/* 前台站点样式 · 配色参考 api-new.ifphp.com（浅色冷灰底 + 紫罗兰主色）
   布局沿用现有结构；类名 s- 前缀，与后台 app.css 互不影响 */

:root {
  --s-primary: #6d5efc;
  --s-primary-hover: #5a4bf0;
  --s-primary-soft: rgba(109, 94, 252, .10);
  --s-bg: #f6f7fb;
  --s-card: #ffffff;
  --s-text: #111827;
  --s-muted: #6b7280;
  --s-faint: #9aa1b1;
  --s-border: #eceef5;
  --s-dark: #0f172a;
  --s-radius: 14px;
  --s-container: 1200px;
}

* { box-sizing: border-box; }
html, body.s-site { margin: 0; padding: 0; }
body.s-site {
  /* 让文档页等复用 app.css 的组件也跟随紫色主色 */
  --primary: #6d5efc;
  --accent: #6d5efc;
  --brand: #8b7cff;
  --grad: linear-gradient(120deg, #6d5efc 0%, #8b5cf6 52%, #a855f7 100%);
  background: var(--s-bg);
  color: var(--s-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.s-site a { color: var(--s-primary); text-decoration: none; }
body.s-site a:hover { color: var(--s-primary-hover); }
.s-container { max-width: var(--s-container); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.s-nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid var(--s-border);
  backdrop-filter: blur(12px);
}
.s-nav-inner {
  max-width: var(--s-container); margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; gap: 32px;
}
.s-brand { display: flex; align-items: center; gap: 10px; color: var(--s-text); min-width: 0; }
.s-brand:hover { color: var(--s-primary); }
.s-brand-mark {
  width: 34px; height: 34px; border-radius: 10px; flex-shrink: 0;
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 13px;
  background: linear-gradient(135deg, #7c6bff, #a78bfa);
  box-shadow: 0 6px 18px rgba(109, 94, 252, .28);
}
.s-brand-text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.s-brand-text b { font-size: 16px; font-weight: 800; letter-spacing: -.2px; white-space: nowrap; }
.s-brand-text small { font-size: 10px; color: var(--s-faint); letter-spacing: .1em; text-transform: uppercase; }
.s-brand-logo { height: 34px; width: auto; max-width: 160px; object-fit: contain; display: block; }
.s-announce { background: rgba(79, 140, 255, .07); border-bottom: 1px solid var(--s-border); }
.s-announce .s-nav-inner { display: flex; align-items: center; gap: 10px; padding-top: 10px; padding-bottom: 10px; font-size: 13px; color: var(--s-text); }
.s-announce-tag { flex: none; padding: 2px 8px; border-radius: 999px; background: var(--s-primary); color: #fff; font-size: 11px; }
.s-menu { display: flex; align-items: center; gap: 24px; }
.s-menu a { color: var(--s-muted); font-size: 14px; }
.s-menu a:hover, .s-menu a.active { color: var(--s-primary); }
.s-nav-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* 按钮 */
.s-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 38px; padding: 0 18px; border-radius: 9px; border: 1px solid transparent;
  font-size: 14px; font-weight: 600; cursor: pointer; transition: .16s; white-space: nowrap;
}
.s-btn-primary { background: var(--s-primary); color: #fff; box-shadow: 0 8px 20px rgba(109, 94, 252, .24); }
.s-btn-primary:hover { background: var(--s-primary-hover); color: #fff; transform: translateY(-1px); }
.s-btn-ghost { background: #fff; border-color: var(--s-border); color: var(--s-text); }
.s-btn-ghost:hover { background: #faf9ff; border-color: #cdc4ff; color: var(--s-primary); }
.s-btn-line { background: #fff; border-color: var(--s-border); color: var(--s-text); }
.s-btn-line:hover { border-color: #cdc4ff; color: var(--s-primary); }
.s-btn-lg { height: 46px; padding: 0 26px; font-size: 15px; border-radius: 11px; }
.s-btn-block { display: flex; width: 100%; }

