/* roulang page: index */
:root {
  --color-primary: #0D7A5F;
  --color-primary-dark: #095E49;
  --color-primary-light: #E3F2EC;
  --color-accent: #E8632A;
  --color-accent-hover: #C94E1B;
  --color-bg: #F6F8F7;
  --color-surface: #FFFFFF;
  --color-text: #1F2A27;
  --color-text-secondary: #5A6D67;
  --color-border: #DCE6E2;
  --color-footer: #0B1F1B;
  --radius-card: 14px;
  --radius-button: 10px;
  --radius-image: 12px;
  --shadow-card: 0 2px 12px rgba(13,122,95,0.06);
  --shadow-card-hover: 0 4px 20px rgba(13,122,95,0.14);
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: SFMono-Regular, Consolas, "Liberation Mono", monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container-custom { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-padding { padding: 100px 0; }
.section-title { font-size: 32px; font-weight: 700; line-height: 1.3; color: var(--color-text); margin-bottom: 16px; }
.section-desc { font-size: 16px; color: var(--color-text-secondary); line-height: 1.75; max-width: 780px; margin-bottom: 40px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 600; border-radius: var(--radius-button);
  padding: 0 28px; height: 48px; transition: all .25s ease;
  border: 1px solid transparent; text-decoration: none; line-height: 1;
}
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.btn-accent { background: var(--color-accent); color: #fff; box-shadow: 0 4px 14px rgba(232,99,42,0.3); }
.btn-accent:hover { background: var(--color-accent-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(232,99,42,0.38); }
.btn-accent:active { transform: translateY(2px); box-shadow: 0 2px 8px rgba(232,99,42,0.25); }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 4px 14px rgba(13,122,95,0.25); }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(2px); }
.btn-ghost { background: transparent; color: var(--color-text); border: 1px solid var(--color-border); }
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(13,122,95,0.04); }
.btn-ghost:active { transform: translateY(2px); }
.btn-white { background: #fff; color: var(--color-primary); font-weight: 700; font-size: 18px; height: 48px; border-radius: 12px; }
.btn-white:hover { background: var(--color-primary-light); color: var(--color-primary-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }

.site-header {
  position: fixed; top: 0; left: 0; width: 100%; height: 64px; z-index: 1000;
  display: flex; transition: background .35s, box-shadow .35s, backdrop-filter .35s;
}
.header-left {
  width: 50%; height: 64px; display: flex; align-items: center; justify-content: flex-end;
  padding: 0 20px 0 24px; gap: 12px; background: transparent;
  transition: background .35s;
}
.header-right {
  width: 50%; height: 64px; display: flex; align-items: center;
  padding: 0 24px 0 20px; gap: 16px; background: var(--color-bg);
  border-left: 1px dashed rgba(13,122,95,0.25);
  transition: background .35s, border-color .35s;
}
.header-divider {
  width: 1px; height: 64px; background: rgba(255,255,255,0.15); flex-shrink: 0;
  transition: background .35s;
}
.brand-logo { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.brand-logo svg { width: 30px; height: 22px; }
.brand-logo .brand-text { font-size: 16px; font-weight: 800; color: var(--color-text); letter-spacing: 0.01em; white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 18px; margin-left: 8px; overflow-x: auto; scrollbar-width: none; }
.main-nav::-webkit-scrollbar { display: none; }
.main-nav a {
  font-size: 13px; font-weight: 500; color: var(--color-text-secondary);
  white-space: nowrap; position: relative; padding: 6px 0; text-decoration: none;
  letter-spacing: 0.02em; transition: color .2s;
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px;
  background: var(--color-primary); transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease; border-radius: 2px;
}
.main-nav a:hover { color: var(--color-primary); }
.main-nav a:hover::after { transform: scaleX(1); }
.main-nav a.active { color: var(--color-primary); font-weight: 600; }
.main-nav a.active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.search-btn {
  width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,0.5); color: #fff; font-size: 15px;
  transition: background .25s, border-color .25s, color .25s;
}
.search-btn:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.8); }
.search-btn:active { transform: scale(0.95); }
.header-cta {
  height: 42px; padding: 0 22px; border-radius: 8px; background: var(--color-primary);
  color: #fff; font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px;
  transition: background .25s, transform .2s;
}
.header-cta:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-1px); }
.header-cta:active { transform: translateY(1px); }
.site-header.scrolled .header-left { background: rgba(255,255,255,0.95); }
.site-header.scrolled .header-right { background: rgba(255,255,255,0.95); border-left-color: transparent; }
.site-header.scrolled { backdrop-filter: blur(8px); box-shadow: 0 1px 12px rgba(0,0,0,0.06); }
.site-header.scrolled .header-divider { background: var(--color-border); }
.site-header.scrolled .search-btn { border-color: var(--color-border); color: var(--color-text-secondary); }
.site-header.scrolled .search-btn:hover { background: var(--color-primary-light); color: var(--color-primary); }
.site-header.scrolled .brand-logo .brand-text { color: var(--color-text); }
.hamburger { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: 8px; color: var(--color-text); font-size: 18px; transition: background .2s; }
.hamburger:hover { background: var(--color-primary-light); }
.mobile-nav {
  position: fixed; top: 64px; left: 0; width: 100%; background: #fff; z-index: 999;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1); display: none; padding: 12px 24px 20px;
  max-height: calc(100vh - 64px); overflow-y: auto;
}
.mobile-nav.open { display: block; }
.mobile-nav a { display: block; padding: 12px 0; font-size: 16px; color: var(--color-text); border-bottom: 1px solid #f0f3f1; }
.mobile-nav a:hover { color: var(--color-primary); }
.mobile-nav a:last-child { border-bottom: none; }

