/* ═══════════════════════════════════════════════════════════════
   GeoAI 官网 · 设计系统
   深色毛玻璃（默认）/ 浅色，主题由 <html data-theme> 控制
   ═══════════════════════════════════════════════════════════════ */

:root,
[data-theme='dark'] {
  --bg: #08090c;
  --bg-soft: #0d0f14;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-strong: rgba(255, 255, 255, 0.07);
  --panel-border: rgba(255, 255, 255, 0.09);
  --panel-border-strong: rgba(255, 255, 255, 0.16);
  --text: #f4f5f7;
  --text-dim: rgba(244, 245, 247, 0.62);
  --text-mute: rgba(244, 245, 247, 0.38);
  --line: rgba(255, 255, 255, 0.08);
  --ink: #08090c;
  --white: #fff;
  --accent-bg: #fff;
  --accent-ink: #08090c;
  --accent-glow: rgba(255, 255, 255, 0.5);
  --accent-glow-hover: rgba(255, 255, 255, 0.65);
  --hl-from: #ffffff;
  --hl-to: rgba(255, 255, 255, 0.55);
  --code-bg: #0a0c10;
  --code-border: rgba(255, 255, 255, 0.09);
  --code-line: rgba(255, 255, 255, 0.08);
  --grid-line: rgba(255, 255, 255, 0.025);
  --glow-a: rgba(255, 255, 255, 0.08);
  --glow-b: rgba(255, 255, 255, 0.05);
  --glow-c: rgba(255, 255, 255, 0.04);
  --scroll-thumb: rgba(255, 255, 255, 0.14);
  --nav-bg: rgba(8, 9, 12, 0.62);
  --shadow-soft: 0 30px 80px -30px rgba(0, 0, 0, 0.9);
  --radius-lg: 20px;
  --radius-md: 14px;
  --blur: blur(20px) saturate(140%);
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, ui-monospace, monospace;
  color-scheme: dark;
}

[data-theme='light'] {
  --bg: #f4f5f7;
  --bg-soft: #ffffff;
  --panel: rgba(23, 26, 32, 0.045);
  --panel-strong: rgba(23, 26, 32, 0.07);
  --panel-border: rgba(23, 26, 32, 0.1);
  --panel-border-strong: rgba(23, 26, 32, 0.18);
  --text: #17191d;
  --text-dim: rgba(23, 25, 29, 0.66);
  --text-mute: rgba(23, 25, 29, 0.44);
  --line: rgba(23, 26, 32, 0.1);
  --ink: #ffffff;
  --white: #17191d;
  --accent-bg: #17191d;
  --accent-ink: #ffffff;
  --accent-glow: rgba(23, 25, 29, 0.2);
  --accent-glow-hover: rgba(23, 25, 29, 0.28);
  --hl-from: #111318;
  --hl-to: rgba(17, 19, 24, 0.55);
  --code-bg: #0a0c10;
  --code-border: rgba(255, 255, 255, 0.09);
  --code-line: rgba(255, 255, 255, 0.08);
  --grid-line: rgba(23, 26, 32, 0.05);
  --glow-a: rgba(23, 26, 32, 0.05);
  --glow-b: rgba(23, 26, 32, 0.04);
  --glow-c: rgba(23, 26, 32, 0.03);
  --scroll-thumb: rgba(23, 26, 32, 0.2);
  --nav-bg: rgba(255, 255, 255, 0.72);
  --shadow-soft: 0 30px 80px -30px rgba(30, 40, 60, 0.3);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
}

body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--white);
  color: var(--ink);
}

/* 全局背景：极深底色 + 远处柔光 + 淡网格 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 75% -5%, var(--glow-a), transparent 55%),
    radial-gradient(700px 500px at 10% 30%, var(--glow-b), transparent 55%),
    radial-gradient(800px 600px at 50% 110%, var(--glow-c), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  transition: background 0.3s ease;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 35%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 35%, #000 0%, transparent 75%);
}

/* ─────────── 通用布局 ─────────── */
.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.glass {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-lg);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

main > section {
  padding: 110px 0;
}

/* ─────────── 文案组件 ─────────── */
.sec-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 16px;
  opacity: 0.7;
}

.sec-title {
  font-size: clamp(28px, 3.4vw, 46px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--text);
  margin: 0;
}

.hl {
  background: linear-gradient(135deg, var(--hl-from) 0%, var(--hl-to) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sec-desc {
  color: var(--text-dim);
  font-size: 16px;
  margin-top: 16px;
}

