/* ============ MiSans 字体（免费商用 · 本地自托管） ============ */
@font-face {
  font-family: "MiSans";
  src: url("fonts/MiSans-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "MiSans";
  src: url("fonts/MiSans-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "MiSans";
  src: url("fonts/MiSans-Demibold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ============ 设计变量 ============ */
:root {
  --bg: #F7F4EF;          /* 暖米白 */
  --bg-2: #EFEAE2;        /* 燕麦 */
  --ink: #2B2622;         /* 深炭 */
  --ink-soft: #6B6259;
  --amber: #C9A227;       /* 琥珀金 */
  --amber-soft: #E8C977;
  --night: #1C1917;       /* 暖黑 */
  --night-2: #242019;
  --line: rgba(43,38,34,.14);
  --line-dark: rgba(247,244,239,.16);
  --serif: "MiSans","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif; /* 柔和的类苹果字体 */
  --sans: "MiSans",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --ease: cubic-bezier(.22,.61,.36,1);
  --nav-h: 64px;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display:block; max-width:100%; }
a { color:inherit; text-decoration:none; }
::selection { background: var(--amber); color:#fff; }

/* ============ 通用排版 ============ */
.eyebrow {
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--amber);
  font-weight: 600;
  margin-bottom: 18px;
}
h1,h2,h3 { font-family: var(--serif); font-weight: 600; line-height: 1.25; letter-spacing: .01em; }
h2 { font-size: clamp(1.9rem, 4vw, 3.1rem); }
h3 { font-size: clamp(1.35rem, 2.4vw, 1.9rem); }
.lead { color: var(--ink-soft); font-size: clamp(1rem, 1.4vw, 1.15rem); max-width: 34em; }

.dark { background: var(--night); color: var(--bg); }
.dark .lead, .dark .eyebrow { color: var(--amber-soft); }
.dark .eyebrow { color: var(--amber); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  font-size: 15px; letter-spacing: .06em;
  padding: 15px 30px; border-radius: 999px;
  border: 1px solid transparent;
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), background .45s var(--ease), color .45s var(--ease);
  cursor: pointer;
}
.btn .en { opacity:.72; font-size: 12px; letter-spacing:.14em; }
.btn-primary { background: var(--amber); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px -12px rgba(201,162,39,.55); }
.btn-ghost { border-color: rgba(247,244,239,.4); color: var(--bg); background: rgba(28,25,23,.25); backdrop-filter: blur(6px); }
.btn-ghost:hover { border-color: var(--bg); transform: translateY(-2px); }

/* ============ 导航 ============ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  transition: background .5s var(--ease), box-shadow .5s var(--ease);
}
.nav.scrolled { background: rgba(247,244,239,.88); backdrop-filter: blur(14px); box-shadow: 0 1px 0 var(--line); }
.nav-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 28px;
  height: 100%; display: flex; align-items: center; gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--bg); }
.nav.scrolled .brand { color: var(--ink); }
.brand-mark { display:block; }
.brand-name { font-family: var(--serif); font-size: 17px; letter-spacing: .12em; }
.brand-name em { font-style: normal; font-size: 10px; opacity:.55; margin-left: 2px; letter-spacing:.08em; }
.nav-links { margin-left: auto; display: flex; gap: 26px; }
.nav-links a {
  font-size: 14px; letter-spacing: .1em; color: var(--bg); opacity: .85;
  transition: opacity .3s, color .3s;
  position: relative;
}
.nav.scrolled .nav-links a { color: var(--ink); }
.nav-links a:hover { opacity: 1; }
.nav-links a::after {
  content:""; position:absolute; left:0; bottom:-5px; height:1px; width:100%;
  background: var(--amber); transform: scaleX(0); transform-origin: left;
  transition: transform .4s var(--ease);
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-cta {
  font-size: 13px; letter-spacing: .1em;
  border: 1px solid rgba(247,244,239,.45); color: var(--bg);
  padding: 9px 18px; border-radius: 999px; transition: all .4s var(--ease);
}
.nav.scrolled .nav-cta { border-color: rgba(43,38,34,.35); color: var(--ink); }
.nav-cta:hover { background: var(--amber); border-color: var(--amber); color:#fff; }

