/* ══════════════════════════════════════════════════
   逐川 AI 创作室 · 落地页
   配色沿用产品内「深夜创作室」设计令牌
   ══════════════════════════════════════════════════ */

:root{
  --night:#080b14;
  --night-2:#0a1020;
  --surface:#101725;
  --surface-2:#141d2e;
  --line:#1e2a40;
  --line-2:#2a3852;
  --text:#e8eef9;
  --muted:#98a5be;
  --dim:#6b7893;
  --cyan:#46e6e1;
  --violet:#a58bff;
  --warm:#f0c77d;
  --ok:#8ed7ac;

  --max:1240px;
  --r:16px;
  --r-lg:22px;

  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","Cascadia Mono","SF Mono",Consolas,monospace;

  --ease:cubic-bezier(.16,1,.3,1);
  --gutter:clamp(20px,5vw,48px);
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  scroll-padding-top:88px;
}

body{
  margin:0;
  background:var(--night);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  line-break:strict;
  overflow-x:hidden;
}

img,svg{display:block;max-width:100%}
h1,h2,h3,h4,p,figure,dl,dd,ol,ul{margin:0}
ol,ul{padding:0;list-style:none}
b,strong{font-weight:650;color:var(--text)}
em{font-style:normal}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img{width:100%;height:100%;object-fit:cover}

:is(a,button,summary,input,textarea):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

::selection{background:rgba(70,230,225,.24);color:#fff}

.wrap{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.skip{
  position:fixed;
  top:-80px;left:24px;
  z-index:99;
  padding:10px 18px;
  background:var(--cyan);
  color:var(--night);
  font-size:14px;
  font-weight:600;
  border-radius:0 0 10px 10px;
  transition:top .2s;
}
.skip:focus{top:0}

/* ── 通用排版 ─────────────────────────────────── */

.kicker{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--muted);
  text-transform:uppercase;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  gap:9px;
}
.kicker::before{
  content:"";
  width:22px;height:1px;
  background:currentColor;
  opacity:.5;
}
.kicker:has(.live-dot)::before,
.kicker:has(.dev-dot)::before{display:none}
.kicker:has(.live-dot),
.kicker:has(.dev-dot){color:var(--text)}

.live-dot,.dev-dot{
  width:6px;height:6px;
  border-radius:50%;
  flex-shrink:0;
}
.live-dot{background:var(--ok);box-shadow:0 0 0 3px rgba(142,215,172,.16)}
.dev-dot{background:var(--warm);box-shadow:0 0 0 3px rgba(240,199,125,.14)}

h2{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:600;
}
h2 em{color:var(--cyan);white-space:nowrap}

.lede{
  font-size:clamp(15px,1.15vw,17px);
  line-height:1.85;
  color:var(--muted);
  max-width:58ch;
  margin-top:22px;
}

.section{
  padding-block:clamp(72px,9vw,120px);
  position:relative;
}
.section + .section{border-top:1px solid rgba(30,42,64,.5)}

.sec-head{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:clamp(24px,5vw,80px);
  align-items:end;
  margin-bottom:clamp(36px,4.6vw,60px);
}
.sec-sub{
  font-size:15px;
  line-height:1.85;
  color:var(--muted);
  max-width:44ch;
  padding-bottom:4px;
}

/* ── 按钮 ─────────────────────────────────────── */

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  min-height:48px;
  border-radius:999px;
  font-size:15px;
  font-weight:550;
  border:1px solid transparent;
  transition:background .2s,color .2s,border-color .2s,transform .18s var(--ease);
  will-change:transform;
}
.btn svg{width:16px;height:16px;flex-shrink:0}
.btn:active{transform:scale(.98)}

.btn-primary{
  background:var(--cyan);
  color:#04121a;
  font-weight:650;
  box-shadow:0 1px 0 rgba(255,255,255,.35) inset,0 10px 30px -14px rgba(70,230,225,.7);
}
.btn-primary:hover{background:#63f0eb}

.btn-ghost{
  border-color:var(--line-2);
  color:var(--text);
  background:rgba(16,23,37,.6);
}
.btn-ghost:hover{border-color:var(--muted);background:rgba(20,29,46,.9)}

