/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --ink: #171512;
  --ink-2: #1d1a17;
  --ink-3: #2b2722;
  --paper: #f2ede4;
  --paper-2: #e9e1d2;
  --paper-3: #f7f3ec;
  --copper: #b3763a;
  --copper-bright: #c98e52;
  --copper-dark: #8a5730;
  --moss: #2f463c;
  --moss-light: #3e5c50;
  --gray-1: #5f5850;
  --gray-2: #8a8278;
  --gray-3: #b0a89d;
  --gray-4: #d6cfc4;
  --line-light: rgba(23, 21, 18, 0.08);
  --line-mid: rgba(23, 21, 18, 0.14);
  --line-dark: rgba(255, 255, 255, 0.1);
  --radius-card: 8px;
  --radius-btn: 6px;
  --radius-pill: 999px;
  --shadow-warm: 0 4px 20px rgba(23, 21, 18, 0.08);
  --shadow-hover: 0 10px 32px rgba(23, 21, 18, 0.14);
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", "STSong", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  --container: 1200px;
  --gap-section: 96px;
}
/* ========== Reset ========== */
*, *::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: 1.8;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 64px;
}
img { max-width: 100%; display: block; object-fit: cover; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input { font-family: inherit; outline: none; border: none; }
ul, ol { list-style: none; }
section { position: relative; }
/* ========== 容器 ========== */
.container { max-width: var(--container); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
/* ========== 按钮 ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: var(--radius-btn);
  font-size: 15px; font-weight: 600; line-height: 1.4;
  cursor: pointer; transition: all .25s ease; border: 1px solid transparent;
  text-decoration: none; white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; }
.btn-primary { background: var(--copper); color: var(--ink); }
.btn-primary:hover { background: var(--copper-bright); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(179, 118, 58, .3); }
.btn-primary:active { transform: translateY(1px); box-shadow: none; }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,.55); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.95); color: var(--ink); border-color: #fff; }
.btn-ghost:active { transform: translateY(1px); }
.btn-dark { background: var(--ink); color: var(--paper); }
.btn-dark:hover { background: var(--ink-3); transform: translateY(-1px); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 15px 38px; font-size: 16px; }
/* ========== 徽章 ========== */
.badge {
  display: inline-flex; align-items: center;
  padding: 4px 14px; border-radius: var(--radius-pill);
  font-size: 12px; font-weight: 600; letter-spacing: .02em;
  background: var(--ink); color: var(--paper);
  transition: all .2s ease;
}
.badge-copper { background: var(--copper); color: var(--ink); }
.badge-moss { background: var(--moss); color: #e8e4dc; }
.badge-outline { background: transparent; border: 1px solid var(--line-mid); color: var(--gray-1); }
.badge:hover { border-color: var(--copper); }
/* ========== 导航 ========== */
.site-header {
  position: sticky; top: 0; z-index: 200;
  background: var(--ink);
  box-shadow: 0 2px 16px rgba(0,0,0,.3);
}
.header-top {
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.header-top-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 6px;
  background: var(--copper); color: var(--ink);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-serif); font-weight: 900; font-size: 16px;
}
.brand-text {
  font-family: var(--font-serif); font-size: 18px; font-weight: 700;
  color: var(--paper); letter-spacing: .02em;
  white-space: nowrap;
}
.header-actions { display: flex; align-items: center; gap: 14px; }
.search-box {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius-btn);
  padding: 7px 14px;
  width: 220px;
  transition: all .25s ease;
}
.search-box:focus-within { border-color: var(--copper); box-shadow: 0 0 0 2px rgba(179,118,58,.25); }
.search-box svg { flex-shrink: 0; opacity: .6; }
.search-box input {
  background: transparent; color: var(--paper); font-size: 13px;
  width: 100%;
}
.search-box input::placeholder { color: rgba(255,255,255,.45); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--paper); border-radius: 2px; transition: all .3s ease; }
.header-nav {
  background: rgba(23,21,18,.94);
  backdrop-filter: blur(12px);
}
.nav-inner {
  display: flex; align-items: center; gap: 4px;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-top: 0; padding-bottom: 0;
}
.nav-inner::-webkit-scrollbar { display: none; }
.nav-link {
  position: relative;
  display: inline-flex; align-items: center;
  padding: 12px 16px;
  font-size: 14px; font-weight: 500;
  color: rgba(255,255,255,.72);
  white-space: nowrap;
  transition: color .2s ease;
}
.nav-link:hover { color: var(--paper); }
