/* ============================================================
   北京至铖商贸有限公司 门户网站 — 全站样式 v3
   设计语言：生物基绿色系 + 现代科技感 + 分子结构签名元素
   遵循 frontend-design skill：token 化、克制动效、质量底线
   ============================================================ */

:root {
  /* —— 色板（4-6 个命名色，克制使用） —— */
  --green-900: #0C2B1A;   /* 最深 · 背景/深区 */
  --green-800: #123823;
  --green-700: #1E7A46;   /* 主绿 · 品牌色 */
  --green-600: #2E9E5E;   /* 亮绿 · hover/强调 */
  --green-500: #58C184;   /* 高亮 · 点缀 */
  --gold: #D9A92E;        /* 金色 · 稀有/荣誉 */
  --ink: #0F1A14;         /* 正文主色 */
  --ink-2: #44554C;       /* 次级文字 */
  --ink-3: #77867E;       /* 弱化文字 */
  --line: #E3EBE5;        /* 边框 */
  --line-strong: #CFDED4;
  --bg: #FFFFFF;
  --bg-soft: #F4F8F5;     /* 浅区 */
  --bg-soft-2: #EAF3EC;   /* 更浅绿区 */
  --glass: rgba(255,255,255,.72);

  /* —— 字体 —— */
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Noto Sans SC", "Segoe UI", Roboto, Arial, sans-serif;
  --display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
             "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  /* —— 圆角/阴影 —— */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --shadow-sm: 0 2px 10px rgba(12, 43, 26, .06);
  --shadow-md: 0 8px 30px rgba(12, 43, 26, .1);
  --shadow-lg: 0 20px 60px rgba(12, 43, 26, .16);
  --shadow-glow: 0 0 0 1px rgba(88,193,132,.35), 0 12px 40px rgba(46,158,94,.18);

  --grad-brand: linear-gradient(135deg, var(--green-700) 0%, var(--green-900) 100%);
  --grad-soft: linear-gradient(135deg, #EAF6EE 0%, #F7FBF8 100%);
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  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(--green-700); text-decoration: none; transition: color .2s; }
a:hover { color: var(--green-600); }
ul { list-style: none; }
.container { width: min(1200px, 92%); margin: 0 auto; }

::selection { background: rgba(46, 158, 94, .22); }

/* 焦点可见性（质量底线） */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--green-600);
  outline-offset: 2px;
}

/* ---------- mono 小标签 ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--green-700);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: currentColor; border-radius: 1px; }
.eyebrow--center::after { content: ""; width: 26px; height: 2px; background: currentColor; border-radius: 1px; }
.on-dark .eyebrow { color: #8FD6AC; }

/* ---------- 章节 ---------- */
.section { padding: 100px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(46,158,94,.22), transparent 60%),
    radial-gradient(700px 400px at -10% 110%, rgba(46,158,94,.14), transparent 60%),
    linear-gradient(165deg, var(--green-900) 0%, #0A2114 100%);
  color: #E8F2EC;
}
.section-head { max-width: 780px; margin: 0 auto 62px; }
.section-head--left { margin-left: 0; }
.sec-num {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 3px;
  color: var(--green-600);
  display: block;
  margin-bottom: 12px;
  font-weight: 600;
}
.section-title {
  font-family: var(--display);
  font-size: clamp(27px, 3.5vw, 38px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: .5px;
}
.section--dark .section-title { color: #fff; }
.section-sub { color: var(--ink-2); margin-top: 16px; font-size: 16.5px; }
.section--dark .section-sub { color: #A9BFB0; }

/* ---------- 按钮（渐变 + 光效） ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  background: var(--grad-brand);
  color: #fff;
  cursor: pointer;
  overflow: hidden;
  transition: transform .2s, box-shadow .25s;
}
.btn::after {  /* shine 光效 */
  content: "";
  position: absolute;
  top: 0; left: -80%;
  width: 50%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.28), transparent);
  transform: skewX(-20deg);
  transition: left .6s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); color: #fff; }
.btn:hover::after { left: 130%; }
.btn:active { transform: translateY(0); }
.btn--outline {
  background: transparent;
  color: var(--green-700);
  border-color: var(--green-700);
}
.btn--outline::after { display: none; }
.btn--outline:hover { background: rgba(30,122,70,.06); box-shadow: none; color: var(--green-700); }
.btn--ghost-light { border-color: rgba(255,255,255,.55); color: #fff; background: transparent; }
.btn--ghost-light::after { display: none; }
.btn--ghost-light:hover { background: rgba(255,255,255,.1); box-shadow: none; }
.btn--light { background: #fff; color: var(--green-900); }
.btn--light:hover { box-shadow: 0 12px 34px rgba(0,0,0,.22); color: var(--green-900); }
.btn .arr { font-family: var(--mono); font-size: 14px; }