.btn-sm{padding:9px 18px;min-height:40px;font-size:14px}
.btn-lg{padding:16px 32px;min-height:56px;font-size:16px}

/* ── 导航 ─────────────────────────────────────── */

.nav{
  position:fixed;
  inset:0 0 auto;
  z-index:50;
  transition:background .3s,border-color .3s,backdrop-filter .3s;
  border-bottom:1px solid transparent;
}
.nav.is-scrolled{
  background:rgba(8,11,20,.82);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}

.nav-inner{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding:16px var(--gutter);
  display:flex;
  align-items:center;
  gap:clamp(16px,4vw,48px);
}
.nav.is-scrolled .nav-inner{padding-block:12px}

.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:22px;height:22px;color:var(--cyan)}
.brand-text{
  font-size:15px;
  font-weight:650;
  display:flex;
  align-items:baseline;
  gap:7px;
}
.brand-text em{
  font-size:12px;
  font-weight:450;
  color:var(--dim);
  letter-spacing:.06em;
}

.nav-links{
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,28px);
  margin-left:auto;
  font-size:14px;
  color:var(--muted);
}
.nav-links a{
  position:relative;
  padding-block:6px;
  transition:color .2s;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}

.nav-cta{flex-shrink:0}

/* ── 首屏 ─────────────────────────────────────── */

.hero{
  position:relative;
  padding-top:clamp(104px,13vw,150px);
  padding-bottom:clamp(52px,6vw,80px);
  overflow:hidden;
}

.hero-glow{
  position:absolute;
  top:-30%;right:-12%;
  width:min(860px,92vw);
  aspect-ratio:1;
  pointer-events:none;
  background:
    radial-gradient(circle at 50% 50%, rgba(70,230,225,.10), transparent 58%),
    radial-gradient(circle at 66% 42%, rgba(165,139,255,.09), transparent 52%);
  filter:blur(12px);
}

.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.04fr .96fr;
  gap:clamp(32px,5vw,68px);
  align-items:center;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:7px 15px;
  background:rgba(16,23,37,.6);
  margin-bottom:26px;
}
.dot-live{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(142,215,172,.16);
}

h1{
  font-size:clamp(36px,5vw,62px);
  line-height:1.12;
  letter-spacing:-.035em;
  font-weight:600;
}
h1 em{color:var(--cyan);font-weight:600}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:32px;
}

.hero-stats{
  display:grid;
  grid-template-columns:repeat(4,auto);
  gap:clamp(18px,3vw,36px);
  margin-top:42px;
  padding-top:24px;
  border-top:1px solid var(--line);
  justify-content:start;
}
.hero-stats dt{
  font-family:var(--mono);
  font-size:clamp(18px,1.9vw,23px);
  font-weight:500;
  color:var(--text);
  letter-spacing:-.01em;
  white-space:nowrap;
}
.hero-stats dd{
  font-size:12px;
  color:var(--dim);
  margin-top:2px;
}

/* ── 首屏样张 ─────────────────────────────────── */

.hero-poster{
  position:relative;
  margin:0;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line-2);
  aspect-ratio:4/5;
  background:#0b1120;
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset,0 44px 90px -52px #000;
}
.hero-poster img{object-position:center 58%}

.hp-text{
  position:absolute;
  inset:0 0 auto;
  padding:clamp(20px,3vw,34px);
  background:linear-gradient(180deg,rgba(4,8,14,.78),rgba(4,8,14,0) 82%);
  pointer-events:none;
}
.hp-tag{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.24em;
  color:var(--cyan);
  margin-bottom:10px;
}
.hp-title{
  font-size:clamp(21px,2.4vw,30px);
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.3;
}
.hp-desc{font-size:13px;color:var(--muted);margin-top:6px}
.hp-price{
  display:flex;
  align-items:baseline;
  gap:10px;
  margin-top:14px;
}
.hp-price b{
  font-family:var(--mono);
  font-size:clamp(20px,2.2vw,26px);
  color:var(--cyan);
  letter-spacing:-.02em;
}
.hp-price s{
  font-family:var(--mono);
  font-size:12.5px;
  color:var(--dim);
  text-decoration-thickness:1px;
}