.hero { display: flex; min-height: 900px; height: 100vh; max-height: 1200px; position: relative; }
.hero-visual {
  width: 50%; position: relative; background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center left; background-repeat: no-repeat;
  overflow: hidden;
}
.hero-visual::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(to right, rgba(13,122,95,0.92) 0%, rgba(13,122,95,0.6) 35%, rgba(13,122,95,0) 100%);
}
.hero-visual::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 100px; z-index: 2;
  background: linear-gradient(to bottom, transparent, #F6F8F7 100%);
  opacity: 0.6;
}
.hero-watermark {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%); z-index: 3;
  font-size: 60px; font-weight: 800; color: #fff; opacity: 0.08; white-space: nowrap; letter-spacing: 0.08em; pointer-events: none;
}
.hero-content {
  width: 50%; background: var(--color-bg); display: flex; align-items: center;
  padding: 64px 48px 64px 56px; position: relative;
}
.hero-content-inner { max-width: 440px; width: 100%; margin-left: auto; margin-right: auto; }
.hero-title { font-size: clamp(34px, 4.5vw, 54px); font-weight: 800; line-height: 1.2; color: var(--color-text); margin-bottom: 20px; }
.hero-title .hl { color: var(--color-primary); }
.hero-subtitle { font-size: 18px; color: var(--color-text-secondary); line-height: 1.6; margin-bottom: 36px; font-weight: 400; }
.hero-buttons { display: flex; gap: 16px; margin-bottom: 32px; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 24px; flex-wrap: wrap; }
.hero-badge { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--color-text-secondary); }
.hero-badge i { font-size: 17px; color: var(--color-primary); width: 22px; text-align: center; }

.features-section { background: #fff; padding: 100px 0; }
.features-left { position: sticky; top: 100px; }
.features-left h2 { font-size: 30px; font-weight: 700; line-height: 1.3; color: var(--color-text); margin-bottom: 16px; }
.features-left p { font-size: 15px; color: var(--color-text-secondary); line-height: 1.75; margin-bottom: 20px; }
.link-more { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600; color: var(--color-primary); }
.link-more i { transition: transform .25s; }
.link-more:hover i { transform: translateX(4px); }
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-card);
  padding: 32px 28px; position: relative; overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.feature-card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 3px; height: 0; background: var(--color-primary);
  transition: height .35s ease;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); border-color: rgba(13,122,95,0.3); }
.feature-card:hover::before { height: 100%; }
.feature-icon {
  width: 48px; height: 48px; background: var(--color-primary-light); color: var(--color-primary);
  border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px;
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 18px; font-weight: 600; color: var(--color-text); margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.65; }

.screenshots-section { background: #0B2A26; padding: 100px 0; position: relative; overflow: hidden; }
.screenshots-section .section-title { color: #fff; text-align: center; }
.screenshots-section .section-desc { color: rgba(255,255,255,0.6); text-align: center; margin-left: auto; margin-right: auto; }
.slider-wrap { position: relative; max-width: 1120px; margin: 0 auto; padding: 20px 0 40px; }
.slider-viewport { overflow: hidden; padding: 20px 0; cursor: grab; }
.slider-viewport:active { cursor: grabbing; }
.slider-track { display: flex; transition: transform .5s cubic-bezier(0.25, 0.8, 0.25, 1); }
.slide { flex-shrink: 0; padding: 0 12px; width: 60%; }
.slide-card {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px;
  overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.4); transition: transform .4s, opacity .4s;
}
.slide-card img { width: 100%; height: 420px; object-fit: cover; }
.slide-caption { text-align: center; font-size: 16px; font-weight: 600; color: #fff; padding: 18px 0 6px; }
.slider-arrows { display: flex; justify-content: center; gap: 12px; margin-top: 24px; }
.slider-arrow {
  width: 44px; height: 44px; border-radius: 50%; background: #fff; color: var(--color-text);
  display: flex; align-items: center; justify-content: center; font-size: 16px;
  transition: background .25s, color .25s, transform .2s; box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}
.slider-arrow:hover { background: var(--color-accent); color: #fff; transform: translateY(-2px); }
.slider-arrow:active { transform: scale(0.94); }
.slider-dots { display: flex; justify-content: center; gap: 10px; margin-top: 20px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.3); transition: all .3s; }
.dot.active { background: var(--color-accent); width: 24px; border-radius: 8px; }

.system-section { background: var(--color-bg); padding: 100px 0; }
.tabs-wrap { display: flex; gap: 28px; margin-bottom: 40px; border-bottom: 1px solid var(--color-border); overflow-x: auto; }
.tab-item {
  font-size: 15px; font-weight: 500; color: var(--color-text-secondary); padding: 12px 2px;
  border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap;
  transition: color .2s, border-color .2s; background: none;
}
.tab-item:hover { color: var(--color-primary); }
.tab-item.active { color: var(--color-primary); font-weight: 700; border-bottom-color: var(--color-primary); }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn .3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.config-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.config-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card); padding: 28px 28px 12px;
  transition: box-shadow .3s, transform .3s;
}
.config-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.config-card h4 { font-size: 17px; font-weight: 600; color: var(--color-text); margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid #f0f3f1; }
.config-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid #f7f9f8; }
.config-row:last-child { border-bottom: none; }
.config-row .label { font-size: 14px; color: var(--color-text-secondary); }
.config-row .value { font-size: 14px; color: var(--color-primary); font-weight: 600; font-family: var(--font-mono); }

.reviews-section { background: var(--color-primary-light); padding: 100px 0; }
.reviews-header { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 40px; flex-wrap: wrap; gap: 20px; }
.reviews-header .section-title { margin-bottom: 0; }
.rating-summary { display: flex; align-items: center; gap: 12px; }
.rating-score { font-size: 44px; font-weight: 800; color: var(--color-primary); line-height: 1; }
.rating-stars { color: var(--color-accent); font-size: 16px; letter-spacing: 2px; }
.reviews-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.review-card {
  background: #fff; border-radius: 16px; padding: 24px; position: relative;
  box-shadow: var(--shadow-card); transition: transform .3s, box-shadow .3s;
}
.review-card::before {
  content: ""; position: absolute; top: 0; left: 24px; width: 32px; height: 8px;
  background: var(--color-primary); border-radius: 0 0 4px 4px;
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
.review-user { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700; color: #fff; flex-shrink: 0;
}
.review-avatar.green { background: var(--color-primary); }
.review-avatar.orange { background: var(--color-accent); }
.review-name { font-size: 14px; font-weight: 600; color: var(--color-text); }
.review-stars { font-size: 13px; color: var(--color-accent); margin-top: 2px; letter-spacing: 1px; }
.review-stars .off { color: var(--color-border); }
.review-text { font-size: 14px; line-height: 1.6; color: var(--color-text-secondary); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

