/* ============================================================
   去想 OutOfMindS · 官网样式（2026-09 重设计）
   色板唯一事实源 = App 内 Sources/Canvas/Theme.swift 的 dual token，
   浅色/深色两档一一对应；改 App 配色时请同步这里。
   ============================================================ */

:root {
  --font-display: "ZCOOL XiaoWei", "STKaiti", "KaiTi", serif;
  --font-latin: "Marcellus", Georgia, serif;
  --font-body: "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;

  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --container: 1180px;
  --ease: cubic-bezier(.22, .9, .3, 1);
}

/* ---- 浅色（默认）---- */
:root, :root[data-theme="light"] {
  --bg: #FDFDFC;
  --bg-elevated: #FFFFFF;
  --bg-soft: #F6F4EF;
  --ink: #303331;
  --ink-2: #68716D;
  --hairline: rgba(48, 51, 49, .12);
  --accent: #B89A6D;        /* 陶土金 */
  --accent-strong: #96754A;
  --accent-soft: rgba(184, 154, 109, .14);
  --celadon: #2E9E96;       /* 青瓷 */
  --jade: #1E9E72;          /* 玉绿 */
  --robe: #2A7FB8;          /* 袍蓝 */
  --terra: #C0522E;         /* 陶纹红 */
  --amber: #E8A93A;         /* 琥珀（AI） */
  --umber: #7A6F5D;
  --night-bg: #23211C;      /* 夜航段 */
  --night-ink: #F2EBDD;
  --shadow: 0 18px 50px -24px rgba(48, 51, 49, .28);
  --shadow-soft: 0 10px 30px -18px rgba(48, 51, 49, .22);
  /* 三色编织带 */
  --weave: repeating-linear-gradient(115deg,
      #C4593B 0 9px, #A8492E 9px 12px, #E8A93A 12px 17px,
      #8A3E28 17px 20px, #2E9E96 20px 24px);
}

/* ---- 深色 ---- */
:root[data-theme="dark"] {
  --bg: #1D201E;
  --bg-elevated: #282A28;
  --bg-soft: #232522;
  --ink: #F2EBDD;
  --ink-2: #97A0B2;
  --hairline: rgba(242, 235, 221, .14);
  --accent: #D8B573;
  --accent-strong: #E4C68C;
  --accent-soft: rgba(216, 181, 115, .16);
  --celadon: #4FBFB6;
  --jade: #3FBF8E;
  --robe: #4FA8DC;
  --terra: #E87A50;
  --amber: #F0B840;
  --umber: #A79B85;
  --night-bg: #171916;
  --night-ink: #F2EBDD;
  --shadow: 0 18px 50px -24px rgba(0, 0, 0, .6);
  --shadow-soft: 0 10px 30px -18px rgba(0, 0, 0, .5);
  --weave: repeating-linear-gradient(115deg,
      #E87A50 0 9px, #B85A3A 9px 12px, #F0B840 12px 17px,
      #A04A32 17px 20px, #4FBFB6 20px 24px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* 陶土颗粒 */
.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 3; opacity: .5;
  background-image: radial-gradient(rgba(48,51,49,.055) 1px, transparent 1.2px);
  background-size: 4px 4px;
  mix-blend-mode: multiply;
}
:root[data-theme="dark"] .grain {
  background-image: radial-gradient(rgba(242,235,221,.05) 1px, transparent 1.2px);
  mix-blend-mode: screen;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hairline);
}
.header-inner { display: flex; align-items: center; gap: 22px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-icon { border-radius: 7px; }
.brand-text { font-family: var(--font-display); font-size: 19px; letter-spacing: .04em; }
.nav { display: flex; align-items: center; gap: 26px; margin-left: auto; }
.nav > a { font-size: 15px; color: var(--ink-2); transition: color .2s; position: relative; }
.nav > a:hover { color: var(--ink); }
.nav-cta {
  color: var(--ink) !important;
  border: 1.5px solid var(--accent);
  padding: 7px 18px; border-radius: 999px;
  transition: background .2s, color .2s;
}
.nav-cta:hover { background: var(--accent); color: #fff !important; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-switch {
  display: flex; border: 1px solid var(--hairline); border-radius: 999px; overflow: hidden;
}
.lang-btn {
  background: transparent; border: 0; color: var(--ink-2);
  font-size: 12.5px; padding: 5px 11px; transition: .2s;
}
.lang-btn[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-strong); font-weight: 600; }
.theme-toggle {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid var(--hairline); background: transparent; color: var(--ink-2);
  display: grid; place-items: center; transition: .2s;
}
.theme-toggle:hover { color: var(--accent-strong); border-color: var(--accent); }
.theme-toggle svg { width: 17px; height: 17px; }
:root[data-theme="light"] .icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: none; }
.nav-toggle { display: none; background: none; border: 0; width: 36px; height: 36px; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-toggle span { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }

