/* ============================================================
   SOCIAL GANGSTER — Landing
   Design language: Dark Eastern Noir / Antique Gold on Charcoal
   Tokens mirrored from app/App.vue brand system
   ============================================================ */

:root{
  /* ---- Ink (charcoal) ---- */
  --ink-900:#0d0d12;
  --ink-800:#15151a;
  --ink-700:#1a1a20;
  --ink-600:#26262e;
  --ink-500:#32323c;

  /* ---- Section rhythm (tightened to kill dead gaps between blocks) ---- */
  --sec-y:clamp(3.5rem,8vw,7rem);     /* was 5rem~12rem */
  --sec-head-gap:clamp(2.25rem,4.5vw,3.25rem); /* gap under a section's h2 group */

  /* ---- Antique gold ---- */
  --gold-400:#e8d9b5;
  --gold-300:#dcc189;
  --gold-500:#c9a86a;
  --gold-600:#a8863f;
  --gold-mist:#f2e8d0;

  --grad-gold:linear-gradient(135deg,#dcc189 0%,#c9a86a 45%,#a8863f 100%);
  --grad-ink:linear-gradient(145deg,#23232b 0%,#15151a 65%);

  /* ---- Text ---- */
  --tx-1:#f7f0e1;
  --tx-2:#e8d9b5;
  --tx-3:#8e8e96;
  --tx-4:#5a5a63;

  /* ---- Type scale (1.25 major third, 16px base) ---- */
  --t-xs:0.75rem;
  --t-sm:0.875rem;
  --t-base:1rem;
  --t-md:1.125rem;
  --t-lg:1.375rem;
  --t-xl:1.75rem;
  --t-2xl:2.25rem;
  --t-3xl:3rem;
  --t-4xl:4.25rem;
  --t-hero:clamp(3.2rem,11vw,8.5rem);

  /* 中文标题：宋体撑江湖气。FOUT 缓解：在 webfont 到位前先用系统宋体（衬线）兜底，
     避免首屏从「无衬线系统字」跳到「宋体」的明显抖动。 */
  --font-cn:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --font-cn-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif; /* 中文正文：黑体，可读优先 */
  --font-cn-mix:"DM Sans","Noto Serif SC",serif; /* 标题含西文时：DM Sans 中性兼容宋体 */
  --font-en:"DM Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"DM Mono",ui-monospace,SFMono-Regular,monospace;

  /* ---- Space (8pt) ---- */
  --s-1:.5rem; --s-2:1rem;  --s-3:1.5rem; --s-4:2rem;
  --s-5:3rem;  --s-6:4rem;  --s-7:6rem;   --s-8:8rem;  --s-9:12rem;

  --r-sm:8px; --r-md:14px; --r-lg:22px; --r-xl:32px; --r-full:999px;

  /* ---- Elevation: dark-scene shadows need depth + gold ambience ---- */
  --sh-1:0 1px 2px rgba(0,0,0,.4);
  --sh-2:0 4px 16px rgba(0,0,0,.45);
  --sh-3:0 18px 48px rgba(0,0,0,.55);
  --sh-4:0 40px 90px rgba(0,0,0,.65);
  --sh-gold:0 4px 12px rgba(201,168,106,.25);
  --sh-gold-lg:0 12px 36px rgba(201,168,106,.2);

  /* ---- Motion: Premium archetype ---- */
  --ease:cubic-bezier(.4,0,.2,1);
  --ease-out:cubic-bezier(.05,.7,.1,1);
  --ease-in:cubic-bezier(.3,0,1,1);
  --d-quick:160ms;
  --d-std:420ms;
  --d-slow:720ms;

  --edge:rgba(201,168,106,.18);
  --edge-soft:rgba(201,168,106,.09);
  --edge-strong:rgba(201,168,106,.35);
  --maxw:1240px;
}

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

html{
  -webkit-text-size-adjust:100%;
  /* NOTE: never set scroll-behavior:smooth here — it fights Lenis
     and causes double-smoothing jank. Lenis owns smooth scrolling. */
}

body{
  margin:0;
  background:var(--ink-800);
  color:var(--tx-1);
  font-family:var(--font-cn-body);   /* 正文中文走黑体，可读优先 */
  font-size:var(--t-base);
  line-height:1.7;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  font-feature-settings:"kern" 1;
}

/* Film-grain overlay — sits above everything, never intercepts input.
   No mix-blend-mode (it forces a full-viewport recomposite every frame
   and is the #1 scroll-jank source); plain low-opacity overlay instead. */
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:9998;
  pointer-events:none;
  opacity:.045;
  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='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:160px 160px;
}

img{max-width:100%;display:block;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
input{font:inherit;}

::selection{background:var(--gold-500);color:var(--ink-900);}

h1,h2,h3,h4{
  font-family:var(--font-cn);
  font-weight:700;
  line-height:1.14;
  letter-spacing:.01em;          /* 中文宋体加字距更透气 */
  margin:0;
  text-wrap:balance;
}

p{margin:0;text-wrap:pretty;}

.shell{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(1.25rem,5vw,3rem);
}

/* Gold gradient text */
.gold-text{
  background:var(--grad-gold);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* ---------- Section label ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold-500);
  margin-bottom:var(--s-3);
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:var(--gold-600);
}

