/* ============================================
   Webflow 中文指南 · 视觉哲学：
   暖黑底 + 米白字 + 蓝紫×暖橙渐变点缀
   有意打破对称：错位标题、不规则圆角、手写下划线
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Serif+SC:wght@500;700;900&display=swap');

:root{
  --bg:#0F0E0C;
  --bg-tone:#15130F;
  --bg-light:#F5EFE6;
  --bg-light-2:#ECE3D4;
  --ink:#F4EFE6;
  --ink-dim:#A8A29E;
  --ink-dark:#1F1B17;
  --ink-dark-2:#3D362E;
  --accent:#E8623D;
  --accent-2:#F2A65A;
  --indigo:#4F46E5;
  --violet:#7C3AED;
  --line:rgba(244,239,230,.08);
  --line-dark:rgba(31,27,23,.08);
  --radius:18px;
  --radius-lg:28px;
  --shadow:0 30px 60px -30px rgba(0,0,0,.5);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Inter','PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  font-size:16px;
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none;transition:color .2s}
img{max-width:100%;display:block;height:auto}
ul,ol{list-style:none}

.container{
  max-width:1180px;
  margin:0 auto;
  padding:0 28px;
}

.skip-link{
  position:absolute;left:-9999px;top:0;
  background:var(--accent);color:#fff;padding:10px 16px;border-radius:6px;
}
.skip-link:focus{left:16px;top:16px;z-index:100}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:saturate(180%) blur(14px);
  background:rgba(15,14,12,.72);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 28px;
}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.02em}
.brand-mark{width:34px;height:34px;flex:0 0 auto;border-radius:8px;box-shadow:0 6px 18px rgba(79,70,229,.35)}
.brand-text{font-family:'Noto Serif SC',serif;font-size:18px}
.brand-text em{font-style:normal;color:var(--ink-dim);font-weight:500;margin-left:4px;font-size:13px}

.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:14px;color:var(--ink-dim);position:relative}
.nav-links a:not(.nav-cta):hover{color:var(--ink)}
.nav-links a:not(.nav-cta):hover::after{
  content:'';position:absolute;left:0;right:30%;bottom:-6px;height:2px;
  background:linear-gradient(90deg,var(--indigo),var(--accent));
  border-radius:2px;
  /* 故意右侧短一截，破坏对称 */
}
.nav-cta{
  background:linear-gradient(135deg,var(--indigo),var(--accent));
  color:#fff !important;padding:10px 18px;border-radius:999px;font-weight:600;
  box-shadow:0 10px 24px -8px rgba(232,98,61,.55);
}
.nav-cta:hover{transform:translateY(-1px)}

/* ===== Hero ===== */
.hero{
  position:relative;
  padding:80px 0 100px;
  overflow:hidden;
}
.hero-blob{
  position:absolute;
  width:680px;height:680px;
  right:-200px;top:-260px;
  background:radial-gradient(circle at 30% 30%, rgba(79,70,229,.45), transparent 60%),
             radial-gradient(circle at 70% 70%, rgba(232,98,61,.35), transparent 65%);
  filter:blur(40px);
  z-index:0;pointer-events:none;
}
.hero-inner{
  position:relative;z-index:1;
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap:60px;
  align-items:center;
}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--accent-2);
  border:1px solid rgba(242,166,90,.35);
  padding:6px 14px;border-radius:999px;
  margin-bottom:24px;
}

h1{
  font-family:'Noto Serif SC',serif;
  font-weight:900;
  font-size:clamp(38px,5.2vw,64px);
  line-height:1.15;
  letter-spacing:-.01em;
  margin-bottom:24px;
}
h1 .hl{
  background:linear-gradient(120deg,var(--indigo) 10%,var(--accent) 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  display:inline-block;
  position:relative;
  /* 手写下划线 */
}
h1 .hl::after{
  content:'';position:absolute;left:-4%;right:-2%;bottom:-6px;height:14px;
  background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 14'><path d='M2 9 Q 50 1 100 7 T 198 6' stroke='%23E8623D' stroke-width='3' fill='none' stroke-linecap='round'/></svg>") no-repeat center/100% 100%;
  opacity:.85;
}
.lede{
  color:var(--ink-dim);font-size:17px;max-width:560px;margin-bottom:32px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 26px;border-radius:999px;font-weight:600;font-size:15px;
  transition:transform .2s, box-shadow .2s, background .2s;
  cursor:pointer;border:0;
}
.btn-primary{
  background:linear-gradient(135deg,var(--indigo),var(--accent));
  color:#fff;
  box-shadow:0 16px 30px -10px rgba(232,98,61,.55);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 22px 34px -12px rgba(232,98,61,.6)}
.btn-ghost{
  background:transparent;color:var(--ink);
  border:1px solid var(--line);
}
.btn-ghost:hover{background:rgba(255,255,255,.04)}
.btn-lg{padding:16px 32px;font-size:16px}