/* ============ Hero ============ */
.hero { padding: 84px 0 72px; overflow: hidden; }
.hero-inner {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center;
}
.badge {
  display: inline-block; font-size: 13px; letter-spacing: .06em;
  color: var(--accent-strong); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero-title {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(40px, 5.6vw, 66px); line-height: 1.22; letter-spacing: .02em;
}
.hero-title em { font-style: normal; color: var(--accent-strong); position: relative; }
.hero-title em::after {
  content: ""; position: absolute; left: 2%; right: 2%; bottom: 6px; height: 10px;
  background: linear-gradient(90deg, var(--accent-soft), transparent);
  z-index: -1; border-radius: 6px;
}
.hero-slogan {
  margin-top: 14px;
  font-family: var(--font-latin);
  font-size: clamp(14px, 1.35vw, 16px);
  letter-spacing: .14em;
  color: var(--accent-strong);
}
.hero-sub { margin-top: 22px; font-size: 17.5px; color: var(--ink-2); max-width: 33em; }
.hero-cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px; font-size: 15.5px; font-weight: 500;
  transition: transform .2s var(--ease), box-shadow .2s, background .2s;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-soft); }
.btn-primary:hover { transform: translateY(-2px); background: var(--accent-strong); }
.btn-ghost { border: 1.5px solid var(--hairline); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); }
.hero-trust { margin-top: 26px; font-size: 13px; color: var(--ink-2); letter-spacing: .03em; }

/* Hero 舞台 */
.hero-stage { position: relative; display: grid; place-items: center; }
.phone {
  position: relative;
  border-radius: 44px;
  border: 9px solid #1B1B1D;
  background: #000;
  box-shadow: var(--shadow), inset 0 0 0 1.5px rgba(255,255,255,.08);
  overflow: hidden;
}
/* 截图自带真实状态栏与灵动岛，这里不再叠加 CSS 假岛 */
.phone img { width: 100%; height: 100%; object-fit: cover; }
.phone-hero { width: min(330px, 78vw); aspect-ratio: 9 / 19.2; }

.float-chip {
  position: absolute; z-index: 4;
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-elevated); border: 1px solid var(--hairline);
  border-radius: 999px; padding: 9px 16px;
  font-size: 13.5px; font-weight: 500; box-shadow: var(--shadow-soft);
  animation: chip-float 5.2s ease-in-out infinite;
}
.chip-sync { left: max(2%, 8px); top: 16%; }
.chip-ai { right: max(0%, 2px); bottom: 18%; animation-delay: -2.6s; }
.chip-sync .chk {
  width: 16px; height: 16px; border-radius: 50%; background: var(--jade);
  position: relative; flex: none;
}
.chip-sync .chk::after {
  content: ""; position: absolute; left: 4.5px; top: 3.5px;
  width: 5px; height: 8px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.chip-ai svg { width: 17px; height: 17px; color: var(--amber); }
@keyframes chip-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}
@media (prefers-reduced-motion: reduce) {
  .float-chip { animation: none; }
  html { scroll-behavior: auto; }
}

/* ============ 通用段落 ============ */
.section { padding: 92px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: .34em; text-indent: .34em;
  color: var(--accent-strong); margin-bottom: 14px; font-weight: 500;
}
.eyebrow-gold { color: #D8B573; }
.section-title {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(30px, 3.8vw, 42px); line-height: 1.3; letter-spacing: .02em;
}
.section-desc { margin-top: 16px; color: var(--ink-2); font-size: 16.5px; }

/* 滚动显现 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.shot-mode .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ============ 真实画面 ============ */
.screens { background: var(--bg-soft); }
.screen-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px;
}
.screen-card { text-align: center; }
.phone-sm {
  width: 100%; max-width: 218px; margin: 0 auto;
  aspect-ratio: 9 / 19.2; border-radius: 30px; border-width: 6px;
  transition: transform .35s var(--ease), box-shadow .35s;
}
.screen-card:hover .phone-sm { transform: translateY(-8px); box-shadow: var(--shadow); }
.screen-card figcaption { margin-top: 18px; }
.screen-card strong {
  display: block; font-family: var(--font-display); font-weight: 400;
  font-size: 19px; letter-spacing: .06em;
}
.screen-card span { display: block; margin-top: 5px; font-size: 13.5px; color: var(--ink-2); }