.hp-bar{
  position:absolute;
  inset:auto 0 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px clamp(16px,2.4vw,22px);
  font-family:var(--mono);
  font-size:10.5px;
  color:var(--muted);
  background:rgba(6,10,18,.82);
  backdrop-filter:blur(10px);
  border-top:1px solid rgba(255,255,255,.07);
}
.hp-bar span:first-child{color:var(--text)}

/* ── 走马灯 ───────────────────────────────────── */

.marquee{
  border-block:1px solid var(--line);
  background:rgba(10,16,32,.6);
  overflow:hidden;
  padding-block:15px;
  mask-image:linear-gradient(90deg,transparent,#000 6%,#000 94%,transparent);
}
.marquee-track{
  display:flex;
  align-items:center;
  gap:clamp(22px,3vw,40px);
  width:max-content;
  animation:slide 42s linear infinite;
  animation-delay:-6s;
}
.marquee-track span{
  font-size:clamp(14px,1.5vw,18px);
  font-weight:550;
  color:var(--text);
  letter-spacing:.02em;
  white-space:nowrap;
  display:inline-flex;
  align-items:baseline;
  gap:8px;
}
.marquee-track span.m-dev{color:var(--dim);font-weight:450}
.marquee-track span.m-dev i{
  font-style:normal;
  font-family:var(--mono);
  font-size:9.5px;
  letter-spacing:.08em;
  color:var(--warm);
  border:1px solid rgba(240,199,125,.35);
  border-radius:4px;
  padding:1px 5px;
}
.marquee-track > i{
  font-style:normal;
  color:var(--cyan);
  opacity:.35;
  font-size:9px;
}
@keyframes slide{to{transform:translateX(-33.3333%)}}

/* ── 样张卡 ───────────────────────────────────── */

.out-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  align-items:start;
}

.out-card{
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--r);
  overflow:hidden;
  background:var(--surface);
  transition:border-color .35s var(--ease),transform .35s var(--ease);
}
.out-card:hover{border-color:var(--line-2);transform:translateY(-2px)}

.oc-media{aspect-ratio:3/2;overflow:hidden;background:#0b1120}
.oc-media.oc-tall{aspect-ratio:3/4}
.oc-media img{transition:transform .7s var(--ease)}
.out-card:hover .oc-media img{transform:scale(1.015)}

.oc-bar{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding:12px 15px;
  border-top:1px solid var(--line);
}
.oc-name{font-size:13.5px;font-weight:600}
.oc-meta{font-family:var(--mono);font-size:10.5px;color:var(--dim);text-align:right}

.modes{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  margin-top:clamp(24px,3vw,34px);
  border-top:1px solid var(--line);
}
.modes li{
  padding:20px clamp(12px,2vw,26px) 4px 0;
  border-right:1px solid var(--line);
}
.modes li:last-child{border-right:0}
.modes li:not(:first-child){padding-left:clamp(12px,2vw,26px)}
.modes b{display:block;font-size:14.5px;font-weight:600;margin-bottom:5px}
.modes span{font-size:13px;line-height:1.7;color:var(--muted);display:block}

/* ── 团购带货 ─────────────────────────────────── */

.tg-grid{
  display:grid;
  grid-template-columns:1.22fr .78fr;
  gap:clamp(16px,2.4vw,26px);
  align-items:start;
}

.tg-poster{
  position:relative;
  margin:0;
  border:1px solid var(--line-2);
  border-radius:var(--r);
  overflow:hidden;
  aspect-ratio:4/5;
  background:#0b1120;
  box-shadow:0 30px 70px -50px #000;
}
.tg-poster > img{object-position:center 40%}

