/* 含羞草导航 — 胶片颗粒 / VHS 磁带 / 米黄与焦糖 */
:root{
  --cream:#f5e6c8;
  --cream-deep:#ecd9b4;
  --paper:#fbf2df;
  --caramel:#d4a574;
  --ink:#262117;
  --ink-2:#4b4132;
  --line:rgba(38,33,23,.26);
  --line-soft:rgba(38,33,23,.13);
  --bar:66px;
  --r:18px;
  --ui:'Exo','Roboto Mono',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --mono:'Roboto Mono','Exo',-apple-system,'PingFang SC','Microsoft YaHei',monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--ui);
  font-size:17px;
  line-height:1.75;
  color:var(--ink);
  background:var(--cream);
  overflow-x:hidden;
  padding-bottom:var(--bar);
}
body::before{
  content:'';
  position:fixed;
  inset:0;
  z-index:70;
  pointer-events:none;
  opacity:.15;
  mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;charset=utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='g'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='140' height='140' filter='url(%23g)'/></svg>");
  background-size:140px 140px;
}
a{color:inherit}
img{max-width:100%}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

/* 跳转 */
.skip{
  position:absolute;left:12px;top:-64px;z-index:80;
  padding:10px 16px;background:var(--ink);color:var(--cream);
  border-radius:0 0 12px 12px;text-decoration:none;
  font-family:var(--mono);font-size:.85rem;transition:top .2s ease;
}
.skip:focus{top:0}

/* 底部固定条 */
.bar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  min-height:var(--bar);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));
  background:rgba(245,230,200,.96);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
}
.brand{
  display:inline-flex;align-items:center;gap:9px;min-height:44px;padding:0 4px;
  text-decoration:none;font-weight:600;letter-spacing:.14em;font-size:.95rem;
}
.brand-dot{
  width:11px;height:11px;border-radius:50%;background:var(--caramel);
  box-shadow:0 0 0 3px rgba(212,165,116,.35);
  animation:pulse 3.4s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:.5}50%{opacity:1}}
.burger{
  display:inline-flex;align-items:center;gap:9px;min-height:44px;padding:0 15px;
  border:1px solid var(--ink);border-radius:999px;background:var(--paper);color:var(--ink);
  font-family:var(--mono);font-size:.8rem;letter-spacing:.14em;cursor:pointer;
}
.burger-lines{width:16px;height:2px;background:var(--ink);box-shadow:0 5px 0 var(--ink),0 -5px 0 var(--ink)}
.burger:hover{background:var(--caramel)}

/* 全屏遮罩菜单 */
.veil{
  position:fixed;inset:0;z-index:65;
  display:flex;flex-direction:column;gap:22px;
  padding:22px 20px calc(var(--bar) + 26px);
  background:rgba(38,33,23,.97);color:var(--cream);
  overflow-y:auto;opacity:0;visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;
}
.veil.open{opacity:1;visibility:visible}
.veil-head{display:flex;justify-content:flex-end}
.veil-close{
  min-height:44px;padding:0 16px;border:1px solid rgba(245,230,200,.5);border-radius:999px;
  background:transparent;color:var(--cream);font-family:var(--mono);font-size:.8rem;
  letter-spacing:.14em;cursor:pointer;
}
.veil-close:hover{background:rgba(245,230,200,.14)}
.finder{
  display:flex;align-items:center;gap:10px;
  padding:4px 8px 4px 16px;border:1px solid rgba(245,230,200,.4);border-radius:999px;
  background:rgba(245,230,200,.08);
}
.finder label{font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;color:var(--caramel)}
.finder input{
  flex:1;min-width:0;min-height:40px;border:0;background:transparent;
  color:var(--cream);font-family:var(--ui);font-size:1rem;outline:none;
}
.finder input::placeholder{color:rgba(245,230,200,.5)}
.veil nav ol{list-style:none;margin:0;padding:0;counter-reset:m}
.veil nav li{counter-increment:m}
.veil nav li.off{opacity:.28}
.veil nav a{
  display:flex;align-items:baseline;gap:14px;min-height:52px;padding:14px 4px;
  border-bottom:1px solid rgba(245,230,200,.18);
  text-decoration:none;color:var(--cream);font-size:clamp(1.05rem,2.6vw,1.4rem);
}
.veil nav a::before{content:counter(m,decimal-leading-zero);font-family:var(--mono);font-size:.72rem;color:var(--caramel)}
.veil nav a:hover{background:rgba(212,165,116,.16)}