/* ============ 痛点 / 能力 ============ */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.slab {
  background: var(--bg-elevated); border: 1px solid var(--hairline);
  border-radius: var(--radius-lg); padding: 30px 28px;
  transition: transform .3s var(--ease), box-shadow .3s;
}
.slab:hover { transform: translateY(-5px); box-shadow: var(--shadow-soft); }
.slab h3 { font-size: 18.5px; font-weight: 600; margin: 18px 0 8px; letter-spacing: .02em; }
.slab p { font-size: 14.5px; color: var(--ink-2); }
.mono-tile {
  width: 46px; height: 46px; border-radius: 13px;
  display: grid; place-items: center; color: #fff;
}
.mono-tile svg { width: 24px; height: 24px; }
.hue-celadon { background: var(--celadon); }
.hue-jade { background: var(--jade); }
.hue-robe { background: var(--robe); }
.hue-terra { background: var(--terra); }
.hue-amber { background: var(--amber); }
.hue-umber { background: var(--umber); }

/* 高亮卡（疑问 × AI 回答） */
.feature-hl {
  border: 1.5px solid color-mix(in srgb, var(--amber) 55%, transparent);
  background:
    linear-gradient(160deg, color-mix(in srgb, var(--amber) 9%, var(--bg-elevated)), var(--bg-elevated) 55%);
}

/* ============ 导出分享 ============ */
.export { background: var(--bg-soft); }
.export-inner {
  display: grid; grid-template-columns: 1.02fr .98fr; gap: 56px; align-items: center;
}
.export-list { margin-top: 24px; list-style: none; }
.export-list li {
  padding: 9px 0 9px 30px; position: relative; font-size: 15.5px; color: var(--ink);
  border-bottom: 1px dashed var(--hairline);
}
.export-list li::before {
  content: ""; position: absolute; left: 4px; top: 16px;
  width: 14px; height: 8px; border: solid var(--accent); border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
}
.export-visual img {
  border-radius: var(--radius-md); box-shadow: var(--shadow);
  border: 1px solid var(--hairline);
}

/* ============ 循环（夜航段） ============ */
.loop { padding: 0; }
.loop-night {
  background:
    radial-gradient(1200px 500px at 70% -10%, rgba(216, 181, 115, .08), transparent 60%),
    var(--night-bg);
  color: var(--night-ink);
  padding: 96px 0 100px;
  position: relative; overflow: hidden;
}
.night-spiral {
  position: absolute; right: -180px; top: 50%; transform: translateY(-50%);
  width: 720px; height: 720px; color: #D8B573; pointer-events: none;
}
.loop .section-desc { color: rgba(242, 235, 221, .72); }
.loop-row {
  display: flex; align-items: stretch; gap: 18px; justify-content: center;
}
.loop-step {
  flex: 1; max-width: 300px;
  border: 1px solid rgba(216, 181, 115, .25); border-radius: var(--radius-lg);
  padding: 30px 26px; position: relative;
  background: rgba(255, 255, 255, .025);
}
.weave-tick {
  position: absolute; top: 0; left: 26px; width: 44px; height: 5px;
  border-radius: 0 0 6px 6px;
  background: repeating-linear-gradient(90deg, #D8B573 0 6px, #4FBFB6 6px 12px, #E87A50 12px 18px);
}
.loop-num { font-family: var(--font-latin); font-size: 14px; color: #D8B573; letter-spacing: .2em; }
.loop-step h3 { font-family: var(--font-display); font-weight: 400; font-size: 22px; margin: 10px 0 8px; }
.loop-step p { font-size: 14px; color: rgba(242, 235, 221, .72); }
.loop-arrow { align-self: center; flex: none; }

/* ============ 信条 ============ */
.principle-card {
  background: var(--bg-elevated); border: 1px solid var(--hairline);
  border-radius: var(--radius-md); padding: 26px 24px 24px; position: relative;
  transition: transform .3s var(--ease), box-shadow .3s;
}
.principle-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.principle-card::before {
  content: ""; position: absolute; left: 24px; top: 0; width: 3px; height: 34px; border-radius: 0 0 3px 3px;
}
.spine-clay::before { background: var(--accent); }
.spine-celadon::before { background: var(--celadon); }
.spine-robe::before { background: var(--robe); }
.spine-amber::before { background: var(--amber); }
.principle-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.principle-card p { font-size: 14px; color: var(--ink-2); }

