/* ==========================================================================
   南国数创 — Corporate Site Styles
   BEM naming: ng-{block}__{element}--{modifier}
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Zhi+Mang+Xing&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Noto Sans SC', 'Source Han Sans SC', sans-serif;
  background-color: #FFFCEC;
  color: #000000;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: #3139FB;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #2702C2;
}

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

/* --- Utility --- */
.ng-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.ng-section {
  padding: 100px 0;
}

.ng-section--alt {
  background-color: #FFFEF6;
}

/* --- Header / Nav --- */
.ng-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(255, 252, 236, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #E8E4D4;
  transition: box-shadow 0.3s;
}

.ng-header--scrolled {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.ng-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.ng-header__brand {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: 28px;
  color: #3139FB;
  letter-spacing: 2px;
}

.ng-header__nav {
  display: flex;
  gap: 32px;
  list-style: none;
}

.ng-header__link {
  font-size: 15px;
  color: #696969;
  transition: color 0.2s;
  font-weight: 400;
}

.ng-header__link:hover,
.ng-header__link--active {
  color: #3139FB;
}

.ng-header__menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.ng-header__menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: #000;
  margin: 5px 0;
  transition: 0.3s;
}

/* --- Hero --- */
.ng-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
}

.ng-hero__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
}

.ng-hero__eyebrow {
  font-size: 14px;
  color: #999999;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.ng-hero__title {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1.15;
  color: #3139FB;
  margin-bottom: 32px;
}

.ng-hero__desc {
  font-size: 20px;
  color: #696969;
  max-width: 560px;
  line-height: 1.9;
  font-weight: 300;
}

.ng-hero__scroll {
  margin-top: 60px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #999;
  letter-spacing: 2px;
}

.ng-hero__scroll-line {
  width: 48px;
  height: 1px;
  background: #E8E4D4;
}

/* --- Story --- */
.ng-story__label {
  font-size: 13px;
  color: #999;
  letter-spacing: 4px;
  margin-bottom: 20px;
}

.ng-story__heading {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: clamp(36px, 5vw, 56px);
  color: #3139FB;
  margin-bottom: 40px;
  line-height: 1.3;
}

.ng-story__body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.ng-story__text {
  font-size: 17px;
  color: #696969;
  line-height: 2;
}

.ng-story__text p + p {
  margin-top: 20px;
}

.ng-story__image {
  border: 1px solid #E8E4D4;
  border-radius: 0;
  overflow: hidden;
}

/* --- Business --- */
.ng-biz__heading {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: clamp(36px, 5vw, 56px);
  color: #3139FB;
  margin-bottom: 16px;
  text-align: center;
}

.ng-biz__subtitle {
  text-align: center;
  color: #999;
  font-size: 16px;
  margin-bottom: 72px;
}

.ng-biz__list {
  display: flex;
  flex-direction: column;
  gap: 64px;
}

.ng-biz__item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  align-items: start;
}

.ng-biz__num {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: 64px;
  color: #3139FB;
  line-height: 1;
  opacity: 0.35;
}

.ng-biz__item-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #000;
}

.ng-biz__item-desc {
  font-size: 17px;
  color: #696969;
  line-height: 1.9;
  max-width: 640px;
}

/* --- Impact --- */
.ng-impact__heading {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: clamp(36px, 5vw, 56px);
  color: #3139FB;
  margin-bottom: 16px;
}

.ng-impact__subtitle {
  color: #696969;
  font-size: 17px;
  margin-bottom: 64px;
  max-width: 500px;
}

.ng-impact__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.ng-impact__card {
  background: #FFFEF6;
  border: 1px solid #E8E4D4;
  padding: 48px 32px;
  text-align: center;
}

.ng-impact__number {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: 56px;
  color: #3139FB;
  line-height: 1.1;
  margin-bottom: 8px;
}

.ng-impact__unit {
  font-size: 18px;
  color: #3139FB;
}

.ng-impact__desc {
  font-size: 15px;
  color: #696969;
  margin-top: 12px;
}

/* --- Contact --- */
.ng-contact__heading {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: clamp(36px, 5vw, 56px);
  color: #3139FB;
  margin-bottom: 40px;
}

.ng-contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.ng-contact__info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.ng-contact__row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.ng-contact__label {
  font-size: 14px;
  color: #999;
  min-width: 56px;
}

.ng-contact__value {
  font-size: 16px;
  color: #000;
}

.ng-contact__map {
  border: 1px solid #E8E4D4;
  overflow: hidden;
}
.ng-city-card {
  background: #F6F2EB;
  padding: 48px 24px;
  text-align: center;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.ng-city-card__label {
  font-size: 12px;
  color: #999;
  letter-spacing: 1px;
}
.ng-city-card__name {
  font-size: 44px;
  font-weight: 700;
  color: #333;
}
.ng-city-card__en {
  font-size: 13px;
  color: #aaa;
  letter-spacing: 2px;
}

/* --- Footer --- */
.ng-footer {
  background: #000;
  color: #999;
  padding: 48px 0;
}

.ng-footer__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.ng-footer__brand {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: 24px;
  color: #FFFCEC;
}

.ng-footer__copy {
  font-size: 13px;
  color: #666;
}

.ng-footer__links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.ng-footer__links a {
  font-size: 13px;
  color: #999;
}

.ng-footer__links a:hover {
  color: #FFFCEC;
}

/* --- Legal pages --- */
.ng-legal {
  padding-top: 120px;
  padding-bottom: 80px;
}

.ng-legal__title {
  font-family: 'Zhi Mang Xing', cursive;
  font-size: 42px;
  color: #3139FB;
  margin-bottom: 12px;
}

.ng-legal__updated {
  font-size: 14px;
  color: #999;
  margin-bottom: 48px;
}

.ng-legal__body h2 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 16px;
  color: #000;
}

.ng-legal__body h3 {
  font-size: 17px;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 12px;
  color: #000;
}

.ng-legal__body p {
  font-size: 16px;
  color: #696969;
  margin-bottom: 12px;
  line-height: 1.9;
}

.ng-legal__body ul {
  padding-left: 24px;
  margin-bottom: 12px;
}

.ng-legal__body li {
  font-size: 16px;
  color: #696969;
  line-height: 1.9;
  margin-bottom: 6px;
}

/* --- Scroll reveal --- */
.ng-reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
  .ng-header__nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255, 252, 236, 0.98);
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid #E8E4D4;
  }

  .ng-header__nav--open {
    display: flex;
  }

  .ng-header__menu-btn {
    display: block;
  }

  .ng-hero__inner {
    padding: 60px 24px;
  }

  .ng-story__body {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .ng-biz__item {
    grid-template-columns: 48px 1fr;
    gap: 20px;
  }

  .ng-biz__num {
    font-size: 40px;
  }

  .ng-impact__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .ng-contact__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .ng-footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .ng-section {
    padding: 64px 0;
  }
}