/* ============================================================
   简朔科技 · 企业官网 — 设计系统
   纯 CSS，无第三方 UI 框架
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 色彩 */
  --c-bg-1: #FFFBFA;            /* 暖白底 */
  --c-bg-2: #FFF4F3;
  --c-bg-3: #FDE9E7;
  --c-surface: rgba(255, 255, 255, 0.78);
  --c-surface-2: rgba(255, 255, 255, 0.94);
  --c-border: rgba(255, 9, 9, 0.14);
  --c-border-strong: rgba(255, 9, 9, 0.3);
  --c-accent: #FF0909;          /* 品牌红 */
  --c-accent-soft: #FF5A50;
  --c-accent-deep: #B80000;
  --c-accent-glow: rgba(255, 9, 9, 0.26);

  /* 文本 */
  --c-text: #1F1717;            /* 主文本 */
  --c-text-soft: #5F4642;       /* 次要文本 */
  --c-text-mute: #8A5B55;       /* 弱化文本 */

  /* 字体 */
  --font-head: "Space Grotesk", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-cn: "Noto Sans SC", "PingFang SC", system-ui, sans-serif;

  /* 尺寸 / 节奏 */
  --container: 1200px;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;

  /* 过渡 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 180ms var(--ease);
  --t-med: 320ms var(--ease);

  /* 阴影 */
  --shadow-card: 0 16px 42px -24px rgba(130, 24, 24, 0.22);
  --shadow-glow: 0 0 0 1px var(--c-border-strong), 0 18px 46px -26px rgba(255, 9, 9, 0.34);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 90px; /* 锚点留出固定导航高度 */
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg-1);
  background-image:
    radial-gradient(circle at 82% 10%, rgba(255, 9, 9, 0.055), transparent 28%),
    radial-gradient(circle at 8% 48%, rgba(255, 90, 80, 0.035), transparent 24%),
    linear-gradient(180deg, #ffffff 0%, var(--c-bg-1) 40%, #fff8f7 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

::selection { background: var(--c-accent); color: #ffffff; }

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 背景层 ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 9, 9, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 9, 9, 0.018) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 82% 58% at 50% 0%, #000 12%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 82% 58% at 50% 0%, #000 12%, transparent 78%);
}

.bg-glow {
  position: fixed;
  z-index: 0;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.28;
}
.bg-glow--1 {
  width: 520px; height: 520px;
  top: -120px; right: -80px;
  background: radial-gradient(circle, rgba(255, 9, 9, 0.14), transparent 68%);
}
.bg-glow--2 {
  width: 600px; height: 600px;
  bottom: -200px; left: -160px;
  background: radial-gradient(circle, rgba(255, 90, 80, 0.08), transparent 70%);
}

/* ---------- 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section { padding: 120px 0; position: relative; }
.section--alt::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, transparent, rgba(255, 9, 9, 0.014), transparent);
  pointer-events: none;
}

.section__head {
  max-width: 720px;
  margin: 0 auto 64px;
  text-align: center;
}
.section__tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  padding: 6px 14px;
  border: 1px solid var(--c-border);
  border-radius: 100px;
  background: var(--c-surface);
  margin-bottom: 20px;
}
.section__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.section__desc {
  color: var(--c-text-soft);
  font-size: 1.05rem;
}

