:root {
  --ink: #0b0c0e;
  --ink-2: #16181c;
  --paper: #f4f1ea;
  --cloud: #eef0f2;
  --gold: #f1c27d;
  --gold-2: #c98a3d;
  --cyan: #8ad8ff;
  --text-dim: rgba(255, 255, 255, .68);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
body {
  background: var(--ink);
  color: #fff;
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.is-loading { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ol { list-style: none; }

/* ---------- loader ---------- */
.loader {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  background: #050506;
  transition: opacity 1s var(--ease), visibility 1s;
}
.loader.is-done { opacity: 0; visibility: hidden; }
.loader__inner { width: min(320px, 70vw); }
.loader__logo { width: 180px; margin: 0 auto 28px; opacity: .9; animation: breathe 2.4s ease-in-out infinite; }
.loader__bar { height: 1px; background: rgba(255,255,255,.12); overflow: hidden; }
.loader__bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--gold), var(--cyan)); transition: width .3s; }
.loader__meta { display: flex; justify-content: space-between; margin-top: 12px; font: 11px/1 var(--mono); letter-spacing: .2em; color: rgba(255,255,255,.45); }
@keyframes breathe { 50% { opacity: .45; transform: scale(.96); } }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  display: flex; align-items: center; gap: 32px;
  padding: 22px clamp(20px, 4vw, 56px);
  transition: background .5s, color .5s, padding .5s, backdrop-filter .5s;
}
.nav__brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: .08em; font-size: 15px; }
.nav__brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav__links { display: flex; gap: 30px; margin-left: auto; font-size: 14px; }
.nav__links a { opacity: .78; position: relative; transition: opacity .3s; }
.nav__links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1px; background: currentColor; transition: right .4s var(--ease); }
.nav__links a:hover { opacity: 1; }
.nav__links a:hover::after { right: 0; }
.nav__cta {
  font-size: 13px; padding: 9px 18px; border-radius: 99px;
  border: 1px solid rgba(255,255,255,.35); backdrop-filter: blur(10px);
  transition: background .3s, color .3s, border-color .3s;
}
.nav__cta:hover { background: #fff; color: #111; }
.nav.is-solid { padding-top: 14px; padding-bottom: 14px; background: rgba(10,10,12,.55); backdrop-filter: blur(16px) saturate(1.4); }
.nav.is-light { color: #1b1c1f; }
.nav.is-light.is-solid { background: rgba(246,246,244,.7); }
.nav.is-light .nav__cta { border-color: rgba(0,0,0,.2); }
.nav.is-light .nav__cta:hover { background: #111; color: #fff; }

/* ---------- hero ---------- */
.hero { position: relative; height: 100vh; height: 100svh; }
html.lenis-stopped { overflow: hidden; }
.hero.is-locked { touch-action: none; }
.hero__sticky { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden; background: #000; }
.hero__media { position: absolute; inset: 0; transform-origin: 50% 55%; }
.hero__video, .hero__still { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__video { opacity: 0; }
.hero__video.is-on { opacity: 1; }
.hero__still { opacity: 0; transition: opacity .45s ease; }
.hero__still.is-on { opacity: 1; }
.hero__veil { position: absolute; inset: 0; background: #000; opacity: 0; pointer-events: none; }
.hero__shade {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0,0,0,.62) 0%, rgba(0,0,0,.15) 38%, rgba(0,0,0,0) 60%, rgba(0,0,0,.45) 100%),
    linear-gradient(0deg, rgba(0,0,0,.55) 0%, rgba(0,0,0,0) 28%),
    linear-gradient(180deg, rgba(0,0,0,.45) 0%, rgba(0,0,0,0) 18%);
}
.hero__grain {
  position: absolute; inset: -50%; pointer-events: none; opacity: .07; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1s steps(6) infinite;
}
@keyframes grain { 0%{transform:translate(0,0)} 25%{transform:translate(-3%,2%)} 50%{transform:translate(2%,-3%)} 75%{transform:translate(-2%,-1%)} 100%{transform:translate(1%,3%)} }
.hero__fog {
  position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(120% 90% at 50% 60%, #f7f8f9 30%, #eceef0 100%);
}

