@charset "UTF-8";
/* ==========================================================================
   爱塔塔官网 · 前台专属样式 (PC 端现代化升级)
   说明：本文件仅作用于前台页面，不影响后台 CoreUI 的 style.css
   ========================================================================== */

:root {
  --at-primary: #0ea5e9;      /* 主色：天空蓝（云 · 科技） */
  --at-primary-2: #06b6d4;    /* 过渡色：青 */
  --at-primary-3: #14b8a6;    /* 过渡色：碧 */
  --at-accent: #ff7a45;       /* 强调色：珊瑚橙（海南热带） */
  --at-navy: #0b1b3b;         /* 深蓝黑：标题/深色区块 */
  --at-ink: #22334d;          /* 正文深灰蓝 */
  --at-muted: #64748b;        /* 次要文字 */
  --at-bg: #f5f9fc;           /* 页面浅色背景 */
  --at-card: #ffffff;
  --at-line: #e6eef5;
  --at-grad: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 52%, #14b8a6 100%);
  --at-grad-soft: linear-gradient(135deg, #e0f2fe 0%, #ccfbf1 100%);
  --at-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --at-shadow: 0 10px 30px rgba(15, 23, 42, 0.10);
  --at-shadow-lg: 0 24px 60px rgba(11, 27, 59, 0.18);
  --at-radius: 16px;
  --at-radius-lg: 24px;
  --at-nav-h: 72px;
}

/* ---------- 基础重置 ---------- */
.at-body {
  background: var(--at-bg);
  color: var(--at-ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.2px;
  overflow-x: hidden;
}
.at-body a { text-decoration: none; }

.at-container { max-width: 1180px; }
.at-section { padding: 88px 0; }
.at-section-tight { padding: 60px 0; }

/* 标题体系 */
.at-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--at-primary);
  text-transform: uppercase;
}
.at-eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--at-grad);
}
.at-h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--at-navy);
  letter-spacing: 0.5px;
  line-height: 1.25;
  margin: 14px 0 12px;
}
.at-h2 .grad { background: var(--at-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.at-lead { font-size: 16px; color: var(--at-muted); line-height: 1.8; max-width: 640px; }
.at-center { text-align: center; }
.at-center .at-lead { margin-left: auto; margin-right: auto; }

/* ---------- 顶部导航栏 ---------- */
.at-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--at-nav-h);
  z-index: 1030;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid rgba(11, 27, 59, 0.06);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.at-nav.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--at-shadow);
}
.at-nav-inner {
  display: flex;
  align-items: center;
  height: var(--at-nav-h);
}
.at-brand { display: flex; align-items: center; gap: 10px; }
.at-brand img { height: 44px; width: auto; display: block; }
.at-brand .at-brand-txt { display: flex; flex-direction: column; line-height: 1.1; }
.at-brand .at-brand-txt b { font-size: 18px; color: var(--at-navy); font-weight: 800; letter-spacing: 1px; }
.at-brand .at-brand-txt span { font-size: 11px; color: var(--at-muted); letter-spacing: 1.5px; }

.at-menu { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.at-menu a {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--at-ink);
  border-radius: 10px;
  transition: color 0.2s ease, background 0.2s ease;
}
.at-menu a:hover { color: var(--at-primary); background: rgba(14, 165, 233, 0.08); }
.at-menu a.active { color: var(--at-primary); }
.at-menu a.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 3px;
  border-radius: 3px;
  background: var(--at-grad);
}
.at-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 18px;
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: var(--at-grad);
  border-radius: 999px;
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.35);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.at-nav-cta:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 26px rgba(14, 165, 233, 0.45); }
.at-nav-cta .dot { width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: at-pulse 1.6s ease-out infinite; }

/* 移动端折叠按钮 */
.at-burger {
  display: none;
  margin-left: auto;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}
.at-burger-bar { width: 22px; height: 2px; border-radius: 2px; background: var(--at-navy); transition: transform 0.25s ease, opacity 0.25s ease; }

@keyframes at-pulse {
  0% { box-shadow: 0 0 0 0 rgba(255,255,255,0.6); }
  70% { box-shadow: 0 0 0 8px rgba(255,255,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
}

