@import url('https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@300;400;500;600;700&family=Rubik:wght@300;400;500;600;700&display=swap');

/* ===== 变量 ===== */
:root {
  --mint: #5cc6b0;
  --mint-dark: #3da892;
  --mint-light: #8ddece;
  --sand: #d4c4a8;
  --sand-light: #e8dccc;
  --sand-dark: #b8a88a;
  --ink: #172623;
  --ink-mid: #253e39;
  --ink-light: #3a5a52;
  --text: #e8dccc;
  --text-muted: #a09080;
  --text-dark: #172623;
  --card-bg: #d4c4a8;
  --card-border: #b8a88a;
  --radius: 18px;
  --radius-sm: 10px;
  --radius-lg: 26px;
  --font-main: 'Nunito Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-head: 'Rubik', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --aside-w: 260px;
  --topbar-h: 64px;
  --anchor-h: 44px;
  --content-max: 720px;
  --page-max: 1200px;
  --transition: 0.3s ease-out;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--ink);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--mint); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--mint-light); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ===== 布局骨架 ===== */
.site-wrap {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.site-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ===== 侧边导航 aside ===== */
.site-aside {
  width: var(--aside-w);
  background: var(--ink-mid);
  border-right: 1px solid rgba(92,198,176,0.12);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  transition: transform var(--transition);
  flex-shrink: 0;
}

.aside-nav {
  flex: 1;
  padding: 1.5rem 1rem;
}

.aside-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.aside-nav ul li a {
  display: block;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--sand);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.4;
  transition: background var(--transition), color var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}

.aside-nav ul li a:hover,
.aside-nav ul li a[aria-current="page"] {
  background: rgba(92,198,176,0.15);
  color: var(--mint);
}

.aside-cta {
  padding: 1rem;
  border-top: 1px solid rgba(92,198,176,0.12);
}

/* ===== 顶部栏 ===== */
.topbar {
  height: var(--topbar-h);
  background: var(--ink);
  border-bottom: 1px solid rgba(92,198,176,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 90;
}

.topbar__brand {
  display: flex;
  align-items: center;
}

.topbar__logo {
  height: 40px;
  width: auto;
}

.topbar__name {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: 0.02em;
}

.topbar__name:hover { color: var(--mint-light); }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  min-height: 40px;
  min-width: 40px;
  align-items: center;
  justify-content: center;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--sand);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ===== 锚点条 ===== */
.anchor-bar {
  height: var(--anchor-h);
  background: var(--ink-mid);
  border-bottom: 1px solid rgba(92,198,176,0.1);
  position: sticky;
  top: var(--topbar-h);
  z-index: 80;
  overflow-x: auto;
}

.anchor-bar__inner {
  display: flex;
  align-items: center;
  gap: 0;
  height: 100%;
  padding: 0 1rem;
  white-space: nowrap;
}

.anchor-link {
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 0 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
  min-height: 40px;
  white-space: nowrap;
}

.anchor-link:hover {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

/* ===== 主内容区 ===== */
.page-main {
  flex: 1;
  padding: 0;
}

.wrap {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 2rem 2rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* ===== 页面右侧 aside ===== */
.page-aside {
  position: fixed;
  right: 0;
  top: calc(var(--topbar-h) + var(--anchor-h));
  width: 220px;
  max-height: calc(100vh - var(--topbar-h) - var(--anchor-h));
  overflow-y: auto;
  padding: 1.5rem 1rem;
  border-left: 1px solid rgba(92,198,176,0.1);
  background: var(--ink-mid);
}

.page-aside__inner {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-aside h3 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  color: var(--sand);
  margin-bottom: 0.5rem;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.aside-links li a {
  display: block;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.83rem;
  color: var(--text-muted);
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: color var(--transition), background var(--transition);
}

.aside-links li a:hover {
  color: var(--mint);
  background: rgba(92,198,176,0.1);
}

/* ===== Hero (首页) ===== */
.hero-section {
  min-height: calc(100vh - var(--topbar-h) - var(--anchor-h));
  display: flex;
  align-items: flex-end;
  padding: 4rem 0 3rem;
  position: relative;
  background: linear-gradient(160deg, var(--ink) 0%, var(--ink-mid) 60%, rgba(92,198,176,0.08) 100%);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.3;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  padding: 2rem 2.5rem;
  text-align: left;
}

