/* ============================================================
   Codex++ 官网 · 视觉样式
   深色底座 + 蓝紫极光 + 琥珀点缀（源自品牌云朵 logo）
   ============================================================ */

:root {
  --bg-0: #05060a;
  --bg-1: #0a0d16;
  --bg-2: #10141f;
  --panel: rgba(16, 20, 32, 0.72);
  --line: rgba(148, 163, 255, 0.14);
  --line-soft: rgba(148, 163, 255, 0.08);
  --txt-0: #f4f6ff;
  --txt-1: #c6cdea;
  --txt-2: #8b94b8;
  --indigo: #6d8bff;
  --violet: #9c86ff;
  --cyan: #6ee7f2;
  --amber: #e8b86d;
  --green: #66c8a0;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { overscroll-behavior-y: none; }

body {
  background: var(--bg-0);
  color: var(--txt-0);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(109, 139, 255, 0.35); color: #fff; }

.mono { font-family: var(--mono); letter-spacing: 0; }

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* 全局细颗粒，增加质感 */
body::after {
  content: "";
  position: fixed;
  inset: -50%;
  pointer-events: none;
  z-index: 90;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  animation: grain 9s steps(10) infinite;
}
@keyframes grain {
  0%,100% { transform: translate(0,0); } 10% { transform: translate(-3%,-6%); }
  30% { transform: translate(4%,2%); } 50% { transform: translate(-2%,5%); }
  70% { transform: translate(5%,-3%); } 90% { transform: translate(-4%,4%); }
}

/* ============ 通用 ============ */

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--txt-2);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-head {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 900;
  line-height: 1.25;
  margin: 18px 0 14px;
  letter-spacing: 0;
}
.section-head h2 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--indigo), var(--violet) 55%, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-sub {
  color: var(--txt-2);
  font-size: 15px;
  max-width: 640px;
  margin: 0 auto;
}
.section-head .eyebrow { justify-content: center; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 8px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out),
              background 0.25s, border-color 0.25s, color 0.25s;
  will-change: transform;
  white-space: nowrap;
}
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-lg { padding: 14px 26px; font-size: 15px; }
.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, #5d7bff, #8b6bff);
  box-shadow: 0 8px 30px rgba(104, 116, 255, 0.35), inset 0 1px 0 rgba(255,255,255,0.25);
}
.btn-primary:hover {
  box-shadow: 0 12px 44px rgba(124, 116, 255, 0.55), inset 0 1px 0 rgba(255,255,255,0.25);
  transform: translateY(-2px);
}
.btn-ghost {
  color: var(--txt-1);
  background: rgba(148, 163, 255, 0.07);
  border-color: var(--line);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { border-color: rgba(148, 163, 255, 0.4); color: #fff; transform: translateY(-2px); }

.pulse-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(102, 200, 160, 0.6);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(102,200,160,0.55); }
  70% { box-shadow: 0 0 0 9px rgba(102,200,160,0); }
  100% { box-shadow: 0 0 0 0 rgba(102,200,160,0); }
}

/* ============ 顶栏 ============ */

.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.site-nav.scrolled {
  background: rgba(6, 8, 13, 0.72);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom-color: var(--line-soft);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand-logo {
  width: 34px; height: 34px;
  border-radius: 9px;
  filter: drop-shadow(0 2px 10px rgba(109, 139, 255, 0.45));
}
.brand-name { font-weight: 900; font-size: 18px; letter-spacing: 0.01em; }
.brand-name b { color: var(--indigo); font-weight: 900; }
.nav-links { display: flex; gap: 26px; margin-left: 12px; }
.nav-links a {
  font-size: 14px;
  color: var(--txt-2);
  position: relative;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--indigo), var(--violet));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-out);
}
.nav-links a:hover { color: var(--txt-0); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-version {
  font-size: 11px;
  color: var(--txt-2);
  border: 1px solid var(--line);
  padding: 3px 9px;
  border-radius: 99px;
}