/* ---------- 通用按钮 ---------- */
.at-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.at-btn:hover { transform: translateY(-2px); }
.at-btn-primary { color: #fff; background: var(--at-grad); box-shadow: 0 10px 26px rgba(14, 165, 233, 0.4); }
.at-btn-primary:hover { box-shadow: 0 16px 34px rgba(14, 165, 233, 0.5); }
.at-btn-accent { color: #fff; background: linear-gradient(135deg, #ff7a45, #ff5f6d); box-shadow: 0 10px 26px rgba(255, 122, 69, 0.4); }
.at-btn-ghost { color: var(--at-navy); background: #fff; box-shadow: var(--at-shadow-sm); border: 1px solid var(--at-line); }
.at-btn-ghost:hover { color: var(--at-primary); box-shadow: var(--at-shadow); }
.at-btn-lg { padding: 17px 36px; font-size: 17px; }

/* ---------- Hero 区 ---------- */
.at-hero {
  position: relative;
  padding: calc(var(--at-nav-h) + 72px) 0 88px;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(14, 165, 233, 0.20), transparent 60%),
    radial-gradient(760px 460px at 92% 6%, rgba(20, 184, 166, 0.18), transparent 55%),
    linear-gradient(180deg, #f0f9ff 0%, #f5f9fc 100%);
  overflow: hidden;
}
.at-hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 120px;
  background: var(--at-bg);
  clip-path: ellipse(72% 100% at 50% 100%);
}
.at-hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; z-index: 2; }
.at-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--at-primary);
  background: #fff;
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 999px;
  box-shadow: var(--at-shadow-sm);
}
.at-hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--at-grad); }
.at-hero h1 {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.16;
  color: var(--at-navy);
  letter-spacing: 0.5px;
  margin: 22px 0 18px;
}
.at-hero h1 .grad { background: var(--at-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.at-hero-sub { font-size: 18px; color: var(--at-muted); line-height: 1.9; max-width: 520px; margin-bottom: 28px; }
.at-hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.at-hero-tags span {
  padding: 9px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--at-navy);
  background: #fff;
  border: 1px solid var(--at-line);
  border-radius: 999px;
  box-shadow: var(--at-shadow-sm);
}
.at-hero-tags span i { font-style: normal; color: var(--at-accent); margin-right: 4px; }
.at-hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.at-hero-note { margin-top: 26px; font-size: 13px; color: var(--at-muted); }
.at-hero-note b { color: var(--at-primary); }

/* Hero 右侧手机模型 */
.at-hero-visual { position: relative; display: flex; justify-content: center; }
.at-phone {
  position: relative;
  width: 290px;
  height: 590px;
  border-radius: 42px;
  background: #0b1b3b;
  padding: 12px;
  box-shadow: 0 40px 90px rgba(11, 27, 59, 0.35);
  transform: rotate(-3deg);
}
.at-phone::before {
  content: "";
  position: absolute;
  top: 12px; left: 50%;
  transform: translateX(-50%);
  width: 110px; height: 24px;
  background: #0b1b3b;
  border-radius: 0 0 16px 16px;
  z-index: 3;
}
.at-phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: 30px;
}
.at-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  z-index: -1;
}
.at-orb-1 { width: 240px; height: 240px; background: linear-gradient(135deg, rgba(14,165,233,0.35), rgba(20,184,166,0.3)); top: -40px; right: -40px; }
.at-orb-2 { width: 150px; height: 150px; background: linear-gradient(135deg, rgba(255,122,69,0.3), rgba(255,95,109,0.25)); bottom: 20px; left: -50px; }
.at-float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--at-shadow);
  font-size: 13px;
  font-weight: 600;
  color: var(--at-navy);
}
.at-float-card .ic { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-size: 17px; }
.at-fc-1 { top: 86px; left: -26px; animation: at-float 5s ease-in-out infinite; }
.at-fc-2 { bottom: 96px; right: -18px; animation: at-float 6s ease-in-out infinite 0.8s; }
@keyframes at-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ---------- 四大智慧支柱 ---------- */
.at-pillars { background: #fff; border-top: 1px solid var(--at-line); border-bottom: 1px solid var(--at-line); }
.at-pillars-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.at-pillar {
  position: relative;
  padding: 28px 24px;
  background: var(--at-bg);
  border: 1px solid var(--at-line);
  border-radius: var(--at-radius);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.at-pillar:hover { transform: translateY(-6px); background: #fff; box-shadow: var(--at-shadow); }
.at-pillar .ic {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; font-size: 24px;
  background: var(--at-grad); color: #fff; margin-bottom: 16px;
  box-shadow: 0 8px 18px rgba(14, 165, 233, 0.3);
}
.at-pillar h4 { font-size: 17px; font-weight: 800; color: var(--at-navy); margin: 0 0 6px; }
.at-pillar p { font-size: 13.5px; color: var(--at-muted); margin: 0; line-height: 1.7; }