.sec{
  position:relative;
  padding-block:var(--sec-y);
}
/* Thin gold hairline between blocks — turns the dead-gap into intentional rhythm.
   Skip the first .sec after hero: it already has extra top padding, so the line
   would otherwise float in the middle of that whitespace instead of hugging the edge. */
.sec + .sec::before{
  content:"";
  position:absolute;
  top:0;left:50%;
  translate:-50% 0;
  width:min(100% - 2.5rem,var(--maxw));
  height:1px;
  background:linear-gradient(90deg,transparent,var(--edge-soft) 22%,var(--edge-soft) 78%,transparent);
  pointer-events:none;
}
.hero + .sec::before{display:none;}
/* First block after hero: keep a touch more breathing room off the fold */
.hero + .sec{padding-top:clamp(4rem,9vw,8rem);}

/* ============================================================
   CUSTOM CURSOR
   Requested feature. Non-hostile: never replaces the native
   cursor (elements keep their own), pointer-events:none,
   auto-disabled on touch + reduced-motion.
   ============================================================ */
.cursor,.cursor-ring{
  position:fixed;
  top:0;left:0;
  z-index:9999;
  pointer-events:none;
  border-radius:50%;
  opacity:0;
  will-change:transform;
}
.cursor{
  width:7px;height:7px;
  background:var(--gold-300);
  margin:-3.5px 0 0 -3.5px;
  transition:opacity var(--d-std) var(--ease);
}
.cursor-ring{
  width:34px;height:34px;
  margin:-17px 0 0 -17px;
  border:1px solid rgba(201,168,106,.5);
  transition:width var(--d-quick) var(--ease),
             height var(--d-quick) var(--ease),
             margin var(--d-quick) var(--ease),
             background-color var(--d-quick) var(--ease),
             border-color var(--d-quick) var(--ease),
             opacity var(--d-std) var(--ease);
}
body.cursor-on .cursor,
body.cursor-on .cursor-ring{opacity:1;}
body.cursor-on.cursor-hot .cursor-ring{
  width:64px;height:64px;
  margin:-32px 0 0 -32px;
  background:rgba(201,168,106,.1);
  border-color:rgba(220,193,137,.75);
}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:fixed;
  inset:0 0 auto 0;
  z-index:900;
  padding-block:var(--s-2);
  transition:background-color var(--d-std) var(--ease),
             border-color var(--d-std) var(--ease),
             backdrop-filter var(--d-std) var(--ease);
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(13,13,18,.72);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom-color:var(--edge-soft);
}
.nav-in{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:var(--s-3);
}
.nav-brand{
  display:flex;
  align-items:center;
  gap:.7rem;
  text-decoration:none;
  color:var(--tx-1);
}
.nav-brand img{width:34px;height:34px;}
.nav-brand b{
  font-family:var(--font-cn);
  font-size:var(--t-md);
  letter-spacing:.06em;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:var(--s-4);
}
.nav-links a{
  color:var(--tx-3);
  text-decoration:none;
  font-size:var(--t-sm);
  letter-spacing:.04em;
  transition:color var(--d-quick) var(--ease);
}
.nav-links a:hover{color:var(--gold-400);}

/* Buttons */
/* Magnetic offset, defaults to zero so non-JS / touch stays put */
[data-magnetic]{--tx:0px;--ty:0px;}

.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6rem;
  padding:1rem 1.9rem;
  border-radius:var(--r-full);
  font-size:var(--t-sm);
  font-weight:600;
  letter-spacing:.05em;
  text-decoration:none;
  white-space:nowrap;
  cursor:pointer;
  transform:translate(var(--tx,0),var(--ty,0));
  transition:transform var(--d-quick) var(--ease),
             box-shadow var(--d-std) var(--ease),
             background-color var(--d-quick) var(--ease),
             border-color var(--d-quick) var(--ease),
             color var(--d-quick) var(--ease),
             filter var(--d-quick) var(--ease);
}
/* 流光扫过的高光层，提升金色按钮质感 */
.btn-gold::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.55) 50%,transparent 70%);
  background-size:250% 100%;
  background-position:-120% 0;
  opacity:0;
  pointer-events:none;
}
.btn-gold:hover::before{
  opacity:1;
  animation:btn-sheen .9s var(--ease) forwards;
}
@keyframes btn-sheen{
  to{background-position:220% 0;}
}
/* 金色主按钮：仅主 CTA（带 .btn-arrow）追加箭头，强化行动指向；
   ghost 按钮与次要金按钮不加箭头，避免主次对比被削弱。 */
.btn-gold.btn-arrow::after{
  content:"";
  width:9px;height:9px;
  border-right:2px solid currentColor;
  border-top:2px solid currentColor;
  transform:rotate(45deg);
  margin-left:2px;
  flex:none;
  transition:transform var(--d-quick) var(--ease);
}
.btn-gold.btn-arrow:hover::after{transform:rotate(45deg) translate(3px,-3px);}
.btn-gold{
  background:var(--grad-gold);
  color:var(--ink-900);
  font-weight:700;
  box-shadow:var(--sh-gold);
  overflow:hidden;
}
.btn-gold:hover{
  box-shadow:var(--sh-gold-lg);
  filter:brightness(1.06);
}
.btn-gold:active{
  filter:brightness(.94);
  box-shadow:0 2px 8px rgba(201,168,106,.2);
}
.btn-ghost{
  border:1px solid var(--edge);
  color:var(--tx-2);
}
.btn-ghost:hover{
  border-color:var(--gold-500);
  color:var(--gold-300);
  background:rgba(201,168,106,.06);
}
.btn-ghost:active{
  background:rgba(201,168,106,.12);
  filter:brightness(.95);
}
.btn:focus-visible,
a:focus-visible,
input:focus-visible,
button:focus-visible{
  outline:2px solid var(--gold-500);
  outline-offset:3px;
}

