .footer-top {
    padding: 44px 0 24px;
  }
}

@media (max-width: 576px) {
  .page-head h1 {
    font-size: 28px;
  }

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

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

  .footer-bottom-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

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

  .btn-header {
    padding: 0 16px;
    font-size: 13px;
    height: 36px;
  }
}

@media (max-width: 520px) {
  .article-card .card-body {
    padding: 16px;
  }

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

  .side-card {
    padding: 20px 18px;
  }

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