/* ==========================================================
   IEERA UNIVERSITY GLOBAL ARTICLE PAGE STYLESHEET
   爱锐大学 Joomla 文章页全局基础样式表
   ----------------------------------------------------------
   用途：
   1. 提供 Joomla 文章页面通栏基础规则；
   2. 提供统一内容容器、按钮、标签、动效、响应式基础类；
   3. 页面代码中只需调用这些 class，不必重复写通用 CSS；
   4. 每个页面仍需保留独立 ID，例如 #ieera-study-at-ieera-page；
   5. 页面专属设计 CSS 应继续使用页面 ID 命名空间，避免污染其他页面。
   ========================================================== */


/* ==========================================================
   1. IEERA DESIGN TOKENS / 全局设计变量
   ========================================================== */

:root {
  --ieera-blue: #12a7d8;
  --ieera-blue-dark: #087eaa;
  --ieera-cyan: #20c5e8;
  --ieera-green: #29c987;

  --ieera-dark: #14242c;
  --ieera-dark-2: #0f1b22;
  --ieera-charcoal: #11191f;
  --ieera-ink: #241713;

  --ieera-rust: #c85b2e;
  --ieera-orange: #d95b26;
  --ieera-gold: #e3b15b;
  --ieera-sand: #dfc9a6;
  --ieera-cream: #f4efe7;

  --ieera-text: #26343d;
  --ieera-muted: #6c7a84;
  --ieera-light: #f5f7f8;
  --ieera-white: #ffffff;

  --ieera-line: rgba(20,36,44,.14);
  --ieera-line-light: rgba(255,255,255,.16);

  --ieera-shadow: 0 28px 70px rgba(7, 29, 40, .18);
  --ieera-shadow-soft: 0 18px 45px rgba(20,36,44,.10);

  --ieera-radius: 26px;
  --ieera-radius-lg: 34px;

  --ieera-container: 1180px;
  --ieera-container-wide: 1320px;
}


/* ==========================================================
   2. GLOBAL OVERFLOW CONTROL / 防止通栏造成横向滚动条
   ========================================================== */

html,
body {
  overflow-x: hidden !important;
}


/* ==========================================================
   3. JOOMLA PARENT UNLOCK CLASS / Joomla 父容器解锁类
   ----------------------------------------------------------
   说明：
   - 页面 JS 会自动把 .ieera-unlocked-parent 加到 Joomla 文章父级容器上。
   - 作用是解除 Joomla .container / article / main 等父级的宽度、padding、overflow 限制。
   - 不建议手动加到普通内容模块上。
   ========================================================== */

.ieera-unlocked-parent {
  width: 100% !important;
  max-width: none !important;
  min-width: 0 !important;

  margin-left: 0 !important;
  margin-right: 0 !important;

  padding-left: 0 !important;
  padding-right: 0 !important;

  overflow: visible !important;

  flex: 0 0 100% !important;
  grid-column: 1 / -1 !important;
  max-inline-size: none !important;
}


/* ==========================================================
   4. PAGE ROOT BASE / 页面根容器基础类
   ----------------------------------------------------------
   使用方式：
   <section id="ieera-some-page" class="ieera-page">
     ...
   </section>

   注意：
   - 不要在 .ieera-page 上使用 width:100vw / translateX / margin-left:-50vw。
   - .ieera-page 只作为普通页面根容器。
   - 真正通栏由每个 .ieera-section 通过 JS 单独计算。
   ========================================================== */

.ieera-page {
  position: relative !important;
  display: block !important;

  width: 100% !important;
  max-width: none !important;

  margin: 0 !important;
  padding: 0 !important;

  left: auto !important;
  right: auto !important;
  transform: none !important;

  overflow: visible !important;
  clear: both !important;
  isolation: isolate;

  color: var(--ieera-text);
  background: #fff;

  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    Arial,
    "Noto Sans",
    "PingFang SC",
    "Microsoft YaHei",
    sans-serif;
}

.ieera-page *,
.ieera-page *::before,
.ieera-page *::after {
  box-sizing: border-box;
}

.ieera-page a {
  color: inherit;
  text-decoration: none;
}


/* ==========================================================
   5. SECTION-LEVEL FULL-BLEED BASE / 页面大区块基础类
   ----------------------------------------------------------
   使用方式：
   <section class="ieera-section hero-section">
     <div class="ieera-container">
       ...
     </div>
   </section>

   说明：
   - 每个大区块都必须加 .ieera-section。
   - JS 会逐个计算 .ieera-section 距离浏览器左侧的位置，并让它撑满浏览器。
   ========================================================== */

.ieera-page .ieera-section {
  position: relative !important;

  width: 100% !important;
  max-width: none !important;

  margin-left: 0 !important;
  margin-right: 0 !important;

  padding-left: 0 !important;
  padding-right: 0 !important;

  overflow: hidden !important;
  box-sizing: border-box !important;
}


/* ==========================================================
   6. CONTENT CONTAINERS / 内容安全区
   ========================================================== */

