/* ===================================================================
   about.css — 关于我们（独立页面）
   1) 全屏 Banner   2) 公司简介（左图右文）   3) 企业文化（暗底玻璃卡）
   4) 资质荣誉（荣誉墙网格）   5) 响应式
   依赖 base.css 的设计变量
   =================================================================== */

/* ===================================================================
   1. 全屏 Banner
   =================================================================== */
/* 结构（铺满、居中、页头偏移）由 base.css 的通用全屏 Banner 提供，这里只写本页背景与蒙版 */
/* Hero 照片已移到 HTML 的 <picture>（横版 Pexels 35158336 / 竖版 about-hero-m.jpg），
   裁切与焦点样式统一在 base.css 的 .page-hero-img */

/* 本页 hero 底部有滚动提示，桌面端多留一点空间，避免与正文挤在一起 */
@media (min-width: 901px) {
  .page-hero { padding-bottom: calc(96px + env(safe-area-inset-bottom, 0px)); }
}

/* 蒙版：左实右透的斜向渐变，压白保证文字可读，右侧留出照片 */
.page-hero-mask {
  background:
    linear-gradient(100deg,
      rgba(255,255,255,.93) 0%,
      rgba(255,255,255,.82) 28%,
      rgba(255,255,255,.50) 60%,
      rgba(255,255,255,.16) 100%),
    linear-gradient(180deg,
      rgba(255,255,255,.42) 0%,
      rgba(255,255,255,.04) 34%,
      rgba(255,255,255,.08) 66%,
      rgba(255,255,255,.58) 100%);
}

.page-hero-title {
  max-width: 820px;
  font-size: clamp(34px, 4.6vw, 62px);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: -.8px;
  color: var(--c-ink);
  text-shadow: 0 1px 2px rgba(255,255,255,.92), 0 8px 30px rgba(255,255,255,.85);
}
.page-hero-sub {
  max-width: 620px;
  margin-top: 26px;
  font-size: 17.5px;
  line-height: 1.95;
  color: rgba(18,49,42,.78);
  text-shadow: 0 1px 10px rgba(255,255,255,.9);
}
.page-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 44px;
}

/* 向下滚动提示 */
.page-hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--c-ink);
  opacity: .55;
  transition: opacity var(--tr);
}
.page-hero-scroll:hover { opacity: 1; }
.page-hero-scroll-line {
  width: 1px; height: 34px;
  background: linear-gradient(180deg, transparent, currentColor);
}
.page-hero-scroll svg {
  width: 20px; height: 20px;
  animation: heroScroll 1.9s ease-in-out infinite;
}
@keyframes heroScroll {
  0%, 100% { transform: translateY(0);   opacity: .5; }
  50%      { transform: translateY(5px); opacity: 1; }
}

/* 区块头：左对齐变体（覆盖 base.css 的居中） */
.section-head--left { text-align: left; }
.section-head--left .section-title::after { margin-left: 0; margin-right: auto; }


/* ===================================================================
   2. 公司简介 —— 左图右文（图文叠压）
   =================================================================== */
.intro { background: #fff; }

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1fr);
  gap: 84px;
  align-items: center;
}

/* 左：主图 + 叠压的小图 + 色块衬托 */
.intro-media {
  position: relative;
  max-width: 640px;
}
.intro-media::before {
  content: "";
  position: absolute;
  top: -26px;
  right: -26px;
  width: 62%;
  height: 58%;
  border-radius: var(--radius-lg);
  background: var(--c-accent-lt);
  z-index: 0;
}
.intro-figure {
  position: relative;
  z-index: 1;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-bg-tint);
  box-shadow: var(--sh-lg);
}
.intro-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 右：正文 + 数据条 */
.intro-body p {
  font-size: 16px;
  line-height: 2.05;
  color: var(--c-text-mute);
}
.intro-body p + p { margin-top: 16px; }

.intro-stats {
  display: flex;
  gap: 56px;
  margin-top: 42px;
  padding-top: 34px;
  border-top: 1px solid var(--c-line);
}
.intro-stat-num {
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.5px;
  color: var(--c-ink);
  font-variant-numeric: tabular-nums;
}
.intro-stat-num i {
  font-style: normal;
  font-size: 21px;
  font-weight: 700;
  color: var(--c-accent);
}
.intro-stat-label {
  margin-top: 9px;
  font-size: 14px;
  color: var(--c-text-mute);
}