.text-accent { color: var(--c-accent); }
.gradient-text {
  background: linear-gradient(120deg, #1F2933 8%, var(--c-accent) 58%, #FF3B30 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 13px 28px;
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
}
.btn--primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--c-accent-deep) 0%, #FF0909 52%, var(--c-accent-soft) 100%);
  border: 1px solid transparent;
  box-shadow: 0 10px 26px -12px rgba(255, 9, 9, 0.62);
}
.btn--primary:hover {
  box-shadow: 0 0 0 1px rgba(255, 9, 9, 0.28), 0 16px 34px -14px rgba(255, 9, 9, 0.72);
  transform: translateY(-1px);
}
.btn--ghost {
  color: var(--c-text);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn--ghost:hover {
  color: var(--c-accent);
  border-color: var(--c-border-strong);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 12px 28px -20px rgba(255, 9, 9, 0.35);
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  transition: background var(--t-med), border-color var(--t-med), backdrop-filter var(--t-med);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(255, 251, 250, 0.9);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--c-border);
  box-shadow: 0 10px 30px -24px rgba(150, 22, 22, 0.28);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand__mark {
  display: grid;
  place-items: center;
  filter: drop-shadow(0 2px 10px rgba(255, 9, 9, 0.32));
  transition: transform var(--t-fast);
}
.brand:hover .brand__mark { transform: translateY(-1px); }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name {
  font-family: var(--font-cn);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.06em;
}
.brand__sub {
  font-family: "Sora", var(--font-head);
  font-weight: 600;
  font-size: 9px;
  letter-spacing: 0.36em;
  color: var(--c-accent);
  margin-top: 2px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav__link {
  position: relative;
  font-size: 14.5px;
  color: var(--c-text-soft);
  padding: 8px 16px;
  border-radius: 8px;
  transition: color var(--t-fast), background var(--t-fast);
}
.nav__link:hover { color: var(--c-text); background: var(--c-surface); }
.nav__link.is-active { color: var(--c-accent); }
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 1.5px;
  background: var(--c-accent);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--c-accent);
}
.nav__cta { margin-left: 8px; padding: 9px 20px; }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 44px; height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--c-border);
}
.nav__toggle span {
  width: 20px; height: 1.6px;
  background: var(--c-text);
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { padding: 160px 0 100px; position: relative; }
.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--c-text-soft);
  padding: 7px 14px;
  border: 1px solid var(--c-border);
  border-radius: 100px;
  background: var(--c-surface);
  margin-bottom: 28px;
}
.eyebrow__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 10px var(--c-accent);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.8); }
}
.hero__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.4rem, 5.6vw, 4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.hero__subtitle {
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 500;
  color: var(--c-accent);
  letter-spacing: 0.02em;
  margin-bottom: 18px;
}
.hero__desc {
  color: var(--c-text-soft);
  font-size: 1.05rem;
  max-width: 520px;
  margin-bottom: 36px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 52px; }

.hero__stats {
  display: flex;
  align-items: center;
  gap: 28px;
}
.stat { display: flex; flex-direction: column; }
.stat__num {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.6rem;
  color: var(--c-text);
  letter-spacing: -0.01em;
}
.stat__plus { color: var(--c-accent); }
.stat__label {
  font-size: 12.5px;
  color: var(--c-text-mute);
  margin-top: 2px;
}
.stat__sep {
  width: 1px; height: 36px;
  background: var(--c-border);
}

/* Hero SVG 互联闭环 */
.hero__visual { display: flex; justify-content: center; }
.loop { width: 100%; max-width: 520px; }

.loop__ring {
  fill: none;
  stroke: rgba(255, 107, 95, 0.14);
  stroke-width: 1;
}
.loop__ring--outer {
  stroke: rgba(255, 9, 9, 0.18);
  stroke-dasharray: 2 10;
  transform-origin: 250px 250px;
  animation: spin 60s linear infinite;
}
.loop__ring--mid { stroke-dasharray: 1 6; }
@keyframes spin { to { transform: rotate(360deg); } }

.loop__flow path {
  fill: none;
  stroke: var(--c-accent);
  stroke-width: 1.4;
  stroke-linecap: round;
  opacity: 0.55;
  stroke-dasharray: 14 220;
  animation: flow 6s linear infinite;
}
.loop__flow path:nth-child(2) { animation-delay: -1.5s; }
.loop__flow path:nth-child(3) { animation-delay: -3s; }
.loop__flow path:nth-child(4) { animation-delay: -4.5s; }
@keyframes flow {
  from { stroke-dashoffset: 234; }
  to { stroke-dashoffset: 0; }
}

.loop__spokes line {
  stroke: rgba(255, 107, 95, 0.18);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.loop__core-glow {
  fill: rgba(255, 9, 9, 0.12);
  filter: blur(2px);
}
.loop__core-ring {
  fill: none;
  stroke: rgba(255, 9, 9, 0.4);
  stroke-width: 1;
}
.loop__core-hex {
  fill: rgba(255, 9, 9, 0.06);
  stroke: var(--c-accent);
  stroke-width: 1.4;
  filter: drop-shadow(0 0 8px rgba(255, 9, 9, 0.5));
}
.loop__core-text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 22px;
  fill: var(--c-text);
  letter-spacing: 0.05em;
}