/* ---------- 功能卡片 ---------- */
.at-features { background: var(--at-bg); }
.at-features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.at-feature {
  position: relative;
  padding: 34px 30px;
  background: #fff;
  border: 1px solid var(--at-line);
  border-radius: var(--at-radius);
  overflow: hidden;
  transition: transform 0.28s ease, box-shadow 0.28s ease;
}
.at-feature::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--at-grad);
  opacity: 0;
  transition: opacity 0.28s ease;
}
.at-feature:hover { transform: translateY(-8px); box-shadow: var(--at-shadow); }
.at-feature:hover::before { opacity: 1; }
.at-feature .ic {
  width: 60px; height: 60px; border-radius: 16px;
  display: grid; place-items: center; font-size: 28px;
  background: var(--at-grad-soft); margin-bottom: 20px;
}
.at-feature h4 { font-size: 19px; font-weight: 800; color: var(--at-navy); margin: 0 0 10px; }
.at-feature p { font-size: 14.5px; color: var(--at-muted); line-height: 1.8; margin: 0; }
.at-feature .num {
  position: absolute; top: 20px; right: 24px;
  font-size: 44px; font-weight: 900; line-height: 1;
  color: #eef5fb;
}

/* ---------- 关于我们 / CTA 区 ---------- */
.at-about { background: #fff; }
.at-about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.at-about-list { list-style: none; padding: 0; margin: 22px 0 30px; display: grid; gap: 14px; }
.at-about-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; color: var(--at-ink); line-height: 1.7; }
.at-about-list li .tick {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--at-grad); color: #fff; font-size: 13px;
  display: grid; place-items: center; margin-top: 2px;
}
.at-about-media { position: relative; }
.at-about-media img { width: 100%; border-radius: var(--at-radius-lg); box-shadow: var(--at-shadow-lg); }
.at-about-media::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: var(--at-radius-lg);
  background: linear-gradient(135deg, rgba(14,165,233,0.18), rgba(20,184,166,0.12));
  pointer-events: none;
}

/* CTA 通栏 */
.at-cta {
  position: relative;
  background: var(--at-grad);
  border-radius: var(--at-radius-lg);
  padding: 60px 64px;
  overflow: hidden;
  color: #fff;
}
.at-cta::before {
  content: "";
  position: absolute;
  width: 360px; height: 360px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  top: -140px; right: -80px;
}
.at-cta::after {
  content: "";
  position: absolute;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: rgba(255,255,255,0.10);
  bottom: -120px; left: 12%;
}
.at-cta h3 { font-size: 30px; font-weight: 900; margin: 0 0 10px; position: relative; z-index: 2; }
.at-cta p { font-size: 15.5px; margin: 0 0 28px; opacity: 0.94; position: relative; z-index: 2; }
.at-cta .at-btn { position: relative; z-index: 2; }
.at-btn-white { background: #fff; color: var(--at-primary); box-shadow: 0 12px 30px rgba(0,0,0,0.18); }
.at-btn-white:hover { color: var(--at-primary); }

/* ---------- 内页通用 Hero ---------- */
.at-page-hero {
  position: relative;
  padding: calc(var(--at-nav-h) + 64px) 0 64px;
  background:
    radial-gradient(700px 380px at 85% -10%, rgba(14, 165, 233, 0.16), transparent 60%),
    linear-gradient(180deg, #eef8ff 0%, #f5f9fc 100%);
  text-align: center;
  overflow: hidden;
}
.at-page-hero h1 { font-size: 40px; font-weight: 900; color: var(--at-navy); margin: 0 0 12px; }
.at-page-hero p { font-size: 16px; color: var(--at-muted); margin: 0; }
.at-page-hero .at-crumb { margin-bottom: 16px; font-size: 13px; color: var(--at-muted); }
.at-page-hero .at-crumb a { color: var(--at-primary); font-weight: 600; }

/* 内容卡片（文章/正文） */
.at-article {
  background: #fff;
  border: 1px solid var(--at-line);
  border-radius: var(--at-radius-lg);
  box-shadow: var(--at-shadow);
  padding: 56px 64px;
  max-width: 900px;
  margin: 0 auto;
}
.at-article .at-article-title { font-size: 30px; font-weight: 900; color: var(--at-navy); text-align: center; margin: 0 0 14px; }
.at-article .at-article-meta { text-align: center; font-size: 13.5px; color: var(--at-muted); margin-bottom: 30px; padding-bottom: 26px; border-bottom: 1px solid var(--at-line); }
.at-article-body { font-size: 16px; line-height: 2; color: var(--at-ink); }
.at-article-body p { margin: 0 0 18px; }
.at-article-body h4 { font-size: 20px; font-weight: 800; color: var(--at-navy); margin: 28px 0 12px; }
.at-article-body img { max-width: 100%; height: auto; border-radius: 12px; margin: 12px 0; }