/* ============ Hero ============ */
.hero { position: relative; min-height: 100vh; display: flex; flex-direction: column; justify-content: center; overflow: hidden; color: var(--bg); }
.hero-bg { position:absolute; inset:0; }
.hero-bg img, .hero-bg video { width:100%; height:100%; object-fit: cover; object-position: center 42%; display:block; }
@keyframes kenburns { 0% { transform: scale(1.08) translateY(0); } 100% { transform: scale(1.16) translateY(-1.6%); } }
.hero-bg img { animation: kenburns 28s ease-in-out infinite alternate; }
.hero-veil { position:absolute; inset:0; background: linear-gradient(180deg, rgba(28,20,12,.52) 0%, rgba(28,20,12,.22) 42%, rgba(20,14,9,.78) 100%), radial-gradient(120% 90% at 50% 26%, rgba(232,185,74,.22) 0%, transparent 58%); }
.hero-glow {
  position:absolute; left: 68%; top: 46%; width: 46vmin; height: 46vmin; border-radius: 50%;
  background: radial-gradient(circle, rgba(232,185,74,.5) 0%, rgba(232,185,74,0) 65%);
  filter: blur(6px); transform: translate(-50%,-50%);
  animation: glowPulse 5s ease-in-out infinite;
  pointer-events: none;
}
@keyframes glowPulse { 0%,100% { opacity:.55; transform: translate(-50%,-50%) scale(.96);} 50% { opacity:.9; transform: translate(-50%,-50%) scale(1.05);} }
.hero-content { position: relative; z-index: 2; max-width: 1100px; margin: 0 auto; padding: 130px 28px 46px; width: 100%; text-align: center; display: flex; flex-direction: column; align-items: center; }
.hero-eyebrow { color: var(--amber-soft); }
.hero-title { font-size: clamp(2.7rem, 7vw, 6rem); line-height: 1.12; letter-spacing: .01em; margin: 8px 0 30px; }
.hero-title .line { display: block; overflow: hidden; }
.hero-sub { font-size: clamp(1.02rem, 1.6vw, 1.28rem); color: rgba(247,244,239,.85); margin-bottom: 38px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.hero-trust {
  position: relative; z-index: 2; width: 100%;
  display: flex; flex-wrap: wrap; gap: 10px 34px; justify-content: center;
  padding: 22px 28px; font-size: 12.5px; letter-spacing: .12em;
  color: rgba(247,244,239,.66);
  border-top: 1px solid rgba(247,244,239,.14);
}
.hero-trust span::before { content:"◆"; color: var(--amber); margin-right: 8px; font-size: 9px; vertical-align: 1px; }

/* ============ 夜晚三段式 ============ */
.cinema { padding: 120px 28px 40px; }
.cinema-head { text-align:center; max-width: 640px; margin: 0 auto 90px; }
.cinema-head .lead { margin: 18px auto 0; }
.scene {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(40px, 7vw, 110px);
  align-items: center; max-width: 1240px; margin: 0 auto 130px;
}
.scene-flip .scene-media { order: 2; }
.scene-media { overflow: hidden; border-radius: 20px; box-shadow: 0 30px 70px -30px rgba(28,25,23,.35); }
.scene-media img { width:100%; height: clamp(320px, 52vw, 560px); object-fit: cover; transition: transform 1.2s var(--ease); }
.scene:hover .scene-media img { transform: scale(1.04); }
.scene-no { font-family: var(--serif); font-size: 15px; letter-spacing:.18em; color: var(--amber); margin-bottom: 20px; }
.scene-no span { color: var(--ink-soft); }
.scene-body h3 { margin-bottom: 20px; }
.scene-body p { color: var(--ink-soft); max-width: 30em; }

