/* ============================================================
   Ezcli 官网样式 — 纯 CSS、零依赖、离线可用
   浅色为主，深色 hero 窗口示意 + 深色页脚做对比
   ============================================================ */

:root {
  /* 颜色 */
  --bg: #f7f8fa;
  --bg-alt: #eef1f5;
  --surface: #ffffff;
  --text: #101828;
  --text-soft: #475467;
  --muted: #98a2b3;
  --border: #e4e7ec;
  --brand: #4f46e5;
  --brand-strong: #4338ca;
  --brand-soft: #eef0fe;
  --ok: #12b76a;
  --warn: #f79009;
  --danger: #f04438;

  /* 深色（hero 窗口示意 / CTA / 页脚） */
  --dark-1: #0d1021;
  --dark-2: #141830;
  --dark-3: #1c2140;
  --dark-line: #2a3054;
  --dark-text: #e6e9f5;
  --dark-muted: #8d94b8;

  /* 几何 */
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-soft: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .07);
  --shadow-lift: 0 2px 4px rgba(16, 24, 40, .06), 0 16px 40px rgba(16, 24, 40, .13);

  /* 字体 */
  --font: "Segoe UI", "Microsoft YaHei", system-ui, -apple-system, "PingFang SC", sans-serif;
  --mono: Consolas, "Cascadia Mono", "Courier New", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { display: block; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--mono);
  font-size: .85em;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  color: var(--text-soft);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ============================================================
   通用按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-radius: 999px;
  padding: 11px 26px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.3;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(79, 70, 229, .32);
}
.btn-primary:hover { background: var(--brand-strong); color: #fff; }

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  box-shadow: var(--shadow-soft);
}
.btn-ghost:hover { border-color: #c8cdd8; color: var(--text); }

.btn-invert { background: #fff; color: var(--dark-1); }
.btn-invert:hover { background: #e9ebff; color: var(--dark-1); }

.btn-outline-invert {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .42);
}
.btn-outline-invert:hover { border-color: #fff; color: #fff; background: rgba(255, 255, 255, .08); }

.btn-lg { padding: 14px 32px; font-size: 16.5px; }
.btn-pill { padding: 8px 20px; font-size: 14.5px; }

.btn-disabled {
  background: var(--bg-alt);
  color: var(--muted);
  border: 1px dashed #c9cfda;
  cursor: not-allowed;
  box-shadow: none;
}
.btn-disabled:hover { transform: none; }

.btn-note {
  font-size: 12px;
  font-weight: 500;
  opacity: .82;
  border-left: 1px solid rgba(255, 255, 255, .35);
  padding-left: 10px;
}

/* ============================================================
   顶栏（sticky 半透明）
   ============================================================ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 66px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 19px;
  color: var(--text);
  letter-spacing: .2px;
}
.brand:hover { text-decoration: none; }
.brand-logo { border-radius: 7px; }

.topnav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.topnav a {
  color: var(--text-soft);
  font-size: 14.5px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
}
.topnav a:hover { color: var(--text); background: var(--bg-alt); text-decoration: none; }
.topnav-ext { color: var(--brand) !important; }

.topbar-cta { flex-shrink: 0; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(79, 70, 229, .10), transparent 65%),
    radial-gradient(700px 380px at -10% 30%, rgba(18, 183, 106, .07), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  align-items: center;
  gap: 56px;
  padding-top: 84px;
  padding-bottom: 92px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .8px;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid #dfe3fd;
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 46px;
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -.5px;
}

.hero-slogan {
  margin-top: 14px;
  font-size: 21px;
  font-weight: 700;
  color: var(--brand);
  font-family: var(--mono);
  letter-spacing: .3px;
}

.hero-desc {
  margin-top: 18px;
  font-size: 16px;
  color: var(--text-soft);
  max-width: 52ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 26px;
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- 纯 CSS 应用窗口示意 ---------- */
.hero-visual { position: relative; }

.mock-window {
  background: var(--dark-2);
  border: 1px solid var(--dark-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lift), 0 30px 80px rgba(13, 16, 33, .35);
  overflow: hidden;
}

.mock-titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  background: var(--dark-1);
  border-bottom: 1px solid var(--dark-line);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }
.mock-title {
  margin-left: 10px;
  font-size: 12.5px;
  color: var(--dark-muted);
  font-family: var(--mono);
}

.mock-body {
  display: grid;
  grid-template-columns: 176px minmax(0, 1fr);
  min-height: 330px;
}