.hero-meta{
  display:flex;gap:36px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:24px;
}
.hero-meta li strong{
  display:block;font-family:'Noto Serif SC',serif;font-size:30px;
  background:linear-gradient(120deg,var(--ink),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-meta li span{color:var(--ink-dim);font-size:13px}

/* ============ Hero · Webflow Designer 仿真 ============ */
.hero-art{
  position:relative;
  min-height:540px;
  perspective:1600px;
  perspective-origin:60% 40%;
}
.stage{
  position:relative;width:100%;
  transform:rotateY(-6deg) rotateX(3deg) rotate(.4deg);
  transform-style:preserve-3d;
  animation:stage-breathe 11s ease-in-out infinite;
}
@keyframes stage-breathe{
  0%,100%{transform:rotateY(-6deg) rotateX(3deg) rotate(.4deg) translateY(0)}
  50%   {transform:rotateY(-5.2deg) rotateX(2.5deg) rotate(.4deg) translateY(-4px)}
}

/* 背景光晕 */
.stage-glow{position:absolute;border-radius:50%;filter:blur(60px);pointer-events:none;z-index:0}
.stage-glow-a{width:340px;height:340px;left:-80px;top:-60px;
  background:radial-gradient(circle, rgba(79,70,229,.5), transparent 70%);
  animation:glow 7s ease-in-out infinite}
.stage-glow-b{width:380px;height:380px;right:-90px;bottom:-50px;
  background:radial-gradient(circle, rgba(232,98,61,.45), transparent 70%);
  animation:glow 9s ease-in-out infinite reverse}
@keyframes glow{
  0%,100%{opacity:.85;transform:scale(1)}
  50%   {opacity:1;transform:scale(1.08)}
}

/* === IDE 主体 === */
.ide{
  position:relative;z-index:2;
  background:#13131A;
  color:#E6E6EE;
  border-radius:14px;
  overflow:hidden;
  font-size:11px;line-height:1.4;
  font-family:'Inter','PingFang SC','Microsoft YaHei',sans-serif;
  border:1px solid rgba(255,255,255,.07);
  box-shadow:
    0 60px 100px -40px rgba(0,0,0,.7),
    0 24px 50px -20px rgba(79,70,229,.25),
    0 0 0 1px rgba(255,255,255,.03);
}

/* --- 顶部 toolbar --- */
.ide-top{
  display:flex;align-items:center;gap:10px;
  padding:8px 10px;
  background:#0E0E14;
  border-bottom:1px solid rgba(255,255,255,.06);
}
.ide-brand svg{width:22px;height:22px;border-radius:5px;display:block}
.ide-tabs{display:flex;gap:2px;background:#1B1B24;border-radius:6px;padding:2px}
.tab{
  padding:4px 10px;border-radius:4px;
  color:#7C7C8A;font-size:10.5px;cursor:default;
}
.tab.is-active{background:#2A2A38;color:#F4EFE6;box-shadow:0 1px 0 rgba(255,255,255,.05)}

.ide-devices{display:flex;gap:1px;margin-left:4px;color:#7C7C8A}
.dev{
  width:24px;height:22px;display:grid;place-items:center;border-radius:4px;
}
.dev svg{width:13px;height:13px}
.dev.is-active{background:rgba(79,70,229,.18);color:#A6A0FF}

.ide-spacer{flex:1}

.ide-collab{display:flex;align-items:center}
.avatar{
  width:20px;height:20px;border-radius:50%;
  display:grid;place-items:center;
  font-size:9px;font-weight:700;color:#fff;
  margin-left:-5px;border:1.5px solid #0E0E14;
}
.avatar.a1{background:linear-gradient(135deg,#7C3AED,#4F46E5)}
.avatar.a2{background:linear-gradient(135deg,#E8623D,#F2A65A)}
.avatar.a3{background:#2A2A38;color:#A8A29E;font-size:8px}

