/* ============================================================
   FusionAI · 企业级数字员工平台
   主题取自产品与设计稿：靛蓝 #667EEA / 深靛 #4C5FD9 / 紫 #764BA2
   ============================================================ */

:root {
  --bg: #F5F7FB;
  --bg-2: #EDF1F9;
  --panel: #FFFFFF;
  --ink: #242A3A;
  --ink-2: #5B6478;
  --muted: #8A93A6;
  --line: rgba(102, 126, 234, .16);
  --line-strong: rgba(102, 126, 234, .32);
  --accent: #667EEA;
  --accent-deep: #4C5FD9;
  --signal: #764BA2;
  --gold: #FAAD14;
  --ok: #2FA37A;
  --risk: #D9534F;
  --gradient: linear-gradient(135deg, #4C5FD9 0%, #667EEA 46%, #764BA2 100%);
  --shadow-sm: 0 1px 2px rgba(36, 42, 58, .04), 0 6px 18px -8px rgba(36, 42, 58, .10);
  --shadow-md: 0 2px 6px rgba(36, 42, 58, .05), 0 24px 50px -24px rgba(60, 70, 130, .30);
  --shadow-lg: 0 30px 70px -30px rgba(50, 60, 120, .45);
  --radius: 16px;
  --max: clamp(1240px, 88vw, 1680px);
  --pad: clamp(20px, 4vw, 48px);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; letter-spacing: -.015em; font-weight: 700; }
p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; list-style: none; }
em { font-style: normal; }
code {
  font-family: var(--mono);
  font-size: .88em;
  padding: .12em .42em;
  border-radius: 5px;
  background: rgba(102, 126, 234, .10);
  color: var(--accent-deep);
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: var(--pad);
}

/* ---------- 通用元件 ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.eyebrow .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, .14);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 10px 26px -12px rgba(76, 95, 217, .75);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 32px -14px rgba(76, 95, 217, .8); }
.btn-ghost {
  background: rgba(255, 255, 255, .7);
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover { background: #fff; border-color: var(--accent); }
.btn-sm { padding: 9px 18px; font-size: 13.5px; }
.btn-light { background: #fff; color: var(--accent-deep); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -14px rgba(0, 0, 0, .4); }
.btn-outline-light {
  background: rgba(255, 255, 255, .10);
  border-color: rgba(255, 255, 255, .48);
  color: #fff;
}
.btn-outline-light:hover { background: rgba(255, 255, 255, .2); }

/* ---------- 导航 ---------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(245, 247, 251, .72);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.nav.is-scrolled {
  background: rgba(247, 249, 252, .92);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px -18px rgba(36, 42, 58, .5);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  height: 72px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-logo { height: 30px; width: auto; }
.brand-sub {
  font-size: 12px;
  color: var(--muted);
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
  white-space: nowrap;
}
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--ink-2);
  transition: color .15s ease, background .15s ease;
}
.nav-links a:hover { color: var(--accent-deep); background: rgba(102, 126, 234, .08); }
.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  padding: 0;
  place-items: center;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 16px; height: 1.6px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}

/* ---------- HERO ---------- */

.hero {
  position: relative;
  padding: clamp(120px, 12vw, 168px) 0 clamp(64px, 7vw, 104px);
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(102, 126, 234, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 126, 234, .06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, #000 30%, transparent 78%);
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .5;
}
.orb-a { width: 480px; height: 480px; top: -160px; right: -80px; background: rgba(102, 126, 234, .42); }
.orb-b { width: 420px; height: 420px; bottom: -220px; left: -120px; background: rgba(118, 75, 162, .26); }

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.hero-copy h1 {
  margin-top: 20px;
  font-size: clamp(38px, 5.2vw, 66px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.035em;
}
.hero-copy h1 em {
  background: linear-gradient(115deg, #4C5FD9 10%, #667EEA 55%, #764BA2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  margin-top: 24px;
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink);
}
.hero-sub {
  margin-top: 14px;
  max-width: 30em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-2);
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.hero-stats > div { padding-right: 26px; margin-right: 26px; border-right: 1px solid var(--line); }
.hero-stats > div:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.hero-stats dt {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent-deep);
  letter-spacing: -.02em;
}
.hero-stats dd { margin-top: 7px; font-size: 12.5px; color: var(--muted); }