.tg-overlay{
  position:absolute;
  inset:auto 0 0;
  padding:clamp(20px,3vw,32px);
  background:linear-gradient(0deg,rgba(4,7,13,.97) 10%,rgba(4,7,13,.88) 52%,rgba(4,7,13,.2) 82%,rgba(4,7,13,0));
}
.tg-shop{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.2em;
  color:rgba(232,238,249,.72);
  margin-bottom:10px;
}
.tg-set{
  font-size:clamp(21px,2.4vw,29px);
  font-weight:600;
  letter-spacing:-.01em;
  line-height:1.3;
}
.tg-items{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.tg-items li{
  font-size:11.5px;
  color:rgba(232,238,249,.86);
  border:1px solid rgba(232,238,249,.22);
  border-radius:999px;
  padding:3px 10px;
}
.tg-price{display:flex;align-items:baseline;gap:10px;margin-top:16px}
.tg-price b{
  font-family:var(--mono);
  font-size:clamp(24px,2.6vw,32px);
  color:var(--cyan);
  letter-spacing:-.03em;
}
.tg-price s{font-family:var(--mono);font-size:13px;color:rgba(232,238,249,.5)}
.tg-price em{
  font-size:11px;
  color:var(--night);
  background:var(--cyan);
  border-radius:4px;
  padding:2px 7px;
  font-weight:650;
}
.tg-valid{margin-top:10px;font-size:11.5px;color:rgba(232,238,249,.6)}

.tg-bar{
  position:absolute;
  inset:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:11px clamp(16px,2.4vw,22px);
  font-family:var(--mono);
  font-size:10.5px;
  color:var(--muted);
  background:rgba(6,10,18,.6);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.tg-bar span:first-child{color:var(--text)}

.tg-side{display:grid;gap:14px}

.tg-facts{
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:4px 16px;
  background:rgba(16,23,37,.55);
}
.tg-facts li{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:14px;
  padding:11px 0;
  border-bottom:1px solid var(--line);
  font-size:13px;
}
.tg-facts li:last-child{border-bottom:0}
.tg-facts span{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.1em;
  color:var(--dim);
  flex-shrink:0;
}
.tg-facts b{font-weight:550;text-align:right}

/* ── 工作流画布 ───────────────────────────────── */

.canvas{
  position:relative;
  aspect-ratio:16/8;
  min-height:340px;
  border:1px solid var(--line-2);
  border-radius:var(--r-lg);
  overflow:hidden;
  background-color:#0a1120;
  background-image:
    radial-gradient(rgba(70,230,225,.12) 1px,transparent 1px),
    linear-gradient(170deg,rgba(17,26,43,.75),rgba(9,14,24,.92));
  background-size:22px 22px,100% 100%;
  touch-action:none;
  user-select:none;
}

.cv-links{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  pointer-events:none;
  z-index:1;
}
.cv-links path{
  fill:none;
  stroke:rgba(70,230,225,.45);
  stroke-width:1.4;
}
.cv-links path.flow{
  stroke:rgba(70,230,225,.85);
  stroke-width:1.6;
  stroke-dasharray:5 9;
  stroke-linecap:round;
  animation:flow 1.5s linear infinite;
}
@keyframes flow{to{stroke-dashoffset:-28}}

.node{
  position:absolute;
  z-index:2;
  width:154px;
  padding:11px 13px 12px;
  border:1px solid var(--line-2);
  border-radius:12px;
  background:#101a2b;
  box-shadow:0 14px 34px -22px #000;
  cursor:grab;
  transition:border-color .22s,box-shadow .22s;
}
.node:hover{border-color:rgba(70,230,225,.42)}
.node.is-drag{
  cursor:grabbing;
  border-color:var(--cyan);
  box-shadow:0 20px 44px -20px rgba(0,0,0,.9),0 0 0 1px rgba(70,230,225,.3);
}

.node-head{
  display:flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  font-weight:600;
  color:var(--text);
}
.node-head svg{width:14px;height:14px;color:var(--cyan);flex-shrink:0}
.node-body{
  font-size:11.5px;
  color:var(--muted);
  margin-top:4px;
  padding-left:21px;
  line-height:1.5;
}

.node-step{
  position:absolute;
  top:-9px;left:11px;
  font-family:var(--mono);
  font-size:9.5px;
  line-height:1.5;
  color:var(--cyan);
  background:#0d1524;
  border:1px solid rgba(70,230,225,.32);
  border-radius:999px;
  padding:1px 6px;
}

.node-ghost{
  position:absolute;
  left:70%;top:62%;
  z-index:2;
  display:flex;
  align-items:center;
  gap:7px;
  padding:13px 16px;
  border:1px dashed rgba(70,230,225,.28);
  border-radius:12px;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.06em;
  color:rgba(152,165,190,.72);
  background:rgba(70,230,225,.02);
}
.node-ghost span{
  font-size:14px;
  color:rgba(70,230,225,.65);
  line-height:1;
}