/* 首屏 */
.hero{
  position:relative;min-height:100vh;min-height:100svh;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:clamp(18px,4vw,34px);text-align:center;
  padding:clamp(52px,9vh,90px) 20px clamp(26px,6vh,54px);
  overflow:hidden;
  background-color:var(--cream);
  background-image:radial-gradient(rgba(38,33,23,.16) 1px,transparent 1px);
  background-size:22px 22px;
}
.hero::before{
  content:'';position:absolute;inset:-30% -12%;pointer-events:none;
  background:
    radial-gradient(circle at 22% 18%,rgba(212,165,116,.6),transparent 46%),
    radial-gradient(circle at 82% 74%,rgba(255,214,150,.55),transparent 44%);
  mix-blend-mode:screen;opacity:.75;
  animation:leak 16s ease-in-out infinite alternate;
}
@keyframes leak{
  from{transform:translate3d(-2%,-1%,0) scale(1)}
  to{transform:translate3d(3%,2%,0) scale(1.08)}
}
.hero-copy{
  position:relative;z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  max-width:36ch;
}
.hero h1{
  margin:0;font-size:clamp(1.95rem,7vw,3.5rem);line-height:1.2;
  font-weight:600;letter-spacing:.02em;
}
.hero-lead{margin:0;max-width:32ch;font-size:1rem;line-height:1.8;color:var(--ink-2)}
.hero-cta{
  display:inline-flex;align-items:center;min-height:44px;padding:0 24px;
  border:1px solid var(--ink);border-radius:999px;background:var(--paper);
  text-decoration:none;font-family:var(--mono);font-size:.88rem;letter-spacing:.1em;
  transition:background .25s ease,transform .25s ease;
}
.hero-cta:hover{background:var(--caramel);transform:translateY(-2px)}
.hero-plate{
  position:relative;z-index:2;margin:0;
  width:min(420px,86vw);
  padding:10px 10px 30px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r);
  transform:rotate(-1.6deg);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.55);
}
.hero-plate::before{
  content:'';position:absolute;inset:10px 10px 30px;pointer-events:none;border-radius:10px;
  background:repeating-linear-gradient(180deg,rgba(38,33,23,.1) 0 1px,transparent 1px 3px);
  opacity:.5;animation:track 7s steps(3,end) infinite;
}
@keyframes track{
  0%,100%{transform:translateY(0) skewX(0)}
  45%{transform:translateY(1px) skewX(-1.2deg)}
  70%{transform:translateY(-1px) skewX(.9deg)}
}
.hero-shot,.hero-plate img{
  display:block;width:100%;height:clamp(150px,26vh,260px);
  object-fit:cover;border-radius:10px;
  filter:sepia(.22) contrast(1.06) saturate(.85);
}
.hero-plate figcaption{
  position:absolute;left:14px;right:14px;bottom:6px;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;
  color:var(--ink-2);text-align:center;
}

/* 主体：侧栏在左 */
.stage{
  display:grid;grid-template-columns:1fr;
  gap:clamp(26px,4vw,44px);align-items:start;
  max-width:1180px;margin:0 auto;
  padding:clamp(40px,7vw,80px) 20px clamp(48px,8vw,90px);
}
@media (min-width:920px){
  .stage{grid-template-columns:248px minmax(0,1fr);gap:52px}
}

/* 侧栏 */
.rail{
  border:1px solid var(--line);border-radius:var(--r);
  background:var(--paper);padding:18px 16px;
}
@media (min-width:920px){.rail{position:sticky;top:26px}}
.rail-kicker{display:block;font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;color:var(--ink-2)}
.rail h2{margin:.3rem 0 1rem;font-size:1.05rem;letter-spacing:.12em;font-weight:600}
.rail ol{list-style:none;margin:0;padding:0;counter-reset:rail}
.rail li{counter-increment:rail}
.rail li:first-child a{border-top:0}
.rail a{
  display:flex;align-items:baseline;gap:10px;min-height:42px;padding:8px 2px;
  border-top:1px dashed var(--line-soft);
  text-decoration:none;font-size:.95rem;line-height:1.45;
}
.rail a::before{content:counter(rail,decimal-leading-zero);font-family:var(--mono);font-size:.72rem;color:var(--caramel)}
.rail a:hover{background:rgba(212,165,116,.24)}

