/* ═══════════════════════════════════════════════
   天津明希教育科技有限公司 — 官方网站样式
   设计风格：教育品牌 · 蓝橙配色 · Apple 极简排版
   ═══════════════════════════════════════════════ */

/* ─── 1. 设计令牌 ─── */
:root {
  /* 底色 */
  --c-bg:        #F5F7FA;
  --c-white:     #ffffff;

  /* 文字 */
  --c-ink:       #111827;
  --c-ink-80:    #1e293b;
  --c-muted:     #4B5563;
  --c-soft:      #9CA3AF;

  /* 主色：蓝 */
  --c-blue:       #2563EB;
  --c-blue-dark:  #1d4ed8;
  --c-blue-mid:   #3b82f6;
  --c-blue-light: #EFF6FF;
  --c-blue-faint: rgba(37, 99, 235, 0.07);

  /* 点缀色：橙 */
  --c-orange:       #FF7A00;
  --c-orange-light: #FFF7ED;
  --c-orange-faint: rgba(255, 122, 0, 0.08);

  /* 边框 */
  --c-border:    rgba(37, 99, 235, 0.10);
  --c-border-md: rgba(37, 99, 235, 0.18);
  --c-border-gray: rgba(17, 17, 17, 0.08);

  /* 阴影（带蓝调） */
  --shadow-sm:   0 4px 18px rgba(37, 99, 235, 0.07);
  --shadow-md:   0 20px 56px rgba(37, 99, 235, 0.10);
  --shadow-lg:   0 32px 80px rgba(37, 99, 235, 0.14);
  --shadow-card: 0 2px 12px rgba(37, 99, 235, 0.06);

  /* 圆角 */
  --radius-sm:  12px;
  --radius-md:  20px;
  --radius-lg:  28px;
  --radius-xl:  36px;

  /* 动效 */
  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);

  /* 布局 */
  --container:  1200px;
  --section-v:  140px;
}

/* ─── 2. 重置与基础 ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "SF Pro Text",
    "Microsoft YaHei", "Helvetica Neue", sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-ink);
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { list-style: none; }
svg    { display: block; }
img    { display: block; max-width: 100%; }

p { color: var(--c-muted); }

/* ─── 3. 布局 ─── */
.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

.section {
  padding-block: var(--section-v);
  position: relative;
}

.section-alt {
  background: var(--c-bg);
}

/* 分割线 */
.section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg,
    transparent,
    var(--c-border) 30%,
    var(--c-border) 70%,
    transparent);
}
.section:first-of-type::before { display: none; }

/* ─── 4. 排版系统 ─── */
h1 {
  font-size: clamp(3.4rem, 8.5vw, 7.2rem);
  line-height: 0.93;
  letter-spacing: -0.055em;
  font-weight: 700;
  color: var(--c-ink);
}

h2 {
  font-size: clamp(2.6rem, 5.5vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: -0.048em;
  font-weight: 700;
  color: var(--c-ink);
}

h3 {
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 10px;
}

/* 渐变标题：点缀蓝 */
.gradient-text {
  background: linear-gradient(135deg, var(--c-ink) 0%, var(--c-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.eyebrow,
.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-blue);
}

.lead {
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.58;
  letter-spacing: -0.022em;
  color: var(--c-ink-80);
  font-weight: 400;
}

.section-head {
  display: grid;
  gap: 14px;
  margin-bottom: 64px;
}

.section-intro {
  font-size: 1.06rem;
  color: var(--c-muted);
  max-width: 640px;
  line-height: 1.75;
}

/* ─── 5. 导航 ─── */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 200;
  padding: 20px 0;
  transition:
    padding          .42s var(--ease-out),
    background-color .42s var(--ease-out),
    border-color     .42s var(--ease-out),
    box-shadow       .42s var(--ease-out);
}

.site-header.scrolled {
  padding: 13px 0;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--c-blue);
  border-radius: 8px;
  color: var(--c-white);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0;
  flex-shrink: 0;
}

.brand-name {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.main-nav a {
  font-size: 0.9rem;
  color: var(--c-muted);
  transition: color .25s ease, transform .25s ease;
}

.main-nav a:hover {
  color: var(--c-blue);
  transform: translateY(-1px);
}

/* ─── 6. Hero ─── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  /* 白→浅蓝渐变背景 */
  background: linear-gradient(180deg,
    #ffffff 0%,
    #f0f5ff 55%,
    #e8f0fe 100%);
  padding: 160px 0 120px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
}