/* ---------- 顶部导航（玻璃） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 43, 26, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; flex-direction: column; line-height: 1.25; color: #fff; }
.logo:hover { color: #fff; }
.logo .logo-mark { display: flex; align-items: center; gap: 12px; }
.logo .logo-badge {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--grad-brand);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--display); font-weight: 800; font-size: 18px;
  color: #fff;
  box-shadow: 0 4px 14px rgba(46,158,94,.35);
}
.logo strong { font-size: 19px; font-weight: 800; letter-spacing: 1px; }
.logo small {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 2.5px;
  color: #9FBFAC;
  font-weight: 400;
}
.main-nav { display: flex; align-items: center; gap: 2px; }
.main-nav a {
  color: #C9DCD0;
  font-size: 15px;
  padding: 8px 14px;
  border-radius: 8px;
  position: relative;
  transition: color .2s, background .2s;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 3px;
  height: 2px; border-radius: 2px;
  background: var(--green-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s;
}
.main-nav a:hover { color: #fff; background: rgba(255,255,255,.07); }
.main-nav a:hover::after { transform: scaleX(1); }
.main-nav a.active { color: #fff; background: rgba(46,158,94,.22); }
.main-nav a.active::after { transform: scaleX(1); }
.nav-cta { margin-left: 10px; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }

/* ---------- Hero（左文右分子签名） ---------- */
.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  background:
    radial-gradient(1000px 520px at 88% -12%, rgba(46,158,94,.3), transparent 62%),
    radial-gradient(760px 480px at -8% 115%, rgba(46,158,94,.18), transparent 60%),
    linear-gradient(105deg, #0A2114 0%, #0E331D 100%);
}
.hero::before {  /* 网格点阵 */
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.09) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(720px 520px at 82% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(720px 520px at 82% 30%, #000 20%, transparent 75%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  align-items: center;
  gap: 48px;
  padding: 130px 0 110px;
}
.hero .eyebrow {
  color: #B7E4C8;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 28px;
}
.hero .eyebrow::before, .hero .eyebrow::after { display: none; }
.hero h1 {
  font-family: var(--display);
  font-size: clamp(32px, 4.6vw, 52px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: 1px;
}
.hero h1 .accent {
  color: transparent;
  background: linear-gradient(90deg, #8FD6AC, var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
}
.hero .lead { color: #CFE0D6; margin: 24px 0 38px; font-size: 17.5px; max-width: 600px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* 签名元素：分子结构 */
.molecule { position: relative; display: flex; align-items: center; justify-content: center; }
.molecule svg { width: 100%; max-width: 480px; height: auto; filter: drop-shadow(0 18px 40px rgba(0,0,0,.35)); }
.molecule .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .5;
  pointer-events: none;
}
.molecule .orb--1 { width: 240px; height: 240px; background: rgba(46,158,94,.5); top: -30px; right: -20px; }
.molecule .orb--2 { width: 180px; height: 180px; background: rgba(217,169,46,.32); bottom: -30px; left: -30px; }
.mol-label {
  position: absolute;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: #9FBFAC;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  padding: 6px 14px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.mol-label--tl { top: 6%; left: 4%; }
.mol-label--br { bottom: 8%; right: 2%; }

/* 数据条 */
.stat-strip {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 16px;
}
.stat-strip .stat {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--r-md);
  padding: 24px 18px;
  text-align: center;
  backdrop-filter: blur(8px);
  transition: border-color .25s, background .25s, transform .25s;
}
.stat-strip .stat:hover { border-color: rgba(143,214,172,.5); background: rgba(255,255,255,.08); transform: translateY(-3px); }
.stat-strip .num {
  font-family: var(--display);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.stat-strip .num b { color: var(--gold); }
.stat-strip .num small { font-size: 14px; font-weight: 600; margin-left: 3px; }
.stat-strip .lbl { font-size: 13px; color: #B9CDBF; margin-top: 6px; }