.hero-shot { margin: 0; }
.browser {
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: #F7F9FE;
  border-bottom: 1px solid var(--line);
}
.browser-bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(102, 126, 234, .28); }
.browser-bar span {
  margin-left: 10px;
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: .02em;
}
.hero-shot figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 2px;
}

/* ---------- 章节通用 ---------- */

.section { padding: clamp(72px, 8.5vw, 120px) 0; }
.section-alt {
  background: var(--bg-2);
  border-block: 1px solid rgba(102, 126, 234, .10);
}
.sec-head {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) minmax(260px, 360px);
  gap: clamp(16px, 3vw, 40px);
  align-items: start;
  margin-bottom: clamp(36px, 4.5vw, 60px);
}
.sec-no {
  font-family: var(--mono);
  font-size: clamp(40px, 4.4vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1.2px rgba(102, 126, 234, .42);
}
.sec-head h2 {
  margin-top: 12px;
  font-size: clamp(28px, 3.3vw, 44px);
  font-weight: 750;
  letter-spacing: -.03em;
}
.sec-head h2 em { color: var(--accent-deep); }
.sec-aside {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
  padding-top: 6px;
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}

/* ---------- 01 定位 ---------- */

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 52px);
  margin-bottom: clamp(36px, 4vw, 52px);
}
.prose { font-size: 16px; line-height: 1.95; color: var(--ink-2); }
.prose:first-child::first-letter {
  float: left;
  font-size: 46px;
  line-height: .9;
  padding: 6px 10px 0 0;
  font-weight: 800;
  color: var(--accent-deep);
}

.barrier-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
  margin-bottom: clamp(36px, 4vw, 52px);
}
.barrier {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(22px, 2.4vw, 30px);
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--accent);
  transition: transform .2s ease, box-shadow .2s ease;
}
.barrier:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.barrier-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--muted);
}
.barrier h3 { margin-top: 10px; font-size: 22px; }
.barrier .q {
  margin-top: 12px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--accent-deep);
}
.barrier p:last-child { margin-top: 10px; font-size: 14px; line-height: 1.85; color: var(--ink-2); }

.definition {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background:
    radial-gradient(ellipse 80% 120% at 100% 0%, rgba(118, 75, 162, .08), transparent 60%),
    linear-gradient(135deg, #fff 0%, #EEF1FD 100%);
  margin-bottom: clamp(36px, 4vw, 52px);
}
.definition-lead h3 {
  margin-top: 12px;
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.35;
}
.definition-lead h3 em { color: var(--accent-deep); }
.definition > p { font-size: 15px; line-height: 1.95; color: var(--ink-2); }

.principles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 clamp(28px, 5vw, 64px);
}
.principles li {
  position: relative;
  padding: 26px 0 26px 54px;
  border-top: 1px solid var(--line);
}
.p-no {
  position: absolute;
  left: 0; top: 28px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .06em;
}
.principles h4 { font-size: 17.5px; }
.principles p { margin-top: 8px; font-size: 14px; line-height: 1.85; color: var(--ink-2); }

/* ---------- 02 能力 ---------- */

.capability-map {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-block: 1px solid var(--line-strong);
  margin-bottom: clamp(28px, 3.4vw, 44px);
}
.map-col { padding: 20px 22px 20px 0; }
.map-col + .map-col { padding-left: 22px; border-left: 1px solid var(--line); }
.map-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 700;
}
.map-head span {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--muted);
}
.map-chips { margin-top: 8px; font-size: 13px; line-height: 1.8; color: var(--ink-2); }

.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 1.8vw, 22px);
}
.cap {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 22px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.cap:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--line-strong); }
.cap-icon {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: rgba(102, 126, 234, .10);
  color: var(--accent-deep);
}
.cap-icon svg {
  width: 21px; height: 21px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.cap-no {
  position: absolute;
  top: 26px; right: 22px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .08em;
}
.cap h3 { margin-top: 16px; font-size: 17px; letter-spacing: -.01em; }
.cap h3 span {
  display: block;
  margin-top: 4px;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--muted);
}
.cap p:not(.cap-tags) { margin-top: 10px; font-size: 13.5px; line-height: 1.8; color: var(--ink-2); }
.cap-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.cap-tags b {
  font-size: 10.5px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 5px;
  background: rgba(102, 126, 234, .09);
  color: var(--accent-deep);
}