.loop__node { color: var(--c-accent); }
.loop__node-bg {
  fill: rgba(255, 255, 255, 0.92);
  stroke: rgba(255, 9, 9, 0.46);
  stroke-width: 1.2;
}
.loop__node-ring {
  fill: none;
  stroke: rgba(255, 9, 9, 0.25);
  stroke-width: 1;
  transform-box: fill-box;
  transform-origin: center;
  animation: nodePulse 3s var(--ease) infinite;
}
@keyframes nodePulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.18); }
}
.loop__node-icon { transform-box: fill-box; transform-origin: center; }
.loop__node-label {
  font-family: var(--font-cn);
  font-size: 13px;
  font-weight: 500;
  fill: var(--c-text-soft);
}

/* ---------- 产品演示：运营驾驶舱 ---------- */
.ops-cockpit { overflow: hidden; }
.ops-cockpit::before {
  content: "";
  position: absolute;
  inset: 8% 0 auto;
  height: 520px;
  background:
    radial-gradient(circle at 18% 35%, rgba(255, 9, 9, 0.14), transparent 34%),
    radial-gradient(circle at 82% 40%, rgba(255, 90, 80, 0.12), transparent 32%);
  pointer-events: none;
}
.ops-cockpit__grid {
  display: grid;
  grid-template-columns: 0.95fr 1.35fr 0.85fr;
  gap: 22px;
  align-items: stretch;
}
.ops-flow,
.ops-screen,
.ops-ai {
  border: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 22px 58px -38px rgba(150, 22, 22, 0.34);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.ops-flow {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px;
  border-radius: 22px;
}
.ops-flow__item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  padding: 16px;
  border-radius: 16px;
  border: 1px solid transparent;
  color: var(--c-text-soft);
  background: rgba(255, 246, 245, 0.68);
  transition: border-color var(--t-med), background var(--t-med), transform var(--t-med), color var(--t-med);
}
.ops-flow__item.is-active {
  color: var(--c-text);
  border-color: rgba(255, 9, 9, 0.28);
  background: linear-gradient(135deg, rgba(255, 238, 236, 0.96), rgba(255, 255, 255, 0.82));
  transform: translateY(-2px);
}
.ops-flow__index {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--c-accent);
  background: rgba(255, 9, 9, 0.08);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
}
.ops-flow h3 { font-size: 16px; margin-bottom: 6px; }
.ops-flow p { color: inherit; font-size: 13.5px; line-height: 1.65; }
.ops-screen {
  position: relative;
  min-height: 430px;
  border-radius: 28px;
  padding: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 246, 245, 0.9)),
    radial-gradient(circle at top right, rgba(255, 9, 9, 0.16), transparent 34%);
}
.ops-screen::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 22px;
  border: 1px solid rgba(255, 9, 9, 0.08);
  pointer-events: none;
}
.ops-screen__top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 22px;
}
.ops-screen__top strong {
  display: block;
  font-family: var(--font-head);
  font-size: 22px;
  margin-top: 4px;
}
.ops-screen__eyebrow {
  color: var(--c-accent);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.ops-screen__live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #15803d;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.1);
}
.ops-screen__live i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 14px #22c55e;
  animation: pulse 2s var(--ease) infinite;
}
.ops-metrics {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 12px;
}
.ops-metric {
  min-height: 124px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(255, 9, 9, 0.12);
}
.ops-metric span,
.ops-metric small {
  display: block;
  color: var(--c-text-mute);
  font-size: 12.5px;
}
.ops-metric strong {
  display: block;
  margin: 8px 0;
  font-family: var(--font-head);
  font-size: 32px;
  letter-spacing: -0.03em;
}
.ops-metric--warn strong { color: #fbbf24; }
.ops-progress {
  height: 7px;
  margin-top: 16px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(148, 163, 184, 0.18);
}
.ops-progress i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--c-accent), #22c55e);
  transition: width 700ms var(--ease);
}
.ops-task-board {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}
.ops-task {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  border-radius: 16px;
  color: var(--c-text-soft);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(255, 9, 9, 0.1);
}
.ops-task b {
  font-size: 13px;
  color: var(--c-text);
  white-space: nowrap;
}
.ops-task.is-done b { color: #86efac; }
.ops-task.is-active {
  border-color: rgba(255, 9, 9, 0.28);
  animation: cockpitGlow 3.8s var(--ease) infinite;
}
@keyframes cockpitGlow {
  0%, 100% { box-shadow: 0 0 0 rgba(255, 9, 9, 0); }
  50% { box-shadow: 0 0 28px -18px rgba(255, 9, 9, 0.9); }
}
.ops-ai {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-radius: 22px;
  padding: 20px;
}
.ops-ai__label {
  width: fit-content;
  color: #ffffff;
  background: linear-gradient(135deg, var(--c-accent-deep), var(--c-accent));
  padding: 7px 12px;
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
}
.ops-ai p {
  margin: 26px 0;
  color: var(--c-text);
  font-size: 18px;
  line-height: 1.75;
}
.ops-ai__chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.ops-ai__chips span {
  color: var(--c-text-soft);
  font-size: 12px;
  padding: 7px 9px;
  border-radius: 999px;
  border: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.035);
}