/* ============ 获取 ============ */
.get { padding-top: 20px; }
.get-panel {
  background:
    radial-gradient(700px 300px at 12% 0%, var(--accent-soft), transparent 60%),
    var(--bg-elevated);
  border: 1px solid var(--hairline); border-radius: calc(var(--radius-lg) + 6px);
  padding: 58px 56px;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center;
  box-shadow: var(--shadow-soft);
}
.dl-card { text-align: center; }
.dl-badges {
  display: flex; gap: 18px; justify-content: center; flex-wrap: wrap;
}
.dl-badge { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.dl-platform {
  font-size: 12.5px; letter-spacing: .18em; text-indent: .18em;
  color: var(--ink-2); font-weight: 500;
}
.btn-appstore {
  display: inline-flex; align-items: center; gap: 12px;
  background: #111; color: #fff; border-radius: 14px;
  padding: 12px 24px; border: 1px solid #2c2c2e;
  transition: transform .2s var(--ease), box-shadow .2s;
}
.btn-appstore:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -14px rgba(0,0,0,.5); }
.as-logo { width: 26px; height: 26px; }
.as-text { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.25; }
.as-text small { font-size: 11px; opacity: .8; }
.as-text strong { font-size: 19px; font-weight: 600; letter-spacing: .01em; }
.dl-note { margin-top: 18px; font-size: 13.5px; color: var(--ink-2); }
.dl-req { margin-top: 6px; font-size: 12.5px; color: var(--ink-2); opacity: .85; }

/* ============ FAQ ============ */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--hairline); }
.faq-q {
  width: 100%; background: none; border: 0; color: inherit;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
  padding: 22px 4px; font-size: 16.5px; font-weight: 500; text-align: left;
}
.faq-plus { position: relative; width: 18px; height: 18px; flex: none; }
.faq-plus::before, .faq-plus::after {
  content: ""; position: absolute; background: var(--accent-strong); border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s;
}
.faq-plus::before { left: 8px; top: 2px; width: 2px; height: 14px; }
.faq-plus::after { left: 2px; top: 8px; width: 14px; height: 2px; }
.faq-item.open .faq-plus::before { transform: scaleY(0); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height .4s var(--ease);
}
.faq-a p { padding: 0 4px 24px; color: var(--ink-2); font-size: 15px; }

/* ============ 页脚 ============ */
.site-footer { border-top: 1px solid var(--hairline); background: var(--bg-soft); }
.weave-strip {
  height: 6px;
  background: var(--weave);
  opacity: .8;
}
.footer-inner {
  display: grid; grid-template-columns: 1.2fr 2fr; gap: 44px; padding: 54px 24px 40px;
}
.footer-tag { margin-top: 14px; font-size: 13.5px; color: var(--ink-2); }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h4 {
  font-size: 13px; letter-spacing: .2em; color: var(--accent-strong);
  margin-bottom: 14px; font-weight: 600;
}
.footer-col a { display: block; font-size: 14px; color: var(--ink-2); padding: 5px 0; transition: color .2s; }
.footer-col a:hover { color: var(--ink); }
.footer-bottom { border-top: 1px solid var(--hairline); padding: 20px 24px 30px; }
.footer-bottom p { font-size: 12.5px; color: var(--ink-2); text-align: center; }

/* ============ 响应式 ============ */
@media (max-width: 1020px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-stage { order: -1; }
  .phone-hero { width: min(300px, 66vw); }
  .screen-row { grid-template-columns: repeat(2, 1fr); gap: 34px 22px; }
  .export-inner { grid-template-columns: 1fr; gap: 40px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .get-panel { grid-template-columns: 1fr; padding: 44px 34px; text-align: center; }
  .footer-inner { grid-template-columns: 1fr; gap: 34px; }
}
@media (max-width: 720px) {
  .section { padding: 68px 0; }
  .hero { padding: 56px 0 60px; }
  .nav {
    position: fixed; inset: 64px 0 auto 0; z-index: 49;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--hairline);
    padding: 10px 24px 18px; display: none;
  }
  .nav.open { display: flex; }
  .nav > a { padding: 12px 0; font-size: 16px; border-bottom: 1px solid var(--hairline); }
  .nav > a:last-child { border-bottom: 0; margin-top: 8px; text-align: center; }
  .header-actions { margin-left: auto; }
  .nav-toggle { display: flex; margin-left: 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .screen-row { grid-template-columns: 1fr; }
  .screen-card .phone-sm { max-width: 240px; }
  .loop-row { flex-direction: column; align-items: center; }
  .loop-arrow { transform: rotate(90deg); }
  .chip-sync { left: 2%; top: 8%; }
  .chip-ai { right: 2%; bottom: 10%; }
  .get-panel { padding: 38px 22px; }
}