```css
:root {
  --paper: #fbf7ef;
  --paper-deep: #f1ece3;
  --card: #fffdf7;
  --ink: #26262b;
  --melon: #37a682;
  --melon-soft: #d3eee6;
  --red: #eb5e55;
  --red-soft: #ffd8cf;
  --gold: #f4b942;
  --gold-soft: #ffe8a3;
}

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

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background-color: var(--paper);
  background-image: radial-gradient(rgba(38,38,43,0.035) 1px, transparent 1px);
  background-size: 26px 26px;
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--gold); color: var(--ink); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--melon); border-radius: 6px; border: 2px solid var(--paper); }
::-webkit-scrollbar-thumb:hover { background: #2c7d64; }

/* ============ 核心布局 ============ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section:nth-child(even) {
  background-color: var(--paper-deep);
  background-image: linear-gradient(rgba(38,38,43,0.03) 1px, transparent 1px);
  background-size: 100% 32px;
}

/* ============ 导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(251,247,239,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 2px solid var(--ink);
  box-shadow: 0 3px 0 var(--gold);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.25rem;
  text-decoration: none;
  letter-spacing: -0.02em;
  position: relative;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--melon);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: #fffdf7;
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
  position: relative;
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--gold);
  border-radius: 50%;
  border: 1px solid var(--ink);
  bottom: 6px;
  right: 7px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  padding: 6px 2px;
  transition: color 0.2s;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s;
}

.main-nav a:not(.nav-cta):hover {
  color: var(--red);
}

.main-nav a:not(.nav-cta):hover::after {
  transform: scaleX(1);
}

.nav-cta {
  padding: 8px 22px;
  background: var(--red);
  color: #fffdf7 !important;
  border-radius: 50px;
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  font-weight: 800;
  transition: 0.2s;
}

.nav-cta:hover {
  background: var(--gold);
  color: var(--ink) !important;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--ink);
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: 4px;
  cursor: pointer;
  position: relative;
  z-index: 1002;
  padding: 0;
}

.menu-toggle * {
  display: none;
}

.menu-toggle::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--ink);
  transform: translateY(-50%);
  box-shadow: 0 -8px 0 var(--ink), 0 8px 0 var(--ink);
  transition: 0.3s;
}

/* ============ Hero ============ */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 88% 25%, rgba(244,185,66,0.30) 0%, transparent 26%),
    radial-gradient(circle at 65% 85%, rgba(55,166,130,0.14) 0%, transparent 32%),
    linear-gradient(180deg, #fffdf7 0%, var(--paper) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  right: -140px;
  top: -140px;
  width: 380px;
  height: 380px;
  border: 3px dashed rgba(38,38,43,0.12);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero:not(:has(.container)) {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.hero-content {
  max-width: 680px;
}

.hero-eyebrow {
  display: inline-block;
  background: var(--ink