/* 蓝色主光晕 */
.hero-orb-1 {
  width: 860px;
  height: 860px;
  top: -220px;
  left: 50%;
  transform: translateX(-50%);
  background: radial-gradient(circle,
    rgba(37, 99, 235, 0.14) 0%,
    rgba(96, 165, 250, 0.08) 45%,
    transparent 70%);
}

/* 橙色点缀光晕 */
.hero-orb-2 {
  width: 500px;
  height: 500px;
  bottom: -80px;
  right: -60px;
  background: radial-gradient(circle,
    rgba(255, 122, 0, 0.12) 0%,
    transparent 65%);
  opacity: 0.7;
}

.hero-lines {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 80px;
  padding-bottom: 10%;
  opacity: 0.18;
}

.hero-lines span {
  width: 1px;
  height: 200px;
  background: linear-gradient(180deg,
    transparent,
    var(--c-blue) 40%,
    transparent);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 22px;
  text-align: center;
  max-width: 860px;
}

/* Hero h1 用渐变蓝 */
.hero h1 {
  background: linear-gradient(145deg, var(--c-ink) 0%, var(--c-blue) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-lead {
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  color: var(--c-muted);
  font-weight: 400;
  letter-spacing: -0.01em;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--c-muted);
  line-height: 1.9;
  max-width: 560px;
  margin-inline: auto;
}

.hero-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.hero-tags span {
  padding: 7px 18px;
  border: 1px solid rgba(37, 99, 235, 0.20);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  font-size: 0.85rem;
  color: var(--c-blue);
  font-weight: 600;
  letter-spacing: 0.02em;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.08);
}

.hero-scroll {
  position: absolute;
  bottom: 44px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-line {
  width: 1px;
  height: 56px;
  background: linear-gradient(180deg, var(--c-blue), transparent);
  animation: scroll-pulse 2.4s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.35; transform: scaleY(1);    transform-origin: top; }
  50%       { opacity: 1;    transform: scaleY(1.15); }
}

/* ─── 7. About ─── */
.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 80px;
  align-items: start;
}

.about-left {
  display: grid;
  gap: 20px;
  position: sticky;
  top: 120px;
}

.about-right {
  display: grid;
  gap: 44px;
}

.about-articles {
  display: grid;
  gap: 0;
}

.about-articles article {
  padding: 28px 0;
  border-bottom: 1px solid var(--c-border);
}

.about-articles article:first-child { padding-top: 0; }
.about-articles article:last-child  { border-bottom: none; padding-bottom: 0; }

/* About 引用块：蓝色渐变 */
.about-quote-block {
  margin-top: 80px;
  padding: 52px 60px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--c-blue) 0%, #1d4ed8 60%, #1e40af 100%);
  text-align: center;
  box-shadow: var(--shadow-md);
}

.about-quote-block blockquote {
  font-size: clamp(1.5rem, 3.2vw, 2.6rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.035em;
  color: var(--c-white);
}

/* ─── 8. Services ─── */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-border);
  background: var(--c-bg);
  display: grid;
  align-content: start;
  gap: 20px;
  min-height: 340px;
  box-shadow: var(--shadow-card);
  transition:
    transform     .48s var(--ease-out),
    box-shadow    .48s var(--ease-out),
    border-color  .48s var(--ease-out),
    background    .48s var(--ease-out);
}

.service-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-border-md);
  background: var(--c-white);
}

.service-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--c-blue-light);
  border: 1px solid rgba(37, 99, 235, 0.15);
  color: var(--c-blue);
  transition: background .3s ease;
}

.service-card:hover .service-icon {
  background: var(--c-blue);
  color: var(--c-white);
  border-color: var(--c-blue);
}

.service-icon svg { width: 26px; height: 26px; }

.service-num {
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--c-blue);
  font-weight: 600;
  opacity: 0.6;
}

.service-card h3 { margin-bottom: 0; }
.service-card p  { font-size: 0.94rem; line-height: 1.72; }

/* ─── 9. Values ─── */
.values-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 80px;
  align-items: center;
}

.values-left { display: grid; gap: 24px; }

.values-right { display: grid; gap: 16px; }

.value-item {
  display: flex;
  align-items: flex-start;
  gap: 22px;
  padding: 28px 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--c-border);
  background: var(--c-white);
  box-shadow: var(--shadow-card);
  transition:
    transform    .42s var(--ease-out),
    box-shadow   .42s var(--ease-out),
    border-color .42s var(--ease-out);
}

.value-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-border-md);
}

.value-icon-wrap {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--c-blue-light);
  border: 1px solid rgba(37, 99, 235, 0.15);
  color: var(--c-blue);
  margin-top: 2px;
  transition: background .3s ease, color .3s ease;
}