/* ---------- 实机效果：核心功能双端展示 ---------- */
.feature-showcase {
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(28, 14, 8, 0), rgba(255, 9, 9, 0.035) 48%, rgba(28, 14, 8, 0));
}
.feature-showcase__grid {
  display: grid;
  grid-template-columns: 0.88fr 1.85fr;
  gap: 24px;
  align-items: stretch;
}
.feature-tabs {
  display: grid;
  gap: 14px;
}
.feature-tab {
  width: 100%;
  min-height: 136px;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  align-content: center;
  text-align: left;
  padding: 18px;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  color: var(--c-text-soft);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 16px 42px -34px rgba(130, 24, 24, 0.28);
  cursor: pointer;
  transition: transform var(--t-med), border-color var(--t-med), background var(--t-med), color var(--t-med);
}
.feature-tab:hover,
.feature-tab.is-active {
  color: var(--c-text);
  border-color: rgba(255, 9, 9, 0.36);
  background: linear-gradient(135deg, rgba(255, 236, 234, 0.94), rgba(255, 255, 255, 0.84));
  transform: translateY(-2px);
}
.feature-tab__num {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--c-accent);
  background: rgba(255, 9, 9, 0.08);
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  grid-row: 1 / span 2;
}
.feature-tab strong {
  display: block;
  grid-column: 2;
  margin-bottom: 8px;
  color: inherit;
  font-family: var(--font-head);
  font-size: 17px;
}
.feature-tab small {
  display: block;
  grid-column: 2;
  color: inherit;
  font-size: 13.5px;
  line-height: 1.65;
}
.device-stage {
  position: relative;
  min-height: 560px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 20px;
  align-items: end;
}
.device-stage::before {
  content: "";
  position: absolute;
  inset: 11% 6% 9%;
  border-radius: 32px;
  background:
    radial-gradient(circle at 28% 22%, rgba(255, 9, 9, 0.16), transparent 32%),
    radial-gradient(circle at 78% 68%, rgba(34, 197, 94, 0.1), transparent 30%);
  filter: blur(10px);
  pointer-events: none;
}
.pc-demo,
.phone-demo,
.feature-insight {
  position: relative;
  border: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 28px 78px -50px rgba(130, 24, 24, 0.38);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.pc-demo {
  min-height: 460px;
  border-radius: 26px;
  overflow: hidden;
}
.pc-demo__bar {
  height: 46px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 18px;
  border-bottom: 1px solid rgba(255, 9, 9, 0.08);
  background: rgba(255, 246, 245, 0.82);
}
.pc-demo__bar span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.62);
}
.pc-demo__bar span:first-child { background: #fb7185; }
.pc-demo__bar span:nth-child(2) { background: #fbbf24; }
.pc-demo__bar span:nth-child(3) { background: #22c55e; }
.pc-demo__bar b {
  margin-left: 8px;
  color: var(--c-text-soft);
  font-size: 12px;
}
.pc-demo__body {
  display: grid;
  grid-template-columns: 128px 1fr;
  min-height: 414px;
}
.pc-demo__side {
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 18px 12px;
  border-right: 1px solid rgba(255, 9, 9, 0.08);
  background: rgba(255, 246, 245, 0.64);
}
.pc-demo__side span {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--c-text-mute);
  font-size: 12.5px;
}
.pc-demo__side span.is-active {
  color: var(--c-text);
  background: rgba(255, 9, 9, 0.12);
}
.pc-demo__main {
  padding: 22px;
}
.pc-demo__head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
}
.pc-demo__head span {
  display: block;
  margin-bottom: 6px;
  color: var(--c-accent);
  font-size: 12px;
}
.pc-demo__head strong {
  display: block;
  font-family: var(--font-head);
  font-size: 23px;
}
.pc-demo__head em {
  flex: 0 0 auto;
  font-style: normal;
  color: #9ff7d3;
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.1);
}
.pc-demo__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 22px 0 18px;
}
.pc-demo__cards div {
  min-height: 104px;
  padding: 15px;
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(255, 9, 9, 0.1);
}
.pc-demo__cards span {
  display: block;
  color: var(--c-text-mute);
  font-size: 12px;
}
.pc-demo__cards b {
  display: block;
  margin-top: 10px;
  font-family: var(--font-head);
