/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #2d5a4d;
  --primary-dark: #1e3f35;
  --primary-light: #4a7c6d;
  --accent: #c8a24b;
  --accent-light: #d9b96e;
  --accent-dark: #a9862f;
  --bg: #f7f4ef;
  --bg-alt: #efe9e0;
  --card: #ffffff;
  --text: #2b2622;
  --text-weak: #7d756c;
  --border: #e5ddd2;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(43, 38, 34, 0.08);
  --shadow-lg: 0 12px 36px rgba(43, 38, 34, 0.12);
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --sidebar-w: 280px;
  --transition: 0.3s ease;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.3;
  margin: 0 0 12px;
  color: var(--text);
}
p { margin: 0 0 16px; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}
::selection { background: var(--accent); color: #fff; }
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== 左侧竖向导航 ===== */
.site-wrapper {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
}
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  background: linear-gradient(180deg, #1e3f35 0%, #142b25 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  padding: 30px 22px 22px;
  z-index: 200;
}
.sidebar .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.brand-mark {
  width: 46px;
  height: 46px;
  background: var(--accent);
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 22px;
  flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(200, 162, 75, 0.35);
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.3;
}
.brand-sub {
  display: block;
  font-size: 11px;
  font-family: var(--font-sans);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.5px;
  margin-top: 2px;
}
.sidebar-nav {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.nav-link i {
  width: 20px;
  text-align: center;
  font-size: 16px;
}
.nav-link:hover {
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
  transform: translateX(3px);
}
.nav-link.active {
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(200, 162, 75, 0.3);
}
.sidebar-search {
  position: relative;
  margin-top: 18px;
}
.sidebar-search input {
  width: 100%;
  padding: 11px 14px 11px 40px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 13px;
  outline: none;
  transition: all var(--transition);
}
.sidebar-search input::placeholder { color: rgba(255, 255, 255, 0.45); }
.sidebar-search input:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.14);
}
.sidebar-search .search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.45);
  font-size: 14px;
}
.sidebar-foot {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 18px;
  margin-top: auto;
}
.sidebar-foot p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  margin-bottom: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
  text-align: center;
  line-height: 1.4;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 63, 53, 0.28);
}
.btn-accent {
  background: var(--accent);
  color: var(--primary-dark);
}
.btn-accent:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 162, 75, 0.35);
}
.btn-outline {
  border-color: var(--primary);
  color: var(--primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
  background: transparent;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  transform: translateY(-2px);
}
.btn-block { width: 100%; }
.btn-lg { padding: 15px 36px; font-size: 16px; }

/* ===== 移动端顶栏 ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 300;
  background: var(--primary-dark);
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}
.mobile-brand {
  color: #fff;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mobile-brand i { color: var(--accent); }
.mobile-menu-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 18px;
  padding: 8px 13px;
  transition: all var(--transition);
}
.mobile-menu-btn:hover { background: rgba(255, 255, 255, 0.2); }
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 150;
  backdrop-filter: blur(2px);
}
.mobile-overlay.show { display: block; }

/* ===== Hero（众筹预热结构） ===== */
.hero {
  position: relative;
  padding: 72px 0 64px;
  background:
    linear-gradient(120deg, rgba(20, 43, 37, 0.96) 0%, rgba(45, 90, 77, 0.88) 55%, rgba(30, 63, 53, 0.75) 100%),
    url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  right: -120px;
  top: -120px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(200, 162, 75, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(8px);
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--accent-light);
  border: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 22px;
}
.hero-tag i { font-size: 13px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 52px;
  align-items: center;
}
.hero h1 {
  font-size: 38px;
  line-height: 1.32;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero-desc {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 26px;
  max-width: 560px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 32px;
}
.hero-badges span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}
.hero-badges i { color: var(--accent-light); }
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-panel {
  background: rgba(255, 255, 255, 0.97);
  border-radius: var(--radius-lg);
  padding: 32px 28px 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  position: relative;
  z-index: 2;
}
.progress-card h3 {
  font-size: 20px;
  text-align: center;
  color: var(--text);
  margin-bottom: 4px;
}
.progress-card > p {
  text-align: center;
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 24px;
}
.progress-ring-wrapper {
  position: relative;
  width: 148px;
  height: 148px;
  margin: 0 auto 22px;
}
.ring-bg {
  fill: none;
  stroke: #eee6dc;
  stroke-width: 10;
}
.ring-progress {
  fill: none;
  stroke: var(--accent);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 326.73;
  stroke-dashoffset: 45.74;
  transform: rotate(-90deg);
  transform-origin: center;
}
.ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.ring-center strong {
  font-family: var(--font-serif);
  font-size: 34px;
  color: var(--primary);
  line-height: 1;
}
.ring-center span {
  font-size: 13px;
  color: var(--text-weak);
  margin-top: 6px;
}
.tier-previews {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.tier-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  transition: all var(--transition);
}
.tier-item:hover {
  border-color: var(--accent);
  background: #fdfaf5;
  transform: translateX(3px);
}
.tier-name {
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.tier-name i { color: var(--accent); font-size: 13px; }
.tier-price {
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 15px;
  font-family: var(--font-serif);
}