.ide-actions{display:flex;align-items:center;gap:4px;margin-left:8px}
.btn-mini{
  width:24px;height:24px;border-radius:5px;
  background:transparent;border:0;color:#7C7C8A;
  display:grid;place-items:center;cursor:default;
}
.btn-mini:hover{background:#1B1B24;color:#E6E6EE}
.btn-mini svg{width:13px;height:13px}
.btn-publish{
  position:relative;
  background:linear-gradient(135deg,#4F46E5,#E8623D);
  color:#fff;border:0;font-weight:600;font-size:11px;
  padding:5px 14px;border-radius:5px;cursor:default;
  box-shadow:0 4px 12px -4px rgba(232,98,61,.6);
}
.pulse-tip{
  position:absolute;top:-2px;right:-2px;
  width:7px;height:7px;border-radius:50%;
  background:#3DA68B;border:1.5px solid #0E0E14;
  box-shadow:0 0 0 0 rgba(61,166,139,.6);
  animation:dot-pulse 2s ease-out infinite;
}
@keyframes dot-pulse{
  0%  {box-shadow:0 0 0 0 rgba(61,166,139,.7)}
  100%{box-shadow:0 0 0 8px rgba(61,166,139,0)}
}

/* --- 主体三栏 --- */
.ide-main{
  display:grid;
  grid-template-columns: 36px 138px 1fr 156px;
  height:340px;
}

/* rail */
.ide-rail{
  background:#0E0E14;
  border-right:1px solid rgba(255,255,255,.05);
  display:flex;flex-direction:column;align-items:center;
  padding:8px 0;gap:2px;color:#5C5C6A;
}
.rail{
  width:26px;height:26px;display:grid;place-items:center;border-radius:5px;
}
.rail svg{width:14px;height:14px}
.rail.is-active{background:rgba(79,70,229,.18);color:#A6A0FF;box-shadow:inset 2px 0 0 #4F46E5}
.rail-ai{color:#F2A65A;margin-top:auto}
.rail-ai svg{filter:drop-shadow(0 0 4px rgba(242,166,90,.5))}

/* 图层 */
.ide-layers{
  background:#15151E;
  border-right:1px solid rgba(255,255,255,.05);
  padding:8px 6px;overflow:hidden;
}
.panel-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:2px 6px 6px;
  font-size:10px;color:#A8A29E;letter-spacing:.05em;font-weight:600;
}
.panel-head svg{width:11px;height:11px}
.panel-search{
  display:flex;align-items:center;gap:6px;
  background:#0E0E14;border:1px solid rgba(255,255,255,.05);
  padding:4px 8px;border-radius:5px;margin-bottom:6px;
  color:#5C5C6A;font-size:10px;
}
.panel-search svg{width:11px;height:11px;flex:0 0 11px}
.layer-tree{display:flex;flex-direction:column;gap:1px;font-size:10.5px}
.layer-tree li{
  display:flex;align-items:center;gap:4px;
  padding:3px 4px;border-radius:4px;
  color:#9C9CAA;cursor:default;white-space:nowrap;
}
.layer-tree .caret{width:8px;display:inline-block;font-size:8px;color:#5C5C6A;text-align:center}
.layer-tree .ico{
  width:12px;height:12px;display:grid;place-items:center;
  font-size:9px;color:#7C7C8A;
}
.layer-tree .ico.tag{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  font-size:8.5px;font-weight:700;
  background:#2A2A38;color:#A6A0FF;
  border-radius:2px;width:13px;height:13px;
}
.layer-tree .ico.tag.h{background:rgba(232,98,61,.2);color:#E8623D}
.layer-tree .ico.tag.p{background:rgba(124,58,237,.2);color:#A6A0FF}
.layer-tree .ico.tag.g{background:rgba(61,166,139,.2);color:#3DA68B}
.layer-tree .ico.tag.s{background:rgba(242,166,90,.2);color:#F2A65A}
.layer-tree .ico.tag.f{background:rgba(255,255,255,.06);color:#A8A29E}
.layer-tree li.lvl-1{padding-left:8px}
.layer-tree li.lvl-2{padding-left:16px}
.layer-tree li.lvl-3{padding-left:24px}
.layer-tree li.expanded{color:#E6E6EE}
.layer-tree li.selected{
  background:linear-gradient(90deg,rgba(79,70,229,.35),rgba(79,70,229,.05));
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(79,70,229,.5);
}
.layer-tree .lock{margin-left:auto;font-size:6px;color:#3DA68B;animation:dot-pulse 2.4s ease-out infinite}