.guide-section { background: #fff; padding: 100px 0; }
.guide-wrap { display: flex; align-items: center; gap: 60px; }
.guide-text { flex: 1; }
.guide-text h2 { font-size: 30px; font-weight: 700; color: var(--color-text); margin-bottom: 16px; }
.guide-text p { font-size: 15px; color: var(--color-text-secondary); line-height: 1.75; margin-bottom: 12px; }
.guide-form { flex: 1; max-width: 420px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--color-text); margin-bottom: 8px; }
.form-group label span.optional { color: var(--color-text-secondary); font-weight: 400; font-size: 12px; }
.form-control {
  width: 100%; height: 48px; padding: 0 16px; border: 1px solid var(--color-border);
  border-radius: 10px; background: #fff; font-size: 15px; color: var(--color-text);
  transition: border-color .2s, box-shadow .2s;
}
.form-control:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 4px rgba(13,122,95,0.12); }
.form-control::placeholder { color: #8A9A94; }
textarea.form-control { height: 100px; padding: 12px 16px; resize: vertical; line-height: 1.5; }
.form-submit { width: 100%; height: 48px; border-radius: 10px; background: var(--color-primary); color: #fff; font-size: 16px; font-weight: 600; transition: background .25s, transform .2s, box-shadow .3s; }
.form-submit:hover { background: var(--color-primary-dark); box-shadow: 0 4px 14px rgba(13,122,95,0.25); }
.form-submit:active { transform: translateY(2px); }
.form-privacy { font-size: 12px; color: var(--color-text-secondary); margin-top: 12px; text-align: center; }
.form-success { background: #E8F5E9; color: #2E7D32; border-radius: 8px; padding: 16px; font-size: 14px; display: flex; align-items: center; gap: 10px; margin-top: 16px; }
.form-success i { font-size: 16px; }

.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 80px 0; position: relative; overflow: hidden;
}
.cta-section::before {
  content: ""; position: absolute; top: -50%; right: -20%; width: 500px; height: 500px;
  border-radius: 50%; background: rgba(255,255,255,0.04); pointer-events: none;
}
.cta-wrap { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; position: relative; z-index: 1; }
.cta-left h2 { font-size: 30px; font-weight: 700; color: #fff; margin-bottom: 8px; line-height: 1.3; }
.cta-left .cta-meta { font-size: 14px; color: rgba(255,255,255,0.7); font-family: var(--font-mono); }
.cta-right { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.cta-icon-btn {
  width: 48px; height: 48px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.6);
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px;
  transition: all .25s;
}
.cta-icon-btn:hover { background: #fff; color: var(--color-primary); border-color: #fff; }
.cta-icon-btn:active { transform: scale(0.92); }
.cta-safety { width: 100%; text-align: right; font-size: 12px; color: rgba(255,255,255,0.6); margin-top: 8px; }

.news-section { background: var(--color-bg); padding: 100px 0; }
.news-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 36px; }
.news-header h2 { font-size: 30px; font-weight: 700; color: var(--color-text); margin: 0; }
.news-view-all { font-size: 14px; font-weight: 600; color: var(--color-primary); display: inline-flex; align-items: center; gap: 6px; }
.news-view-all i { transition: transform .25s; }
.news-view-all:hover i { transform: translateX(4px); }
.news-list-card {
  display: flex; align-items: center; gap: 24px; background: #fff;
  border: 1px solid var(--color-border); border-radius: var(--radius-card);
  padding: 20px 24px; margin-bottom: 16px;
  transition: background .25s, border-color .25s, box-shadow .25s, transform .25s;
}
.news-list-card:hover { background: #F0F5F2; border-color: rgba(13,122,95,0.25); box-shadow: var(--shadow-card); transform: translateY(-2px); }
.news-date {
  width: 96px; height: 96px; border-radius: 12px; background: var(--color-primary-light);
  display: flex; flex-direction: column; align-items: center; justify-content: center; flex-shrink: 0;
  transition: background .3s, color .3s;
}
.news-date .day { font-size: 28px; font-weight: 800; color: var(--color-primary); line-height: 1.1; font-family: var(--font-mono); transition: color .3s; }
.news-date .month { font-size: 14px; color: var(--color-text-secondary); margin-top: 2px; }
.news-list-card:hover .news-date { background: var(--color-primary); }
.news-list-card:hover .news-date .day { color: #fff; }
.news-list-card:hover .news-date .month { color: rgba(255,255,255,0.75); }
.news-body { flex: 1; min-width: 0; }
.news-category {
  display: inline-block; background: var(--color-primary); color: #fff; font-size: 12px;
  padding: 3px 12px; border-radius: 999px; margin-bottom: 8px; font-weight: 500;
}
.news-body h4 { font-size: 18px; font-weight: 600; color: var(--color-text); margin-bottom: 6px; transition: color .2s; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-list-card:hover .news-body h4 { color: var(--color-primary-dark); }
.news-body p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-link { width: 90px; text-align: right; flex-shrink: 0; }
.news-link a { font-size: 14px; font-weight: 600; color: var(--color-primary); display: inline-block; padding: 20px 0; transition: color .2s; }
.news-link a:hover { color: var(--color-accent); }
.news-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 320px; background: #fff; border-radius: var(--radius-card);
  border: 1px dashed var(--color-border);
}
.news-empty i { font-size: 64px; color: #BCC5C1; margin-bottom: 12px; }
.news-empty p { font-size: 16px; color: var(--color-text-secondary); }

.faq-section { background: #fff; padding: 100px 0; }
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item {
  background: #fff; border: 1px solid var(--color-border); border-radius: 12px;
  margin-bottom: 12px; overflow: hidden; transition: border-color .25s, box-shadow .25s;
}
.faq-item.open { border-color: rgba(13,122,95,0.4); box-shadow: var(--shadow-card); }
.faq-question {
  width: 100%; height: 48px; display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; font-size: 16px; font-weight: 600; color: var(--color-text);
  background: none; text-align: left; transition: color .2s;
}
.faq-question:hover { color: var(--color-primary); }
.faq-icon { font-size: 20px; color: var(--color-accent); transition: transform .3s ease; display: flex; align-items: center; justify-content: center; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .3s cubic-bezier(0.4, 0, 0.2, 1);
}
.faq-answer-inner { padding: 0 24px 16px; font-size: 15px; color: var(--color-text-secondary); line-height: 1.7; border-top: 1px solid #f0f3f1; padding-top: 12px; margin: 0 24px; padding-left: 0; padding-right: 0; }