/* ---------- 通用页面头 ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(700px 380px at 85% -20%, rgba(46,158,94,.25), transparent 60%),
    linear-gradient(120deg, var(--green-900) 0%, #0A2114 100%);
  color: #fff;
  padding: 92px 0 76px;
  text-align: center;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.07) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(600px 300px at 50% 0%, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(600px 300px at 50% 0%, #000, transparent 80%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .crumbs { font-family: var(--mono); font-size: 12.5px; letter-spacing: 1px; color: #9FBFAC; margin-bottom: 16px; }
.page-hero .crumbs a { color: #C9DCD0; }
.page-hero .eyebrow { color: #8FD6AC; justify-content: center; margin-bottom: 14px; }
.page-hero h1 { font-family: var(--display); font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.page-hero p { color: #B7C9BE; margin-top: 14px; max-width: 640px; margin-inline: auto; }

/* ---------- 卡片 ---------- */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 34px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s, border-color .25s;
  position: relative;
}
.card::before {  /* 顶部渐变描边 */
  content: "";
  position: absolute;
  top: 0; left: 16%; right: 16%;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: linear-gradient(90deg, transparent, var(--green-500), transparent);
  opacity: 0;
  transition: opacity .3s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.card:hover::before { opacity: 1; }
.card .icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--grad-soft);
  border: 1px solid var(--line);
  color: var(--green-700);
  margin-bottom: 20px;
  transition: transform .3s;
}
.card:hover .icon { transform: scale(1.06) rotate(-4deg); }
.card .icon svg { width: 26px; height: 26px; }
.card h3 { font-family: var(--display); font-size: 19px; color: var(--ink); margin-bottom: 12px; letter-spacing: .3px; }
.card p { color: var(--ink-2); font-size: 15px; }
.card .more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 18px; font-weight: 600; font-size: 14px; color: var(--green-700);
  font-family: var(--mono); letter-spacing: 1px;
}
.card .more:hover { gap: 10px; color: var(--green-600); }
.card .more { transition: gap .2s; }

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 元数据徽标 ---------- */
.meta-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.meta-chip {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .5px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--ink-2);
}
.meta-chip--ok { background: #E7F6EC; color: #15803D; border-color: transparent; }
.meta-chip--acc { background: rgba(30,122,70,.1); color: var(--green-700); border-color: transparent; }

/* ---------- 产品线大卡 ---------- */
.line-card {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  overflow: hidden;
  transition: all .25s;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.line-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); }
.line-card .line-head {
  padding: 36px 36px 22px;
  background:
    radial-gradient(320px 160px at 90% -20%, rgba(88,193,132,.5), transparent 65%),
    var(--grad-brand);
  color: #fff;
  position: relative;
}
.line-card .line-head::after {
  content: attr(data-count);
  font-family: var(--mono);
  position: absolute;
  right: 28px; top: 18px;
  font-size: 42px;
  font-weight: 800;
  color: rgba(255,255,255,.16);
}
.line-card .line-head .lk { font-family: var(--mono); font-size: 11.5px; letter-spacing: 2.5px; color: #B7E4C8; }
.line-card .line-head h3 { font-family: var(--display); font-size: 23px; font-weight: 800; margin-top: 8px; }
.line-card .line-body { padding: 28px 36px 36px; flex: 1; }
.line-card .line-body p { color: var(--ink-2); font-size: 15px; }
.line-card .line-body ul { margin-top: 16px; display: grid; gap: 10px; }
.line-card .line-body li { display: flex; gap: 10px; color: var(--ink-2); font-size: 14.5px; }
.line-card .line-body li::before { content: "✓"; color: var(--green-600); font-weight: 800; flex-shrink: 0; }