/* ---------- Hero ---------- */
.s-hero {
  position: relative; overflow: hidden; text-align: center;
  padding: 76px 24px 68px;
  background:
    radial-gradient(900px 420px at 50% -8%, rgba(109, 94, 252, .16) 0%, rgba(109, 94, 252, 0) 62%),
    linear-gradient(180deg, #ffffff 0%, #f6f4ff 100%);
  color: var(--s-text);
}
.s-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(17, 24, 39, .045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(17, 24, 39, .045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 72%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000 0%, transparent 72%);
}
.s-hero > * { position: relative; }
.s-hero h1 {
  margin: 0 0 16px; font-size: 46px; line-height: 1.15; letter-spacing: -1px; font-weight: 800;
  background: linear-gradient(120deg, #1b1f33 0%, #3b2fb8 55%, #7c6bff 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.s-hero p.lead {
  margin: 0 auto; max-width: 660px; color: var(--s-muted); font-size: 15px; line-height: 1.75;
}
.s-search {
  display: flex; gap: 8px; max-width: 540px; margin: 28px auto 0;
}
.s-search input {
  flex: 1; min-width: 0; height: 46px; padding: 0 16px; border-radius: 10px;
  border: 1px solid var(--s-border); background: #fff;
  color: var(--s-text); font-size: 14px; outline: none; transition: .16s;
  box-shadow: 0 6px 18px rgba(23, 32, 66, .05);
}
.s-search input::placeholder { color: var(--s-faint); }
.s-search input:focus { border-color: #b9aeff; box-shadow: 0 0 0 3px rgba(109, 94, 252, .14); }
.s-hero-actions { display: flex; gap: 12px; justify-content: center; margin-top: 26px; }

.s-stats {
  display: flex; justify-content: center; gap: 0; margin-top: 48px; flex-wrap: wrap;
}
.s-stat { padding: 0 44px; text-align: center; }
.s-stat + .s-stat { border-left: 1px solid var(--s-border); }
.s-stat b { display: block; font-size: 30px; font-weight: 800; letter-spacing: -.5px; color: var(--s-primary); line-height: 1.2; }
.s-stat span { display: block; margin-top: 6px; font-size: 12.5px; color: var(--s-muted); letter-spacing: .02em; }

/* ---------- 通用区块 ---------- */
.s-section { padding: 64px 0; }
.s-section.alt { background: #fff; }
.s-head { text-align: center; margin-bottom: 38px; }
.s-head span.eyebrow {
  display: inline-block; margin-bottom: 10px; padding: 4px 12px; border-radius: 999px;
  font-size: 11.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--s-primary); background: var(--s-primary-soft);
}
.s-head h2 { margin: 0 0 10px; font-size: 28px; letter-spacing: -.6px; }
.s-head p { margin: 0 auto; max-width: 620px; color: var(--s-muted); }

/* ---------- 接口列表 ---------- */
.s-api-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.s-api-card {
  display: flex; flex-direction: column; padding: 18px;
  background: var(--s-card); border: 1px solid var(--s-border); border-radius: var(--s-radius);
  transition: .18s;
}
.s-api-card:hover { transform: translateY(-3px); border-color: #cdc4ff; box-shadow: 0 14px 32px rgba(109, 94, 252, .12); }
.s-api-icon {
  width: 42px; height: 42px; border-radius: 11px; margin-bottom: 14px;
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 15px;
  background: linear-gradient(135deg, #7c6bff, #6366f1);
}
.s-api-grid .s-api-card:nth-child(4n+2) .s-api-icon { background: linear-gradient(135deg, #10b981, #059669); }
.s-api-grid .s-api-card:nth-child(4n+3) .s-api-icon { background: linear-gradient(135deg, #f59e0b, #ea580c); }
.s-api-grid .s-api-card:nth-child(4n+4) .s-api-icon { background: linear-gradient(135deg, #8b5cf6, #d946ef); }
.s-api-card h3 { margin: 0 0 6px; font-size: 15px; font-weight: 700; }
.s-api-card .s-api-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px; color: var(--s-faint); word-break: break-all;
}
.s-api-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--s-border); }
.s-api-price { font-size: 13px; font-weight: 700; color: var(--s-primary); }
.s-api-price small { font-weight: 400; color: var(--s-faint); }
.s-api-link { font-size: 13px; font-weight: 600; }
.s-empty { padding: 48px 0; text-align: center; color: var(--s-faint); }

