/* ===== 畅快运科技官网 - 组件样式 ===== */

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2) var(--spacing-5);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
  border-radius: var(--radius-base);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-in-out);
  white-space: nowrap;
  user-select: none;
  height: 40px;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--primary-500);
  color: var(--text-white);
  border-color: var(--primary-500);
}

.btn--primary:hover {
  background: var(--primary-400);
  border-color: var(--primary-400);
  box-shadow: 0 4px 12px rgba(24, 144, 255, 0.35);
}

.btn--secondary {
  background: transparent;
  color: var(--primary-500);
  border-color: var(--primary-500);
}

.btn--secondary:hover {
  color: var(--primary-400);
  border-color: var(--primary-400);
  background: var(--primary-50);
}

.btn--ghost {
  background: transparent;
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-white);
}

.btn--lg {
  height: 48px;
  padding: var(--spacing-3) var(--spacing-8);
  font-size: var(--font-size-md);
}

.btn--sm {
  height: 32px;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-sm);
}

/* ===== 头部导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: #e3e9f5;
  z-index: var(--z-fixed);
  transition: all var(--duration-base) var(--ease-in-out);
}

.header--scrolled {
  height: var(--header-height-scrolled);
  box-shadow: var(--shadow-base);
}

.header__container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.header__logo-img {
  height: 40px;
  width: auto;
}

.header--scrolled .header__logo-img {
  height: 36px;
}

.header__logo-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.header__nav-item {
  position: relative;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  padding: var(--spacing-2) 0;
  transition: color var(--duration-base);
}

.header__nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary-500);
  transition: width var(--duration-base) var(--ease-out);
}

.header__nav-item:hover,
.header__nav-item--active {
  color: var(--primary-500);
}

.header__nav-item--active::after,
.header__nav-item:hover::after {
  width: 100%;
}

/* 移动端菜单按钮 */
.header__mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.hamburger {
  position: relative;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: background var(--duration-base);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--duration-base);
}

.hamburger::before {
  top: -7px;
}

.hamburger::after {
  bottom: -7px;
}

.header__mobile-toggle--active .hamburger {
  background: transparent;
}

.header__mobile-toggle--active .hamburger::before {
  transform: translateY(7px) rotate(45deg);
}

.header__mobile-toggle--active .hamburger::after {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1024px) {
  .header__nav {
    display: none;
  }

  .header__mobile-toggle {
    display: flex;
  }
}

/* 移动端导航 */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  right: -100%;
  width: 280px;
  height: calc(100vh - var(--header-height));
  background: var(--bg-white);
  padding: var(--spacing-6);
  z-index: var(--z-modal);
  transition: right var(--duration-base) var(--ease-out);
  overflow-y: auto;
}

.mobile-nav--open {
  right: 0;
}

.mobile-nav__item {
  display: block;
  padding: var(--spacing-4) 0;
  font-size: var(--font-size-md);
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-light);
}

.mobile-nav__item--active {
  color: var(--primary-500);
}

.mobile-nav__overlay {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  z-index: var(--z-modal-backdrop);
  transition: opacity var(--duration-base);
}

.mobile-nav__overlay--visible {
  opacity: 1;
  visibility: visible;
}

/* ===== Banner轮播 ===== */
.banner {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  max-height: 900px;
  overflow: hidden;
  margin-top: var(--header-height);
}

.banner__slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner__slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.8s ease-in-out;
}

.banner__slide--active {
  opacity: 1;
}

.banner__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.3) 100%);
}

.banner__content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--text-white);
  z-index: 1;
}

.banner__title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-4);
  max-width: 900px;
  white-space: nowrap;
}

.banner__subtitle {
  font-size: var(--font-size-xl);
  opacity: 0.9;
  margin-bottom: var(--spacing-8);
  max-width: 600px;
}

.banner__btn {
  width: fit-content;
}

.banner__indicators {
  position: absolute;
  bottom: var(--spacing-10);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-3);
  z-index: 2;
}

.banner__indicator {
  width: 40px;
  height: 4px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  transition: all var(--duration-base);
}

.banner__indicator:hover {
  background: rgba(255, 255, 255, 0.6);
}

.banner__indicator--active {
  background: var(--text-white);
  width: 60px;
}

.banner__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-full);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-base);
  z-index: 2;
}

.banner__arrow:hover {
  background: rgba(0, 0, 0, 0.5);
}

.banner__arrow--prev {
  left: var(--spacing-6);
}

.banner__arrow--next {
  right: var(--spacing-6);
}

@media (max-width: 768px) {
  .banner {
    height: 70vh;
    min-height: 400px;
    margin-top: var(--header-height);
  }

  .banner__title {
    font-size: var(--font-size-3xl);
    white-space: normal;
  }