/* ============ Hero ============ */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; }
.hero-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.12);
  filter: saturate(0.9) brightness(0.62) contrast(1.05);
  will-change: transform;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  mix-blend-mode: screen;
}
.hero-vignette {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 50% 108%, rgba(5,6,10,0.94) 30%, rgba(5,6,10,0.25) 70%, transparent),
    radial-gradient(90% 70% at 12% 8%, rgba(5,6,10,0.75), transparent 60%),
    linear-gradient(180deg, rgba(5,6,10,0.62), rgba(5,6,10,0.2) 34%, rgba(5,6,10,0.86) 88%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(148,163,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,255,0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(75% 60% at 50% 42%, #000 30%, transparent 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1420px;
  width: 100%;
  margin: 0 auto;
  padding: 108px 28px 74px;
  display: grid;
  grid-template-columns: minmax(380px, 0.86fr) minmax(560px, 1.14fr);
  gap: clamp(34px, 4vw, 72px);
  align-items: center;
}
.hero-copy { min-width: 0; }

.hero-title {
  font-size: clamp(52px, 7.2vw, 96px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: 0;
  margin: 26px 0 24px;
}
.hero-title .line { display: block; overflow: hidden; }
.hero-title .w {
  display: inline-block;
  will-change: transform;
}
.hero-title .grad {
  background: linear-gradient(100deg, #8fa8ff 0%, #b49cff 45%, #7ee7f5 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 26px rgba(140, 130, 255, 0.35));
}
.hero-title .plus {
  background: linear-gradient(160deg, var(--amber), #ff8f6d);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-left: 0.06em;
  filter: drop-shadow(0 0 22px rgba(232, 184, 109, 0.4));
}

.hero-sub {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--txt-1);
  max-width: 560px;
}
.hero-sub .mono { font-size: 0.86em; color: var(--amber); }

.hero-cta { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: clamp(26px, 5vw, 72px);
  margin-top: 64px;
  flex-wrap: wrap;
}
.stat dt {
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 800;
  background: linear-gradient(180deg, #fff, #aab4e6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat dd { color: var(--txt-2); font-size: 13px; margin-top: 2px; }

.hero-manager {
  width: 100%;
  max-width: 780px;
  min-width: 0;
  justify-self: end;
}
.hero-manager-window {
  --manager-scale: 0.78;
  width: 100%;
  height: clamp(470px, 42vw, 620px);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 255, 0.28);
  border-radius: 18px;
  background: #080a10;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.58), 0 0 90px rgba(93, 107, 255, 0.14);
}
.hero-manager-window iframe {
  display: block;
  width: calc(100% / var(--manager-scale));
  height: calc(100% / var(--manager-scale));
  min-width: 760px;
  border: 0;
  transform: scale(var(--manager-scale));
  transform-origin: top left;
  background: #0a0c12;
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--txt-2);
}
.cue-ring {
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(10, 13, 22, 0.4);
  backdrop-filter: blur(6px);
  animation: cueFloat 2.4s var(--ease-out) infinite;
}
@keyframes cueFloat {
  0%,100% { transform: translateY(0); opacity: 0.9; }
  50% { transform: translateY(8px); opacity: 0.5; }
}

/* ============ 打字特效现场 ============ */

.demo {
  position: relative;
  padding: clamp(90px, 12vw, 160px) 24px;
  overflow: hidden;
}
.demo-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 46% at 50% 60%, rgba(93, 107, 255, 0.13), transparent 70%),
    radial-gradient(40% 30% at 82% 12%, rgba(126, 231, 245, 0.07), transparent 70%),
    var(--bg-0);
}
.demo .section-head { position: relative; z-index: 2; margin-bottom: 56px; }