  font-size: 30px;
}
.pc-demo__table {
  display: grid;
  gap: 10px;
}
.pc-demo__table div {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 13px 14px;
  border-radius: 14px;
  color: var(--c-text-soft);
  background: rgba(255, 246, 245, 0.72);
  border: 1px solid rgba(255, 9, 9, 0.08);
}
.pc-demo__table b {
  color: var(--c-text);
  font-size: 13px;
}
.pc-demo__table i {
  color: var(--c-text-mute);
  font-size: 12px;
  font-style: normal;
}
.phone-demo {
  width: 230px;
  min-height: 470px;
  border-radius: 34px;
  padding: 12px;
}
.phone-demo__speaker {
  position: absolute;
  top: 15px;
  left: 50%;
  width: 58px;
  height: 5px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.32);
  transform: translateX(-50%);
}
.phone-demo__screen {
  min-height: 446px;
  padding: 28px 14px 16px;
  border-radius: 26px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 246, 245, 0.92)),
    radial-gradient(circle at 50% 0, rgba(255, 9, 9, 0.16), transparent 28%);
}
.phone-demo__top {
  display: flex;
  justify-content: space-between;
  color: var(--c-text-mute);
  font-size: 12px;
}
.phone-demo h3 {
  margin: 22px 0 8px;
  font-family: var(--font-head);
  font-size: 19px;
}
.phone-demo p {
  min-height: 46px;
  color: var(--c-text-soft);
  font-size: 12.5px;
  line-height: 1.55;
}
.phone-demo__photo {
  position: relative;
  height: 128px;
  display: grid;
  place-items: center;
  margin: 16px 0;
  overflow: hidden;
  border-radius: 18px;
  color: var(--c-accent);
  background:
    linear-gradient(135deg, rgba(255, 9, 9, 0.16), rgba(214, 31, 31, 0.08)),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.045) 0 1px, transparent 1px 14px);
  border: 1px solid rgba(255, 9, 9, 0.2);
}
.phone-demo__photo i {
  position: absolute;
  width: 42px;
  height: 42px;
  right: 18px;
  bottom: 16px;
  border-radius: 14px;
  background: rgba(34, 197, 94, 0.16);
  border: 1px solid rgba(34, 197, 94, 0.34);
}
.phone-demo__list {
  display: grid;
  gap: 9px;
}
.phone-demo__list div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px;
  border-radius: 13px;
  background: rgba(255, 246, 245, 0.76);
}
.phone-demo__list span {
  color: var(--c-text-mute);
  font-size: 12px;
}
.phone-demo__list b {
  color: var(--c-text);
  font-size: 12px;
  white-space: nowrap;
}
.feature-insight {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 18px 22px;
  border-radius: 20px;
}
.feature-insight span {
  flex: 0 0 auto;
  color: #ffffff;
  background: linear-gradient(135deg, var(--c-accent-deep), var(--c-accent));
  padding: 7px 12px;
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
}
.feature-insight p {
  margin: 0;
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 业务范围卡片 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.card {
  position: relative;
  padding: 36px 28px;
  border-radius: var(--radius);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
  transition: transform var(--t-med), border-color var(--t-med), box-shadow var(--t-med), background var(--t-med);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(255, 9, 9, 0.1), transparent 60%);
  opacity: 0;
  transition: opacity var(--t-med);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--c-border-strong);
  background: var(--c-surface-2);
  box-shadow: var(--shadow-glow);
}
.card:hover::before { opacity: 1; }
.card__icon {
  width: 52px; height: 52px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--c-accent);
  background: rgba(255, 9, 9, 0.08);
  border: 1px solid rgba(255, 9, 9, 0.2);
  margin-bottom: 24px;
  transition: all var(--t-med);
}
.card:hover .card__icon {
  background: rgba(255, 9, 9, 0.14);
  box-shadow: 0 0 20px -4px rgba(255, 9, 9, 0.5);
}
.card__icon svg { width: 26px; height: 26px; }
.card__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.22rem;
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}
.card__text {
  color: var(--c-text-soft);
  font-size: 0.96rem;
  line-height: 1.7;
}
.card__line {
  position: absolute;
  left: 28px; right: 28px; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-med);
}
.card:hover .card__line { transform: scaleX(1); }

