/* ============================================================
   上云付款 ShangyunPay · 官方网站设计系统
   设计定位：专业 / 可信赖 / 简洁
   响应式：移动优先（mobile-first），断点 768px / 1024px
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 品牌色 */
  --primary: #165DFF;
  --primary-dark: #0E42D2;
  --primary-light: #E8F0FF;
  --primary-soft: #F2F6FF;

  /* 辅助色 */
  --wechat: #07C160;   /* 微信绿 */
  --alipay: #1677FF;   /* 支付宝蓝 */
  --success: #00B42A;
  --warning: #FF7D00;
  --danger: #F53F3F;

  /* 中性色 */
  --text: #1D2129;
  --text-2: #4E5969;
  --text-3: #86909C;
  --bg: #FFFFFF;
  --bg-soft: #F7F8FA;
  --bg-deep: #0B1F44;
  --border: #E5E6EB;
  --border-soft: #F0F1F3;

  /* 排版 */
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Hiragino Sans GB", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* 圆角 / 阴影 / 间距 */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(20, 40, 90, 0.06);
  --shadow: 0 8px 28px rgba(20, 40, 90, 0.10);
  --shadow-lg: 0 18px 50px rgba(20, 40, 90, 0.16);
  --container: 1200px;
  --header-h: 64px;
}

/* ---------- 基础重置 ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: var(--text); }
p { color: var(--text-2); }
:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}
.section { padding: 80px 0; }
.section--soft { background: var(--bg-soft); }
.section--deep { background: var(--bg-deep); color: #fff; }
.section--deep h2, .section--deep h3 { color: #fff; }
.section--deep p { color: rgba(255,255,255,.78); }

/* ---------- 通用排版 ---------- */
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 700; letter-spacing: .12em;
  color: var(--primary); text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(26px, 4vw, 38px); margin-bottom: 16px; }
.section-head p { font-size: 17px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: 1.5px solid transparent; cursor: pointer; transition: all .2s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn--ghost { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn--ghost:hover { background: var(--primary-light); }
.btn--light { background: #fff; color: var(--primary); }
.btn--light:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn--outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.btn--outline-light:hover { background: rgba(255,255,255,.12); }
.btn--lg { padding: 15px 34px; font-size: 16px; }
.btn--block { width: 100%; }

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.9);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border-soft);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--text); }
.brand .logo {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), #36BFFA);
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: var(--shadow-sm);
}
.brand .logo span { transform: translateY(-1px); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px; font-size: 15px; color: var(--text-2); font-weight: 500;
  transition: all .15s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--primary-soft); }
.nav-cta { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; transition: .2s; }

/* 移动端菜单面板 */
.mobile-menu {
  position: fixed; inset: var(--header-h) 0 0 0; z-index: 99;
  background: #fff; padding: 16px 20px 32px;
  transform: translateX(100%); transition: transform .25s ease, visibility .25s;
  visibility: hidden;
  display: flex; flex-direction: column; gap: 4px; overflow-y: auto;
}
.mobile-menu.open { transform: translateX(0); visibility: visible; }
.mobile-menu a { padding: 14px 12px; border-radius: 10px; font-size: 16px; color: var(--text-2); border-bottom: 1px solid var(--border-soft); }
.mobile-menu a:hover { color: var(--primary); background: var(--primary-soft); }
.mobile-menu .btn { margin-top: 16px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(22,93,255,.12), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(54,191,250,.10), transparent 55%),
    linear-gradient(180deg, #fff, var(--bg-soft));
  padding: 72px 0 84px;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--border); color: var(--primary);
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}
.hero h1 { font-size: clamp(32px, 5vw, 52px); letter-spacing: -.5px; margin-bottom: 20px; }
.hero h1 .hl { color: var(--primary); }
.hero p.lead { font-size: 18px; color: var(--text-2); margin-bottom: 32px; max-width: 540px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 36px; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: 28px; font-weight: 800; color: var(--text); }
.hero-stats .stat .lbl { font-size: 13px; color: var(--text-3); }
.hero-visual {
  background: linear-gradient(160deg, #fff, var(--primary-soft));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); padding: 26px;
}
.hero-card-row { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; background: #fff; border: 1px solid var(--border-soft); border-radius: 12px; margin-bottom: 12px; }
.hero-card-row .ch { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.wx { background: var(--wechat); } .dot.ali { background: var(--alipay); }
.hero-card-row .amt { font-weight: 800; font-size: 18px; }
.hero-card-foot { font-size: 12px; color: var(--text-3); text-align: center; margin-top: 6px; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .ico {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary); margin-bottom: 18px; font-size: 24px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { font-size: 15px; }

