/* AI租 宣传落地页 — 静态样式 + 轻量滚动显现脚本 */

:root {
  --color-primary: #FF6A00;
  --color-primary-hover: #FF8A33;
  --color-primary-active: #E55D00;
  --color-bg-layout: #F7F7F7;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #666666;
  --color-success: #00B578;
  --color-info: #1677FF;
  --color-border: #ECECEC;
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 24px;
  --shadow: 0 8px 24px rgba(26, 26, 26, .06);
  --shadow-lg: 0 18px 48px rgba(26, 26, 26, .12);
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text-primary);
  background: #FFFFFF;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
section[id] { scroll-margin-top: 84px; }

:focus-visible { outline: 3px solid var(--color-info); outline-offset: 3px; border-radius: 4px; }

.container { width: min(1200px, calc(100% - 48px)); margin-inline: auto; }
.container--narrow { width: min(820px, calc(100% - 48px)); }

.skip-link {
  position: absolute; left: -9999px; top: 8px; z-index: 100;
  padding: 10px 18px; background: #fff; color: var(--color-primary);
  border-radius: var(--radius-sm); box-shadow: var(--shadow-lg);
}
.skip-link:focus { left: 16px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 50px; padding: 0 28px;
  border-radius: 999px; font-size: 15px; font-weight: 600;
  letter-spacing: .2px; white-space: nowrap;
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--sm { min-height: 40px; padding: 0 20px; font-size: 14px; }
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: 0 6px 16px rgba(255, 106, 0, .24); }
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--light { background: #fff; color: var(--color-primary-active); box-shadow: 0 10px 28px rgba(0, 0, 0, .12); }
.btn--light:hover { box-shadow: 0 14px 32px rgba(0, 0, 0, .18); }
.btn--ghost-light { border: 1px solid rgba(255, 255, 255, .7); color: #fff; }
.btn--ghost-light:hover { background: rgba(255, 255, 255, .14); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: saturate(180%) blur(12px);
}
.nav { display: flex; align-items: center; gap: 32px; min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: none; }
/* 品牌 logo（assets/logo.png）：替代原 CSS 占位图形 */
.brand__mark {
  display: block; width: 32px; height: 32px; flex: none;
  border-radius: 10px; object-fit: contain;
  box-shadow: 0 4px 10px rgba(26, 26, 26, .12);
}
.brand__name { font-size: 20px; font-weight: 700; letter-spacing: .5px; }
.brand__slogan {
  font-size: 12px; color: var(--color-text-secondary);
  padding-left: 12px; margin-left: 2px; border-left: 1px solid var(--color-border);
  white-space: nowrap;
}
.nav__links { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.nav__links a { font-size: 14px; color: #444; transition: color .2s ease; }
.nav__links a:hover { color: var(--color-primary); }
.nav__cta { flex: none; }

/* ---------- Hero ---------- */
.hero {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -140px; top: -180px;
  width: 520px; height: 520px; border-radius: 50%;
  background: rgba(255, 255, 255, .08); pointer-events: none;
}
.hero::before {
  content: ""; position: absolute; left: -120px; bottom: -160px;
  width: 380px; height: 380px; border-radius: 50%;
  background: rgba(255, 255, 255, .06); pointer-events: none;
  animation: orbDrift 9s ease-in-out infinite alternate;
}
@keyframes orbDrift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(40px, -28px) scale(1.08); }
}