/* ============================================================
    1. HERO
    ============================================================ */
.hero{
  position:relative;
  min-height:100svh;
  display:flex;
  align-items:center;
  overflow:hidden;
  padding-top:var(--s-7);
}

/* Full-width comic banner background */
.hero-banner{
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  will-change:transform;
}
.hero-banner img{
  width:100%;
  height:120%;
  object-fit:cover;
  object-position:center 20%;
  opacity:.55;
  /* slow parallax drift driven by GSAP in JS */
}

/* Gradient mask: dark at top for text legibility, transparent at bottom to reveal banner */
.hero-banner-mask{
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:
    linear-gradient(180deg,
    rgba(13,13,18,.92) 0%,
    rgba(13,13,18,.7) 35%,
    rgba(13,13,18,.45) 60%,
    rgba(13,13,18,.2) 80%,
    transparent 100%),
    radial-gradient(ellipse 80% 50% at 30% 50%, rgba(13,13,18,.75), transparent);
}

/* Ambient layer: breathing gold halo */
.hero-halo{
  position:absolute;
  z-index:2;
  border-radius:50%;
  filter:blur(90px);
  pointer-events:none;
}
.hero-halo--a{
  width:min(56vw,720px);
  aspect-ratio:1;
  top:-14%;left:20%;
  background:radial-gradient(circle,rgba(201,168,106,.18),transparent 68%);
  animation:breathe 9s var(--ease) infinite;
}
.hero-halo--b{
  width:min(38vw,460px);
  aspect-ratio:1;
  bottom:-18%;right:-6%;
  background:radial-gradient(circle,rgba(168,134,63,.12),transparent 70%);
  animation:breathe 11s var(--ease) infinite reverse;
}
@keyframes breathe{
  0%,100%{transform:scale(1);opacity:.85;}
  50%{transform:scale(1.13);opacity:1;}
}

.hero-in{
  position:relative;z-index:3;width:100%;
}
.hero-content{max-width:56ch;}

.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  padding:.42rem 1rem .42rem .55rem;
  border:1px solid var(--edge);
  border-radius:var(--r-full);
  background:rgba(38,38,46,.5);
  backdrop-filter:blur(8px);
  font-size:var(--t-xs);
  letter-spacing:.14em;
  color:var(--tx-2);
  margin-bottom:var(--s-4);
}
.hero-badge i{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--gold-300);
  box-shadow:0 0 0 0 rgba(220,193,137,.6);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(220,193,137,.55);}
  70%{box-shadow:0 0 0 11px rgba(220,193,137,0);}
  100%{box-shadow:0 0 0 0 rgba(220,193,137,0);}
}

.hero h1{
  font-size:var(--t-hero);
  font-weight:900;
  letter-spacing:.04em;
  line-height:.94;
  margin-bottom:var(--s-3);
}
/* per-char reveal targets */
.hero h1 .ch{
  display:inline-block;
}

.hero-sub{
  font-size:clamp(1rem,2.4vw,var(--t-lg));
  color:var(--tx-2);
  max-width:34ch;
  margin-bottom:var(--s-2);
}
.hero-note{
  font-size:var(--t-sm);
  color:var(--tx-3);
  max-width:44ch;
  margin-bottom:var(--s-5);
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:var(--s-2);
  margin-bottom:var(--s-6);
}

.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(1.5rem,5vw,var(--s-6));
  padding-top:var(--s-3);
  border-top:1px solid var(--edge-soft);
  max-width:640px;
}
.hero-stat b{
  display:block;
  font-family:var(--font-cn);
  font-size:var(--t-xl);
  color:var(--gold-300);
  line-height:1.2;
}
.hero-stat span{
  font-size:var(--t-xs);
  color:var(--tx-3);
  letter-spacing:.12em;
}

.scroll-cue{
  position:absolute;
  left:50%;bottom:2rem;
  translate:-50% 0;
  z-index:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.5rem;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.3em;
  color:var(--tx-4);
}
.scroll-cue i{
  width:1px;height:52px;
  background:linear-gradient(to bottom,var(--gold-500),transparent);
  animation:cue 2.2s var(--ease) infinite;
  transform-origin:top;
}
@keyframes cue{
  0%{transform:scaleY(0);opacity:0;}
  40%{transform:scaleY(1);opacity:1;}
  100%{transform:scaleY(1) translateY(52px);opacity:0;}
}

/* ============================================================
   2. PAIN POINTS
   ============================================================ */
.pain{background:linear-gradient(180deg,var(--ink-800),var(--ink-700));}
.pain-layout{
  display:grid;
  grid-template-columns:1fr 1fr;
  align-items:center;
  gap:clamp(2rem,5vw,var(--s-6));
  margin-bottom:var(--s-6);
}
.pain-head{max-width:56ch;}
.pain-head h2{font-size:clamp(1.9rem,5vw,var(--t-3xl));margin-bottom:var(--s-2);}
.pain-head p{color:var(--tx-3);}

