/* ============================================
   武汉夺天科技 · AI 渐变(深空+霓虹)主题
   ============================================ */

:root {
  /* 背景 */
  --bg-0: #050514;
  --bg-1: #0a0e2a;
  --bg-2: #0d1133;

  /* 渐变主色 */
  --c-purple: #a855f7;
  --c-violet: #7c3aed;
  --c-blue: #3b82f6;
  --c-cyan: #06b6d4;
  --c-pink: #ec4899;

  /* 文字 */
  --t-1: #f1f5f9;
  --t-2: #cbd5e1;
  --t-3: #94a3b8;
  --t-4: #64748b;

  /* 表面 */
  --surface-1: rgba(15, 23, 42, 0.45);
  --surface-2: rgba(20, 27, 56, 0.55);
  --border-1: rgba(168, 85, 247, 0.18);
  --border-2: rgba(168, 85, 247, 0.35);
  --border-cyan: rgba(6, 182, 212, 0.35);

  /* 渐变 */
  --grad-primary: linear-gradient(135deg, #a855f7 0%, #3b82f6 50%, #06b6d4 100%);
  --grad-primary-soft: linear-gradient(135deg, rgba(168, 85, 247, 0.15) 0%, rgba(59, 130, 246, 0.15) 50%, rgba(6, 182, 212, 0.15) 100%);
  --grad-text: linear-gradient(135deg, #c4b5fd 0%, #93c5fd 40%, #67e8f9 100%);

  /* 阴影 / 光晕 */
  --shadow-glow: 0 0 60px -10px rgba(168, 85, 247, 0.45);
  --shadow-card: 0 20px 50px -20px rgba(0, 0, 0, 0.6), 0 0 0 1px var(--border-1);

  /* 尺寸 */
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family:
    "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Source Han Sans CN", "Noto Sans CJK SC", sans-serif;
  background: var(--bg-0);
  color: var(--t-1);
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; }

ul, ol { list-style: none; }

::selection { background: rgba(168, 85, 247, 0.4); color: #fff; }

/* ============================================
   背景层
   ============================================ */
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at top, var(--bg-2) 0%, var(--bg-0) 60%);
  overflow: hidden;
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  will-change: transform;
}
.glow-1 {
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.5) 0%, transparent 70%);
  animation: float1 18s ease-in-out infinite;
}
.glow-2 {
  top: 30%;
  right: -15%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.4) 0%, transparent 70%);
  animation: float2 22s ease-in-out infinite;
}
.glow-3 {
  bottom: -20%;
  left: 30%;
  width: 70vw;
  height: 70vw;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.35) 0%, transparent 70%);
  animation: float3 26s ease-in-out infinite;
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(168, 85, 247, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 85, 247, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.bg-noise {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5%, 10%) scale(1.1); }
}
@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-8%, 5%) scale(1.15); }
}
@keyframes float3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5%, -5%) scale(1.1); }
}

/* ============================================
   容器
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
}

/* ============================================
   导航
   ============================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(5, 5, 20, 0.6);
  border-bottom: 1px solid rgba(168, 85, 247, 0.12);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-cn {
  font-size: 15px;
  font-weight: 600;
  color: var(--t-1);
  letter-spacing: 0.5px;
}

.logo-en {
  font-size: 10px;
  font-weight: 500;
  color: var(--t-3);
  letter-spacing: 1.5px;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--t-2);
  transition: all 0.2s;
}

.nav-links a:hover {
  color: var(--t-1);
  background: rgba(168, 85, 247, 0.08);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
}

/* ============================================
   通用按钮
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: all 0.25s ease;
  white-space: nowrap;
  cursor: pointer;
}

.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-block { width: 100%; padding: 14px 22px; font-size: 15px; }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08) inset,
    0 8px 24px -8px rgba(168, 85, 247, 0.6);
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent 50%);
  opacity: 0;
  transition: opacity 0.3s;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.15) inset,
    0 12px 32px -8px rgba(168, 85, 247, 0.8);
}
.btn-primary:hover::before { opacity: 1; }