/* 左侧会话列表 */
.mock-side {
  background: var(--dark-1);
  border-right: 1px solid var(--dark-line);
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
}
.mock-side-head {
  color: #fff;
  background: var(--brand);
  text-align: center;
  border-radius: 8px;
  padding: 6px 0;
  font-weight: 600;
  margin-bottom: 8px;
}
.mock-group {
  margin: 8px 6px 4px;
  font-size: 10.5px;
  color: var(--dark-muted);
  letter-spacing: .5px;
}
.mock-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 8px;
  color: var(--dark-text);
  white-space: nowrap;
  overflow: hidden;
}
.mock-item.active { background: var(--dark-3); }
.run-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(18, 183, 106, .22);
  flex-shrink: 0;
}
.tag {
  margin-left: auto;
  font-size: 9.5px;
  font-family: var(--mono);
  padding: 1px 6px;
  border-radius: 999px;
  border: 1px solid var(--dark-line);
  color: var(--dark-muted);
  flex-shrink: 0;
}
.tag-kimi { color: #9fdcff; border-color: #245a78; }
.tag-codex { color: #c9d2ff; border-color: #40498c; }
.tag-cc { color: #ffd9a8; border-color: #7a5a2b; }
.tag-oc { color: #c4f0d0; border-color: #2b6b45; }

.mock-user {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px;
  border-top: 1px solid var(--dark-line);
  color: var(--dark-muted);
}
.avatar { font-size: 15px; }
.credit {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ok);
}

/* 右侧对话区 */
.mock-chat {
  padding: 18px 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 12.5px;
}

.bubble {
  max-width: 86%;
  border-radius: 14px;
  padding: 9px 13px;
  line-height: 1.55;
}
.bubble.user {
  align-self: flex-end;
  background: var(--brand);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.bubble.agent {
  align-self: flex-start;
  background: var(--dark-3);
  color: var(--dark-text);
  border-bottom-left-radius: 4px;
  padding: 11px 13px;
}
.bubble.queued {
  align-self: flex-end;
  background: transparent;
  border: 1px dashed var(--dark-line);
  color: var(--dark-muted);
}
.q-badge {
  font-size: 10px;
  font-weight: 600;
  color: var(--warn);
  border: 1px solid rgba(247, 144, 9, .45);
  border-radius: 999px;
  padding: 0 7px;
  margin-right: 7px;
}

.tool-card {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--dark-1);
  border: 1px solid var(--dark-line);
  border-radius: 10px;
  padding: 7px 11px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--dark-text);
  margin-bottom: 7px;
}
.tool-ic { font-size: 12px; }
.chev { margin-left: auto; color: var(--dark-muted); }
.diff-add { color: #4ade80; font-size: 10.5px; }
.diff-del { color: #f87171; font-size: 10.5px; }

.think {
  font-size: 11px;
  color: var(--dark-muted);
  border-left: 2px solid var(--dark-line);
  padding-left: 9px;
  margin-bottom: 7px;
}
.agent-text code {
  background: var(--dark-1);
  border-color: var(--dark-line);
  color: #9fdcff;
}

.mock-input {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--dark-1);
  border: 1px solid var(--dark-line);
  border-radius: 12px;
  padding: 9px 11px;
}
.chip {
  font-size: 11px;
  font-family: var(--mono);
  color: var(--dark-text);
  background: var(--dark-3);
  border: 1px solid var(--dark-line);
  border-radius: 999px;
  padding: 2px 10px;
  flex-shrink: 0;
}
.chip-send { color: #fff; background: var(--brand); border-color: var(--brand); }
.input-line {
  flex: 1;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--dark-3), var(--dark-3) 55%, transparent 55%);
}

/* 悬浮气泡 */
.mock-float {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-soft);
  padding: 7px 15px;
  white-space: nowrap;
}
.mock-float-1 { top: -14px; right: 22px; color: var(--brand); }
.mock-float-2 { bottom: -16px; left: 14px; }

/* ============================================================
   区块通用
   ============================================================ */
.section { padding: 88px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section-head { max-width: 640px; margin-bottom: 46px; }
.section-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 10px;
}
.section-title { font-size: 32px; font-weight: 800; letter-spacing: -.3px; line-height: 1.3; }
.section-desc { margin-top: 14px; color: var(--text-soft); font-size: 15.5px; }
.inline-link { font-weight: 600; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  box-shadow: var(--shadow-soft);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: #d5d9e3;
}
.card-ic {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 23px;
  background: var(--brand-soft);
  border-radius: 14px;
  margin-bottom: 16px;
}
.card-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.card-text { font-size: 14.5px; color: var(--text-soft); }