/* ---------- 03 治理 ---------- */

.gates {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 26px);
  margin-bottom: clamp(40px, 5vw, 64px);
}
.gates li {
  position: relative;
  padding: 22px 22px 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
}
.gates li::after {
  content: "→";
  position: absolute;
  right: -17px; top: 26px;
  width: 20px;
  text-align: center;
  color: var(--line-strong);
  font-size: 15px;
  z-index: 1;
}
.gates li:last-child::after { display: none; }
.gate-n {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--accent);
  font-weight: 600;
}
.gates h3 { margin-top: 8px; font-size: 21px; }
.gates p { margin-top: 10px; font-size: 13.5px; line-height: 1.85; color: var(--ink-2); }

.approval {
  display: grid;
  grid-template-columns: minmax(0, .62fr) minmax(0, 1.38fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}
.approval-shot { margin: 0; justify-self: center; width: 100%; max-width: 420px; }
.approval-shot img {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  background: #fff;
}
.approval-shot figcaption { margin-top: 12px; font-size: 12.5px; color: var(--muted); }
.approval-copy h3 { margin-top: 12px; font-size: clamp(24px, 2.6vw, 34px); line-height: 1.3; }
.approval-copy h3 em { color: var(--accent-deep); }
.approval-copy > p:not(.eyebrow) { margin-top: 16px; font-size: 15px; line-height: 1.9; color: var(--ink-2); }
.ticks { margin-top: 20px; display: grid; gap: 11px; }
.ticks li {
  position: relative;
  padding-left: 26px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}
.ticks li::before {
  content: "";
  position: absolute;
  left: 0; top: .38em;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: rgba(47, 163, 122, .12);
}
.ticks li::after {
  content: "";
  position: absolute;
  left: 4.5px; top: .72em;
  width: 6px; height: 3.4px;
  border-left: 1.6px solid var(--ok);
  border-bottom: 1.6px solid var(--ok);
  transform: rotate(-45deg);
}

/* ---------- 04 界面 ---------- */

.tabs {
  display: inline-flex;
  gap: 4px;
  padding: 5px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}
.tab {
  border: 0;
  background: transparent;
  padding: 9px 20px;
  border-radius: 999px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  cursor: pointer;
  transition: background .18s ease, color .18s ease;
}
.tab:hover { color: var(--accent-deep); }
.tab.is-active { background: var(--gradient); color: #fff; }
.tab-panel { margin: 0; }
.tab-panel[hidden] { display: none; }
.tab-panel img {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  background: #fff;
}
.tab-panel figcaption {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-2);
  max-width: 52em;
}
.tab-panel figcaption b { color: var(--ink); }

/* ---------- 05 场景 ---------- */

.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}
.scene {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
  display: flex;
  flex-direction: column;
}
.scene:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.scene-shot { background: #EEF1F8; border-bottom: 1px solid var(--line); }
.scene-shot img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top center;
}
.scene-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.scene-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: .06em;
}
.scene-meta span {
  font-weight: 700;
  color: var(--accent-deep);
  background: rgba(102, 126, 234, .10);
  padding: 1px 7px;
  border-radius: 5px;
}
.scene h3 { margin-top: 8px; font-size: 17.5px; }
.scene p:not(.scene-meta):not(.scene-tags) {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-2);
}
.scene-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 14px; }
.scene-tags b {
  font-size: 10.5px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 5px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  background: var(--bg);
}

/* ---------- 06 架构 ---------- */

.layers {
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.layer {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding: 18px 24px;
}
.layer + .layer { border-top: 1px solid var(--line); }
.layer-name { display: flex; flex-direction: column; gap: 2px; }
.layer-name b { font-size: 15px; }
.layer-name span {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .16em;
  color: var(--muted);
}
.layer-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.layer-chips span {
  font-size: 12.5px;
  padding: 5px 11px;
  border-radius: 7px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  background: #FBFCFE;
}
.layer-hl {
  background: linear-gradient(90deg, rgba(102, 126, 234, .10), rgba(118, 75, 162, .05));
}
.layer-hl .layer-chips span { border-color: var(--line-strong); background: rgba(255, 255, 255, .85); }
.layer-gov { background: rgba(250, 173, 20, .05); }
.layer-gov .layer-name b { color: #9A6800; }
.layer-gov .layer-chips span { border-color: rgba(250, 173, 20, .28); background: rgba(255, 255, 255, .85); }