.ieera-page .ieera-container {
  width: 100% !important;
  max-width: var(--ieera-container) !important;

  margin-left: auto !important;
  margin-right: auto !important;

  padding-left: 24px !important;
  padding-right: 24px !important;

  box-sizing: border-box !important;
}

.ieera-page .ieera-container-wide {
  width: 100% !important;
  max-width: var(--ieera-container-wide) !important;

  margin-left: auto !important;
  margin-right: auto !important;

  padding-left: 24px !important;
  padding-right: 24px !important;

  box-sizing: border-box !important;
}

.ieera-page .ieera-container-narrow {
  width: 100% !important;
  max-width: 880px !important;

  margin-left: auto !important;
  margin-right: auto !important;

  padding-left: 24px !important;
  padding-right: 24px !important;

  box-sizing: border-box !important;
}


/* ==========================================================
   7. TYPOGRAPHIC UTILITIES / 通用文字组件
   ========================================================== */

.ieera-page .ieera-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;

  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-weight: 800;

  color: var(--ieera-blue);
}

.ieera-page .ieera-kicker::before {
  content: "";
  width: 38px;
  height: 1px;
  background: currentColor;
  opacity: .65;
}

.ieera-page .ieera-kicker-light {
  color: rgba(255,255,255,.86);
}

.ieera-page .ieera-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;

  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-weight: 900;
}

.ieera-page .ieera-muted {
  color: var(--ieera-muted);
}


/* ==========================================================
   8. BUTTONS / 通用按钮
   ========================================================== */

.ieera-page .ieera-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  min-height: 46px;
  padding: 0 22px;

  border-radius: 999px;

  font-size: 13px;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
  text-decoration: none;

  cursor: pointer;
  white-space: nowrap;

  transition:
    transform .35s ease,
    box-shadow .35s ease,
    background .35s ease,
    color .35s ease,
    border-color .35s ease;
}

.ieera-page .ieera-btn svg {
  width: 15px;
  height: 15px;
  transition: transform .35s ease;
}

.ieera-page .ieera-btn:hover {
  transform: translateY(-3px);
}

.ieera-page .ieera-btn:hover svg {
  transform: translateX(5px);
}

.ieera-page .ieera-btn-primary {
  background: var(--ieera-white);
  color: var(--ieera-ink);
  box-shadow: 0 18px 38px rgba(0,0,0,.16);
}

.ieera-page .ieera-btn-dark {
  background: var(--ieera-ink);
  color: var(--ieera-white);
  box-shadow: 0 18px 38px rgba(20,36,44,.18);
}

.ieera-page .ieera-btn-blue {
  background: var(--ieera-blue);
  color: var(--ieera-white);
  box-shadow: 0 18px 38px rgba(18,167,216,.24);
}

.ieera-page .ieera-btn-outline {
  color: var(--ieera-white);
  border: 1px solid rgba(255,255,255,.55);
  background: transparent;
}

.ieera-page .ieera-btn-outline-dark {
  color: var(--ieera-ink);
  border: 1px solid rgba(36,23,19,.22);
  background: transparent;
}


/* ==========================================================
   9. REVEAL ANIMATION / 滚动出现动画
   ----------------------------------------------------------
   使用方式：
   <div class="ieera-reveal" data-delay="120">...</div>
   页面 JS 负责添加 .is-visible。
   ========================================================== */

.ieera-page .ieera-reveal,
.ieera-page .reveal {
  opacity: 0;
  transform: translateY(34px);
  transition:
    opacity .85s ease,
    transform .85s ease;
}

.ieera-page .ieera-reveal.is-visible,
.ieera-page .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ==========================================================
   10. IMAGE / CARD BASICS / 通用图片与卡片基础
   ========================================================== */

.ieera-page img {
  max-width: 100%;
  height: auto;
}

.ieera-page .ieera-img-cover {
  position: absolute;
  inset: 0;

  width: 100%;
  height: 100%;

  object-fit: cover;
}

.ieera-page .ieera-card {
  position: relative;
  border-radius: var(--ieera-radius);
  background: #fff;
  box-shadow: var(--ieera-shadow-soft);
  overflow: hidden;
}

.ieera-page .ieera-glass {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.20);
  backdrop-filter: blur(14px);
}


/* ==========================================================
   11. RESPONSIVE BASE / 响应式基础
   ========================================================== */

@media (max-width: 760px) {
  .ieera-page .ieera-container,
  .ieera-page .ieera-container-wide,
  .ieera-page .ieera-container-narrow {
    padding-left: 16px !important;
    padding-right: 16px !important;
  }

  .ieera-page .ieera-btn {
    min-height: 44px;
    padding-left: 18px;
    padding-right: 18px;
    font-size: 12px;
  }
}


/* ==========================================================
   12. REDUCED MOTION / 减少动画偏好
   ========================================================== */


/*
==========================================================
Reduced Motion Policy

IEERA University pages are experience-driven brand pages.
Core visual motion is part of the intended presentation.

The default prefers-reduced-motion override is intentionally
not applied globally because it may silently disable:

- Hero animations
- SVG motion
- Scroll storytelling
- Interactive transitions

Future accessibility controls should be implemented through
explicit IEERA Experience Settings rather than browser-level
automatic suppression.

@media (prefers-reduced-motion: reduce) {
  .ieera-page *,
  .ieera-page *::before,
  .ieera-page *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
  }
}
==========================================================
*/