.node-port{
  position:absolute;
  top:50%;
  width:8px;height:8px;
  margin-top:-4px;
  border-radius:50%;
  background:#0a1120;
  border:1.4px solid rgba(70,230,225,.7);
}
.port-in{left:-4px}
.port-out{right:-4px}

.cv-hint{
  position:absolute;
  left:18px;bottom:14px;
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--dim);
  z-index:3;
}
.cv-reset{
  position:absolute;
  right:14px;bottom:12px;
  z-index:3;
  font-size:11.5px;
  color:var(--muted);
  border:1px solid var(--line-2);
  border-radius:999px;
  padding:5px 13px;
  background:rgba(10,17,32,.8);
  transition:border-color .2s,color .2s;
}
.cv-reset:hover{border-color:var(--cyan);color:var(--cyan)}

.cv-note{
  margin-top:16px;
  font-size:12.5px;
  color:var(--dim);
  line-height:1.8;
}

/* ── 开发中 ───────────────────────────────────── */

.dev-list{border-top:1px solid var(--line)}
.dev-list li{
  display:grid;
  grid-template-columns:52px minmax(120px,180px) 1fr auto;
  gap:clamp(12px,2vw,28px);
  align-items:center;
  padding-block:clamp(18px,2.4vw,26px);
  border-bottom:1px solid var(--line);
}
.dev-no{
  font-family:var(--mono);
  font-size:11.5px;
  color:var(--dim);
  letter-spacing:.08em;
}
.dev-list h3{
  font-size:clamp(16px,1.5vw,18.5px);
  font-weight:600;
  letter-spacing:-.01em;
  color:var(--muted);
}
.dev-list p{
  font-size:13.5px;
  line-height:1.75;
  color:var(--dim);
  max-width:52ch;
}
.badge{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.08em;
  color:var(--warm);
  border:1px solid rgba(240,199,125,.34);
  border-radius:999px;
  padding:4px 11px;
  white-space:nowrap;
  background:rgba(240,199,125,.06);
}

/* ── 模型规格 ─────────────────────────────────── */

.spec{border-top:1px solid var(--line)}
.spec-row{
  display:grid;
  grid-template-columns:.85fr 1.15fr;
  gap:clamp(16px,4vw,56px);
  padding-block:clamp(20px,2.6vw,28px);
  border-bottom:1px solid var(--line);
  align-items:center;
}
.spec-name h3{
  font-size:15.5px;
  font-weight:600;
  letter-spacing:-.01em;
  margin-bottom:5px;
}
.spec-name p{font-size:13px;color:var(--muted);line-height:1.7}
.spec-cells{display:flex;flex-wrap:wrap;gap:8px 24px}
.sc{
  font-family:var(--mono);
  font-size:12px;
  color:var(--text);
  display:flex;
  align-items:baseline;
  gap:8px;
}
.sc b{
  font-family:var(--sans);
  font-size:10.5px;
  font-weight:500;
  color:var(--dim);
  letter-spacing:.06em;
  border:1px solid var(--line);
  border-radius:4px;
  padding:1px 6px;
}

.spec-note{margin-top:20px;font-size:12.5px;color:var(--dim);line-height:1.8}

/* ── 原则 ─────────────────────────────────────── */

.promises{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0 clamp(24px,4vw,56px);
  border-top:1px solid var(--line);
}
.promises li{
  padding-block:clamp(22px,2.8vw,30px);
  border-bottom:1px solid var(--line);
}
.p-no{
  font-family:var(--mono);
  font-size:11px;
  color:var(--cyan);
  letter-spacing:.1em;
  opacity:.8;
  display:block;
  margin-bottom:8px;
}
.promises h3{
  font-size:clamp(15.5px,1.4vw,17.5px);
  font-weight:600;
  line-height:1.5;
  letter-spacing:-.01em;
  margin-bottom:7px;
}
.promises p{font-size:13.5px;line-height:1.8;color:var(--muted)}

/* ── 数据边界 ─────────────────────────────────── */

.local-grid{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:clamp(30px,5vw,70px);
  align-items:center;
}