/* 联系方式卡片 */
.at-contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; }
.at-contact-card {
  background: #fff; border: 1px solid var(--at-line); border-radius: var(--at-radius);
  padding: 30px 28px; text-align: center; transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.at-contact-card:hover { transform: translateY(-6px); box-shadow: var(--at-shadow); }
.at-contact-card .ic { width: 58px; height: 58px; border-radius: 16px; background: var(--at-grad-soft); display: grid; place-items: center; font-size: 26px; margin: 0 auto 16px; }
.at-contact-card h4 { font-size: 16px; font-weight: 800; color: var(--at-navy); margin: 0 0 8px; }
.at-contact-card p { font-size: 14.5px; color: var(--at-muted); margin: 0; line-height: 1.7; }
.at-contact-card p b { color: var(--at-ink); }
.at-contact-card a { color: var(--at-primary); font-weight: 700; }
.at-map { width: 100%; max-width: 860px; border-radius: var(--at-radius-lg); box-shadow: var(--at-shadow); }

/* ---------- 页脚 ---------- */
.at-footer {
  position: relative;
  margin-top: 0;
  background: #0b1b3b;
  color: #cbd5e1;
  padding: 72px 0 0;
  overflow: hidden;
}
.at-footer::before {
  content: "";
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14,165,233,0.18), transparent 70%);
  top: -260px; right: -120px;
}
.at-footer-grid { position: relative; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.at-footer .at-brand img { height: 40px; }
.at-footer-brand-txt { font-size: 13.5px; color: #94a3b8; line-height: 1.8; margin-top: 16px; max-width: 300px; }
.at-footer h5 { font-size: 15px; font-weight: 800; color: #fff; margin: 0 0 18px; letter-spacing: 1px; }
.at-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.at-footer ul a { color: #94a3b8; font-size: 14px; transition: color 0.2s ease; }
.at-footer ul a:hover { color: #fff; }
.at-footer .at-qr { width: 120px; height: 120px; border-radius: 14px; background: #fff; padding: 8px; display: block; }
.at-footer .at-qr img { width: 100%; height: 100%; object-fit: contain; border-radius: 8px; }
.at-footer-bottom {
  position: relative;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  color: #7c8ba1;
}
.at-footer-bottom a { color: #94a3b8; }
.at-footer-bottom a:hover { color: #fff; }

/* ---------- 返回顶部 ---------- */
.at-to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 46px; height: 46px;
  border-radius: 14px;
  background: var(--at-grad);
  color: #fff;
  border: none;
  display: grid; place-items: center;
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--at-shadow);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all 0.3s ease;
  z-index: 1000;
}
.at-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------- 动画 ---------- */
.at-reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.at-reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 991.98px) {
  .at-burger { display: inline-flex; }
  .at-menu {
    position: absolute;
    top: var(--at-nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: #fff;
    padding: 16px;
    border-bottom: 1px solid var(--at-line);
    box-shadow: var(--at-shadow);
    display: none;
  }
  .at-menu.open { display: flex; }
  .at-menu a { padding: 13px 16px; }
  .at-menu a.active::after { display: none; }
  .at-nav-cta { margin: 8px 0 0 0; justify-content: center; }
  .at-hero { padding-top: calc(var(--at-nav-h) + 48px); }
  .at-hero-grid, .at-about-grid { grid-template-columns: 1fr; gap: 40px; }
  .at-hero h1 { font-size: 38px; }
  .at-hero-visual { order: -1; }
  .at-pillars-grid { grid-template-columns: repeat(2, 1fr); }
  .at-features-grid, .at-contact-grid { grid-template-columns: 1fr; }
  .at-footer-grid { grid-template-columns: 1fr 1fr; }
  .at-article { padding: 36px 26px; }
  .at-cta { padding: 40px 28px; }
}
@media (max-width: 575.98px) {
  .at-pillars-grid, .at-footer-grid { grid-template-columns: 1fr; }
  .at-hero h1 { font-size: 31px; }
}

