@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;700;900&display=swap');

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Outfit', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #f5f0e8;
  color: #172623;
  line-height: 1.7;
  min-width: 320px;
  overflow-x: hidden;
}

/* ===== 可访问性 ===== */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ===== CSS 变量 ===== */
:root {
  --mint: #5cc6b0;
  --sand: #d4c4a8;
  --dark: #172623;
  --earth: #c67b5c;
  --olive: #6b7b3c;
  --cream: #f5f0e8;
  --warm-white: #faf8f4;
  --shadow-soft: 0 4px 24px rgba(23,38,35,0.10);
  --shadow-hover: 0 8px 36px rgba(23,38,35,0.16);
  --radius-card: 4px;
  --radius-organic: 12px;
  --nav-height: 68px;
  --anchor-height: 44px;
  --sticky-offset: calc(var(--nav-height) + var(--anchor-height));
}

/* ===== 链接 ===== */
a { color: inherit; text-decoration: none; }
a:hover { color: var(--mint); }
a:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; border-radius: 2px; }

/* ===== 图片 ===== */
img { display: block; max-width: 100%; height: auto; }

/* ===== ASIDE 导航 (契约：aside > nav > ul > li > a) ===== */
.site-nav-aside {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark);
  box-shadow: 0 2px 12px rgba(23,38,35,0.18);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--nav-height);
  gap: 16px;
}

.main-nav ul {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav-left { justify-content: flex-end; }
.nav-right { justify-content: flex-start; }

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 12px;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--sand);
  border-radius: var(--radius-card);
  transition: color 0.2s ease-out, background 0.2s ease-out;
  min-height: 44px;
  white-space: nowrap;
}

.nav-link:hover, .nav-link:focus-visible {
  color: var(--mint);
  background: rgba(92,198,176,0.10);
}

.brand-center {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 4px 8px;
}

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

.brand-text {
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--mint);
  text-transform: uppercase;
  white-space: nowrap;
}

.nav-search {
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(212,196,168,0.12);
  border-radius: 20px;
  padding: 4px 4px 4px 14px;
  margin-left: 8px;
  flex-shrink: 0;
  min-height: 44px;
}

.search-input {
  background: none;
  border: none;
  outline: none;
  color: var(--sand);
  font-family: inherit;
  font-size: 0.82rem;
  width: 120px;
  min-height: 36px;
}

.search-input::placeholder { color: rgba(212,196,168,0.5); }

.search-btn {
  background: var(--mint);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--dark);
  flex-shrink: 0;
  transition: background 0.2s ease-out;
  min-width: 40px;
}

.search-btn:hover { background: #4ab39e; }

/* ===== 粘性锚点条 ===== */
.sticky-anchor-bar {
  background: rgba(23,38,35,0.96);
  border-top: 1px solid rgba(212,196,168,0.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.anchor-nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.anchor-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  height: var(--anchor-height);
}

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

.anchor-list .nav-link {
  font-size: 0.76rem;
  padding: 10px 10px;
  color: rgba(212,196,168,0.75);
  min-height: 44px;
}

.anchor-list .nav-link:hover { color: var(--mint); }

/* ===== 各 article 的 scroll-margin-top ===== */
article[id] { scroll-margin-top: var(--sticky-offset); }

/* ===== HERO ===== */
.hero-section {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--dark);
}

.hero-bg-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(120px, 22vw, 320px);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: rgba(92,198,176,0.06);
  pointer-events: none;
  user-select: none;
  z-index: 1;
  line-height: 1;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.45;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(23,38,35,0.72) 0%,
    rgba(23,38,35,0.45) 50%,
    rgba(198,123,92,0.25) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 48px 24px;
  max-width: 760px;
}

.hero-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mint);
  margin-bottom: 16px;
}

.hero-h1 {
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--warm-white);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--sand);
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  padding: 14px 36px;
  background: var(--mint);
  color: var(--dark);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  border-radius: var(--radius-card);
  transition: background 0.22s ease-out, transform 0.18s ease-out, box-shadow 0.22s ease-out;
  min-height: 48px;
}

