/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1A1A1A;
  background: #FFFFFF;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul, ol { padding-left: 1.4em; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.6em; letter-spacing: -0.01em; font-weight: 700; color: #0B1F1A; }
p { margin: 0 0 1em; }

/* ===== 设计变量 ===== */
:root {
  --green-900: #002F25;
  --green-800: #004C3F;
  --green-700: #00735C;
  --green-100: #E3F5EF;
  --cream: #FBF7ED;
  --cream-dark: #F1ECD8;
  --ink: #0B1F1A;
  --ink-2: #1A1A1A;
  --muted: #5C5F62;
  --line: #E1E3E5;
  --line-soft: #EEEFF1;
  --bg-soft: #F6F6F7;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px rgba(0,47,37,0.08);
}

/* ===== 布局容器 ===== */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section-sm { padding: 56px 0; }
.bg-cream { background: var(--cream); }
.bg-soft { background: var(--bg-soft); }
.bg-green { background: var(--green-800); color: #fff; }
.bg-green h1, .bg-green h2, .bg-green h3 { color: #fff; }

/* ===== 顶部导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 19px; color: var(--green-800);
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 30px; height: 30px;
  background: var(--green-800);
  border-radius: 7px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 16px;
  font-family: -apple-system, "Helvetica Neue", Arial, sans-serif;
}
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  font-size: 15px; color: var(--ink); font-weight: 500;
  padding: 8px 0; transition: color .15s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--green-700); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 11px 22px;
  background: var(--ink);
  color: #fff !important;
  border-radius: 999px;
  font-weight: 600; font-size: 14.5px;
  transition: transform .15s ease, background .2s ease;
}
.nav-cta:hover { background: var(--green-800); transform: translateY(-1px); }

.menu-toggle {
  display: none;
  background: none; border: none; padding: 8px;
  color: var(--ink);
}
.menu-toggle svg { width: 26px; height: 26px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600; font-size: 16px;
  border: 1.5px solid transparent;
  transition: all .18s ease;
  cursor: pointer; text-align: center;
}
.btn-primary {
  background: var(--ink); color: #fff;
}
.btn-primary:hover { background: var(--green-800); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0,47,37,0.18); }
.btn-secondary {
  background: transparent; color: var(--ink); border-color: var(--ink);
}
.btn-secondary:hover { background: var(--ink); color: #fff; }
.btn-white {
  background: #fff; color: var(--green-800);
}
.btn-white:hover { background: var(--cream); }
.btn-lg { padding: 16px 34px; font-size: 17px; }

/* ===== Hero ===== */
.hero {
  background: var(--cream);
  padding: 96px 0 88px;
  position: relative; overflow: hidden;
}
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 64px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 800;
  color: var(--green-900);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero h1 .accent { color: var(--green-700); }
.hero p.lead {
  font-size: 19px; color: var(--ink-2);
  margin-bottom: 32px;
  max-width: 540px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-note { font-size: 14px; color: var(--muted); margin-top: 18px; }

/* Hero 视觉模拟 */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  margin-left: auto;
}
.dash-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: var(--shadow-md);
  padding: 22px;
  border: 1px solid var(--line-soft);
}
.dash-card.main {
  position: absolute; top: 8%; left: 0; right: 0;
  height: 78%;
}
.dash-card.float {
  position: absolute; bottom: 0; right: -20px;
  width: 56%;
  padding: 18px;
}
.dash-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.dash-title { font-size: 13px; color: var(--muted); font-weight: 500; }
.dash-value { font-size: 28px; font-weight: 800; color: var(--green-900); }
.dash-bar { height: 100%; display: flex; align-items: flex-end; gap: 10px; padding-top: 12px; }
.dash-bar span {
  flex: 1; background: linear-gradient(180deg, var(--green-700), var(--green-800));
  border-radius: 4px 4px 0 0; opacity: 0.85;
}
.dash-bar span:nth-child(1){ height: 40%; }
.dash-bar span:nth-child(2){ height: 65%; }
.dash-bar span:nth-child(3){ height: 50%; }
.dash-bar span:nth-child(4){ height: 80%; }
.dash-bar span:nth-child(5){ height: 92%; }
.dash-bar span:nth-child(6){ height: 70%; opacity: 1; }
.dash-card.float .dash-value { font-size: 22px; color: var(--green-700); }
.tag {
  display: inline-block; padding: 3px 10px;
  background: var(--green-100); color: var(--green-800);
  border-radius: 999px; font-size: 12px; font-weight: 600;
}