.nav-link.active { color: var(--copper-bright); font-weight: 600; }
.nav-link.active::after {
  content: ''; position: absolute; left: 16px; right: 16px; bottom: 0;
  height: 2px; background: var(--copper); border-radius: 2px;
}
/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex; align-items: center;
  background: var(--ink) url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(23,21,18,.82) 0%, rgba(23,21,18,.6) 45%, rgba(23,21,18,.35) 100%);
  z-index: 1;
}
.hero-content { position: relative; z-index: 2; padding-top: 60px; padding-bottom: 60px; max-width: 800px; }
.hero-kicker {
  display: inline-block;
  font-family: var(--font-serif); font-style: italic;
  font-size: 13px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--copper-bright);
  margin-bottom: 18px;
  border-bottom: 1px solid rgba(179,118,58,.4);
  padding-bottom: 6px;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: 46px; font-weight: 900; line-height: 1.3;
  color: var(--paper);
  margin-bottom: 20px;
  letter-spacing: 0;
}
.hero-subline {
  font-size: 17px; line-height: 1.9;
  color: rgba(255,255,255,.82);
  margin-bottom: 32px;
  max-width: 600px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex; align-items: center; gap: 0;
  border-top: 1px solid rgba(255,255,255,.14);
  padding-top: 28px;
}
.stat-item {
  flex: 1; text-align: left;
  padding: 0 24px;
  border-left: 1px solid rgba(255,255,255,.1);
}
.stat-item:first-child { border-left: none; padding-left: 0; }
.stat-number {
  font-family: var(--font-serif);
  font-size: 38px; font-weight: 800;
  color: var(--paper); line-height: 1.2;
}
.stat-label {
  font-size: 13px; color: rgba(255,255,255,.55);
  margin-top: 4px; letter-spacing: .04em;
}
/* ========== 板块基础 ========== */
.section-pad { padding: 72px 0; }
.section-pad-sm { padding: 48px 0; }
.section-head { margin-bottom: 48px; }
.section-head.kicker-wrap { margin-bottom: 12px; }
.section-kicker {
  font-family: var(--font-serif); font-style: italic;
  font-size: 13px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--copper); display: block; margin-bottom: 8px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 32px; font-weight: 800; line-height: 1.35;
  color: var(--ink);
  display: flex; align-items: center; gap: 16px;
}
.section-title .num {
  font-size: 20px; font-weight: 700;
  color: var(--copper);
  font-style: italic;
}
.section-desc {
  font-size: 15px; color: var(--gray-1);
  margin-top: 10px; max-width: 600px; line-height: 1.8;
}
/* ========== 卖点三连 ========== */
.feature-grid {
  display: grid;
  grid-template-columns: 1.618fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.feature-main {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--paper-3);
  border: 1px solid var(--line-light);
  box-shadow: var(--shadow-warm);
  display: flex; flex-direction: column;
  transition: box-shadow .3s ease, transform .3s ease;
}
.feature-main:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.feature-main .feature-img { position: relative; height: 280px; overflow: hidden; }
.feature-main .feature-img img { width: 100%; height: 100%; transition: transform .5s ease; }
.feature-main:hover .feature-img img { transform: scale(1.03); }
.feature-main .feature-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(23,21,18,.55), transparent 40%);
}
.feature-body { padding: 28px 28px 24px; flex: 1; display: flex; flex-direction: column; }
.feature-num {
  font-family: var(--font-serif); font-size: 52px; font-weight: 900;
  color: transparent; -webkit-text-stroke: 1px var(--copper);
  line-height: 1; margin-bottom: 10px;
}
.feature-title { font-family: var(--font-serif); font-size: 22px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.feature-desc { font-size: 14px; color: var(--gray-1); line-height: 1.7; flex: 1; }
.feature-link { margin-top: 16px; font-size: 14px; font-weight: 600; color: var(--copper); display: inline-flex; align-items: center; gap: 6px; }
.feature-link:hover { color: var(--copper-dark); }
.feature-link svg { transition: transform .2s ease; }
.feature-link:hover svg { transform: translateX(4px); }
.feature-list { display: flex; flex-direction: column; gap: 24px; }
.feature-item {
  flex: 1;
  background: var(--paper-3);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-card);
  padding: 24px;
  display: flex; gap: 16px;
  transition: all .3s ease;
  box-shadow: var(--shadow-warm);
}
.feature-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.feature-item-num {
  font-family: var(--font-serif); font-size: 40px; font-weight: 900;
  color: transparent; -webkit-text-stroke: 1px var(--moss);
  line-height: 1; flex-shrink: 0;
}