/* ---------- 分类网格 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cat-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 28px;
  transition: all .25s;
  position: relative;
}
.cat-item::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(300px 140px at 100% 0%, rgba(46,158,94,.12), transparent 70%);
  opacity: 0;
  transition: opacity .3s;
}
.cat-item:hover { border-color: var(--green-600); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.cat-item:hover::before { opacity: 1; }
.cat-item > * { position: relative; }
.cat-item .sku {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--green-700);
  background: rgba(30,122,70,.1);
  padding: 3px 10px;
  border-radius: 999px;
}
.cat-item h4 { font-family: var(--display); font-size: 17.5px; color: var(--ink); margin: 14px 0 8px; }
.cat-item p { color: var(--ink-2); font-size: 14px; }
.cat-item .more { font-family: var(--mono); font-size: 13px; color: var(--green-700); display: inline-block; margin-top: 14px; }

/* ---------- 明星产品卡 ---------- */
.feat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 30px;
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.feat-card::before {
  content: "";
  position: absolute;
  top: -40px; right: -40px;
  width: 120px; height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46,158,94,.14), transparent 70%);
}
.feat-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); border-color: var(--line-strong); }
.feat-card .prod-tag { font-family: var(--mono); font-size: 11.5px; letter-spacing: 1.5px; color: var(--ink-3); }
.feat-card h3 { font-family: var(--display); font-size: 19px; color: var(--ink); margin: 8px 0 6px; }
.feat-card .spec { font-size: 13.5px; color: var(--ink-2); }
.feat-card .price {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--green-800);
  font-weight: 700;
  margin-top: 14px;
}

/* ---------- Why Us ---------- */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.why-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 32px;
  position: relative;
  transition: all .25s;
}
.why-item:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); }
.why-item .no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--gold);
  display: block;
  margin-bottom: 14px;
}
.why-item h3 { font-family: var(--display); font-size: 18px; color: var(--ink); margin-bottom: 10px; }
.why-item p { color: var(--ink-2); font-size: 14.5px; }

/* ---------- 认证墙 ---------- */
.cert-wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cert-item {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: var(--r-md);
  padding: 28px 20px;
  text-align: center;
  transition: all .25s;
  backdrop-filter: blur(4px);
}
.cert-item:hover { background: rgba(255,255,255,.09); border-color: rgba(88,193,132,.45); transform: translateY(-3px); }
.cert-item .nm { font-family: var(--display); font-size: 17px; font-weight: 800; color: #fff; letter-spacing: 1px; }
.cert-item .ds { font-size: 12.5px; color: #9FBFAC; margin-top: 6px; line-height: 1.6; }
.cert-item .code { font-family: var(--mono); font-size: 11px; color: #8FD6AC; margin-top: 8px; display: block; }

/* ---------- 应用场景 ---------- */
.app-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 26px;
  transition: all .25s;
}
.app-item:hover { border-color: var(--green-600); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.app-item h4 { font-family: var(--display); color: var(--ink); font-size: 17px; margin-bottom: 8px; }
.app-item p { color: var(--ink-2); font-size: 14px; }

/* ---------- 客户墙 ---------- */
.client-wall { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 20px; }
.client-wall span {
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 9px 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: all .2s;
  font-family: var(--display);
}
.client-wall span:hover { color: var(--green-700); border-color: var(--green-600); box-shadow: var(--shadow-sm); transform: translateY(-2px); }

/* ---------- 平台 ---------- */
.platform {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
}
.platform .plat-head {
  background:
    radial-gradient(320px 160px at 90% -20%, rgba(88,193,132,.45), transparent 65%),
    var(--grad-brand);
  padding: 44px 46px;
  color: #fff;
}
.platform .plat-head .lk { font-family: var(--mono); font-size: 11.5px; letter-spacing: 2.5px; color: #B7E4C8; }
.platform .plat-head h3 { font-family: var(--display); font-size: 24px; margin: 10px 0 6px; }
.platform .plat-head p { color: #BFD5C7; font-size: 13px; }
.platform .plat-head ul { margin-top: 26px; display: grid; gap: 12px; }
.platform .plat-head li { display: flex; gap: 10px; color: #D9EBE0; font-size: 14.5px; }
.platform .plat-head li::before { content: "◆"; color: var(--gold); font-size: 11px; margin-top: 5px; }
.platform .plat-body { background: #fff; padding: 44px 46px; }
.platform .plat-body h3 { font-family: var(--display); color: var(--ink); margin-bottom: 18px; font-size: 22px; }
.platform .plat-body ul { display: grid; gap: 12px; }
.platform .plat-body li { display: flex; gap: 10px; color: var(--ink-2); font-size: 15px; }
.platform .plat-body li::before { content: "✓"; color: var(--green-600); font-weight: 800; flex-shrink: 0; }

