/* ============================================================
   activities.css — 广东财经大学心理咨询中心 · 中心活动页
   设计风格与 homepage.css 保持完全一致：柔和疗愈系
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500&display=swap');

/* ---------- CSS 变量（与 homepage 完全一致） ---------- */
:root {
  --color-primary:    #2d6e6e;
  --color-primary-dk: #1e4f4f;
  --color-primary-lt: #4a9494;
  --color-accent:     #d4845a;
  --color-accent-lt:  #f0b48a;
  --color-bg:         #f7f4ee;
  --color-bg-soft:    #efe9de;
  --color-surface:    #ffffff;
  --color-text:       #2c3030;
  --color-text-soft:  #5a6464;
  --color-text-muted: #8a9898;
  --color-border:     #e0d8cc;

  --font-display: 'Noto Serif SC', 'STSong', serif;
  --font-body:    'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;

  --shadow-sm: 0 2px 8px rgba(45,110,110,.08);
  --shadow-md: 0 6px 24px rgba(45,110,110,.12);
  --shadow-lg: 0 16px 48px rgba(45,110,110,.18);

  --transition: .35s cubic-bezier(.25,.8,.25,1);
  --nav-h: 70px;
}

/* ---------- 全局重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a   { text-decoration: none; color: inherit; }
ul  { list-style: none; }

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   导航栏（与 homepage 完全一致）
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(247,244,238,.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(247,244,238,.97);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary-dk);
  letter-spacing: .03em;
  flex-shrink: 0;
}
.logo img { height: 36px; width: auto; object-fit: contain; }

.nav-menu { display: flex; gap: 4px; align-items: center; }
.nav-menu a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--color-text-soft);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition), background var(--transition);
}
.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%; right: 50%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: left var(--transition), right var(--transition);
}
.nav-menu a:hover { color: var(--color-primary); background: rgba(45,110,110,.06); }
.nav-menu a:hover::after,
.nav-menu a.active::after { left: 12px; right: 12px; }
.nav-menu a.active { color: var(--color-primary); font-weight: 600; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--color-primary);
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.menu-toggle:hover { background: rgba(45,110,110,.08); }

/* ============================================================
   页面 Hero 横幅
   ============================================================ */
.page-hero {
  padding-top: var(--nav-h);
  min-height: 300px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--color-bg);
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -30%; right: -8%;
  width: 60vw; height: 130%;
  background: radial-gradient(ellipse at 65% 40%,
    rgba(74,148,148,.2) 0%,
    rgba(45,110,110,.08) 45%,
    transparent 72%);
  border-radius: 50%;
  animation: blobA 11s ease-in-out infinite alternate;
  pointer-events: none;
}
.page-hero::after {
  content: '';
  position: absolute;
  bottom: -20%; left: -4%;
  width: 40vw; height: 90%;
  background: radial-gradient(ellipse at 30% 70%,
    rgba(212,132,90,.1) 0%,
    transparent 65%);
  border-radius: 50%;
  animation: blobB 14s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes blobA {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(-3%,5%) scale(1.07); }
}
@keyframes blobB {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(2%,-4%) scale(1.09); }
}

.page-hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 72px 0 60px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--color-primary); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--color-primary-dk); }
.breadcrumb .sep { opacity: .45; }

.page-hero-inner h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  color: var(--color-primary-dk);
  letter-spacing: .05em;
  line-height: 1.2;
  opacity: 0;
  transform: translateY(28px);
  animation: fadeUp .75s .15s forwards;
}
.page-hero-inner .hero-sub {
  font-size: 1.1rem;
  color: var(--color-text-soft);
  margin-top: 14px;
  letter-spacing: .02em;
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp .75s .35s forwards;
}

/* 装饰分隔线 */
.page-hero-divider {
  width: 100%;
  height: 64px;
  position: relative;
  overflow: hidden;
}
.page-hero-divider svg {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 100%;
}

/* ============================================================
   活动主内容区
   ============================================================ */
.activities-section {
  padding: 72px 0 96px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-primary-dk);
  letter-spacing: .04em;
  position: relative;
  display: inline-block;
  padding-bottom: 16px;
}
.section-header h2::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 44px; height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 3px;
}
.section-header p {
  font-size: .95rem;
  color: var(--color-text-soft);
  margin-top: 16px;
}

/* ============================================================
   活动卡片网格
   ============================================================ */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.activity-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  /* 滚动入场由 JS 控制 */
  opacity: 0;
  transform: translateY(40px);
}
.activity-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .65s ease, transform .65s ease,
              box-shadow var(--transition), border-color var(--transition);
}
.activity-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

/* 卡片头部 */
.activity-header {
  padding: 36px 28px 28px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, var(--color-primary-dk) 0%, var(--color-primary) 55%, var(--color-primary-lt) 100%);
}
.activity-header::before {
  content: '';
  position: absolute;
  top: -40%; right: -30%;
  width: 200px; height: 200px;
  background: rgba(255,255,255,.07);
  border-radius: 50%;
  pointer-events: none;
}
.activity-header::after {
  content: '';
  position: absolute;
  bottom: -30%; left: -10%;
  width: 140px; height: 140px;
  background: rgba(212,132,90,.15);
  border-radius: 50%;
  pointer-events: none;
}

.activity-icon {
  font-size: 2.8rem;
  line-height: 1;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
  display: block;
  transition: transform .45s cubic-bezier(.34,1.56,.64,1);
}
.activity-card:hover .activity-icon {
  transform: scale(1.15) rotate(-6deg);
}

.activity-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
  letter-spacing: .03em;
}