/* 正文 */
.prose{max-width:70ch;font-size:1.06rem}
.prose > section{
  padding-top:clamp(22px,3vw,32px);
  border-top:1px solid var(--line);
  margin-bottom:clamp(36px,5vw,56px);
  scroll-margin-top:24px;
}
.prose > section:first-child{border-top:0;padding-top:0}
.prose h2{
  margin:.2em 0 .6em;font-size:clamp(1.4rem,3.4vw,2rem);
  line-height:1.3;font-weight:600;
}
.prose h3{margin:1.4em 0 .5em;font-size:1.2rem}
.prose small{
  display:block;margin-bottom:.35em;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.22em;color:#8a5a24;
}
.prose p{margin:0 0 1.05em}
.prose a{color:#8a5a24;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{background:rgba(212,165,116,.3)}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.3em}
.prose li{margin:.35em 0}
.prose img{
  height:auto;border:1px solid var(--line);border-radius:12px;
  filter:sepia(.18) contrast(1.05) saturate(.9);
}
.prose figure{margin:1.2em 0}
.prose figcaption{margin-top:.5em;font-family:var(--mono);font-size:.75rem;color:var(--ink-2)}
.prose blockquote{
  margin:1.2em 0;padding:12px 18px;
  border-left:3px solid var(--caramel);border-radius:0 12px 12px 0;
  background:rgba(212,165,116,.2);font-size:.98rem;
}
.prose hr{border:0;border-top:1px dashed var(--line);margin:2em 0}
.prose code{
  font-family:var(--mono);font-size:.9em;
  background:rgba(38,33,23,.08);padding:.1em .35em;border-radius:5px;
}
.prose aside{
  margin:1.2em 0;padding:14px 16px;
  border:1px dashed var(--line);border-radius:12px;background:var(--paper);
  font-size:.96rem;
}

/* 页脚 */
.foot{
  border-top:1px solid var(--line);background:var(--cream-deep);
  padding:clamp(28px,5vw,44px) 20px calc(22px + env(safe-area-inset-bottom));
}
.signup{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:10px;max-width:560px;margin:0 auto;
}
.signup label{font-family:var(--mono);font-size:.75rem;letter-spacing:.2em;color:var(--ink-2)}
.signup input{
  flex:1 1 200px;min-width:0;min-height:44px;padding:0 15px;
  border:1px solid var(--line);border-radius:999px;background:var(--paper);
  font-family:var(--ui);font-size:1rem;color:var(--ink);
}
.signup button{
  min-height:44px;padding:0 20px;border:1px solid var(--ink);border-radius:999px;
  background:var(--ink);color:var(--cream);
  font-family:var(--mono);font-size:.82rem;letter-spacing:.14em;cursor:pointer;
}
.signup button:hover{background:var(--caramel);border-color:var(--caramel);color:var(--ink)}
.foot-line{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:8px 18px;margin-top:26px;padding-top:18px;
  border-top:1px dashed var(--line-soft);
  font-family:var(--mono);font-size:.78rem;color:var(--ink-2);text-align:center;
}
.foot-line address{font-style:normal;letter-spacing:.14em}
.foot-links{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 14px;list-style:none;margin:0;padding:0}
.foot-links a{
  display:inline-flex;align-items:center;min-height:40px;padding:0 2px;
  text-decoration:none;border-bottom:1px solid transparent;
}
.foot-links a:hover{border-color:var(--caramel)}
.copy{margin:0}

/* 滚动出现 */
.reveal-on .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.reveal-on .reveal.in{opacity:1;transform:none}

@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-on .reveal{opacity:1;transform:none}
}

@media (min-width:760px){
  .hero-lead{font-size:1.06rem}
  .foot-line{font-size:.8rem}
}

button[aria-expanded]{min-width:44px;min-height:44px}