/* ========== 基础重置与变量 ========== */
:root {
  --color-primary: #1B3A6B;
  --color-primary-light: #2A5090;
  --color-primary-dark: #0F2647;
  --color-accent: #3A7BD5;
  --color-accent-light: #5B9BE8;
  --color-gold: #C9A962;
  --color-gold-light: #DCC082;

  --color-bg: #F7F8FA;
  --color-bg-alt: #FFFFFF;
  --color-bg-dark: #0E1E36;
  --color-bg-dark-2: #142846;

  --color-text: #1A2436;
  --color-text-2: #4A5870;
  --color-text-3: #7A88A0;
  --color-text-invert: #FFFFFF;
  --color-text-invert-2: #B8C5DB;

  --color-border: #E4E8F0;
  --color-border-dark: #2A3A55;

  --shadow-sm: 0 2px 8px rgba(27, 58, 107, 0.06);
  --shadow-md: 0 8px 24px rgba(27, 58, 107, 0.08);
  --shadow-lg: 0 16px 48px rgba(27, 58, 107, 0.12);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --font-serif: 'Noto Serif SC', 'Source Han Serif SC', serif;
  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

  --container-max: 1200px;
  --section-pad: 100px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  font-family: var(--font-sans);
  letter-spacing: 0.5px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s ease;
}

.btn-primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(27, 58, 107, 0.25);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-invert);
  border: 1.5px solid rgba(255,255,255,0.3);
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.08);
}

.btn-full {
  width: 100%;
  padding: 16px;
  font-size: 16px;
}

/* ========== 导航 ========== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-mark {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  position: relative;
}

.logo-mark::after {
  content: '';
  position: absolute;
  bottom: -2px;
  right: -2px;
  width: 10px;
  height: 10px;
  background: var(--color-gold);
  border-radius: 2px;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-links a {
  font-size: 14px;
  color: var(--color-text-2);
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(27, 58, 107, 0.2);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 72px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 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%);
}

.hero-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
}

.shape-1 {
  width: 500px;
  height: 500px;
  background: var(--color-accent);
  top: -100px;
  right: -100px;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: var(--color-gold);
  bottom: -100px;
  left: -50px;
  opacity: 0.2;
}

.shape-3 {
  width: 300px;
  height: 300px;
  background: var(--color-accent-light);
  top: 40%;
  left: 30%;
  opacity: 0.15;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 60px 40px;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 4px;
  color: var(--color-gold);
  font-weight: 500;
  margin-bottom: 24px;
  padding: 6px 16px;
  border: 1px solid rgba(201, 169, 98, 0.3);
  border-radius: 100px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 700;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 28px;
}

.accent-text {
  background: linear-gradient(135deg, var(--color-gold-light) 0%, var(--color-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 16px;
  color: var(--color-text-invert-2);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}

.stat-label {
  font-size: 13px;
  color: var(--color-text-invert-2);
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,0.15);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 500px;
}

.hero-card {
  position: absolute;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.hero-card-main {
  width: 75%;
  top: 0;
  right: 0;
  animation: floatMain 6s ease-in-out infinite;
}

@keyframes floatMain {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.card-badge {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 2;
  padding: 6px 14px;
  background: rgba(255,255,255,0.9);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  backdrop-filter: blur(10px);
}

.hero-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.card-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px rgba(74, 222, 128, 0.5);
}

.hero-card-sub {
  width: 60%;
  bottom: 0;
  left: 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: floatSub 5s ease-in-out infinite;
  animation-delay: 1s;
}

@keyframes floatSub {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.sub-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.sub-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sub-icon svg {
  width: 20px;
  height: 20px;
}

.sub-icon-1 { background: rgba(58, 123, 213, 0.3); color: #7db3f0; }
.sub-icon-2 { background: rgba(201, 169, 98, 0.3); color: var(--color-gold-light); }
.sub-icon-3 { background: rgba(74, 222, 128, 0.2); color: #86efac; }

.sub-text {
  display: flex;
  flex-direction: column;
}

.sub-title {
  font-size: 14px;
  color: #fff;
  font-weight: 500;
}

.sub-desc {
  font-size: 12px;
  color: var(--color-text-invert-2);
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.5);
  font-size: 11px;
  letter-spacing: 3px;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

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

.section-head {
  margin-bottom: 60px;
  max-width: 600px;
}

.section-head-center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--color-accent);
  margin-bottom: 16px;
  font-family: var(--font-sans);
}