/* ===== 科技资讯页 ===== */
.at-news-hero {
  padding: calc(var(--at-nav-h) + 56px) 0 36px;
  background:
    radial-gradient(1200px 400px at 82% -10%, rgba(14,165,233,.16), transparent 60%),
    linear-gradient(180deg, #f5fbff 0%, #fff 100%);
  border-bottom: 1px solid var(--at-line);
}
.at-news-hero-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; }
.at-news-hero h1 { font-size: 40px; margin: 8px 0 8px; letter-spacing: -0.5px; color: var(--at-navy); }
.at-news-hero p { color: var(--at-muted); max-width: 540px; margin: 0; }
.at-news-hero-meta { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.at-source-badge { font-size: 13px; color: var(--at-primary); background: rgba(14,165,233,.10); border: 1px solid rgba(14,165,233,.28); padding: 6px 12px; border-radius: 999px; }
.at-demo-badge { font-size: 13px; color: #b45309; background: #fef3c7; border: 1px solid #fde68a; padding: 6px 12px; border-radius: 999px; }
.at-update-time { font-size: 13px; color: var(--at-muted); }
.at-demo-note { background: #fffbeb; border: 1px solid #fde68a; color: #92400e; border-radius: 14px; padding: 14px 18px; margin-bottom: 26px; font-size: 14px; line-height: 1.7; }
.at-demo-note code { background: #fef3c7; padding: 1px 6px; border-radius: 6px; font-size: 13px; }

.at-news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.at-news-card { background: #fff; border: 1px solid var(--at-line); border-radius: 18px; overflow: hidden; display: flex; flex-direction: column; transition: transform .25s ease, box-shadow .25s ease; }
.at-news-card:hover { transform: translateY(-6px); box-shadow: var(--at-shadow); }
.at-news-thumb { display: block; aspect-ratio: 16 / 9; overflow: hidden; background: #eef2f7; }
.at-news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.at-news-card:hover .at-news-thumb img { transform: scale(1.05); }
.at-news-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.at-news-title { font-size: 17px; line-height: 1.45; margin: 0; font-weight: 700; }
.at-news-title a { color: var(--at-navy); text-decoration: none; }
.at-news-title a:hover { color: var(--at-primary); }
.at-news-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; color: var(--at-muted); }
.at-news-meta .src { color: var(--at-primary); font-weight: 600; }
.at-news-meta .tag { background: rgba(20,184,166,.12); color: #0f766e; padding: 2px 9px; border-radius: 999px; font-size: 12px; }
.at-news-sum { color: #475569; font-size: 14px; line-height: 1.7; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.at-news-more { margin-top: auto; color: var(--at-primary); font-weight: 600; text-decoration: none; font-size: 14px; }
.at-news-more:hover { text-decoration: underline; }

@media (max-width: 991.98px) {
  .at-news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 575.98px) {
  .at-news-grid { grid-template-columns: 1fr; }
  .at-news-hero h1 { font-size: 30px; }
  .at-news-hero-row { align-items: flex-start; }
}

/* 手动刷新链接与提示 */
.at-refresh-link { cursor: pointer; text-decoration: none; transition: background .2s ease, transform .2s ease; }
.at-refresh-link:hover { background: rgba(14,165,233,.18); transform: translateY(-1px); }
.at-refresh-ok { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.at-refresh-err { background: #fef2f2; border-color: #fecaca; color: #991b1b; }

/* 文章封面图（科技资讯详情） */
.at-article-cover { margin: 8px 0 26px; }
.at-article-cover img { width: 100%; max-height: 420px; object-fit: cover; border-radius: var(--at-radius-lg); box-shadow: var(--at-shadow); }

/* 文末来源与跳转连接 */
.at-source-box {
  margin-top: 36px;
  padding: 20px 22px;
  background: linear-gradient(180deg, #f5fbff 0%, #fff 100%);
  border: 1px solid var(--at-line);
  border-left: 4px solid var(--at-primary);
  border-radius: var(--at-radius);
}
.at-source-line { font-size: 14px; color: var(--at-muted); margin-bottom: 10px; }
.at-source-line b { color: var(--at-navy); }
.at-source-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: #fff; text-decoration: none;
  background: var(--at-grad); padding: 9px 16px; border-radius: 999px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.at-source-link:hover { transform: translateY(-1px); box-shadow: var(--at-shadow); text-decoration: none; }