/* ===================================================================
   3. 企业文化 —— 实拍大图 + 玻璃卡片（亮调，非暗底）
   =================================================================== */
.culture {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: #F2F7F6;
}
.culture-bg {
  position: absolute;
  /* 上下各多铺 24%，供视差位移用，保证任何滚动位置都不会露边 */
  top: -24%;
  bottom: -24%;
  left: 0;
  right: 0;
  z-index: 0;
  background: url("../images/about/campus-office.jpg") center/cover no-repeat;
  background-color: #F2F7F6;
  transform: translate3d(0, var(--bg-y, 0px), 0);
  will-change: transform;
  backface-visibility: hidden;
}
/* 亮色水洗：白色提亮 + 极淡青绿氛围，保留照片本来的明度与色彩 */
.culture-mask {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(120% 90% at 22% 16%, rgba(18,165,148,.10) 0%, transparent 62%),
    linear-gradient(180deg,
      rgba(255,255,255,.72) 0%,
      rgba(255,255,255,.44) 38%,
      rgba(255,255,255,.44) 62%,
      rgba(255,255,255,.74) 100%);
}
.culture-inner { position: relative; z-index: 2; }

.section-head--photo .section-title { color: var(--c-ink); }
.section-head--photo .section-desc  { color: rgba(18,49,42,.72); }

.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}
.culture-card {
  position: relative;
  overflow: hidden;
  padding: 36px 30px 34px;
  border-radius: var(--radius-lg);
  /* 亮调：白色磨砂玻璃，靠浅描边与柔和投影与背景分层 */
  background: rgba(255,255,255,.80);
  border: 1px solid rgba(255,255,255,.85);
  box-shadow: 0 14px 38px rgba(18,49,42,.10);
  backdrop-filter: blur(16px) saturate(1.08);
  -webkit-backdrop-filter: blur(16px) saturate(1.08);
  transition: transform var(--tr), background var(--tr),
              border-color var(--tr), box-shadow var(--tr);
}
.culture-card:hover {
  transform: translateY(-6px);
  background: rgba(255,255,255,.92);
  border-color: rgba(18,165,148,.45);
  box-shadow: 0 22px 52px rgba(18,49,42,.16);
}
/* 卡片角上的序号水印 */
.culture-index {
  position: absolute;
  right: 18px;
  bottom: 4px;
  font-size: 58px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -2px;
  color: rgba(18,49,42,.08);
  pointer-events: none;
}
.culture-icon {
  display: grid;
  place-items: center;
  width: 54px; height: 54px;
  border-radius: 16px;
  background: rgba(18,165,148,.13);
  color: var(--c-accent);
}
.culture-icon svg { width: 26px; height: 26px; }
.culture-card h3 {
  margin-top: 24px;
  font-size: 20px;
  color: var(--c-ink);
}
.culture-card p {
  margin-top: 13px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--c-text-mute);
}


/* ===================================================================
   4. 资质荣誉 —— 证书轮播
   =================================================================== */
.honors { background: var(--c-bg-alt); }

.honor-carousel { position: relative; padding-left: 34px; padding-right: 34px; }

/* 视口：负外边距抵消内边距，让卡片 hover 上浮的阴影不被裁掉 */
.honor-viewport {
  overflow: hidden;
  padding: 14px 10px 30px;
  margin: -14px -10px -30px;
  touch-action: pan-y;          /* 竖向留给页面滚动，横向手势交给轮播 */
  cursor: grab;
}
.honor-viewport.is-dragging { cursor: grabbing; }

.honor-track {
  --per-view: 3;                /* JS 会读取这个值决定每屏几张 */
  --gap: 30px;
  display: flex;
  gap: var(--gap);
  width: 100%;
  transition: transform .62s cubic-bezier(.4,0,.2,1);
  will-change: transform;
  backface-visibility: hidden;
}
.honor-card {
  flex: 0 0 calc((100% - (var(--per-view) - 1) * var(--gap)) / var(--per-view));
  min-width: 0;
  margin: 0;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
}
.honor-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: var(--sh-md);
}

/* 图片容器：固定 3:4，加载中/失败时显示占位 */
.honor-figure {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background-color: var(--c-bg-tint);
  background-image:
    repeating-linear-gradient(45deg, rgba(18,49,42,.045) 0 10px, transparent 10px 20px);
}
.honor-figure img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s cubic-bezier(.4,0,.2,1);
}
.honor-card:hover .honor-figure img { transform: scale(1.055); }