.composer {
  position: relative;
  z-index: 2;
  max-width: 860px;
  margin: 0 auto;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(22, 27, 43, 0.92), rgba(13, 16, 26, 0.94));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255,255,255,0.03) inset,
              0 0 120px rgba(93, 107, 255, 0.12);
  transform-style: preserve-3d;
}
.composer-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.composer-title { margin-left: 10px; font-size: 11.5px; color: var(--txt-2); }
.composer-input {
  min-height: 132px;
  padding: 22px 22px 12px;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--txt-0);
  outline: none;
  caret-color: var(--indigo);
  cursor: text;
}
.composer-input:empty::before {
  content: attr(data-placeholder);
  color: rgba(139, 148, 184, 0.65);
}
.composer-foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px 14px;
}
.composer-foot .spacer { flex: 1; }
.chip {
  font-size: 12.5px;
  color: var(--txt-2);
  border: 1px solid var(--line-soft);
  border-radius: 99px;
  padding: 5px 12px;
  background: rgba(148, 163, 255, 0.05);
  user-select: none;
}
.chip-warn { color: #f0a05a; border-color: rgba(240, 160, 90, 0.25); background: rgba(240,160,90,0.07); }
.chip-model { color: var(--txt-1); }
.chip.send {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  padding: 0;
  color: #0a0d16;
  font-weight: 800;
  background: linear-gradient(120deg, #aeb9ff, #8fa1ff);
  border: none;
}

/* ============ 功能矩阵 ============ */

.features {
  position: relative;
  padding: clamp(90px, 12vw, 160px) 24px;
  background:
    radial-gradient(52% 36% at 8% 4%, rgba(156, 134, 255, 0.08), transparent 70%),
    radial-gradient(46% 34% at 96% 90%, rgba(109, 139, 255, 0.09), transparent 70%),
    var(--bg-1);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.features .section-head { margin-bottom: 64px; }

.feature-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.fcard {
  position: relative;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 26px 22px 24px;
  background: linear-gradient(180deg, rgba(20, 25, 40, 0.6), rgba(12, 15, 24, 0.6));
  overflow: hidden;
  transition: border-color 0.35s, background 0.35s, transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
  transform-style: preserve-3d;
}
.fcard::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(220px 160px at var(--mx, 50%) var(--my, -20%), rgba(124, 140, 255, 0.16), transparent 70%);
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.fcard:hover { border-color: rgba(148, 163, 255, 0.32); box-shadow: 0 18px 50px rgba(3, 4, 9, 0.55); }
.fcard:hover::before { opacity: 1; }
.fcard-no {
  font-size: 12px;
  color: var(--txt-2);
  letter-spacing: 0.2em;
}
.fcard h3 {
  font-size: 17.5px;
  font-weight: 800;
  margin: 14px 0 10px;
  letter-spacing: 0;
}
.fcard p { font-size: 13.5px; color: var(--txt-2); line-height: 1.85; }
.fcard p .mono { font-size: 0.85em; color: var(--amber); }

/* ============ 点选实拍：无 JS 时完整展示，初始化后单图预览 ============ */

.showcase {
  position: relative;
  padding: clamp(70px, 8vw, 110px) 24px;
  background: var(--bg-0);
}
.showcase-inner { max-width: 1180px; margin: 0 auto; }
.showcase .section-head { margin-bottom: 36px; }
.showcase-track {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px 24px;
}
.shot { min-width: 0; }
.shot-frame {
  border-radius: 12px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--bg-2);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  transition: box-shadow 0.5s var(--ease-out), border-color 0.4s;
}
.shot-frame img { width: 100%; height: auto; }
.shot-preview { display: block; cursor: zoom-in; }
.shot-preview:focus-visible { outline: 2px solid var(--cyan); outline-offset: 5px; }
.shot-dark { background: #0c0e14; }
.shot:hover .shot-frame {
  border-color: rgba(148, 163, 255, 0.4);
  box-shadow: 0 32px 110px rgba(0, 0, 0, 0.65), 0 0 90px rgba(93, 107, 255, 0.14);
}
.shot figcaption {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  row-gap: 4px;
  margin-top: 16px;
  padding: 0 4px;
}
.shot figcaption b { font-size: 16px; }
.shot figcaption span { color: var(--txt-2); font-size: 13px; }
.showcase.is-gallery .showcase-track { display: block; }
.showcase.is-gallery .shot[hidden] { display: none; }
.showcase.is-gallery .shot-frame {
  height: clamp(280px, 34vw, 440px);
  background: #080b12;
}
.showcase.is-gallery .shot-frame img { width: 100%; height: 100%; object-fit: contain; }
.showcase.is-gallery .shot figcaption { min-height: 80px; display: block; }
.showcase.is-gallery .shot figcaption b { display: block; margin-bottom: 4px; }
.showcase-thumbs { display: none; }
.showcase.is-gallery .showcase-thumbs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}
.showcase-thumb {
  appearance: none;
  min-width: 0;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg-1);
  color: var(--txt-2);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}
.showcase-thumb img { width: 100%; height: 58px; object-fit: contain; border-radius: 4px; background: #080b12; }
.showcase-thumb span { display: block; margin: 7px 2px 1px; font-size: 12.5px; line-height: 1.5; overflow-wrap: anywhere; }
.showcase-thumb:hover { border-color: var(--indigo); color: var(--txt-0); }
.showcase-thumb[aria-pressed="true"] { border-color: var(--cyan); background: rgba(110, 231, 242, 0.06); color: var(--txt-0); }
.showcase-thumb:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