.feature-item-content h3 { font-family: var(--font-serif); font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.feature-item-content p { font-size: 13px; color: var(--gray-1); line-height: 1.65; }
.feature-tag { margin-top: 8px; }
/* ========== 场景演示 ========== */
.scene-section {
  position: relative;
  background: var(--ink-2) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  overflow: hidden;
}
.scene-section::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(23,21,18,.85) 0%, rgba(23,21,18,.65) 60%, rgba(23,21,18,.45) 100%);
  z-index: 1;
}
.scene-content { position: relative; z-index: 2; max-width: 720px; padding: 100px 0; }
.scene-quote {
  font-family: var(--font-serif);
  font-size: 28px; font-weight: 700; line-height: 1.6;
  color: var(--paper);
  border-left: 4px solid var(--moss-light);
  padding-left: 24px;
  margin-bottom: 28px;
}
.scene-desc { font-size: 15px; color: rgba(255,255,255,.75); line-height: 1.9; margin-bottom: 16px; }
.scene-desc + .scene-desc { margin-bottom: 32px; }
.scene-actions { margin-top: 10px; }
/* ========== 合集目录 ========== */
.collection-section { background: var(--paper-3); }
.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.collection-card {
  background: var(--paper);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-card);
  padding: 24px;
  position: relative;
  transition: all .3s ease;
  box-shadow: var(--shadow-warm);
}
.collection-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); border-color: var(--line-mid); }
.collection-card .count {
  display: inline-block;
  background: var(--moss); color: #ece8e0;
  font-size: 12px; border-radius: var(--radius-pill);
  padding: 3px 12px; margin-bottom: 14px;
}
.collection-card h3 { font-family: var(--font-serif); font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.collection-card p { font-size: 13px; color: var(--gray-1); line-height: 1.65; margin-bottom: 14px; }
.collection-link { font-size: 13px; font-weight: 600; color: var(--copper); display: inline-flex; align-items: center; gap: 4px; }
.collection-link:hover { color: var(--copper-dark); }
/* ========== 社会认同 ========== */
.social-section { background: var(--paper); }
.social-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}
.testimonial-list { display: flex; flex-direction: column; gap: 24px; }
.testimonial-item {
  background: var(--paper-3);
  border-left: 3px solid var(--moss);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  padding: 22px 26px;
  box-shadow: var(--shadow-warm);
}
.testimonial-item .quote-icon { font-family: var(--font-serif); font-size: 36px; color: var(--copper); line-height: 1; margin-bottom: 8px; }
.testimonial-item blockquote { font-family: var(--font-serif); font-size: 18px; line-height: 1.7; color: var(--ink); font-style: italic; }
.testimonial-item .meta { margin-top: 12px; font-size: 13px; color: var(--gray-2); display: flex; gap: 12px; align-items: center; }
.testimonial-item .meta .dot { width: 3px; height: 3px; background: var(--gray-3); border-radius: 50%; }
.data-side .data-card {
  background: var(--ink);
  border-radius: var(--radius-card);
  padding: 28px;
  color: var(--paper);
}
.data-side .data-card h3 { font-family: var(--font-serif); font-size: 20px; font-weight: 700; margin-bottom: 20px; }
.data-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-dark);
}
.data-row:last-child { border-bottom: none; }
.data-row .value { font-family: var(--font-serif); font-size: 30px; font-weight: 800; color: var(--copper-bright); }
.data-row .label { font-size: 14px; color: rgba(255,255,255,.6); }
/* ========== 安全体系 ========== */
.safety-section { background: var(--paper-2); }
.safety-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.safety-card {
  background: var(--paper-3);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  text-align: center;
  transition: all .3s ease;
}
.safety-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.safety-icon {
  width: 52px; height: 52px;
  background: var(--moss); color: #e8e4dc;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.safety-icon svg { width: 24px; height: 24px; }
.safety-card h3 { font-family: var(--font-serif); font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.safety-card p { font-size: 13px; color: var(--gray-1); line-height: 1.6; }
/* ========== FAQ ========== */
.faq-section { background: var(--paper); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--line-mid);
}
.faq-item:first-child { border-top: 1px solid var(--line-mid); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 22px 8px;
  font-size: 16px; font-weight: 600; color: var(--ink);
  font-family: var(--font-sans);
  transition: color .2s ease;
}