/* ---------- 步骤流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step { position: relative; padding-top: 8px; }
.step .n {
  width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff;
  display: grid; place-items: center; font-weight: 800; font-size: 18px; margin-bottom: 16px;
  box-shadow: 0 6px 16px rgba(22,93,255,.35);
}
.step h4 { font-size: 17px; margin-bottom: 6px; }
.step p { font-size: 14px; }

/* ---------- 信任条 ---------- */
.trustbar { display: flex; flex-wrap: wrap; gap: 28px; justify-content: center; align-items: center; }
.trustbar .item { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,.85); font-weight: 500; }
.trustbar .item .ck { color: #4ADE80; }

/* ---------- 费率表 ---------- */
.price-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.price-table th, .price-table td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--border-soft); font-size: 15px; }
.price-table thead { background: var(--primary); color: #fff; }
.price-table thead th { font-weight: 600; }
.price-table tbody tr:hover { background: var(--primary-soft); }
.price-table .fee { font-weight: 800; color: var(--primary); }
.price-note { font-size: 13px; color: var(--text-3); margin-top: 14px; }

/* ---------- FAQ 手风琴 ---------- */
.faq-item { background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  padding: 20px 22px; font-size: 16px; font-weight: 600; color: var(--text);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.faq-q .plus { transition: transform .2s ease; color: var(--primary); font-size: 22px; line-height: 1; flex: none; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-a .inner { padding: 0 22px 20px; color: var(--text-2); font-size: 15px; }

/* ---------- 关于 / 数据 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-list li { display: flex; gap: 12px; margin-bottom: 14px; align-items: flex-start; }
.about-list .ck { color: var(--primary); font-weight: 800; flex: none; }
.bigstats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.bigstat { background: var(--bg-soft); border-radius: var(--radius); padding: 26px; text-align: center; }
.bigstat .n { font-size: 38px; font-weight: 800; color: var(--primary); }
.bigstat .t { color: var(--text-2); font-size: 14px; margin-top: 4px; }

/* ---------- 联系表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 15px; font-family: var(--font); color: var(--text); background: #fff; transition: border .15s;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { border-color: var(--primary); outline: none; }
.form-field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 13px; color: var(--text-3); margin-top: 10px; }
.contact-info .info-item { display: flex; gap: 14px; margin-bottom: 22px; }
.contact-info .info-item .ico { width: 42px; height: 42px; border-radius: 12px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; font-size: 20px; flex: none; }
.contact-info .info-item h4 { font-size: 15px; margin-bottom: 2px; }
.contact-info .info-item p { font-size: 14px; }

/* ---------- 底部 CTA ---------- */
.cta-band { text-align: center; }
.cta-band h2 { font-size: clamp(26px, 4vw, 36px); margin-bottom: 14px; }
.cta-band p { font-size: 17px; margin-bottom: 28px; max-width: 620px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-deep); color: rgba(255,255,255,.7); padding: 56px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; }
.footer .brand { color: #fff; margin-bottom: 14px; }
.footer p.desc { font-size: 14px; max-width: 320px; }
.footer h5 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-links a { display: block; padding: 5px 0; font-size: 14px; color: rgba(255,255,255,.7); }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 36px; padding-top: 20px; font-size: 13px; text-align: center; color: rgba(255,255,255,.5); }

/* ---------- 面包屑 / 页头 ---------- */
.page-hero { background: linear-gradient(180deg, var(--primary-soft), #fff); padding: 56px 0 44px; }
.page-hero h1 { font-size: clamp(28px, 4vw, 40px); margin-bottom: 12px; }
.page-hero p { font-size: 17px; max-width: 680px; }
.crumb { font-size: 13px; color: var(--text-3); margin-bottom: 14px; }
.crumb a:hover { color: var(--primary); }