/* 独立采集页（collect.asp） */
.at-collect-card { max-width: 760px; }
.at-collect-stat { display: flex; gap: 16px; justify-content: center; margin: 18px 0 28px; flex-wrap: wrap; }
.at-stat {
  flex: 1 1 120px; max-width: 200px; text-align: center;
  background: #f8fafc; border: 1px solid var(--at-line); border-radius: var(--at-radius);
  padding: 18px 12px;
}
.at-stat .num { display: block; font-size: 34px; font-weight: 900; color: var(--at-primary); line-height: 1.1; }
.at-stat .lbl { font-size: 13px; color: var(--at-muted); }
.at-collect-sub { font-size: 18px; font-weight: 800; color: var(--at-navy); margin: 6px 0 12px; }
.at-collect-list { list-style: none; padding: 0; margin: 0 0 26px; display: grid; gap: 12px; }
.at-collect-list li {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 16px; border: 1px solid var(--at-line); border-radius: var(--at-radius);
  background: #fff; transition: border-color .2s ease, transform .2s ease;
}
.at-collect-list li:hover { border-color: var(--at-primary); transform: translateX(2px); }
.at-collect-list a { color: var(--at-navy); font-weight: 700; text-decoration: none; font-size: 15px; }
.at-collect-list a:hover { color: var(--at-primary); }
.at-collect-list .meta { font-size: 12.5px; color: var(--at-muted); }
.at-collect-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.at-collect-tip { margin-top: 22px; font-size: 13px; color: var(--at-muted); line-height: 1.7; }
.at-collect-tip code { background: #f1f5f9; padding: 1px 6px; border-radius: 6px; }

/* 下拉加载更多（科技资讯列表） */
.at-news-more-wrap { margin-top: 30px; text-align: center; }
.at-news-loading { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--at-muted); font-size: 14px; padding: 16px 0; }
.at-spinner { width: 18px; height: 18px; border: 2px solid var(--at-line); border-top-color: var(--at-primary); border-radius: 50%; animation: at-spin .8s linear infinite; }
@keyframes at-spin { to { transform: rotate(360deg); } }
.at-news-end { display: inline-block; margin: 0 auto; padding: 10px 24px; border: 1px dashed var(--at-line); border-radius: 999px; color: var(--at-muted); font-size: 13px; background: #fff; cursor: default; }
.at-news-sentinel { height: 1px; width: 100%; cursor: pointer; }

/* ---------- 商城入口（导航“商城”落地页） ---------- */

/* 固定导航占位：顶替原先页面里靠 3 个 <br> 硬撑的写法，
   导航高度变化（--at-nav-h）时页面不会错位 */
.at-page-offset { padding-top: calc(var(--at-nav-h) + 30px); }

/* 页面标题区 */
.at-mall-hero {
  position: relative;
  overflow: hidden;
  padding: 8px 0 34px;
  text-align: center;
}
/* 两团柔和光斑，纯装饰，不拦截点击 */
.at-mall-hero::before {
  content: "";
  position: absolute;
  inset: -140px 0 auto 0;
  height: 340px;
  pointer-events: none;
  background:
    radial-gradient(closest-side, rgba(14, 165, 233, .16), rgba(14, 165, 233, 0) 72%) 18% 58% / 520px 320px no-repeat,
    radial-gradient(closest-side, rgba(20, 184, 166, .14), rgba(20, 184, 166, 0) 72%) 82% 42% / 480px 300px no-repeat;
}
.at-mall-hero > * { position: relative; }
.at-mall-crumb {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--at-muted); margin-bottom: 14px;
}
.at-mall-crumb a { color: var(--at-muted); }
.at-mall-crumb a:hover { color: var(--at-primary); }
.at-mall-crumb .sep { opacity: .5; }
.at-mall-title {
  margin: 0 0 10px;
  font-size: 34px; font-weight: 800; line-height: 1.25;
  color: var(--at-navy); letter-spacing: .5px;
}
.at-mall-title .grad {
  background: var(--at-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.at-mall-sub {
  margin: 0 auto; max-width: 560px;
  font-size: 15px; color: var(--at-muted); line-height: 1.8;
}

/* 卡片网格：4 → 2 → 1。
   刻意跳过 3 列：只有 4 个入口时，3 列会让第二行剩下 1 张孤卡，视觉失衡。 */
.at-mall-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  align-items: stretch;
}