.faq-question:hover { color: var(--copper); }
.faq-question .faq-icon {
  width: 24px; height: 24px; flex-shrink: 0;
  border: 1px solid var(--line-mid); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; transition: all .3s ease; color: var(--copper);
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--copper); color: #fff; border-color: var(--copper); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height .4s ease;
}
.faq-answer-inner { padding: 0 8px 22px; font-size: 14px; color: var(--gray-1); line-height: 1.8; }
/* ========== 底部CTA ========== */
.cta-section { position: relative; background: var(--ink-2); overflow: hidden; }
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
  opacity: .18;
}
.cta-inner { position: relative; z-index: 1; text-align: center; padding: 100px 24px; }
.cta-inner h2 { font-family: var(--font-serif); font-size: 34px; font-weight: 800; color: var(--paper); margin-bottom: 12px; }
.cta-inner p { font-size: 15px; color: rgba(255,255,255,.65); margin-bottom: 28px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
/* ========== 页脚 ========== */
.site-footer { background: var(--ink); color: var(--gray-3); padding-top: 64px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-brand .brand-mark { background: var(--copper); color: var(--ink); }
.footer-brand .brand-text { color: var(--paper); font-family: var(--font-serif); font-size: 17px; font-weight: 700; }
.footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.5); margin-bottom: 20px; max-width: 340px; }
.footer-col h4 { font-family: var(--font-serif); font-size: 15px; color: var(--paper); margin-bottom: 16px; font-weight: 700; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,.5); transition: color .2s ease; }
.footer-col ul li a:hover { color: var(--copper-bright); }
.footer-bottom {
  border-top: 1px solid var(--line-dark);
  padding: 20px 0;
  font-size: 13px; color: rgba(255,255,255,.35);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,.35); }
.footer-bottom a:hover { color: var(--copper-bright); }
/* ========== 固定转化条 ========== */
.fixed-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
  background: rgba(23,21,18,.92);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line-dark);
  padding: 10px 0;
}
.fixed-bar-missive {
  max-width: var(--container);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
}
.fixed-bar-missive .text { font-size: 15px; color: var(--paper); font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fixed-bar-missive .btn { flex-shrink: 0; }
/* ========== 响应式 ========== */
@media (max-width: 992px) {
  .feature-grid { grid-template-columns: 1fr; }
  .feature-main .feature-img { height: 220px; }
  .collection-grid { grid-template-columns: repeat(2, 1fr); }
  .safety-grid { grid-template-columns: repeat(3, 1fr); }
  .social-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  :root { --gap-section: 64px; }
  .section-pad { padding: 56px 0; }
  .hero { min-height: 70vh; }
  .hero h1 { font-size: 32px; }
  .hero-subline { font-size: 15px; }
  .stat-number { font-size: 28px; }
  .stat-item { padding: 0 12px; }
  .section-title { font-size: 26px; }
  .search-box { display: none; }
  .header-top-inner { padding-top: 10px; padding-bottom: 10px; }
  .nav-toggle { display: inline-flex; }
  .header-actions .btn { display: none; }
  .header-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--ink); }
  .header-nav.open { display: block; }
  .nav-inner { flex-direction: column; align-items: stretch; padding: 8px 0; overflow: visible; }
  .nav-link { padding: 14px 24px; border-bottom: 1px solid rgba(255,255,255,.06); }
  .nav-link.active::after { display: none; }
  .nav-link.active { background: rgba(179,118,58,.12); color: var(--copper-bright); }
  .collection-grid { grid-template-columns: 1fr; }
  .safety-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .fixed-bar-missive .text { font-size: 13px; max-width: 65%; }
  .fixed-bar-missive .btn { padding: 9px 18px; font-size: 14px; min-width: 120px; }
  .scene-quote { font-size: 22px; }
  .cta-inner { padding: 64px 24px; }
  .cta-inner h2 { font-size: 28px; }
}
@media (max-width: 576px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .hero h1 { font-size: 28px; }
  .hero-stats { flex-wrap: wrap; }
  .stat-item { padding: 8px 0; border-left: none; border-bottom: 1px solid rgba(255,255,255,.08); flex: 1 1 100%; }
  .stat-item:first-child { padding-left: 0; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .feature-main .feature-img { height: 180px; }
  .feature-item { flex-direction: column; }
  .feature-item-num { font-size: 32px; }
  .faq-question { font-size: 15px; }
  .fixed-bar-missive { padding: 0 16px; }