.site-footer { background: var(--color-footer); color: rgba(255,255,255,0.6); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .brand-logo { margin-bottom: 16px; }
.footer-brand .brand-text { color: #fff; font-size: 18px; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.5); margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social-btn {
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.6); font-size: 16px;
  transition: all .25s;
}
.footer-social-btn:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 18px; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.5); padding: 5px 0; transition: color .2s, padding-left .2s; }
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-contact p { font-size: 14px; color: rgba(255,255,255,0.5); padding: 5px 0; display: flex; align-items: center; gap: 10px; }
.footer-contact i { width: 18px; color: var(--color-primary); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; text-align: center; font-size: 12px; color: rgba(255,255,255,0.35); }

.back-to-top {
  position: fixed; right: 24px; bottom: 24px; width: 44px; height: 44px; border-radius: 50%;
  background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 16px; box-shadow: 0 4px 16px rgba(13,122,95,0.3); z-index: 999;
  opacity: 0; visibility: hidden; transition: all .3s ease;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-2px); }
.back-to-top:active { transform: scale(0.94); }

@media (max-width: 1024px) {
  .main-nav { gap: 12px; }
  .main-nav a { font-size: 12px; }
  .hero-content { padding: 48px 36px 48px 40px; }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section-padding { padding: 60px 0; }
  .features-section, .screenshots-section, .system-section, .reviews-section, .guide-section, .news-section, .faq-section, .cta-section { padding: 60px 0; }
  .header-left { display: none; }
  .header-right { width: 100%; padding: 0 16px; border-left: none; justify-content: space-between; }
  .header-divider { display: none; }
  .hamburger { display: flex; }
  .main-nav { display: none; }
  .header-cta { display: inline-flex; }
  .hero { flex-direction: column; height: auto; min-height: auto; }
  .hero-visual { width: 100%; height: 220px; }
  .hero-visual::after { display: none; }
  .hero-watermark { font-size: 34px; bottom: 16px; }
  .hero-content { width: 100%; padding: 48px 24px; }
  .hero-content-inner { margin: 0 auto; }
  .hero-title { font-size: 34px; }
  .hero-buttons .btn { flex: 1; min-width: 140px; }
  .features-left { position: static; margin-bottom: 40px; }
  .features-grid { grid-template-columns: 1fr; }
  .slide { width: 85%; }
  .slide-card img { height: 260px; }
  .config-cards { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .guide-wrap { flex-direction: column; gap: 40px; }
  .guide-form { width: 100%; max-width: none; }
  .cta-wrap { flex-direction: column; align-items: flex-start; }
  .cta-safety { text-align: left; }
  .news-list-card { flex-wrap: wrap; gap: 16px; }
  .news-date { width: 64px; height: 64px; }
  .news-date .day { font-size: 20px; }
  .news-body { width: calc(100% - 88px); flex: none; }
  .news-body h4 { font-size: 16px; }
  .news-body p { -webkit-line-clamp: 2; }
  .news-link { width: 100%; text-align: left; padding-left: 80px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .faq-question { font-size: 15px; padding: 0 16px; }
}

@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .news-link { padding-left: 0; }
  .hero-badges { gap: 12px; }
  .hero-badge { font-size: 13px; }
  .cta-right .btn-white { width: 100%; }
  .cta-icon-btn { width: 44px; height: 44px; }
}

/* roulang page: category1 */
:root {
            --color-primary: #0D7A5F;
            --color-primary-dark: #095E49;
            --color-primary-light: #E3F2EC;
            --color-accent: #E8632A;
            --color-accent-hover: #C94E1B;
            --color-bg: #F6F8F7;
            --color-surface: #FFFFFF;
            --color-text: #1F2A27;
            --color-text-secondary: #5A6D67;
            --color-border: #DCE6E2;
            --color-footer: #0B1F1B;
            --radius-card: 14px;
            --radius-button: 10px;
            --radius-image: 12px;
            --shadow-card: 0 2px 12px rgba(13, 122, 95, 0.06);
            --shadow-card-hover: 0 4px 20px rgba(13, 122, 95, 0.14);
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --mono-stack: SFMono-Regular, Consolas, monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            font-size: 16px;
            -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);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
            box-shadow: 0 0 0 4px rgba(13, 122, 95, 0.15);
        }

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

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

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.93);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid rgba(220, 230, 226, 0.85);
            transition: background 0.3s ease, border-color 0.3s ease;
        }

        .header-inner {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

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

        .brand-logo svg {
            width: 40px;
            height: 24px;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.02em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }

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

        .main-nav a {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-secondary);
            padding: 8px 10px;
            white-space: nowrap;
            transition: color 0.25s ease;
        }

        .main-nav a::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 0;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }

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

        .main-nav a:hover::after,
        .main-nav a.active::after {
            width: 100%;
        }

        .main-nav a.active {
            color: var(--color-primary);
            font-weight: 700;
        }

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

        .search-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            transition: background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
        }

        .search-btn:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            box-shadow: var(--shadow-card-hover);
        }

        .search-btn:active {
            transform: translateY(2px);
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 46px;
            padding: 0 22px;
            background: var(--color-primary);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            border-radius: var(--radius-button);
            transition: background 0.25s, box-shadow 0.25s, transform 0.15s;
        }

        .btn-download:hover {
            background: var(--color-primary-dark);
            color: #fff;
            box-shadow: var(--shadow-card-hover);
        }

        .btn-download:active {
            transform: translateY(2px);
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            color: var(--color-text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: background 0.25s, color 0.25s;
        }

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

        /* ===== 分类 Hero ===== */
        .category-hero {
            padding: 148px 0 64px;
            background: linear-gradient(135deg, #E3F2EC 0%, #F6F8F7 100%);
            position: relative;
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
        }

        .category-hero::before,
        .category-hero::after {
            content: "";
            position: absolute;
            width: 220px;
            height: 130px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 80 48' fill='none' stroke='%230D7A5F' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 24c0-12 8-20 20-20s20 8 20 20-8 20-20 20S4 36 4 24z'/%3E%3Cpath d='M44 24h32l-10-12'/%3E%3Cpath d='M44 24h32l-10 12'/%3E%3C/svg%3E") no-repeat center center;
            background-size: contain;
            opacity: 0.06;
            pointer-events: none;
        }