/* Pain section visual */
.pain-img{
  position:relative;
  border-radius:var(--r-xl);
  overflow:hidden;
  border:1px solid var(--edge-soft);
  box-shadow:var(--sh-3);
  aspect-ratio:3/4;
  max-height:480px;
}
.pain-img img{
  width:100%;height:100%;
  object-fit:cover;
  opacity:.85;
}

.pain-list{
  display:grid;
  gap:0;
  border-top:1px solid var(--edge-soft);
}
.pain-row{
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:clamp(1rem,3vw,var(--s-4));
  padding-block:clamp(1.4rem,3.5vw,var(--s-4));
  border-bottom:1px solid var(--edge-soft);
  transition:background-color var(--d-std) var(--ease),
             padding-inline var(--d-std) var(--ease);
}
.pain-row:hover{
  background:rgba(201,168,106,.04);
  padding-inline:var(--s-2);
}
.pain-no{
  font-family:var(--font-mono);
  font-size:var(--t-xs);
  color:var(--gold-600);
  letter-spacing:.1em;
}
.pain-q{
  font-family:var(--font-cn);
  font-size:clamp(1.1rem,3vw,var(--t-xl));
  color:var(--tx-1);
  font-weight:600;
}
.pain-a{
  font-size:var(--t-sm);
  color:var(--tx-3);
  text-align:right;
  max-width:30ch;
}

/* ============================================================
   3. PHONE / SCENE SHOWCASE
   ============================================================ */
.scenes{
  background:var(--ink-700);
  overflow:hidden;
}
.scenes-in{
  display:grid;
  grid-template-columns:1fr minmax(280px,340px) 1fr;
  align-items:center;
  gap:clamp(1.5rem,4vw,var(--s-5));
}
.scene-side h2{
  font-size:clamp(1.7rem,4.4vw,var(--t-2xl));
  margin-bottom:var(--s-2);
}
.scene-side p{color:var(--tx-3);font-size:var(--t-sm);}

.scene-tabs{
  display:flex;
  flex-direction:column;
  gap:.35rem;
  margin-top:var(--s-4);
}
.scene-tab{
  display:flex;
  align-items:center;
  gap:.8rem;
  padding:.75rem 1rem;
  border-radius:var(--r-md);
  border:1px solid transparent;
  color:var(--tx-2);
  font-size:var(--t-sm);
  text-align:left;
  width:100%;
  transition:color var(--d-std) var(--ease),
             border-color var(--d-std) var(--ease),
             background-color var(--d-std) var(--ease);
}
.scene-tab em{
  font-family:var(--font-mono);
  font-style:normal;
  font-size:12px;
  color:var(--gold-600);
  opacity:1;
  transition:color var(--d-quick) var(--ease);
}
.scene-tab.is-on em{color:var(--gold-300);}
.scene-tab.is-on{
  color:var(--gold-300);
  border-color:var(--edge);
  background:rgba(201,168,106,.07);
}

/* Phone frame */
.phone-wrap{
  perspective:1400px;
  display:flex;
  justify-content:center;
}
/* Skip-link — keyboard accessibility */
.skip-link{
  position:absolute;
  top:-100%;left:var(--s-2);
  padding:.6rem 1rem;
  border-radius:var(--r-md);
  background:var(--ink-900);
  color:var(--gold-300);
  font-size:var(--t-sm);
  text-decoration:none;
  z-index:10000;
  transition:top var(--d-quick) var(--ease);
}
.skip-link:focus{
  top:var(--s-2);
  outline:2px solid var(--gold-500);
  outline-offset:2px;
}

/* Mobile nav toggle */
.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  border:1px solid var(--edge-soft);
  border-radius:var(--r-sm);
  color:var(--tx-2);
  transition:border-color var(--d-quick) var(--ease),
             background-color var(--d-quick) var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-500);background:rgba(201,168,106,.06);}
.nav-toggle svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round;}

/* Phone gold-pulse on scene switch */
.phone{
  position:relative;
  width:100%;
  max-width:330px;
  aspect-ratio:9/19;
  border-radius:44px;
  padding:11px;
  background:linear-gradient(155deg,#3a3a45,#15151a 55%);
  box-shadow:var(--sh-4),0 0 0 1px rgba(201,168,106,.16);
  transform-style:preserve-3d;
  will-change:transform;
  overflow:hidden;
}
.phone::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  pointer-events:none;
  box-shadow:0 0 0 0 rgba(201,168,106,0);
  transition:box-shadow 600ms var(--ease-out);
  z-index:4;
}
.phone.gold-pulse::after{
  box-shadow:inset 0 0 40px rgba(201,168,106,.15),0 0 32px rgba(201,168,106,.25);
}
.phone::before{ /* notch */
  content:"";
  position:absolute;
  top:20px;left:50%;
  translate:-50% 0;
  width:104px;height:24px;
  border-radius:var(--r-full);
  background:#0b0b0f;
  z-index:3;
}
.phone-screen{
  position:relative;
  height:100%;
  border-radius:34px;
  overflow:hidden;
  background:var(--ink-800);
  display:flex;
  flex-direction:column;
}
.phone-status{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:2.6rem 1.15rem .5rem;
  font-family:var(--font-mono);
  font-size:10px;
  color:var(--tx-3);
  flex:none;
}
.phone-body{
  flex:1;
  overflow:hidden;
  padding:.35rem 1.15rem 1.15rem;
  display:flex;
  flex-direction:column;
  gap:.7rem;
}
.phone-brand{
  display:flex;
  align-items:center;
  gap:.55rem;
  flex:none;
}
.phone-brand img{width:26px;height:26px;}
.phone-brand b{
  font-family:var(--font-cn);
  font-size:13px;
  letter-spacing:.05em;
}
.phone-brand span{
  margin-left:auto;
  font-size:9px;
  color:var(--tx-4);
}

