/* 基础样式 */
* {
 margin: 0;
 padding: 0;
 box-sizing: border-box;
}

:root {
 --primary-color: #1a1a2e;
 --secondary-color: #16213e;
 --accent-color: #c9a961;
 --accent-light: #d4b86d;
 --text-dark: #1a1a2e;
 --text-light: #a0a0a0;
 --text-muted: #6b7280;
 --white: #ffffff;
 --bg-light: #fafafa;
 --bg-dark: #0f0f1a;
 --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
 --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
 --shadow-gold: 0 4px 20px rgba(201, 169, 97, 0.3);
}

body {
 font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
 line-height: 1.7;
 color: var(--text-dark);
 overflow-x: hidden;
 background: var(--white);
}

.container {
 max-width: 1280px;
 margin: 0 auto;
 padding: 0 30px;
}

/* 导航栏 */
.navbar {
 background: rgba(255, 255, 255, 0.98);
 box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
 position: fixed;
 top: 0;
 left: 0;
 right: 0;
 z-index: 1000;
 padding: 1rem 0;
 backdrop-filter: blur(10px);
}

.navbar .container {
 display: flex;
 justify-content: space-between;
 align-items: center;
 position: relative;
}

.navbar .logo {
 text-decoration: none;
 color: inherit;
}

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

.logo-en {
 font-family: 'Didot', 'Bodoni MT', serif;
 font-size: 2.2rem;
 font-weight: 300;
 color: var(--primary-color);
 letter-spacing: 6px;
 text-transform: uppercase;
}

.logo-cn {
 font-family: 'PingFang SC', 'Microsoft YaHei', serif;
 font-size: 0.95rem;
 color: var(--accent-color);
 letter-spacing: 12px;
 font-weight: 300;
 margin-top: 4px;
}

.nav-links {
 display: flex;
 flex-wrap: nowrap;
 list-style: none;
 gap: 2rem;
 white-space: nowrap;
}

.nav-links a {
 text-decoration: none;
 color: var(--text-dark);
 font-weight: 400;
 font-size: 0.9rem;
 letter-spacing: 2px;
 transition: all 0.3s ease;
 position: relative;
 padding: 0.5rem 0;
}

.nav-links a::after {
 content: '';
 position: absolute;
 bottom: 0;
 left: 0;
 width: 0;
 height: 1px;
 background: var(--accent-color);
 transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.mobile-menu-btn {
 display: none;
 background: none;
 border: none;
 font-size: 1.5rem;
 color: var(--text-dark);
 cursor: pointer;
 padding: 10px;
}

/* 首页 / 主图 */
.hero {
 min-height: 100vh;
 background: linear-gradient(135deg, rgba(26, 26, 46, 0.92) 0%, rgba(22, 33, 62, 0.88) 100%),
 url('../images/主图背景.png?w=1920') center/cover no-repeat fixed;
 display: flex;
 align-items: center;
 justify-content: center;
 position: relative;
 margin-top: 80px;
}

.hero::before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 background: url('../images/主图背景-遮罩层.png') center/cover no-repeat;
 opacity: 0.5;
 pointer-events: none;
 z-index: 0;
}

.hero-content {
 position: relative;
 z-index: 1;
 color: var(--white);
 text-align: center;
 padding: 2rem;
 max-width: 900px;
}

.hero-title {
 font-family: 'Didot', 'Bodoni MT', serif;
 font-size: 5.5rem;
 font-weight: 300;
 margin-bottom: 1.5rem;
 line-height: 1.15;
 letter-spacing: 8px;
 color: var(--white);
 white-space: nowrap;
}

.hero-subtitle {
 font-size: 1rem;
 font-weight: 300;
 letter-spacing: 12px;
 margin-bottom: 1rem;
 color: var(--accent-color);
 text-transform: uppercase;
}

.hero-desc {
 font-size: 1.15rem;
 font-weight: 300;
 margin-bottom: 3.5rem;
 opacity: 0.85;
 line-height: 2;
 letter-spacing: 1px;
 color: var(--text-light);
}