        .category-hero::before {
            top: 20px;
            left: 8%;
        }

        .category-hero::after {
            bottom: 10px;
            right: 6%;
            transform: rotate(25deg);
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
        }

        .category-hero h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
            letter-spacing: 0.01em;
        }

        .category-divider {
            display: block;
            width: 40px;
            height: 4px;
            background: var(--color-primary);
            border-radius: 2px;
            margin: 16px 0 18px;
        }

        .category-hero p {
            font-size: 15px;
            color: var(--color-text-secondary);
            max-width: 720px;
            line-height: 1.7;
        }

        /* ===== 内容列表区 ===== */
        .category-list-section {
            padding: 64px 0 72px;
            background: var(--color-bg);
        }

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

        .category-list-item {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 28px 8px;
            border-bottom: 1px solid var(--color-border);
            transition: background 0.3s ease, padding 0.3s ease;
            border-radius: 12px;
        }

        .category-list-item:hover {
            background: rgba(227, 242, 236, 0.45);
            padding-left: 16px;
            padding-right: 16px;
        }

        .list-thumb {
            width: 96px;
            height: 96px;
            border-radius: var(--radius-image);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--color-primary-light);
        }

        .list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .category-list-item:hover .list-thumb img {
            transform: scale(1.05);
        }

        .list-body {
            flex: 1;
            min-width: 0;
        }

        .list-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
            transition: color 0.25s ease;
        }

        .category-list-item:hover .list-body h3 {
            color: var(--color-primary);
        }

        .list-body p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .list-date {
            font-size: 13px;
            color: #8A9A94;
            font-family: var(--mono-stack);
        }

        /* 分页器 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 48px;
            flex-wrap: wrap;
        }

        .page-item {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            background: transparent;
            border: 1px solid transparent;
            transition: background 0.25s, color 0.25s, border-color 0.25s;
        }

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

        .page-item.active {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 2px 10px rgba(13, 122, 95, 0.2);
        }

        .page-item.next {
            width: auto;
            padding: 0 14px;
            border: 1px solid var(--color-border);
            background: var(--color-surface);
        }

        .page-item.next:hover {
            border-color: var(--color-primary);
            background: var(--color-primary-light);
        }

        /* ===== 学习路径 ===== */
        .steps-section {
            padding: 80px 0;
            background: var(--color-surface);
        }

        .section-title-wrap {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .section-title-wrap h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.3;
        }

        .section-title-wrap .section-tip {
            font-size: 14px;
            color: var(--color-text-secondary);
        }

        .step-card {
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 36px 30px;
            height: 100%;
            transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .step-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 0;
            background: var(--color-primary);
            transition: height 0.3s ease;
        }

        .step-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: rgba(13, 122, 95, 0.3);
        }

        .step-card:hover::before {
            height: 100%;
        }

        .step-num {
            display: inline-flex;
            font-family: var(--mono-stack);
            font-size: 15px;
            font-weight: 700;
            color: var(--color-accent);
            background: rgba(232, 99, 42, 0.1);
            border-radius: 8px;
            padding: 4px 12px;
            margin-bottom: 20px;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.65;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--color-bg);
        }

        .faq-section .section-title-wrap h2 {
            color: var(--color-text);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.25s, box-shadow 0.25s;
        }

        .faq-item:hover {
            border-color: rgba(13, 122, 95, 0.3);
        }

        .faq-question {
            min-height: 52px;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            text-align: left;
            background: transparent;
            width: 100%;
            transition: background 0.2s;
            border-radius: 12px 12px 0 0;
        }

        .faq-question:hover {
            background: rgba(227, 242, 236, 0.4);
        }

        .faq-icon {
            font-size: 20px;
            color: var(--color-accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            font-style: normal;
            line-height: 1;
        }

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

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            border-top: 0 solid var(--color-border);
        }

        .faq-item.open .faq-answer {
            padding: 16px 24px;
            max-height: 300px;
            border-top-width: 1px;
            margin-top: 0;
            border-top-color: var(--color-border);
        }

        /* ===== CTA ===== */
        .category-cta {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .category-cta::before {
            content: "";
            position: absolute;
            top: -40px;
            right: -30px;
            width: 260px;
            height: 160px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 80 48' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 24c0-12 8-20 20-20s20 8 20 20-8 20-20 20S4 36 4 24z'/%3E%3Cpath d='M44 24h32l-10-12'/%3E%3Cpath d='M44 24h32l-10 12'/%3E%3C/svg%3E") no-repeat center center;
            background-size: contain;
            opacity: 0.12;
            pointer-events: none;
        }

        .category-cta h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }

        .category-cta p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            position: relative;
            z-index: 2;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 36px;
            background: #fff;
            color: var(--color-primary);
            font-size: 16px;
            font-weight: 700;
            border-radius: 12px;
            transition: background 0.25s, color 0.25s, box-shadow 0.25s, transform 0.15s;
            position: relative;
            z-index: 2;
        }

        .btn-accent:hover {
            background: var(--color-primary-light);
            color: var(--color-primary-dark);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
        }

        .btn-accent:active {
            transform: translateY(2px);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 80px 0 90px;
            background: var(--color-surface);
        }

        .related-section .section-title-wrap h2 {
            font-size: 28px;
        }

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

        .related-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s;
        }

        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: rgba(13, 122, 95, 0.3);
        }

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

        .related-card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .related-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            transition: color 0.25s;
        }

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

        .related-card-body span {
            font-size: 13px;
            color: #8A9A94;
            font-family: var(--mono-stack);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-footer);
            padding: 64px 0 0;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }

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

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            max-width: 300px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            transition: background 0.25s, color 0.25s, border-color 0.25s;
        }

        .footer-social-btn:hover {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: #fff;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 12px;
            transition: color 0.25s;
            position: relative;
            width: fit-content;
        }

        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
            text-decoration-color: var(--color-primary);
            text-underline-offset: 4px;
        }

        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            width: 16px;
            color: var(--color-primary);
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .main-nav a {
                font-size: 13px;
                padding: 8px 8px;
            }

            .btn-download {
                padding: 0 16px;
                font-size: 14px;
            }

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

        @media (max-width: 900px) {
            .menu-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--color-surface);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.35s ease, padding 0.35s ease, border-width 0.35s;
                border-width: 0;
                z-index: 999;
            }

            .main-nav.nav-open {
                max-height: 520px;
                padding-top: 16px;
                padding-bottom: 16px;
                border-width: 1px;
            }