/* Slides */
.phone-slides{position:relative;flex:1;}
.slide{
  position:absolute;
  inset:0;
  display:flex;
  flex-direction:column;
  gap:.55rem;
  opacity:0;
  visibility:hidden;
  transform:translateY(14px);
  transition:opacity var(--d-std) var(--ease),
             transform var(--d-std) var(--ease),
             visibility var(--d-std) var(--ease);
}
.slide.is-on{opacity:1;visibility:visible;transform:none;}

.s-card{
  border:1px solid var(--edge-soft);
  border-radius:var(--r-md);
  background:var(--grad-ink);
  padding:.7rem .8rem;
}
.s-eyebrow{
  font-family:var(--font-mono);
  font-size:8px;
  letter-spacing:.18em;
  color:var(--gold-600);
  margin-bottom:.3rem;
}
.s-title{
  font-family:var(--font-cn);
  font-size:14px;
  font-weight:600;
  color:var(--tx-1);
  line-height:1.35;
  margin-bottom:.25rem;
}
.s-text{font-size:10.5px;color:var(--tx-3);line-height:1.6;}
.s-chips{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:.5rem;}
.s-chip{
  font-size:9px;
  padding:.24rem .5rem;
  border-radius:var(--r-full);
  border:1px solid var(--edge);
  color:var(--tx-2);
}
.s-cta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:.4rem;
  padding:.6rem;
  border-radius:var(--r-full);
  background:var(--grad-gold);
  color:var(--ink-900);
  font-size:11px;
  font-weight:700;
  flex:none;
}
.s-bubble{
  border-radius:var(--r-md);
  padding:.55rem .7rem;
  font-size:10.5px;
  line-height:1.55;
  max-width:86%;
}
.s-bubble--them{
  background:var(--ink-600);
  color:var(--tx-2);
  border-top-left-radius:4px;
}
.s-bubble--me{
  background:rgba(201,168,106,.15);
  border:1px solid var(--edge);
  color:var(--gold-400);
  align-self:flex-end;
  border-top-right-radius:4px;
}

/* ============================================================
   4. AI DEMO
   ============================================================ */
.demo{background:linear-gradient(180deg,var(--ink-700),var(--ink-800));}
.demo-head{
  max-width:60ch;
  margin-bottom:var(--s-5);
}
.demo-head h2{font-size:clamp(1.9rem,5vw,var(--t-3xl));margin-bottom:var(--s-2);}
.demo-head p{color:var(--tx-3);}

.demo-box{
  border:1px solid var(--edge);
  border-radius:var(--r-xl);
  background:var(--grad-ink);
  box-shadow:var(--sh-3);
  overflow:hidden;
}
.demo-bar{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding:.85rem 1.2rem;
  border-bottom:1px solid var(--edge-soft);
  background:rgba(13,13,18,.4);
}
.demo-bar i{
  width:9px;height:9px;
  border-radius:50%;
  background:var(--ink-500);
}
.demo-bar i:first-child{background:var(--gold-600);}
.demo-bar span{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--tx-4);
}

.demo-input{
  display:flex;
  flex-wrap:wrap;
  gap:.75rem;
  padding:clamp(1.1rem,3vw,var(--s-3));
}
.demo-field{
  position:relative;
  flex:1 1 260px;
}
.demo-field input{
  width:100%;
  padding:.95rem 1.1rem;
  border-radius:var(--r-md);
  border:1px solid var(--edge-soft);
  background:rgba(13,13,18,.55);
  color:var(--tx-1);
  transition:border-color var(--d-quick) var(--ease),
             box-shadow var(--d-quick) var(--ease);
}
.demo-field input::placeholder{color:var(--tx-4);}
.demo-field input:focus{
  border-color:var(--edge-strong);
  box-shadow:0 0 0 3px rgba(201,168,106,.06);
  outline:none;
}
.demo-run{
  padding-inline:1.8rem;
  flex:0 0 auto;
}
.demo-run[disabled]{opacity:.55;cursor:progress;}

.demo-presets{
  display:flex;
  flex-wrap:wrap;
  gap:.45rem;
  padding:0 clamp(1.1rem,3vw,var(--s-3)) clamp(1.1rem,3vw,var(--s-3));
}
.preset{
  padding:.4rem .85rem;
  border-radius:var(--r-full);
  border:1px solid var(--edge-soft);
  color:var(--tx-3);
  font-size:var(--t-xs);
  cursor:pointer;
  transition:color var(--d-quick) var(--ease),
             border-color var(--d-quick) var(--ease),
             background-color var(--d-quick) var(--ease),
             transform var(--d-quick) var(--ease);
}
.preset:hover{
  color:var(--gold-300);
  border-color:var(--gold-600);
  background:rgba(201,168,106,.07);
}
.preset:active{transform:scale(.95);}

.demo-out{
  border-top:1px solid var(--edge-soft);
  padding:clamp(1.1rem,3vw,var(--s-4));
  min-height:270px;
  background:rgba(13,13,18,.3);
}
.demo-empty{
  height:100%;
  min-height:230px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:.65rem;
  color:var(--tx-4);
  font-size:var(--t-sm);
  text-align:center;
}
.demo-empty img{width:52px;opacity:.35;}