/* ─────────── 按钮 ─────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 34px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s, background 0.25s, color 0.25s;
  border: none;
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent-bg);
  color: var(--accent-ink);
  box-shadow: 0 0 40px -8px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 56px -4px var(--accent-glow-hover);
}

.btn-ghost {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

.btn-ghost:hover {
  border-color: var(--panel-border-strong);
  background: var(--panel-strong);
  transform: translateY(-2px);
}

/* ─────────── 顶部导航 ─────────── */
.sc-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.sc-nav.scrolled {
  border-bottom-color: var(--line);
}

.sc-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}

.sc-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.sc-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--accent-bg);
  display: grid;
  place-items: center;
  box-shadow: 0 0 30px -6px var(--accent-glow);
  flex-shrink: 0;
}

.sc-mark svg {
  width: 22px;
  height: 22px;
  color: var(--accent-ink);
}

.sc-name {
  font-size: 16px;
}

.sc-name b {
  font-weight: 800;
}

.sc-ver {
  font-size: 10px;
  color: var(--text-mute);
  border: 1px solid var(--panel-border);
  padding: 2px 8px;
  border-radius: 20px;
  margin-left: 6px;
  letter-spacing: 0.5px;
  vertical-align: middle;
}

.sc-links {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--text-dim);
}

.sc-links a {
  transition: color 0.2s;
}

.sc-links a:hover {
  color: var(--text);
}

.sc-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sc-icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: border-color 0.2s, color 0.2s, transform 0.2s;
}

.sc-icon-btn:hover {
  border-color: var(--panel-border-strong);
  color: var(--white);
  transform: translateY(-1px);
}

.sc-icon-btn svg {
  width: 16px;
  height: 16px;
}

.sc-lang {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.5px;
  padding: 7px 12px;
  border-radius: 24px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: border-color 0.2s, color 0.2s;
}

.sc-lang:hover {
  border-color: var(--panel-border-strong);
  color: var(--white);
}

.sc-cta {
  font-size: 13px;
  padding: 9px 18px;
  border-radius: 30px;
  color: var(--accent-ink);
  font-weight: 700;
  background: var(--accent-bg);
  box-shadow: 0 8px 24px -8px var(--accent-glow);
  transition: transform 0.25s;
  white-space: nowrap;
}

.sc-cta:hover {
  transform: translateY(-2px);
}

/* ─────────── HERO ─────────── */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 48px 80px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  opacity: 0.7;
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 960px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 22px;
  border-radius: 30px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 36px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.pill-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-bg);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

.hero-title {
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.1;
  color: var(--text);
  margin: 0 0 28px;
}

.hero-desc {
  color: var(--text-dim);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  max-width: 820px;
  margin: 0 0 44px;
}

.hero-desc em {
  color: var(--text);
  font-style: normal;
  font-weight: 600;
}

.hero-actions {
  display: flex;
  gap: 18px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  width: 100%;
  max-width: 820px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.stat b {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -1px;
  font-family: var(--font-mono);
}

.stat span {
  font-size: 13px;
  color: var(--text-mute);
  letter-spacing: 0.5px;
}

/* ─────────── 痛点 vs 方案 ─────────── */
.pain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.pain-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pain-card {
  padding: 24px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: transform 0.25s, border-color 0.25s;
}

.pain-card:hover {
  transform: translateY(-3px);
  border-color: var(--panel-border-strong);
}

.pain-card.pain {
  background: var(--panel);
}

.pain-card.solve {
  background: var(--panel-strong);
}

.pain-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 8px;
}

.pain-ic {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  flex-shrink: 0;
}

.pain .pain-ic {
  background: var(--panel-strong);
  color: var(--text-dim);
}

.solve .pain-ic {
  background: var(--accent-bg);
  color: var(--accent-ink);
}

.pain-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 13.5px;
}

/* ─────────── 特性卡片 ─────────── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feat {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}

.feat:hover {
  transform: translateY(-4px);
  border-color: var(--panel-border-strong);
  background: var(--panel-strong);
}

.feat-ic {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--panel-strong);
  border: 1px solid var(--panel-border);
  display: grid;
  place-items: center;
  color: var(--text);
  margin-bottom: 18px;
}

.feat-ic svg {
  width: 22px;
  height: 22px;
}

.feat h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--text);
}

.feat p {
  margin: 0 0 16px;
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.65;
}

.tag {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-mute);
  border: 1px solid var(--line);
  padding: 3px 10px;
  border-radius: 20px;
  display: inline-block;
}

/* ─────────── 经验飞轮 ─────────── */
.flywheel-section {
  background: linear-gradient(180deg, transparent, var(--panel), transparent);
}