.hero-divider {
 width: 80px;
 height: 1px;
 background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
 margin: 0 auto 2.5rem;
}

.hero-buttons {
 display: flex;
 gap: 2rem;
 justify-content: center;
 margin-bottom: 5rem;
}

.btn {
 padding: 18px 50px;
 border: none;
 font-size: 0.9rem;
 font-weight: 300;
 cursor: pointer;
 transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
 text-decoration: none;
 display: inline-block;
 letter-spacing: 3px;
 text-transform: uppercase;
}

.btn-primary {
 background: var(--accent-color);
 color: var(--primary-color);
 border: 1px solid var(--accent-color);
}

.btn-primary:hover {
 background: transparent;
 color: var(--accent-color);
 box-shadow: var(--shadow-gold);
}

.btn-secondary {
 background: transparent;
 color: var(--white);
 border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
 background: var(--white);
 color: var(--primary-color);
 border-color: var(--white);
}

.hero-stats {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 3rem;
 padding: 3rem 0;
 border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
 display: flex;
 flex-direction: column;
 align-items: center;
}

.stat-number {
 font-family: 'Didot', 'Bodoni MT', serif;
 font-size: 3.5rem;
 font-weight: 300;
 color: var(--accent-color);
 margin-bottom: 0.8rem;
 line-height: 1;
}

.stat-label {
 font-size: 0.85rem;
 opacity: 0.6;
 letter-spacing: 3px;
 text-transform: uppercase;
}

/* 客群画像 */
.audience {
 background: var(--white);
 padding: 120px 0;
}

.audience-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 3rem;
}

.audience-item {
 text-align: center;
 padding: 3rem 2rem;
 transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
 position: relative;
}

.audience-item::before {
 content: '';
 position: absolute;
 top: 0;
 left: 50%;
 transform: translateX(-50%);
 width: 0;
 height: 2px;
 background: var(--accent-color);
 transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.audience-item:hover::before {
 width: 60px;
}

.audience-item:hover {
 transform: translateY(-10px);
}

.audience-item-icon {
 width: 70px;
 height: 70px;
 background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
 border-radius: 50%;
 display: flex;
 align-items: center;
 justify-content: center;
 margin: 0 auto 2rem;
}

.audience-item-icon i {
 font-size: 1.8rem;
 color: var(--accent-color);
}

.audience-item-icon-img {
 width: 2.5rem;
 height: 2.5rem;
 object-fit: contain;
 display: block;
}

.audience-item h3 {
 margin-bottom: 1rem;
 color: var(--primary-color);
 font-size: 1.2rem;
 font-weight: 400;
 letter-spacing: 2px;
}

.audience-item p {
 color: var(--text-muted);
 font-size: 0.9rem;
 line-height: 1.8;
 font-weight: 300;
}

/* 通用区块样式 */
section {
 padding: 120px 0;
}


.section-title {
 font-family: 'Didot', 'Bodoni MT', serif;
 font-size: 3rem;
 text-align: center;
 margin-bottom: 1rem;
 color: var(--primary-color);
 font-weight: 300;
 letter-spacing: 4px;
}

.section-subtitle {
 text-align: center;
 color: var(--text-muted);
 margin-bottom: 5rem;
 font-size: 0.95rem;
 letter-spacing: 2px;
 font-weight: 300;
}

.section-divider {
 width: 60px;
 height: 1px;
 background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
 margin: 2rem auto;
}

/* 核心优势 */
.core-advantages {
 background: var(--bg-light);
}

/* 核心优势第一块：1图 + 3平行圆形半透明气泡 */
.core-advantages-block {
 margin-bottom: 4rem;
}

.core-advantages-hero-image {
 width: 100%;
 margin-bottom: 3rem;
 border-radius: 0;
 overflow: hidden;
}

.core-advantages-hero-image img {
 width: 100%;
 height: auto;
 display: block;
 object-fit: cover;
}

.core-advantages-bubbles {
 display: flex;
 flex-wrap: nowrap;
 justify-content: space-between;
 align-items: stretch;
 width: 100%;
}

