/* ============================================================
   牛马工具箱 · 门面站 v3
   对照 IRONFRAME EYEWEAR 模板截图重建：
   导航左 / 品牌居中 / 按钮右 · 全幅 hero · 双图卡 ·
   三定价卡 · 大宣言+四图标 · 全幅 CTA · 深色页脚
   气质：轻、透、克制；黄只做点缀
   ============================================================ */
:root {
  --paper: #ffffff;
  --cream: #faf9f6;
  --ink: #1b1b1b;
  --ink-soft: #3d3d3d;
  --gray: #71716c;
  --gray-light: #a9a8a2;
  --line: #e9e6de;
  --yellow: #ffc531;
  --yellow-deep: #eda400;
  --yellow-soft: #fff4d9;
  --dark: #111111;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --maxw: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  font-size: 16px; line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 16px 46px;
  font-size: 15px; font-weight: 600; letter-spacing: .06em;
  border-radius: 999px; border: 1px solid transparent; cursor: pointer;
  transition: background .2s, transform .2s, box-shadow .2s;
  white-space: nowrap; font-family: var(--font);
}
.btn-yellow { background: var(--yellow); color: var(--ink); }
.btn-yellow:hover { background: var(--yellow-deep); transform: translateY(-2px); box-shadow: 0 12px 26px rgba(237,164,0,.3); }
.btn-white { background: #fff; color: var(--ink); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(0,0,0,.25); }
.btn-outline-w { background: transparent; color: #fff; border-color: rgba(255,255,255,.85); }
.btn-outline-w:hover { background: #fff; color: var(--ink); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-ghost-light { background: transparent; color: #f5f3ee; border-color: rgba(245,243,238,.4); }
.btn-ghost-light:hover { border-color: #f5f3ee; }
.btn-dark { background: var(--ink); color: #fff; border-color: var(--ink); }
.btn-dark:hover { background: #000; border-color: #000; }

/* ---------- 页眉：导航左 / 品牌中 / 按钮右 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent; transition: border-color .25s;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.header-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 32px; height: 76px;
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
}
.main-nav { display: flex; gap: 30px; }
.main-nav a { font-size: 14.5px; color: var(--ink-soft); letter-spacing: .04em; padding: 4px 0; border-bottom: 2px solid transparent; }
.main-nav a:hover { border-bottom-color: var(--yellow); }
.brand { display: flex; align-items: center; gap: 10px; justify-self: center; }
.brand img { height: 36px; width: auto; }
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: .14em; }
.brand-en { font-style: normal; font-size: 11px; font-weight: 500; letter-spacing: .3em; color: var(--gray-light); margin-left: 10px; }
.header-cta { justify-self: end; }
.header-cta .btn { padding: 11px 28px; font-size: 13.5px; }
.menu-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; justify-self: start; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; }
.mobile-nav { display: none; }

/* ---------- Hero：深墨纯色 ---------- */
.hero {
  min-height: 94vh; display: flex; align-items: center; justify-content: center; text-align: center;
  background: var(--ink);
  position: relative; color: #f5f3ee; padding: 130px 24px 80px;
}
.hero-inner { position: relative; max-width: 860px; }
.hero-eyebrow { font-size: 15px; letter-spacing: .22em; color: var(--gray-light); margin-bottom: 26px; }
.hero h1 { font-size: clamp(32px, 4.6vw, 58px); font-weight: 600; letter-spacing: .06em; line-height: 1.6; margin-bottom: 24px; color: #fff; }
.hero h1 .hl { color: var(--yellow); }
.hero-sub { font-size: 16.5px; color: #c9c7c0; margin-bottom: 46px; letter-spacing: .04em; white-space: nowrap; }
.hero-note { margin-top: 26px; font-size: 12.5px; letter-spacing: .14em; color: var(--gray-light); }
.hero-note i { font-style: normal; margin: 0 10px; }

/* ---------- 数字条 ---------- */
.stats { border-bottom: 1px solid var(--line); }
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); max-width: var(--maxw); margin: 0 auto; }
.stat { padding: 40px 20px; text-align: center; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; }
.stat b { display: block; font-size: 40px; font-weight: 600; letter-spacing: .02em; }
.stat b em { font-style: normal; color: var(--yellow-deep); font-size: 30px; }
.stat span { font-size: 13px; color: var(--gray); letter-spacing: .22em; }