/* ============ 供应商接入方式 ============ */

.modes {
  position: relative;
  padding: clamp(90px, 12vw, 160px) 24px;
  background:
    radial-gradient(50% 38% at 92% 6%, rgba(110, 231, 242, 0.06), transparent 70%),
    radial-gradient(46% 40% at 6% 96%, rgba(156, 134, 255, 0.08), transparent 70%),
    var(--bg-0);
  border-top: 1px solid var(--line-soft);
}
.modes .section-head { margin-bottom: 44px; }

.seg {
  position: relative;
  display: flex;
  gap: 4px;
  max-width: 640px;
  margin: 0 auto 34px;
  padding: 5px;
  border-radius: 99px;
  border: 1px solid var(--line);
  background: rgba(12, 15, 24, 0.72);
  backdrop-filter: blur(10px);
}
.seg-pill {
  position: absolute;
  top: 5px; left: 5px;
  height: calc(100% - 10px);
  width: 60px;
  border-radius: 99px;
  background: linear-gradient(120deg, #5d7bff, #8b6bff);
  box-shadow: 0 4px 18px rgba(104, 116, 255, 0.45);
  transition: transform 0.45s var(--ease-out), width 0.45s var(--ease-out);
  will-change: transform, width;
}
.seg-btn {
  position: relative;
  z-index: 1;
  flex: 1;
  border: none;
  background: none;
  color: var(--txt-2);
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 700;
  padding: 9px 6px;
  border-radius: 99px;
  cursor: pointer;
  transition: color 0.3s;
  white-space: nowrap;
}
.seg-btn:hover { color: var(--txt-1); }
.seg-btn.active { color: #fff; }

.mode-panel {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 30px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 34px 34px 30px;
  background: linear-gradient(180deg, rgba(20, 25, 40, 0.66), rgba(11, 14, 22, 0.78));
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}
.mode-copy h3 { font-size: 22px; font-weight: 900; margin-bottom: 10px; }
.mode-copy p { color: var(--txt-2); font-size: 14px; }
.mode-points { margin-top: 16px; list-style: none; }
.mode-points li {
  position: relative;
  padding-left: 20px;
  color: var(--txt-1);
  font-size: 13.5px;
  line-height: 2.1;
}
.mode-points li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72em;
  width: 7px; height: 7px;
  border-radius: 2px;
  background: linear-gradient(120deg, var(--indigo), var(--violet));
  transform: rotate(45deg);
}
.mode-route {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 26px 18px;
  border-radius: 10px;
  border: 1px dashed rgba(148, 163, 255, 0.22);
  background: rgba(8, 10, 17, 0.6);
  font-size: 12.5px;
}
.route-node {
  padding: 8px 13px;
  border-radius: 8px;
  border: 1px solid var(--line);
  color: var(--txt-1);
  background: rgba(20, 25, 40, 0.8);
  white-space: nowrap;
}
.route-node.route-you { color: #fff; border-color: rgba(148, 163, 255, 0.5); }
.route-node.route-hot {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(120deg, #5d7bff, #8b6bff);
  box-shadow: 0 6px 20px rgba(104, 116, 255, 0.4);
}
.route-link {
  width: 26px; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(148,163,255,0.15), rgba(148,163,255,0.6));
  position: relative;
  overflow: hidden;
}
.route-link::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, #fff, transparent);
  transform: translateX(-100%);
  animation: flow 2.2s linear infinite;
}
@keyframes flow { to { transform: translateX(100%); } }