/* canvas */
.ide-canvas{
  background:repeating-conic-gradient(#1A1A24 0 25%, #16161E 0 50%) 0 0/14px 14px;
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;
}
.canvas-bar{
  display:flex;align-items:center;gap:10px;
  padding:5px 10px;
  background:rgba(14,14,20,.7);
  backdrop-filter:blur(6px);
  border-bottom:1px solid rgba(255,255,255,.04);
  font-size:9.5px;color:#7C7C8A;letter-spacing:.03em;
  position:relative;z-index:3;
}
.canvas-bar .bp{color:#A6A0FF}
.canvas-bar .zoom{margin-left:auto}
.canvas-bar .grid-tip{display:grid;place-items:center;width:14px;height:14px;color:#7C7C8A}
.canvas-bar .grid-tip svg{width:11px;height:11px}

.canvas-wrap{
  position:relative;flex:1;
  display:grid;place-items:center;
  padding:14px;
}
.ruler{position:absolute;background:rgba(255,255,255,.025);z-index:1}
.ruler-h{left:0;right:0;top:0;height:14px;
  background-image:repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0 1px, transparent 1px 20px)}
.ruler-v{top:0;bottom:0;left:0;width:14px;
  background-image:repeating-linear-gradient(0deg, rgba(255,255,255,.08) 0 1px, transparent 1px 20px)}

.canvas-page{
  position:relative;
  width:100%;max-width:280px;
  border-radius:6px;overflow:visible;
  box-shadow:0 12px 30px -10px rgba(0,0,0,.55), 0 0 0 1px rgba(255,255,255,.06);
  background:#FBF7F0;
}
.canvas-page svg{display:block;width:100%;height:auto;border-radius:6px}

/* 选中框：H1 大致位于 SVG 内 (20,52)~(165,118) 区域，按 100% 比例换算 */
.sel-box{
  position:absolute;
  left:5%;top:14%;width:62%;height:23%;
  border:1.5px solid #4F46E5;
  pointer-events:none;
  z-index:4;
  animation:sel-blink 2.4s ease-in-out infinite;
}
@keyframes sel-blink{
  0%,100%{box-shadow:0 0 0 1px rgba(79,70,229,.0), 0 0 0 0 rgba(79,70,229,0)}
  50%   {box-shadow:0 0 0 1px rgba(79,70,229,.25), 0 0 12px 0 rgba(79,70,229,.4)}
}
.sel-tag{
  position:absolute;left:-1px;top:-19px;
  background:#4F46E5;color:#fff;
  font-size:9px;font-weight:600;
  padding:2px 6px;border-radius:3px 3px 3px 0;
  white-space:nowrap;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  letter-spacing:.02em;
}
.sel-handle{
  position:absolute;width:7px;height:7px;
  background:#fff;border:1.2px solid #4F46E5;border-radius:1px;
  z-index:5;
}
.sel-handle.h-tl{left:-4px;top:-4px}
.sel-handle.h-tr{right:-4px;top:-4px}
.sel-handle.h-bl{left:-4px;bottom:-4px}
.sel-handle.h-br{right:-4px;bottom:-4px}
.sel-handle.h-t{left:50%;top:-4px;margin-left:-3px}
.sel-handle.h-b{left:50%;bottom:-4px;margin-left:-3px}
.sel-handle.h-l{left:-4px;top:50%;margin-top:-3px}
.sel-handle.h-r{right:-4px;top:50%;margin-top:-3px}

/* hover 提示框：CTA 区 */
.hover-box{
  position:absolute;
  left:5%;bottom:5%;width:90%;height:16%;
  border:1px dashed rgba(232,98,61,.7);
  pointer-events:none;z-index:3;
}
.hover-tag{
  position:absolute;right:-1px;top:-17px;
  background:#E8623D;color:#fff;font-size:9px;
  padding:2px 6px;border-radius:3px 3px 0 3px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}

/* 协作者光标 */
.live-cursor{
  position:absolute;
  right:8%;top:32%;
  z-index:6;pointer-events:none;
  animation:cursor-drift 7s ease-in-out infinite;
}
.live-cursor svg{width:18px;height:18px;display:block;
  filter:drop-shadow(0 4px 6px rgba(0,0,0,.4))}
.live-name{
  display:inline-block;margin-top:2px;margin-left:10px;
  background:#7C3AED;color:#fff;
  font-size:9px;font-weight:600;
  padding:2px 6px;border-radius:3px;
  white-space:nowrap;
}
@keyframes cursor-drift{
  0%,100%{transform:translate(0,0)}
  35%   {transform:translate(-14px,8px)}
  65%   {transform:translate(8px,-10px)}
}