            .main-nav a {
                padding: 12px 8px;
                font-size: 15px;
                border-bottom: 1px solid rgba(220, 230, 226, 0.6);
            }

            .main-nav a:last-child {
                border-bottom: none;
            }

            .main-nav a::after {
                display: none;
            }

            .search-btn {
                display: none;
            }

            .header-actions {
                gap: 8px;
            }

            .btn-download {
                height: 42px;
                padding: 0 16px;
                font-size: 14px;
            }
        }

        @media (max-width: 640px) {
            .container-custom {
                padding: 0 16px;
            }

            .header-inner {
                padding: 0 16px;
            }

            .category-hero {
                padding: 110px 0 48px;
                min-height: 220px;
            }

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

            .category-hero p {
                font-size: 14px;
            }

            .category-list-section {
                padding: 48px 0 56px;
            }

            .category-list-item {
                gap: 16px;
                padding: 20px 4px;
                align-items: flex-start;
            }

            .list-thumb {
                width: 72px;
                height: 72px;
            }

            .list-body h3 {
                font-size: 16px;
            }

            .list-body p {
                font-size: 13px;
                -webkit-line-clamp: 3;
            }

            .pagination {
                gap: 6px;
                margin-top: 36px;
            }

            .page-item {
                width: 34px;
                height: 34px;
                font-size: 13px;
            }

            .steps-section {
                padding: 56px 0;
            }

            .section-title-wrap {
                margin-bottom: 28px;
            }

            .section-title-wrap h2 {
                font-size: 24px;
            }

            .step-card {
                padding: 28px 22px;
                margin-bottom: 16px;
            }

            .faq-section {
                padding: 56px 0;
            }

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

            .faq-icon {
                font-size: 18px;
            }

            .category-cta {
                padding: 56px 0;
            }

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

            .related-section {
                padding: 56px 0 64px;
            }

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

            .related-card img {
                height: 160px;
            }

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

            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 380px) {
            .container-custom {
                padding: 0 12px;
            }

            .header-inner {
                padding: 0 12px;
                gap: 12px;
            }

            .btn-download {
                padding: 0 12px;
                font-size: 13px;
                height: 40px;
            }

            .brand-text {
                font-size: 16px;
            }

            .category-hero h1 {
                font-size: 24px;
            }

            .list-thumb {
                width: 60px;
                height: 60px;
            }

            .category-list-item {
                gap: 12px;
            }
        }

/* roulang page: article */
:root {
  --color-primary: #0D7A5F;
  --color-primary-dark: #095E49;
  --color-primary-light: #E3F2EC;
  --color-accent: #E8632A;
  --color-accent-hover: #C94E1B;
  --color-bg: #F6F8F7;
  --color-surface: #FFFFFF;
  --color-text: #1F2A27;
  --color-text-secondary: #5A6D67;
  --color-border: #DCE6E2;
  --color-footer: #0B1F1B;
  --radius-card: 14px;
  --radius-button: 10px;
  --radius-image: 12px;
  --shadow-card: 0 2px 12px rgba(13,122,95,0.06);
  --shadow-card-hover: 0 4px 20px rgba(13,122,95,0.14);
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(13,122,95,0.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border: 1px solid transparent;
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  text-align: center;
  background: var(--color-primary);
  color: #fff;
  transition: all .2s ease;
}

.btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(13,122,95,0.2);
}

.btn:active {
  transform: translateY(2px);
  box-shadow: none;
}

.btn-accent {
  background: var(--color-accent);
}

.btn-accent:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 6px 16px rgba(232,99,42,0.24);
}

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

.btn-white:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(13,122,95,0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary);
}

.brand-logo svg {
  width: 34px;
  height: 22px;
  flex-shrink: 0;
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: .02em;
  white-space: nowrap;
}

.brand-text:hover {
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  flex: 1;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  letter-spacing: .02em;
  white-space: nowrap;
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  font-size: 15px;
  transition: all .2s ease;
}

.search-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13,122,95,0.1);
}

.search-btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-button);
  color: var(--color-text);
  font-size: 18px;
  cursor: pointer;
  transition: all .2s ease;
}

.menu-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.menu-toggle:active {
  transform: translateY(2px);
}

.search-overlay {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
  z-index: 999;
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
  box-shadow: 0 20px 40px rgba(11,31,27,0.08);
}

.search-overlay.open {
  max-height: 220px;
  padding: 20px 24px;
}

.search-form {
  display: flex;
  gap: 12px;
  max-width: 620px;
  margin: 0 auto;
}

.search-form input[type="search"] {
  flex: 1;
  height: 48px;
  padding: 0 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-button);
  font-size: 16px;
  background: var(--color-bg);
  color: var(--color-text);
  transition: all .2s ease;
}

.search-form input[type="search"]:hover {
  border-color: var(--color-primary);
}

.search-form input[type="search"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(13,122,95,0.12);
}

.article-tdk {
  background: var(--color-surface);
  padding: calc(var(--header-height) + 40px) 0 40px;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
  max-width: 720px;
  margin: 0 auto 28px;
}

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

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

.breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 360px;
}

.article-head {
  max-width: 720px;
  margin: 0 auto;
}

.article-head h1 {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--color-text);
  margin: 0 0 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 4px;
  font-size: 14px;
  color: var(--color-text-secondary);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 4px;
}

.meta-item i {
  color: var(--color-primary);
  font-size: 13px;
}

.badge {
  display: inline-flex;
  align-items: center;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  line-height: 1.4;
}

.article-main {
  background: var(--color-bg);
}

.article-content-wrap {
  max-width: 1200px;
}

.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 0 72px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
}

.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin: 40px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin: 32px 0 12px;
}

.article-body p {
  margin: 0 0 24px;
}

.article-body img {
  border-radius: var(--radius-image);
  margin: 24px auto;
  display: block;
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-button) var(--radius-button) 0;
  color: var(--color-text-secondary);
}

.article-body pre {
  background: #1F2A27;
  color: #F0F5F2;
  padding: 20px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
  margin: 0 0 24px;
}

.article-body code {
  font-family: SFMono-Regular, Consolas, "Courier New", monospace;
}

.article-not-found {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px 0 120px;
  text-align: center;
}

.not-found-icon {
  width: 96px;
  height: 96px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: 50%;
  font-size: 40px;
  color: var(--color-primary);
}

