/* ========== 基础重置与变量 ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #0a0e1a;
  --color-bg-soft: #0f1424;
  --color-bg-card: #131a2c;
  --color-bg-elev: #1a2238;
  --color-line: rgba(255, 255, 255, 0.08);
  --color-line-soft: rgba(255, 255, 255, 0.04);

  --color-text: #e8ecf3;
  --color-text-soft: #a3acc2;
  --color-text-mute: #6b7488;

  --color-primary: #00e0c6;
  --color-primary-2: #00b3d4;
  --color-accent: #ff8a3d;
  --color-warning: #ffb84d;
  --color-success: #2ee6a4;

  --gradient-primary: linear-gradient(135deg, #00e0c6 0%, #00b3d4 100%);
  --gradient-dark: linear-gradient(180deg, #0a0e1a 0%, #131a2c 100%);
  --gradient-glow: radial-gradient(
    ellipse at top,
    rgba(0, 224, 198, 0.15) 0%,
    transparent 60%
  );

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 60px rgba(0, 224, 198, 0.15);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --font-display:
    "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Hiragino Sans GB",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body:
    "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Hiragino Sans GB",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Roboto Mono", Consolas, monospace;

  --header-h: 72px;
  --container-w: 1240px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(
      ellipse 80% 60% at 20% 0%,
      rgba(0, 224, 198, 0.06) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse 60% 50% at 80% 30%,
      rgba(0, 179, 212, 0.05) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse 50% 40% at 50% 100%,
      rgba(255, 138, 61, 0.04) 0%,
      transparent 50%
    );
  pointer-events: none;
  z-index: 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s var(--ease);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--space-5);
  position: relative;
  z-index: 1;
}

/* ========== 顶部导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: all 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-line);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--color-text);
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  position: relative;
}

.brand-mark__name {
  position: relative;
  display: inline-block;
}

.brand-mark__name sup {
  font-size: 0.5em;
  color: var(--color-primary);
  margin-left: 2px;
  vertical-align: super;
  font-weight: 500;
}

.brand-mark__divider {
  color: var(--color-text-mute);
  margin: 0 8px;
  font-weight: 300;
}

.brand-mark__suffix {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.95em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
}

.nav-menu a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.95rem;
  color: var(--color-text-soft);
  border-radius: var(--radius-sm);
  transition: all 0.3s var(--ease);
  position: relative;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all 0.3s var(--ease);
  transform: translateX(-50%);
  border-radius: 2px;
}

.nav-menu a:hover,
.nav-menu a.is-active {
  color: var(--color-text);
}

.nav-menu a:hover::after,
.nav-menu a.is-active::after {
  width: calc(100% - 28px);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 9px 18px;
  background: rgba(0, 224, 198, 0.08);
  border: 1px solid rgba(0, 224, 198, 0.3);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s var(--ease);
}

.nav-cta:hover {
  background: rgba(0, 224, 198, 0.15);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-bg-elev);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-text);
  position: relative;
  transition: all 0.3s var(--ease);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--color-text);
  transition: all 0.3s var(--ease);
}

.nav-toggle span::before {
  top: -6px;
}
.nav-toggle span::after {
  top: 6px;
}

.nav-toggle.is-open span {
  background: transparent;
}
.nav-toggle.is-open span::before {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle.is-open span::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  padding: calc(var(--header-h) + var(--space-9)) 0 var(--space-9);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(
    ellipse 80% 60% at 50% 50%,
    #000 30%,
    transparent 80%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 50%,
    #000 30%,
    transparent 80%
  );
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  pointer-events: none;
  animation: orb-float 12s ease-in-out infinite;
}

.hero-orb--1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 224, 198, 0.4), transparent 70%);
  top: -200px;
  right: -100px;
}

.hero-orb--2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(0, 179, 212, 0.3), transparent 70%);
  bottom: -100px;
  left: -100px;
  animation-delay: -6s;
}

@keyframes orb-float {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(30px, -30px) scale(1.1);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 16px;
  background: rgba(0, 224, 198, 0.08);
  border: 1px solid rgba(0, 224, 198, 0.25);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  font-weight: 500;
  letter-spacing: 0.5px;
}

.hero-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.2);
  }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.6vw, 3.8rem);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: var(--space-5);
  text-wrap: balance;
}