/* style 面板 */
.ide-style{
  background:#15151E;
  border-left:1px solid rgba(255,255,255,.05);
  padding:8px 8px 6px;overflow:hidden;
}
.style-class{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:8px;
  border-bottom:1px solid rgba(255,255,255,.05);margin-bottom:8px;
}
.cls-pill{
  background:linear-gradient(135deg,rgba(79,70,229,.3),rgba(232,98,61,.18));
  color:#fff;font-size:10px;font-weight:600;
  padding:2px 8px;border-radius:9px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.cls-meta{font-size:9px;color:#5C5C6A}
.style-tabs{
  display:flex;gap:1px;background:#0E0E14;border-radius:5px;padding:2px;margin-bottom:8px;
}
.st{
  flex:1;text-align:center;padding:3px 0;border-radius:3px;
  font-size:9.5px;color:#7C7C8A;cursor:default;
}
.st.is-active{background:#2A2A38;color:#F4EFE6}

.style-block{
  padding:6px 0;
  border-top:1px solid rgba(255,255,255,.04);
}
.style-block:first-of-type{border-top:0;padding-top:0}
.block-head{
  display:flex;align-items:center;justify-content:space-between;
  font-size:9.5px;color:#A8A29E;letter-spacing:.06em;
  text-transform:uppercase;font-weight:600;
  padding:2px 2px 6px;
}
.block-head .caret{font-size:7px;color:#5C5C6A}

.seg-row{display:flex;gap:2px;background:#0E0E14;padding:2px;border-radius:4px;margin-bottom:2px}
.seg{flex:1;text-align:center;padding:3px 0;border-radius:3px;font-size:9.5px;color:#7C7C8A;cursor:default}
.seg.is-on{background:#2A2A38;color:#F4EFE6;box-shadow:0 0 0 1px rgba(255,255,255,.04)}

.kv-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:3px 2px;font-size:10px;
}
.kv-row .k{color:#7C7C8A;font-size:9.5px}
.kv-row .v{
  display:inline-flex;align-items:baseline;gap:3px;
  background:#0E0E14;border:1px solid rgba(255,255,255,.05);
  padding:2px 6px;border-radius:3px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
  min-width:54px;justify-content:flex-end;
}
.kv-row .v em{font-style:normal;color:#F4EFE6;font-size:10px;font-weight:500}
.kv-row .v i{font-style:normal;color:#5C5C6A;font-size:9px}
.kv-row .v.wide{min-width:90px}
.kv-row .v.color{padding-left:3px}
.kv-row .v.color .chip{
  display:inline-block;width:11px;height:11px;border-radius:2px;
  background:#1F1B17;border:1px solid rgba(255,255,255,.15);
  margin-right:3px;
}
.kv-row.tight{padding-top:6px}

.grad-strip{
  height:18px;border-radius:4px;
  background:linear-gradient(120deg,#4F46E5,#7C3AED 45%,#E8623D);
  border:1px solid rgba(255,255,255,.08);
  margin:2px 2px 4px;position:relative;
}
.grad-strip::before,.grad-strip::after{
  content:'';position:absolute;top:50%;width:8px;height:8px;
  background:#fff;border-radius:50%;transform:translateY(-50%);
  box-shadow:0 0 0 2px rgba(0,0,0,.4);
}
.grad-strip::before{left:4px}
.grad-strip::after{right:4px}

/* 底部 breadcrumb */
.ide-bottom{
  display:flex;align-items:center;gap:5px;
  padding:5px 12px;
  background:#0E0E14;
  border-top:1px solid rgba(255,255,255,.05);
  font-size:9.5px;color:#7C7C8A;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.crumb{padding:1px 5px;border-radius:3px}
.crumb.is-active{background:rgba(79,70,229,.25);color:#fff}
.sep{color:#3a3a48}
.ide-status{margin-left:auto;display:flex;align-items:center;gap:5px;color:#5C5C6A}
.save-dot{
  width:6px;height:6px;border-radius:50%;background:#3DA68B;
  animation:dot-pulse 2s ease-out infinite;
}