/* 占位层：图片未就绪或加载失败时可见，加载成功后淡出 */
.honor-figure::after {
  content: "证书图片";
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 33%;
  font-size: 13px;
  letter-spacing: .14em;
  color: rgba(18,49,42,.34);
  background-color: var(--c-bg-tint);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2312312A' stroke-width='1.3' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='4' width='18' height='16' rx='2.5' opacity='.38'/%3E%3Ccircle cx='8.6' cy='9.6' r='1.5' opacity='.38'/%3E%3Cpath d='M4 17.2l4.6-4.4 3.3 3.2 3-2.6 5 4.6' opacity='.38'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center 41%;
  background-size: 46px 46px;
  transition: opacity .45s ease;
  pointer-events: none;
}
.honor-figure.is-loaded::after { opacity: 0; }
/* 加载失败：无论之前是否已成功过，都把占位显示回来 */
.honor-figure.is-error::after { opacity: 1; }

.honor-body { padding: 22px 24px 26px; }
.honor-body h3 {
  font-size: 17px;
  line-height: 1.6;
}
.honor-meta {
  margin-top: 9px;
  font-size: 13.5px;
  color: var(--c-text-mute);
}

/* ---- 左右箭头 ---- */
.honor-nav {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  background: rgba(255,255,255,.94);
  color: var(--c-ink);
  box-shadow: var(--sh-md);
  transform: translateY(-50%);
  transition: background var(--tr), color var(--tr), border-color var(--tr), box-shadow var(--tr);
}
.honor-nav svg { width: 20px; height: 20px; }
.honor-nav:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
  box-shadow: 0 6px 18px rgba(18,165,148,.30);
}
.honor-nav:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}
.honor-nav--prev { left: -20px; }
.honor-nav--next { right: -20px; }

/* ---- 底部指示点 ---- */
.honor-dots {
  margin-top: 6px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 9px;
}
.honor-dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(18,49,42,.20);
  cursor: pointer;
  transition: width var(--tr), background var(--tr);
}
.honor-dot:hover { background: rgba(18,49,42,.38); }
.honor-dot.is-on { width: 26px; background: var(--c-accent); }
.honor-dot:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }

/* 只有一屏时隐藏操作控件 */
.honor-carousel.is-single-page .honor-nav,
.honor-carousel.is-single-page .honor-dots { display: none; }

@media (prefers-reduced-motion: reduce) {
  .honor-track { transition: none; }
  .honor-figure img { transition: none; }
}


/* ===================================================================
   5. 响应式
   =================================================================== */
@media (max-width: 1200px) {
  .culture-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .intro-grid { gap: 60px; }
  .intro-stats { gap: 44px; }
}

@media (max-width: 1080px) {
  /* 图文改为上下排布 */
  .intro-grid { grid-template-columns: 1fr; gap: 56px; }
  .intro-media { max-width: 560px; margin: 0 auto; }

  /* 荣誉轮播：每屏 2 张 */
  .honor-track { --per-view: 2; --gap: 24px; }
  .honor-nav { width: 42px; height: 42px; }
  .honor-nav--prev { left: -20px; }
  .honor-nav--next { right: -20px; }
}

@media (max-width: 900px) {
  .page-hero-title { font-size: 34px; letter-spacing: -.4px; }
  .page-hero-sub { margin-top: 20px; font-size: 15.5px; line-height: 1.9; }
  .page-hero-actions { margin-top: 34px; }
  .page-hero-scroll { display: none; }

  .intro-media { max-width: 520px; }
  .intro-stats { gap: 34px; }
  .intro-stat-num { font-size: 32px; }
  .intro-stat-num i { font-size: 18px; }
}

@media (max-width: 640px) {
  /* 荣誉轮播：每屏 1 张，版心收窄居中，箭头改为压在卡片边缘 */
  .honor-track { --per-view: 1; --gap: 16px; }
  .honor-viewport { max-width: 400px; margin-left: auto; margin-right: auto; }
  .honor-nav { width: 38px; height: 38px; }
  .honor-nav svg { width: 17px; height: 17px; }
  .honor-nav--prev { left: 2px; }
  .honor-nav--next { right: 2px; }
}

@media (max-width: 520px) {
  .page-hero-title { font-size: 29px; }
  .page-hero-sub { font-size: 15px; }
  .page-hero-actions { width: 100%; }
  .page-hero-actions .btn { width: 100%; }

  .culture-grid { grid-template-columns: 1fr; gap: 18px; }
  .culture-card { padding: 28px 24px 26px; }

  /* 窄屏：装饰色块收回版心内，避免被 body 的 overflow-x 裁掉 */
  .intro-media::before { top: -18px; right: 0; }
  .intro-stats { flex-wrap: wrap; gap: 26px 34px; }

  .honor-body { padding: 18px 18px 22px; }
  .honor-body h3 { font-size: 15.5px; }
  .honor-meta { font-size: 13px; }
}