.hero-title .gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  position: relative;
}

.hero-title .underline {
  position: relative;
  display: inline-block;
}

.hero-title__row {
  display: inline-block;
  margin-top: 0.2em;
}

.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--color-text-soft);
  max-width: 720px;
  margin: 0 auto var(--space-7);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-9);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn--primary {
  background: var(--gradient-primary);
  color: #0a0e1a;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0, 224, 198, 0.25);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 224, 198, 0.35);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-line);
}

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

.btn-icon {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  padding: var(--space-6);
  background: rgba(19, 26, 44, 0.5);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  max-width: 880px;
  margin: 0 auto;
}

.hero-stat {
  text-align: center;
  position: relative;
}

.hero-stat::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 32px;
  background: var(--color-line);
}

.hero-stat:last-child::after {
  display: none;
}

.hero-stat__num {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  display: block;
}

.hero-stat__label {
  font-size: 0.85rem;
  color: var(--color-text-mute);
  margin-top: 4px;
  letter-spacing: 0.5px;
}

/* ========== 通用 Section ========== */
.section {
  padding: var(--space-9) 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto var(--space-8);
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  position: relative;
  padding: 0 24px;
}

.section-eyebrow::before,
.section-eyebrow::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 16px;
  height: 1px;
  background: var(--color-primary);
  opacity: 0.5;
}

.section-eyebrow::before {
  left: 0;
}
.section-eyebrow::after {
  right: 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: var(--space-4);
}

.section-title .gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-soft);
  line-height: 1.8;
}

/* ========== GEO 价值主张 ========== */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.value-card {
  position: relative;
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  transition: all 0.4s var(--ease);
  overflow: hidden;
}

.value-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.value-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 224, 198, 0.3);
  box-shadow: var(--shadow-lg);
}

.value-card:hover::before {
  transform: scaleX(1);
}

.value-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(0, 224, 198, 0.1);
  border: 1px solid rgba(0, 224, 198, 0.2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.value-icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.8;
}

.value-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.value-card p {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  line-height: 1.7;
}

/* ========== 服务范围 ========== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

.service-card {
  position: relative;
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  display: flex;
  gap: var(--space-5);
  transition: all 0.4s var(--ease);
  overflow: hidden;
}

.service-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    transparent 0%,
    rgba(0, 224, 198, 0.03) 100%
  );
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}

.service-card:hover {
  border-color: rgba(0, 224, 198, 0.3);
  transform: translateX(4px);
}

.service-card:hover::after {
  opacity: 1;
}

.service-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  flex-shrink: 0;
  width: 56px;
  opacity: 0.7;
}

.service-body h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.service-body p {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.service-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.78rem;
  color: var(--color-text-mute);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-line);
  border-radius: 100px;
}

/* ========== AI 平台覆盖 ========== */
.platforms-section {
  background: linear-gradient(
    180deg,
    var(--color-bg) 0%,
    var(--color-bg-soft) 100%
  );
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
}

.platform-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-5) var(--space-3);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all 0.3s var(--ease);
  font-size: 0.9rem;
  color: var(--color-text-soft);
}

.platform-item:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 224, 198, 0.1);
}

.platform-emoji {
  font-size: 1.6rem;
  display: block;
  line-height: 1;
}

/* ========== 服务流程 ========== */
.process-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-7);
}

.process-timeline::before {
  content: "";
  position: absolute;
  left: 8.33%;
  right: 8.33%;
  top: 28px;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-primary) 15%,
    var(--color-primary) 85%,
    transparent 100%
  );
  opacity: 0.4;
  z-index: 0;
}

.process-step {
  position: relative;
  z-index: 1;
  text-align: center;
}

.process-step__num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 2px solid var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  position: relative;
  transition: all 0.3s var(--ease);
}

.process-step:hover .process-step__num {
  background: var(--color-primary);
  color: var(--color-bg);
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(0, 224, 198, 0.5);
}

.process-step h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.process-step p {
  font-size: 0.88rem;
  color: var(--color-text-soft);
  line-height: 1.6;
}

/* ========== 效果展示 ========== */
.effect-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.effect-card {
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.effect-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 50% 0%,
    rgba(0, 224, 198, 0.1) 0%,
    transparent 70%
  );
}

.effect-num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  position: relative;
  display: block;
  margin-bottom: var(--space-3);
}

