@charset "utf-8";

/* =========================================================
   DU Meter 中文官网 - 公共样式 common.css
   主题色：#228153   浅色主题
   ========================================================= */

:root {
  --brand: #228153;
  --brand-dark: #1a6843;
  --brand-light: #2ea36a;
  --brand-soft: #e8f4ee;
  --brand-softer: #f3faf6;

  --ink: #16201b;
  --ink-soft: #44574d;
  --ink-mute: #6c7c73;

  --line: #e4ebe7;
  --bg: #ffffff;
  --bg-alt: #f6f9f7;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;

  --shadow-sm: 0 2px 8px rgba(24, 60, 42, 0.06);
  --shadow: 0 12px 32px rgba(24, 60, 42, 0.10);
  --shadow-lg: 0 24px 60px rgba(24, 60, 42, 0.16);

  --maxw: 1180px;
  --header-h: 76px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--brand-dark); }

h1, h2, h3, h4 { margin: 0; line-height: 1.3; letter-spacing: .2px; }

/* 中英文混排：西文与数字字距优化 */
.latin { font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 88px 0; }
.section--alt { background: var(--bg-alt); }

.section__head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}
.section__eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}
.section__title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  color: var(--ink);
}
.section__desc {
  margin-top: 16px;
  font-size: 17px;
  color: var(--ink-soft);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: transform .18s ease, box-shadow .25s ease, background .2s ease;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(34, 129, 83, 0.30);
}
.btn--primary:hover {
  background: var(--brand-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(34, 129, 83, 0.38);
}

.btn--ghost {
  background: #fff;
  color: var(--brand-dark);
  border-color: var(--line);
}
.btn--ghost:hover {
  border-color: var(--brand);
  color: var(--brand-dark);
  background: var(--brand-softer);
}

.btn--lg { padding: 16px 30px; font-size: 16px; }

/* ---------- 通用卡片 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: #d3e4da;
}

/* ---------- 内页横幅（可复用模板） ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 64px) 0 64px;
  background: linear-gradient(165deg, var(--brand-softer) 0%, #fff 60%, var(--brand-soft) 100%);
  text-align: center;
}
.page-hero::after {
  content: "";
  position: absolute;
  top: -140px; right: -100px;
  width: 460px; height: 460px;
  background: radial-gradient(circle, rgba(46,163,106,.16), transparent 70%);
  pointer-events: none;
}
.page-hero__inner { position: relative; z-index: 2; max-width: 820px; margin: 0 auto; padding: 0 24px; }
.page-hero__eyebrow { font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--brand); }
.page-hero__title { font-size: clamp(30px, 5vw, 48px); font-weight: 900; color: var(--ink); margin: 14px 0 0; letter-spacing: -.5px; }
.page-hero__desc { margin: 18px auto 0; max-width: 660px; font-size: 17px; color: var(--ink-soft); }

/* ---------- 正文排版（可复用模板） ---------- */
.prose { font-size: 16px; color: var(--ink-soft); line-height: 1.85; }
.prose p { margin: 0 0 16px; }
.prose h3 { font-size: 22px; font-weight: 800; color: var(--ink); margin: 32px 0 12px; }
.prose h4 { font-size: 17px; font-weight: 700; color: var(--ink); margin: 22px 0 10px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose code { background: var(--brand-soft); color: var(--brand-dark); padding: 2px 7px; border-radius: 6px; font-size: 14px; }
.prose a { font-weight: 600; }

/* ---------- 工具类 ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }

/* ---------- 响应式基础 ---------- */
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .container { padding: 0 18px; }
  body { font-size: 15.5px; }
}

/* 尊重用户的减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}