/* ============================================================
   PlantEcho · Verdant Echo 官网
   Section Layouts & Specific Rules (sections.css)
   ============================================================ */

/* HERO 区 */
.hero {
  min-height: 100svh; display: grid; grid-template-columns: 1.05fr .95fr;
  align-items: center; gap: clamp(30px, 5vw, 80px); padding: 140px var(--mar) 90px;
  max-width: var(--maxw); margin-inline: auto; position: relative;
}
.hero-title {
  font-family: var(--serif); font-weight: 300; font-size: clamp(40px, 8vw, 92px);
  line-height: 1.0; letter-spacing: -.025em; color: var(--ink); margin: 18px 0 0;
}
.hero-title span { display: block; }
.hero-title .reveal { opacity: 1; transform: none; }
.hero-title em { font-style: italic; font-weight: 500; color: var(--primary); }
.hero-lede { margin-top: 30px; font-size: clamp(16px, 1.8vw, 19px); color: var(--on-surface-variant); max-width: 520px; }
.hero-actions { margin-top: 38px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { margin-top: 50px; display: flex; gap: clamp(20px, 4vw, 48px); }
.hero-stats dt { font-size: 12.5px; color: var(--on-surface-variant); margin-bottom: 6px; }
.hero-stats dd { font-family: var(--serif); font-size: clamp(26px, 3.4vw, 38px); font-weight: 500; color: var(--primary-container); line-height: 1; }
.hero-stats dd span { font-size: .5em; color: var(--secondary); }

.scroll-cue {
  position: absolute; left: var(--mar); bottom: 32px; font-size: 12px;
  letter-spacing: .16em; text-transform: uppercase; color: var(--on-surface-variant);
  display: flex; align-items: center; gap: 12px;
}
.scroll-cue span { width: 1.5px; height: 42px; background: linear-gradient(var(--secondary), transparent); position: relative; overflow: hidden; }
.scroll-cue span::after {
  content: ""; position: absolute; top: -100%; left: 0; width: 100%; height: 60%; background: var(--primary);
  animation: cue 2.4s var(--ease) infinite;
}
@keyframes cue { to { top: 120%; } }

.hero-plant { display: flex; flex-direction: column; align-items: center; gap: 18px; }
.plant-hint { font-size: 12.5px; color: var(--on-surface-variant); opacity: .7; font-style: italic; font-family: var(--serif); }

/* 3D 截图重叠 Parallax 层 */
.hero-shot-wrap { position: relative; width: 100%; display: flex; justify-content: center; align-items: center; }
.hero-shot {
  position: absolute; width: min(100%, 360px); top: -20px; left: -34px; z-index: 1; opacity: 0.65;
  filter: blur(0.4px); transform: rotate(-4deg); transition: transform 0.8s var(--ease), opacity 0.8s var(--ease);
}
.hero-shot-wrap:hover .hero-shot { transform: rotate(-6deg) translate(-8px, -4px) scale(1.02); opacity: 0.82; }
.hero-plant .plant-card { position: relative; z-index: 2; transform: rotate(1deg); transition: transform 0.6s var(--ease); }
.hero-shot-wrap:hover .plant-card { transform: rotate(0deg) scale(1.01); }

/* 说人话 · Section Specifics */
.voice-container { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(30px, 5vw, 60px); align-items: center; }
.voice-media { width: 100%; }
.translate-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.translate-card { padding: 22px 24px; gap: 8px; }
.t-arrow { font-size: 16px; align-self: flex-start; }
.t-to { font-size: 17px; }
.voice-foot {
  margin-top: 30px; max-width: 640px; font-size: 15px; color: var(--on-surface-variant);
  padding-left: 20px; border-left: 2px solid var(--primary-fixed-dim);
}
/* 心情流动 · Section Specifics */
.moods-container { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(30px, 5vw, 60px); align-items: center; }
.moods-media { width: 100%; }
.mood-stage { display: flex; flex-direction: column; align-items: center; gap: 26px; }
.mood-switch {
  display: inline-flex; gap: 6px; padding: 6px; border-radius: 99px; flex-wrap: wrap; justify-content: center;
  background: var(--sc); border: 1px solid var(--hairline); box-shadow: var(--shadow-soft);
}
.mood-btn {
  font-family: var(--sans); font-size: 14px; font-weight: 600; color: var(--on-surface-variant);
  padding: 8px 18px; border: none; background: transparent; border-radius: 99px; cursor: pointer;
  transition: color .3s var(--ease), background .4s var(--ease);
}
.mood-btn:active { transform: scale(.97); }
.mood-btn.is-active { color: #fff; background: var(--mood); }