.card-credit { text-align: center; }
.card-credit .card-ic { margin-left: auto; margin-right: auto; }

.badge-list {
  list-style: none;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 13.5px;
  color: var(--text-soft);
}
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--warn);
  background: #fef4e6;
  border: 1px solid #f8ddb5;
  border-radius: 999px;
  padding: 1px 9px;
  margin-right: 8px;
  vertical-align: 1px;
}

/* ---------- 工作方式三步 ---------- */
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  counter-reset: step;
}
.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 26px 28px;
  box-shadow: var(--shadow-soft);
}
.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--dark-1);
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  margin-bottom: 16px;
}
.step-title { font-size: 17.5px; font-weight: 700; margin-bottom: 8px; }
.step-text { font-size: 14.5px; color: var(--text-soft); }

/* ---------- 下载区 ---------- */
.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 44px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 46px 44px;
}
.download-desc { margin-top: 14px; color: var(--text-soft); font-size: 15px; margin-bottom: 26px; }
.download-note { margin-top: 16px; font-size: 13px; color: var(--muted); }
.download-panel .btn-disabled { display: inline-flex; }

.download-meta {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 8px 22px;
}
.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.meta-row:last-child { border-bottom: none; }
.meta-row span { color: var(--muted); }
.meta-row b { font-weight: 600; }
.meta-soon { color: var(--warn); }

/* ---------- CTA 横幅 ---------- */
.cta {
  background:
    radial-gradient(700px 300px at 80% -20%, rgba(99, 91, 255, .35), transparent 65%),
    var(--dark-1);
  color: #fff;
  padding: 74px 0;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  flex-wrap: wrap;
}
.cta-title { font-size: 30px; font-weight: 800; letter-spacing: -.3px; }
.cta-desc { margin-top: 10px; color: #b6bcd8; font-size: 15.5px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ============================================================
   页脚（深色对比）
   ============================================================ */
.footer {
  background: var(--dark-2);
  color: var(--dark-muted);
  border-top: 1px solid var(--dark-line);
  padding: 40px 0;
  font-size: 14px;
}
.footer-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px 32px;
}
.footer-brand { display: flex; align-items: baseline; gap: 14px; }
.footer-logo { font-size: 19px; font-weight: 800; color: #fff; }
.footer-slogan { font-family: var(--mono); font-size: 13px; color: var(--dark-muted); }
.footer-nav { display: flex; gap: 22px; flex-wrap: wrap; margin-left: auto; }
.footer-nav a { color: var(--dark-muted); }
.footer-nav a:hover { color: #fff; }
.footer-copy { width: 100%; margin: 0; color: #6b7194; font-size: 13px; border-top: 1px solid var(--dark-line); padding-top: 16px; }

/* ============================================================
   响应式 — 850px
   ============================================================ */
@media (max-width: 850px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 52px;
    padding-top: 56px;
    padding-bottom: 64px;
  }
  .hero-title { font-size: 36px; }
  .hero-visual { max-width: 560px; }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }

  .download-panel { grid-template-columns: 1fr; padding: 34px 28px; gap: 30px; }

  .topnav a:not(.topnav-ext) { display: none; }
  .topbar-inner { gap: 16px; }
}

/* ============================================================
   响应式 — 520px
   ============================================================ */
@media (max-width: 520px) {
  .container { padding: 0 18px; }

  .hero-title { font-size: 30px; }
  .hero-slogan { font-size: 18px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .btn-note { display: none; }

  .grid-3 { grid-template-columns: 1fr; }

  .mock-body { grid-template-columns: 118px minmax(0, 1fr); }
  .mock-side { font-size: 10.5px; padding: 10px 7px; }
  .mock-chat { padding: 13px 11px 10px; font-size: 11.5px; }
  .mock-float { font-size: 11px; padding: 5px 11px; }
  .mock-float-1 { right: 8px; }

  .section { padding: 60px 0; }
  .section-title { font-size: 26px; }

  .cta-inner { flex-direction: column; align-items: flex-start; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { flex: 1; justify-content: center; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 14px; }
  .footer-nav { margin-left: 0; }
}