/* Hero 入场动画：文案与二维码卡依次上浮 */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(26px); }
  to { opacity: 1; transform: none; }
}
.hero__copy > * { animation: fadeUp .7s ease both; }
.hero__copy > *:nth-child(1) { animation-delay: .05s; }
.hero__copy > *:nth-child(2) { animation-delay: .12s; }
.hero__copy > *:nth-child(3) { animation-delay: .2s; }
.hero__copy > *:nth-child(4) { animation-delay: .28s; }
.hero__copy > *:nth-child(5) { animation-delay: .36s; }
.hero__copy > *:nth-child(6) { animation-delay: .44s; }
.qr-card { animation: fadeUp .7s ease .3s both; }
.hero__inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 72px;
  align-items: center; padding-block: 88px 96px;
}
.hero__eyebrow {
  display: inline-block; margin-bottom: 20px; padding: 6px 16px;
  font-size: 13px; letter-spacing: 1px;
  border: 1px solid rgba(255, 255, 255, .5); border-radius: 999px;
  background: rgba(255, 255, 255, .12);
}
.hero h1 { font-size: clamp(38px, 5vw, 60px); line-height: 1.2; font-weight: 700; letter-spacing: 2px; }
.hero__dot { opacity: .7; padding-inline: 4px; }
.hero__lead { margin-top: 18px; font-size: clamp(19px, 2.2vw, 24px); font-weight: 500; }
.hero__desc { margin-top: 16px; max-width: 620px; font-size: 15px; line-height: 1.9; color: rgba(255, 255, 255, .92); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__note { margin-top: 18px; font-size: 13px; color: rgba(255, 255, 255, .82); }

.qr-card {
  scroll-margin-top: 100px;
  background: #fff; color: var(--color-text-primary);
  border-radius: var(--radius-lg); padding: 28px 26px 24px;
  text-align: center; box-shadow: var(--shadow-lg);
}
.qr-card__title { font-size: 17px; font-weight: 600; }
.qr-card__figure { margin-block: 18px 10px; }
.qr-card__figure img {
  width: 240px; height: 240px; margin-inline: auto;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  padding: 8px; background: #fff; object-fit: contain;
}
.qr-card__figure figcaption { margin-top: 12px; font-size: 13px; color: var(--color-text-secondary); }
.qr-card__hint { font-size: 13px; color: var(--color-text-secondary); }

/* ---------- 特性条 ---------- */
.strip { border-bottom: 1px solid var(--color-border); background: #fff; }
.strip__list { display: grid; grid-template-columns: repeat(4, 1fr); }
.strip__list li {
  padding: 26px 20px; text-align: center;
  border-right: 1px solid var(--color-border);
}
.strip__list li:last-child { border-right: 0; }
.strip__list strong { display: block; font-size: 16px; font-weight: 600; color: var(--color-primary-active); }
.strip__list span { display: block; margin-top: 4px; font-size: 13px; color: var(--color-text-secondary); }

/* ---------- 通用区块 ---------- */
.section { padding-block: 88px; }
.section--tint { background: var(--color-bg-layout); }
.section__eyebrow {
  display: inline-block; margin-bottom: 14px; padding-left: 12px;
  font-size: 13px; font-weight: 600; letter-spacing: 2px; color: var(--color-primary-active);
  border-left: 3px solid var(--color-primary);
}
.section__title { font-size: clamp(26px, 3.2vw, 36px); line-height: 1.4; font-weight: 700; letter-spacing: .5px; }
.section__intro { margin-top: 16px; max-width: 800px; font-size: 16px; color: var(--color-text-secondary); }

/* ---------- 滚动显现动画（配合页面底部轻量脚本） ---------- */
[data-reveal] { opacity: 0; transform: translateY(30px); transition: opacity .7s ease, transform .7s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
/* 区块内卡片依次浮现（stagger） */
[data-reveal] .card, [data-reveal] .step, [data-reveal] .cat { transition-delay: 0s; }
[data-reveal].is-visible .card:nth-child(2), [data-reveal].is-visible .step:nth-child(2), [data-reveal].is-visible .cat:nth-child(2) { transition-delay: .06s; }
[data-reveal].is-visible .card:nth-child(3), [data-reveal].is-visible .step:nth-child(3), [data-reveal].is-visible .cat:nth-child(3) { transition-delay: .12s; }
[data-reveal].is-visible .card:nth-child(4), [data-reveal].is-visible .step:nth-child(4), [data-reveal].is-visible .cat:nth-child(4) { transition-delay: .18s; }
[data-reveal].is-visible .card:nth-child(5), [data-reveal].is-visible .step:nth-child(5), [data-reveal].is-visible .cat:nth-child(5) { transition-delay: .24s; }
[data-reveal].is-visible .card:nth-child(6), [data-reveal].is-visible .step:nth-child(6), [data-reveal].is-visible .cat:nth-child(6) { transition-delay: .3s; }
[data-reveal].is-visible .cat:nth-child(7) { transition-delay: .36s; }
[data-reveal].is-visible .cat:nth-child(8) { transition-delay: .42s; }
[data-reveal].is-visible .cat:nth-child(9) { transition-delay: .48s; }
[data-reveal].is-visible .cat:nth-child(10) { transition-delay: .54s; }
[data-reveal].is-visible .cat:nth-child(11) { transition-delay: .6s; }
[data-reveal].is-visible .cat:nth-child(12) { transition-delay: .66s; }
[data-reveal] .card, [data-reveal] .step, [data-reveal] .cat { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease, box-shadow .25s ease, border-color .25s ease; }
[data-reveal].is-visible .card, [data-reveal].is-visible .step, [data-reveal].is-visible .cat { opacity: 1; transform: none; }