.hero-cta:hover {
  background: #4ab39e;
  color: var(--dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(92,198,176,0.28);
}

/* ===== 主内容区 ===== */
.site-main { background: var(--cream); }

/* 契约：main > article > figure/aside */
.content-body-section {
  display: grid;
  grid-template-columns: 1fr 260px;
  grid-template-rows: auto;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
  gap: 48px;
  position: relative;
}

.content-deco-figure {
  grid-column: 1 / -1;
  grid-row: 1;
  height: 6px;
  background: linear-gradient(90deg, var(--mint), var(--sand), var(--earth));
  border-radius: 3px;
  overflow: hidden;
  position: relative;
  margin-bottom: 8px;
}

.deco-grain {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.4'/%3E%3C/svg%3E");
  opacity: 0.35;
  mix-blend-mode: overlay;
}

.content-aside {
  grid-column: 2;
  grid-row: 2 / 4;
  position: sticky;
  top: calc(var(--sticky-offset) + 24px);
  align-self: start;
}

.aside-inner {
  background: var(--dark);
  border-radius: var(--radius-organic);
  padding: 28px 22px;
  box-shadow: var(--shadow-soft);
}

.aside-brand {
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--mint);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.aside-tagline {
  font-size: 0.82rem;
  color: var(--sand);
  line-height: 1.6;
  margin-bottom: 20px;
}

.aside-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-link {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  font-size: 0.82rem;
  color: rgba(212,196,168,0.75);
  border-radius: var(--radius-card);
  border-left: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  min-height: 44px;
  line-height: 1.5;
}

.aside-link:hover {
  color: var(--mint);
  border-left-color: var(--mint);
  background: rgba(92,198,176,0.08);
}

.content-main-col {
  grid-column: 1;
  grid-row: 2;
}

/* ===== 正文内容样式 ===== */
.content-main-col h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--dark);
  margin-top: 56px;
  margin-bottom: 20px;
  padding-top: 40px;
  border-top: 2px solid var(--sand);
  position: relative;
}

.content-main-col h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }

.content-main-col h2 span { display: inline; }

.content-main-col h3 {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--dark);
  margin-top: 36px;
  margin-bottom: 14px;
}

.content-main-col h3 span { display: inline; }

.content-main-col p {
  font-size: 1rem;
  line-height: 1.8;
  color: #2a3e3a;
  margin-bottom: 18px;
  max-width: 68ch;
}

.content-main-col ul, .content-main-col ol {
  margin: 0 0 20px 22px;
  line-height: 1.8;
  color: #2a3e3a;
}

.content-main-col li { margin-bottom: 8px; font-size: 1rem; }

.content-main-col strong { color: var(--dark); font-weight: 700; }

.content-main-col em { color: var(--earth); font-style: italic; }

.content-main-col blockquote {
  border-left: 4px solid var(--mint);
  padding: 16px 24px;
  background: rgba(92,198,176,0.06);
  border-radius: 0 var(--radius-organic) var(--radius-organic) 0;
  margin: 28px 0;
  font-style: italic;
  color: #2a3e3a;
}

.content-main-col section {
  margin-bottom: 12px;
}

.content-main-col img {
  border-radius: var(--radius-organic);
  box-shadow: var(--shadow-soft);
  margin: 28px 0;
}

/* ===== 页脚 (契约：footer > section×n) ===== */
.site-footer {
  background: var(--dark);
  color: var(--sand);
  margin-top: 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px 48px;
}

.footer-logo { margin-bottom: 16px; }
.footer-logo-img { height: 36px; width: auto; }

.footer-brand-name {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--mint);
  text-transform: uppercase;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(212,196,168,0.7);
  max-width: 340px;
  margin-bottom: 20px;
}

.footer-palette {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.palette-dot {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.1);
  display: inline-block;
}

