:root {
  --bg: #f7f8fb;
  --card: #ffffff;
  --ink: #1c2333;
  --ink2: #5a6478;
  --line: #e6e9f0;
  --brand: #3554e6;
  --brand-soft: #eef2ff;
  --gold: #c98a1b;
  --gold-soft: #fdf6e7;
  --green: #0e9f6e;
  --red: #e0245e;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; gap: 32px;
}
.logo { font-size: 20px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.logo .mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, #3554e6, #7b5ce0);
  color: #fff; font-size: 15px; display: flex; align-items: center; justify-content: center;
}
.logo .sub { font-size: 11px; font-weight: 500; color: var(--ink2); margin-left: 2px; }
.nav-links { display: flex; gap: 26px; font-size: 14.5px; color: var(--ink2); flex: 1; }
.nav-links a:hover { color: var(--brand); }
.nav-links a.active { color: var(--brand); font-weight: 600; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; border-radius: 10px; font-size: 14.5px; font-weight: 600;
  border: none; cursor: pointer; transition: all .15s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: #2a43c4; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

/* ===== Hero ===== */
.hero { padding: 84px 0 60px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -20% auto;
  height: 520px;
  background: radial-gradient(ellipse at center, rgba(53,84,230,.10), transparent 65%);
  pointer-events: none;
}
.hero h1 { font-size: 44px; font-weight: 800; letter-spacing: -1px; line-height: 1.25; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero p.lead { font-size: 18px; color: var(--ink2); margin: 18px auto 0; max-width: 620px; }
.hero-cta { margin-top: 32px; display: flex; gap: 14px; justify-content: center; }
.hero-cta .btn { padding: 13px 30px; font-size: 16px; border-radius: 12px; }
.hero-note { margin-top: 14px; font-size: 13px; color: var(--ink2); }
.platform-row {
  margin-top: 44px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
}
.platform-row span {
  padding: 7px 16px; border-radius: 999px; background: var(--card);
  border: 1px solid var(--line); font-size: 13px; color: var(--ink2);
}

/* ===== 数据条 ===== */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 56px 0 0; }
.stat {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 24px; text-align: center;
}
.stat b { font-size: 32px; font-weight: 800; color: var(--brand); display: block; }
.stat span { font-size: 13.5px; color: var(--ink2); }

/* ===== 区块 ===== */
.section { padding: 72px 0; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head .kicker {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 2px;
  color: var(--brand); background: var(--brand-soft); padding: 5px 14px; border-radius: 999px;
  margin-bottom: 14px;
}
.section-head h2 { font-size: 30px; font-weight: 800; letter-spacing: -.5px; }
.section-head p { color: var(--ink2); margin-top: 10px; font-size: 15.5px; }

/* ===== 优势卡 ===== */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.adv {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 26px;
  transition: transform .15s, box-shadow .15s;
}
.adv:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(28,35,51,.07); }
.adv .num { font-size: 13px; font-weight: 800; color: var(--brand); }
.adv h3 { font-size: 17px; margin: 10px 0 8px; }
.adv p { font-size: 13.5px; color: var(--ink2); }

/* ===== 分类 ===== */
.cat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.cat {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 22px 18px; text-align: center; transition: all .15s; display: block;
}
.cat:hover { border-color: var(--brand); transform: translateY(-3px); }
.cat .icon { font-size: 30px; }
.cat h3 { font-size: 16px; margin: 10px 0 4px; }
.cat p { font-size: 12.5px; color: var(--ink2); }

/* ===== 场景 ===== */
.scene-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.scene {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
}
.scene-head { padding: 20px 24px 14px; display: flex; align-items: center; justify-content: space-between; }
.scene-head h3 { font-size: 16.5px; }
.scene-head .tag { font-size: 12px; color: var(--brand); background: var(--brand-soft); padding: 3px 10px; border-radius: 999px; }
.scene-body { padding: 0 24px 22px; font-size: 13.5px; color: var(--ink2); }
.chat { background: #f2f4f9; border-radius: 12px; padding: 14px 16px; margin-top: 10px; font-size: 13.5px; }
.chat .user { color: var(--ink); font-weight: 600; }
.chat .ai { margin-top: 8px; color: var(--ink2); }
.scene-metrics { display: flex; gap: 18px; margin-top: 14px; }
.scene-metrics b { color: var(--brand); font-size: 15px; }
.scene-metrics small { display: block; color: var(--ink2); font-size: 12px; }