/* ===== 信任栏 ===== */
.trust { padding: 36px 0; border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); background: #fff; }
.trust-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  text-align: center;
}
.trust-grid .num { font-size: 30px; font-weight: 800; color: var(--green-800); letter-spacing: -0.01em; }
.trust-grid .lbl { font-size: 14px; color: var(--muted); margin-top: 4px; }

/* ===== 标题块 ===== */
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block; font-size: 13px; font-weight: 600;
  color: var(--green-700); text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(28px, 3.5vw, 40px); margin-bottom: 16px; }
.section-head p { font-size: 17px; color: var(--muted); }

/* ===== 功能卡片 ===== */
.features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 32px 28px;
  transition: border-color .18s ease, transform .18s ease;
}
.feature-card:hover { border-color: var(--green-700); transform: translateY(-3px); }
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--green-100); color: var(--green-800);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { color: var(--muted); font-size: 15px; margin: 0; }

/* ===== 步骤 ===== */
.steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
  counter-reset: step;
}
.step {
  padding: 32px 24px 28px;
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--line-soft);
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block;
  font-size: 13px; font-weight: 700; color: var(--green-700);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.step h3 { font-size: 20px; margin-bottom: 10px; }
.step p { color: var(--muted); font-size: 15px; margin: 0; }

/* ===== 价格卡片 ===== */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  margin-bottom: 32px;
}
.price-card {
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 18px;
  padding: 32px 28px;
  display: flex; flex-direction: column;
  transition: border-color .18s ease, transform .18s ease;
}
.price-card:hover { border-color: var(--green-700); }
.price-card.featured {
  border-color: var(--green-800);
  box-shadow: 0 12px 32px rgba(0,76,63,0.12);
  position: relative;
}
.price-card.featured::before {
  content: "热门选择";
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--green-800); color: #fff;
  padding: 5px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
}
.price-card .plan-name { font-size: 14px; font-weight: 600; color: var(--green-700); letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 6px; }
.price-card .plan-tag-cn { font-size: 22px; font-weight: 700; margin-bottom: 16px; color: var(--ink); }
.price-card .plan-price {
  display: flex; align-items: baseline; gap: 4px;
  margin-bottom: 6px;
}
.price-card .plan-price .currency { font-size: 18px; color: var(--muted); font-weight: 600; }
.price-card .plan-price .amount { font-size: 44px; font-weight: 800; color: var(--green-900); letter-spacing: -0.02em; }
.price-card .plan-price .unit { font-size: 16px; color: var(--muted); }
.price-card .plan-billing { font-size: 13px; color: var(--muted); margin-bottom: 22px; }
.price-card .plan-desc { font-size: 15px; color: var(--muted); margin-bottom: 22px; min-height: 48px; }
.price-card ul {
  list-style: none; padding: 0; margin: 0 0 26px;
  font-size: 14.5px;
}
.price-card ul li {
  padding: 8px 0 8px 26px;
  position: relative; color: var(--ink-2);
  border-bottom: 1px solid var(--line-soft);
}
.price-card ul li:last-child { border-bottom: none; }
.price-card ul li::before {
  content: ""; position: absolute; left: 0; top: 13px;
  width: 16px; height: 16px;
  background: var(--green-100);
  border-radius: 50%;
}
.price-card ul li::after {
  content: ""; position: absolute; left: 4px; top: 17px;
  width: 8px; height: 4px;
  border-left: 2px solid var(--green-800);
  border-bottom: 2px solid var(--green-800);
  transform: rotate(-45deg);
}
.price-card .btn { width: 100%; }
.price-note {
  font-size: 13px; color: var(--muted); text-align: center;
  max-width: 760px; margin: 0 auto;
}

/* ===== 对比表 ===== */
.compare-wrap { overflow-x: auto; margin: 32px 0; }
.compare-table {
  width: 100%; border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  min-width: 720px;
}
.compare-table th, .compare-table td {
  padding: 16px 18px; text-align: left;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
}
.compare-table thead th {
  background: var(--green-900); color: #fff;
  font-weight: 600;
}
.compare-table thead th:first-child { background: var(--green-900); }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table td:first-child { color: var(--muted); font-weight: 500; }
.compare-table td.tick { color: var(--green-700); font-weight: 700; }