.article-not-found h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--color-text);
}

.article-not-found p {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin: 0 0 24px;
}

.related-section {
  background: var(--color-surface);
  padding: 100px 0;
}

.section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
}

.section-title-row h2 {
  font-size: 32px;
  font-weight: 700;
  margin: 0;
  color: var(--color-text);
}

.related-grid {
  row-gap: 24px;
}

.related-card {
  display: block;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 100%;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(13,122,95,0.3);
}

.related-card:active {
  transform: translateY(0);
}

.related-thumb {
  width: 100%;
  height: 160px;
  overflow: hidden;
  background: var(--color-primary-light);
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}

.related-card:hover .related-thumb img {
  transform: scale(1.05);
}

.related-info {
  padding: 20px 20px 24px;
}

.related-info h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-text);
  margin: 0 0 8px;
  transition: color .2s ease;
}

.related-card:hover .related-info h3 {
  color: var(--color-primary);
}

.related-time {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.back-link-wrap {
  background: var(--color-bg);
  padding: 40px 0 64px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 8px 4px;
  border-bottom: 2px solid transparent;
  transition: all .2s ease;
}

.back-link:hover {
  color: var(--color-primary-dark);
  border-bottom-color: var(--color-primary);
}

.back-link:active {
  transform: translateY(2px);
}

.back-link i {
  transition: transform .2s ease;
}

.back-link:hover i {
  transform: translateX(-4px);
}

.site-footer {
  background: var(--color-footer);
  padding: 72px 0 0;
  color: rgba(255,255,255,0.6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 48px;
}

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

.footer-brand .brand-text {
  color: #fff;
  font-size: 18px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255,255,255,0.6);
  margin: 16px 0 20px;
  max-width: 320px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social-btn {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 50%;
  color: #fff;
  font-size: 16px;
  transition: all .2s ease;
}

.footer-social-btn:hover {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
  transform: translateY(-2px);
}

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

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

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  margin-bottom: 10px;
  transition: color .2s ease;
}

.footer-col a:hover {
  color: #fff;
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-underline-offset: 6px;
}

.footer-contact p {
  font-size: 14px;
  margin-bottom: 10px;
}

.footer-contact i {
  color: var(--color-primary);
  margin-right: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

@media (max-width: 1024px) {
  .main-nav {
    gap: 0;
  }

  .main-nav a {
    padding: 8px 8px;
    font-size: 13px;
  }

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

@media (max-width: 640px) {
  .container-custom {
    padding: 0 16px;
  }

  .menu-toggle {
    display: inline-flex;
    order: 0;
  }

  .header-inner .brand-logo {
    order: 1;
  }

  .header-actions {
    order: 2;
  }

  .header-actions .search-btn {
    display: none;
  }

  .header-actions .btn {
    padding: 0 16px;
    font-size: 14px;
    height: 40px;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--color-surface);
    padding: 0 16px;
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    box-shadow: 0 20px 30px rgba(11,31,27,0.08);
  }

  .main-nav.open {
    max-height: 500px;
    padding: 12px 16px 16px;
  }

  .main-nav a {
    width: 100%;
    padding: 12px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--color-border);
  }

  .main-nav a:last-child {
    border-bottom: none;
  }

  .main-nav a.active {
    border-bottom: 2px solid var(--color-primary);
  }

  .article-tdk {
    padding-top: calc(var(--header-height) + 28px);
    padding-bottom: 28px;
  }

  .article-head h1 {
    font-size: 24px;
  }

  .article-meta {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-body {
    padding: 36px 0 48px;
  }

  .related-section {
    padding: 60px 0;
  }

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

  .related-thumb {
    height: 140px;
  }

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

  .footer-brand p {
    max-width: 100%;
  }

  .back-link-wrap {
    padding: 24px 0 48px;
  }
}

/* roulang page: category2 */
:root {
  --color-primary: #0D7A5F;
  --color-primary-dark: #095E49;
  --color-primary-light: #E3F2EC;
  --color-accent: #E8632A;
  --color-accent-hover: #C94E1B;
  --color-bg: #F6F8F7;
  --color-surface: #FFFFFF;
  --color-text: #1F2A27;
  --color-text-secondary: #5A6D67;
  --color-border: #DCE6E2;
  --color-footer: #0B1F1B;
  --color-muted: #8A9A94;
  --radius-card: 14px;
  --radius-button: 10px;
  --radius-image: 12px;
  --shadow-card: 0 2px 12px rgba(13,122,95,0.06);
  --shadow-card-hover: 0 4px 20px rgba(13,122,95,0.14);
  --transition-base: all 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; transition: var(--transition-base); }
a:hover { color: var(--color-primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
input, textarea { font-family: inherit; }

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

/* ===================== 头部导航 ===================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: rgba(255,255,255,0.96);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(13,122,95,0.08);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.header-logo svg {
  width: 36px;
  height: 22px;
  flex-shrink: 0;
}
.header-logo .brand-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.main-nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: 8px;
  transition: color 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}
.main-nav a:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
}
.main-nav a:hover::after {
  transform: scaleX(1);
}
.main-nav a.active {
  color: var(--color-primary);
  font-weight: 600;
}
.main-nav a.active::after {
  transform: scaleX(1);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.header-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 20px;
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-button);
  transition: background 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}
.header-download-btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(13,122,95,0.25);
}
.header-download-btn:active {
  transform: translateY(1px);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: background 0.3s ease;
}
.nav-toggle:hover {
  background: var(--color-primary-light);
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===================== 分类页 Hero (矮版) ===================== */
.category-hero {
  position: relative;
  height: 240px;
  background: linear-gradient(135deg, #e8f4ef 0%, #d3ece3 50%, #bce0d4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  margin-top: 64px;
  padding: 40px 24px;
}
.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 100' fill='none' stroke='%230D7A5F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M10 50c0-20 12-33 30-33s30 13 30 33-12 33-30 33S10 70 10 50z'/%3E%3Cpath d='M70 50h60l-15-18'/%3E%3Cpath d='M70 50h60l-15 18'/%3E%3Ccircle cx='28' cy='50' r='3' fill='%230D7A5F'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 100px;
  opacity: 0.06;
  pointer-events: none;
}
.category-hero .hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.category-hero h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.category-hero .hero-line {
  width: 40px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 4px;
  margin: 0 auto 16px;
}
.category-hero p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 580px;
  margin: 0 auto;
}