/* ---------- 通用区块 ---------- */
.sec { padding: 104px 0; }
.sec-title { font-size: clamp(26px, 3.2vw, 38px); font-weight: 600; letter-spacing: .05em; text-align: center; margin-bottom: 18px; }
.sec-sub { text-align: center; color: var(--gray); max-width: 620px; margin: 0 auto 64px; font-size: 15.5px; }


/* ---------- 定价三卡（Essential frames） ---------- */
.pricing { background: var(--cream); }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; align-items: stretch; }
.price-card {
  background: #fff; border: 1px solid var(--line); border-radius: 4px;
  padding: 46px 40px; display: flex; flex-direction: column; position: relative;
  transition: transform .25s, box-shadow .25s;
}
.price-card:hover { transform: translateY(-5px); box-shadow: 0 22px 44px rgba(20,20,20,.08); }
.price-card.hot { border: 1px solid var(--yellow-deep); box-shadow: 0 18px 40px rgba(237,164,0,.12); }
.price-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--yellow); color: var(--ink); font-size: 12px; font-weight: 700;
  letter-spacing: .18em; padding: 6px 22px; border-radius: 20px; white-space: nowrap;
}
.price-name { font-size: 13px; letter-spacing: .3em; color: var(--gray); margin-bottom: 16px; }
.price-num { font-size: 50px; font-weight: 600; letter-spacing: 0; margin-bottom: 6px; }
.price-num small { font-size: 15px; font-weight: 400; color: var(--gray); }
.price-desc { font-size: 14px; color: var(--gray); margin-bottom: 30px; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.price-feats { margin-bottom: 38px; flex-grow: 1; }
.price-feats li { font-size: 14.5px; color: var(--ink-soft); padding: 8px 0 8px 26px; position: relative; }
.price-feats li::before { content: "—"; position: absolute; left: 0; color: var(--yellow-deep); }
.price-card .btn { width: 100%; text-align: center; }
.price-note { text-align: center; margin-top: 40px; font-size: 13px; color: var(--gray-light); letter-spacing: .06em; }
.price-motto { text-align: center; font-size: 19px; letter-spacing: .14em; margin-bottom: 54px; color: var(--ink-soft); }
.price-motto b { color: var(--yellow-deep); font-weight: 700; }

/* ---------- 宣言 + 四图标 ---------- */
.manifesto h2 { font-size: clamp(28px, 3.8vw, 44px); font-weight: 500; letter-spacing: .04em; line-height: 1.6; text-align: center; max-width: 860px; margin: 0 auto 22px; }
.manifesto h2 .hl { color: var(--yellow-deep); }
.manifesto > .wrap > p { text-align: center; color: var(--gray); max-width: 640px; margin: 0 auto 72px; }
.icon-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.icon-item { text-align: left; }
.icon-item .ic { width: 46px; height: 46px; margin-bottom: 20px; }
.icon-item .ic svg { width: 100%; height: 100%; stroke: var(--ink); fill: none; stroke-width: 1.4; }
.icon-item .en-tag { display: block; font-size: 10px; font-weight: 600; letter-spacing: .32em; color: var(--yellow-deep); margin-bottom: 10px; }
.icon-item h3 { font-size: 16.5px; font-weight: 600; letter-spacing: .06em; margin-bottom: 10px; }
.icon-item p { font-size: 13.5px; color: var(--gray); line-height: 1.8; }

/* ---------- 老板人格 ---------- */
.persona { background: var(--dark); color: #ecebe6; }
.persona-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.persona .kicker { font-size: 12px; letter-spacing: .3em; color: var(--yellow); margin-bottom: 18px; display: block; }
.persona h2 { font-size: clamp(28px, 3.4vw, 40px); font-weight: 600; letter-spacing: .05em; color: #fff; margin-bottom: 20px; line-height: 1.55; }
.persona .lead { color: #a9a8a2; font-size: 15.5px; margin-bottom: 34px; }
.persona-points li { padding: 14px 0; border-bottom: 1px solid #2b2b2b; font-size: 14.5px; color: #cfceC9; display: flex; gap: 16px; }
.persona-points li:last-child { border-bottom: 0; }
.persona-points li b { color: var(--yellow); font-weight: 600; }
.persona .btn { margin-top: 36px; }
.chat-mock { background: #1c1c1c; border: 1px solid #2e2e2e; border-radius: 6px; padding: 32px 30px; }
.chat-line { margin-bottom: 20px; font-size: 14px; }
.chat-line .who { display: block; font-size: 11px; letter-spacing: .24em; color: #7d7c77; margin-bottom: 8px; }
.chat-line.ai .who { color: var(--yellow); }
.chat-line .bubble { display: inline-block; background: #262626; padding: 13px 20px; border-radius: 3px 16px 16px 16px; color: #e6e5e0; max-width: 94%; line-height: 1.75; }
.chat-line.me { text-align: right; }
.chat-line.me .bubble { background: #2e2b24; border-radius: 16px 3px 16px 16px; text-align: left; }
.chat-profile { margin-top: 6px; border: 1px dashed rgba(255,197,49,.55); border-radius: 4px; padding: 16px 20px; font-size: 13px; color: var(--yellow); letter-spacing: .04em; background: rgba(255,197,49,.06); }