/* ===== FAQ ===== */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-item summary {
  list-style: none; cursor: pointer;
  padding: 22px 26px;
  font-weight: 600; font-size: 17px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-size: 24px; font-weight: 400;
  color: var(--green-700);
  transition: transform .2s ease;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item[open] summary { border-bottom: 1px solid var(--line-soft); }
.faq-item .faq-body {
  padding: 18px 26px 24px;
  color: var(--muted); font-size: 15.5px; line-height: 1.75;
}
.faq-item .faq-body p { margin: 0 0 10px; }
.faq-item .faq-body p:last-child { margin-bottom: 0; }

/* ===== CTA Band ===== */
.cta-band {
  background: var(--green-900);
  color: #fff;
  padding: 72px 0;
  text-align: center;
}
.cta-band h2 { color: #fff; font-size: clamp(28px, 3.4vw, 38px); margin-bottom: 16px; }
.cta-band p { color: rgba(255,255,255,0.78); font-size: 18px; max-width: 600px; margin: 0 auto 30px; }

/* ===== 二级页面页头 ===== */
.page-header {
  background: var(--cream);
  padding: 84px 0 64px;
  text-align: center;
}
.page-header h1 { font-size: clamp(34px, 4.5vw, 52px); color: var(--green-900); margin-bottom: 16px; }
.page-header p { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 auto; }

/* ===== 内容块 ===== */
.content-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
  margin-bottom: 80px;
}
.content-row:last-child { margin-bottom: 0; }
.content-row.reverse { direction: rtl; }
.content-row.reverse > * { direction: ltr; }
.content-row h2 { font-size: clamp(26px, 3vw, 34px); margin-bottom: 18px; }
.content-row p { font-size: 16.5px; color: var(--muted); }
.content-row ul { padding-left: 20px; color: var(--ink-2); }
.content-row ul li { margin-bottom: 8px; }
.content-row .visual {
  background: var(--cream); border-radius: 18px; padding: 36px;
  border: 1px solid var(--line-soft);
}

/* 功能详细列表 */
.feature-list-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 36px;
}
.fl-item { display: flex; gap: 14px; align-items: flex-start; padding: 6px 0; }
.fl-item .dot {
  flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%;
  background: var(--green-100); color: var(--green-800);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; margin-top: 2px;
}
.fl-item div h4 { font-size: 16px; margin-bottom: 4px; }
.fl-item div p { margin: 0; font-size: 14.5px; color: var(--muted); }

/* ===== 页脚 ===== */
.footer {
  background: var(--green-900); color: #C5D6D0;
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 56px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand .brand-mark { background: #fff; color: var(--green-900); }
.footer-brand p { color: #95A8A1; font-size: 14.5px; max-width: 340px; line-height: 1.75; }
.footer-col h4 {
  color: #fff; font-size: 14px; text-transform: uppercase;
  letter-spacing: 0.08em; margin-bottom: 18px; font-weight: 600;
}
.footer-col ul {
  list-style: none; padding: 0; margin: 0;
}
.footer-col ul li { padding: 6px 0; font-size: 14.5px; color: #95A8A1; }
.footer-col p { font-size: 14.5px; color: #95A8A1; margin-bottom: 8px; }
.footer-col a { color: #95A8A1; transition: color .15s; }
.footer-col a:hover { color: #fff; }
.socials { display: flex; gap: 12px; margin-top: 14px; }
.socials a {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  transition: all .15s;
}
.socials a:hover { background: #fff; color: var(--green-900); border-color: #fff; }
.socials svg { width: 16px; height: 16px; }
.footer-bottom {
  padding-top: 28px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: #6B7B76;
  flex-wrap: wrap; gap: 12px;
}

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 420px; margin: 0 auto; }
  .features, .steps, .pricing-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .content-row { grid-template-columns: 1fr; gap: 32px; margin-bottom: 56px; }
  .content-row.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .feature-list-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 56px; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .menu-toggle { display: inline-flex; }
  .nav-inner { height: 60px; }
  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute; top: 60px; left: 0; right: 0;
    background: #fff;
    padding: 16px 24px 24px;
    gap: 16px; align-items: stretch;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 20px rgba(0,0,0,0.06);
  }
  .nav.open .nav-cta { text-align: center; }
  .hero h1 { font-size: 36px; }
  .hero p.lead { font-size: 17px; }
  .section-head h2 { font-size: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}