.core-advantages-bubble {
 width: 320px;
 height: 320px;
 flex-shrink: 0;
 border-radius: 50%;
 background: rgba(255, 255, 255, 0.25);
 backdrop-filter: blur(8px);
 border: 1px solid rgba(255, 255, 255, 0.4);
 padding: 2rem;
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: center;
 text-align: center;
 transition: all 0.4s ease;
 box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
 box-sizing: border-box;
}

.core-advantages-bubble:hover {
 background: rgba(255, 255, 255, 0.35);
 transform: translateY(-6px);
 box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.core-advantages-bubble .core-advantages-bubble-icon {
 width: 4rem;
 height: 4rem;
 object-fit: contain;
 margin-bottom: 1.25rem;
}

.core-advantages-bubble h3 {
 margin-bottom: 0.75rem;
 color: var(--primary-color);
 font-size: 1.15rem;
 font-weight: 400;
 letter-spacing: 1px;
}

.core-advantages-bubble p {
 color: var(--text-muted);
 font-size: 0.9rem;
 line-height: 1.75;
 font-weight: 300;
 margin: 0;
}

@media (max-width: 768px) {
 .core-advantages-bubbles {
  flex-direction: column;
  align-items: center;
  gap: 2rem;
 }
 .core-advantages-bubble {
  width: 280px;
  height: 280px;
 }
}

.core-advantages-grid {
 display: grid;
 grid-template-columns: repeat(2, 1fr);
 gap: 2rem;
}

.core-advantages-card {
 background: var(--white);
 border-radius: 0;
 padding: 4rem 3.5rem;
 position: relative;
 overflow: hidden;
 transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
 box-shadow: var(--shadow);
}

.core-advantages-card::before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 background: linear-gradient(135deg, rgba(201, 169, 97, 0.03), transparent);
 opacity: 0;
 transition: opacity 0.5s ease;
}

.core-advantages-card:hover::before {
 opacity: 1;
}

.core-advantages-card:hover {
 transform: translateY(-8px);
 box-shadow: var(--shadow-lg);
}

.core-advantages-card-number {
 position: absolute;
 top: 2.5rem;
 right: 2.5rem;
 font-family: 'Didot', 'Bodoni MT', serif;
 font-size: 5rem;
 font-weight: 200;
 color: rgba(26, 26, 46, 0.03);
 line-height: 1;
 letter-spacing: 2px;
}

.core-advantages-card-content i {
 font-size: 2.8rem;
 color: var(--accent-color);
 margin-bottom: 2rem;
}

.core-advantages-card-content img.core-advantages-card-icon {
 width: 3.5rem;
 height: 3.5rem;
 object-fit: contain;
 margin-bottom: 2rem;
 display: block;
}

.core-advantages-card-content h3 {
 margin-bottom: 1.2rem;
 color: var(--primary-color);
 font-size: 1.6rem;
 font-weight: 400;
 letter-spacing: 2px;
}

.core-advantages-card-content p {
 color: var(--text-muted);
 line-height: 2;
 font-weight: 300;
 font-size: 0.95rem;
}

/* 奢华座驾 */
.product-matrix {
 background: var(--white);
}

.product-matrix-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 2.5rem;
}

.product-matrix-card {
 background: var(--white);
 overflow: hidden;
 transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
 box-shadow: var(--shadow);
}

.product-matrix-card:hover {
 transform: translateY(-10px);
 box-shadow: var(--shadow-lg);
}

.product-matrix-image {
 height: 420px;
 overflow: hidden;
 position: relative;
 display: flex;
 align-items: flex-end;
 justify-content: center;
 background: var(--bg-light);
}

.product-matrix-image img {
 width: 100%;
 height: auto;
 max-height: 420px;
 display: block;
 object-fit: contain;
 object-position: bottom center;
 transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-matrix-card:hover .product-matrix-image img {
 transform: scale(1.05);
}