/* AI 浮窗 */
.ide-ai-toast{
  position:absolute;
  right:14px;bottom:42px;
  width:230px;
  background:linear-gradient(160deg, rgba(35,28,55,.96), rgba(45,20,30,.96));
  border:1px solid rgba(242,166,90,.35);
  border-radius:10px;
  padding:10px 12px;
  box-shadow:
    0 24px 40px -16px rgba(0,0,0,.7),
    0 0 0 1px rgba(255,255,255,.04) inset,
    0 0 24px -6px rgba(232,98,61,.3);
  color:#F4EFE6;font-size:10.5px;line-height:1.45;
  z-index:7;
  animation:ai-in 8s ease-in-out infinite;
}
@keyframes ai-in{
  0%,8%,92%,100%{transform:translateY(8px) scale(.96);opacity:0}
  15%,85%       {transform:translateY(0) scale(1);opacity:1}
}
.ai-head{display:flex;align-items:center;gap:6px;margin-bottom:6px}
.ai-pip{
  width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,#F2A65A,#E8623D);
  box-shadow:0 0 8px rgba(242,166,90,.7);
}
.ai-head strong{font-size:10.5px;font-weight:700;letter-spacing:.02em}
.ai-time{margin-left:auto;font-size:9px;color:#7C7C8A;font-weight:500}
.ide-ai-toast p{margin:0 0 8px;color:#D8D2C2}
.ai-cta{display:flex;gap:6px}
.ai-btn{
  font-size:9.5px;padding:3px 9px;border-radius:4px;
  background:rgba(255,255,255,.06);color:#E6E6EE;
  cursor:default;font-weight:500;
}
.ai-btn-primary{background:linear-gradient(135deg,#4F46E5,#E8623D);color:#fff;font-weight:600}

/* ===== Sections ===== */
.section{padding:110px 0;position:relative}
.section-light{
  background:var(--bg-light);
  color:var(--ink-dark);
}
.section-light .kicker{color:var(--accent)}
.section-tone{
  background:var(--bg-tone);
}
.section-dark{
  background:var(--bg);
  background-image:
    radial-gradient(800px 400px at 80% -10%, rgba(79,70,229,.18), transparent 60%),
    radial-gradient(600px 360px at 0% 100%, rgba(232,98,61,.12), transparent 60%);
}
.kicker{
  display:inline-block;font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--accent-2);font-weight:600;margin-bottom:16px;
}
.kicker.center{display:block;text-align:center}
h2{
  font-family:'Noto Serif SC',serif;
  font-weight:700;
  font-size:clamp(28px,3.2vw,44px);
  line-height:1.25;
  letter-spacing:-.005em;
  margin-bottom:22px;
  max-width:820px;
}
h2.center{text-align:center;margin:0 auto 22px}
.hl-2{
  background:linear-gradient(120deg,var(--accent),var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.section-lede{
  color:inherit;opacity:.78;
  max-width:720px;font-size:17px;margin-bottom:48px;
}
.section-lede.center{margin:0 auto 56px;text-align:center}
h3{
  font-family:'Noto Serif SC',serif;
  font-size:22px;font-weight:700;line-height:1.4;
  margin-bottom:12px;letter-spacing:-.005em;
}
h4{
  font-family:'Noto Serif SC',serif;
  font-size:18px;font-weight:700;
  margin:28px 0 8px;color:var(--accent);
}
.section-light h4{color:var(--violet)}

p{margin-bottom:14px}
.section-light p{color:var(--ink-dark-2)}

/* two column */
.two-col, .two-col-rev{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:64px;align-items:center;
}
.two-col-rev{grid-template-columns: .9fr 1.1fr}

.frame{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow);
  /* 错位边框，故意非对称 */
  border-top:6px solid var(--accent);
  border-right:1px solid var(--line-dark);
  transform:rotate(1.5deg);
  background:#fff;
}
.section-light .frame img{display:block}
.frame figcaption{
  padding:14px 18px;
  font-size:13px;color:var(--ink-dark-2);
  background:#fff;text-align:center;
}
.frame-art{
  background:transparent;border:0;border-radius:0;box-shadow:none;
  transform:rotate(-1.5deg);
}
.frame-art figcaption{
  background:transparent;color:var(--ink-dim);text-align:left;padding:14px 0 0;
}