.mood-readout {
  width: 100%; min-height: 190px; text-align: center;
  background: linear-gradient(160deg, var(--surface-bright), var(--sc-low));
  border: 1px solid var(--hairline); border-radius: 26px; padding: 34px 28px;
  box-shadow: var(--shadow-lift); position: relative; overflow: hidden; isolation: isolate;
}
.mood-readout::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .6;
  background: radial-gradient(120% 90% at 50% 0, var(--mood-soft), transparent 62%); transition: background .8s var(--ease);
}
.mood-bubble {
  font-family: var(--serif); font-style: italic; font-size: clamp(20px, 3vw, 26px);
  line-height: 1.3; color: var(--ink); transition: opacity .4s var(--ease), transform .4s var(--ease);
}
.mood-tags { display: flex; gap: 9px; justify-content: center; flex-wrap: wrap; margin: 18px 0 12px; min-height: 28px; }
.mood-note { font-size: 13.5px; color: var(--on-surface-variant); }

/* 主动发言 · Section Specifics (3D 旋转木马重构) */
.triggers {
  position: relative; width: 100%; max-width: 900px; margin: 40px auto 0;
  height: 380px; display: flex; align-items: center; justify-content: center;
  perspective: 1000px; transform-style: preserve-3d;
}
.trigger {
  position: absolute; width: 280px; height: 320px; transition: transform 0.6s var(--ease), opacity 0.6s var(--ease), box-shadow 0.6s var(--ease);
  backface-visibility: hidden; cursor: pointer; margin: 0;
}
.trigger.active {
  transform: translate3d(0, 0, 100px) scale(1.05); z-index: 10; opacity: 1;
  box-shadow: var(--shadow-lift); border-color: var(--primary-fixed-dim);
}
.trigger.prev {
  transform: translate3d(-200px, 0, 0) scale(0.88) rotateY(25deg); z-index: 5; opacity: 0.6;
}
.trigger.next {
  transform: translate3d(200px, 0, 0) scale(0.88) rotateY(-25deg); z-index: 5; opacity: 0.6;
}
.trigger.back {
  transform: translate3d(0, 0, -150px) scale(0.7) rotateY(180deg); z-index: 1; opacity: 0;
  pointer-events: none;
}

/* 岁月的痕迹 · 相册 Section Specifics */
.album-container { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(30px, 5vw, 60px); align-items: center; }
.album-media { width: 100%; }

/* 架构流程 · Section Specifics */
.arch-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: 14px; }
.arch-node { background: var(--sc-lowest); border: 1px solid var(--hairline); border-radius: 24px; padding: 32px 28px; box-shadow: var(--shadow-soft); }
.arch-n { font-family: var(--serif); font-size: 14px; color: var(--secondary); letter-spacing: .1em; }
.arch-node h3 { font-family: var(--serif); font-size: 23px; font-weight: 500; color: var(--ink); margin: 8px 0 12px; }
.arch-node p { font-size: 14px; color: var(--on-surface-variant); }
.arch-link {
  align-self: center; width: 40px; height: 2px; position: relative;
  background: repeating-linear-gradient(90deg, var(--primary-fixed-dim) 0 6px, transparent 6px 12px);
}
.arch-link::after {
  content: ""; position: absolute; right: -2px; top: -3px; border-left: 7px solid var(--primary-fixed-dim);
  border-top: 4px solid transparent; border-bottom: 4px solid transparent;
}

/* 架构卡片下方的 GitHub 详情联动栏 */
.arch-github-bar {
  max-width: 680px;
  margin: 54px auto 0;
  background: rgba(21, 66, 18, 0.04);
  border: 1.5px dashed var(--primary-fixed-dim);
  border-radius: 99px;
  padding: 14px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  box-shadow: var(--shadow-soft);
}

.arch-github-text {
  font-size: 13.5px;
  color: var(--on-surface-variant);
  font-family: var(--sans);
  line-height: 1.4;
}

.arch-github-btn {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13.5px;
  padding: 10px 22px;
  border-radius: 99px;
  background: var(--primary);
  color: #fff;
  transition: all 0.3s var(--ease);
  white-space: nowrap;
  box-shadow: var(--shadow-leaf);
  cursor: pointer;
}

.arch-github-btn:hover {
  background: var(--primary-container);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

/* 客户端下载中心 Bento Grid 样式 */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.download-card {
  background: rgba(251, 253, 250, 0.72);
  border: 1px solid var(--hairline);
  border-radius: 26px;
  padding: 36px 30px;
  box-shadow: var(--shadow-soft);
  transition: all 0.4s var(--ease);
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  position: relative;
  overflow: hidden;
}

.download-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lift);
  border-color: var(--primary-fixed-dim);
}

.dl-icon {
  font-size: 38px;
  line-height: 1;
  margin-bottom: 8px;
}

.download-card h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--ink);
  margin: 0;
}

.dl-desc {
  font-size: 13.5px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  flex-grow: 1; /* 让按钮底部对齐 */
  margin-bottom: 18px;
}

.download-card .btn {
  width: 100%;
  padding: 12px 18px;
  font-size: 13.5px;
}

.dl-geek {
  border-style: dashed;
  border-color: var(--outline);
}

/* 手机端架构与下载布局适配 */
@media (max-width: 600px) {
  .arch-github-bar {
    border-radius: 24px;
    flex-direction: column;
    text-align: center;
    padding: 20px;
    gap: 16px;
  }
  .arch-github-btn {
    width: 100%;
  }
}