/* ---------- 技术能力 2x2 ---------- */
.grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.cap {
  display: flex;
  gap: 26px;
  padding: 38px 34px;
  border-radius: var(--radius);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform var(--t-med), border-color var(--t-med), background var(--t-med);
  position: relative;
  overflow: hidden;
}
.cap::after {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
  opacity: 0;
  transition: opacity var(--t-med);
}
.cap:hover {
  transform: translateY(-4px);
  border-color: var(--c-border-strong);
  background: var(--c-surface-2);
}
.cap:hover::after { opacity: 1; }
.cap__index {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.5rem;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 9, 9, 0.55);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}
.cap__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.28rem;
  margin-bottom: 10px;
}
.cap__text {
  color: var(--c-text-soft);
  font-size: 0.98rem;
  line-height: 1.75;
}

/* ---------- 关于我们 ---------- */
.about {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 56px;
  align-items: center;
}
.about__visual { display: flex; justify-content: center; }
.about__badge {
  position: relative;
  width: 240px; height: 240px;
  display: grid;
  place-items: center;
}
.about__badge-text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 3.4rem;
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-soft));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.04em;
}
.about__badge-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 9, 9, 0.3);
}
.about__badge-ring--2 {
  inset: 28px;
  border-style: dashed;
  border-color: rgba(255, 9, 9, 0.18);
  animation: spin 30s linear infinite;
}
.about__content .section__tag { margin-bottom: 18px; }
.about__text {
  color: var(--c-text-soft);
  font-size: 1.04rem;
  margin-bottom: 18px;
  line-height: 1.85;
}
.about__list {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 24px;
}
.about__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.96rem;
  color: var(--c-text);
}
.about__check {
  width: 18px; height: 18px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid var(--c-accent);
  background: rgba(255, 9, 9, 0.1);
  position: relative;
}
.about__check::after {
  content: "";
  position: absolute;
  left: 5px; top: 2px;
  width: 5px; height: 9px;
  border: solid var(--c-accent);
  border-width: 0 1.6px 1.6px 0;
  transform: rotate(45deg);
}

/* ---------- 页脚 ---------- */
.footer {
  position: relative;
  margin-top: 40px;
  border-top: 1px solid var(--c-border);
  background: linear-gradient(180deg, transparent, rgba(255, 9, 9, 0.045));
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 72px 24px 56px;
}
.brand--footer .brand__name { font-size: 18px; }
.footer__tagline {
  margin-top: 18px;
  color: var(--c-text-mute);
  font-size: 0.92rem;
}
.footer__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--c-text);
  margin-bottom: 20px;
}
.contact-list li,
.footer__links li { margin-bottom: 14px; }
.contact-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.contact-list__icon {
  width: 36px; height: 36px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--c-accent);
  background: rgba(255, 9, 9, 0.06);
  border: 1px solid var(--c-border);
}
.contact-list__icon svg { width: 18px; height: 18px; }
.contact-list__label { color: var(--c-text-mute); font-size: 0.85rem; }
.contact-list__value { color: var(--c-text); font-size: 0.96rem; }
.contact-list__link { transition: color var(--t-fast); }
.contact-list__link:hover { color: var(--c-accent); }

.footer__links a {
  color: var(--c-text-soft);
  font-size: 0.95rem;
  transition: color var(--t-fast), padding var(--t-fast);
}
.footer__links a:hover { color: var(--c-accent); padding-left: 6px; }

.footer__bottom {
  border-top: 1px solid var(--c-border);
}
.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 24px;
  font-size: 0.85rem;
  color: var(--c-text-mute);
}
.footer__meta { font-family: var(--font-head); letter-spacing: 0.16em; }
.footer__beian { color: inherit; text-decoration: none; transition: color var(--t-fast); }
.footer__beian:hover { color: var(--c-accent); text-decoration: underline; }