.section-title {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 20px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  border-radius: 2px;
}

.section-head-center .section-title::after {
  left: 50%;
  transform: translateX(-50%);
}

.section-desc {
  font-size: 16px;
  color: var(--color-text-2);
  line-height: 1.8;
  margin-top: 8px;
}

/* ========== About ========== */
.about {
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-lead {
  font-size: 19px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 24px;
  padding-left: 20px;
  border-left: 3px solid var(--color-accent);
}

.about-text p {
  color: var(--color-text-2);
  margin-bottom: 18px;
  font-size: 15px;
}

.about-text strong {
  color: var(--color-primary);
  font-weight: 600;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.value-item {
  position: relative;
}

.value-num {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.1;
  position: absolute;
  top: -12px;
  left: 0;
  line-height: 1;
}

.value-item h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-text);
  position: relative;
  z-index: 1;
  font-family: var(--font-sans);
  font-weight: 600;
}

.value-item p {
  font-size: 13px;
  color: var(--color-text-3);
  line-height: 1.6;
  margin: 0;
}

/* About Visual */
.about-visual {
  position: relative;
}

.about-img-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.about-img-wrap:hover .about-img {
  transform: scale(1.05);
}

.about-img-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-md);
}

.badge-year {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.badge-text {
  font-size: 12px;
  color: var(--color-text-3);
  margin-top: 4px;
}

.about-accent-box {
  margin-top: 24px;
  padding: 28px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-lg);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-accent-box p {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.accent-dots {
  position: absolute;
  top: 20px;
  right: 20px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  opacity: 0.3;
}

.accent-dots span {
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  border-radius: 50%;
}

/* ========== Services ========== */
.services {
  background: var(--color-bg);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service-card {
  position: relative;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--color-border);
  transition: all 0.4s ease;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.service-icon svg {
  width: 28px;
  height: 28px;
}

.service-icon-1 { background: rgba(58, 123, 213, 0.12); color: var(--color-accent); }
.service-icon-2 { background: rgba(201, 169, 98, 0.15); color: var(--color-gold); }
.service-icon-3 { background: rgba(74, 222, 128, 0.12); color: #22a06b; }
.service-icon-4 { background: rgba(168, 85, 247, 0.12); color: #8b5cf6; }

.service-num {
  position: absolute;
  top: 32px;
  right: 36px;
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 700;
  color: var(--color-text);
  opacity: 0.06;
  line-height: 1;
}

.service-card h3 {
  font-size: 20px;
  margin-bottom: 14px;
  color: var(--color-text);
}

.service-card > p {
  font-size: 14px;
  color: var(--color-text-2);
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-list li {
  font-size: 13px;
  color: var(--color-text-3);
  padding: 5px 12px;
  background: var(--color-bg);
  border-radius: 100px;
  border: 1px solid var(--color-border);
}

/* ========== Cases ========== */
.cases {
  background: var(--color-bg-alt);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.case-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all 0.4s ease;
}

.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.case-card-large {
  grid-column: span 2;
  grid-row: span 2;
}

.case-card-wide {
  grid-column: span 2;
}

.case-img-wrap {
  position: relative;
  overflow: hidden;
}

.case-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.case-card-large .case-img {
  height: 320px;
}

.case-card:hover .case-img {
  transform: scale(1.08);
}

.case-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 5px 14px;
  background: rgba(27, 58, 107, 0.9);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  border-radius: 100px;
  backdrop-filter: blur(10px);
}

.case-content {
  padding: 28px;
}

.case-content h3 {
  font-size: 17px;
  margin-bottom: 12px;
  font-family: var(--font-sans);
  font-weight: 600;
}

.case-card-large .case-content h3 {
  font-size: 22px;
  margin-bottom: 16px;
}

.case-content p {
  font-size: 14px;
  color: var(--color-text-2);
  line-height: 1.7;
  margin-bottom: 20px;
}

.case-card-large .case-content p {
  font-size: 15px;
}

.case-metrics {
  display: flex;
  gap: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.metric {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.metric-label {
  font-size: 12px;
  color: var(--color-text-3);
  margin-top: 6px;
}

.case-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.case-tags span {
  font-size: 13px;
  padding: 5px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-2);
}