/* ---------- CTA ---------- */
.cta {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(700px 380px at 50% -40%, rgba(88,193,132,.4), transparent 65%),
    var(--grad-brand);
  color: #fff;
  text-align: center;
  padding: 84px 0;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.1) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(600px 300px at 50% 100%, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(600px 300px at 50% 100%, #000, transparent 80%);
  pointer-events: none;
}
.cta .container { position: relative; z-index: 1; }
.cta h2 { font-family: var(--display); font-size: clamp(24px, 3.4vw, 34px); font-weight: 800; }
.cta p { color: #D9EBE0; margin: 16px auto 32px; max-width: 660px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--green-900); color: #AFC4B7; font-size: 14px; }
.footer-main {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 64px 0 44px;
}
.site-footer h4 { color: #fff; font-size: 15px; margin-bottom: 20px; letter-spacing: 1px; font-family: var(--display); }
.site-footer .logo { margin-bottom: 16px; }
.site-footer p { line-height: 2; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #AFC4B7; }
.footer-links a:hover { color: #fff; }
.footer-contact li { margin-bottom: 12px; display: flex; gap: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  text-align: center;
  color: #7E9588;
  font-size: 13px;
}

/* ---------- 内容排版 ---------- */
.prose h2 { font-family: var(--display); font-size: 24px; color: var(--ink); margin: 36px 0 16px; }
.prose h3 { font-family: var(--display); font-size: 19px; color: var(--ink); margin: 26px 0 12px; }
.prose p { color: var(--ink-2); margin-bottom: 14px; }
.prose ul { margin: 12px 0 20px; display: grid; gap: 10px; }
.prose ul li { display: flex; gap: 10px; color: var(--ink-2); }
.prose ul li::before { content: "✓"; color: var(--green-600); font-weight: 800; flex-shrink: 0; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--r-md); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
table { width: 100%; border-collapse: collapse; font-size: 15px; background: #fff; }
th, td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); }
th { background: var(--bg-soft); color: var(--ink); font-weight: 600; white-space: nowrap; font-family: var(--display); }
tr:last-child td { border-bottom: none; }
td { color: var(--ink-2); }
tbody tr { transition: background .15s; }
tbody tr:hover { background: var(--bg-soft); }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 14px; font-weight: 600; color: var(--ink); }
.form-field input, .form-field textarea, .form-field select {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-family: inherit;
  font-size: 15px;
  background: #fff;
  transition: border .2s, box-shadow .2s;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none; border-color: var(--green-600);
  box-shadow: 0 0 0 3px rgba(46,158,94,.14);
}
.form-field textarea { min-height: 130px; resize: vertical; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline li { position: relative; padding: 0 0 28px 12px; }
.timeline li::before {
  content: ""; position: absolute; left: -25px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--green-700); border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--green-700);
}
.timeline h4 { font-family: var(--display); color: var(--ink); font-size: 16px; }
.timeline p { color: var(--ink-2); font-size: 14px; margin-top: 4px; }

/* ---------- 新闻卡片 ---------- */
.news-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-md); padding: 28px; transition: all .25s; }
.news-card:hover { box-shadow: var(--shadow-md); border-color: var(--green-600); transform: translateY(-3px); }
.news-card .date { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); }
.news-card h3 { font-family: var(--display); color: var(--ink); font-size: 17px; margin: 10px 0 8px; line-height: 1.5; }
.news-card p { color: var(--ink-2); font-size: 14px; }
.news-card .tag { font-family: var(--mono); font-size: 11.5px; letter-spacing: 1px; color: var(--green-700); background: rgba(30,122,70,.08); padding: 3px 10px; border-radius: 999px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4, .why-grid, .cert-wall { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .molecule svg { max-width: 380px; }
}

@media (max-width: 768px) {
  .section { padding: 68px 0; }
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--green-900);
    flex-direction: column;
    padding: 16px 4%;
    gap: 4px;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px; }
  .nav-cta { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-inner { padding: 96px 0 84px; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .platform { grid-template-columns: 1fr; }
  .cat-grid, .why-grid, .cert-wall { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 32px; }
  .page-hero { padding: 66px 0 56px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
}