/* ============================================================
   AI池子 V1 · 设计系统
   意象：一口池子 —— 工具/工作流/服务都在同一个水面之下。
   克制、可信、工具站气质；不用培训机构的红价格与倒计时。
   ============================================================ */

:root {
  --ink: #0e2438;          /* 池底深蓝：标题/深色面 */
  --ink-2: #1f3a55;
  --surface: #eaf4fb;      /* 水面浅蓝：页面背景 */
  --paper: #ffffff;        /* 卡片纸白 */
  --ripple: #2f8fd6;       /* 涟漪蓝：主行动色 */
  --ripple-deep: #1f6fae;
  --teal: #0f766e;         /* 深青：免费/工作流标签 */
  --amber: #b45309;        /* 琥珀：价格点缀（少量使用） */
  --amber-bg: #fff7e6;
  --text: #23303e;
  --text-2: #5b6b7b;
  --text-3: #8a99a8;
  --line: #dbe7f0;
  --danger: #b42318;
  --radius: 18px;
  --shadow: 0 1px 2px rgba(14, 36, 56, .04), 0 6px 20px rgba(14, 36, 56, .05);
  --shadow-hover: 0 2px 4px rgba(14, 36, 56, .06), 0 14px 32px rgba(14, 36, 56, .09);
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-display: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--surface);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--ripple-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--ink); font-size: 19px; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 32px; height: 32px; flex: 0 0 32px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  color: var(--text-2); font-size: 15px; padding: 8px 12px; border-radius: 10px; font-weight: 500;
}
.nav-links a:hover { color: var(--ink); background: var(--surface); text-decoration: none; }
.nav-links a.active { color: var(--ripple-deep); background: #e5f2fb; font-weight: 600; }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--ink); color: #fff !important; padding: 9px 16px !important;
  border-radius: 999px; font-weight: 600; font-size: 14px;
}
.nav-cta:hover { background: var(--ink-2); }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line); border-radius: 10px;
  width: 42px; height: 42px; font-size: 18px; color: var(--ink); cursor: pointer;
}
.nav-toggle:focus-visible { outline: 2px solid var(--ripple); outline-offset: 2px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 20px; border-radius: 999px;
  font-size: 15px; font-weight: 600; line-height: 1.2; cursor: pointer;
  border: 1px solid transparent; text-decoration: none !important;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:focus-visible { outline: 2px solid var(--ripple); outline-offset: 2px; }
.btn-primary { background: var(--ripple); color: #fff; box-shadow: 0 6px 16px rgba(47, 143, 214, .28); }
.btn-primary:hover { background: var(--ripple-deep); transform: translateY(-1px); }
.btn-ink { background: var(--ink); color: #fff; }
.btn-ink:hover { background: var(--ink-2); transform: translateY(-1px); }
.btn-outline { background: #fff; border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--ripple); color: var(--ripple-deep); transform: translateY(-1px); }
.btn-amber { background: var(--amber-bg); border-color: #f2d9a8; color: var(--amber); }
.btn-amber:hover { background: #fdeed2; transform: translateY(-1px); }
.btn-sm { min-height: 38px; padding: 7px 14px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- 通用区块 ---------- */
.section { padding: 56px 0; }
.section-head { max-width: 640px; margin: 0 auto 32px; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em;
  color: var(--teal); text-transform: uppercase;
}
.eyebrow::before, .eyebrow::after { content: ""; width: 18px; height: 1px; background: var(--line); }
.section h2 {
  font-size: 26px; line-height: 1.3; color: var(--ink); margin: 10px 0 10px; font-weight: 700;
}
.section .sub { color: var(--text-2); font-size: 15px; margin: 0; }

