:root {
  --teal: #00b8ae;
  --teal-d: #008f87;
  --teal-dd: #006f69;
  --teal-xl: #e0f9f8;
  --teal-l: #b2f0ed;
  --gold: #f5a623;
  --text: #1a2a2a;
  --text-m: #4a6060;
  --text-l: #7a9090;
  --bg: #f4fffe;
  --white: #fff;
  --radius: 16px;
  --shadow: 0 4px 24px rgba(0,184,174,0.10);
  --shadow-h: 0 8px 40px rgba(0,184,174,0.22);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
img { display: block; width: 100%;  object-fit: cover; object-position: center; }

/* ══════════════════════════════
   HERO
══════════════════════════════ */
.campus-hero {
  background: linear-gradient(135deg, var(--teal-dd) 0%, var(--teal) 60%, #00d4c8 100%);
  padding: 64px 40px 0;
  position: relative;
  overflow: hidden;
}
/* decorative blobs */
.campus-hero::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  top: -220px; right: -160px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  pointer-events: none;
}
.campus-hero::after {
  content: '';
  position: absolute;
  width: 320px; height: 320px;
  bottom: 80px; left: -100px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  pointer-events: none;
}

/* top eyebrow */
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 50px;
  padding: 5px 16px;
  font-size: 0.78rem; font-weight: 700;
  color: rgba(255,255,255,0.9); letter-spacing: 1px;
  margin-bottom: 18px;
}
.hero-eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--gold); display: inline-block;
  animation: blink 1.8s infinite;
}
@keyframes blink {
  0%,100% { opacity: 1; } 50% { opacity: 0.3; }
}

/* two-col layout */
.hero-body {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: 56px;
  align-items: end;
  position: relative; z-index: 1;
}

.hero-left { padding-bottom: 52px; }

.hero-title {
  font-size: 2.8rem; font-weight: 900; color: #fff;
  line-height: 1.18; letter-spacing: 1px;
  margin-bottom: 16px;
}
.hero-title em { font-style: normal; color: #a8f5f1; }

.hero-desc {
  font-size: 1rem; color: rgba(255,255,255,0.78);
  max-width: 460px; line-height: 1.75; margin-bottom: 32px;
}

/* stats row */
.hero-stats {
  display: flex; gap: 0;
  margin-bottom: 36px;
}
.hero-stat {
  padding: 0 28px 0 0;
  margin-right: 28px;
  border-right: 1px solid rgba(255,255,255,0.2);
}
.hero-stat:last-child { border-right: none; }
.hero-stat .num {
  font-size: 2rem; font-weight: 900; color: #fff; line-height: 1;
}
.hero-stat .num span { font-size: 1.1rem; font-weight: 700; }
.hero-stat .lbl { font-size: 0.78rem; color: rgba(255,255,255,0.6); margin-top: 4px; }

/* nav pills */
.hero-pills {
  display: flex; gap: 10px; flex-wrap: wrap;
}
.hero-pill {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.28);
  border-radius: 50px;
  padding: 8px 22px;
  font-size: 0.88rem; font-weight: 600; color: #fff;
  cursor: pointer; transition: background 0.2s;
  text-decoration: none;
}
.hero-pill:hover { background: rgba(255,255,255,0.25); }
.hero-pill.active {
  background: #fff; color: var(--teal-d);
}

/* right: photo collage */
.hero-right {
  position: relative;
  align-self: end;
}
.hero-collage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 180px 140px;
  gap: 10px;
}
.hc-item {
  border-radius: 14px 14px 0 0;
  overflow: hidden;
  position: relative;
  background: rgba(255,255,255,0.1);
}
.hc-item:first-child {
  grid-column: span 2;
  border-radius: 14px 14px 0 0;
}
.hc-item img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center;
  display: block;
  transition: transform 0.4s;
}
.hc-item:hover img { transform: scale(1.05); }
.hc-item .hc-label {
  position: absolute; bottom: 10px; left: 12px;
  background: rgba(0,80,76,0.75);
  backdrop-filter: blur(4px);
  color: #fff; font-size: 0.72rem; font-weight: 600;
  padding: 3px 10px; border-radius: 20px;
}

/* bottom anchor bar */
.hero-anchor {
  position: relative; z-index: 2;
  max-width: 1280px; margin: 0 auto;
  display: flex; gap: 0;
  padding-top: 48px;
}
.anchor-item {
  flex: 1;
  display: flex; align-items: center; gap: 12px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  border-bottom: none;
  padding: 18px 24px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
  border-radius: 14px 14px 0 0;
}
.anchor-item + .anchor-item { margin-left: 6px; }
.anchor-item:hover { background: rgba(255,255,255,0.22); }
.anchor-icon {
  width: 42px; height: 42px; border-radius: 12px; flex-shrink: 0;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
}
.anchor-text .a-title { font-size: 0.95rem; font-weight: 700; color: #fff; }
.anchor-text .a-sub { font-size: 0.75rem; color: rgba(255,255,255,0.6); margin-top: 1px; }
.anchor-arrow { margin-left: auto; color: rgba(255,255,255,0.5); font-size: 1rem; }