  .fixed-bar-missive .text { max-width: 55%; }
}
/* ========== 通用工具 ========== */
.text-copper { color: var(--copper); }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }

/* roulang page: category1 */
:root {
  --color-primary: #171512;
  --color-primary-light: #1f1c19;
  --color-secondary: #f2ede4;
  --color-secondary-dark: #e9e1d2;
  --color-accent: #b3763a;
  --color-accent-light: #c0864a;
  --color-accent-dark: #9a6530;
  --color-dark-green: #2f463c;
  --color-text: #2b2825;
  --color-text-light: #6b6560;
  --color-text-lighter: #8d8782;
  --color-border: rgba(43, 40, 37, 0.12);
  --color-border-dark: rgba(255, 255, 255, 0.1);
  --color-bg: #f7f4ee;
  --color-bg-card: #fbf9f5;
  --color-white: #ffffff;
  --shadow-card: 0 4px 20px rgba(23, 21, 18, 0.08);
  --shadow-card-hover: 0 8px 28px rgba(23, 21, 18, 0.12);
  --radius-card: 8px;
  --radius-btn: 6px;
  --radius-badge: 999px;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-max: 1200px;
  --transition-base: 0.25s ease;
  --space-section: 96px;
  --space-group: 36px;
}
*,
*::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: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 64px;
}
img {
  max-width: 100%;
  display: block;
  object-fit: cover;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
input {
  font-family: inherit;
}
ul,
ol {
  list-style: none;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 12px 26px;
  border-radius: var(--radius-btn);
  transition: all var(--transition-base);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--color-accent-light);
  outline-offset: 2px;
}
.btn-outline {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
}
.btn-outline:hover {
  background: var(--color-secondary);
  color: var(--color-primary);
  border-color: var(--color-secondary);
}
.btn-outline:active {
  transform: translateY(1px);
}
.btn-outline:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.6);
  outline-offset: 2px;
}
.btn-dark {
  background: var(--color-primary);
  color: #fff;
}
.btn-dark:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
}
.btn-sm {
  padding: 9px 18px;
  font-size: 14px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  padding: 6px 14px;
  border-radius: var(--radius-badge);
  background: var(--color-primary);
  color: var(--color-secondary);
  letter-spacing: 0.02em;
  transition: all var(--transition-base);
}
.badge-accent {
  background: var(--color-accent);
  color: #fff;
}
.badge-outline {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: var(--color-secondary);
}
.section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
  font-family: var(--font-serif);
}
.section-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: 16px;
}
.section-desc {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 680px;
  line-height: 1.85;
}
.eyebrow-en {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--color-text-lighter);
  display: block;
  margin-bottom: 8px;
}
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  .section-title {
    font-size: 26px;
  }
  .section-desc {
    font-size: 15px;
  }
  :root {
    --space-section: 64px;
  }
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
}
.header-top {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.header-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-btn);
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-secondary);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-btn);
  padding: 0 14px;
  height: 40px;
  width: 200px;
  transition: border-color var(--transition-base);
}
.search-box:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(179, 118, 58, 0.18);
}
.search-box svg {
  flex-shrink: 0;
}
.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--color-secondary);
  font-size: 14px;
  width: 100%;
}
.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-secondary);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.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);
}
.header-nav {
  background: rgba(23, 21, 18, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 10px 24px;
  align-items: center;
}
.nav-inner::-webkit-scrollbar {
  display: none;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-badge);
  white-space: nowrap;
  transition: all var(--transition-base);
}
.nav-link:hover {
  color: var(--color-secondary);
  background: rgba(255, 255, 255, 0.08);
}
.nav-link.active {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
}
@media (max-width: 992px) {
  .search-box {
    width: 150px;
  }
}
@media (max-width: 768px) {
  .header-top-inner {
    height: 60px;
  }
  .brand-text {
    font-size: 17px;
  }
  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 18px;