/* ===================== 通用区块 ===================== */
.section-padding {
  padding: 100px 0;
}
.section-title-wrap {
  margin-bottom: 48px;
  text-align: center;
}
.section-title-wrap h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: 12px;
}
.section-title-wrap .section-sub {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}
.section-title-left {
  text-align: left;
  margin-bottom: 40px;
}
.section-title-left h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: 10px;
}
.section-title-left p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 560px;
  line-height: 1.6;
}

/* ===================== 快速上手流程 ===================== */
.steps-section {
  background: var(--color-surface);
  padding: 100px 0;
}
.steps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 32px;
  margin-top: 16px;
}
.step-card {
  position: relative;
  padding: 32px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  transition: var(--transition-base);
  text-align: center;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(13,122,95,0.3);
}
.step-number {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  background: var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  font-family: SFMono-Regular, Consolas, monospace;
  transition: var(--transition-base);
}
.step-card:hover .step-number {
  background: var(--color-primary);
  color: #fff;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===================== 新手必知功能 ===================== */
.features-section {
  background: var(--color-bg);
  padding: 100px 0;
}
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 16px;
}
.feature-card {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--color-primary);
  transition: height 0.35s ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(13,122,95,0.3);
}
.feature-card:hover::before {
  height: 100%;
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 20px;
  transition: var(--transition-base);
}
.feature-card:hover .feature-icon {
  background: var(--color-primary);
  color: #fff;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ===================== 典型使用场景 ===================== */
.scenarios-section {
  background: var(--color-surface);
  padding: 100px 0;
}
.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 28px;
  margin-top: 16px;
}
.scenario-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition-base);
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(13,122,95,0.3);
}
.scenario-img {
  height: 160px;
  overflow: hidden;
}
.scenario-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-card:hover .scenario-img img {
  transform: scale(1.05);
}
.scenario-body {
  padding: 24px;
}
.scenario-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.scenario-body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===================== FAQ ===================== */
.faq-section {
  background: var(--color-bg);
  padding: 100px 0;
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  margin-top: 16px;
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item:hover {
  border-color: rgba(13,122,95,0.4);
}
.faq-item.open {
  border-color: rgba(13,122,95,0.4);
  box-shadow: 0 2px 12px rgba(13,122,95,0.06);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  height: 56px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  transition: background 0.2s ease;
  outline: none;
  background: transparent;
  width: 100%;
  text-align: left;
}
.faq-question:hover {
  background: var(--color-primary-light);
}
.faq-question:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  border-radius: 12px 12px 0 0;
}
.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  position: relative;
  transition: transform 0.3s ease;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--color-accent);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.faq-icon::before {
  width: 20px;
  height: 2px;
  top: 9px;
  left: 0;
}
.faq-icon::after {
  width: 2px;
  height: 20px;
  top: 0;
  left: 9px;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  border-top: 0 solid var(--color-border);
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 16px 24px;
  border-top-width: 1px;
}

/* ===================== CTA 大区 ===================== */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 80px 0;
  text-align: center;
}
.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 12px;
}
.cta-inner .cta-sub {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 28px;
  line-height: 1.6;
}
.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 48px;
  padding: 0 36px;
  background: #fff;
  color: var(--color-primary) !important;
  font-size: 16px;
  font-weight: 700;
  border-radius: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}
.btn-cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  background: var(--color-primary-light);
}
.btn-cta-primary:active {
  transform: translateY(1px);
}
.btn-cta-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
  font-size: 18px;
  transition: all 0.3s ease;
}
.btn-cta-circle:hover {
  background: #fff;
  color: var(--color-primary);
  border-color: #fff;
  transform: translateY(-2px);
}
.cta-security {
  margin-top: 24px;
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}

/* ===================== 相关推荐 ===================== */
.related-section {
  background: var(--color-surface);
  padding: 80px 0;
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 16px;
}
.related-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(13,122,95,0.3);
}
.related-card .related-img {
  height: 160px;
  overflow: hidden;
}
.related-card .related-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.related-card:hover .related-img img {
  transform: scale(1.05);
}
.related-card .related-body {
  padding: 20px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.related-card .related-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.4;
}
.related-card .related-body p {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: auto;
}

/* ===================== 页脚 ===================== */
.site-footer {
  background: var(--color-footer);
  padding: 72px 0 0;
  color: rgba(255,255,255,0.6);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .brand-logo svg {
  width: 40px;
  height: 24px;
}
.footer-brand .brand-text {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 320px;
  color: rgba(255,255,255,0.6);
}
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
  font-size: 16px;
  transition: all 0.3s ease;
}
.footer-social-btn:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  padding: 5px 0;
  transition: color 0.25s ease;
}
.footer-col a:hover {
  color: #fff;
  text-decoration: underline;
  text-decoration-color: var(--color-primary);
  text-underline-offset: 4px;
}
.footer-col p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-col p i {
  width: 16px;
  text-align: center;
  color: rgba(255,255,255,0.4);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

/* ===================== 响应式 ===================== */
@media screen and (max-width: 1024px) {
  .main-nav a { padding: 8px 8px; font-size: 13px; }
  .header-download-btn { padding: 0 14px; }
}

@media screen and (max-width: 768px) {
  .section-padding, .steps-section, .features-section, .scenarios-section, .faq-section { padding: 60px 0; }
  .steps-grid { grid-template-columns: 1fr; gap: 20px; }
  .features-grid { grid-template-columns: 1fr; gap: 20px; }
  .scenarios-grid { grid-template-columns: 1fr; gap: 20px; }
  .related-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .header-inner { padding: 0 16px; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.35s ease, opacity 0.35s ease;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .main-nav a {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 8px;
  }
  .main-nav a::after { display: none; }
  .header-actions { gap: 8px; }
  .header-download-btn { font-size: 13px; padding: 0 14px; height: 38px; }
  .nav-toggle { display: flex; }
  .category-hero { height: 200px; margin-top: 64px; }
  .category-hero h1 { font-size: 26px; }
  .section-title-wrap h2 { font-size: 26px; }
  .section-title-left h2 { font-size: 26px; }
  .cta-inner h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media screen and (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .btn-cta-primary { width: 100%; justify-content: center; }
  .header-download-btn { display: none; }
}