.chap {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 clamp(24px, 7vw, 120px);
  opacity: 0; visibility: hidden; pointer-events: none;
}
.chap__left { max-width: 46vw; }
.chap__idx { display: flex; align-items: center; gap: 14px; font: 12px/1 var(--mono); letter-spacing: .3em; color: var(--text-dim); margin-bottom: 26px; }
.chap__idx i { width: 40px; height: 1px; background: currentColor; }
.chap__idx--c { justify-content: center; }
.chap__title {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(42px, 6.4vw, 104px); line-height: 1.12; letter-spacing: .04em;
  text-shadow: 0 6px 40px rgba(0,0,0,.45);
}
.chap__title .ch { display: inline-block; }
.chap__en { display: none !important; }
/* 首屏标题下方不保留任何英文版本副标题，兼容旧缓存 DOM。 */
.chap--1 .chap__left > :not(.chap__idx):not(.chap__title) { display: none !important; }
.chap__right {
  width: min(380px, 32vw); font-size: 14px; line-height: 2; color: rgba(255,255,255,.86);
  padding: 26px 28px; border-radius: 4px; border-left: 1px solid rgba(241,194,125,.6);
  background: linear-gradient(90deg, rgba(8,8,10,.55), rgba(8,8,10,.25));
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.chap__right p + p { margin-top: 14px; }
.chap__kicker { font: 12px/1 var(--mono); letter-spacing: .25em; color: var(--gold); margin-bottom: 18px; }
.chap__steps li {
  display: grid; grid-template-columns: 34px 64px 1fr; align-items: baseline;
  padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,.14);
  font-size: 17px; font-family: var(--serif);
}
.chap__steps b { font: 11px var(--mono); color: var(--gold); letter-spacing: .1em; }
.chap__steps span { font-family: var(--sans); font-size: 13px; color: rgba(255,255,255,.6); }
.chap__stats { display: grid; grid-template-columns: 1fr 1fr; gap: 34px 28px; width: min(420px, 36vw); }
.chap__stats div { border-top: 1px solid rgba(255,255,255,.22); padding-top: 16px; }
.chap__stats b { display: block; font-family: var(--serif); font-size: clamp(30px, 3.2vw, 46px); font-weight: 600; background: linear-gradient(180deg, #fff, var(--gold)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.chap__stats span { font-size: 13px; color: rgba(255,255,255,.62); letter-spacing: .1em; }
.chap--4 { flex-direction: column; justify-content: center; text-align: center; color: #1b1c1f; }
.chap--4 .chap__idx { color: rgba(0,0,0,.45); }
.chap__title--c { text-shadow: none; }
.chap__sub { margin-top: 22px; font-size: 16px; letter-spacing: .4em; color: rgba(0,0,0,.55); }

.hero__foot {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 26px clamp(24px, 4vw, 56px);
  font-size: 13px; color: rgba(255,255,255,.75);
}
.hero__dl { padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.4); }
.hero__dots { display: flex; gap: 10px; }
.hero__dots button { width: 28px; height: 3px; border: 0; border-radius: 2px; background: rgba(255,255,255,.28); cursor: pointer; transition: width .5s var(--ease), background .5s; }
.hero__dots button.is-on { width: 56px; background: linear-gradient(90deg, var(--gold), #fff); }
.hero.is-light .hero__foot { color: rgba(0,0,0,.6); }
.hero.is-light .hero__dl { border-color: rgba(0,0,0,.3); }
.hero.is-light .hero__dots button { background: rgba(0,0,0,.18); }
.hero.is-light .hero__dots button.is-on { background: linear-gradient(90deg, var(--gold-2), #333); }
.hero__hint { letter-spacing: .2em; animation: hint 2s ease-in-out infinite; }
@keyframes hint { 50% { opacity: .35; } }

/* ---------- section heads ---------- */
.sec-head { text-align: center; max-width: 720px; margin: 0 auto; padding: 0 24px; }
.sec-head__eyebrow { font: 12px/1 var(--mono); letter-spacing: .35em; color: var(--gold-2); margin-bottom: 18px; }
.sec-head h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(32px, 4.4vw, 60px); letter-spacing: .04em; line-height: 1.2; }
.sec-head > p:last-child { margin-top: 18px; font-size: 15px; line-height: 1.9; opacity: .66; }
.sec-head--light { color: #1b1c1f; }