.hero-badge {
  display: inline-block;
  background: rgba(92,198,176,0.18);
  color: var(--mint);
  border: 1px solid rgba(92,198,176,0.4);
  border-radius: 20px;
  padding: 0.3rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.hero-h1 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--sand);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.hero-date {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  min-height: 44px;
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: var(--mint);
  color: var(--ink);
  border: 2px solid var(--mint);
}

.btn--primary:hover {
  background: var(--mint-dark);
  border-color: var(--mint-dark);
  color: var(--ink);
}

.btn--outline {
  background: transparent;
  color: var(--mint);
  border: 2px solid var(--mint);
}

.btn--outline:hover {
  background: rgba(92,198,176,0.1);
  color: var(--mint-light);
}

.btn--lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
  min-height: 50px;
}

/* ===== 正文容器 ===== */
.content-section {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(212,196,168,0.15);
  border-radius: var(--radius);
  overflow: hidden;
}

.content-body {
  max-width: var(--content-max);
  padding: 2rem 2.5rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--sand-light);
}

.content-body h2, .content-body h3, .content-body h4 {
  font-family: var(--font-head);
  color: var(--text);
  margin: 1.5em 0 0.6em;
  line-height: 1.3;
}

.content-body h2 { font-size: 1.4rem; }
.content-body h3 { font-size: 1.2rem; }
.content-body p { margin-bottom: 1em; }
.content-body ul, .content-body ol { padding-left: 1.5rem; margin-bottom: 1em; }
.content-body ul { list-style: disc; }
.content-body ol { list-style: decimal; }
.content-body li { margin-bottom: 0.4em; }
.content-body a { color: var(--mint); text-decoration: underline; text-underline-offset: 3px; }
.content-body strong { color: var(--text); font-weight: 600; }
.content-body blockquote {
  border-left: 3px solid var(--mint);
  padding: 0.75rem 1.25rem;
  background: rgba(92,198,176,0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5em 0;
  color: var(--sand);
  font-style: italic;
}
.content-body time { color: var(--text-muted); font-size: 0.875rem; }

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  border-radius: var(--radius);
  border: 1.5px solid var(--card-border);
  background: var(--card-bg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--mint);
  transform: translateY(-3px);
}

.card__inner {
  display: block;
  padding: 1.5rem;
  height: 100%;
  color: var(--text-dark);
  text-decoration: none;
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card__title {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}

.card__desc {
  font-size: 0.88rem;
  color: var(--ink-light);
  line-height: 1.6;
  flex: 1;
}

.card__link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--mint-dark);
  margin-top: 0.5rem;
}

/* ===== 眉题 small ===== */
.eyebrow {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--mint);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

/* ===== 各 section h2 ===== */
.features-section h2,
.children-section h2,
.related-section h2,
.pricing-guarantee h2,
.about-values h2,
.contact-channels h2,
.privacy-links h2,
.faq-cta-section h2 {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.5rem;
  line-height: 1.25;
}

/* ===== 子页列表 dl ===== */
.nav-dl {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-dl dt {
  padding: 0.75rem 0 0.1rem;
  border-top: 1px solid rgba(212,196,168,0.15);
}

.nav-dl dt:first-child { border-top: none; }

.nav-dl dt a {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--mint);
  display: inline-block;
  min-height: 40px;
  line-height: 40px;
}

.nav-dl dt a:hover { color: var(--mint-light); }

.nav-dl dd {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding: 0 0 0.75rem;
  line-height: 1.6;
}

.nav-dl dd time {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--mint); }
.breadcrumb span { color: var(--sand); }

/* ===== 日期 ===== */
.pub-date, .mod-date {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  margin-right: 1rem;
}

/* ===== 页头 hero (非首页) ===== */
.page-hero, .feature-hero, .about-hero {
  padding: 3rem 0 1.5rem;
}

.page-hero__content, .feature-hero__content, .about-hero__content {
  max-width: 680px;
}

.page-hero h1, .feature-hero h1, .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.page-sub, .feature-desc, .about-sub {
  font-size: 1rem;
  color: var(--sand);
  line-height: 1.7;
  max-width: 540px;
}

/* ===== 保障格子 (pricing) ===== */
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.guarantee-item {
  background: var(--ink-mid);
  border: 1px solid rgba(92,198,176,0.18);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-start;
}

.guarantee-icon { font-size: 1.5rem; }
.guarantee-text { font-size: 0.9rem; color: var(--sand); line-height: 1.5; }