/* ============ 快速上手 ============ */

.steps {
  position: relative;
  padding: clamp(90px, 12vw, 160px) 24px;
  background:
    radial-gradient(48% 36% at 10% 10%, rgba(102, 200, 160, 0.05), transparent 70%),
    var(--bg-1);
  border-top: 1px solid var(--line-soft);
}
.steps .section-head { margin-bottom: 56px; }
.steps-track {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
}
.step {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 28px 24px;
  background: linear-gradient(180deg, rgba(20, 25, 40, 0.6), rgba(12, 15, 24, 0.6));
  transition: border-color 0.35s, transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.step:hover { border-color: rgba(148, 163, 255, 0.32); box-shadow: 0 18px 50px rgba(3, 4, 9, 0.55); }
.step-no {
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(120deg, var(--indigo), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.step h3 { font-size: 17px; font-weight: 800; margin: 14px 0 10px; }
.step p { color: var(--txt-2); font-size: 13.5px; line-height: 1.9; }
.step p .mono { font-size: 0.85em; color: var(--amber); }
.step-arrow {
  align-self: center;
  color: var(--txt-2);
  font-size: 22px;
}
.steps-note {
  text-align: center;
  color: var(--txt-2);
  font-size: 13px;
  margin-top: 34px;
}

/* ============ 最新动态 ============ */

.whatsnew {
  position: relative;
  padding: clamp(90px, 12vw, 150px) 24px;
  background: var(--bg-0);
  border-top: 1px solid var(--line-soft);
}
.whatsnew .section-head { margin-bottom: 48px; }
.rel-list {
  max-width: 980px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  align-items: start;
}
.rel-card {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 22px 22px 18px;
  background: linear-gradient(180deg, rgba(20, 25, 40, 0.6), rgba(12, 15, 24, 0.6));
}
.rel-card.latest { border-color: rgba(232, 184, 109, 0.35); }
.rel-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--indigo);
}
.rel-card.latest .rel-tag { color: var(--amber); }
.rel-date { color: var(--txt-2); font-size: 12px; font-family: var(--mono); margin-top: 4px; }
.rel-card ul { margin: 14px 0 0; padding-left: 16px; }
.rel-card li {
  color: var(--txt-2);
  font-size: 12.5px;
  line-height: 1.8;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.rel-more {
  display: inline-block;
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--indigo);
  font-weight: 700;
}
.rel-empty { text-align: center; color: var(--txt-2); grid-column: 1 / -1; }

/* ============ FAQ ============ */

.faq {
  position: relative;
  padding: clamp(90px, 12vw, 150px) 24px;
  background: var(--bg-1);
  border-top: 1px solid var(--line-soft);
}
.faq .section-head { margin-bottom: 44px; }
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(20, 25, 40, 0.55), rgba(12, 15, 24, 0.55));
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item[open] { border-color: rgba(148, 163, 255, 0.35); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-weight: 700;
  font-size: 15px;
  transition: color 0.25s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--indigo); }
.faq-x {
  position: relative;
  width: 14px; height: 14px;
  flex-shrink: 0;
}
.faq-x::before, .faq-x::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--txt-2);
  transition: transform 0.35s var(--ease-out), background 0.25s;
}
.faq-x::before { width: 14px; height: 2px; }
.faq-x::after { width: 2px; height: 14px; }
.faq-item[open] .faq-x::after { transform: rotate(90deg); }
.faq-a { padding: 0 22px 20px; }
.faq-a p { color: var(--txt-2); font-size: 14px; line-height: 1.9; }
.faq-a .mono { font-size: 0.86em; color: var(--amber); }