.path {
  margin-top: clamp(32px, 4vw, 48px);
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}
.path-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 19px;
  font-weight: 700;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.path-head span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--muted);
  font-weight: 600;
}
.path-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 32px;
  margin-top: 22px;
}
.path-steps li { position: relative; padding-left: 38px; }
.path-steps li > span {
  position: absolute;
  left: 0; top: 1px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}
.path-steps b { font-size: 15px; }
.path-steps p { margin-top: 5px; font-size: 13px; line-height: 1.75; color: var(--ink-2); }

/* ---------- 07 对比 ---------- */

.versus {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(16px, 2vw, 24px);
  margin-bottom: clamp(32px, 4vw, 44px);
}
.vs-card {
  padding: clamp(24px, 2.8vw, 34px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}
.vs-card-hl {
  border-color: var(--line-strong);
  background:
    radial-gradient(ellipse 90% 120% at 100% 0%, rgba(102, 126, 234, .10), transparent 62%),
    #fff;
  box-shadow: var(--shadow-md);
}
.vs-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--muted);
}
.vs-card-hl .vs-tag { color: var(--accent-deep); }
.vs-card h3 { margin-top: 12px; font-size: 24px; }
.vs-sub { margin-top: 6px; font-size: 12.5px; color: var(--muted); }
.vs-card > p:last-child { margin-top: 16px; font-size: 14px; line-height: 1.9; color: var(--ink-2); }

.vs-points {
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}
.vs-points h3 { font-size: 20px; }
.vs-points ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 40px;
  margin-top: 20px;
}
.vs-points li { padding-left: 18px; border-left: 2px solid var(--accent); }
.vs-points b { display: block; font-size: 15px; }
.vs-points span { display: block; margin-top: 4px; font-size: 13.5px; line-height: 1.8; color: var(--ink-2); }
.vs-note {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* ---------- 08 交付 ---------- */

.delivery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(12px, 1.6vw, 20px);
  margin-bottom: clamp(36px, 4.5vw, 56px);
}
.d-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
}
.d-card h3 { font-size: 15.5px; }
.d-card p { margin-top: 8px; font-size: 13px; line-height: 1.8; color: var(--ink-2); }

.phases {
  padding: clamp(24px, 3vw, 36px);
  border-radius: 18px;
  background:
    radial-gradient(ellipse 70% 120% at 0% 0%, rgba(102, 126, 234, .09), transparent 60%),
    #fff;
  border: 1px solid var(--line-strong);
}
.phases-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 19px;
  font-weight: 700;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.phases-head span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--muted);
  font-weight: 600;
}
.phases ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 32px;
  margin-top: 22px;
}
.phase-no {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--accent);
  font-weight: 600;
}
.phases h3 { margin-top: 6px; font-size: 18px; }
.phases p { margin-top: 6px; font-size: 13.5px; line-height: 1.85; color: var(--ink-2); }

/* ---------- CTA ---------- */

.section.cta { padding-bottom: clamp(72px, 8vw, 112px); }
.cta-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  padding: clamp(32px, 5vw, 64px);
  border-radius: 24px;
  background: var(--gradient);
  color: #fff;
  overflow: hidden;
  box-shadow: 0 40px 80px -40px rgba(76, 95, 217, .7);
}
.cta-panel::after {
  content: "";
  position: absolute;
  width: 460px; height: 460px;
  right: -160px; top: -220px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .12);
  pointer-events: none;
}
.cta-copy { position: relative; z-index: 1; }
.cta-copy .eyebrow { color: rgba(255, 255, 255, .78); }
.cta-copy h2 {
  margin-top: 14px;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.32;
  color: #fff;
}
.cta-copy > p:not(.eyebrow) {
  margin-top: 16px;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255, 255, 255, .86);
}
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.cta-card {
  position: relative;
  z-index: 1;
  padding: 24px;
  border-radius: 16px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .40);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.cta-card-head { font-size: 13px; color: rgba(255, 255, 255, .82); line-height: 1.7; }
.cta-card dl { margin-top: 16px; display: grid; gap: 12px; }
.cta-card dl > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, .22);
}
.cta-card dl > div:last-child { border-bottom: 0; padding-bottom: 0; }
.cta-card dt { font-size: 12.5px; color: rgba(255, 255, 255, .72); }
.cta-card dd { font-family: var(--mono); font-size: 17px; font-weight: 700; letter-spacing: .01em; }
.cta-note { margin-top: 16px; font-size: 12px; line-height: 1.75; color: rgba(255, 255, 255, .72); }