/* ============ 干预闭环 ============ */
.loop { padding: 130px 28px; overflow: hidden; }
.loop-inner { max-width: 1080px; margin: 0 auto; }
.loop-head { text-align:center; max-width: 640px; margin: 0 auto 70px; }
.loop-head .lead { margin: 18px auto 0; }
.loop-stage { position: relative; }
.radar-wrap { display:flex; flex-direction:column; align-items:center; margin: 0 auto 54px; }
.radar { position: relative; width: 200px; aspect-ratio: 1; border-radius: 50%; background: rgba(232,185,74,.05); border: 1px solid rgba(232,185,74,.22); }
.radar-label { margin-top: 18px; font-size: 12.5px; letter-spacing: .22em; color: rgba(247,244,239,.55); }
.radar-ring { position:absolute; inset:0; border-radius:50%; border:1px solid rgba(232,185,74,.16); }
.radar-ring.r2 { inset: 18%; } .radar-ring.r3 { inset: 36%; }
.radar-sweep {
  position:absolute; inset:0; border-radius:50%; overflow:hidden;
  background: conic-gradient(from 0deg, rgba(232,185,74,.34) 0deg, transparent 48deg);
  animation: sweep 4.5s linear infinite;
}
@keyframes sweep { to { transform: rotate(360deg); } }
.radar-dot { position:absolute; width:7px; height:7px; border-radius:50%; background: var(--amber-soft); box-shadow: 0 0 10px var(--amber); }
.radar-dot.d1 { top: 30%; left: 58%; animation: blink 2.4s ease-in-out infinite; }
.radar-dot.d2 { top: 62%; left: 32%; animation: blink 2.4s ease-in-out 1.2s infinite; }
@keyframes blink { 0%,100% { opacity:.35; } 50% { opacity:1; } }
.loop-grid { max-width: 920px; margin: 0 auto; display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.loop-card { background: rgba(247,244,239,.045); border: 1px solid rgba(247,244,239,.12); border-radius: 18px; padding: 28px 30px 32px; transition: transform .5s var(--ease), border-color .5s var(--ease), background .5s var(--ease); }
.loop-card:hover { transform: translateY(-4px); border-color: rgba(232,185,74,.5); background: rgba(247,244,239,.07); }
.loop-card .step-no { display:block; font-family: var(--serif); color: var(--amber); font-size: 13px; letter-spacing:.16em; margin-bottom: 12px; }
.loop-card h4 { font-family: var(--serif); font-size: 1.35rem; font-weight: 600; margin-bottom: 8px; }
.loop-card p { color: rgba(247,244,239,.62); font-size: 14.5px; line-height: 1.85; }
.loop-note { text-align:center; margin-top: 56px; color: rgba(247,244,239,.5); font-size: 13px; letter-spacing: .16em; }

/* ============ 灯塔设计 ============ */
.design { padding: 130px 28px; background: var(--bg-2); }
.design-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px,7vw,110px); align-items: center; }
.design-art { display:flex; justify-content:center; }
.lighthouse { width: min(360px, 76vw); height: auto; filter: drop-shadow(0 30px 50px rgba(28,25,23,.3)); }
.beacon { transform-origin: 110px 104px; animation: beaconSwing 7s ease-in-out infinite; }
@keyframes beaconSwing { 0%,100% { transform: rotate(-7deg); } 50% { transform: rotate(7deg); } }
.design-body .lead { margin: 18px 0 34px; }
.design-list { list-style:none; display:grid; grid-template-columns: 1fr 1fr; gap: 0 36px; }
.design-list li { padding: 16px 0; border-top: 1px solid var(--line); }
.design-list span { display:block; font-family: var(--serif); font-size: 15.5px; font-weight: 600; margin-bottom: 3px; }
.design-list p { font-size: 13.5px; color: var(--ink-soft); }