/* ---------- 导航滚动态 ---------- */
.site-header.is-scrolled { box-shadow: 0 6px 24px rgba(26, 26, 26, .08); }

.grid { display: grid; gap: 22px; margin-top: 44px; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: #fff; padding: 30px 28px;
  border: 1px solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card h3 { margin-top: 18px; font-size: 19px; font-weight: 600; }
.card p { margin-top: 10px; font-size: 14px; line-height: 1.85; color: var(--color-text-secondary); }
.card__badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 12px;
  background: #FFF0E6; color: var(--color-primary-active);
  font-size: 15px; font-weight: 700; letter-spacing: .5px;
}
.card--icon h3 { margin-top: 20px; }

.icon {
  position: relative; display: block; width: 52px; height: 52px;
  border-radius: 15px; background: #FFF0E6;
  transition: transform .3s ease;
}
.card:hover .icon { transform: scale(1.1) rotate(-4deg); }
.icon::before, .icon::after { content: ""; position: absolute; }
.icon--search::before {
  width: 16px; height: 16px; left: 13px; top: 13px;
  border: 2.5px solid var(--color-primary); border-radius: 50%;
}
.icon--search::after {
  width: 11px; height: 2.5px; left: 28px; top: 30px;
  background: var(--color-primary); border-radius: 2px; transform: rotate(45deg);
}
.icon--camera::before {
  width: 26px; height: 19px; left: 13px; top: 17px;
  border: 2.5px solid var(--color-primary); border-radius: 5px;
}
.icon--camera::after {
  width: 10px; height: 10px; left: 21px; top: 21px;
  border: 2.5px solid var(--color-primary); border-radius: 50%;
}
.icon--chat::before {
  width: 28px; height: 20px; left: 12px; top: 15px;
  border: 2.5px solid var(--color-primary); border-radius: 8px;
}
.icon--chat::after {
  width: 7px; height: 7px; left: 18px; top: 35px;
  background: var(--color-primary); transform: rotate(45deg);
}
.icon--spark::before {
  width: 18px; height: 18px; left: 17px; top: 17px;
  border: 2.5px solid var(--color-primary); border-radius: 4px; transform: rotate(45deg);
}
.icon--spark::after {
  width: 6px; height: 6px; left: 35px; top: 10px;
  background: var(--color-primary); border-radius: 50%;
}

/* ---------- 品类图标网格（与小程序支持分类一致） ---------- */
.cats {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 18px; margin-top: 40px;
}
.cat {
  margin: 0; padding: 26px 16px 22px; text-align: center;
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.cat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 106, 0, .35);
}
.cat img {
  width: 56px; height: 56px; margin-inline: auto;
  transition: transform .3s ease;
}
.cat:hover img { transform: scale(1.12); }
.cat figcaption { margin-top: 14px; font-size: 16px; font-weight: 600; }
.cat span { display: block; margin-top: 6px; font-size: 13px; color: var(--color-text-secondary); }
/* Cosplay 专区：主题色底强调 */
.cat--zone {
  background: linear-gradient(150deg, #FFF4EC, #fff);
  border-color: rgba(255, 106, 0, .3);
}
.cat--zone figcaption { color: var(--color-primary-active); }
.cats__note {
  margin-top: 24px; font-size: 14px; color: var(--color-text-secondary);
  text-align: center;
}