/* ---------- 特性 ---------- */
.s-feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.s-feature {
  padding: 24px; background: var(--s-card); border: 1px solid var(--s-border);
  border-radius: var(--s-radius); transition: .18s;
}
.s-feature:hover { border-color: #cdc4ff; box-shadow: 0 14px 32px rgba(109, 94, 252, .10); }
.s-feature-icon {
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 16px;
  display: grid; place-items: center; color: var(--s-primary); background: var(--s-primary-soft);
}
.s-feature h3 { margin: 0 0 8px; font-size: 16px; }
.s-feature p { margin: 0; color: var(--s-muted); font-size: 13.5px; }

/* ---------- 价格 ---------- */
.s-price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: stretch; }
.s-price {
  position: relative; display: flex; flex-direction: column; padding: 26px;
  background: var(--s-card); border: 1px solid var(--s-border); border-radius: 16px;
}
.s-price.hot { border-color: var(--s-primary); box-shadow: 0 18px 44px rgba(109, 94, 252, .18); }
.s-price-tag {
  position: absolute; top: -11px; left: 26px; padding: 3px 10px; border-radius: 999px;
  background: var(--s-primary); color: #fff; font-size: 11px; font-weight: 700;
}
.s-price h3 { margin: 0 0 12px; font-size: 15px; color: var(--s-muted); font-weight: 600; }
.s-price .amount { font-size: 32px; font-weight: 800; letter-spacing: -1px; line-height: 1.1; }
.s-price .amount small { font-size: 13px; font-weight: 500; color: var(--s-faint); letter-spacing: 0; }
.s-price ul { margin: 20px 0 24px; padding: 0; list-style: none; }
.s-price ul li { position: relative; padding-left: 20px; margin-bottom: 9px; color: var(--s-muted); font-size: 13.5px; }
.s-price ul li::before {
  content: ""; position: absolute; left: 2px; top: 8px; width: 6px; height: 6px;
  border-radius: 50%; background: var(--s-primary); opacity: .6;
}
.s-price .s-btn { margin-top: auto; }

/* ---------- FAQ ---------- */
.s-faq { max-width: 820px; margin: 0 auto; }
.s-faq details {
  margin-bottom: 10px; padding: 16px 20px; background: var(--s-card);
  border: 1px solid var(--s-border); border-radius: 12px;
}
.s-faq summary { cursor: pointer; font-weight: 600; font-size: 14.5px; list-style: none; }
.s-faq summary::-webkit-details-marker { display: none; }
.s-faq summary::after { content: "+"; float: right; color: var(--s-faint); font-weight: 400; }
.s-faq details[open] summary::after { content: "−"; }
.s-faq details p { margin: 12px 0 0; color: var(--s-muted); font-size: 13.5px; }

/* ---------- CTA ---------- */
.s-cta {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 40px; border-radius: 18px; color: #fff;
  background: linear-gradient(120deg, #6d5efc 0%, #8b5cf6 55%, #a855f7 100%);
  box-shadow: 0 24px 60px rgba(109, 94, 252, .26);
}
.s-cta h2 { margin: 0 0 8px; font-size: 24px; letter-spacing: -.4px; }
.s-cta p { margin: 0; color: rgba(255, 255, 255, .82); }
.s-cta .actions { display: flex; gap: 10px; flex-shrink: 0; }
.s-cta .s-btn-primary { background: #fff; color: var(--s-primary); box-shadow: none; }
.s-cta .s-btn-primary:hover { background: #f6f4ff; color: var(--s-primary-hover); }
.s-cta .s-btn-ghost { background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .38); color: #fff; }
.s-cta .s-btn-ghost:hover { background: rgba(255, 255, 255, .24); color: #fff; }