/* ---------- styles / cloud ring ---------- */
.styles {
  position: relative; height: 320vh; color: #1b1c1f;
  background: linear-gradient(180deg, #eceef0 0%, #e9ebee 60%, #f3f2ee 100%);
}
.styles::before {
  content: ""; position: absolute; inset: 0;
  background: url(img/k4.jpg) center/cover; opacity: .22; filter: blur(18px) saturate(.6) brightness(1.25);
}
.clouds { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.clouds i {
  position: absolute; width: 140vw; height: 60vh; left: -20vw; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255,255,255,.95), rgba(255,255,255,0));
  filter: blur(30px); animation: drift 38s linear infinite alternate;
}
.clouds i:nth-child(1) { top: 10%; }
.clouds i:nth-child(2) { top: 45%; animation-duration: 52s; animation-direction: alternate-reverse; opacity: .8; }
.clouds i:nth-child(3) { top: 75%; animation-duration: 44s; opacity: .7; }
@keyframes drift { to { transform: translateX(18vw); } }
.styles__sticky {
  position: sticky; top: 0; height: 100vh; height: 100svh;
  display: flex; flex-direction: column; justify-content: center; gap: 2vh; overflow: hidden;
  padding-top: 70px;
}
.ring-stage { position: relative; height: min(56vh, 520px); perspective: 1400px; perspective-origin: 50% 45%; cursor: grab; touch-action: pan-y; }
.ring-stage:active { cursor: grabbing; }
.ring { position: absolute; left: 50%; top: 50%; width: 0; height: 0; transform-style: preserve-3d; }
.ring__card {
  position: absolute; left: calc(var(--w) / -2); top: calc(var(--h) / -2);
  width: var(--w); height: var(--h);
  --w: min(26vh, 230px); --h: calc(var(--w) * 1.62);
  border-radius: 14px; overflow: hidden; background: #fff;
  box-shadow: 0 30px 60px -20px rgba(40,50,70,.35), 0 0 0 1px rgba(255,255,255,.6) inset;
}
.ring__card img { width: 100%; height: 100%; object-fit: cover; pointer-events: none; user-select: none; }
.ring__card figcaption { display: none; }
.styles__caption { text-align: center; font-family: var(--serif); font-size: 22px; letter-spacing: .1em; }
.styles__caption small { display: block; margin-top: 10px; font: 11px var(--mono); letter-spacing: .3em; opacity: .45; }

/* ---------- showcase (9.0 screenshots) ---------- */
.showcase { position: relative; overflow: hidden; background: #f3f2ee; color: #1b1c1f; padding: 18vh clamp(20px, 5vw, 80px) 22vh; }
.sc-stage { position: relative; max-width: 1180px; margin: 70px auto 0; perspective: 1800px; }
.sc-main { position: relative; z-index: 2; width: 74%; margin: 0 auto; transform-style: preserve-3d; }
.sc-win {
  position: relative; overflow: hidden; border-radius: 14px; background: #fff;
  box-shadow: 0 80px 140px -50px rgba(30,40,60,.5), 0 0 0 1px rgba(0,0,0,.06);
}
.sc-bar { display: flex; align-items: center; gap: 7px; height: 32px; padding: 0 14px; background: #f6f6f7; border-bottom: 1px solid rgba(0,0,0,.06); font-size: 12px; color: rgba(0,0,0,.45); }
.sc-bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.sc-bar i:nth-child(2) { background: #febc2e; }
.sc-bar i:nth-child(3) { background: #28c840; }
.sc-bar span { margin-left: 10px; }
.sc-win img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.sc-shine { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(115deg, transparent 35%, rgba(255,255,255,.55) 50%, transparent 65%); transform: translateX(-120%); }
.sc-float { position: absolute; z-index: 3; width: 30%; }
.sc-float > div { border-radius: 12px; overflow: hidden; background: #fff; box-shadow: 0 40px 70px -25px rgba(30,40,60,.45), 0 0 0 1px rgba(0,0,0,.05); animation: bob 7s ease-in-out infinite; }
.sc-float img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.sc-float figcaption { position: absolute; left: 12px; bottom: 12px; padding: 5px 11px; border-radius: 99px; font-size: 12px; color: #fff; background: rgba(20,20,24,.72); backdrop-filter: blur(6px); }
.sc-f1 { left: -3%; top: -6%; }
.sc-f2 { left: -6%; bottom: -10%; } .sc-f2 > div { animation-delay: -2s; }
.sc-f3 { right: -4%; top: 4%; } .sc-f3 > div { animation-delay: -4s; }
.sc-f4 { right: -2%; bottom: -14%; } .sc-f4 > div { animation-delay: -1s; }
@keyframes bob { 50% { transform: translateY(-14px); } }