/* ========== Clients ========== */
.clients {
  background: var(--color-bg);
}

.clients-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 80px;
}

.client-item {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.client-item:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.client-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.client-icon svg {
  width: 24px;
  height: 24px;
}

.client-icon-1 { background: rgba(58, 123, 213, 0.12); color: var(--color-accent); }
.client-icon-2 { background: rgba(201, 169, 98, 0.15); color: var(--color-gold); }
.client-icon-3 { background: rgba(34, 197, 94, 0.12); color: #22c55e; }
.client-icon-4 { background: rgba(168, 85, 247, 0.12); color: #a855f7; }
.client-icon-5 { background: rgba(244, 63, 94, 0.12); color: #f43f5e; }
.client-icon-6 { background: rgba(14, 165, 233, 0.12); color: #0ea5e9; }

.client-item h4 {
  font-size: 17px;
  margin-bottom: 10px;
  font-family: var(--font-sans);
  font-weight: 600;
}

.client-item p {
  font-size: 13px;
  color: var(--color-text-3);
  line-height: 1.7;
}

/* 合作模式 */
.cooperation {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  padding: 56px 60px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cooperation::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(58, 123, 213, 0.2) 0%, transparent 70%);
  transform: translate(30%, -30%);
}

.cooperation .section-tag {
  color: var(--color-gold);
}

.cooperation h3 {
  font-size: 28px;
  color: #fff;
  margin: 12px 0 32px;
}

.coop-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.coop-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  transition: all 0.3s ease;
}

.coop-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(201, 169, 98, 0.3);
  transform: translateY(-3px);
}

.coop-index {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-gold);
  opacity: 0.7;
  min-width: 36px;
}

.coop-name {
  font-size: 14px;
  color: rgba(255,255,255,0.9);
  line-height: 1.5;
}

/* ========== Contact ========== */
.contact {
  background: var(--color-bg-alt);
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.contact-desc {
  font-size: 16px;
  color: var(--color-text-2);
  line-height: 1.8;
  margin: 8px 0 40px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 18px;
}

.contact-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  background: rgba(58, 123, 213, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.contact-item > div {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 13px;
  color: var(--color-text-3);
  margin-bottom: 2px;
}

.contact-value {
  font-size: 15px;
  color: var(--color-text);
  font-weight: 500;
}

/* Form Card */
.contact-form-card {
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.contact-form-card h3 {
  font-size: 24px;
  margin-bottom: 8px;
}

.form-subtitle {
  font-size: 14px;
  color: var(--color-text-3);
  margin-bottom: 32px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  color: var(--color-text-2);
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: #fff;
  transition: all 0.3s ease;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(58, 123, 213, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-3);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

.form-success {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--radius-sm);
  color: #16a34a;
  font-size: 14px;
}

.form-success.show {
  display: flex;
}

.form-success svg {
  width: 20px;
  height: 20px;
}

/* ========== Footer ========== */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.7);
  padding-top: 70px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 60px;
  padding-bottom: 50px;
  border-bottom: 1px solid var(--color-border-dark);
}

.footer-brand .nav-logo {
  margin-bottom: 20px;
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
}

.footer-col h5 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 24px;
  font-family: var(--font-sans);
  font-weight: 600;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
}

.footer-col ul li a:hover {
  color: var(--color-gold);
}

.footer-bottom {
  padding: 24px 0;
}

.footer-legal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
}

.footer-divider {
  opacity: 0.3;
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    height: 400px;
    max-width: 500px;
    margin: 0 auto;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 50px;
  }

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

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

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

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

  .case-card-large,
  .case-card-wide {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad: 60px;
  }

  .container {
    padding: 0 24px;
  }

  .nav-inner {
    padding: 0 24px;
    height: 64px;
  }

  .nav-links {
    display: none;
  }

  .hero-inner {
    padding: 40px 24px;
    gap: 40px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-num {
    font-size: 24px;
  }

  .hero-visual {
    height: 340px;
  }

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

  .cases-grid {
    grid-template-columns: 1fr;
  }

  .case-card-large,
  .case-card-wide {
    grid-column: span 1;
  }

  .clients-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cooperation {
    padding: 40px 28px;
  }

  .coop-grid {
    grid-template-columns: 1fr;
  }

  .about-values {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-form-card {
    padding: 32px 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .section-title {
    font-size: 28px;
  }

  .section-head {
    margin-bottom: 40px;
  }
}