.effect-num .unit {
  font-size: 0.5em;
  color: var(--color-text-soft);
  -webkit-text-fill-color: var(--color-text-soft);
  font-weight: 600;
  margin-left: 2px;
}

.effect-label {
  font-size: 0.95rem;
  color: var(--color-text-soft);
  position: relative;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}

.case-card {
  padding: var(--space-6);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  transition: all 0.3s var(--ease);
}

.case-card:hover {
  border-color: rgba(0, 224, 198, 0.3);
  transform: translateY(-4px);
}

.case-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(0, 224, 198, 0.1);
  border: 1px solid rgba(0, 224, 198, 0.2);
  border-radius: 100px;
  font-size: 0.78rem;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.case-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.case-card p {
  font-size: 0.92rem;
  color: var(--color-text-soft);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.case-meta {
  display: flex;
  gap: var(--space-4);
  font-size: 0.85rem;
  color: var(--color-text-mute);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-line);
}

.case-meta strong {
  color: var(--color-primary);
  font-weight: 600;
}

/* ========== 关于闫宝龙 ========== */
.about-section {
  background: var(--color-bg-soft);
}

.about-inner {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-8);
  align-items: start;
}

.about-photo {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.about-photo:hover img {
  transform: scale(1.04);
}

.about-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 60%,
    rgba(10, 14, 26, 0.4) 100%
  );
  pointer-events: none;
}

.about-photo__signature {
  position: absolute;
  bottom: 16px;
  left: 16px;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

.about-photo__role {
  position: absolute;
  bottom: 50px;
  left: 16px;
  font-size: 0.85rem;
  color: var(--color-primary);
  z-index: 2;
  letter-spacing: 1px;
}

.about-body h3 {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.about-body h3 .gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-body > p {
  font-size: 1.05rem;
  color: var(--color-text-soft);
  line-height: 1.85;
  margin-bottom: var(--space-6);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.about-highlight {
  padding: var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: all 0.3s var(--ease);
}

.about-highlight:hover {
  border-color: rgba(0, 224, 198, 0.3);
  transform: translateX(4px);
}

.about-highlight__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0, 224, 198, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.about-highlight__icon svg {
  width: 20px;
  height: 20px;
}

.about-highlight h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.about-highlight p {
  font-size: 0.82rem;
  color: var(--color-text-mute);
}

.timeline {
  list-style: none;
  position: relative;
  padding-left: var(--space-5);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    180deg,
    var(--color-primary) 0%,
    transparent 100%
  );
}

.timeline li {
  position: relative;
  padding: var(--space-2) 0;
  font-size: 0.95rem;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-primary);
}

.timeline li strong {
  color: var(--color-primary);
  font-weight: 600;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s var(--ease);
}

.faq-item.is-open {
  border-color: rgba(0, 224, 198, 0.3);
}

.faq-question {
  width: 100%;
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  transition: color 0.3s var(--ease);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-right: var(--space-3);
  flex-shrink: 0;
}

.faq-question__text {
  flex: 1;
}

.faq-question__icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.3s var(--ease);
  position: relative;
}

.faq-question__icon::before,
.faq-question__icon::after {
  content: "";
  position: absolute;
  background: var(--color-primary);
  transition: all 0.3s var(--ease);
}

.faq-question__icon::before {
  width: 10px;
  height: 1.5px;
}

.faq-question__icon::after {
  width: 1.5px;
  height: 10px;
}

.faq-item.is-open .faq-question__icon {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.faq-item.is-open .faq-question__icon::before,
.faq-item.is-open .faq-question__icon::after {
  background: var(--color-bg);
}

.faq-item.is-open .faq-question__icon::after {
  transform: scaleY(0);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}

.faq-answer__inner {
  padding: 0 var(--space-6) var(--space-5);
  padding-left: calc(var(--space-6) + 28px + var(--space-3));
  color: var(--color-text-soft);
  font-size: 0.96rem;
  line-height: 1.85;
}

/* ========== 联系方式 ========== */
.contact-section {
  background: linear-gradient(
    180deg,
    var(--color-bg) 0%,
    var(--color-bg-soft) 100%
  );
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-7);
  align-items: start;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.contact-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease);
  text-decoration: none;
}