/* ---------- 页脚 ---------- */

.footer {
  border-top: 1px solid var(--line);
  background: #F0F3FA;
  padding: 44px 0 36px;
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px 40px;
  align-items: center;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-logo { height: 26px; width: auto; }
.footer-brand > span {
  font-size: 12px;
  color: var(--muted);
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
}
.footer-links { display: flex; flex-wrap: wrap; gap: 4px 18px; justify-content: center; }
.footer-links a { font-size: 13px; color: var(--ink-2); }
.footer-links a:hover { color: var(--accent-deep); }
.footer-meta { font-size: 12px; color: var(--muted); text-align: right; font-family: var(--mono); letter-spacing: .04em; }
.footer-legal {
  grid-column: 1 / -1;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--muted);
}
.footer-copyright { grid-column: 1 / -1; font-size: 11.5px; color: var(--muted); }

/* ---------- 动效 ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */

@media (max-width: 1180px) {
  .brand-sub { display: none; }
  .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .delivery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sec-head { grid-template-columns: 60px minmax(0, 1fr); }
  .sec-aside { grid-column: 2; max-width: 52em; }
}

@media (max-width: 980px) {
  .nav-links { display: none; }
  .nav-toggle { display: grid; }
  .nav-links.is-open {
    display: flex;
    position: fixed;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    gap: 2px;
    padding: 14px var(--pad) 22px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -24px rgba(36, 42, 58, .4);
  }
  .nav-links.is-open a { padding: 12px 14px; font-size: 15px; }
  .brand-sub { display: none; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-shot { order: 2; max-width: 760px; }
  .two-col { grid-template-columns: 1fr; gap: 18px; }
  .barrier-grid { grid-template-columns: 1fr; }
  .definition { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .gates { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .gates li::after { display: none; }
  .approval { grid-template-columns: 1fr; }
  .capability-map { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .map-col:nth-child(3) { border-left: 0; padding-left: 0; }
  .map-col:nth-child(n+3) { border-top: 1px solid var(--line); }
  .cta-panel { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; text-align: left; }
  .footer-links { justify-content: flex-start; }
  .footer-meta { text-align: left; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .sec-head { grid-template-columns: 1fr; }
  .sec-no { font-size: 34px; }
  .sec-aside { grid-column: 1; }
  .hero-stats > div { padding-right: 18px; margin-right: 18px; }
  .hero-stats dt { font-size: 24px; }
  .scene-grid { grid-template-columns: 1fr; }
  .delivery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .path-steps { grid-template-columns: 1fr 1fr; }
  .phases ol { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 1fr; gap: 10px; padding: 16px 18px; }
  .versus { grid-template-columns: 1fr; }
  .vs-points ul { grid-template-columns: 1fr; }
  .cta-card dd { font-size: 15px; }
}

@media (max-width: 520px) {
  .cap-grid { grid-template-columns: 1fr; }
  .capability-map { grid-template-columns: 1fr; }
  .map-col, .map-col + .map-col { border-left: 0; padding-left: 0; }
  .map-col + .map-col { border-top: 1px solid var(--line); }
  .gates { grid-template-columns: 1fr; }
  .delivery-grid { grid-template-columns: 1fr; }
  .path-steps { grid-template-columns: 1fr; }
  .tabs { width: 100%; }
  .tab { flex: 1; padding: 8px 12px; font-size: 13px; }
  .hero-stats { gap: 14px 0; }
  .hero-stats > div { width: 50%; border-right: 0; margin-right: 0; padding-right: 0; }
}

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