/* ===== 工具广场 ===== */
.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 24px; }
.search-box {
  flex: 1; min-width: 260px; display: flex; align-items: center; gap: 8px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 16px;
}
.search-box input { border: none; outline: none; flex: 1; font-size: 14.5px; background: transparent; color: var(--ink); }
.filter-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 7px 16px; border-radius: 999px; font-size: 13.5px; cursor: pointer;
  background: var(--card); border: 1px solid var(--line); color: var(--ink2); border: 1px solid var(--line);
}
.chip.on { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.tool-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px;
  display: flex; flex-direction: column; gap: 8px; transition: all .15s;
}
.tool-card:hover { border-color: var(--brand); box-shadow: 0 8px 24px rgba(28,35,51,.07); }
.tool-top { display: flex; align-items: center; justify-content: space-between; }
.tool-top .name { font-weight: 700; font-size: 15.5px; }
.tool-credit {
  font-size: 12.5px; font-weight: 700; color: var(--gold);
  background: var(--gold-soft); padding: 3px 10px; border-radius: 999px; white-space: nowrap;
}
.tool-card .en { font-size: 12px; color: #9aa3b5; font-family: Consolas, monospace; }
.tool-card p { font-size: 13px; color: var(--ink2); flex: 1; }
.tool-bottom { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: #9aa3b5; }
.empty-tip { text-align: center; color: var(--ink2); padding: 60px 0; grid-column: 1/-1; }

/* ===== 详情页 ===== */
.detail-wrap { display: grid; grid-template-columns: 1fr 340px; gap: 24px; align-items: start; }
.detail-main { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 32px; }
.detail-main h1 { font-size: 26px; }
.detail-main .en { font-family: Consolas, monospace; color: #9aa3b5; font-size: 13.5px; }
.detail-main .desc { margin-top: 14px; color: var(--ink2); }
.detail-sec { margin-top: 30px; }
.detail-sec h3 { font-size: 16px; margin-bottom: 12px; padding-left: 10px; border-left: 3px solid var(--brand); }
pre.code {
  background: #10162b; color: #dbe4ff; border-radius: 12px; padding: 18px 20px;
  font-size: 13px; font-family: Consolas, "Courier New", monospace; overflow-x: auto; line-height: 1.65;
}
.detail-side { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 16px; }
.side-card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.side-card h4 { font-size: 14px; color: var(--ink2); margin-bottom: 10px; }
.side-row { display: flex; justify-content: space-between; font-size: 14px; padding: 6px 0; }
.side-row b { font-weight: 700; }

/* ===== 价格表 ===== */
.price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.price-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 30px 26px;
  position: relative; display: flex; flex-direction: column;
}
.price-card.hot { border: 2px solid var(--brand); }
.price-card .hot-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--brand); color: #fff; font-size: 12px; font-weight: 700;
  padding: 3px 14px; border-radius: 999px;
}
.price-card h3 { font-size: 16px; color: var(--ink2); }
.price-card .amount { font-size: 36px; font-weight: 800; margin: 10px 0 2px; }
.price-card .amount small { font-size: 14px; font-weight: 500; color: var(--ink2); }
.price-card .credits { font-size: 14px; color: var(--gold); font-weight: 700; margin-bottom: 16px; }
.price-card ul { list-style: none; font-size: 13.5px; color: var(--ink2); flex: 1; }
.price-card li { padding: 5px 0; padding-left: 22px; position: relative; }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 700; }
.price-card .btn { margin-top: 20px; justify-content: center; }