/* ===== 通用板块头 ===== */
.section-head {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 44px;
}
.section-tag {
  display: inline-block;
  background: rgba(45, 90, 77, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 32px;
  margin-bottom: 12px;
}
.section-head p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
}

/* ===== 分类入口 ===== */
.category-section {
  padding: 72px 0 56px;
  background: var(--bg);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.category-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 32px 22px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  display: block;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.category-card .cat-icon {
  width: 68px;
  height: 68px;
  border-radius: 20px;
  background: rgba(45, 90, 77, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 28px;
  color: var(--primary);
  transition: all var(--transition);
}
.category-card:hover .cat-icon {
  background: var(--primary);
  color: #fff;
  transform: scale(1.06);
}
.category-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.category-card p {
  font-size: 14px;
  color: var(--text-weak);
  margin: 0;
  line-height: 1.6;
}

/* ===== 功能亮点 ===== */
.features-section {
  padding: 72px 0;
  background: var(--bg-alt);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 36px 28px 32px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}
.feature-card::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 4px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.feature-card:hover::after { transform: scaleX(1); }
.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.feature-card .feat-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(200, 162, 75, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  font-size: 28px;
  color: var(--accent);
}
.feature-card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-weak);
  margin: 0;
  line-height: 1.7;
}

/* ===== 服务范围 ===== */
.services-section {
  padding: 72px 0;
  background: var(--bg);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.service-card .img-wrap {
  overflow: hidden;
  position: relative;
  height: 210px;
}
.service-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.service-card:hover img { transform: scale(1.05); }
.service-card .img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(30, 63, 53, 0.2), transparent 60%);
  pointer-events: none;
}
.service-body {
  padding: 24px 24px 20px;
}
.service-body h3 {
  font-size: 20px;
  margin-bottom: 8px;
}
.service-body p {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 16px;
  line-height: 1.7;
}
.text-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
}
.text-link:hover {
  color: var(--accent-dark);
  gap: 10px;
}

/* ===== 数据指标 ===== */
.stats-section {
  padding: 56px 0;
  background: var(--primary-dark);
  color: #fff;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.stat-item {
  text-align: center;
  padding: 16px;
}
.stat-item strong {
  font-family: var(--font-serif);
  font-size: 50px;
  font-weight: 700;
  color: var(--accent);
  display: block;
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-item span {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.7);
}
.stat-item + .stat-item {
  border-left: 1px solid rgba(255, 255, 255, 0.14);
}

/* ===== 热门专题 ===== */
.topics-section {
  padding: 72px 0;
  background: var(--bg);
}
.topics-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  max-width: 820px;
  margin: 0 auto;
}
.topic-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 11px 24px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.topic-pill:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.topic-pill i {
  color: var(--accent);
  font-size: 13px;
}
.topic-pill:hover i { color: #fff; }

/* ===== 资讯区 ===== */
.news-section {
  padding: 72px 0;
  background: var(--bg-alt);
}
.news-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 30px;
  align-items: start;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-item {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 22px 24px;
  transition: all var(--transition);
  display: block;
}
.news-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(4px);
  border-left: 4px solid var(--accent);
}
.news-item h3 {
  font-size: 17px;
  margin-bottom: 6px;
  transition: color var(--transition);
}
.news-item h3:hover { color: var(--primary); }
.news-item p {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 8px;
  line-height: 1.7;
}
.news-meta {
  font-size: 13px;
  color: var(--text-weak);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.news-meta i { color: var(--accent); }
.news-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.side-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 24px;
}
.side-card h3 {
  font-size: 17px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
}
.side-card ul {
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.side-card ul a {
  font-size: 14px;
  color: var(--text);
  padding-left: 14px;
  position: relative;
  transition: color var(--transition);
}
.side-card ul a::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 18px;
  line-height: 1;
}
.side-card ul a:hover { color: var(--primary); }
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tags-cloud span {
  background: var(--bg);
  color: var(--text-weak);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  transition: all var(--transition);
  cursor: default;
}
.tags-cloud span:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== 平台保障 ===== */
.guarantee-section {
  padding: 64px 0;
  background: var(--bg);
}
.guarantee-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.guarantee-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.guarantee-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}
.guarantee-item i {
  font-size: 30px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}
.guarantee-item h3 {
  font-size: 17px;
  margin-bottom: 5px;
}
.guarantee-item p {
  font-size: 14px;
  color: var(--text-weak);
  margin: 0;
  line-height: 1.6;
}