/* cards */
.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:24px;margin-top:24px;
}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border:1px solid var(--line);
  padding:34px 28px 30px;
  border-radius:var(--radius);
  position:relative;
  transition:transform .25s, border-color .25s, background .25s;
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(232,98,61,.35);
  background:linear-gradient(180deg, rgba(232,98,61,.06), rgba(79,70,229,.03));
}
.card-num{
  position:absolute;top:-14px;left:24px;
  background:var(--bg);color:var(--accent-2);
  border:1px solid var(--line);
  font-family:'Noto Serif SC',serif;font-size:14px;
  width:32px;height:32px;border-radius:50%;
  display:grid;place-items:center;
}
.card p{color:var(--ink-dim);font-size:15px;margin:0}
.card h3{margin-top:6px}
.card-accent{
  background:linear-gradient(135deg, rgba(79,70,229,.18), rgba(232,98,61,.12));
  border-color:rgba(232,98,61,.4);
}

/* audience */
.audience-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px 48px;margin-top:40px;
}
.audience-item{
  position:relative;
  padding-left:28px;
  border-left:2px solid var(--accent);
}
.audience-item:nth-child(2){border-color:var(--violet)}
.audience-item:nth-child(3){border-color:var(--indigo)}
.audience-item:nth-child(4){border-color:var(--accent-2)}
.audience-item h3{margin-bottom:10px}
.audience-item p{color:var(--ink-dark-2);margin:0}

/* steps */
.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;margin:50px 0 60px;
  counter-reset:step;
}
.steps li{
  background:rgba(255,255,255,.02);
  border:1px solid var(--line);
  padding:32px 26px;border-radius:var(--radius);
  position:relative;
}
.step-num{
  font-family:'Noto Serif SC',serif;font-size:48px;font-weight:900;
  background:linear-gradient(120deg,var(--indigo),var(--accent));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  display:block;margin-bottom:8px;line-height:1;
}
.steps p{color:var(--ink-dim);font-size:15px;margin:0}

/* CTA */
.cta{
  text-align:center;
  background:linear-gradient(135deg, rgba(79,70,229,.18), rgba(232,98,61,.18));
  border:1px solid rgba(232,98,61,.3);
  padding:60px 32px;border-radius:var(--radius-lg);
  margin-top:20px;
}
.cta h3{font-size:30px;margin-bottom:12px}
.cta p{color:var(--ink-dim);margin-bottom:28px;max-width:560px;margin-left:auto;margin-right:auto}

/* FAQ */
.faq h3{margin-top:32px;font-size:20px}
.faq h3:first-of-type{margin-top:24px}

/* Footer */
.site-footer{
  background:#0a0907;
  border-top:1px solid var(--line);
  padding:48px 0 36px;color:var(--ink-dim);font-size:14px;
}
.footer-inner{
  display:flex;flex-direction:column;gap:18px;align-items:flex-start;
}
.foot-brand{display:flex;gap:16px;align-items:flex-start;max-width:760px}
.foot-brand p{margin:0;line-height:1.6}
.foot-brand a{color:var(--accent-2);text-decoration:underline}
.foot-meta p{margin:0}

/* ===== Responsive ===== */
@media (max-width: 960px){
  .hero-inner,.two-col,.two-col-rev{grid-template-columns:1fr;gap:48px}
  .two-col-rev .frame-art{order:2}
  .cards{grid-template-columns:1fr 1fr}
  .audience-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-links .nav-cta{display:inline-flex}
  .nav-links{display:flex}
  .nav-links a:not(.nav-cta){display:none}
  .section{padding:80px 0}
  .hero{padding:50px 0 80px}
  /* 小屏：取消 3D，IDE 内部紧凑 */
  .hero-art{min-height:auto;perspective:none}
  .stage{transform:none;animation:none}
  .ide-main{grid-template-columns: 32px 120px 1fr 140px;height:300px}
}
@media (max-width: 560px){
  .cards{grid-template-columns:1fr}
  .hero-meta{gap:24px}
  .hero-meta li strong{font-size:24px}
  h1{font-size:38px}
  .container{padding:0 20px}
  /* 极小屏：藏掉左侧 rail+图层，只留画布+样式，保留产品感 */
  .ide-main{grid-template-columns: 1fr 130px;height:280px}
  .ide-rail,.ide-layers{display:none}
  .ide-tabs .tab:not(.is-active){display:none}
  .ide-collab .a3{display:none}
  .ide-ai-toast{display:none}
}