.lc-list{
  margin-top:clamp(24px,3vw,34px);
  display:grid;
  gap:18px;
}
.lc-list li{padding-left:18px;border-left:1px solid var(--line-2)}
.lc-list h3{font-size:15px;font-weight:600;margin-bottom:4px}
.lc-list p{font-size:13.5px;line-height:1.75;color:var(--muted);max-width:44ch}

.diagram{
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:linear-gradient(170deg,rgba(14,20,34,.8),rgba(9,14,24,.9));
  padding:14px;
}
.diagram svg{width:100%;height:auto}
.diagram svg text{font-family:var(--mono)}
.diagram figcaption{
  font-size:11.5px;
  color:var(--dim);
  text-align:center;
  padding:10px 0 2px;
}

/* ── FAQ ──────────────────────────────────────── */

.faq-grid{
  display:grid;
  grid-template-columns:.75fr 1.25fr;
  gap:clamp(28px,5vw,72px);
  align-items:start;
}
.faq-head h2{margin-bottom:18px}

.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{
  cursor:pointer;
  padding-block:18px;
  font-size:15px;
  font-weight:550;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  list-style:none;
  transition:color .2s;
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"＋";
  font-family:var(--mono);
  font-size:15px;
  color:var(--cyan);
  flex-shrink:0;
  transition:transform .28s var(--ease);
}
.faq-list details[open] summary{color:var(--cyan)}
.faq-list details[open] summary::after{transform:rotate(45deg)}
.faq-list summary:hover{color:var(--text)}
.faq-list details p{
  font-size:14px;
  line-height:1.85;
  color:var(--muted);
  max-width:56ch;
  padding:0 0 20px;
  animation:fadeIn .32s var(--ease);
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ── 获取 ─────────────────────────────────────── */

.get{padding-block:clamp(64px,8vw,108px)}
.get-panel{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line-2);
  border-radius:clamp(18px,2.4vw,28px);
  background:linear-gradient(165deg,#111b2d,#0a1120 70%);
  padding:clamp(34px,6vw,72px) clamp(24px,5vw,60px);
  display:grid;
  grid-template-columns:1.5fr .5fr;
  gap:clamp(26px,4vw,56px);
  align-items:start;
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset,0 40px 100px -60px #000;
}
.get-glow{
  position:absolute;
  top:-40%;right:-10%;
  width:min(600px,80%);
  aspect-ratio:1;
  pointer-events:none;
  background:radial-gradient(circle,rgba(70,230,225,.14),transparent 62%);
  filter:blur(10px);
}
.get-panel > :not(.get-glow){position:relative}

.get-panel h2{
  font-size:clamp(25px,3.7vw,44px);
  margin-bottom:16px;
  max-width:22ch;
}
.get-sub{font-size:15.5px;line-height:1.85;color:var(--muted);max-width:52ch}
.get-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.get-meta{margin-top:22px;font-family:var(--mono);font-size:11.5px;color:var(--dim)}

.get-side{
  background:rgba(70,230,225,.045);
  border:1px solid rgba(70,230,225,.16);
  border-radius:14px;
  padding:20px 22px;
  display:flex;
  flex-direction:column;
  gap:9px;
}
.gs-label{
  font-family:var(--mono);
  font-size:10.5px;
  letter-spacing:.14em;
  color:var(--dim);
  text-transform:uppercase;
}
.gs-id{
  font-family:var(--mono);
  font-size:clamp(16px,1.5vw,19px);
  color:var(--cyan);
  letter-spacing:.02em;
  line-height:1.5;
}
.gs-note{font-size:12.5px;line-height:1.8;color:var(--muted)}

/* ── 页脚 ─────────────────────────────────────── */

.foot{
  border-top:1px solid var(--line);
  padding-block:32px;
  background:rgba(8,11,20,.9);
}
.foot-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 24px;
  font-size:12px;
  color:var(--dim);
}
.foot-brand{
  display:flex;
  align-items:center;
  gap:9px;
  color:var(--muted);
  font-size:12.5px;
}
.foot-brand .brand-mark{width:17px;height:17px;color:var(--cyan);opacity:.8}
.foot-note{margin-left:auto}
.foot-top{
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:5px 13px;
  transition:border-color .2s,color .2s;
}
.foot-top:hover{border-color:var(--cyan);color:var(--cyan)}