/* ============================================================
   接入工作台 / 解决方案页组件
   ============================================================ */

/* ---------- 工作台整体布局：侧栏目录 + 正文 ---------- */
.wb-layout { display: grid; grid-template-columns: 244px 1fr; gap: 48px; align-items: start; }
.wb-layout > * { min-width: 0; }
.wb-toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 110px); overflow-y: auto; }
.wb-toc .toc-title { font-size: 12px; font-weight: 700; color: var(--text-3); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 14px; }
.wb-toc ul { display: flex; flex-direction: column; gap: 2px; border-left: 2px solid var(--border); }
.wb-toc a { display: block; padding: 9px 14px; font-size: 14px; color: var(--text-2); border-left: 2px solid transparent; margin-left: -2px; transition: all .15s ease; }
.wb-toc a:hover { color: var(--primary); background: var(--primary-soft); }
.wb-toc a.active { color: var(--primary); border-left-color: var(--primary); font-weight: 700; background: var(--primary-soft); }

/* ---------- 工作台正文区块 ---------- */
.wb-content { min-width: 0; overflow-wrap: anywhere; }
.wb-section { scroll-margin-top: 88px; margin-bottom: 64px; }
.wb-section:last-child { margin-bottom: 0; }
.wb-section > h2 { font-size: clamp(22px, 3vw, 28px); margin-bottom: 8px; display: flex; align-items: center; gap: 12px; }
.wb-section > h2 .idx { font-size: 15px; font-weight: 800; color: #fff; background: var(--primary); width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; flex: none; }
.wb-section > .sub { color: var(--text-2); font-size: 16px; margin-bottom: 26px; max-width: 760px; }
.wb-section h3 { font-size: 18px; margin: 30px 0 14px; }

/* 目标 / 价值列表 */
.goals { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.goal { display: flex; gap: 12px; background: var(--bg-soft); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 16px 18px; }
.goal .ck { color: var(--primary); font-weight: 800; flex: none; }
.goal p { font-size: 14.5px; color: var(--text-2); }

/* 价值 KPI 条 */
.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 8px; }
.kpi { background: linear-gradient(160deg, #fff, var(--primary-soft)); border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 22px; text-align: center; }
.kpi .n { font-size: 26px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.kpi .t { font-size: 13px; color: var(--text-2); margin-top: 6px; }

/* ---------- 架构图 ---------- */
.arch { display: grid; grid-template-columns: 1fr 150px 1fr; gap: 0; align-items: stretch; background: var(--bg-soft); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); padding: 20px; }
.arch-col { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.arch-col--accent { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }
.arch-head { font-weight: 800; font-size: 16px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--primary-soft); }
.arch-col--accent .arch-head { color: var(--primary); }
.arch-list { display: flex; flex-direction: column; gap: 10px; }
.arch-list li { font-size: 14px; color: var(--text-2); background: var(--bg-soft); border-radius: 10px; padding: 10px 12px; }
.arch-mid { display: flex; flex-direction: column; justify-content: center; gap: 12px; padding: 0 14px; }
.arch-line { font-size: 12.5px; font-weight: 600; color: var(--primary); text-align: center; background: var(--primary-soft); border-radius: 999px; padding: 7px 4px; position: relative; }
.arch-line::before { content: "⇄"; display: block; font-size: 14px; margin-bottom: 2px; }

/* ---------- 接口 / 数据表（复用价格表观感） ---------- */
.data-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); margin-bottom: 8px; }
.data-table th, .data-table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--border-soft); font-size: 14.5px; vertical-align: top; }
.data-table thead th { background: var(--bg-soft); color: var(--text); font-weight: 700; font-size: 14px; }
.data-table tbody tr:hover { background: var(--primary-soft); }
.data-table code { background: var(--primary-soft); color: var(--primary-dark); padding: 2px 7px; border-radius: 6px; font-size: 13px; font-family: "SF Mono", Consolas, Menlo, monospace; white-space: nowrap; }
.data-table .tag-channel { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 9px; border-radius: 999px; margin-right: 4px; }
.tag-wx { background: rgba(7,193,96,.12); color: var(--wechat); }
.tag-ali { background: rgba(22,119,255,.12); color: var(--alipay); }