.footer-links-col {
  display: flex;
  align-items: flex-start;
  padding-top: 4px;
}

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  font-size: 0.88rem;
  color: rgba(212,196,168,0.7);
  padding: 10px 0;
  min-height: 44px;
  transition: color 0.2s;
  border-bottom: 1px solid transparent;
}

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

/* 页脚联系区 */
.footer-contact {
  background: rgba(92,198,176,0.07);
  border-top: 1px solid rgba(212,196,168,0.12);
  border-bottom: 1px solid rgba(212,196,168,0.12);
  padding: 48px 24px;
  max-width: 100%;
}

.footer-contact-title {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--mint);
  letter-spacing: 0.04em;
  margin-bottom: 10px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.footer-contact-title span { display: inline; }

.footer-contact-desc {
  font-size: 0.9rem;
  color: rgba(212,196,168,0.7);
  margin-bottom: 24px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.subscribe-form {
  display: flex;
  gap: 0;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.subscribe-input {
  flex: 1;
  border: none;
  background: rgba(245,240,232,0.95);
  color: var(--dark);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 14px 18px;
  min-height: 50px;
  outline: none;
}

.subscribe-input::placeholder { color: rgba(23,38,35,0.4); }

.subscribe-btn {
  background: var(--mint);
  color: var(--dark);
  border: none;
  padding: 14px 28px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  min-height: 50px;
  letter-spacing: 0.06em;
  transition: background 0.2s ease-out;
  white-space: nowrap;
}

.subscribe-btn:hover { background: #4ab39e; }

/* 页脚底栏 */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copyright {
  font-size: 0.8rem;
  color: rgba(212,196,168,0.5);
}

.footer-legal {
  font-size: 0.78rem;
  color: rgba(212,196,168,0.4);
  text-align: right;
}

/* ===== Scroll Reveal 动效 ===== */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  }
  .reveal.visible {
    opacity: 1;
    transform: none;
  }
  .hero-cta:hover { transform: translateY(-2px); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .content-body-section {
    grid-template-columns: 1fr;
    padding: 40px 16px;
  }
  .content-aside {
    grid-column: 1;
    grid-row: auto;
    position: static;
  }
  .aside-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    padding: 18px 16px;
  }
  .aside-brand { margin-bottom: 0; }
  .aside-tagline { display: none; }
  .aside-nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
  }
  .content-deco-figure { grid-row: 1; }
  .content-main-col { grid-row: auto; }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px 32px;
  }
}

@media (max-width: 768px) {
  .main-nav {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 16px;
    gap: 8px;
  }
  .nav-left, .nav-right {
    display: none;
  }
  .brand-center { flex: 1; }
  .nav-search { margin-left: auto; }
  .search-input { width: 90px; }
  .site-nav-aside { position: sticky; top: 0; }
}

@media (max-width: 600px) {
  :root {
    --nav-height: 56px;
    --anchor-height: 44px;
  }
  .hero-section { min-height: 70vh; }
  .hero-content { padding: 32px 16px; }
  .hero-h1 { font-size: 2rem; }
  .anchor-list .nav-link {
    font-size: 0.7rem;
    padding: 10px 8px;
    min-height: 44px;
  }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-legal { text-align: left; }
  .subscribe-form { flex-direction: column; border-radius: var(--radius-card); overflow: visible; }
  .subscribe-input { border-radius: var(--radius-card) var(--radius-card) 0 0; }
  .subscribe-btn { border-radius: 0 0 var(--radius-card) var(--radius-card); }
  .content-body-section { padding: 32px 14px; }
}

/* ===== 质感装饰 ===== */
.site-main::before {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, var(--earth) 0%, var(--mint) 50%, var(--sand) 100%);
}

/* ===== 卡片样式（正文内部如有） ===== */
.content-main-col .card {
  background: var(--warm-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  padding: 24px 28px;
  margin: 24px 0;
  transition: box-shadow 0.22s ease-out, transform 0.18s ease-out;
}

.content-main-col .card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}