.flywheel {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}

.fw-step {
  position: relative;
  padding: 26px 22px;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: transform 0.25s, border-color 0.25s;
}

.fw-step:hover {
  transform: translateY(-4px);
  border-color: var(--panel-border-strong);
}

.fw-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-ink);
  background: var(--accent-bg);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  margin-bottom: 14px;
}

.fw-step h4 {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--text);
}

.fw-step p {
  margin: 0;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}

.fw-arrow {
  position: absolute;
  top: 50%;
  right: -13px;
  transform: translateY(-50%);
  color: var(--text-mute);
  font-size: 16px;
  z-index: 3;
}

.fw-loop {
  text-align: center;
  margin-top: 28px;
  color: var(--text-mute);
  font-size: 13px;
  font-family: var(--font-mono);
}

/* ─────────── 架构图 ─────────── */
.arch {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.arch-layer {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 24px;
  border-radius: var(--radius-md);
  background: var(--panel-strong);
  border: 1px solid var(--panel-border);
}

.arch-layer b {
  font-size: 16px;
  color: var(--text);
  min-width: 130px;
}

.arch-layer span {
  font-size: 12.5px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.arch-layer.accent {
  background: var(--accent-bg);
  border-color: var(--accent-bg);
}

.arch-layer.accent b,
.arch-layer.accent span {
  color: var(--accent-ink);
}

.arch-arrow {
  text-align: center;
  color: var(--text-mute);
  line-height: 1.4;
  font-size: 13px;
}

.arch-legend {
  display: flex;
  gap: 32px;
  justify-content: center;
  margin-top: 24px;
  flex-wrap: wrap;
}

.arch-legend span {
  color: var(--text-mute);
  font-size: 12px;
  font-family: var(--font-mono);
}

/* ─────────── 快速开始 ─────────── */
.tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.tab {
  padding: 9px 20px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.tab:hover {
  color: var(--text);
  border-color: var(--panel-border-strong);
}

.tab.active {
  color: var(--accent-ink);
  background: var(--accent-bg);
  border-color: var(--accent-bg);
}

/* ─────────── 代码块 ─────────── */
.code-block {
  max-width: 860px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  box-shadow: var(--shadow-soft);
}

.code-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 20px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid var(--code-line);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-mono);
}

.code-dots {
  display: flex;
  gap: 6px;
}

.code-dots i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
}

.code-dots i:nth-child(1) {
  background: rgba(255, 99, 99, 0.7);
}
.code-dots i:nth-child(2) {
  background: rgba(255, 205, 97, 0.7);
}
.code-dots i:nth-child(3) {
  background: rgba(96, 217, 140, 0.7);
}

.code-file {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.code-copy {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 4px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.code-copy:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.code-body {
  padding: 24px 28px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: #e8eaee;
}

.code-line {
  white-space: pre;
  min-height: 1.8em;
}

.tk-key {
  color: #fff;
  font-weight: 600;
}
.tk-str {
  color: rgba(255, 255, 255, 0.72);
}
.tk-fn {
  color: #fff;
  font-weight: 600;
}
.tk-cmt {
  color: rgba(255, 255, 255, 0.38);
  font-style: italic;
}
.tk-num {
  color: rgba(255, 255, 255, 0.85);
}
.tk-punc {
  color: rgba(255, 255, 255, 0.5);
}
.tk-cmd {
  color: #fff;
  font-weight: 600;
}

/* ─────────── 能力库 ─────────── */
.kits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.kit {
  padding: 26px;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  display: flex;
  flex-direction: column;
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}

.kit:hover {
  transform: translateY(-4px);
  border-color: var(--panel-border-strong);
  background: var(--panel-strong);
}

.kit-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.kit-ic {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--panel-strong);
  border: 1px solid var(--panel-border);
  display: grid;
  place-items: center;
  color: var(--text);
  flex-shrink: 0;
}

.kit-ic svg {
  width: 20px;
  height: 20px;
}

.kit-title {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.kit h3 {
  margin: 0;
  font-size: 16px;
  color: var(--text);
}

.kit-id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-mute);
}

.badge {
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
}

.badge.ready {
  color: var(--accent-ink);
  background: var(--accent-bg);
  border-color: var(--accent-bg);
}

.badge.planned {
  color: var(--text-mute);
}

.kit p {
  margin: 0 0 16px;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.65;
}

.kit-sig {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 10px;
  padding: 10px 12px;
  overflow-x: auto;
  white-space: nowrap;
}

/* ─────────── 工具列表 ─────────── */
.tools {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 980px;
  margin: 0 auto;
}