.value-item:hover .value-icon-wrap {
  background: var(--c-blue);
  color: var(--c-white);
}

.value-icon-wrap svg { width: 22px; height: 22px; }
.value-item h3 { margin-bottom: 6px; }
.value-item p  { font-size: 0.93rem; line-height: 1.7; }

/* ─── 10. News ─── */
.news-list { display: grid; gap: 0; }

.news-item {
  display: grid;
  grid-template-columns: 130px 1fr 32px;
  gap: 28px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--c-border-gray);
  transition:
    transform    .38s var(--ease-out),
    border-color .38s ease;
  cursor: default;
}

.news-list li:first-child {
  border-top: 1px solid var(--c-border-gray);
}

.news-item:hover {
  transform: translateX(6px);
  border-color: var(--c-border);
}

.news-item:hover .news-body h3 {
  color: var(--c-blue);
}

.news-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 3px;
}

.news-date {
  font-size: 0.88rem;
  color: var(--c-soft);
  letter-spacing: 0.08em;
  font-weight: 500;
}

.news-tag {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-blue);
  background: var(--c-blue-light);
  border: 1px solid rgba(37, 99, 235, 0.12);
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
  font-weight: 600;
}

.news-body h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.4;
  color: var(--c-ink-80);
  margin-bottom: 8px;
  transition: color .3s ease;
}

.news-body p { font-size: 0.92rem; line-height: 1.7; }

.news-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-soft);
  opacity: 0;
  transform: translateX(-8px);
  transition:
    opacity   .3s ease,
    transform .3s var(--ease-out),
    color     .3s ease;
  padding-top: 3px;
}

.news-arrow svg { width: 20px; height: 20px; }

.news-item:hover .news-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--c-blue);
}

/* ─── 11. Contact ─── */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 80px;
  align-items: start;
}

.contact-left {
  display: grid;
  gap: 24px;
  position: sticky;
  top: 120px;
}

.contact-card {
  border-radius: var(--radius-xl);
  border: 1px solid var(--c-border);
  background: var(--c-white);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 22px 32px;
  border-bottom: 1px solid var(--c-border-gray);
  transition: background .28s ease;
}

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

.contact-row:hover { background: var(--c-blue-light); }

.contact-label {
  font-size: 0.9rem;
  color: var(--c-soft);
  white-space: nowrap;
}

.contact-row strong {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-ink);
  text-align: right;
}

.contact-email {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-blue);
  text-align: right;
  transition: color .25s ease;
}

.contact-email:hover { color: var(--c-blue-dark); }

/* ─── 12. Footer ─── */
.site-footer {
  padding: 56px 0 48px;
  background: var(--c-ink);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.footer-copy,
.footer-icp {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.42);
  line-height: 1.6;
}

.footer-icp a {
  color: rgba(255, 255, 255, 0.42);
  transition: color .25s ease;
}

.footer-icp a:hover { color: rgba(255, 255, 255, 0.72); }

/* ─── 13. 动画 ─── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity   1s var(--ease-out),
    transform 1s var(--ease-out);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}

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

/* ─── 14. 响应式 ─── */
@media (max-width: 1060px) {
  :root { --section-v: 112px; }

  .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-layout,
  .values-layout,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 52px;
  }

  .about-left,
  .contact-left {
    position: static;
  }
}

@media (max-width: 720px) {
  :root { --section-v: 88px; }

  .container { width: min(100% - 32px, var(--container)); }

  .site-header { padding: 15px 0; }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .main-nav { gap: 18px; }

  .hero {
    padding: 160px 0 100px;
    min-height: 100svh;
  }

  .hero-lines { gap: 36px; }
  .hero-lines span { height: 130px; }

  .service-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .service-card { min-height: auto; }

  .news-item {
    grid-template-columns: 1fr 32px;
    grid-template-rows: auto auto;
  }

  .news-meta {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
  }

  .news-body { grid-column: 1 / 2; }

  .news-arrow {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
    opacity: 1;
    transform: none;
    padding-top: 2px;
  }

  .about-quote-block {
    padding: 40px 28px;
    margin-top: 56px;
  }

  .value-item { gap: 16px; }

  .contact-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .contact-row strong,
  .contact-email { text-align: left; }
}

/* ─── 15. 无障碍 / 减少动画 ─── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal,
  .service-card,
  .news-item,
  .value-item,
  .site-header,
  .main-nav a,
  .scroll-line {
    transition: none;
    animation: none;
  }

  .reveal { opacity: 1; transform: none; }
}