@media (max-width: 1024px) {
  .hero-body { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .hero-left { padding-bottom: 0; }
  .campus-hero { padding: 56px 24px 0; }
  .hero-anchor { padding-top: 32px; }
}
@media (max-width: 640px) {
  .hero-title { font-size: 1.9rem; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
  .hero-stat { border-right: none; padding-right: 0; margin-right: 0; }
  .hero-anchor { flex-direction: column; gap: 6px; }
  .anchor-item { border-radius: 12px; border: 1px solid rgba(255,255,255,0.18); }
}

/* ══════════════════════════════
   SECTION COMMON
══════════════════════════════ */
.section { padding: 72px 32px;  margin: 0 auto; }
.section-head { margin-bottom: 44px; }
.section-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 1.6rem; font-weight: 900; color: var(--text);
  margin-bottom: 10px;
}
.section-label::before {
  content: ''; width: 6px; height: 1.6rem;
  background: linear-gradient(180deg, var(--teal), var(--teal-d));
  border-radius: 3px; display: inline-block; flex-shrink: 0;
}
.section-desc { font-size: 0.95rem; color: var(--text-m); max-width: 560px; margin-top: 8px; }

/* img overlay card */
.img-card {
  position: relative; overflow: hidden;
  border-radius: var(--radius);
  cursor: pointer;
  background: var(--teal-xl);
}
.img-card img {
  transition: transform 0.45s ease;
}
.img-card:hover img { transform: scale(1.06); }
.img-card .overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0,80,76,0.72) 0%, transparent 55%);
  opacity: 0;
  transition: opacity 0.3s;
  display: flex; align-items: flex-end; padding: 20px;
}
.img-card:hover .overlay { opacity: 1; }
.overlay-text {
  color: #fff; font-size: 0.88rem; font-weight: 600; line-height: 1.4;
}
.img-card .tag {
  position: absolute; top: 14px; left: 14px;
  background: var(--teal); color: #fff;
  font-size: 0.7rem; font-weight: 700;
  padding: 3px 10px; border-radius: 20px;
}

/* ══════════════════════════════
   S1: 学员学习
══════════════════════════════ */
#study { background: var(--white); }

/* row 1: 1 big + 3 small */
.study-row1 {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 300px;
  gap: 14px;
  margin-bottom: 14px;
}
/* row 2: 4 equal */
.study-row2 {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  grid-template-rows: 200px;
  gap: 14px;
  margin-bottom: 14px;
}
/* row 3: 3 equal */
.study-row3 {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  grid-template-rows: 220px;
  gap: 14px;
  margin-bottom: 40px;
}

/* feature cards */
.study-feature {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 20px;
}
.study-feat-card {
  background: var(--teal-xl);
  border-radius: var(--radius);
  padding: 24px 22px;
  display: flex; align-items: flex-start; gap: 16px;
  border: 1px solid var(--teal-l);
  transition: box-shadow 0.2s;
}
.study-feat-card:hover { box-shadow: var(--shadow); }
.feat-icon {
  width: 48px; height: 48px; border-radius: 14px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--teal), var(--teal-d));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
}
.feat-title { font-size: 0.95rem; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.feat-desc { font-size: 0.82rem; color: var(--text-m); line-height: 1.5; }

/* ══════════════════════════════
   S2: 学员活动
══════════════════════════════ */
#activity { background: var(--bg); }

/* row 1: 3 cards */
.activity-cards {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 20px;
  margin-bottom: 20px;
}
.activity-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
  cursor: pointer;
}
.activity-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-h); }
.activity-img { height: 200px; overflow: hidden; position: relative; background: var(--teal-xl); }
.activity-img img { height: 100%; transition: transform 0.4s; }
.activity-card:hover .activity-img img { transform: scale(1.07); }
.activity-body { padding: 18px 20px 22px; }
.activity-tag {
  display: inline-block;
  background: var(--teal-xl); color: var(--teal-d);
  font-size: 0.7rem; font-weight: 700;
  padding: 2px 10px; border-radius: 20px; margin-bottom: 8px;
}
.activity-title { font-size: 1rem; font-weight: 800; color: var(--text); margin-bottom: 6px; line-height: 1.4; }
.activity-desc { font-size: 0.83rem; color: var(--text-m); line-height: 1.5; margin-bottom: 14px; }
.activity-meta {
  display: flex; align-items: center; gap: 14px;
  font-size: 0.78rem; color: var(--text-l);
  padding-top: 12px; border-top: 1px solid var(--teal-xl);
}