/* ===== 价值观格子 (about) ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.value-item {
  background: var(--ink-mid);
  border: 1px solid rgba(212,196,168,0.15);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.value-num {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: rgba(92,198,176,0.35);
  line-height: 1;
}

.value-text {
  font-size: 0.95rem;
  color: var(--sand);
  line-height: 1.6;
}

/* ===== 联系渠道 ===== */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.channel-item {
  background: var(--ink-mid);
  border: 1px solid rgba(92,198,176,0.15);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.channel-icon { font-size: 1.75rem; }
.channel-label { font-family: var(--font-head); font-size: 1rem; font-weight: 600; color: var(--text); }
.channel-desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; }
.channel-desc a { color: var(--mint); }

/* ===== FAQ section 内按钮区 ===== */
.faq-cta-section {
  padding: 2rem;
  background: rgba(92,198,176,0.05);
  border: 1px solid rgba(92,198,176,0.15);
  border-radius: var(--radius);
}

.faq-cta-section p {
  color: var(--sand);
  margin-bottom: 1.25rem;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--ink-mid);
  border-top: 1px solid rgba(92,198,176,0.1);
  padding: 2rem 2.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.footer-cta {
  width: 100%;
  text-align: center;
}

.footer-copy {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 2;
}

.footer-copy a {
  color: var(--text-muted);
  margin: 0 0.25rem;
}

.footer-copy a:hover { color: var(--mint); }

/* ===== 动效 Scroll Reveal ===== */
@media (prefers-reduced-motion: no-preference) {
  .reveal-item {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.55s ease-out, transform 0.55s ease-out;
  }

  .reveal-item.is-visible {
    opacity: 1;
    transform: none;
  }

  .reveal-list .reveal-item:nth-child(1) { transition-delay: 0.05s; }
  .reveal-list .reveal-item:nth-child(2) { transition-delay: 0.12s; }
  .reveal-list .reveal-item:nth-child(3) { transition-delay: 0.19s; }
  .reveal-list .reveal-item:nth-child(4) { transition-delay: 0.26s; }
  .reveal-list .reveal-item:nth-child(5) { transition-delay: 0.33s; }
  .reveal-list .reveal-item:nth-child(6) { transition-delay: 0.40s; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal-item { opacity: 1; transform: none; transition: none; }
}

/* ===== 响应式 ===== */
/* 中等屏：隐藏右侧 page-aside，主内容全宽 */
@media (max-width: 1280px) {
  .page-aside { display: none; }
  .wrap { padding: 1.5rem 1.5rem 2.5rem; }
}

/* 平板/小屏：折叠左侧 aside 为抽屉 */
@media (max-width: 860px) {
  .site-wrap { display: block; }

  .site-aside {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    transform: translateX(-100%);
    z-index: 200;
    box-shadow: 4px 0 20px rgba(0,0,0,0.4);
  }

  .site-aside.is-open {
    transform: translateX(0);
  }

  .menu-toggle {
    display: flex;
  }

  .topbar {
    justify-content: center;
  }

  .hero-section {
    min-height: auto;
    padding: 3rem 0 2rem;
  }

  .hero-content {
    padding: 1.5rem 1.5rem;
  }

  .hero-h1 { font-size: 2rem; }

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

  .wrap { padding: 1rem 1rem 2rem; }

  .guarantee-grid,
  .values-grid,
  .channel-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* 手机 */
@media (max-width: 480px) {
  .hero-h1 { font-size: 1.6rem; }
  .hero-actions { flex-direction: column; }
  .btn--lg { width: 100%; }

  .content-body { padding: 1.5rem 1.25rem; }

  .guarantee-grid,
  .values-grid,
  .channel-grid {
    grid-template-columns: 1fr;
  }

  .anchor-bar__inner { gap: 0; padding: 0 0.5rem; }
  .anchor-link { padding: 0 0.6rem; font-size: 0.78rem; }

  .wrap { gap: 2rem; }

  .faq-cta-section { padding: 1.25rem; }
  .faq-cta-section .btn { display: block; width: 100%; margin: 0 0 0.75rem !important; }

  .site-footer { padding: 1.5rem 1rem; }
}

/* ===== 叠加层（移动端菜单打开时） ===== */
.site-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(23,38,35,0.7);
  z-index: 150;
}

.site-overlay.is-active { display: block; }