/* ============================================================
   Shifang Packaging — home.css
   首页：Hero 轮播 / 应用场景标签页 / 产品配置 / 使用步骤 / 合作对象 / 一站式服务 / 欢迎视频 / 可持续
   （头部、认证、合作伙伴轮播、页脚等共用组件见 main.css）
   ============================================================ */

/* ---------- 1. Hero（轮播） ---------- */
.hero {
  background: linear-gradient(135deg, #0A2A33 0%, #0D3D47 55%, #0E5460 100%);
  color: #fff;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 64px;
  align-items: center;
  padding: 72px 0 56px;
}
.hero__badge {
  display: inline-block;
  padding: 6px 14px;
  color: #fff;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--r-pill);
}
.hero h1,
.hero__title {
  margin-top: 20px;
  color: #fff;
  font-size: var(--fs-h1);
  line-height: 1.15;
}
.hero__desc {
  margin-top: 20px;
  max-width: 560px;
  font-size: 1.0625rem;
  color: var(--c-on-dark-2);
}
.hero .btn-row { margin-top: 32px; }
.btn--light { background: #fff; color: var(--c-ink); }
.btn--light:hover { background: rgba(255, 255, 255, .9); color: var(--c-ink); }

/* 每屏背景图：后台上传后由模板写入 --hero-img（未上传只用渐变，无静态兜底图） */
.hero__slide {
  background-image:
    linear-gradient(95deg, rgba(10, 42, 51, .94) 0%, rgba(10, 42, 51, .74) 48%, rgba(10, 42, 51, .4) 100%),
    var(--hero-img, none);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

/* 右侧数据卡 */
.hero__panel {
  padding: 28px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--r-lg);
  backdrop-filter: blur(8px);
}
.hero__panel h2 { color: #fff; font-size: 1.125rem; text-align: center; }
.hero__panel > p {
  margin-top: 6px;
  font-size: var(--fs-sm);
  color: var(--c-on-dark-2);
  text-align: center;
}
.hero__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}
.hero__stat {
  padding: 18px 16px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--r-md);
}
.hero__stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--c-teal-light);
}
.hero__stat span { display: block; margin-top: 4px; font-size: var(--fs-sm); color: var(--c-on-dark-2); }

/* 轮播控件（深色底配色） */
.hero .carousel__prev,
.hero .carousel__next {
  color: #fff;
  background: rgba(255, 255, 255, .1);
  border-color: rgba(255, 255, 255, .25);
}
.hero .carousel__prev:hover,
.hero .carousel__next:hover {
  background: rgba(255, 255, 255, .2);
  color: #fff;
  border-color: #fff;
}
.hero .carousel { position: relative; }
/* 圆点叠在图片上，避免底部露出区块背景色 */
.hero .carousel__dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 22px;
  z-index: 2;
  margin-top: 0;
  padding-bottom: 0;
}
.hero .carousel__dot { background: rgba(255, 255, 255, .35); }
.hero .carousel__dot.is-active { background: #fff; }

/* 认证徽章条 */
.hero__badges {
  background: #fff;
  border-bottom: 1px solid var(--c-border);
}
.hero__badges .wrap {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  padding-block: 20px;
}
.hero-badge { display: flex; align-items: center; gap: 12px; }
.hero-badge__ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: none;
  color: var(--c-teal);
  background: var(--c-teal-50);
  border: 1px solid var(--c-teal-100);
  border-radius: 50%;
}
.hero-badge .hero-badge__ic svg {
  display: block;
  width: 20px;
  height: 20px;
  margin: 0;
}
.hero-badge__ic img {
  display: block;
  width: 20px;
  height: 20px;
  object-fit: contain;
}
.hero-badge__txt strong { display: block; font-size: var(--fs-sm); color: var(--c-ink); }
.hero-badge__txt span { display: block; font-size: var(--fs-sm); color: var(--c-text-3); }