.btn-ghost {
  background: rgba(168, 85, 247, 0.08);
  color: var(--t-1);
  border: 1px solid var(--border-1);
}
.btn-ghost:hover {
  background: rgba(168, 85, 247, 0.15);
  border-color: var(--border-2);
  transform: translateY(-1px);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  padding: 80px 0 100px;
  position: relative;
}

.hero-content {
  text-align: center;
  max-width: 880px;
  margin: 0 auto 80px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(168, 85, 247, 0.1);
  border: 1px solid var(--border-1);
  font-size: 13px;
  color: var(--t-2);
  margin-bottom: 28px;
  letter-spacing: 0.5px;
}
.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 8px var(--c-cyan);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2.2rem, 5.2vw, 3.8rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.grad-text {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  color: var(--t-3);
  line-height: 1.8;
  max-width: 720px;
  margin: 0 auto 40px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 核心数据 */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1100px;
  margin: 0 auto;
}

.metric {
  padding: 28px 24px;
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  text-align: left;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}
.metric::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(168, 85, 247, 0.6), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.metric:hover {
  transform: translateY(-3px);
  border-color: var(--border-2);
  box-shadow: var(--shadow-glow);
}
.metric:hover::before { opacity: 1; }

.metric-num {
  font-size: clamp(2rem, 3.2vw, 2.6rem);
  font-weight: 700;
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 14px;
  font-feature-settings: "tnum";
}

.metric-label {
  font-size: 14px;
  color: var(--t-1);
  font-weight: 500;
  margin-bottom: 6px;
}

.metric-desc {
  font-size: 12.5px;
  color: var(--t-4);
  line-height: 1.5;
}

@media (max-width: 900px) {
  .metrics { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .hero { padding: 60px 0 80px; }
  .hero-content { margin-bottom: 60px; }
  .metrics { grid-template-columns: 1fr 1fr; gap: 12px; }
  .metric { padding: 22px 18px; }
}

/* ============================================
   通用区块
   ============================================ */
section { padding: 100px 0; position: relative; }
@media (max-width: 768px) { section { padding: 70px 0; } }

.section-head {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 70px;
}

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--c-cyan);
  margin-bottom: 18px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(1.8rem, 3.8vw, 2.6rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
  margin-bottom: 20px;
}

.section-sub {
  font-size: 1.0625rem;
  color: var(--t-3);
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto;
}

/* ============================================
   FDE 板块
   ============================================ */
.fde {
  background:
    linear-gradient(180deg, transparent 0%, rgba(13, 17, 51, 0.4) 50%, transparent 100%);
}

/* 差异化对比 */
.diff {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 90px;
}

.diff-col {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-1);
  background: var(--surface-1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
}

.diff-old { opacity: 0.7; }
.diff-new {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.12) 0%, rgba(6, 182, 212, 0.08) 100%);
  border-color: var(--border-2);
  box-shadow: var(--shadow-glow);
}

.diff-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(100, 116, 139, 0.2);
  font-size: 12px;
  font-weight: 500;
  color: var(--t-3);
  margin-bottom: 22px;
  letter-spacing: 0.5px;
}
.diff-tag-new {
  background: var(--grad-primary-soft);
  color: #fff;
  border: 1px solid var(--border-2);
}

.diff-list li {
  padding: 12px 0 12px 24px;
  font-size: 14.5px;
  color: var(--t-2);
  line-height: 1.6;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  position: relative;
}
.diff-list li:last-child { border-bottom: none; }
.diff-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20px;
  width: 12px;
  height: 2px;
  background: var(--t-4);
}
.diff-new .diff-list li::before {
  background: var(--c-cyan);
  box-shadow: 0 0 6px var(--c-cyan);
}

.diff-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-cyan);
  width: 40px;
  align-self: center;
}
.diff-arrow svg { width: 32px; height: 32px; }