.activity-category {
  display: inline-block;
  background: rgba(255,255,255,.2);
  backdrop-filter: blur(4px);
  color: rgba(255,255,255,.9);
  padding: 4px 14px;
  border-radius: var(--radius-xl);
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .06em;
  position: relative;
  z-index: 1;
  border: 1px solid rgba(255,255,255,.2);
}

/* 卡片主体 */
.activity-body {
  padding: 28px 28px 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* 基本信息 */
.activity-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--color-border);
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: .875rem;
  color: var(--color-text-soft);
}

.info-icon {
  font-size: 1.05rem;
  flex-shrink: 0;
  margin-top: 2px;
  opacity: .85;
}

.info-text { flex: 1; }

.info-label {
  font-weight: 600;
  color: var(--color-primary-dk);
  font-size: .8rem;
  letter-spacing: .04em;
  display: block;
  margin-bottom: 1px;
}

/* 活动描述 */
.activity-description {
  font-size: .875rem;
  color: var(--color-text-soft);
  line-height: 1.8;
  margin-bottom: 22px;
  flex: 1;
}

/* 数据统计 */
.activity-stats {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.stat {
  flex: 1;
  text-align: center;
  padding: 14px 8px;
  position: relative;
}
.stat + .stat::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 1px;
  background: var(--color-border);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  display: block;
  line-height: 1.2;
}

.stat-label {
  font-size: .72rem;
  color: var(--color-text-muted);
  margin-top: 4px;
  display: block;
  letter-spacing: .04em;
}

/* 操作按钮 */
.activity-footer {
  display: flex;
  gap: 10px;
  margin-top: auto;
}

.btn {
  flex: 1;
  padding: 11px 16px;
  border-radius: var(--radius-xl);
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .03em;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition),
              background var(--transition), color var(--transition), border-color var(--transition);
  text-align: center;
  border: 2px solid var(--color-border);
  background: transparent;
  color: var(--color-text-soft);
}
.btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.btn:active { transform: translateY(0); }

.btn.primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 3px 14px rgba(45,110,110,.3);
}
.btn.primary:hover {
  background: var(--color-primary-dk);
  border-color: var(--color-primary-dk);
  box-shadow: 0 6px 22px rgba(45,110,110,.42);
}

/* ============================================================
   模态框
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(30,79,79,.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn .25s ease;
}
.modal-overlay.active { display: flex; }

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-box {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalSlideUp .3s cubic-bezier(.34,1.46,.64,1);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(40px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* 模态框顶部色条 */
.modal-box::before {
  content: '';
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-lt), var(--color-primary-lt));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-header {
  padding: 24px 28px 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary-dk);
  letter-spacing: .04em;
  line-height: 1.3;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}
.modal-close:hover { color: var(--color-primary-dk); background: var(--color-bg); }

.modal-body { padding: 26px 28px; }

.modal-section { margin-bottom: 24px; }
.modal-section:last-child { margin-bottom: 0; }

.modal-section-title {
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: .06em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.modal-section-title::before {
  content: '';
  display: inline-block;
  width: 3px; height: 14px;
  background: var(--color-accent);
  border-radius: 2px;
}

.modal-section-content {
  font-size: .9rem;
  color: var(--color-text-soft);
  line-height: 1.85;
  white-space: pre-line;
}

.modal-footer {
  padding: 20px 28px 24px;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 12px;
}
.modal-footer .btn { flex: 1; }

/* 报名表单 */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: var(--color-primary-dk);
  letter-spacing: .04em;
  margin-bottom: 7px;
}
.form-label .required { color: var(--color-accent); margin-left: 2px; }

.form-input,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: .9rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  outline: none;
  -webkit-appearance: none;
}
.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(45,110,110,.1);
}
.form-textarea {
  resize: vertical;
  min-height: 90px;
}

/* ============================================================
   页脚（与 homepage 完全一致）
   ============================================================ */
.footer {
  background: var(--color-primary-dk);
  color: rgba(255,255,255,.8);
  padding: 64px 0 0;
}
.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  padding-bottom: 48px;
}
.footer-section h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: .06em;
  position: relative;
  padding-bottom: 12px;
}
.footer-section h3::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 24px; height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.footer-section ul { display: flex; flex-direction: column; gap: 10px; }
.footer-section ul a {
  font-size: .875rem;
  color: rgba(255,255,255,.65);
  transition: color var(--transition), padding-left var(--transition);
}
.footer-section ul a:hover { color: #fff; padding-left: 6px; }
.footer-section p {
  font-size: .875rem;
  color: rgba(255,255,255,.65);
  line-height: 2;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
  text-align: center;
  font-size: .825rem;
  color: rgba(255,255,255,.4);
}

/* ============================================================
   滚动进度条 & 回到顶部
   ============================================================ */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 1001;
  width: 0%;
  transition: width .1s linear;
}

.back-to-top {
  position: fixed;
  bottom: 36px; right: 32px;
  width: 46px; height: 46px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  z-index: 999;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary-dk); transform: translateY(-3px); }

/* ============================================================
   关键帧
   ============================================================ */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .activities-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 62px; }

  .nav-menu {
    display: none;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    background: rgba(247,244,238,.97);
    backdrop-filter: blur(14px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    animation: slideDown .3s ease;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 12px 16px; border-radius: var(--radius-sm); }
  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: none; }
  }
  .menu-toggle { display: flex; }

  .activities-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-content { grid-template-columns: repeat(2, 1fr); }

  .page-hero-inner { padding: 56px 0 44px; }
}

@media (max-width: 560px) {
  .footer-content { grid-template-columns: 1fr; gap: 28px; }
  .activity-footer { flex-direction: column; }
  .modal-footer { flex-direction: column; }
  .modal-box { border-radius: var(--radius-md); }
}