/* ---------- Hero（首屏 · 池子意象） ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 500px at 50% -10%, #d8eefc 0%, transparent 60%),
    linear-gradient(180deg, #f2f9fe 0%, var(--surface) 100%);
  padding: 72px 0 64px;
  text-align: center;
}
.hero-ripple {
  position: absolute; left: 50%; top: 42%; width: 680px; height: 680px;
  transform: translate(-50%, -50%); pointer-events: none; opacity: .55;
}
.hero-ripple span {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1.5px solid rgba(47, 143, 214, .18);
  animation: ripple 8s linear infinite;
}
.hero-ripple span:nth-child(2) { animation-delay: -2.6s; }
.hero-ripple span:nth-child(3) { animation-delay: -5.2s; }
@keyframes ripple {
  0% { transform: scale(.45); opacity: .9; }
  100% { transform: scale(1.05); opacity: 0; }
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; margin: 0 auto; }
.hero h1 {
  font-size: 42px; line-height: 1.18; color: var(--ink); margin: 12px 0 8px; font-weight: 800; letter-spacing: .01em;
}
.hero h1 .serif { font-family: var(--font-display); font-weight: 700; color: var(--ripple-deep); }
.hero .lead { font-size: 18px; color: var(--text-2); margin: 12px auto 8px; max-width: 620px; }
.hero .lead-note { font-size: 15px; color: var(--text-3); max-width: 620px; margin: 0 auto; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 28px; }

/* ---------- 三入口卡片 ---------- */
.entry-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.entry-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 8px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.entry-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.entry-card .icon { font-size: 26px; }
.entry-card h3 { margin: 0; font-size: 18px; color: var(--ink); }
.entry-card p { margin: 0; color: var(--text-2); font-size: 14.5px; flex: 1; }
.entry-card .price { font-family: var(--font-mono); color: var(--amber); font-size: 15px; font-weight: 600; }
.entry-card .btn { align-self: flex-start; margin-top: 6px; }

/* ---------- 工具卡片 ---------- */
.card-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.tool-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 10px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.tool-card .tc-top { display: flex; align-items: flex-start; gap: 12px; }
.tool-card .tc-cover {
  width: 56px; height: 56px; flex: 0 0 56px; border-radius: 12px; object-fit: cover;
  border: 1px solid var(--line); background: var(--surface);
}
.tool-card h3 { margin: 0; font-size: 16.5px; color: var(--ink); line-height: 1.35; }
.tool-card .tc-desc { margin: 2px 0 0; color: var(--text-2); font-size: 13.5px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.tag {
  font-size: 12px; padding: 3px 9px; border-radius: 999px; background: var(--surface);
  color: var(--text-2); white-space: nowrap;
}
.tag.free { background: #e6f6f2; color: var(--teal); }
.tag.workflow { background: #e5f2fb; color: var(--ripple-deep); }
.tag.software { background: #f0ecfe; color: #5b4bc4; }
.tag.paid { background: var(--amber-bg); color: var(--amber); }
.tag.cps { background: #fdeee7; color: #c2410c; }
.tag.beta { background: #fff1e6; color: #ea6a12; }
.tool-card .tc-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 2px; }
.tool-card .tc-foot .date { font-family: var(--font-mono); font-size: 12px; color: var(--text-3); }

/* ---------- 场景卡片（Codex 能做什么） ---------- */
.scene-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.scene-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.scene-card h3 { margin: 0 0 10px; font-size: 17px; color: var(--ink); display: flex; align-items: center; gap: 8px; }
.scene-card ul { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; }
.scene-card li { color: var(--text-2); font-size: 14px; padding-left: 18px; position: relative; }
.scene-card li::before {
  content: ""; position: absolute; left: 2px; top: 8px; width: 7px; height: 7px; border-radius: 50%;
  background: var(--ripple); opacity: .55;
}

/* ---------- Codex 导流模块 ---------- */
.codex-cta {
  margin-top: 18px; background: linear-gradient(135deg, #e9f4fc 0%, #eef9f6 100%);
  border: 1px solid #cfe5f5; border-radius: var(--radius); padding: 22px;
  display: flex; flex-direction: column; gap: 10px; align-items: flex-start;
}
.codex-cta h4 { margin: 0; font-size: 17px; color: var(--ink); }
.codex-cta p { margin: 0; color: var(--text-2); font-size: 14.5px; }