/* row 2: photo strip 5 equal */
.activity-strip {
  display: grid;
  grid-template-columns: repeat(5,1fr);
  grid-template-rows: 180px;
  gap: 14px;
  margin-bottom: 20px;
}
/* row 3: 2 wide + 2 narrow */
.activity-row3 {
  display: grid;
  grid-template-columns: 3fr 2fr 2fr 3fr;
  grid-template-rows: 220px;
  gap: 14px;
  margin-bottom: 48px;
}

/* timeline */
.activity-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4,1fr);
}
.activity-timeline::before {
  content: '';
  position: absolute;
  top: 28px; left: 12.5%; right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--teal-l), var(--teal), var(--teal-l));
}
.tl-item { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 0 12px; }
.tl-dot {
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--teal-d));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; flex-shrink: 0;
  box-shadow: 0 0 0 5px var(--teal-xl);
  position: relative; z-index: 1;
}
.tl-body { text-align: center; }
.tl-month { font-size: 0.78rem; color: var(--teal); font-weight: 700; margin-bottom: 3px; }
.tl-name { font-size: 0.9rem; font-weight: 800; color: var(--text); margin-bottom: 3px; }
.tl-note { font-size: 0.78rem; color: var(--text-l); }

/* ══════════════════════════════
   S3: 学校环境
══════════════════════════════ */
#environment { background: var(--white); }

.env-intro {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 56px;
  align-items: center;
  margin-bottom: 32px;
}
.env-list { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
.env-list li {
  display: flex; align-items: flex-start; gap: 12px;
  font-size: 0.9rem; color: var(--text-m);
}
.env-list li::before {
  content: '✦'; color: var(--teal); font-size: 0.7rem;
  margin-top: 4px; flex-shrink: 0;
}
.env-intro-img { height: 320px; border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-h); }

/* row 1: 2 big */
.env-row1 {
  display: grid;
  grid-template-columns: 3fr 2fr;
  grid-template-rows: 260px;
  gap: 14px; margin-bottom: 14px;
}
/* row 2: 4 equal */
.env-row2 {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  grid-template-rows: 200px;
  gap: 14px; margin-bottom: 14px;
}
/* row 3: 3 equal */
.env-row3 {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  grid-template-rows: 200px;
  gap: 14px;
}

/* ══════════════════════════════
   DIVIDER BANNER
══════════════════════════════ */
.divider-banner {
  background: linear-gradient(135deg, var(--teal-dd), var(--teal));
  padding: 48px 40px;
  text-align: center;
}
.divider-banner h2 {
  font-size: 1.7rem; font-weight: 900; color: #fff;
  margin-bottom: 8px; letter-spacing: 1px;
}
.divider-banner p { font-size: 0.95rem; color: rgba(255,255,255,0.75); margin-bottom: 24px; }
.divider-btn {
  display: inline-block;
  background: #fff; color: var(--teal-d);
  font-size: 0.95rem; font-weight: 700;
  padding: 12px 36px; border-radius: 50px;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
}
.divider-btn:hover { opacity: 0.9; transform: translateY(-2px); }

/* ══════════════════════════════
   RESPONSIVE
══════════════════════════════ */
@media (max-width: 1100px) {
  .study-row1 { grid-template-columns: 1fr 1fr; grid-template-rows: 220px; }
  .study-row1 .img-card:first-child { grid-column: span 2; }
  .study-row2 { grid-template-columns: repeat(2,1fr); grid-template-rows: 180px 180px; }
  .study-row3 { grid-template-columns: repeat(2,1fr); }
  .activity-cards { grid-template-columns: repeat(2,1fr); }
  .activity-strip { grid-template-columns: repeat(3,1fr); grid-template-rows: 160px 160px; }
  .activity-row3 { grid-template-columns: 1fr 1fr; grid-template-rows: 180px 180px; }
  .env-intro { grid-template-columns: 1fr; }
  .env-intro-img { height: 240px; }
  .env-row1 { grid-template-columns: 1fr 1fr; }
  .env-row2 { grid-template-columns: repeat(2,1fr); grid-template-rows: 180px 180px; }
  .env-row3 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .campus-hero { padding: 48px 20px 0; }
  .section { padding: 48px 20px; }
  .study-row1,.study-row2,.study-row3 { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .study-row1 .img-card { height: 160px; }
  .study-row2 .img-card,.study-row3 .img-card { height: 140px; }
  .study-feature { grid-template-columns: 1fr; }
  .activity-cards { grid-template-columns: 1fr; }
  .activity-strip { grid-template-columns: repeat(2,1fr); grid-template-rows: 140px 140px; }
  .activity-row3 { grid-template-columns: 1fr 1fr; grid-template-rows: 150px; }
  .activity-timeline { grid-template-columns: repeat(2,1fr); gap: 24px; }
  .activity-timeline::before { display: none; }
  .env-row1,.env-row2,.env-row3 { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .env-row1 .img-card,.env-row2 .img-card,.env-row3 .img-card { height: 140px; }
}