/* AI 免费中转站 —— 浅色工具风 / 首屏 6 卡均匀填满 */

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

:root {
  --bg: #FAFAF8;
  --card: #FFFFFF;
  --border: #E7E5E0;
  --text: #1C1B18;
  --text-2: #57534E;
  --text-3: #79716B;
  --accent: #087A55;
  --accent-dark: #066A48;
  --ok: #087A55;
  --warn: #B45309;
  --bad: #B91C1C;
  --radius: 12px;
}

html { -webkit-text-size-adjust: 100%; height: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

/* 首屏填充：main 吃掉 hero 与 footer 之间的全部剩余高度 */
main { flex: 1 0 auto; display: flex; flex-direction: column; }
main > #services { flex: 1 0 auto; display: flex; flex-direction: column; }
main > #services > .container {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
}

.container { max-width: 1280px; margin: 0 auto; padding: 0 14px; width: 100%; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 8px 14px; border-radius: 0 0 8px 0; z-index: 10;
}
.skip-link:focus { left: 0; }

/* ---------- Hero：一条横幅 ---------- */
.hero { padding: 12px 0 10px; border-bottom: 1px solid var(--border); background: var(--card); }

.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 13px; color: var(--text-2);
}
.brand-logo { width: 20px; height: 20px; display: block; }

.hero h1 {
  margin-top: 6px;
  font-size: clamp(17px, 3.2vw, 28px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.hero-sub { margin-top: 3px; font-size: 12.5px; color: var(--text-2); max-width: 46em; }

/* ---------- 服务网格：6 卡均匀填满首屏 ---------- */
#services { padding: 10px 0 6px; }

.service-grid {
  flex: 1 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: 1fr;      /* 行高均分，卡片均匀拉伸 */
  gap: 8px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 10px 8px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  transition: box-shadow .15s ease, transform .15s ease;
}
.card:hover { box-shadow: 0 3px 14px rgba(28, 27, 24, .06); transform: translateY(-1px); }

.card-top { display: flex; align-items: center; gap: 6px; flex-wrap: nowrap; }
.card-name { font-weight: 700; font-size: 14px; min-width: 0; flex: 0 1 auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-status { flex: none; }

.badge {
  font-size: 10.5px; font-weight: 600; line-height: 1;
  padding: 3px 7px; border-radius: 999px; border: 1px solid transparent; white-space: nowrap;
}
.badge-free { color: var(--accent); background: #E8F4EE; border-color: #C6E3D5; }
.badge-paid { color: #92400E; background: #FdF1E2; border-color: #F0DDBE; }

.card-status {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11.5px; font-weight: 600; white-space: nowrap;
}
.dot { width: 7px; height: 7px; border-radius: 50%; flex: none; }
.st-ok .dot { background: var(--ok); }
.st-ok { color: var(--ok); }
.st-congested .dot { background: var(--warn); }
.st-congested { color: var(--warn); }
.st-closed .dot { background: var(--bad); }
.st-closed { color: var(--bad); }

.card-desc { margin-top: 4px; font-size: 12px; color: var(--text-2); }

.meta { margin-top: 6px; display: grid; gap: 3px; align-content: start; }
.meta-row { display: flex; gap: 6px; font-size: 11.5px; line-height: 1.4; }
.meta-key { color: var(--text-3); flex: none; }
.meta-val { color: var(--text); min-width: 0; overflow-wrap: anywhere; }

.stars { color: #D97706; letter-spacing: 1px; font-size: 11px; }
.stars .off { color: #D6D3D1; }

/* CTA：细长贴底、撑满卡片 */
.card-cta {
  margin-top: auto; padding-top: 8px;
}
.btn {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  width: 100%; min-height: 44px;
  background: var(--accent); color: #fff;
  font-size: 14px; font-weight: 600;
  border: none; border-radius: 9px;
  text-decoration: none; cursor: pointer;
  transition: background .15s ease;
}
.btn:hover { background: var(--accent-dark); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn[aria-disabled="true"] {
  background: #E7E5E0; color: var(--text-3); cursor: not-allowed;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--card);
  padding: 14px 0 16px;
  font-size: 12.5px; color: var(--text-2);
}
.footer strong { font-size: 13.5px; color: var(--text); }
.footer p { margin-top: 4px; }
.footer-aff { color: var(--text-3); line-height: 1.6; max-width: 62em; }

.noscript { margin-top: 10px; color: var(--bad); font-size: 13px; }

/* ---------- 断点 ---------- */
@media (max-width: 379px) {
  body { font-size: 14px; }
  .meta-val { font-size: 11px; }
}

/* 平板/桌面：3 列 */
@media (min-width: 640px) {
  .service-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .hero { padding: 14px 0 12px; }
  #services { padding: 12px 0 8px; }
  .card { padding: 14px 14px 12px; }
  .card-desc { margin-top: 5px; font-size: 12.5px; }
  .meta { margin-top: 8px; gap: 4px; }
  .meta-row { font-size: 12.5px; }
  .footer { padding: 16px 0 20px; }
}

@media (min-width: 1024px) {
  .hero h1 { font-size: 26px; }
  .service-grid { gap: 12px; }
  .btn { min-height: 46px; }
}

/* 手机竖屏：压缩卡片最小内容高度，让 3 行均分后能被首屏容纳 */
@media (max-width: 639px) and (orientation: portrait) {
  .hero { padding: 10px 0 8px; }
  .hero-sub { display: none; }
  .hero h1 { margin-top: 4px; }
  #services { padding: 7px 0 4px; }
  .service-grid { gap: 6px; }
  .card { padding: 8px 8px 7px; }
  .badge-free { display: none; }   /* 手机端省宽：免费/付费以页脚说明与额度行区分 */
  .card-top { gap: 5px; }
  .card-desc { display: none; }   /* 信息与"模型"行重复，省高度 */
  .meta { margin-top: 0; gap: 3px; }
  .meta-row { font-size: 11.5px; }
  .meta-row .meta-val { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .card-cta { padding-top: 5px; }
  .btn { min-height: 38px; font-size: 13.5px; }
  .footer { padding: 8px 0 10px; font-size: 11.5px; }
}

/* 高度紧张的手机横屏：压缩 hero */
@media (max-height: 480px) and (orientation: landscape) {
  .hero { padding: 8px 0 6px; }
  .hero h1 { margin-top: 3px; font-size: 16px; }
  .hero-sub { display: none; }
  .btn { min-height: 38px; }
}

/* 矮屏手机（高≤640）：紧凑保底，防溢出 */
@media (max-height: 640px) and (orientation: portrait) {
  .hero { padding: 6px 0 5px; }
  .hero h1 { font-size: 15px; }
  #services { padding: 6px 0 3px; }
  .service-grid { gap: 5px; }
  .card { padding: 7px 7px 6px; }
  .meta { gap: 2px; }
  .meta-row { font-size: 10.5px; line-height: 1.3; }
  .btn { min-height: 36px; font-size: 13px; }
  .footer { padding: 5px 0 7px; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}