/* ---------- 2. 应用场景（标签页） ---------- */
.apps { padding: 72px 0; }
.sec-sub {
  margin: -28px 0 36px;
  text-align: center;
  color: var(--c-text-2);
}
.tabs__nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.tabs__btn {
  padding: 10px 22px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-text-2);
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast);
}
.tabs__btn:hover { color: var(--c-teal); border-color: var(--c-teal); }
.tabs__btn.is-active { background: var(--c-ink); border-color: var(--c-ink); color: #fff; }

.tabs__panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 32px;
  padding: 36px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
}
.tabs__panel[hidden] { display: none; }
.tabs__eyebrow {
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-teal);
}
.tabs__panel h3 { margin-top: 10px; font-size: var(--fs-h2); }
.tabs__panel p { margin-top: 14px; }
.checks { margin-top: 18px; }
.checks li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 26px;
  font-size: var(--fs-sm);
  color: var(--c-text-2);
}
.checks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--c-teal);
}
.checks strong { color: var(--c-ink); }
.diagram {
  position: relative;
  align-self: start;
  overflow: hidden;
  border-radius: var(--r-md);
  background: var(--c-bg-alt);
}
/* 只上传图片：按图片自身比例显示，宽度铺满 */
.diagram--image .diagram__media {
  display: block;
  width: 100%;
  height: auto;
}
/* 上传视频：固定 16:9 播放比例 */
.diagram--video {
  aspect-ratio: 16 / 9;
}
.diagram--video .diagram__media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
}

/* ---------- 3. 产品配置卡片 ---------- */
.products { padding: 72px 0; background: var(--c-bg-alt); }
.prod-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.prod-card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
}
.prod-card__eyebrow {
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-teal);
}
.prod-card h3 { margin-top: 10px; font-size: 1.25rem; }
.prod-card > p { margin-top: 12px; font-size: var(--fs-sm); }
.prod-specs { margin: 16px 0 24px; }
.prod-specs li {
  margin-bottom: 8px;
  font-size: var(--fs-sm);
  color: var(--c-text-2);
}
.prod-specs strong { color: var(--c-ink); }
.prod-card .btn { margin-top: auto; }

/* ---------- 4. 使用步骤 ---------- */
.steps { padding: 72px 0; }
.steps__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}
.step {
  padding: 28px 22px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
}
.step__n {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin: 0 auto;
  font-family: var(--font-display);
  font-weight: 700;
  color: #fff;
  background: var(--c-teal);
  border-radius: 50%;
}
.step h3 { margin-top: 16px; font-size: var(--fs-sm); }
.step p { margin-top: 8px; font-size: var(--fs-sm); color: var(--c-text-2); }

/* ---------- 5. 合作对象（图文交替） ---------- */
.join { padding: 72px 0; }
.join__row { display: grid; grid-template-columns: 1fr 1fr; }
.join__row--rev .join__media { order: 2; }
.join__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.join__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 18px;
  padding: 56px 48px;
  background: #fff;
}
.join__text h2 { font-size: var(--fs-h2); }
.join__text h2 .u {
  color: var(--c-teal);
  border-bottom: 2px solid var(--c-teal);
}
.join__text a,
.join__btn {
  font-weight: 600;
  color: var(--c-ink);
  border-bottom: 1px solid var(--c-ink);
}
.join__btn { padding: 0; background: none; cursor: pointer; }
.join__text a:hover,
.join__btn:hover { color: var(--c-teal); border-color: var(--c-teal); }

/* ---------- 6. 一站式服务 ---------- */
.service { padding: 72px 0; background: var(--c-bg-alt); }
.service__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 48px 40px;
}
.service__item svg { width: 40px; height: 40px; color: var(--c-teal); }
.service__item img { display: block; width: 40px; height: 40px; object-fit: contain; }
.service__item h3 { margin-top: 16px; font-size: 1.125rem; }
.service__item p { margin-top: 10px; font-size: var(--fs-sm); }