/* ---------- 需求表单 ---------- */
.req-form {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); max-width: 720px; margin: 0 auto;
}
.form-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.field label .req { color: var(--danger); margin-left: 2px; }
.field input, .field textarea, .field select {
  width: 100%; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px;
  font-size: 15px; font-family: var(--font-body); color: var(--text); background: #fbfdff;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: 2px solid var(--ripple); outline-offset: -1px; border-color: transparent;
}
.radio-row { display: flex; flex-wrap: wrap; gap: 10px; }
.radio-pill {
  border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; font-size: 14px;
  color: var(--text-2); background: #fff; cursor: pointer; user-select: none;
}
.radio-pill input { display: none; }
.radio-pill:has(input:checked) { background: #e5f2fb; border-color: var(--ripple); color: var(--ripple-deep); font-weight: 600; }
.form-note { color: var(--text-3); font-size: 13px; margin-top: 12px; }
.req-success {
  text-align: center; padding: 40px 20px; background: var(--paper);
  border: 1px solid #cfe5f5; border-radius: var(--radius); box-shadow: var(--shadow);
}
.req-success .ok { font-size: 40px; }
.req-success h3 { color: var(--ink); margin: 10px 0 6px; }
.req-success p { color: var(--text-2); max-width: 460px; margin: 0 auto; }

/* ---------- Codex 页定价卡 ---------- */
.offer-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.offer-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 10px;
}
.offer-card.hot { border-color: #b9ddf5; box-shadow: 0 0 0 3px rgba(47, 143, 214, .08), var(--shadow); }
.offer-card h3 { margin: 0; font-size: 18px; color: var(--ink); }
.offer-card .price-line { display: flex; align-items: baseline; gap: 8px; }
.offer-card .price { font-size: 30px; font-weight: 800; color: var(--amber); font-family: var(--font-mono); }
.offer-card .price-note { color: var(--text-3); font-size: 13px; }
.offer-card ul { margin: 0; padding-left: 18px; color: var(--text-2); font-size: 14px; display: flex; flex-direction: column; gap: 5px; }
.offer-card .boundary { background: #fdf3f2; border: 1px dashed #f0c9c5; color: #8a4b44; border-radius: 12px; padding: 10px 12px; font-size: 13px; }
.offer-card .boundary strong { display: block; margin-bottom: 4px; }

/* ---------- 关于 / 页脚 ---------- */
.about-block { max-width: 720px; margin: 0 auto; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.about-block h3 { color: var(--ink); margin: 0 0 12px; }
.about-block ul { margin: 0; padding-left: 18px; color: var(--text-2); display: flex; flex-direction: column; gap: 6px; }
.site-footer { background: var(--ink); color: #b8c9d8; padding: 36px 0 28px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.site-footer h4 { color: #fff; margin: 0 0 10px; font-size: 15px; }
.site-footer a { color: #9fc3dd; }
.site-footer p { margin: 4px 0; font-size: 13.5px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 24px; padding-top: 16px; font-size: 12.5px; color: #7f96a8; text-align: center; }

/* ---------- 二维码弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; z-index: 100; background: rgba(10, 22, 34, .55);
  display: none; align-items: center; justify-content: center; padding: 20px;
}
.modal-mask.open { display: flex; }
.modal {
  background: #fff; border-radius: 20px; padding: 26px 24px; max-width: 400px; width: 100%;
  text-align: center; box-shadow: 0 24px 64px rgba(10, 22, 34, .3);
}
.modal h3 { margin: 0 0 6px; color: var(--ink); font-size: 19px; }
.modal p { color: var(--text-2); font-size: 14px; margin: 4px 0 14px; }
.modal img.qr { width: 200px; height: 200px; margin: 0 auto; border-radius: 12px; border: 1px solid var(--line); }
.modal .modal-close {
  margin-top: 14px; background: var(--surface); border: none; border-radius: 999px;
  padding: 9px 22px; font-size: 14px; color: var(--ink); cursor: pointer;
}