.at-mall-card {
  position: relative;
  box-sizing: border-box;
  background: #fff;
  border: 1px solid var(--at-line);
  border-radius: var(--at-radius-lg);
  padding: 26px 20px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-height: 244px;
  overflow: hidden;
  transition: transform .28s cubic-bezier(.22, .61, .36, 1), box-shadow .28s ease, border-color .28s ease;
}
/* 顶部渐变高亮条：hover / 键盘聚焦时出现 */
.at-mall-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--at-grad);
  opacity: 0;
  transition: opacity .28s ease;
}
/* 渐变描边光晕：用 mask 挖空内部只留 1px 边框。
   不支持 mask-composite 的浏览器只是不显示这层，卡片本体不受影响 */
.at-mall-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--at-grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .28s ease;
  pointer-events: none;
}
.at-mall-card:hover,
.at-mall-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: var(--at-shadow);
  border-color: transparent;
}
.at-mall-card:hover::before,
.at-mall-card:focus-visible::before,
.at-mall-card:hover::after,
.at-mall-card:focus-visible::after { opacity: 1; }
/* 无障碍：键盘可见焦点（WCAG 2.4.7） */
.at-mall-card:focus-visible {
  outline: 2px solid var(--at-primary);
  outline-offset: 3px;
}

.at-mall-icon {
  flex: none;
  width: 76px; height: 76px;
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  background: var(--at-grad-soft);
  margin-bottom: 16px;
  overflow: hidden;
  /* 图标容器尺寸不随图片加载变化，避免布局抖动（CLS） */
  contain: paint;
}
.at-mall-icon img {
  box-sizing: border-box;
  display: block;
  width: 56px; height: 56px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  transition: transform .28s ease;
}
.at-mall-card:hover .at-mall-icon img { transform: scale(1.06); }

/* 视觉重量归一：
   009 的图标是线稿轮廓图（不透明像素约 42%），另外三个是实色（78%–98%），
   直接并排时 009 明显偏浅。给它补一层同色系实色圆角底，使四张图标视觉等重。
   用语义化修饰类而非 src 选择器，换图或改文件名都不会失效。 */
.at-mall-icon--solid img {
  padding: 9px;
  border-radius: 16px;
  background: linear-gradient(160deg, #be123c 0%, #881337 100%);
}

.at-mall-name {
  margin: 0 0 6px;
  font-size: 18px; font-weight: 800; line-height: 1.35;
  color: var(--at-navy);
}
.at-mall-desc {
  margin: 0 0 18px;
  font-size: 13px; color: var(--at-muted); line-height: 1.65;
  min-height: 43px; /* 2 行 ≈ 43px，配合 grid 拉伸保证同行卡片等高 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.at-mall-link {
  margin-top: auto;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 700; color: #fff; text-decoration: none;
  background: var(--at-grad);
  padding: 9px 18px;
  border-radius: 999px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.at-mall-link:hover { transform: translateY(-1px); box-shadow: var(--at-shadow); text-decoration: none; }
/* 箭头随 hover 轻微右移，暗示外链跳转 */
.at-mall-link .arw { display: inline-block; transition: transform .2s ease; }
.at-mall-link:hover .arw { transform: translateX(3px); }

/* 断点：4 → 2 → 1（跳过 3 列，保证每行都能被 4 个入口填满） */
@media (max-width: 991.98px) {
  .at-mall-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 575.98px) {
  .at-mall-grid { grid-template-columns: 1fr; gap: 18px; }
  .at-mall-card { min-height: 0; padding: 22px 18px; }
  .at-mall-desc { min-height: 0; -webkit-line-clamp: 3; }
  .at-mall-title { font-size: 26px; }
  .at-mall-sub { font-size: 14px; }
  .at-page-offset { padding-top: calc(var(--at-nav-h) + 18px); }
}

/* 无障碍：尊重系统“减弱动效”偏好（WCAG 2.3.3） */
@media (prefers-reduced-motion: reduce) {
  .at-mall-card,
  .at-mall-card::before,
  .at-mall-card::after,
  .at-mall-icon img,
  .at-mall-link,
  .at-mall-link .arw { transition: none; }
  .at-mall-card:hover,
  .at-mall-card:focus-visible { transform: none; }
  .at-mall-card:hover .at-mall-icon img,
  .at-mall-link:hover { transform: none; }
}

/* ---------- 账户管理使用教程（/account.php 独立页，不进入导航） ---------- */
.at-tut-hero {
  position: relative;
  overflow: hidden;
  padding: 8px 0 34px;
  text-align: center;
}
.at-tut-hero::before {
  content: "";
  position: absolute;
  inset: -140px 0 auto 0;
  height: 340px;
  pointer-events: none;
  background:
    radial-gradient(closest-side, rgba(14, 165, 233, .16), rgba(14, 165, 233, 0) 72%) 18% 58% / 520px 320px no-repeat,
    radial-gradient(closest-side, rgba(20, 184, 166, .14), rgba(20, 184, 166, 0) 72%) 82% 42% / 480px 300px no-repeat;
}
.at-tut-hero > * { position: relative; }
.at-tut-crumb {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--at-muted); margin-bottom: 14px;
}
.at-tut-crumb a { color: var(--at-muted); }
.at-tut-crumb a:hover { color: var(--at-primary); }
.at-tut-crumb .sep { opacity: .5; }
.at-tut-title {
  margin: 0 0 10px;
  font-size: 34px; font-weight: 800; line-height: 1.25;
  color: var(--at-navy); letter-spacing: .5px;
}
.at-tut-title .grad {
  background: var(--at-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.at-tut-sub {
  margin: 0 auto; max-width: 600px;
  font-size: 15px; color: var(--at-muted); line-height: 1.8;
}