/* ============ 社区与赞助 ============ */

.community {
  position: relative;
  padding: clamp(90px, 12vw, 160px) 24px;
  background:
    radial-gradient(50% 40% at 92% 4%, rgba(232, 184, 109, 0.05), transparent 70%),
    var(--bg-0);
  border-top: 1px solid var(--line-soft);
}
.community .section-head { margin-bottom: 44px; }
.comm-grid {
  max-width: 980px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.comm-card {
  position: relative;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 20px 18px;
  background: linear-gradient(180deg, rgba(20, 25, 40, 0.6), rgba(12, 15, 24, 0.6));
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.35s, transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.comm-card:hover { border-color: rgba(148, 163, 255, 0.4); box-shadow: 0 16px 44px rgba(3, 4, 9, 0.5); }
.comm-card b { font-size: 15px; }
.comm-card span { color: var(--txt-2); font-size: 12.5px; }
.comm-card i {
  position: absolute;
  top: 14px; right: 14px;
  font-style: normal;
  color: var(--txt-2);
  transition: color 0.3s, transform 0.35s var(--ease-out);
}
.comm-card:hover i { color: var(--indigo); transform: translate(2px, -2px); }

.sponsor-block { max-width: 980px; margin: 64px auto 0; }
.sponsor-head h3 { font-size: 20px; font-weight: 900; }
.sponsor-head p { color: var(--txt-2); font-size: 13.5px; margin-top: 6px; }
.sponsor-meta { display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; }
.sponsor-meta a { color: var(--indigo); font-size: 12.5px; }
[data-sponsor-status]:empty { display: none; }
#sponsorTop { margin-top: 22px; }
#sponsorTop:empty { display: none; }
.sponsor-banner {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 22px;
  align-items: center;
  border: 1px solid rgba(232, 184, 109, 0.3);
  border-radius: 12px;
  padding: 20px 24px;
  background:
    radial-gradient(70% 120% at 0% 50%, rgba(232, 184, 109, 0.08), transparent 70%),
    linear-gradient(180deg, rgba(20, 25, 40, 0.75), rgba(12, 15, 24, 0.75));
  transition: border-color 0.35s, box-shadow 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.sponsor-banner:hover {
  border-color: rgba(232, 184, 109, 0.55);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 70px rgba(232, 184, 109, 0.1);
  transform: translateY(-2px);
}
.sponsor-banner img {
  width: 100%;
  height: 130px;
  max-height: 130px;
  object-fit: contain;
  border-radius: 8px;
}
.sponsor-banner .sponsor-copy h4 { font-size: 17px; }
.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 14px;
}
.sponsor-grid:empty { display: none; }
.sponsor-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  padding: 16px 18px;
  background: linear-gradient(180deg, rgba(20, 25, 40, 0.55), rgba(12, 15, 24, 0.55));
  transition: border-color 0.35s, transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.sponsor-card:hover { border-color: rgba(148, 163, 255, 0.4); box-shadow: 0 14px 40px rgba(3, 4, 9, 0.5); transform: translateY(-2px); }
.sponsor-card img {
  width: 64px;
  height: 40px;
  object-fit: contain;
  border-radius: 6px;
  flex-shrink: 0;
  margin-top: 2px;
}
.sponsor-copy h4 { font-size: 14.5px; color: var(--txt-0); }
.sponsor-copy p {
  color: var(--txt-2);
  font-size: 12.5px;
  line-height: 1.75;
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sponsor-highlights { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.sponsor-highlights li {
  font-size: 11px;
  color: var(--txt-1);
  border: 1px solid var(--line-soft);
  border-radius: 99px;
  padding: 2px 9px;
  background: rgba(148, 163, 255, 0.05);
  white-space: nowrap;
}
.sponsor-mark {
  display: grid;
  place-items: center;
  width: 64px; height: 40px;
  border-radius: 6px;
  background: linear-gradient(120deg, #2a3355, #3a2f5f);
  color: #cdd6ff;
  font-weight: 800;
  flex-shrink: 0;
}
.sponsor-banner .sponsor-mark { width: 100%; height: 130px; font-size: 34px; }
.sponsor-contact { text-align: center; color: var(--txt-2); font-size: 13px; margin-top: 30px; }
.sponsor-contact a { color: var(--indigo); }