/* ---------- 提示框 / 标注 ---------- */
.callout { display: flex; gap: 14px; background: linear-gradient(180deg, var(--primary-soft), #fff); border: 1px solid var(--primary-light); border-left: 4px solid var(--primary); border-radius: var(--radius); padding: 18px 20px; margin: 18px 0; }
.callout .ico { font-size: 22px; flex: none; }
.callout h4 { font-size: 15px; margin-bottom: 4px; }
.callout p { font-size: 14.5px; margin: 0; }
.callout--warn { background: linear-gradient(180deg, #FFF7E8, #fff); border-color: #FFE2B8; border-left-color: var(--warning); }
.callout--warn .ico { color: var(--warning); }
.note-list { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.note-list li { display: flex; gap: 10px; font-size: 14.5px; color: var(--text-2); }
.note-list li .dotk { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); margin-top: 9px; flex: none; }

/* ---------- 时序 / 流程时间线 ---------- */
.seq { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; counter-reset: seq; margin: 8px 0 4px; }
.seq-step { position: relative; background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 16px 14px; text-align: center; }
.seq-step .n { width: 30px; height: 30px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 800; font-size: 14px; display: grid; place-items: center; margin: 0 auto 10px; }
.seq-step .role { font-size: 12px; color: var(--text-3); font-weight: 700; letter-spacing: .04em; }
.seq-step .act { font-size: 13.5px; color: var(--text); margin-top: 4px; font-weight: 600; }
.seq-step .desc { font-size: 12px; color: var(--text-3); margin-top: 4px; }
.flowline { display: flex; align-items: center; justify-content: center; gap: 6px; color: var(--text-3); font-size: 12px; margin: 14px 0; flex-wrap: wrap; }
.flowline .badge { background: var(--bg-soft); border: 1px solid var(--border-soft); border-radius: 999px; padding: 5px 14px; font-weight: 600; color: var(--text-2); }

/* ---------- 交付验收卡片 ---------- */
.deliver-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.deliver { background: #fff; border: 1px solid var(--border-soft); border-radius: var(--radius); padding: 18px 20px; }
.deliver .code { display: inline-block; font-size: 12px; font-weight: 800; color: var(--primary); background: var(--primary-soft); border-radius: 6px; padding: 2px 8px; margin-bottom: 8px; }
.deliver h4 { font-size: 15px; margin-bottom: 6px; }
.deliver p { font-size: 13.5px; color: var(--text-2); margin: 0; }

/* ---------- 响应式（工作台组件） ---------- */
@media (max-width: 1024px) {
  .kpi-row { grid-template-columns: repeat(2, 1fr); }
  .seq { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .wb-layout { grid-template-columns: 1fr; gap: 24px; }
  .wb-toc { position: static; max-height: none; order: -1; background: var(--bg-soft); border-radius: var(--radius); padding: 14px 16px; }
  .wb-toc ul { flex-direction: row; flex-wrap: wrap; border-left: 0; gap: 8px; }
  .wb-toc a { border-left: 0; border: 1px solid var(--border); border-radius: 999px; padding: 7px 14px; font-size: 13px; }
  .wb-toc a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
  .goals,   .deliver-grid, .kpi-row { grid-template-columns: 1fr; }
  .data-table code { white-space: normal; word-break: break-all; }
  .callout code { word-break: break-all; }
  .arch { grid-template-columns: 1fr; gap: 14px; }
  .arch-mid { flex-direction: row; flex-wrap: wrap; padding: 0; }
  .arch-line { flex: 1 1 auto; }
  .arch-line::before { display: inline; margin-right: 4px; }
  .seq { grid-template-columns: 1fr; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links, .nav-cta .btn:not(.btn--primary) { display: none; }
  .nav-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero { padding: 48px 0 56px; }
  .section { padding: 56px 0; }
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .bigstats { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .section-head { margin-bottom: 40px; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-stats { gap: 20px; }
  .price-table th, .price-table td { padding: 12px 10px; font-size: 14px; }
  .btn--lg { padding: 13px 26px; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}