/* ---------- 页脚 ---------- */
.s-footer { background: #fff; border-top: 1px solid var(--s-border); color: var(--s-muted); padding: 30px 0; }
.s-footer .s-container { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; }
.s-footer a { color: var(--s-muted); }
.s-footer a:hover { color: var(--s-primary); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .s-api-grid { grid-template-columns: repeat(3, 1fr); }
  .s-feature-grid, .s-price-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .s-menu { display: none; }
  .s-nav-inner { gap: 16px; }
  .s-hero h1 { font-size: 34px; }
  .s-api-grid { grid-template-columns: repeat(2, 1fr); }
  .s-stat { padding: 0 24px; }
}
@media (max-width: 640px) {
  .s-nav-inner { gap: 10px; padding: 0 14px; }
  .s-brand-mark { width: 30px; height: 30px; border-radius: 8px; font-size: 12px; }
  .s-brand-text small { display: none; }
  .s-nav-actions .s-btn-ghost { display: none; }
  .s-btn { height: 34px; padding: 0 14px; font-size: 13px; }
  .s-btn-lg { height: 46px; padding: 0 18px; font-size: 14px; }

  .s-hero { padding: 56px 20px 48px; }
  .s-hero h1 { font-size: 28px; }
  .s-stats { gap: 14px; }
  .s-stat { padding: 0; flex: 1; min-width: 96px; }
  .s-stat + .s-stat { border-left: 0; }
  .s-stat b { font-size: 24px; }
  .s-api-grid, .s-feature-grid, .s-price-grid { grid-template-columns: 1fr; }
  .s-section { padding: 44px 0; }
  .s-cta { flex-direction: column; align-items: flex-start; padding: 28px; }
  .s-cta h2 { font-size: 20px; }
  .s-footer .s-container { flex-direction: column; align-items: flex-start; }
}

/* ---------- 颜色优先级修正 ----------
   通用链接规则 body.s-site a 会覆盖组件自身颜色，这里显式提权 */
body.s-site .s-brand { color: var(--s-text); }
body.s-site .s-brand:hover { color: var(--s-primary); }
body.s-site .s-menu a { color: var(--s-muted); }
body.s-site .s-menu a:hover,
body.s-site .s-menu a.active { color: var(--s-primary); }
body.s-site .s-btn-primary { color: #fff; }
body.s-site .s-btn-primary:hover { color: #fff; }
body.s-site .s-btn-ghost { color: var(--s-text); }
body.s-site .s-btn-ghost:hover { color: var(--s-primary); }
body.s-site .s-btn-line { color: var(--s-text); }
body.s-site .s-btn-line:hover { color: var(--s-primary); }
body.s-site .s-footer a { color: var(--s-muted); }
body.s-site .s-footer a:hover { color: var(--s-primary); }

/* CTA 区是紫底，主按钮反转为白底紫字 */
body.s-site .s-cta .s-btn-primary { color: var(--s-primary); }
body.s-site .s-cta .s-btn-primary:hover { color: var(--s-primary-hover); }
body.s-site .s-cta .s-btn-ghost { color: #fff; }
body.s-site .s-cta .s-btn-ghost:hover { color: #fff; }

/* 文档页复用 app.css 组件时的颜色修正 */
body.s-site .btn { color: var(--text); }
body.s-site .btn:hover { color: var(--text); }
body.s-site .btn-primary,
body.s-site .btn-primary:hover { color: #fff; }
body.s-site .btn-primary { background: var(--s-primary); }
body.s-site .btn-primary:hover { background: var(--s-primary-hover); box-shadow: 0 10px 24px rgba(109, 94, 252, .3); }
body.s-site .btn-grad,
body.s-site .btn-grad:hover,
body.s-site .btn-danger,
body.s-site .btn-danger:hover { color: #fff; }
body.s-site .nav-item { color: var(--text-muted); }
body.s-site .nav-item:hover { color: var(--text); }
body.s-site .nav-item.active { color: var(--accent); }
body.s-site .footer a { color: var(--text-faint); }
body.s-site .footer a:hover { color: var(--accent); }