/* ---------- orchestration (9.0 agent mode) ---------- */
.orch {
  position: relative; overflow: hidden; color: #fff;
  padding: 20vh clamp(20px, 5vw, 80px) 16vh;
  background: linear-gradient(180deg, #f3f2ee 0%, #0b0c0e 7%, #0b0c0e 100%);
}
.orch__glow { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(45% 40% at 45% 58%, rgba(241,194,125,.16), transparent 70%), radial-gradient(30% 30% at 85% 40%, rgba(138,216,255,.08), transparent 70%); }
.orch-stage {
  position: relative; display: grid; grid-template-columns: .95fr .9fr 1.1fr 1.05fr; align-items: center; gap: 2vw;
  max-width: 1280px; min-height: 620px; margin: 70px auto 0;
}
.orch-ghost {
  position: absolute; left: 50%; top: 50%; width: 88%; transform: translate(-50%, -50%) perspective(1600px) rotateX(18deg);
  border-radius: 16px; opacity: .14; filter: blur(5px) grayscale(.3); pointer-events: none;
  -webkit-mask-image: radial-gradient(70% 70% at 50% 50%, #000 40%, transparent);
          mask-image: radial-gradient(70% 70% at 50% 50%, #000 40%, transparent);
}
.orch-lines { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.orch-lines path { fill: none; stroke: rgba(241,194,125,.22); stroke-width: 1.4; }
.orch-lines circle { fill: #ffe2b0; filter: drop-shadow(0 0 6px #f1c27d); }
.orch-col { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; }
.orch-col--agents { gap: 18px; align-items: flex-start; }
.orch-req {
  width: 100%; max-width: 260px; padding: 20px 22px; border-radius: 18px;
  background: linear-gradient(160deg, rgba(255,255,255,.1), rgba(255,255,255,.03)); border: 1px solid rgba(255,255,255,.14); backdrop-filter: blur(12px);
}
.orch-tag { display: flex; align-items: center; gap: 8px; font-size: 12px; letter-spacing: .2em; color: rgba(255,255,255,.5); }
.orch-tag i { width: 6px; height: 6px; border-radius: 50%; background: #3ddc84; box-shadow: 0 0 10px #3ddc84; }
.orch-req__text { margin-top: 12px; font-family: var(--serif); font-size: 18px; line-height: 1.6; transition: opacity .5s; }
.orch-core { position: relative; width: 190px; height: 190px; border-radius: 50%; display: grid; place-content: center; justify-items: center; gap: 10px; text-align: center;
  background: radial-gradient(circle at 50% 40%, rgba(241,194,125,.28), rgba(20,18,14,.9) 70%); border: 1px solid rgba(241,194,125,.45);
  box-shadow: 0 0 80px rgba(241,194,125,.25), inset 0 0 40px rgba(241,194,125,.15);
  animation: corePulse 3.2s ease-in-out infinite;
}
@keyframes corePulse { 50% { box-shadow: 0 0 120px rgba(241,194,125,.42), inset 0 0 50px rgba(241,194,125,.25); } }
.orch-core img { width: 54px; border-radius: 14px; }
.orch-core p { font-family: var(--serif); font-size: 17px; letter-spacing: .06em; }
.orch-core small { display: block; margin-top: 2px; font: 11px var(--sans); letter-spacing: .3em; color: var(--gold); }
.orch-ring { position: absolute; inset: -18px; border-radius: 50%; border: 1px dashed rgba(241,194,125,.35); animation: spin 18s linear infinite; }
.orch-ring--2 { inset: -40px; border-style: solid; border-color: rgba(241,194,125,.1); border-top-color: rgba(241,194,125,.55); animation-duration: 6s; }
@keyframes spin { to { transform: rotate(360deg); } }
.orch-agent {
  padding: 11px 18px; border-radius: 99px; font-size: 14px; letter-spacing: .04em;
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(10px);
  color: rgba(255,255,255,.62); filter: blur(.6px); transition: all .6s var(--ease);
}
.orch-agent.is-hot { color: #fff; filter: none; border-color: rgba(241,194,125,.6); background: rgba(241,194,125,.12); box-shadow: 0 0 24px rgba(241,194,125,.25); }
.orch-agent:nth-child(2), .orch-agent:nth-child(4) { margin-left: 22px; }
.orch-agent:nth-child(3) { margin-left: 36px; }
.orch-agent { white-space: nowrap; }
.orch-done { margin-top: 16px; font-size: 12px; letter-spacing: .3em; color: var(--gold); }