/* ---------- 滚动入场动画 ---------- */
/* 默认可见（无 JS / 爬虫友好）；仅在 <html class="js"> 时启用隐藏 + 入场动画 */
.reveal {
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- FAQ ---------- */
.faq { padding: 100px 0; }
.faq__inner { max-width: 820px; margin: 0 auto; }
.faq__list { display: flex; flex-direction: column; gap: 14px; }
.faq__item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.faq__item[open] {
  border-color: var(--c-border-strong);
  background: var(--c-surface-2);
}
.faq__q {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.02rem;
  color: var(--c-text);
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q::after {
  content: "+";
  flex-shrink: 0;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--c-accent);
  transition: transform var(--t-fast);
}
.faq__item[open] .faq__q::after { transform: rotate(45deg); }
.faq__a {
  padding: 0 24px 20px;
  color: var(--c-text-soft);
  font-size: 0.96rem;
  line-height: 1.75;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { grid-template-columns: 1fr; gap: 32px; }
  .hero__visual { order: -1; max-width: 420px; margin: 0 auto; }
  .hero { padding: 130px 0 70px; }
  .ops-cockpit__grid { grid-template-columns: 1fr; }
  .ops-flow { display: grid; grid-template-columns: repeat(3, 1fr); }
  .feature-showcase__grid { grid-template-columns: 1fr; }
  .feature-tabs { grid-template-columns: repeat(3, 1fr); }
  .device-stage { grid-template-columns: minmax(0, 1fr) 220px; }
}

@media (max-width: 768px) {
  .section { padding: 88px 0; }
  .section__head { margin-bottom: 48px; }

  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 20px 24px 28px;
    background: rgba(255, 251, 250, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--c-border);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t-med), transform var(--t-med);
  }
  .nav__links.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav__link { padding: 12px 14px; font-size: 15px; }
  .nav__link.is-active::after { display: none; }
  .nav__cta { margin: 8px 0 0; text-align: center; }

  .hero__stats { gap: 18px; flex-wrap: wrap; }
  .stat__sep { display: none; }
  .hero__actions .btn { flex: 1; }
  .ops-screen { order: 1; }
  .ops-flow {
    order: 2;
    display: grid;
    grid-template-columns: 1fr;
  }
  .ops-ai { order: 3; }
  .ops-flow__item {
    grid-template-columns: 40px 1fr;
    padding: 14px;
  }
  .ops-flow__index {
    width: 38px;
    height: 38px;
    border-radius: 12px;
  }
  .ops-flow h3 { font-size: 15px; }
  .ops-flow p { font-size: 12.5px; line-height: 1.55; }
  .ops-metrics { grid-template-columns: 1fr; }
  .ops-screen { min-height: 0; padding: 20px; border-radius: 22px; }
  .ops-screen__top {
    flex-direction: column;
    gap: 10px;
  }
  .ops-screen__top strong { font-size: 19px; }
  .ops-task { align-items: flex-start; flex-direction: column; gap: 6px; }
  .ops-task b { white-space: normal; }
  .ops-ai p {
    margin: 18px 0;
    font-size: 15px;
    line-height: 1.65;
  }
  .device-stage { order: 1; }
  .feature-tabs {
    order: 2;
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 4px;
    scroll-snap-type: x mandatory;
  }
  .feature-tab {
    min-height: 0;
    flex: 0 0 82%;
    scroll-snap-align: start;
  }
  .feature-insight { order: 3; }
  .device-stage {
    min-height: 0;
    grid-template-columns: 1fr;
    align-items: start;
    gap: 16px;
  }
  .pc-demo { min-height: 0; }
  .pc-demo__body { grid-template-columns: 1fr; }
  .pc-demo__side {
    display: flex;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }
  .pc-demo__side span { flex: 0 0 auto; }
  .pc-demo__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .pc-demo__head strong { font-size: 19px; }
  .pc-demo__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .pc-demo__cards div {
    min-height: 82px;
    padding: 12px 10px;
  }
  .pc-demo__cards b {
    font-size: 22px;
    letter-spacing: 0;
  }
  .pc-demo__table div {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .phone-demo {
    width: min(100%, 270px);
    justify-self: center;
  }
  .feature-insight {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid-2x2 { grid-template-columns: 1fr; }
  .cap { padding: 30px 26px; gap: 20px; }

  .about { grid-template-columns: 1fr; gap: 36px; }
  .about__visual { order: -1; }
  .about__badge { width: 200px; height: 200px; }
  .about__list { grid-template-columns: 1fr; }

