/* 设计令牌 — 源自 DESIGN.md §1.3，适配 Web */
:root {
  --color-primary: #f76743;
  --color-primary-light: #fff5eb;
  --color-button-primary: #212121;
  --color-bg-page: #f9fafe;
  --color-bg-card: #ffffff;
  --color-border: #f5f5f5;
  --color-divider: #ededed;
  --color-text-primary: #212121;
  --color-text-secondary: #666666;
  --color-text-muted: #999999;
  --color-link: #526892;
  --color-success: #00b96b;
  --radius-sm: 8px;
  --radius-card: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 4px 24px rgba(236, 241, 253, 0.8);
  --page-max-width: 1120px;
  --nav-height: 64px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --page-bg-gradient: linear-gradient(180deg, #f9fafe 0%, #f3f5fb 100%);
  --page-glow: radial-gradient(ellipse 80% 60% at 100% 0%, rgba(247, 103, 67, 0.08) 0%, transparent 70%);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-page);
  min-height: 100vh;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

.page-surface {
  position: relative;
  min-height: 100vh;
  background: var(--page-bg-gradient);
}

.page-surface__glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: var(--page-glow);
  z-index: 0;
}

.container {
  width: 100%;
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: var(--color-text-primary);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-text-primary);
}

.logo__img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a {
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

/* Hero */
.hero {
  position: relative;
  z-index: 1;
  padding: calc(var(--nav-height) + 64px) 0 80px;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero__title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero__title em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__desc {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  color: #fff;
  opacity: 0.92;
}

.btn--dark {
  background: var(--color-button-primary);
  color: #fff;
}

.btn--dark:hover {
  color: #fff;
  opacity: 0.92;
}

.btn--outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn--outline:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.hero__visual {
  position: relative;
}

.hero-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  padding: 24px;
}

.hero-card__label {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.hero-card__value {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
}

.hero-card__items {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.hero-card__item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.hero-card__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-success);
  flex-shrink: 0;
}

/* Section common */
.section {
  position: relative;
  z-index: 1;
  padding: 80px 0;
}

.section__header {
  text-align: center;
  margin-bottom: 48px;
}

.section__tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 12px;
}

.section__desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s, transform 0.2s;
}

.feature-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.feature-card__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* About */
.about-section {
  background: rgba(255, 255, 255, 0.6);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-intro {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.about-intro p + p {
  margin-top: 16px;
}

.info-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.info-card__header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-divider);
  font-size: 18px;
  font-weight: 600;
}

.info-card__body {
  padding: 8px 0;
}

.info-row {
  display: flex;
  padding: 16px 24px;
  gap: 16px;
  border-bottom: 1px solid var(--color-divider);
}

.info-row:last-child {
  border-bottom: none;
}

.info-row__label {
  flex-shrink: 0;
  width: 120px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.info-row__value {
  flex: 1;
  font-size: 15px;
  color: var(--color-text-primary);
  line-height: 1.5;
}

/* Contact */
.contact-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
}

.contact-grid .contact-card {
  flex: 1 1 240px;
  max-width: 300px;
}

.contact-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s;
}

.contact-card:hover {
  box-shadow: var(--shadow-card);
}

.contact-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.contact-card__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-card__value {
  font-size: 15px;
  color: var(--color-text-secondary);
}

.contact-card__value a {
  color: var(--color-text-primary);
  font-weight: 500;
}

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

/* 小程序浮动入口 */
.mini-float {
  position: fixed;
  right: 24px;
  bottom: 32px;
  z-index: 200;
}

.mini-float__btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border: none;
  border-radius: 999px;
  background: var(--color-button-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(33, 33, 33, 0.18);
  transition: transform 0.2s, box-shadow 0.2s;
}

.mini-float__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(33, 33, 33, 0.22);
}

.mini-float__icon {
  font-size: 18px;
  line-height: 1;
}

.mini-float__panel {
  position: absolute;
  right: 0;
  bottom: calc(100% + 12px);
  width: 196px;
  padding: 20px 16px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  text-align: center;
}

.mini-float__panel[hidden] {
  display: none;
}

.mini-float__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.mini-float__qrcode {
  width: 140px;
  height: 140px;
  margin: 0 auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-divider);
}

.mini-float__hint {
  margin-top: 10px;
  font-size: 12px;
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  position: relative;
  z-index: 1;
  padding: 32px 0;
  font-size: 12px;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-divider);
  background: var(--color-bg-card);
}

.site-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 20px;
}

.beian-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: inherit;
  text-decoration: none;
}

.beian-link:hover {
  color: var(--color-primary);
}

.beian-icon {
  height: 16px;
  width: auto;
}

.footer-divider {
  color: var(--color-divider);
}

.copyright {
  color: var(--color-text-muted);
}

/* Mobile nav */
@media (max-width: 900px) {
  .hero__content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__visual {
    display: none;
  }

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

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

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-divider);
    padding: 16px 0;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.25s;
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    display: block;
    padding: 12px 24px;
    width: 100%;
  }

  .site-header.is-menu-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header.is-menu-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header.is-menu-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .mini-float {
    right: 16px;
    bottom: 24px;
  }

  .mini-float__label {
    display: none;
  }

  .mini-float__btn {
    width: 52px;
    height: 52px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }
}