.pl-device {
  position: relative; width: min(320px, 100%); padding: 30px 10px 12px; border-radius: 44px;
  background: linear-gradient(145deg, #2a2c31, #0f1013); box-shadow: 0 0 0 1px rgba(255,255,255,.12) inset, 0 50px 100px -30px rgba(0,0,0,.9), 0 0 80px -20px rgba(241,194,125,.35);
}
.pl-screen { position: relative; width: 100%; aspect-ratio: 9 / 16; border-radius: 30px; overflow: hidden; background: #000; }
.pl-screen video { display: block; width: 100%; height: 100%; object-fit: contain; }
.pl-island { position: absolute; top: 10px; left: 50%; width: 70px; height: 12px; margin-left: -35px; border-radius: 10px; background: #000; }
.pl-overlay { position: absolute; left: 12px; right: 12px; top: 12px; display: flex; justify-content: space-between; align-items: center; }
.pl-style { font-size: 12px; padding: 6px 12px; border-radius: 99px; background: rgba(0,0,0,.55); backdrop-filter: blur(6px); }
.pl-sound { width: 32px; height: 32px; border: 0; border-radius: 50%; cursor: pointer; background: rgba(0,0,0,.55); font-size: 14px; }

.pl-metrics { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); max-width: 1280px; margin: 80px auto 0; border-top: 1px solid rgba(255,255,255,.1); }
.pl-metrics div { padding: 30px 10px 0; text-align: center; }
.pl-metrics div + div { border-left: 1px solid rgba(255,255,255,.08); }
.pl-metrics b { display: block; font-family: var(--serif); font-size: clamp(40px, 4.4vw, 64px); font-weight: 600; line-height: 1; background: linear-gradient(180deg, #fff, var(--gold)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.pl-metrics span { display: block; margin-top: 12px; font-size: 13px; letter-spacing: .15em; color: rgba(255,255,255,.55); }