.product-matrix-info {
 padding: 2.5rem;
 text-align: center;
}

.product-matrix-info h3 {
 margin-bottom: 0.5rem;
 font-size: 1.8rem;
 font-weight: 400;
 letter-spacing: 2px;
 background: linear-gradient(135deg, rgba(201, 169, 97, 0.92), var(--accent-color), var(--accent-light));
 -webkit-background-clip: text;
 background-clip: text;
 color: transparent;
}

.product-matrix-type {
 color: var(--accent-color);
 font-size: 0.85rem;
 font-weight: 300;
 letter-spacing: 4px;
 margin-bottom: 1.2rem;
 display: block;
 text-transform: uppercase;
}

.product-matrix-desc {
 color: var(--text-muted);
 margin-bottom: 1.8rem;
 font-size: 0.95rem;
 font-weight: 300;
 line-height: 1.8;
}

.product-matrix-specs {
 display: flex;
 gap: 3rem;
 padding-top: 1.5rem;
 border-top: 1px solid rgba(0, 0, 0, 0.08);
 justify-content: center;
}

.product-matrix-specs span {
 color: var(--text-muted);
 font-size: 0.9rem;
 letter-spacing: 1px;
}

.product-matrix-specs i {
 color: var(--accent-color);
 margin-right: 0.5rem;
}

/* 车型展示 */
.vehicle-showcase {
 background: var(--bg-light);
}

.vehicle-showcase-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 2.5rem;
 align-items: stretch;
}

.vehicle-showcase-card {
 background: var(--white);
 overflow: hidden;
 transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
 border-radius: 12px;
 border: none;
 box-shadow: none;
}

.vehicle-showcase-card:hover {
 transform: translateY(-10px);
 border-radius: 12px;
}

.vehicle-showcase-image {
 overflow: hidden;
 position: relative;
 line-height: 0;
 height: 100%;
 display: flex;
 align-items: center;
 justify-content: center;
}

.vehicle-showcase-image img {
 width: auto;
 height: 100%;
 max-width: 100%;
 object-fit: contain;
 display: block;
 transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.vehicle-showcase-card:hover .vehicle-showcase-image img {
 transform: scale(1.05);
}

.vehicle-showcase-image-label {
 position: absolute;
 right: 2rem;
 bottom: 1.8rem;
 color: #fff;
 font-size: 1.1rem;
 font-weight: 500;
 letter-spacing: 1px;
 text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
 pointer-events: none;
}

.vehicle-showcase-info {
 padding: 2.5rem;
 text-align: center;
}

.vehicle-showcase-info h3 {
 margin-bottom: 0.5rem;
 color: var(--primary-color);
 font-size: 1.8rem;
 font-weight: 400;
 letter-spacing: 2px;
}

.vehicle-showcase-type {
 color: var(--accent-color);
 font-size: 0.85rem;
 font-weight: 300;
 letter-spacing: 4px;
 margin-bottom: 1.2rem;
 display: block;
 text-transform: uppercase;
}

.vehicle-showcase-desc {
 color: var(--text-muted);
 margin-bottom: 1.8rem;
 font-size: 0.95rem;
 font-weight: 300;
 line-height: 1.8;
}

.vehicle-showcase-specs {
 display: flex;
 gap: 3rem;
 padding-top: 1.5rem;
 border-top: 1px solid rgba(0, 0, 0, 0.08);
 justify-content: center;
}

.vehicle-showcase-specs span {
 color: var(--text-muted);
 font-size: 0.9rem;
 letter-spacing: 1px;
}

.vehicle-showcase-specs i {
 color: var(--accent-color);
 margin-right: 0.5rem;
}

/* Prime Way APP 展示 */
.app-showcase {
 background: var(--white);
}

.app-showcase-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 2rem;
 align-items: stretch;
}

.app-showcase-item {
 overflow: hidden;
 border-radius: 12px;
 background: var(--white);
 box-shadow: var(--shadow);
 transition: all 0.4s ease;
}

.app-showcase-item:hover {
 box-shadow: var(--shadow-lg);
 transform: translateY(-4px);
}