.contact-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 224, 198, 0.1);
}

.contact-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(0, 224, 198, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-card__icon svg {
  width: 22px;
  height: 22px;
}

.contact-card__body {
  flex: 1;
  min-width: 0;
}

.contact-card__label {
  font-size: 0.82rem;
  color: var(--color-text-mute);
  margin-bottom: 2px;
}

.contact-card__value {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  word-break: break-all;
}

.qr-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
}

.qr-card img {
  width: 220px;
  height: 220px;
  margin: 0 auto var(--space-3);
  border-radius: var(--radius-sm);
  background: white;
  padding: 8px;
}

.qr-card h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.qr-card p {
  font-size: 0.88rem;
  color: var(--color-text-soft);
  line-height: 1.6;
}

/* ========== 更多服务矩阵 ========== */
.services-matrix {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
}

.services-matrix a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--color-text-soft);
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

.services-matrix a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--gradient-primary);
  transition: width 0.3s var(--ease);
  opacity: 0.1;
}

.services-matrix a:hover {
  color: var(--color-primary);
  border-color: rgba(0, 224, 198, 0.3);
  transform: translateY(-2px);
}

.services-matrix a:hover::before {
  width: 4px;
}

.services-matrix a .arrow {
  margin-left: auto;
  opacity: 0.4;
  transition: all 0.3s var(--ease);
}

.services-matrix a:hover .arrow {
  opacity: 1;
  transform: translateX(2px);
}

/* ========== 底部 ========== */
.site-footer {
  background: #060912;
  padding: var(--space-8) 0 var(--space-5);
  border-top: 1px solid var(--color-line);
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.footer-desc {
  font-size: 0.92rem;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: var(--space-4);
  max-width: 360px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.88rem;
  color: var(--color-text-soft);
}

.footer-contact a:hover {
  color: var(--color-primary);
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  font-size: 0.88rem;
  color: var(--color-text-soft);
  transition: color 0.3s var(--ease);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-size: 0.85rem;
  color: var(--color-text-mute);
  text-align: center;
}

.footer-bottom a {
  color: var(--color-text-mute);
  transition: color 0.3s var(--ease);
}

.footer-bottom a:hover {
  color: var(--color-primary);
}

.footer-copyright {
  font-size: 0.92rem;
  color: var(--color-text-soft);
}

.footer-copyright a {
  color: var(--color-primary);
}

.footer-records {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
  align-items: center;
}

.footer-records a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-records svg {
  width: 14px;
  height: 14px;
}

/* ========== 滚动入场动效 ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s var(--ease),
    transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal[data-delay="1"] {
  transition-delay: 0.1s;
}
.reveal[data-delay="2"] {
  transition-delay: 0.2s;
}
.reveal[data-delay="3"] {
  transition-delay: 0.3s;
}
.reveal[data-delay="4"] {
  transition-delay: 0.4s;
}
.reveal[data-delay="5"] {
  transition-delay: 0.5s;
}
.reveal[data-delay="6"] {
  transition-delay: 0.6s;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .platform-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
  }
  .process-timeline::before {
    display: none;
  }
  .effect-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-inner {
    grid-template-columns: 240px 1fr;
    gap: var(--space-6);
  }
  .contact-inner {
    grid-template-columns: 1fr;
  }
  .services-matrix {
    grid-template-columns: repeat(4, 1fr);
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
    --space-9: 64px;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .nav-menu,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-menu.is-open {
    display: flex;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--space-5);
    border-bottom: 1px solid var(--color-line);
    align-items: stretch;
    gap: 0;
    z-index: 99;
  }

  .nav-menu.is-open a {
    padding: 14px;
    text-align: center;
    border-bottom: 1px solid var(--color-line);
  }

  .nav-menu.is-open a:last-child {
    border-bottom: none;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .hero-stat:nth-child(2)::after {
    display: none;
  }

  .value-grid,
  .service-grid,
  .case-grid,
  .effect-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .platform-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-inner {
    grid-template-columns: 1fr;
  }

  .about-photo {
    max-width: 240px;
    margin: 0 auto;
  }

  .about-highlights {
    grid-template-columns: 1fr;
  }

  .services-matrix {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.2rem;
  }

  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-timeline {
    grid-template-columns: 1fr;
  }

  .services-matrix {
    grid-template-columns: 1fr;
  }
}