/* ============ 上下文窗口 ============ */

.context {
  position: relative;
  padding: clamp(90px, 12vw, 170px) 24px;
  background:
    radial-gradient(48% 40% at 90% 8%, rgba(232, 184, 109, 0.06), transparent 70%),
    radial-gradient(55% 45% at 4% 92%, rgba(109, 139, 255, 0.1), transparent 70%),
    var(--bg-1);
  border-top: 1px solid var(--line-soft);
}
.context .section-head { margin-bottom: 60px; }
.context-cols {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 40px;
  align-items: center;
}

.term {
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #0d1019, #090b12);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6), 0 0 100px rgba(93, 107, 255, 0.1);
  overflow: hidden;
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(148, 163, 255, 0.03);
}
.term-title { margin-left: 10px; font-size: 11.5px; color: var(--txt-2); }
.term-body {
  padding: 24px 24px 8px;
  font-size: 15px;
  line-height: 2.05;
  color: #d6dcf5;
  min-height: 240px;
  white-space: pre-wrap;
}
.t-cm { color: #5d6684; }
.t-hl {
  color: var(--amber);
  background: rgba(232, 184, 109, 0.12);
  border-radius: 4px;
  padding: 1px 3px;
}
.term-out {
  padding: 12px 24px 18px;
  font-size: 12.5px;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.term-out.show { opacity: 1; transform: none; }
.t-ok { color: var(--green); font-weight: 600; }
.t-dim { color: #5d6684; }
.caret {
  display: inline-block;
  width: 8px; height: 1.1em;
  background: var(--indigo);
  vertical-align: text-bottom;
  animation: blink 0.9s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.bars { display: flex; flex-direction: column; gap: 22px; }
.bar-row {
  display: grid;
  grid-template-columns: 168px 1fr 56px;
  align-items: center;
  gap: 14px;
}
.bar-label { font-size: 13px; color: var(--txt-1); text-align: right; }
.bar-track {
  height: 12px;
  border-radius: 99px;
  background: rgba(148, 163, 255, 0.08);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--indigo), var(--violet));
  box-shadow: 0 0 18px rgba(124, 140, 255, 0.5);
}
.bar-row.hot .bar-fill {
  background: linear-gradient(90deg, var(--amber), #ff8f6d 60%, var(--violet));
  box-shadow: 0 0 22px rgba(232, 184, 109, 0.5);
}
.bar-val { font-size: 14px; font-weight: 600; color: var(--txt-0); }
.bar-row.hot .bar-val { color: var(--amber); }
.bars-note { color: var(--txt-2); font-size: 13px; margin-top: 6px; }

/* ============ CTA ============ */

.cta {
  position: relative;
  padding: clamp(110px, 15vw, 200px) 24px;
  overflow: hidden;
  text-align: center;
  border-top: 1px solid var(--line-soft);
}
.cta-bg { position: absolute; inset: 0; }
.cta-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  filter: saturate(0.75) brightness(0.55) contrast(1.08);
}
.cta-shade {
  position: absolute; inset: 0;
  background:
    radial-gradient(90% 80% at 50% 50%, rgba(5, 6, 10, 0.5), rgba(5, 6, 10, 0.94)),
    linear-gradient(180deg, rgba(5,6,10,0.9), rgba(5,6,10,0.55) 40%, rgba(5,6,10,0.94));
}
.cta-inner { position: relative; z-index: 2; max-width: 900px; margin: 0 auto; }
.cta-inner h2 {
  font-size: clamp(34px, 5.4vw, 62px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.2;
}
.cta-inner h2 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--amber), #ff9d7a 50%, var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cta-sub { color: var(--txt-1); margin: 18px 0 44px; font-size: 15.5px; }