/* ===== FAQ ===== */
.faq { max-width: 760px; margin: 0 auto; }
.faq-item { background: var(--card); border: 1px solid var(--line); border-radius: 14px; margin-bottom: 12px; overflow: hidden; }
.faq-item summary { padding: 18px 22px; font-weight: 600; cursor: pointer; font-size: 15px; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--brand); font-weight: 800; }
.faq-item[open] summary::after { content: "−"; }
.faq-item .ans { padding: 0 22px 18px; font-size: 14px; color: var(--ink2); }

/* ===== 对比表 ===== */
.cmp { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 16px; overflow: hidden; border: 1px solid var(--line); }
.cmp th, .cmp td { padding: 14px 18px; border-bottom: 1px solid var(--line); font-size: 14px; text-align: left; }
.cmp th { background: var(--brand-soft); font-size: 13.5px; }
.cmp td:first-child { font-weight: 700; width: 120px; }
.cmp .us { color: var(--brand); font-weight: 700; }
.cmp tr:last-child td { border-bottom: none; }

/* ===== 充值流程 ===== */
.flow { display: flex; gap: 0; align-items: stretch; justify-content: center; flex-wrap: wrap; }
.flow-step { text-align: center; padding: 0 18px; position: relative; flex: 1; min-width: 150px; }
.flow-step .ic { font-size: 30px; }
.flow-step h4 { font-size: 14.5px; margin: 8px 0 4px; }
.flow-step p { font-size: 12.5px; color: var(--ink2); }
.flow-step:not(:last-child)::after {
  content: "→"; position: absolute; right: -8px; top: 6px; font-size: 20px; color: #c3cad9;
}
.notice {
  background: var(--gold-soft); border: 1px solid #f0e2c0; border-radius: 12px;
  padding: 14px 18px; font-size: 13.5px; color: #8a6a1f; margin-top: 20px;
}

/* ===== 步骤 ===== */
.step-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.step .no {
  width: 34px; height: 34px; border-radius: 10px; background: var(--brand-soft);
  color: var(--brand); font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.step h3 { font-size: 16.5px; margin: 14px 0 8px; }
.step p { font-size: 13.5px; color: var(--ink2); }

/* ===== CTA 条 ===== */
.cta-band {
  background: linear-gradient(135deg, #1c2a5e, #3554e6);
  border-radius: 20px; padding: 52px 40px; text-align: center; color: #fff;
}
.cta-band h2 { font-size: 26px; }
.cta-band p { opacity: .85; margin-top: 8px; font-size: 15px; }
.cta-band .btn { margin-top: 24px; background: #fff; color: var(--brand); font-size: 16px; padding: 13px 32px; }

/* ===== 页脚 ===== */
footer { border-top: 1px solid var(--line); margin-top: 72px; padding: 44px 0 32px; background: var(--card); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.foot-grid h4 { font-size: 14px; margin-bottom: 12px; }
.foot-grid a { display: block; font-size: 13.5px; color: var(--ink2); padding: 4px 0; }
.foot-grid a:hover { color: var(--brand); }
.foot-brand p { font-size: 13px; color: var(--ink2); margin-top: 10px; max-width: 280px; }
.copyright { text-align: center; font-size: 12.5px; color: #9aa3b5; margin-top: 36px; }

/* ===== 全站接入区（每页可见） ===== */
.connect-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 18px;
  padding: 24px 26px; box-shadow: 0 10px 34px rgba(28, 42, 94, .06);
  border-top: 3px solid var(--brand);
}
.connect-head {
  display: flex; align-items: center; gap: 10px; font-size: 13.5px; font-weight: 700;
  color: var(--ink2); margin-bottom: 14px; flex-wrap: wrap;
}
.connect-head .dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--green);
  box-shadow: 0 0 0 4px rgba(34, 178, 110, .15);
}
.connect-state { margin-left: auto; font-size: 12.5px; font-weight: 600; }
.connect-card pre.code { max-height: 260px; }
.connect-tip { font-size: 13px; color: var(--ink2); margin-top: 14px; line-height: 1.7; }
.connect-card .chip { cursor: pointer; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 32px; }
  .stats, .adv-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-wrap { grid-template-columns: 1fr; }
  .scene-grid, .step-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .stats, .adv-grid, .price-grid, .tool-grid { grid-template-columns: 1fr; }
}