  }
  .search-box {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary);
  }
  .header-nav.open {
    display: block;
  }
  .nav-inner {
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    overflow-x: visible;
  }
  .nav-link {
    padding: 12px 16px;
    border-radius: var(--radius-btn);
    font-size: 15px;
  }
  .header-cta {
    display: none;
  }
}

/* ===== Category Hero ===== */
.category-hero {
  position: relative;
  min-height: 36vh;
  display: flex;
  align-items: center;
  background-image: linear-gradient(90deg, rgba(23, 21, 18, 0.78), rgba(23, 21, 18, 0.42)), url('/assets/images/coverpic/cover-1.webp');
  background-size: cover;
  background-position: center 35%;
  background-color: var(--color-primary);
  padding: 72px 0;
  overflow: hidden;
}
.category-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 40%, transparent 40%, rgba(23, 21, 18, 0.3) 100%);
  pointer-events: none;
}
.category-hero .container {
  position: relative;
  z-index: 2;
}
.category-hero-content {
  max-width: 780px;
}
.hero-badge {
  margin-bottom: 18px;
}
.category-hero h1 {
  font-family: var(--font-serif);
  font-size: 42px;
  font-weight: 800;
  line-height: 1.28;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.01em;
}
.category-hero-desc {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
  max-width: 620px;
}
.hero-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-meta-value {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--color-secondary);
  line-height: 1.2;
}
.hero-meta-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}
@media (max-width: 768px) {
  .category-hero {
    min-height: 44vh;
    padding: 48px 0;
  }
  .category-hero h1 {
    font-size: 28px;
  }
  .category-hero-desc {
    font-size: 15px;
  }
  .hero-meta {
    gap: 18px;
  }
  .hero-meta-value {
    font-size: 20px;
  }
}

/* ===== Content List ===== */
.content-section {
  padding: var(--space-section) 0;
  background: var(--color-bg);
}
.content-section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 16px;
}
.content-section-header .section-desc {
  margin-bottom: 0;
}
.content-list {
  display: flex;
  flex-direction: column;
}
.content-item {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base), padding-left var(--transition-base);
  border-radius: 0 8px 8px 0;
}
.content-item:first-child {
  padding-top: 4px;
}
.content-item:last-child {
  border-bottom: none;
}
.content-item:hover {
  background: rgba(233, 225, 210, 0.4);
  padding-left: 12px;
}
.content-item-img {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-secondary-dark);
  flex-shrink: 0;
}
.content-item-img img {
  width: 100%;
  height: 100%;
  transition: transform 0.5s ease, filter 0.3s ease;
}
.content-item:hover .content-item-img img {
  transform: scale(1.04);
  filter: saturate(1.08);
}
.content-item-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}
.content-item-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  background: var(--color-secondary-dark);
  color: var(--color-text-light);
  border: 1px solid transparent;
  transition: all var(--transition-base);
}
.content-item:hover .tag-chip {
  background: var(--color-secondary);
}
.content-item h3 {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 10px;
  color: var(--color-primary);
  transition: color var(--transition-base);
}
.content-item:hover h3 {
  color: var(--color-accent);
}
.content-item-summary {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: 14px;
}
.content-item-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--color-text-lighter);
}
.content-item-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.content-item-meta .meta-sep {
  width: 1px;
  height: 12px;
  background: var(--color-border);
  display: inline-block;
}
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: auto;
  transition: gap var(--transition-base);
}
.read-more:hover {
  gap: 8px;
}
@media (max-width: 992px) {
  .content-item {
    grid-template-columns: 240px 1fr;
    gap: 20px;
  }
}
@media (max-width: 768px) {
  .content-item {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px 0;
  }
  .content-item:hover {
    padding-left: 4px;
  }
  .content-item-img {
    aspect-ratio: 16 / 9;
  }
  .content-item h3 {
    font-size: 18px;
  }
  .content-item-summary {
    font-size: 14px;
  }
}

/* ===== Featured / Recommended ===== */
.featured-section {
  padding: var(--space-section) 0;
  background: var(--color-primary);
  color: var(--color-secondary);
  position: relative;
  overflow: hidden;
}
.featured-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(179, 118, 58, 0.18), transparent 70%);