.dl-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: 720px;
  margin: 0 auto;
}
.dl-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 30px 22px 24px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(12, 15, 24, 0.72);
  backdrop-filter: blur(14px);
  color: var(--txt-1);
  transition: border-color 0.35s, transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out), color 0.3s;
  transform-style: preserve-3d;
}
.dl-card svg { color: var(--indigo); }
.dl-card b { font-size: 17px; color: var(--txt-0); }
.dl-card .mono { font-size: 12px; color: var(--txt-2); }
.dl-card i { font-style: normal; font-size: 13.5px; font-weight: 700; color: var(--indigo); margin-top: 6px; }
.dl-card:hover {
  border-color: rgba(148, 163, 255, 0.45);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.6), 0 0 80px rgba(93, 107, 255, 0.16);
  color: var(--txt-1);
}
.cta-note { margin-top: 30px; color: var(--txt-2); font-size: 13px; }

/* ============ 页脚 ============ */

.site-footer {
  border-top: 1px solid var(--line-soft);
  background: var(--bg-0);
  padding: 56px 24px 34px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 36px;
  flex-wrap: wrap;
}
.footer-brand { display: flex; gap: 14px; align-items: flex-start; }
.footer-brand .brand-logo { width: 42px; height: 42px; border-radius: 11px; }
.footer-brand b { font-size: 17px; }
.footer-brand p { color: var(--txt-2); font-size: 13px; margin-top: 5px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { color: var(--txt-2); font-size: 13.5px; transition: color 0.25s; }
.footer-links a:hover { color: var(--txt-0); }
.footer-fine {
  max-width: 1280px;
  margin: 34px auto 0;
  color: #4d5570;
  font-size: 12px;
}

/* ============ 打字特效层 ============ */

#fx {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
}

/* ============ 入场基态（JS 接管前隐藏，避免闪烁） ============ */

.reveal { opacity: 0; transform: translateY(26px); }
.hero-title .w { transform: translateY(110%); }
body.no-anim .reveal, body.no-anim .hero-title .w { opacity: 1; transform: none; }
body.no-anim .term-out { opacity: 1; transform: none; }
body.no-anim .bar-fill { transition: none; }

/* ============ 响应式 ============ */

@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 42px; }
  .hero-manager { max-width: 900px; justify-self: center; }
  .hero-manager-window { --manager-scale: 0.88; height: 620px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .context-cols { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .mode-panel { grid-template-columns: 1fr; }
  .steps-track { grid-template-columns: 1fr; }
  .step-arrow { transform: rotate(90deg); justify-self: center; }
  .comm-grid { grid-template-columns: repeat(2, 1fr); }
  .rel-list { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav-version { display: none; }
  .hero-inner { padding-top: 104px; padding-left: 20px; padding-right: 20px; }
  .hero-title { font-size: clamp(48px, 15vw, 76px); }
  .hero-manager-window { --manager-scale: 0.7; height: 540px; }
  .hero-stats { gap: 22px 34px; }
  .feature-grid { grid-template-columns: 1fr; }
  .showcase { padding-right: 20px; padding-left: 20px; }
  .showcase-track { grid-template-columns: 1fr; }
  .showcase.is-gallery .shot-frame { height: clamp(210px, 65vw, 320px); }
  .showcase.is-gallery .shot figcaption { min-height: 104px; }
  .showcase.is-gallery .showcase-thumbs { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .dl-cards { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 118px 1fr 50px; }
  .bar-label { font-size: 11.5px; }
  .composer-input { min-height: 104px; font-size: 15px; }
  .seg { flex-wrap: wrap; border-radius: 16px; }
  .seg-btn { flex: 1 1 40%; }
  .seg-pill { display: none; }
  .seg-btn.active { background: linear-gradient(120deg, #5d7bff, #8b6bff); color: #fff; }
  .comm-grid { grid-template-columns: 1fr; }
  .sponsor-grid { grid-template-columns: 1fr; }
  .sponsor-banner { grid-template-columns: 1fr; }
  .mode-panel { padding: 24px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}