/* ---------- 列表页工具栏 ---------- */
.toolbar { display: flex; flex-direction: column; gap: 12px; margin-bottom: 22px; }
.search-box {
  position: relative; max-width: 480px; width: 100%;
}
.search-box input {
  width: 100%; border: 1px solid var(--line); border-radius: 999px; padding: 12px 18px 12px 42px;
  font-size: 15px; background: var(--paper); color: var(--text);
}
.search-box .mag { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--text-3); }
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-pill {
  border: 1px solid var(--line); background: var(--paper); border-radius: 999px;
  padding: 7px 14px; font-size: 13.5px; color: var(--text-2); cursor: pointer; user-select: none;
}
.filter-pill.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.pager { display: flex; justify-content: center; align-items: center; gap: 12px; margin-top: 24px; }
.page-info { font-size: 13.5px; color: var(--text-2); }

/* ---------- 详情页 ---------- */
.detail { max-width: 760px; margin: 0 auto; }
.detail-head { margin-bottom: 20px; }
.detail-head .crumb { font-size: 13px; color: var(--text-3); margin-bottom: 10px; }
.detail-head h1 { font-size: 26px; line-height: 1.35; color: var(--ink); margin: 0 0 10px; }
.detail-head .meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.detail-cover { border-radius: var(--radius); border: 1px solid var(--line); margin: 0 0 18px; background: var(--paper); }
.detail-body { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.detail-body p { color: var(--text); font-size: 15px; }
.detail-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.detail-note { margin-top: 14px; font-size: 13px; color: var(--text-3); }
.related-title { font-size: 17px; color: var(--ink); margin: 28px 0 12px; }

/* ---------- 浏览器本地小工具页 ---------- */
.tool-app { max-width: 760px; margin: 0 auto; }
.tool-app .op-panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.tool-app textarea {
  width: 100%; min-height: 200px; border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 14px; font-size: 14px; font-family: var(--font-mono); color: var(--text);
  background: #fbfdff; resize: vertical; line-height: 1.6;
}
.tool-app textarea:focus { outline: 2px solid var(--ripple); outline-offset: -1px; border-color: transparent; }
.tool-app .op-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.tool-app .op-result { margin-top: 14px; }
.tool-app .op-result textarea { min-height: 150px; }
.tool-app .opts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.tool-app .opt { display: inline-flex; align-items: center; gap: 6px; font-size: 13.5px; color: var(--text-2); cursor: pointer; }
.tool-app .stats { font-size: 12.5px; color: var(--text-3); margin-top: 8px; }
.tool-app .info-block { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; margin-top: 14px; box-shadow: var(--shadow); }
.tool-app .info-block h3 { margin: 0 0 6px; font-size: 15px; color: var(--ink); }
.tool-app .info-block ul { margin: 0; padding-left: 18px; color: var(--text-2); font-size: 13.5px; display: flex; flex-direction: column; gap: 4px; }
.tool-app .privacy-note { margin-top: 10px; padding: 10px 12px; background: #eef9f6; border: 1px solid #cfe9e1; border-radius: 10px; font-size: 12.5px; color: var(--teal); }

/* ---------- 移动端 ---------- */
@media (min-width: 560px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 860px) {
  .entry-grid { grid-template-columns: repeat(3, 1fr); }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .offer-grid { grid-template-columns: repeat(auto-fit, minmax(320px, 480px)); justify-content: center; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-grid .span2 { grid-column: 1 / -1; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .section { padding: 72px 0; }
  .hero { padding: 96px 0 84px; }
  .hero h1 { font-size: 52px; }
}
@media (max-width: 859px) {
  .nav-links {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px 16px;
    flex-direction: column; align-items: stretch; gap: 4px; box-shadow: 0 16px 32px rgba(10,22,34,.08);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 12px; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}