/* ---------- 7. 欢迎 / 视频 ---------- */
.welcome { padding: 72px 0; }
.welcome__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.welcome__text h2 { font-size: var(--fs-h2); }
.welcome__text h2::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  margin-top: 14px;
  background: var(--c-teal);
}
.welcome__text p { margin-top: 16px; }
.welcome__media {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-md);
}
.welcome__media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.welcome__play {
  position: absolute;
  inset: 0;
  margin: auto;
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  color: var(--c-teal);
  background: rgba(255, 255, 255, .92);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--t-fast), background var(--t-fast);
}
.welcome__play:hover { transform: scale(1.06); background: #fff; }
.welcome__play svg { width: 28px; height: 28px; margin-left: 3px; }
.welcome__play[hidden] { display: none; }
/* 欢迎视频：原地播放（图为封面 / 只有视频时显示第一帧） */
.welcome__video-wrap { position: relative; }
.welcome__video-el {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #000;
}

/* ---------- 8. 可持续条 ---------- */
.sustain-band {
  padding: 80px 0;
  color: #fff;
  background:
    linear-gradient(rgba(10, 42, 51, .74), rgba(10, 42, 51, .78)),
    var(--sustain-bg, none) center / cover no-repeat;
}
.sustain-band h2 { color: #fff; text-align: center; }
.sustain-band__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px 28px;
  margin-top: 56px;
}
.sustain-item { text-align: center; }
.sustain-item svg { width: 44px; height: 44px; color: #fff; }
.sustain-item img { display: block; width: 44px; height: 44px; margin: 0 auto; object-fit: contain; }
.sustain-item strong { display: block; margin-top: 14px; font-size: var(--fs-sm); color: #fff; }
.sustain-item span { display: block; margin-top: 4px; font-size: var(--fs-sm); color: #fff; }

/* ---------- 9. 我们的使命 ---------- */
.mission { padding: 72px 0; }
.mission__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.mission__img img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
}
.mission__text h2 { font-size: var(--fs-h2); }
.mission__text p { margin-top: 14px; }
.mission__text .btn { margin-top: 28px; }

/* ---------- 9.1 缺图 / 缺媒体时的单栏布局（后台未上传则不占位） ---------- */
.join__row--nomedia { grid-template-columns: 1fr; }
.welcome__grid--nomedia { grid-template-columns: 1fr; }
.mission__grid--noimg { grid-template-columns: 1fr; }

/* 合作伙伴 Logo 卡片样式统一在 main.css（.partner__logo--img） */

/* ---------- 10. 响应式（三端适配） ---------- */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; gap: 36px; padding: 56px 0 40px; }
  .hero__panel { max-width: 560px; }
  .hero__badges .wrap { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__slide {
    background-image:
      linear-gradient(180deg, rgba(10, 42, 51, .92) 0%, rgba(10, 42, 51, .84) 100%),
      var(--hero-img, none);
  }
  .tabs__panel { grid-template-columns: 1fr; }
  .prod-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .join__row { grid-template-columns: 1fr; }
  .join__row--rev .join__media { order: -1; }
  .join__media img { aspect-ratio: 16 / 9; height: auto; }
  .service__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .welcome__grid { grid-template-columns: 1fr; gap: 32px; }
  .sustain-band__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mission__grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 860px) {
  .apps,
  .products,
  .steps,
  .service,
  .welcome,
  .certs,
  .partner,
  .company-news,
  .mission { padding: 56px 0; }
  .sustain-band { padding: 56px 0; }
  .sustain-band__grid { margin-top: 40px; }
  .join__text { padding: 40px 32px; }
}

@media (max-width: 720px) {
  .hero__stats { grid-template-columns: 1fr; }
  .hero__badges .wrap { grid-template-columns: 1fr; }
  .prod-grid,
  .steps__grid,
  .service__grid,
  .sustain-band__grid { grid-template-columns: 1fr; }
  .tabs__panel { padding: 24px; }
  .join__text { padding: 32px 24px; }
  .join__text h2 { font-size: 1.5rem; }
}