.demo-steps{display:grid;gap:var(--s-2);}
.step{
  display:grid;
  grid-template-columns:auto 1fr;
  gap:var(--s-2);
  opacity:0;
  transform:translateY(16px);
  transition:opacity var(--d-std) var(--ease),
             transform var(--d-std) var(--ease);
}
.step.is-in{opacity:1;transform:none;}
.step-tag{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--gold-500);
  padding:.3rem .6rem;
  border:1px solid var(--edge);
  border-radius:var(--r-sm);
  height:fit-content;
  white-space:nowrap;
}
.step-body p{
  font-size:var(--t-sm);
  color:var(--tx-2);
  line-height:1.75;
}
.step-why{
  margin-top:.4rem;
  font-size:var(--t-xs);
  color:var(--tx-4);
}
.caret{
  display:inline-block;
  width:2px;height:1em;
  background:var(--gold-300);
  vertical-align:-2px;
  margin-left:2px;
  animation:blink 1s step-end infinite;
}
@keyframes blink{50%{opacity:0;}}

.demo-guard{
  display:flex;
  align-items:flex-start;
  gap:.6rem;
  margin-top:var(--s-3);
  padding-top:var(--s-2);
  border-top:1px dashed var(--edge-soft);
  font-size:var(--t-xs);
  color:var(--tx-4);
}
.demo-guard b{color:var(--gold-600);font-weight:500;}

/* ============================================================
   5. FEATURES — bento
   ============================================================ */
.feat{background:var(--ink-800);}
.feat-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:var(--s-3);
  margin-bottom:var(--s-5);
}
.feat-head h2{font-size:clamp(1.9rem,5vw,var(--t-3xl));}
.feat-head p{color:var(--tx-3);max-width:38ch;font-size:var(--t-sm);}

.bento{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:clamp(.75rem,1.6vw,1.1rem);
}
.cell{
  position:relative;
  grid-column:span 2;
  padding:clamp(1.2rem,2.6vw,1.75rem);
  border:1px solid var(--edge-soft);
  border-radius:var(--r-lg);
  background:var(--grad-ink);
  overflow:hidden;
  transform-style:preserve-3d;
  transition:border-color var(--d-std) var(--ease),
             box-shadow var(--d-std) var(--ease);
}
.cell::before{ /* gold sheen following pointer */
  content:"";
  position:absolute;
  inset:0;
  opacity:0;
  pointer-events:none;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),rgba(201,168,106,.13),transparent 62%);
  transition:opacity var(--d-std) var(--ease);
}
.cell:hover{
  border-color:var(--edge);
  box-shadow:var(--sh-3);
}
.cell:hover::before{opacity:1;}
.cell--wide{grid-column:span 3;}
.cell--tall{grid-row:span 2;}

.cell-ico{
  width:52px;height:52px;
  display:grid;
  place-items:center;
  border-radius:var(--r-lg);
  border:1px solid var(--edge);
  background:radial-gradient(120% 120% at 50% 0%,rgba(201,168,106,.16),rgba(201,168,106,.05));
  margin-bottom:var(--s-2);
  transition:border-color var(--d-quick) var(--ease),
             background var(--d-quick) var(--ease),
             box-shadow var(--d-std) var(--ease);
}
.cell-ico svg{
  width:26px;height:26px;
  stroke:var(--gold-300);
  fill:none;stroke-width:2;
  transition:transform var(--d-std) var(--ease),
             stroke var(--d-quick) var(--ease);
}
.cell:hover .cell-ico{
  border-color:var(--gold-600);
  box-shadow:0 8px 24px rgba(201,168,106,.18);
}
.cell:hover .cell-ico svg{
  transform:scale(1.12) translateY(-1px);
  stroke:var(--gold-400);
}
.cell h3{
  font-size:var(--t-md);
  margin-bottom:.4rem;
  letter-spacing:.02em;
}
.cell p{font-size:var(--t-sm);color:var(--tx-3);}
.cell-list{
  list-style:none;
  margin:var(--s-2) 0 0;
  padding:0;
  display:grid;
  gap:.5rem;
}
.cell-list li{
  display:flex;
  gap:.55rem;
  font-size:var(--t-xs);
  color:var(--tx-4);
}
.cell-list li::before{
  content:"—";
  color:var(--gold-600);
}

/* ============================================================
   6. STYLE TAGS
   ============================================================ */
.styles{
  background:linear-gradient(180deg,var(--ink-800),var(--ink-900));
  text-align:center;
}
.styles h2{font-size:clamp(1.9rem,5vw,var(--t-3xl));margin-bottom:var(--s-2);}
.styles > .shell > p{color:var(--tx-3);margin-bottom:var(--s-4);}