  pointer-events: none;
}
.featured-header {
  margin-bottom: 40px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.featured-header .section-title {
  color: var(--color-secondary);
  margin-bottom: 0;
}
.featured-header .section-desc {
  color: rgba(255, 255, 255, 0.65);
  max-width: 480px;
  font-size: 15px;
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.featured-item {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  transition: padding var(--transition-base);
}
.featured-item:hover {
  padding-left: 8px;
}
.featured-num {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 10px;
  display: block;
  letter-spacing: 0.1em;
}
.featured-item h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--color-secondary);
  transition: color var(--transition-base);
}
.featured-item:hover h3 {
  color: var(--color-accent-light);
}
.featured-item p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.75;
  margin-bottom: 14px;
}
.featured-item-meta {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
@media (max-width: 992px) {
  .featured-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .featured-item {
    padding: 20px 0;
  }
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--color-secondary);
}
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1.618fr;
  gap: 56px;
  align-items: start;
}
.faq-left {
  position: sticky;
  top: 120px;
}
.faq-left .section-title {
  margin-bottom: 12px;
}
.faq-left .section-desc {
  margin-bottom: 24px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}
.faq-item.open {
  border-color: rgba(179, 118, 58, 0.4);
  box-shadow: var(--shadow-card);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-primary);
  transition: color var(--transition-base);
}
.faq-question:hover {
  color: var(--color-accent);
}
.faq-question:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: var(--radius-card);
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-secondary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  flex-shrink: 0;
  transition: all var(--transition-base);
  line-height: 1;
}
.faq-item.open .faq-icon {
  background: var(--color-accent);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
}
@media (max-width: 992px) {
  .faq-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .faq-left {
    position: static;
  }
}

/* ===== CTA Band ===== */
.cta-band {
  position: relative;
  padding: 72px 0;
  background-image: linear-gradient(100deg, rgba(23, 21, 18, 0.92), rgba(23, 21, 18, 0.65)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  text-align: center;
}
.cta-band-inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}
.cta-band h2 {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.35;
}
.cta-band p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
@media (max-width: 768px) {
  .cta-band {
    background-attachment: scroll;
    padding: 56px 0;
  }
  .cta-band h2 {
    font-size: 24px;
  }
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  .cta-actions .btn {
    width: 100%;
  }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary);
  color: var(--color-secondary);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.footer-brand .brand-mark {
  width: 36px;
  height: 36px;
  font-size: 18px;
}
.footer-brand .brand-text {
  font-size: 18px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.55);
  max-width: 380px;
  margin-bottom: 20px;
}
.footer-col h4 {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition-base), padding-left var(--transition-base);
}
.footer-col ul li a:hover {
  color: var(--color-accent-light);
  padding-left: 6px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.38);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.38);
}
.footer-bottom a:hover {
  color: var(--color-accent-light);
}
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    padding: 20px 0;
  }
}

/* ===== Sticky Bar ===== */
.sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(23, 21, 18, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
}
.sticky-bar-text {
  font-size: 14px;
  color: var(--color-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sticky-bar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.sticky-bar .btn {
  font-size: 14px;
  padding: 10px 20px;
}
.sticky-bar-close {
  display: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}
.sticky-bar-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}
@media (max-width: 768px) {
  .sticky-bar {
    padding: 8px 12px;
    min-height: 56px;
  }
  .sticky-bar-text {
    font-size: 13px;
    max-width: 50%;
  }
  .sticky-bar .btn {
    padding: 9px 16px;
    font-size: 13px;
  }
  .sticky-bar-close {
    display: flex;
  }
}