/* ── 入场动画 ─────────────────────────────────── */

html.js .reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  transition-delay:var(--d,0s);
}
html.js .reveal.is-in{opacity:1;transform:none}

/* ══════════════════════════════════════════════════
   响应式
   ══════════════════════════════════════════════════ */

@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-poster{max-width:520px;aspect-ratio:5/6}
  .sec-head{grid-template-columns:1fr;align-items:start;gap:16px}
  .sec-sub{max-width:56ch}
  .out-grid,.tg-grid,.local-grid,.faq-grid{grid-template-columns:1fr;gap:16px}
  .diagram{max-width:560px}
  .promises{grid-template-columns:1fr}
  .spec-row{grid-template-columns:1fr;gap:12px;align-items:start}
  .dev-list li{grid-template-columns:44px minmax(110px,150px) 1fr auto}
  .modes{grid-template-columns:1fr}
  .modes li{
    border-right:0;
    border-bottom:1px solid var(--line);
    padding:14px 0;
  }
  .modes li:last-child{border-bottom:0}
}

@media (max-width:820px){
  html{scroll-padding-top:76px}
  .nav-links{display:none}
  .nav-cta{margin-left:auto}

  .hero-stats{grid-template-columns:repeat(2,auto);gap:18px 30px}
  .get-panel{grid-template-columns:1fr;gap:24px}
  .get-side{padding:18px 20px}

  /* 画布在窄屏退化为纵向流程条 */
  .canvas{
    aspect-ratio:auto;
    min-height:0;
    padding:18px 16px 20px;
    display:grid;
    gap:22px;
    background-image:linear-gradient(170deg,rgba(17,26,43,.75),rgba(9,14,24,.92));
  }
  .cv-links,.node-port,.cv-hint,.cv-reset{display:none}
  .node{
    position:relative !important;
    width:auto;
    cursor:default;
  }
  .node-body{padding-left:0}
  .node + .node::before{
    content:"↓";
    position:absolute;
    left:50%;
    top:-17px;
    transform:translateX(-50%);
    font-size:12px;
    color:rgba(70,230,225,.6);
    line-height:1;
  }

  .dev-list li{
    grid-template-columns:36px 1fr auto;
    row-gap:6px;
    align-items:start;
  }
  .dev-list h3{grid-column:2}
  .dev-list p{grid-column:2 / -1;font-size:13px}
  .badge{grid-row:1;grid-column:3;justify-self:end}
  .foot-note{margin-left:0;flex-basis:100%}
}

@media (max-width:560px){
  body{font-size:15px}
  .hero-actions .btn{flex:1 1 100%;justify-content:center}
  .get-actions .btn{flex:1 1 100%;justify-content:center}
  .marquee{padding-block:12px}
  .oc-bar{flex-direction:column;align-items:flex-start;gap:3px}
  .oc-meta{text-align:left}
  .tg-items li{font-size:11px}
  .promises p,.dev-list p{font-size:13px}
}

/* ── 减少动效 ─────────────────────────────────── */

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  html.js .reveal{opacity:1 !important;transform:none !important}
  .marquee-track{animation:none}
  .cv-links path.flow{animation:none}
}

@media print{
  .nav,.marquee,.get-glow,.hero-glow,.canvas{display:none}
  body{background:#fff;color:#111}
  html.js .reveal{opacity:1;transform:none}
}

/* ── 复制反馈 Toast ───────────────────────────── */

.toast{
  position:fixed;left:50%;bottom:36px;z-index:90;
  transform:translate(-50%,14px);
  font-family:var(--mono);font-size:12.5px;letter-spacing:.02em;
  color:var(--text);
  background:rgba(13,21,36,.92);
  border:1px solid rgba(70,230,225,.34);
  border-radius:999px;padding:9px 18px;
  box-shadow:0 14px 40px rgba(0,0,0,.5);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  opacity:0;pointer-events:none;
  transition:opacity .28s ease,transform .28s cubic-bezier(.22,1,.36,1);
}
.toast.is-on{opacity:1;transform:translate(-50%,0)}
@media (max-width:560px){
  .toast{left:18px;right:18px;bottom:22px;transform:translateY(14px);text-align:center}
  .toast.is-on{transform:translateY(0)}
}

.sr-only{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}