/* 步骤流 */
.at-tut-steps { display: grid; gap: 64px; }
.at-tut-step {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: center;
}
/* 偶数步截图放左侧，形成左右交替节奏 */
.at-tut-step:nth-child(even) .at-tut-shot { order: -1; }
.at-tut-step-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.at-tut-num {
  flex: none;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: var(--at-grad);
  color: #fff;
  font-size: 20px; font-weight: 800;
  box-shadow: 0 6px 16px rgba(14, 165, 233, .28);
}
.at-tut-step-title { margin: 0; font-size: 22px; font-weight: 800; color: var(--at-navy); line-height: 1.35; }
.at-tut-step-body { font-size: 15px; color: var(--at-ink); line-height: 1.9; }
.at-tut-step-body p { margin: 0 0 12px; }
.at-tut-step-body p:last-child { margin-bottom: 0; }
.at-tut-step-body b { color: var(--at-navy); }
.at-tut-step-body .kw {
  color: var(--at-primary); font-weight: 700;
}
.at-tut-operate {
  display: inline-flex; align-items: center; gap: 4px;
  background: #f0f9ff;
  border: 1px solid #e0f2fe;
  color: #0369a1;
  font-size: 13.5px; font-weight: 700;
  padding: 2px 10px;
  border-radius: 8px;
}

/* 截图卡片（手机界面） */
.at-tut-shot {
  position: relative;
  border-radius: 22px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--at-line);
  box-shadow: var(--at-shadow);
  transition: transform .3s cubic-bezier(.22, .61, .36, 1), box-shadow .3s ease;
}
.at-tut-shot:hover { transform: translateY(-4px); box-shadow: var(--at-shadow-lg); }
.at-tut-shot img {
  display: block;
  width: 100%;
  aspect-ratio: 431 / 738; /* 与截图同比例，加载前后零抖动 */
  border-radius: 14px;
  background: #f8fafc;
}
.at-tut-shot .tag {
  position: absolute;
  top: -12px; left: 18px;
  background: var(--at-grad);
  color: #fff;
  font-size: 12.5px; font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(14, 165, 233, .32);
}
.at-tut-shot-cap {
  text-align: center;
  margin-top: 10px;
  font-size: 13px; color: var(--at-muted);
}

/* 温馨提示 */
.at-tut-tips {
  margin-top: 56px;
  background: #f8fafc;
  border: 1px solid var(--at-line);
  border-left: 4px solid var(--at-primary);
  border-radius: var(--at-radius);
  padding: 22px 26px;
}
.at-tut-tips h3 { margin: 0 0 12px; font-size: 17px; font-weight: 800; color: var(--at-navy); }
.at-tut-tips ul { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.at-tut-tips li { font-size: 14px; color: var(--at-ink); line-height: 1.75; }

/* 响应式：平板与手机上下堆叠 */
@media (max-width: 991.98px) {
  .at-tut-step { grid-template-columns: 1fr; gap: 26px; }
  .at-tut-step:nth-child(even) .at-tut-shot { order: 0; }
  .at-tut-shot { max-width: 320px; margin: 0 auto; }
  .at-tut-steps { gap: 52px; }
  .at-tut-tips { margin-top: 44px; }
}
@media (max-width: 575.98px) {
  .at-tut-title { font-size: 26px; }
  .at-tut-sub { font-size: 14px; }
  .at-tut-step-head { gap: 10px; }
  .at-tut-num { width: 38px; height: 38px; font-size: 17px; border-radius: 12px; }
  .at-tut-step-title { font-size: 19px; }
  .at-tut-step-body { font-size: 14.5px; }
  .at-tut-tips { padding: 18px 18px; }
}

/* 减弱动效 */
@media (prefers-reduced-motion: reduce) {
  .at-tut-shot { transition: none; }
  .at-tut-shot:hover { transform: none; box-shadow: var(--at-shadow); }
}