/* ---------- 租赁流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 18px; margin-top: 48px; }
.step {
  position: relative; padding: 26px 20px 24px;
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.step:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.step__num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-primary); color: #fff; font-size: 15px; font-weight: 700;
}
.step h3 { margin-top: 16px; font-size: 16px; font-weight: 600; }
.step p { margin-top: 8px; font-size: 13px; line-height: 1.8; color: var(--color-text-secondary); }

/* ---------- FAQ（原生 details，零 JS） ---------- */
.faq { margin-top: 36px; border-top: 1px solid var(--color-border); }
.faq details { border-bottom: 1px solid var(--color-border); background: #fff; }
.faq summary {
  position: relative; padding: 20px 52px 20px 22px;
  font-size: 16px; font-weight: 600; cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 24px; top: 27px;
  width: 9px; height: 9px; border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary); transform: rotate(45deg);
  transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(225deg); top: 30px; }
.faq summary:hover { color: var(--color-primary-active); }
.faq details p { padding: 0 22px 22px; font-size: 14px; line-height: 1.9; color: var(--color-text-secondary); animation: fadeUp .35s ease both; }

/* ---------- 底部 CTA ---------- */
.cta-bottom { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%); color: #fff; }
.cta-bottom__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  padding-block: 52px;
}
.cta-bottom h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 700; }
.cta-bottom p { margin-top: 8px; font-size: 15px; color: rgba(255, 255, 255, .9); }
.cta-bottom__qr { display: flex; align-items: center; gap: 18px; flex: none; }
.cta-bottom__qr img { border-radius: var(--radius-sm); background: #fff; padding: 6px; }
.cta-bottom__qr span { font-size: 14px; line-height: 1.7; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--color-bg-layout); border-top: 1px solid var(--color-border); }
.footer__inner { display: grid; grid-template-columns: 1.4fr 1fr 1.4fr; gap: 48px; padding-block: 56px 40px; }
.footer__brand p { margin-top: 8px; font-size: 14px; color: var(--color-text-secondary); }
.footer__small { margin-top: 6px !important; font-size: 13px !important; color: #8A8A8A !important; }
.footer__col h3 { font-size: 15px; font-weight: 600; margin-bottom: 14px; }
.footer__col ul { display: grid; gap: 8px; }
.footer__col a, .footer__col p { font-size: 14px; color: var(--color-text-secondary); }
.footer__col a:hover { color: var(--color-primary); }
.footer__bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px;
  padding-block: 20px 26px; border-top: 1px solid var(--color-border);
  font-size: 13px; color: #8A8A8A;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__inner { grid-template-columns: minmax(0, 1fr) 290px; gap: 40px; }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .nav__links { gap: 18px; }
  .brand__slogan { display: none; }
}
@media (max-width: 860px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .strip__list { grid-template-columns: repeat(2, 1fr); }
  .strip__list li:nth-child(2) { border-right: 0; }
  .strip__list li:nth-child(-n+2) { border-bottom: 1px solid var(--color-border); }
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 720px) {
  .container, .container--narrow { width: min(100% - 32px, 1200px); }
  .nav { min-height: 62px; gap: 12px; }
  .nav__links { display: none; }
  .nav__cta { margin-left: auto; }
  section[id] { scroll-margin-top: 72px; }
  .hero__inner { grid-template-columns: 1fr; gap: 36px; padding-block: 56px 60px; }
  .hero h1 { letter-spacing: 1px; }
  .qr-card { max-width: 320px; width: 100%; margin-inline: auto; }
  .section { padding-block: 60px; }
  .grid { margin-top: 32px; }
  .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 12px; }
  .cta-bottom__inner { flex-direction: column; align-items: flex-start; gap: 26px; }
  .footer__inner { grid-template-columns: 1fr; gap: 28px; padding-block: 40px 28px; }
  .footer__bottom { flex-direction: column; }
}
@media (max-width: 420px) {
  .btn { width: 100%; }
  .hero__actions { flex-direction: column; }
  .qr-card__figure img { width: 210px; height: 210px; }
  .strip__list { grid-template-columns: 1fr; }
  .strip__list li { border-right: 0; border-bottom: 1px solid var(--color-border); }
  .strip__list li:last-child { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  [data-reveal], [data-reveal] .card, [data-reveal] .step { opacity: 1; transform: none; }
}