@media (max-width: 900px) {
  .diff { grid-template-columns: 1fr; gap: 12px; }
  .diff-arrow { transform: rotate(90deg); height: 40px; width: 100%; }
}

/* 时间线 */
.timeline-head {
  text-align: center;
  margin-bottom: 50px;
}

.timeline-title {
  font-size: clamp(1.4rem, 2.5vw, 1.75rem);
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--t-1);
}

.timeline-sub {
  color: var(--t-3);
  font-size: 15px;
}

.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 14px;
  margin-bottom: 90px;
  padding: 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(168, 85, 247, 0.3) 10%,
    rgba(59, 130, 246, 0.3) 50%,
    rgba(6, 182, 212, 0.3) 90%,
    transparent 100%);
  z-index: 0;
}

.tl-item {
  position: relative;
  z-index: 1;
  text-align: center;
  padding-top: 70px;
}

.tl-marker {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-1);
  border: 2px solid var(--c-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  background-clip: padding-box;
  color: #fff;
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.4);
  transition: all 0.3s;
}
.tl-item:hover .tl-marker {
  transform: translateX(-50%) scale(1.1);
  box-shadow: 0 0 30px rgba(168, 85, 247, 0.7);
  background: linear-gradient(135deg, var(--c-purple), var(--c-blue));
}

.tl-body {
  padding: 16px 8px;
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all 0.3s;
}
.tl-item:hover .tl-body {
  border-color: var(--border-2);
  transform: translateY(-2px);
}

.tl-stage {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--c-cyan);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.tl-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--t-1);
  margin-bottom: 8px;
  line-height: 1.4;
}

.tl-desc {
  font-size: 12.5px;
  color: var(--t-3);
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .timeline { grid-template-columns: repeat(4, 1fr); }
  .timeline::before { display: none; }
}
@media (max-width: 640px) {
  .timeline { grid-template-columns: 1fr 1fr; }
  .tl-item { padding-top: 64px; }
  .tl-marker { width: 48px; height: 48px; font-size: 16px; }
}

/* 3 横切 */
.crosscuts {
  margin-bottom: 80px;
}

.crosscuts-head {
  text-align: center;
  margin-bottom: 36px;
}
.crosscuts-head h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--t-1);
}
.crosscuts-head p {
  color: var(--t-3);
  font-size: 14px;
}

.cross-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.cross-card {
  padding: 30px 26px;
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all 0.3s;
}
.cross-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-2);
  box-shadow: var(--shadow-glow);
}

.cross-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--grad-primary-soft);
  border: 1px solid var(--border-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-cyan);
  margin-bottom: 18px;
}
.cross-icon svg { width: 22px; height: 22px; }

.cross-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--t-1);
  margin-bottom: 10px;
}

.cross-card p {
  font-size: 14px;
  color: var(--t-3);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .cross-grid { grid-template-columns: 1fr; }
}

/* 核心交付物 */
.deliverables {
  text-align: center;
  padding: 50px 30px;
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}
.deliverables::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.deliverables-title {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 700;
  margin-bottom: 10px;
  position: relative;
}
.deliverables-sub {
  color: var(--t-3);
  font-size: 15px;
  margin-bottom: 36px;
  position: relative;
}

.deliver-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  position: relative;
}

.deliver-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: rgba(10, 14, 42, 0.5);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-md);
  font-size: 14.5px;
  color: var(--t-2);
  transition: all 0.25s;
  text-align: left;
}
.deliver-item:hover {
  background: rgba(20, 27, 56, 0.7);
  border-color: var(--border-cyan);
  transform: translateY(-1px);
}

.deliver-tag {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--grad-primary);
  color: #fff;
}

@media (max-width: 768px) {
  .deliver-grid { grid-template-columns: 1fr; }
}

/* ============================================
   联系板块
   ============================================ */
.contact {
  background:
    linear-gradient(180deg, transparent 0%, rgba(13, 17, 51, 0.5) 50%, transparent 100%);
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}