  .banner__subtitle {
    font-size: var(--font-size-md);
  }

  .banner__arrow {
    width: 36px;
    height: 36px;
  }

  .banner__arrow--prev {
    left: var(--spacing-3);
  }

  .banner__arrow--next {
    right: var(--spacing-3);
  }
}

/* ===== 区块标题 ===== */
.section-title {
  margin-bottom: var(--spacing-12);
}

.section-title--center {
  text-align: center;
}

.section-title__main {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  position: relative;
  display: inline-block;
}

.section-title--center .section-title__main::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500) 0%, var(--ai-purple) 100%);
  border-radius: 2px;
}

.section-title__sub {
  font-size: var(--font-size-md);
  color: var(--text-secondary);
  margin-top: var(--spacing-6);
  max-width: 600px;
}

.section-title--center .section-title__sub {
  margin-left: auto;
  margin-right: auto;
}

.section--dark .section-title__main,
.section--primary .section-title__main {
  color: var(--text-white);
}

.section--dark .section-title__sub,
.section--primary .section-title__sub {
  color: var(--text-white-secondary);
}

/* ===== 场景卡片 ===== */
.scenario-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--ease-out);
  height: 100%;
}

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

.scenario-card__icon {
  width: 180px;
  height: 120px;
  margin: 0 auto var(--spacing-5);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border-radius: 0;
}

.scenario-card__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.scenario-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.scenario-card__desc {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ===== 优势卡片 ===== */
.advantage-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-8);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--ease-out);
  height: 100%;
}

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

.advantage-card__icon {
  font-size: 48px;
  margin-bottom: var(--spacing-5);
}

.advantage-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.advantage-card__desc {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ===== AI智能体卡片 ===== */
.agent-card {
  background: linear-gradient(135deg, var(--ai-purple-light) 0%, var(--bg-white) 100%);
  border: 1px solid var(--ai-purple);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.agent-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, var(--ai-purple) 0%, transparent 70%);
  opacity: 0.1;
}

.agent-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(102, 126, 234, 0.25);
}

.agent-card__icon {
  font-size: 36px;
  margin-bottom: var(--spacing-4);
}

.agent-card__name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.agent-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-4);
}

.agent-card__status {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--success);
}

.agent-card__dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: var(--radius-full);
  animation: pulse 2s infinite;
}

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

.agent-card__demo {
  margin-top: var(--spacing-4);
  width: 100%;
}

/* ===== 合作伙伴Logo ===== */
.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  transition: all var(--duration-base);
}

.partner-logo:hover {
  transform: scale(1.05);
}

.partner-logo img {
  max-height: 60px;
  max-width: 100%;
  object-fit: contain;
  filter: grayscale(0%);
  opacity: 1;
  transition: all var(--duration-base);
}

.partner-logo:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* ===== 平台卡片 ===== */
.platform-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-base) var(--ease-out);
  border: 2px solid transparent;
}

.platform-card:hover {
  border-color: var(--primary-500);
  box-shadow: var(--shadow-md);
}

.platform-card__key {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--spacing-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
  color: var(--text-white);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-lg);
}

.platform-card__name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.platform-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* ===== 页面Hero ===== */
.page-hero {
  position: relative;
  height: 400px;
  margin-top: var(--header-height);
  background: linear-gradient(135deg, var(--navy-800) 0%, var(--navy-900) 100%);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 21, 41, 0.7);
}

.page-hero__content {
  position: relative;
  text-align: center;
  color: var(--text-white);
  z-index: 1;
}

.page-hero__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-4);
}

.page-hero__subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .page-hero {
    height: 300px;
  }

  .page-hero__title {
    font-size: var(--font-size-2xl);
  }
}

/* ===== 页脚 ===== */
.footer {
  background: var(--navy-900);
  color: var(--text-white-secondary);
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-10);
  padding-bottom: var(--spacing-10);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo {
  height: 48px;
  margin-bottom: var(--spacing-4);
}

.footer__slogan {
  font-size: var(--font-size-md);
  color: var(--text-white);
  margin-bottom: var(--spacing-2);
}

.footer__desc {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.footer__column-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--text-white);
  margin-bottom: var(--spacing-5);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.footer__link {
  color: var(--text-white-secondary);
  font-size: var(--font-size-sm);
  transition: color var(--duration-base);
}

.footer__link:hover {
  color: var(--primary-400);
}

.footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  font-size: var(--font-size-sm);
}

.footer__contact-icon {
  font-size: var(--font-size-md);
}

.footer__qrcode {
  margin-top: var(--spacing-4);
  text-align: right;
}

.footer__qrcode-img {
  width: 100px;
  height: 100px;
  border-radius: 4px;
}

.footer__bottom {
  padding-top: var(--spacing-6);
  text-align: center;
}

.footer__copyright {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.45);
}

@media (max-width: 1024px) {
  .footer__main {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
  }
}

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

  .footer {
    padding: var(--spacing-10) 0 var(--spacing-6);
  }
}