  .footer__inner { grid-template-columns: 1fr; gap: 40px; padding: 56px 24px 40px; }
  .footer__bottom-inner { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 20px; }
  .cards { grid-template-columns: 1fr; }
  .hero__title { font-size: 2.3rem; }
  .card { padding: 30px 24px; }
  .ops-flow__item {
    grid-template-columns: 36px 1fr;
    gap: 12px;
  }
  .ops-flow__index {
    width: 34px;
    height: 34px;
    border-radius: 11px;
  }
  .ops-metric {
    min-height: 0;
    padding: 14px;
  }
  .ops-metric strong { font-size: 26px; }
  .feature-tab {
    flex-basis: 88%;
    grid-template-columns: 38px 1fr;
    padding: 14px;
    border-radius: 16px;
  }
  .feature-tab__num {
    width: 34px;
    height: 34px;
    border-radius: 11px;
  }
  .feature-tab strong,
  .feature-tab small { grid-column: 2; }
  .pc-demo__main { padding: 18px; }
  .pc-demo__bar b {
    max-width: 190px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .pc-demo__cards {
    grid-template-columns: 1fr;
  }
  .phone-demo__screen { min-height: 430px; }
}

/* ---------- 无障碍：尊重 reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .js .reveal { opacity: 1; transform: none; }
  .loop__ring--outer,
  .loop__flow path,
  .loop__node-ring,
  .about__badge-ring--2,
  .eyebrow__dot,
  .ops-screen__live i,
  .ops-task.is-active,
  .device-stage::before { animation: none !important; }
}

/* ============================================================
   留资表单（Lead form）
   ============================================================ */
.lead { padding: 100px 0 120px; }
.lead__inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.lead__intro .section__tag { margin-bottom: 18px; }
.lead__intro .section__title { text-align: left; margin-bottom: 18px; }
.lead__lede {
  color: var(--c-text-soft);
  font-size: 1.04rem;
  line-height: 1.8;
  margin-bottom: 26px;
  max-width: 440px;
}
.lead__points { display: flex; flex-direction: column; gap: 14px; }
.lead__points li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--c-text);
  font-size: 0.98rem;
}
.lead__bullet {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 10px var(--c-accent);
  flex-shrink: 0;
}

.lead__form {
  padding: 36px 34px;
  border-radius: var(--radius-lg);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field__label {
  font-size: 0.86rem;
  color: var(--c-text-soft);
  letter-spacing: 0.02em;
}
.field__label em {
  color: var(--c-accent);
  font-style: normal;
  margin-left: 2px;
}
.lead__form input,
.lead__form select,
.lead__form textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.96rem;
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
}
.lead__form input::placeholder,
.lead__form textarea::placeholder { color: var(--c-text-mute); }
.lead__form select { appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238A5B55' stroke-width='2.4'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 38px;
}
.lead__form select option { background: #FFFBFA; color: var(--c-text); }
.lead__form input:focus,
.lead__form select:focus,
.lead__form textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  background: rgba(255, 9, 9, 0.05);
  box-shadow: 0 0 0 3px rgba(255, 9, 9, 0.12);
}
.lead__form input.is-invalid,
.lead__form textarea.is-invalid {
  border-color: #FF6B6B;
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.12);
}
.lead__form textarea { resize: vertical; min-height: 80px; }

.lead__submit {
  margin-top: 4px;
  width: 100%;
  position: relative;
}
.lead__submit.is-loading {
  pointer-events: none;
  opacity: 0.75;
}
.lead__msg {
  font-size: 0.92rem;
  text-align: center;
  min-height: 1.2em;
  transition: color var(--t-fast);
}
.lead__msg[data-type="success"] { color: #4ade80; }
.lead__msg[data-type="error"] { color: #FF8585; }
.lead__fineprint {
  font-size: 0.78rem;
  color: var(--c-text-mute);
  text-align: center;
  line-height: 1.6;
}

/* 蜜罐字段：对人类视觉与辅助技术隐藏，但保留在 DOM 中以诱捕机器人 */
.hp {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

@media (max-width: 900px) {
  .lead__inner { grid-template-columns: 1fr; gap: 36px; }
  .lead__intro .section__title { text-align: center; }
  .lead__lede { margin-left: auto; margin-right: auto; }
  .lead__points { align-items: center; }
}
@media (max-width: 560px) {
  .form-row { grid-template-columns: 1fr; gap: 18px; }
  .lead__form { padding: 28px 22px; }
}