/* Styles section visual */
.styles-visual{
  max-width:800px;
  margin:0 auto var(--s-5);
  border-radius:var(--r-xl);
  overflow:hidden;
  border:1px solid var(--edge-soft);
  box-shadow:var(--sh-2);
}
.styles-visual img{
  width:100%;height:auto;
  opacity:.8;
  display:block;
}
.tagcloud{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:clamp(.6rem,1.6vw,1rem);
}
.tag{
  position:relative;
  padding:.75rem 1.7rem;
  border-radius:var(--r-full);
  border:1px solid var(--edge);
  font-family:var(--font-cn);
  font-size:clamp(1rem,2.6vw,var(--t-lg));
  color:var(--tx-2);
  background:rgba(38,38,46,.35);
  transform:translate(var(--tx,0),calc(var(--ty,0px) + var(--lift,0px)));
  transition:transform var(--d-std) var(--ease),
             color var(--d-std) var(--ease),
             border-color var(--d-std) var(--ease),
             box-shadow var(--d-std) var(--ease);
}
.tag:hover{
  --lift:-5px;
  color:var(--ink-900);
  background:var(--grad-gold);
  border-color:transparent;
  box-shadow:var(--sh-gold);
}
.tag:active{
  --lift:0px;
  filter:brightness(.94);
}
.tag small{
  display:block;
  font-family:var(--font-en);
  font-size:10px;
  letter-spacing:.16em;
  opacity:.55;
}

/* ============================================================
   7. CTA
   ============================================================ */
.cta{background:var(--ink-900);}
.cta-box{
  position:relative;
  border:1px solid var(--edge);
  border-radius:var(--r-xl);
  background:var(--grad-ink);
  box-shadow:var(--sh-4);
  overflow:hidden;
  display:grid;
  grid-template-columns:1fr 1fr;
}
.cta-box::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:var(--grad-gold);
}
.cta-col{padding:clamp(1.75rem,4vw,var(--s-5));}
.cta-col + .cta-col{border-left:1px solid var(--edge-soft);}
.cta-col h3{font-size:var(--t-lg);margin-bottom:.6rem;}
.cta-col > p{color:var(--tx-3);font-size:var(--t-sm);margin-bottom:var(--s-3);}

.qr{
  display:flex;
  align-items:center;
  gap:var(--s-3);
}
.qr-img{
  width:150px;height:150px;
  flex:none;
  border-radius:var(--r-md);
  border:1px solid var(--edge);
  background:var(--gold-mist);
  padding:10px;
  display:grid;
  place-items:center;
}
.qr-img img{width:100%;height:100%;object-fit:contain;}
.qr-meta ul{
  list-style:none;
  margin:0;padding:0;
  display:grid;
  gap:.55rem;
}
.qr-meta li{
  display:flex;
  gap:.5rem;
  font-size:var(--t-sm);
  color:var(--tx-2);
}
.qr-meta li svg{
  width:16px;height:16px;
  flex:none;
  stroke:var(--gold-500);
  fill:none;
  stroke-width:2;
  margin-top:.28rem;
}

.wait-form{display:grid;gap:.75rem;}
.wait-form input{
  padding:.95rem 1.1rem;
  border-radius:var(--r-md);
  border:1px solid var(--edge-soft);
  background:rgba(13,13,18,.55);
  color:var(--tx-1);
  transition:border-color var(--d-quick) var(--ease),
             box-shadow var(--d-quick) var(--ease);
}
.wait-form input::placeholder{color:var(--tx-4);}
.wait-form input:focus{
  border-color:var(--edge-strong);
  box-shadow:0 0 0 3px rgba(201,168,106,.06);
  outline:none;
}
.wait-form button{width:100%;}
.wait-form button:disabled{opacity:.6;cursor:not-allowed;}
.wait-msg{
  font-size:var(--t-xs);
  min-height:1.2em;
  color:var(--gold-400);
}
.wait-msg[data-bad="1"]{color:#e5484d;}
.wait-hint{font-size:var(--t-xs);color:var(--tx-4);}

/* ============================================================
   8. FOOTER
   ============================================================ */
.foot{
  border-top:1px solid var(--edge-soft);
  background:var(--ink-900);
  padding-block:var(--s-4);
}
.foot-in{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:var(--s-2);
}
.foot-brand{
  display:flex;
  align-items:center;
  gap:.6rem;
  font-family:var(--font-cn);
  color:var(--tx-2);
  letter-spacing:.06em;
}
.foot-brand img{width:26px;height:26px;}
.foot p{font-size:var(--t-xs);color:var(--tx-4);max-width:52ch;}
.foot-links{
  display:flex;
  flex-wrap:wrap;
  gap:1.1rem;
  order:3;
  width:100%;
  margin-top:var(--s-2);
  padding-top:var(--s-2);
  border-top:1px solid var(--edge-soft);
}
.foot-links a{
  font-size:var(--t-sm);
  color:var(--tx-3);
  text-decoration:none;
  transition:color var(--d-quick) var(--ease);
}
.foot-links a:hover{color:var(--gold-300);}

/* ============================================================
   5.5 SOCIAL PROOF
   ============================================================ */
.proof{background:var(--ink-800);}
.proof-head{text-align:center;margin-bottom:var(--sec-head-gap);}
.proof-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:var(--s-3);
}
.quote{
  margin:0;
  border:1px solid var(--edge);
  border-radius:var(--r-lg);
  background:var(--grad-ink);
  padding:var(--s-4);
  display:flex;
  flex-direction:column;
  gap:var(--s-3);
  box-shadow:var(--sh-2);
}
.quote blockquote{
  margin:0;
  font-family:var(--font-cn);
  font-size:var(--t-md);
  line-height:1.85;
  color:var(--tx-1);
}
.quote figcaption{
  display:flex;
  align-items:baseline;
  gap:.6rem;
  margin-top:auto;
}
.quote-who{
  font-family:var(--font-cn);
  font-weight:700;
  color:var(--gold-300);
  font-size:var(--t-sm);
}
.quote-role{font-size:var(--t-xs);color:var(--tx-4);}
.proof-num{
  text-align:center;
  margin-top:var(--s-5);
  font-family:var(--font-cn);
  color:var(--tx-2);
  font-size:var(--t-md);
}
.proof-num b{
  font-size:var(--t-2xl);
  color:var(--gold-300);
  margin-right:.3rem;
}