/* ---------- download ---------- */
.download { position: relative; overflow: hidden; padding: 18vh clamp(20px, 5vw, 80px); background: #07080a; }
.download__bg { position: absolute; inset: 0; background: url(img/k1.jpg) center 40%/cover; opacity: .28; filter: blur(2px); }
.download__bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, #0b0c0e 0%, rgba(7,8,10,.4) 25%, rgba(7,8,10,.6) 70%, #07080a 100%); }
.sec-head--dark { position: relative; }
.dl-grid { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1180px; margin: 64px auto 0; }
.dl-card {
  position: relative; display: flex; flex-direction: column; padding: 34px 30px; border-radius: 22px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(18px);
  transition: transform .6s var(--ease), border-color .4s, background .4s; overflow: hidden;
}
.dl-card::before { content: ""; position: absolute; inset: -1px; background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 0%), rgba(241,194,125,.22), transparent 50%); opacity: 0; transition: opacity .4s; pointer-events: none; }
.dl-card:hover::before { opacity: 1; }
.dl-card:hover { transform: translateY(-8px); border-color: rgba(241,194,125,.45); }
.dl-card__icon { width: 40px; height: 40px; margin-bottom: 26px; color: #fff; }
.dl-card h3 { font-family: var(--serif); font-size: 28px; margin-bottom: 8px; }
/* 9.0 内测期间的版本标注：不改变卡片布局，仅作内联小标签 */
.dl-card__tag { margin-left: 10px; font-family: var(--sans); font-size: 12px; font-style: normal; font-weight: 500; vertical-align: middle; padding: 3px 10px; border-radius: 99px; color: var(--gold); border: 1px solid rgba(241,194,125,.4); background: rgba(241,194,125,.08); }
.dl-card > p { font-size: 14px; color: rgba(255,255,255,.6); line-height: 1.8; }
.dl-card__btn {
  margin: 30px 0 18px; display: inline-flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-radius: 12px; background: linear-gradient(135deg, var(--gold), var(--gold-2)); color: #1a1206; font-weight: 600; font-size: 15px;
}
.dl-card__btn i { font-style: normal; }
.dl-card small { margin-top: auto; font-size: 12px; line-height: 1.8; color: rgba(255,255,255,.45); }
.dl-card small .ext { color: var(--gold); text-decoration: underline; cursor: pointer; }
.dl-card code { font: 11px var(--mono); padding: 2px 6px; border-radius: 4px; background: rgba(255,255,255,.1); color: #fff; cursor: copy; }
.dl-card--mini { align-items: center; text-align: center; }
.phone {
  width: 190px; padding: 30px 16px 18px; margin-bottom: 22px; border-radius: 30px; background: #fff; color: #1b1c1f;
  box-shadow: 0 0 0 6px #1d1f24, 0 30px 60px -10px rgba(0,0,0,.6); position: relative;
}
.phone__notch { position: absolute; top: 8px; left: 50%; width: 56px; height: 14px; margin-left: -28px; border-radius: 10px; background: #1d1f24; }
.phone__t { font-size: 12px; color: rgba(0,0,0,.5); margin-bottom: 10px; }
.phone img { width: 100%; border-radius: 8px; }
.phone__s { font-size: 12px; font-weight: 600; margin-top: 10px; }

/* ---------- contact / ink ---------- */
.contact { position: relative; overflow: hidden; color: #1b1c1f; background: #f1efe9; padding-top: 14vh; }
.contact__bg { position: absolute; inset: 0; background: url(img/ink.jpg) center bottom/cover no-repeat; }
.contact__mist { position: absolute; inset: 0; background: linear-gradient(180deg, #07080a 0%, rgba(7,8,10,.85) 8%, rgba(241,239,233,0) 30%); pointer-events: none; }
.contact__inner { position: relative; display: flex; flex-direction: column; align-items: center; padding: 6vh 20px 10vh; }
.contact__eyebrow { display: flex; align-items: center; gap: 16px; font-family: var(--serif); font-size: 18px; letter-spacing: .4em; color: rgba(0,0,0,.6); }
.contact__eyebrow i { width: 60px; height: 1px; background: currentColor; opacity: .5; }
.contact__title { width: min(720px, 86vw); mix-blend-mode: multiply; margin: 10px 0 12px; clip-path: inset(0 100% 0 0); }
.scroll { width: min(820px, 92vw); filter: drop-shadow(0 30px 40px rgba(60,50,30,.25)); }
.scroll__rod { will-change: transform; height: 18px; margin: 0 -22px; border-radius: 9px; background: linear-gradient(180deg, #6b3d1f, #3a1f0e 60%, #2a160a); position: relative; z-index: 2; }
.scroll__rod::before, .scroll__rod::after { content: ""; position: absolute; top: -3px; width: 22px; height: 24px; border-radius: 6px; background: linear-gradient(180deg, #c99a52, #7a5426); }
.scroll__rod::before { left: -6px; } .scroll__rod::after { right: -6px; }
.scroll__paper {
  position: relative; z-index: 1;
  background: #fbf8f1 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.6' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 .55 0 0 0 0 .45 0 0 0 0 .3 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)'/%3E%3C/svg%3E");
  border-left: 1px solid #e6dcc6; border-right: 1px solid #e6dcc6;
}
.scroll__grid { display: grid; grid-template-columns: 1fr 200px; gap: 40px; padding: 44px 52px; align-items: center; }
.scroll__info h3 { font-family: var(--serif); font-size: 26px; letter-spacing: .06em; }
.scroll__lead { margin: 12px 0 22px; font-size: 14px; line-height: 1.9; color: rgba(0,0,0,.6); }
.scroll__info dl > div { display: grid; grid-template-columns: 84px 1fr; padding: 10px 0; border-top: 1px dashed rgba(120,90,50,.25); font-size: 14px; line-height: 1.7; }
.scroll__info dt { color: #a2783f; font-family: var(--serif); }
.scroll__info dd a { border-bottom: 1px solid rgba(0,0,0,.2); }
.scroll__qr { text-align: center; }
.scroll__qr img { width: 100%; padding: 10px; background: #fff; border: 1px solid #e6dcc6; border-radius: 6px; }
.scroll__qr p { margin-top: 12px; font-family: var(--serif); font-size: 14px; color: rgba(0,0,0,.6); letter-spacing: .1em; }
.footer {
  position: relative; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 26px clamp(20px, 5vw, 80px); font-size: 12px; color: rgba(0,0,0,.5);
  border-top: 1px solid rgba(0,0,0,.08); background: rgba(241,239,233,.75); backdrop-filter: blur(6px);
}
.footer p { display: flex; gap: 18px; flex-wrap: wrap; }
.footer a:hover { color: #000; }