/* ============ 三感 ============ */
.senses { padding: 130px 28px; }
.senses-head { text-align:center; margin-bottom: 70px; }
.senses-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.sense { border-radius: 18px; overflow: hidden; background: #fff; box-shadow: 0 20px 50px -30px rgba(28,25,23,.3); transition: transform .6s var(--ease); }
.sense:hover { transform: translateY(-6px); }
.sense-img { overflow: hidden; }
.sense-img img { width:100%; height: 280px; object-fit: cover; transition: transform 1.1s var(--ease); }
.sense:hover .sense-img img { transform: scale(1.06); }
.sense figcaption { padding: 26px 26px 30px; }
.sense h3 { font-family: var(--serif); font-size: 1.5rem; margin-bottom: 10px; }
.sense p { color: var(--ink-soft); font-size: 14.5px; }

/* ============ 适合谁 ============ */
.who { padding: 130px 28px; background: var(--bg-2); }
.who-head { text-align:center; margin-bottom: 70px; }
.who-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.who-card { border-radius: 18px; overflow: hidden; background: #fff; box-shadow: 0 20px 50px -30px rgba(28,25,23,.3); transition: transform .6s var(--ease); }
.who-card:hover { transform: translateY(-6px); }
.who-card img { width:100%; height: 200px; object-fit: cover; }
.who-card div { padding: 22px 22px 26px; }
.who-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
.who-card p { color: var(--ink-soft); font-size: 14px; }

/* ============ 科学 ============ */
.science { padding: 130px 28px; }
.science-inner { max-width: 820px; margin: 0 auto; text-align: center; }
.science-inner h2 { margin-bottom: 40px; }
.science-list { list-style:none; display:flex; flex-wrap:wrap; gap: 14px; justify-content:center; margin-bottom: 60px; }
.science-list li {
  border: 1px solid var(--line-dark); border-radius: 999px;
  padding: 10px 22px; font-size: 14px; letter-spacing: .1em;
  color: rgba(247,244,239,.85);
}
.quote { font-family: var(--serif); font-size: clamp(1.2rem, 2vw, 1.6rem); line-height: 1.6; max-width: 30em; margin: 0 auto; }
.quote span { display:block; font-family: var(--sans); font-size: 13px; color: rgba(247,244,239,.5); margin-top: 14px; letter-spacing: .1em; }

/* ============ Coming Soon ============ */
.coming { padding: 140px 28px; }
.coming-inner { max-width: 760px; margin: 0 auto; text-align:center; }
.coming-inner h2 { margin-bottom: 20px; }
.coming-inner .lead { margin: 0 auto 40px; }
.notify-form { display:flex; gap: 12px; max-width: 520px; margin: 0 auto 14px; }
.notify-form input {
  flex:1; min-width: 0; padding: 15px 22px; border-radius: 999px;
  border: 1px solid var(--line); background: #fff; font-size: 15px; color: var(--ink);
  outline: none; transition: border-color .3s, box-shadow .3s;
}
.notify-form input:focus { border-color: var(--amber); box-shadow: 0 0 0 3px rgba(201,162,39,.16); }
.form-note { color: var(--amber); font-size: 14px; letter-spacing: .05em; }
.faq { margin: 70px auto 0; max-width: 720px; text-align: left; }
.faq-item { border-top: 1px solid var(--line); padding: 6px 0; }
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-item summary {
  cursor: pointer; list-style: none; padding: 20px 4px;
  font-family: var(--serif); font-size: 16.5px; font-weight: 600;
  display: flex; justify-content: space-between; align-items: center;
  transition: color .3s;
}
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary::after { content:"+"; font-size: 20px; color: var(--amber); transition: transform .35s var(--ease); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item[open] summary { color: var(--amber); }
.faq-item p { color: var(--ink-soft); font-size: 14.5px; padding: 0 4px 22px; max-width: 56em; }