/* ============================================================
   5.6 PRICING
   ============================================================ */
.pricing{background:var(--ink-900);}
.price-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:var(--s-3);
  max-width:760px;
  margin:var(--sec-head-gap) auto 0;
}
.price-card{
  position:relative;
  border:1px solid var(--edge);
  border-radius:var(--r-lg);
  background:var(--grad-ink);
  padding:var(--s-4);
  display:flex;
  flex-direction:column;
  gap:var(--s-2);
  box-shadow:var(--sh-2);
}
.price-card--hot{
  border-color:var(--gold-500);
  box-shadow:0 0 0 1px var(--gold-500),var(--sh-gold);
}
.price-flag{
  position:absolute;
  top:-12px;right:var(--s-3);
  font-size:var(--t-xs);
  font-weight:700;
  letter-spacing:.05em;
  color:var(--ink-900);
  background:var(--grad-gold);
  padding:.25rem .7rem;
  border-radius:var(--r-full);
}
.price-card h3{font-size:var(--t-lg);margin:0;}
.price-amt{display:flex;align-items:baseline;gap:.4rem;color:var(--gold-300);}
.price-amt b{font-size:var(--t-3xl);font-family:var(--font-cn);}
.price-amt span{font-size:var(--t-sm);color:var(--tx-3);}
.price-list{
  list-style:none;
  margin:0;padding:0;
  display:grid;
  gap:.6rem;
  font-size:var(--t-sm);
  color:var(--tx-2);
}
.price-list li{
  padding-left:1.3rem;
  position:relative;
}
.price-list li::before{
  content:"";
  position:absolute;
  left:0;top:.55em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--gold-500);
}
.price-cta{margin-top:auto;width:100%;}

/* App store button (CTA) */
.store-btn{
  margin-top:var(--s-3);
  width:100%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55rem;
}
.store-ico{width:18px;height:18px;fill:var(--ink-900);}

/* Block button inside card (full width) */
.btn-block{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:100%;
  margin-top:var(--s-3);
}

/* App store "coming soon" placeholder (non-clickable) */
.store-btn-coming{
  margin-top:var(--s-3);
  width:100%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:.95rem 1.4rem;
  border-radius:999px;
  border:1px dashed rgba(201,168,106,.45);
  background:rgba(201,168,106,.05);
  color:var(--gold-300, #c9a86a);
  font-size:var(--t-sm,#14px);
  font-weight:600;
  letter-spacing:.04em;
  cursor:not-allowed;
  user-select:none;
}

/* ============================================================
   REVEAL (JS-driven, no-JS safe)
   ============================================================ */
.rv{
  opacity:0;
  transform:translateY(28px);
}
.rv.is-in{
  opacity:1;
  transform:none;
  transition:opacity var(--d-slow) var(--ease),
             transform var(--d-slow) var(--ease);
}
html.no-js .rv{opacity:1;transform:none;}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1024px){
  .pain-layout{grid-template-columns:1fr;}
  .pain-img{max-height:320px;aspect-ratio:16/9;}
  .scenes-in{grid-template-columns:1fr;justify-items:center;text-align:center;}
  .scene-side{max-width:52ch;}
  .scene-tabs{
    flex-direction:row;
    flex-wrap:wrap;
    justify-content:center;
  }
  .scene-tab{width:auto;}
  /* 移动端保持线性阅读流：标题 → 手机(含场景 tabs) → 说明，
     不再把手机顶到最前导致动线断裂。 */
  .scenes-in{display:flex;flex-direction:column;align-items:stretch;}
  .cell,.cell--wide{grid-column:span 3;}
  .cell--tall{grid-row:span 1;}
}
@media (max-width:760px){
  .nav-toggle{display:inline-flex;}
  .nav-links{
    position:fixed;
    inset:0 0 0 auto;
    width:280px;
    flex-direction:column;
    align-items:flex-start;
    gap:var(--s-3);
    padding:5rem var(--s-4) var(--s-4);
    background:rgba(13,13,18,.96);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    border-left:1px solid var(--edge-soft);
    transform:translateX(100%);
    transition:transform var(--d-std) var(--ease);
    z-index:899;
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-links a:not(.btn){display:inline;font-size:var(--t-base);}
  .pain-layout{grid-template-columns:1fr;}
  .pain-img{max-height:240px;}
  .pain-row{grid-template-columns:auto 1fr;}
  .pain-a{
    grid-column:2;
    text-align:left;
    max-width:none;
  }
  .bento{grid-template-columns:1fr;}
  .cell,.cell--wide{grid-column:span 1;}
  .cta-box{grid-template-columns:1fr;}
  .cta-col + .cta-col{
    border-left:0;
    border-top:1px solid var(--edge-soft);
  }
  .qr{flex-direction:column;align-items:flex-start;}
  .hero-stats{gap:var(--s-3) var(--s-4);}
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .rv{opacity:1 !important;transform:none !important;}
  .cursor,.cursor-ring{display:none !important;}
  .slide{transition:none;}
}
@media (hover:none),(pointer:coarse){
  .cursor,.cursor-ring{display:none !important;}
}