/* ---------- 全幅 CTA：品牌黄纯色 ---------- */
.final-cta {
  min-height: 68vh; display: flex; align-items: center; justify-content: center; text-align: center;
  background: var(--yellow); position: relative; color: var(--ink); padding: 100px 24px;
}
.final-cta .wrap { position: relative; }
.final-cta .kicker { font-size: 12px; letter-spacing: .34em; color: rgba(27,27,27,.62); margin-bottom: 22px; display: block; }
.final-cta h2 { font-size: clamp(34px, 5vw, 60px); font-weight: 600; letter-spacing: .08em; margin-bottom: 20px; }
.final-cta p { color: var(--ink-soft); margin-bottom: 44px; letter-spacing: .06em; }
.final-cta .cta-en { font-size: 12.5px; letter-spacing: .42em; color: rgba(27,27,27,.62); margin: -8px 0 38px; }
.final-cta .micro { margin-top: 28px; font-size: 12px; letter-spacing: .2em; color: rgba(27,27,27,.6); }
.final-cta .micro i { font-style: normal; margin: 0 12px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item:first-child { border-top: 1px solid var(--line); }
.faq-q {
  width: 100%; background: none; border: 0; cursor: pointer; font-family: var(--font);
  display: flex; justify-content: space-between; align-items: center; gap: 24px;
  padding: 26px 4px; font-size: 16.5px; font-weight: 600; color: var(--ink); text-align: left; letter-spacing: .03em;
}
.faq-q .plus { font-size: 22px; font-weight: 300; color: var(--yellow-deep); transition: transform .3s; flex-shrink: 0; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a p { padding: 0 4px 30px; color: var(--gray); font-size: 15px; max-width: 680px; }
.faq-a p strong { color: var(--ink); }

/* ---------- 页脚（深色） ---------- */
.site-footer { background: var(--dark); color: #b9b8b2; padding: 76px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 60px; }
.footer-brand img { height: 40px; margin-bottom: 20px; filter: invert(1); }
.footer-brand p { font-size: 13.5px; max-width: 300px; line-height: 1.9; }
.footer-col h4 { font-size: 12px; letter-spacing: .28em; color: #7d7c77; margin-bottom: 22px; font-weight: 600; }
.footer-col li { margin-bottom: 13px; }
.footer-col a { font-size: 14px; color: #b9b8b2; }
.footer-col a:hover { color: var(--yellow); }
.footer-bottom { border-top: 1px solid #2b2b2b; padding: 26px 0; display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: #7d7c77; }
.footer-bottom .trust { display: flex; gap: 22px; }
.footer-bottom .trust span::before { content: "· "; color: var(--yellow-deep); }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .12s; } .reveal.d2 { transition-delay: .24s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .persona-grid { grid-template-columns: 1fr; gap: 40px; }
  .price-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .icon-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-sub { white-space: normal; }
}
@media (max-width: 760px) {
  .wrap { padding: 0 20px; }
  .header-inner { padding: 0 20px; grid-template-columns: auto 1fr auto; }
  .main-nav { display: none; }
  .menu-toggle { display: block; }
  .brand { justify-self: center; }
  .mobile-nav { display: none; position: fixed; top: 76px; left: 0; right: 0; z-index: 99; background: #fff; border-bottom: 1px solid var(--line); padding: 8px 20px 18px; }
  .site-header.nav-open .mobile-nav { display: block; }
  .mobile-nav a { display: block; padding: 14px 4px; font-size: 15.5px; border-bottom: 1px solid var(--line); }
  .mobile-nav a:last-child { border-bottom: 0; }
  .sec { padding: 72px 0; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .stat { padding: 28px 12px; }
  .stat:nth-child(3) { border-left: 0; }
  .stat b { font-size: 30px; }
  .icon-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero { min-height: 88vh; }
}

/* 上标 */
sup{font-size:.62em;letter-spacing:0}