/* ============ 品牌故事 ============ */
.story { padding: 130px 28px; background: var(--bg-2); }
.story-inner { max-width: 760px; margin: 0 auto; }
.story-inner .lead { margin: 20px 0 24px; }
.story-placeholder { font-size: 12.5px; color: var(--ink-soft); opacity:.7; letter-spacing:.08em; }

/* ============ 页脚 ============ */
.footer { background: var(--night); color: rgba(247,244,239,.7); padding: 70px 28px 46px; }
.footer-inner { max-width: 1180px; margin: 0 auto; }
.footer-brand { display:flex; align-items:center; gap: 8px; font-family: var(--serif); font-size: 15px; letter-spacing:.1em; color: var(--bg); margin-bottom: 22px; }
.footer-brand em { font-style:normal; font-size: 11px; opacity:.5; }
.footer-links { display:flex; gap: 22px; flex-wrap: wrap; margin-bottom: 26px; }
.footer-links a { font-size: 13.5px; letter-spacing:.1em; opacity:.75; transition: opacity .3s, color .3s; }
.footer-links a:hover { opacity:1; color: var(--amber-soft); }
.footer-meta { font-size: 12px; color: rgba(247,244,239,.4); letter-spacing:.05em; line-height:1.9; }

/* ============ 滚动显现（JS 启用时生效） ============ */
html.js .reveal { opacity: 0; }
html.js .reveal.in-view { opacity: 1; }
.reveal { transition: opacity 1s var(--ease); }

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  .scene { grid-template-columns: 1fr; gap: 34px; margin-bottom: 90px; }
  .scene-flip .scene-media { order: 0; }
  .scene-media img { height: 64vw; max-height: 480px; }
  .loop-stage { grid-template-columns: 1fr; gap: 40px; }
  .radar { margin: 0 auto; }
  .design-grid { grid-template-columns: 1fr; gap: 60px; }
  .senses-grid { grid-template-columns: 1fr; max-width: 560px; }
  .who-grid { grid-template-columns: repeat(2, 1fr); }
  .design-list { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 640px) {
  .loop-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: clamp(2.2rem, 9vw, 3rem); }
  .br-desk { display: none; }
  .who-grid { grid-template-columns: 1fr; }
  .notify-form { flex-direction: column; }
  .hero-trust { justify-content: flex-start; }
  .cinema { padding-top: 90px; }
  .coming { padding: 100px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* ============ 占位图角标（上线前标记，定稿后移除） ============ */
.img-badge-wrap { position: relative; display: block; line-height: 0; }
.img-badge-wrap > img { display: block; }
.img-badge {
  position: absolute; left: 10px; bottom: 10px; z-index: 3;
  padding: 4px 12px; border-radius: 999px;
  background: rgba(20,14,9,.45); color: #fff;
  font-size: 11px; letter-spacing: .18em; line-height: 1.5;
  backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
  pointer-events: none; user-select: none;
}
.img-badge--hero { left: 18px; top: calc(var(--nav-h) + 16px); bottom: auto; }

/* ============ 第7屏 App 界面展示 ============ */
.app-showcase { max-width: 1180px; margin: 110px auto 0; padding: 0 28px; text-align: center; }
.app-showcase h3 { margin: 14px 0 0; }
.app-shots { display: flex; gap: 30px; justify-content: center; align-items: stretch; flex-wrap: wrap; margin-top: 46px; }
.app-shot { width: 250px; }
.app-shot img { width: 100%; height: 340px; object-fit: cover; object-position: center top; border-radius: 22px; border: 1px solid rgba(255,255,255,.14); box-shadow: 0 34px 70px -34px rgba(0,0,0,.6); display: block; }
.app-shot figcaption { margin-top: 14px; font-size: 12.5px; letter-spacing: .16em; color: rgba(247,244,239,.7); }
@media (max-width: 640px) { .app-shot { width: 190px; } .app-shot img { height: 258px; } }