.tool {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: border-color 0.2s, background 0.2s;
}

.tool:hover {
  border-color: var(--panel-border-strong);
  background: var(--panel-strong);
}

.tool code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--white);
  font-weight: 600;
  white-space: nowrap;
  min-width: 138px;
}

.tool span {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.55;
}

/* ─────────── 应用场景 ─────────── */
.case {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}

.case:hover {
  transform: translateY(-4px);
  border-color: var(--panel-border-strong);
  background: var(--panel-strong);
}

.case-ic {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--panel-strong);
  border: 1px solid var(--panel-border);
  color: var(--text);
  margin-bottom: 16px;
}

.case-ic svg {
  width: 22px;
  height: 22px;
}

.case h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--text);
}

.case p {
  margin: 0;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.65;
}

/* ─────────── 路线图 ─────────── */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--panel-border-strong);
}

.tl-item {
  position: relative;
  padding: 0 0 34px 24px;
}

.tl-item:last-child {
  padding-bottom: 0;
}

.tl-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 6px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--white);
  box-shadow: 0 0 16px var(--accent-glow);
}

.tl-ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-ink);
  background: var(--accent-bg);
  padding: 2px 12px;
  border-radius: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.tl-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.tl-desc {
  font-size: 13.5px;
  color: var(--text-dim);
}

/* ─────────── CTA ─────────── */
.cta-band {
  padding: 120px 0;
  text-align: center;
  background: linear-gradient(180deg, transparent, var(--panel), transparent);
  border-top: 1px solid var(--line);
}

.cta-band h2 {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin: 0 0 16px;
}

.cta-band p {
  color: var(--text-dim);
  font-size: 16px;
  margin: 0 0 40px;
}

.cta-actions {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ─────────── 页脚 ─────────── */
.sc-footer {
  background: var(--bg);
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
}

.sc-foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.sc-foot-brand {
  max-width: 320px;
}

.sc-foot-brand p {
  color: var(--text-mute);
  font-size: 13px;
  margin-top: 14px;
}

.sc-foot-col h4 {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text);
  margin: 0 0 16px;
  text-transform: uppercase;
  opacity: 0.85;
}

.sc-foot-col a {
  display: block;
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 10px;
  transition: color 0.2s;
}

.sc-foot-col a:hover {
  color: var(--text);
}

.sc-foot-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  color: var(--text-mute);
  font-size: 12px;
  flex-wrap: wrap;
  gap: 12px;
}

.sc-foot-disclaimer {
  margin-top: 16px;
  color: var(--text-mute);
  font-size: 11px;
  line-height: 1.6;
  opacity: 0.7;
}

/* ─────────── 入场动画 ─────────── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .pill-dot {
    animation: none;
  }
}

/* ─────────── 滚动条 ─────────── */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border-radius: 6px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-track {
  background: transparent;
}

/* ─────────── 响应式 ─────────── */
@media (max-width: 1080px) {
  .grid-3,
  .kits-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .flywheel {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 16px;
  }
  .fw-arrow {
    display: none;
  }
}

@media (max-width: 860px) {
  .sc-links {
    display: none;
  }
  .sc-name {
    font-size: 14px;
  }
  main > section {
    padding: 80px 0;
  }
}

@media (max-width: 760px) {
  .hero {
    padding: 100px 24px 60px;
    min-height: auto;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .hero-actions {
    gap: 12px;
  }
  .btn {
    padding: 14px 28px;
    font-size: 14px;
  }
  .pain-grid,
  .grid-3,
  .kits-grid,
  .tools {
    grid-template-columns: 1fr;
  }
  .flywheel {
    grid-template-columns: 1fr;
  }
  .arch {
    padding: 24px;
  }
  .arch-layer {
    flex-direction: column;
    gap: 4px;
  }
  .arch-layer b {
    min-width: 0;
  }
  .sc-foot-grid {
    grid-template-columns: 1fr 1fr;
  }
  .sec-head {
    margin-bottom: 44px;
  }
}

@media (max-width: 560px) {
  .sc-nav-inner {
    gap: 8px;
  }
  .sc-brand {
    min-width: 0;
  }
  .sc-ver {
    display: none;
  }
  .sc-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .sc-actions {
    gap: 6px;
    flex-shrink: 0;
  }
  .sc-cta {
    padding: 8px 14px;
    font-size: 12px;
  }
  .sc-lang {
    padding: 6px 10px;
  }
  .sc-icon-btn {
    width: 32px;
    height: 32px;
  }
  .hero-title {
    letter-spacing: -1px;
  }
}