.app-showcase-item img {
 width: 100%;
 height: auto;
 display: block;
 object-fit: contain;
 vertical-align: top;
}

/* 机场专线 */
.airport-line {
 background: var(--bg-light);
}

.airport-line-content,
.intercity-line-content {
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 5rem;
 align-items: center;
}

.airport-line-list,
.intercity-line-list {
 margin-top: 3rem;
}

.airport-line-item,
.intercity-line-item {
 display: flex;
 gap: 2rem;
 margin-bottom: 2.5rem;
 align-items: center;
}

.airport-line-icon,
.intercity-line-icon {
 width: 70px;
 height: 70px;
 display: flex;
 align-items: center;
 justify-content: center;
 flex-shrink: 0;
 overflow: hidden;
}

.airport-line-icon img,
.intercity-line-icon img {
 width: 70px;
 height: 70px;
 object-fit: contain;
 display: block;
}

.airport-line-icon i,
.intercity-line-icon i {
 font-size: 1.5rem;
 color: var(--primary-color);
}

.airport-line-details h4,
.intercity-line-details h4 {
 margin-bottom: 0.6rem;
 color: var(--primary-color);
 font-size: 1.3rem;
 font-weight: 400;
 letter-spacing: 1px;
}

.airport-line-details p,
.intercity-line-details p {
 color: var(--text-muted);
 font-weight: 300;
 line-height: 1.8;
}

.airport-line-image img,
.intercity-line-image img {
 width: 100%;
 border-radius: 0;
 box-shadow: var(--shadow-lg);
}

/* 城际专线 */
.intercity-line {
 background: #ffffff;
}

.intercity-line .intercity-line-content .intercity-line-text {
 order: 2;
}

.intercity-line .intercity-line-content .intercity-line-image {
 order: 1;
}

/* 品牌故事 */
.brand-story {
 background: var(--primary-color);
 color: var(--white);
 text-align: center;
 position: relative;
}

.brand-story::before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 right: 0;
 bottom: 0;
 background: linear-gradient(135deg, rgba(26, 26, 46, 0.95) 0%, rgba(22, 33, 62, 0.92) 100%);
}

.brand-story .container {
 position: relative;
 z-index: 1;
 padding-left: 20px;
 padding-right: 20px;
}

.brand-story-text {
 max-width: 800px;
 margin: 0 auto 4rem;
}

.brand-story-text p {
 color: rgba(255, 255, 255, 0.75);
 line-height: 2;
 margin-bottom: 1.8rem;
 font-size: 1.05rem;
 font-weight: 300;
}

.brand-story .section-title {
 color: var(--white);
}

.brand-story .section-subtitle {
 color: rgba(255, 255, 255, 0.5);
}

.brand-story-cards {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 1.25rem;
 width: 100%;
}

.brand-story-card {
 padding: 2rem 1rem;
 background: rgba(255, 255, 255, 0.05);
 backdrop-filter: blur(10px);
 border: 1px solid rgba(255, 255, 255, 0.1);
 min-width: 0;
}

/* 上方：说明文案，金色/强调样式，稍大，尽量一行 */
.brand-story-card-label {
 display: block;
 font-family: 'Didot', 'Bodoni MT', serif;
 font-size: 1.28rem;
 font-weight: 400;
 color: var(--accent-color);
 margin-bottom: 0.5rem;
 line-height: 1.4;
 letter-spacing: 1px;
 white-space: nowrap;
}

/* 下方：市场痛点编号，白色弱化样式，稍小 */
.brand-story-card-number {
 color: rgba(255, 255, 255, 0.7);
 font-size: 0.95rem;
 letter-spacing: 1px;
 font-weight: 300;
 line-height: 1.4;
}

/* 合作共赢 */
.cooperation {
 background: var(--bg-light);
 padding-bottom: 0;
}

.cooperation .container::after {
 content: '';
 display: block;
 height: 1px;
 background: linear-gradient(90deg, transparent, rgba(201, 169, 97, 0.15), rgba(212, 184, 109, 0.3), rgba(201, 169, 97, 0.15), transparent);
}