/* ===== 版本更新 ===== */
.changelog-section {
  padding: 72px 0;
  background: var(--bg-alt);
}
.changelog-list {
  max-width: 780px;
  margin: 0 auto;
  position: relative;
}
.changelog-list::before {
  content: '';
  position: absolute;
  left: 110px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--border);
}
.changelog-item {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  position: relative;
}
.changelog-date {
  min-width: 84px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  height: fit-content;
  margin-top: 4px;
  z-index: 1;
  letter-spacing: 0.5px;
}
.changelog-content {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 26px;
  border: 1px solid var(--border);
  flex: 1;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.changelog-content:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.changelog-content h3 {
  font-size: 17px;
  margin-bottom: 5px;
}
.changelog-content p {
  font-size: 14px;
  color: var(--text-weak);
  margin: 0;
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 72px 0;
  background: var(--bg);
}
.faq-list {
  max-width: 830px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 26px 30px;
  transition: all var(--transition);
}
.faq-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}
.faq-item h3 {
  font-size: 18px;
  margin-bottom: 10px;
  padding-left: 20px;
  position: relative;
}
.faq-item h3::before {
  content: 'Q';
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
}
.faq-item p {
  font-size: 15px;
  color: var(--text-weak);
  line-height: 1.85;
  margin: 0;
  padding-left: 20px;
  position: relative;
}
.faq-item p::before {
  content: 'A';
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  background: var(--primary-light);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background:
    linear-gradient(135deg, rgba(20, 43, 37, 0.94), rgba(45, 90, 77, 0.88)),
    url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
  color: #fff;
  text-align: center;
}
.cta-inner {
  max-width: 720px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-family: var(--font-serif);
  font-size: 34px;
  color: #fff;
  margin-bottom: 16px;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 16px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-buttons .btn-outline-light { border-width: 2px; }

/* ===== Footer ===== */
.site-footer {
  background: #172b24;
  color: rgba(255, 255, 255, 0.68);
  padding: 60px 0 32px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 44px;
  margin-bottom: 40px;
}
.footer-logo {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.footer-logo i { color: var(--accent); }
.footer-brand p {
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.52);
  margin: 0;
}
.footer-links h3,
.footer-contact h3 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 16px;
  font-family: var(--font-sans);
}
.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.52);
  margin-bottom: 9px;
  transition: all var(--transition);
}
.footer-links a:hover { color: var(--accent-light); padding-left: 4px; }
.footer-contact p {
  margin-bottom: 9px;
  color: rgba(255, 255, 255, 0.52);
}
.footer-contact i {
  color: var(--accent);
  margin-right: 8px;
  width: 14px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.38);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.45); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root { --sidebar-w: 240px; }
  .hero h1 { font-size: 31px; }
  .hero-grid { gap: 32px; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { gap: 20px; }
  .stat-item strong { font-size: 40px; }
}

@media (max-width: 768px) {
  .site-wrapper { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    left: -300px;
    width: 280px;
    transition: left 0.35s ease;
    box-shadow: 4px 0 30px rgba(0, 0, 0, 0.3);
  }
  .sidebar.open { left: 0; }
  .mobile-header { display: flex; }
  .hero { padding: 44px 0 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 27px; }
  .hero-badges { gap: 12px; }
  .features-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .guarantee-inner { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; gap: 8px; }
  .stat-item + .stat-item {
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .changelog-list::before { left: 66px; }
  .changelog-date { min-width: 56px; font-size: 12px; }
  .section-head h2 { font-size: 26px; }
  .cta-inner h2 { font-size: 27px; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .category-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .hero-cta .btn { width: 100%; }
  .hero-panel { padding: 24px 18px; }
  .changelog-item { flex-direction: column; gap: 10px; }
  .changelog-list::before { display: none; }
  .changelog-date { align-self: flex-start; }
  .stat-item strong { font-size: 36px; }
  .faq-item { padding: 20px 18px; }
  .news-item { padding: 18px; }
}