/* ---------- misc ---------- */
.reveal { opacity: 0; transform: translateY(40px); }
.toast {
  position: fixed; left: 50%; bottom: 40px; z-index: 90; transform: translate(-50%, 20px);
  padding: 10px 20px; border-radius: 99px; background: #111; color: #fff; font-size: 13px;
  opacity: 0; transition: .4s var(--ease); pointer-events: none;
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .nav__links { display: none; }
  .nav__cta { margin-left: auto; }
  .chap { flex-direction: column; justify-content: center; align-items: flex-start; gap: 36px; padding-top: 40px; }
  .chap__left, .chap__right, .chap__stats { max-width: none; width: 100%; }
  .chap__right { font-size: 13px; }
  .chap--4 { align-items: center; justify-content: flex-start; padding-top: 17vh; }
  .hero__hint { display: none; }
  .dl-grid { grid-template-columns: 1fr; max-width: 460px; }
  .pl-metrics { grid-template-columns: 1fr 1fr; row-gap: 30px; }
  .sc-main { width: 100%; }
  .sc-float { width: 42%; }
  .sc-f1 { left: -4%; top: -22%; } .sc-f2 { left: -4%; bottom: -26%; }
  .sc-f3 { right: -4%; top: -18%; } .sc-f4 { right: -4%; bottom: -30%; }
  .sc-float figcaption { font-size: 10px; left: 6px; bottom: 6px; padding: 3px 8px; }
  .showcase { padding-bottom: 26vh; }
  .orch-stage { grid-template-columns: 1fr; gap: 34px; min-height: 0; max-width: 460px; }
  .orch-lines, .orch-ghost { display: none; }
  .orch-col--agents { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 10px; }
  .orch-agent, .orch-agent:nth-child(n) { margin-left: 0; font-size: 13px; padding: 9px 14px; }
  .orch-col + .orch-col::before { content: ""; position: absolute; top: -30px; left: 50%; width: 1px; height: 24px; background: linear-gradient(var(--gold), transparent); }
  .pl-metrics div:nth-child(3) { border-left: 0; }
  .scroll__grid { grid-template-columns: 1fr; padding: 32px 26px; }
  .scroll__qr { width: 180px; margin: 0 auto; }
  .scroll { width: 84vw; }
}
@media (max-width: 560px) {
  .chap__steps li { font-size: 15px; padding: 8px 0; }
  .footer { flex-direction: column; }
  .chap__en { display: none; }
  .ring__card { --w: 38vw; }
  .sec-head h2 { font-size: 27px; }
  .contact__eyebrow { font-size: 14px; letter-spacing: .2em; gap: 10px; }
  .contact__eyebrow i { width: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .hero__grain, .clouds i, .hero__hint { animation: none; }
}
.showcase .sec-head, .orch .sec-head { max-width: 980px; }
/* 9.0 风格库标题 12 字，720px 上限会折出两字孤行；放宽并启用均衡断行 */
.styles .sec-head { max-width: 980px; }
.styles .sec-head h2 { text-wrap: balance; }