.cooperation-content {
 display: grid;
 grid-template-columns: 1fr 1.3fr;
 gap: 4rem;
}

.cooperation-list {
 display: flex;
 flex-direction: column;
 gap: 2.5rem;
}

.cooperation-item {
 display: flex;
 align-items: center;
 gap: 2rem;
}

.cooperation-item i {
 width: 70px;
 height: 70px;
 background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
 color: var(--accent-color);
 border-radius: 50%;
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 1.5rem;
}

.cooperation-icon-wrap {
 width: 70px;
 height: 70px;
 min-width: 70px;
 min-height: 70px;
 background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
 border-radius: 50%;
 display: flex;
 align-items: center;
 justify-content: center;
}

.cooperation-item-icon {
 width: 2.2rem;
 height: 2.2rem;
 object-fit: contain;
}

.cooperation-item h4 {
 margin-bottom: 0.4rem;
 color: var(--primary-color);
 font-size: 1.1rem;
 letter-spacing: 1px;
}

.cooperation-item p {
 color: var(--text-muted);
 font-size: 1rem;
 font-weight: 300;
}

.cooperation-item p a {
 color: var(--text-muted);
 text-decoration: none;
}

.cooperation-item p a:hover {
 color: var(--accent-color);
}

.cooperation-desc {
 color: var(--accent-color);
 font-size: 2rem;
 font-weight: 300;
 letter-spacing: 2px;
 display: block;
}

.cooperation-image-wrap {
 padding: 0;
 box-shadow: none;
 overflow: hidden;
 background: transparent;
}

.cooperation-image-wrap .cooperation-image {
 width: 100%;
 height: auto;
 display: block;
 vertical-align: top;
}

/* 合作品牌 logo 区 */
.partner-brands {
 padding: 4rem 0;
 background: var(--bg-light);
}

.partner-brands-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 2rem;
 align-items: center;
 justify-items: center;
}

.partner-brands-grid img {
 max-width: 100%;
 height: auto;
 max-height: 80px;
 object-fit: contain;
 display: block;
}

.cooperation-image-wrap h3 {
 margin-bottom: 2.5rem;
 color: var(--primary-color);
 font-size: 1.8rem;
 font-weight: 300;
 letter-spacing: 2px;
 text-align: center;
}

.form-row {
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 1.5rem;
 margin-bottom: 1.5rem;
}

.form-group {
 margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
 width: 100%;
 padding: 16px 20px;
 border: 1px solid rgba(0, 0, 0, 0.1);
 border-radius: 0;
 font-size: 0.95rem;
 transition: all 0.3s ease;
 font-family: inherit;
 background: var(--bg-light);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
 outline: none;
 border-color: var(--accent-color);
 background: var(--white);
}

.form-group textarea {
 resize: vertical;
}

.form-group select {
 cursor: pointer;
 background: var(--bg-light);
}

/* 页脚 */
.footer {
 background: var(--primary-color);
 color: var(--white);
 padding: 5rem 0 2rem;
}

.footer-top {
 display: grid;
 grid-template-columns: 1fr 1fr 1fr;
 gap: 4rem;
 margin-bottom: 4rem;
 align-items: start;
}

.footer-serve {
 text-align: center;
}

.footer-serve-inner {
 max-width: 260px;
 margin: 0 auto;
 padding-top: 0.5rem;
 border-top: 1px solid var(--accent-color);
}

.footer-serve-logo {
 width: 100%;
 height: auto;
 display: block;
 margin-bottom: 1.25rem;
 object-fit: contain;
}

.footer-serve-title {
 color: var(--white);
 font-size: 1.5rem;
 font-weight: 500;
 letter-spacing: 4px;
 margin-bottom: 0.75rem;
}

.footer-serve-divider {
 width: 60px;
 height: 2px;
 background: var(--accent-color);
 margin: 0 auto;
}

.footer-section h4 {
 margin-bottom: 2rem;
 color: var(--accent-color);
 font-size: 0.95rem;
 letter-spacing: 2px;
 font-weight: 400;
}

