/* ==========================================================================
   门户站点样式 —— 复刻 zaai.world 首页结构与视觉
   ========================================================================== */

/* ------------------------------ 导航栏 ---------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(5, 5, 8, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.navbar__inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1rem;
}
@media (min-width: 640px) { .navbar__inner { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .navbar__inner { padding: 0 2rem; } }

.navbar__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4rem;
}

/* 8 个中文导航项 + 登录按钮在 1024px 以下挤不下（实测 768px 会把品牌名压成竖排、
   按钮挤出右边界），因此桌面导航从 1024px 才展开，之前一律走汉堡菜单 */
.navbar__links {
  display: none;
  align-items: center;
  gap: 0.25rem;
}
@media (min-width: 1024px) { .navbar__links { display: flex; } }

.nav-link {
  position: relative;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: #94a3b8;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-link:hover,
.nav-link.active { color: #fff; }
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 1px;
}

/* 站外链接：带外链小箭头 */
.nav-link--ext { display: inline-flex; align-items: center; gap: 0.25rem; }
.nav-link__ext {
  width: 0.75rem;
  height: 0.75rem;
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity 0.2s;
}
.nav-link--ext:hover .nav-link__ext,
.nav-link--ext.active .nav-link__ext { opacity: 1; }

/* 1024–1279px 宽度仍偏紧，收紧间距与字号给登录按钮留余量 */
@media (min-width: 1024px) and (max-width: 1279px) {
  .navbar__links { gap: 0; }
  .nav-link { padding: 0.5rem 0.5rem; font-size: 0.8125rem; }
  .nav-link.active::after { left: 0.5rem; right: 0.5rem; }
  .navbar__actions .btn { padding-left: 0.75rem; padding-right: 0.75rem; }
}

.navbar__actions { display: none; align-items: center; gap: 0.75rem; flex-shrink: 0; }
@media (min-width: 1024px) { .navbar__actions { display: flex; } }

.navbar__toggle {
  padding: 0.5rem;
  color: #94a3b8;
  transition: color 0.2s;
  display: block;
}
.navbar__toggle:hover { color: #fff; }
@media (min-width: 1024px) { .navbar__toggle { display: none; } }

.navbar__mobile {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(10, 14, 26, 0.97);
  backdrop-filter: blur(20px);
  /* 导航栏是 fixed，菜单高度超过视口时无法靠页面滚动看到底部，
     因此菜单自身可滚动（登录后展开个人资料卡时尤其需要） */
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.navbar__mobile-inner { padding: 1rem; display: flex; flex-direction: column; gap: 0.5rem; }
.navbar__mobile-link {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: #cbd5e1;
  transition: all 0.2s;
}
.navbar__mobile-link:hover { background: rgba(255, 255, 255, 0.04); color: #fff; }
.navbar__mobile-link .nav-link__ext { width: 0.8125rem; height: 0.8125rem; }
.navbar__mobile-cta { padding-top: 1rem; }

/* -------------------------------- 首屏 ---------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-h);
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 5, 8, 0.8) 0%, rgba(5, 5, 8, 0.6) 45%, #050508 100%);
}
.hero__dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.4;
}
.hero__glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.1) 40%, transparent 70%);
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}

/* 参考站 hero 为紧凑横幅（约 388px），仅标题 + 副标题 */
.hero__inner {
  position: relative;
  max-width: 80rem;
  margin: 0 auto;
  padding: 3rem 1rem 3.5rem;
  text-align: center;
}
@media (min-width: 640px) {
  .hero__inner { padding: 4rem 1.5rem 4.5rem; }
}
@media (min-width: 1024px) {
  .hero__inner { padding: 5rem 2rem 4.5rem; }
}

.hero__content { max-width: 56rem; margin: 0 auto; }

.hero__title {
  font-size: 1.875rem;
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}
@media (min-width: 640px) { .hero__title { font-size: 3.75rem; } }
@media (min-width: 1024px) { .hero__title { font-size: 6rem; white-space: nowrap; } }

.hero__title .gradient-text {
  filter: drop-shadow(0 0 80px rgba(139, 92, 246, 0.6));
}

.hero__subtitle {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: #94a3b8;
  max-width: 40rem;
  margin: 0 auto;
}
@media (min-width: 640px) { .hero__subtitle { font-size: 1.25rem; } }

/* ------------------------------ 区块容器 -------------------------------- */
.sec { position: relative; padding: 4rem 0; }
@media (min-width: 640px) { .sec { padding: 6rem 0; } }
.sec__inner { position: relative; max-width: 80rem; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .sec__inner { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .sec__inner { padding: 0 2rem; } }

.sec__head { text-align: center; margin-bottom: 3.5rem; }
.sec__head--tight { margin-bottom: 2.5rem; }
.sec__head--mt { margin-top: 4rem; }
.sec__head .section-subtitle { margin: 0 auto; }

.sec--partners { position: relative; overflow: hidden; }
.sec__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(30, 58, 138, 0.14) 50%, transparent 100%);
  pointer-events: none;
}

/* ---------------------------- 五大服务卡片 ------------------------------ */
.plaza-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 64rem;
  margin: 0 auto;
}
@media (min-width: 768px) { .plaza-grid { grid-template-columns: repeat(6, 1fr); } }