.contact-info .eyebrow { margin-bottom: 14px; }
.contact-info .section-title { text-align: left; margin-bottom: 18px; }
.contact-lead {
  color: var(--t-2);
  font-size: 15.5px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.contact-lead strong { color: var(--c-cyan); font-weight: 600; }

.contact-points {
  margin-bottom: 36px;
}
.contact-points li {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}
.contact-points li:last-child { border-bottom: none; }

.cp-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--grad-primary-soft);
  border: 1px solid var(--border-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-cyan);
  letter-spacing: 0.5px;
}
.contact-points strong {
  display: block;
  color: var(--t-1);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}
.contact-points span {
  color: var(--t-3);
  font-size: 13.5px;
  line-height: 1.6;
}

.contact-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 24px;
  padding: 24px;
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.meta-label {
  font-size: 12px;
  color: var(--t-4);
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  text-transform: uppercase;
}
.meta-value {
  font-size: 14px;
  color: var(--t-1);
  font-weight: 500;
}
.meta-value a {
  color: var(--c-cyan);
  transition: color 0.2s;
}
.meta-value a:hover { color: #67e8f9; }

/* 表单 */
.contact-form {
  padding: 36px 32px;
  background: var(--surface-1);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}
.contact-form::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-purple), var(--c-cyan), transparent);
}

.form-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--t-1);
}
.form-sub {
  font-size: 14px;
  color: var(--t-3);
  margin-bottom: 28px;
}

.field { margin-bottom: 18px; }
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 18px;
}
.field-row .field { margin-bottom: 0; }

.field label {
  display: block;
  font-size: 13px;
  color: var(--t-2);
  margin-bottom: 8px;
  font-weight: 500;
}
.req { color: var(--c-pink); margin-left: 2px; }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 14px;
  background: rgba(5, 5, 20, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 10px;
  color: var(--t-1);
  font-size: 14.5px;
  transition: all 0.2s;
  outline: none;
}
.field input::placeholder,
.field textarea::placeholder {
  color: var(--t-4);
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--c-purple);
  background: rgba(5, 5, 20, 0.8);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
}
.field textarea { resize: vertical; min-height: 90px; }
.field select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'><path d='M3 5l3 3 3-3' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-tip {
  font-size: 12px;
  color: var(--t-4);
  text-align: center;
  margin-top: 14px;
  line-height: 1.6;
}

@media (max-width: 900px) {
  .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 480px) {
  .contact-form { padding: 28px 22px; }
  .field-row { grid-template-columns: 1fr; gap: 18px; }
  .field-row .field { margin-bottom: 0; }
  .contact-meta { grid-template-columns: 1fr; }
}

/* ============================================
   页脚
   ============================================ */
.footer {
  padding: 36px 0 28px;
  border-top: 1px solid rgba(168, 85, 247, 0.12);
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-name { font-size: 14px; font-weight: 600; color: var(--t-1); }
.footer-tag { font-size: 12px; color: var(--t-3); margin-top: 2px; }

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}
.footer-links a {
  font-size: 13px;
  color: var(--t-3);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--c-cyan); }

.footer-legal {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--t-4);
}
.footer-legal .dot { color: var(--t-4); opacity: 0.5; }

@media (max-width: 768px) {
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-brand { flex-direction: column; gap: 8px; }
}

/* ============================================
   Toast
   ============================================ */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-1);
  border: 1px solid var(--border-cyan);
  color: var(--t-1);
  padding: 14px 22px;
  border-radius: 12px;
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 20px rgba(6, 182, 212, 0.3);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 90vw;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast::before {
  content: '✓';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--c-cyan);
  color: #050514;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
}

/* ============================================
   滚动渐入动画
   ============================================ */
[data-anim] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}
[data-anim].visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-anim] { opacity: 1; transform: none; }
}

/* ============================================
   小屏适配
   ============================================ */
@media (max-width: 480px) {
  body { font-size: 15px; }
  .hero-cta .btn { flex: 1; min-width: 140px; }
}