.footer-section .logo {
 margin-bottom: 2rem;
}

.footer-section .logo-en {
 color: var(--white);
}

.footer-section .logo-cn {
 color: var(--accent-color);
}

.footer-section p {
 color: rgba(255, 255, 255, 0.6);
 line-height: 2;
 font-weight: 300;
}

.footer-section ul {
 list-style: none;
}

.footer-section ul li {
 margin-bottom: 1.2rem;
}

.footer-section ul li i {
 color: var(--accent-color);
 margin-right: 0.8rem;
}

.footer-section ul li .footer-contact-icon {
 width: 1rem;
 height: 1rem;
 object-fit: contain;
 vertical-align: middle;
 margin-right: 0.8rem;
}

.footer-qrcode-section {
 display: flex;
 align-items: flex-start;
}

.footer-qrcode {
 width: 110px;
 height: auto;
 display: block;
 object-fit: contain;
}

.footer-section ul a {
 color: rgba(255, 255, 255, 0.6);
 text-decoration: none;
 transition: color 0.3s ease;
 font-size: 0.9rem;
}

.footer-section ul a:hover {
 color: var(--accent-color);
}

.footer-bottom {
 text-align: center;
 padding-top: 3rem;
 border-top: 1px solid rgba(255, 255, 255, 0.1);
 color: rgba(255, 255, 255, 0.4);
 font-size: 0.85rem;
 letter-spacing: 1px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
 .audience-grid {
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  }

 .core-advantages-grid {
  grid-template-columns: 1fr;
 }

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

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

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

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

 .airport-line-content,
 .intercity-line-content {
  grid-template-columns: 1fr;
  gap: 3rem;
  }

  .cooperation-content {
  grid-template-columns: 1fr;
  }

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

  .footer-top {
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  }
}

@media (max-width: 768px) {
 .mobile-menu-btn {
  display: block;
 }

 .nav-links {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--white);
  flex-direction: column;
  padding: 3rem 2rem;
  box-shadow: var(--shadow-lg);
 }

 .nav-links.active {
  display: flex;
 }

 .hero-title {
  font-size: 3.5rem;
  letter-spacing: 4px;
  white-space: normal;
  }

 .hero-subtitle {
  font-size: 0.85rem;
 }

 .hero-desc {
  font-size: 1rem;
 }

 .hero-stats {
  grid-template-columns: 1fr;
  gap: 2rem;
 }

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

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

 .app-showcase-grid {
  grid-template-columns: 1fr;
  }

 .vehicle-showcase-grid {
  grid-template-columns: 1fr;
  }

  .partner-brands-grid {
  grid-template-columns: 1fr;
  }

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

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

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

 section {
  padding: 80px 0;
 }

 .cooperation-image-wrap {
  padding: 2.5rem;
  }
}

@media (max-width: 480px) {
 .hero-title {
  font-size: 2.5rem;
  letter-spacing: 2px;
  white-space: normal;
  }

 .hero-buttons {
  flex-direction: column;
  align-items: center;
 }

 .brand-story-cards {
  grid-template-columns: 1fr;
 }

 .hero-stats {
  grid-template-columns: 1fr;
 }

 .section-title {
  font-size: 2.5rem;
 }
}

/* 平滑滚动 */
html {
 scroll-behavior: smooth;
}

/* 加载动画 */
@keyframes fadeInUp {
 from {
  opacity: 0;
  transform: translateY(40px);
 }
 to {
  opacity: 1;
  transform: translateY(0);
 }
}

.audience-item,
.core-advantages-card,
.product-matrix-card,
.vehicle-showcase-card,
.app-showcase-item,
.brand-story-card {
 animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 细节优化 */
::selection {
 background: var(--accent-color);
 color: var(--primary-color);
}

::-webkit-scrollbar {
 width: 8px;
}

::-webkit-scrollbar-track {
 background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
 background: var(--accent-color);
}

::-webkit-scrollbar-thumb:hover {
 background: var(--accent-light);
}