.plaza-card {
  display: block;
  border-radius: var(--radius);
  padding: 1.5rem;
  grid-column: span 1;
}
@media (min-width: 768px) {
  .plaza-card--wide { grid-column: span 3; }
  .plaza-card--narrow { grid-column: span 2; }
}

.plaza-card__icon { font-size: 1.875rem; line-height: 1; margin-bottom: 1rem; display: block; }
.plaza-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 0.5rem;
}
.plaza-card__desc { font-size: 0.875rem; line-height: 1.7; color: #94a3b8; }

/* 站内卡片改走外链时，标题右侧标一个外链箭头，避免用户以为还在本站 */
.plaza-card__title--ext {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.plaza-card__title-ext {
  width: 0.8125rem;
  height: 0.8125rem;
  flex-shrink: 0;
  color: #a78bfa;
  opacity: 0.7;
  transition: opacity 0.2s;
}
.plaza-card:hover .plaza-card__title-ext { opacity: 1; }

/* -------- 站外入口卡（AI智能办公）：横贯通栏，与站内卡片作视觉区分 -------- */
.plaza-card--ext {
  grid-column: span 1;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  border: 1px solid rgba(139, 92, 246, 0.32);
  background:
    linear-gradient(90deg, rgba(37, 99, 235, 0.14), rgba(147, 51, 234, 0.14)),
    var(--bg-card);
}
@media (min-width: 768px) { .plaza-card--ext { grid-column: span 6; } }

.plaza-card__icon--lead {
  margin-bottom: 0;
  font-size: 2rem;
  flex-shrink: 0;
}
.plaza-card__body { flex: 1 1 auto; min-width: 0; }
.plaza-card--ext .plaza-card__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.25rem;
}
.plaza-card__badge {
  font-size: 0.6875rem;
  font-weight: 500;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  border-radius: 9999px;
  color: #c4b5fd;
  background: rgba(139, 92, 246, 0.16);
  border: 1px solid rgba(139, 92, 246, 0.3);
}
.plaza-card__arrow {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  color: #c4b5fd;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.28);
  transition: transform 0.2s, background 0.2s;
}
.plaza-card__arrow svg { width: 1.125rem; height: 1.125rem; }
.plaza-card--ext:hover .plaza-card__arrow {
  transform: translateX(3px);
  background: rgba(139, 92, 246, 0.22);
}
@media (max-width: 639px) {
  /* 窄屏不换行：图标 + 文字 + 箭头保持同一行，箭头不能掉到左下角 */
  .plaza-card--ext { gap: 0.875rem; }
  .plaza-card__icon--lead { font-size: 1.625rem; }
  .plaza-card--ext .plaza-card__desc { font-size: 0.8125rem; }
  .plaza-card__arrow { width: 2rem; height: 2rem; }
  .plaza-card__arrow svg { width: 1rem; height: 1rem; }
}

/* ---------------------------- 合作伙伴 logo ----------------------------- */
.logo-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* 参考站：白底卡片，logo 图最大高 3rem / 宽 10rem */
.logo-card {
  border-radius: var(--radius);
  height: 5rem;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s, box-shadow 0.2s;
}
.logo-card:hover { transform: translateY(-2px); box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.3); }
.logo-card img {
  max-height: 3rem;
  max-width: 10rem;
  width: auto;
  object-fit: contain;
}
.logo-card__text {
  font-size: 1.125rem;
  font-weight: 700;
  color: #334155;
  white-space: nowrap;
}

/* 窄屏：卡片宽度原本随 logo 内容浮动，两列并排时参差不齐，
   改为等宽两列栅格让边缘对齐 */
@media (max-width: 639px) {
  .logo-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }
  .logo-card { height: 4.5rem; padding: 0 0.75rem; }
  .logo-card img { max-height: 2.5rem; max-width: 100%; }
  .logo-card__text { font-size: 1rem; }
  /* 合作伙伴 8 个为偶数可整行排满；园区 3 个让末项居中占满整行 */
  .logo-row:last-of-type .logo-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    justify-self: center;
    min-width: calc(50% - 0.375rem);
  }
}

/* -------------------------------- 页脚 ---------------------------------- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
}
.footer__inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 4rem 1rem;
}
@media (min-width: 640px) { .footer__inner { padding: 4rem 1.5rem; } }
@media (min-width: 1024px) { .footer__inner { padding: 4rem 2rem; } }

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}
@media (min-width: 768px) { .footer__grid { grid-template-columns: repeat(3, 1fr); } }

.footer__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.8;
}
.footer__text {
  font-size: 0.875rem;
  line-height: 1.8;
  color: #94a3b8;
}

.footer__bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-faint);
}
@media (min-width: 640px) { .footer__bottom { flex-direction: row; } }
.footer__company { color: #334155; }

/* 占位页（广场页暂未开发） */
.placeholder {
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + 6rem);
  padding-bottom: 6rem;
  text-align: center;
}
.placeholder__title { font-size: 2rem; font-weight: 700; color: #fff; margin-bottom: 1rem; }
.placeholder__desc { color: var(--text-secondary); margin-bottom: 2rem; }