/* --- 全局变量与重置 --- */
:root {
  --bg-color: #0f1012;
  --card-bg: #1e1f21;
  --text-main: #ffffff;
  --text-grey: #8c8c8c;
  --accent-orange: #d99c68;
  --accent-orange-light: #e6b993;
  --card-border: #333;
  --font-serif: "SimSun", "Songti SC", serif;
  /* 宋体 */
  --font-sans: "DengXian", "Microsoft YaHei", sans-serif;
  /* 等线/无衬线 */
  --font-mono: "Consolas", "Monaco", monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  outline: none;
  user-select: none;
}

a {
  text-decoration: none;
  /* 核心属性：移除下划线 */
  color: inherit;
  /* 可选：继承父元素颜色，避免a标签默认蓝色 */
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* --- 顶部导航 --- */
header {
  height: 60px;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-left .back-btn {
  background: none;
  border: none;
  color: #ccc;
  font-size: 14px;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: color 0.3s ease;
}

.header-left .back-btn:hover {
  color: #ffffff;
}

.logo-area {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}


.logo-sub {
  font-size: 10px;
  color: #fff;
  letter-spacing: 3px;
  margin-top: 2px;
}


.logo-title {
  font-family: var(--font-serif);
  font-size: 18px;
  letter-spacing: 2px;
  margin-left: 320px;
}

.logo-sub {
  font-size: 10px;
  color: var(--text-grey);
  letter-spacing: 3px;
  margin-left: 320px;
}


.nav-menu {
  display: flex;
  gap: 20px;
}

.nav-item {
  font-size: 15px;
  padding: 6px 16px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-grey);
  transition: all 0.3s;
}

.nav-item.active {
  background-color: var(--accent-orange);
  color: #1e1f21;
  font-weight: bold;
}

.nav-item:hover:not(.active) {
  color: var(--text-main);
}

/* --- 标题区 --- */
.hero-text {
  text-align: center;
  margin-top: 20px;
  margin-bottom: 30px;
  flex-shrink: 0;
}

.main-title {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(to right, #d99c68, #ffbd85);
  background-clip: text;
  color: transparent;
  margin-bottom: 12px;
}

.sub-desc {
  font-size: 17px;
  color: #fff;
}

/* --- 主容器 --- */
.main-container {
  flex: 1;
  display: flex;
  padding: 0 60px 40px 60px;
  gap: 40px;
  min-height: 0;
  /* 防止Flex子元素溢出 */
}

/* --- 左侧展示 --- */
.artifact-display {
  flex: 1.5;
  background-color: #000;
  border-radius: 20px;
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background-image: radial-gradient(circle at center, #1a1a1a 0%, #080808 100%);
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.8);
}

.artifact-img-container {
  width: 80%;
  height: 80%;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.bronze-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: filter 0.1s linear;
  position: relative;
  z-index: 1;
}

/* 锈蚀覆盖层 */
.rust-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* 使用混合模式产生铜绿效果 */
  background: radial-gradient(circle, transparent 30%, rgba(61, 114, 94, 0.7) 100%);
  mix-blend-mode: color-burn;
  opacity: 0;
  pointer-events: none;
  z-index: 2;
  transition: opacity 0.1s linear;
}

.texture-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0IiBoZWlnaHQ9IjQiPgo8cmVjdCB3aWR0aD0iNCIgaGVpZ2h0PSI0IiBmaWxsPSIjZmZmIiBmaWxsLW9wYWNpdHk9IjAuMDUiLz4KPC9zdmc+');
  opacity: 0.2;
  pointer-events: none;
  z-index: 3;
}

/* --- 右侧控制板 --- */
.control-panel {
  flex: 0.8;
  display: flex;
  flex-direction: column;
  gap: 15px;
  min-width: 320px;
  overflow-y: auto;
}

.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  border: 1px solid var(--card-border);
}

/* 卡片 1: 时间轴 */
.card-header {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}

.card-header .icon {
  margin-right: 8px;
  font-size: 14px;
}

.card-title {
  font-size: 16px;
  font-weight: bold;
  flex: 1;
}

.card-extra {
  font-size: 15px;
  color: var(--text-grey);
}

.timeline-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.timeline-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  background-color: rgba(255, 255, 255, 0.03);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.timeline-item:hover {
  background-color: rgba(255, 255, 255, 0.06);
}

.timeline-item.active {
  background-color: rgba(217, 156, 104, 0.15);
  border-color: rgba(217, 156, 104, 0.3);
}

.t-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dot {
  font-size: 14px;
  color: var(--text-grey);
}

.timeline-item.active .dot {
  color: var(--accent-orange);
}

.t-name {
  font-size: 16px;
  color: var(--text-grey);
}

.timeline-item.active .t-name {
  color: var(--text-main);
  font-weight: bold;
}

.t-date {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-grey);
}

/* 卡片 2: 环境 */
.env-title {
  font-size: 14px;
  color: var(--text-grey);
  letter-spacing: 1px;
  margin-bottom: 15px;
}

.env-row-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.env-label-group {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
}

.plus {
  color: var(--accent-orange);
  font-size: 33px;
}

/* 开关样式 */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #444;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: .4s;
}

.slider.round {
  border-radius: 20px;
}

.slider.round:before {
  border-radius: 50%;
}

input:checked+.slider {
  background-color: var(--accent-orange);
}

input:checked+.slider:before {
  transform: translateX(16px);
}

.env-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.env-detail-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-grey);
}

.mono-font {
  font-family: var(--font-mono);
}

/* 卡片 3: 控制 */
.control-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-grey);
  margin-bottom: 5px;
}

.progress-display {
  text-align: right;
  margin-bottom: 10px;
}

.accent-text {
  color: var(--accent-orange);
  font-size: 16px;
  font-weight: bold;
}

/* 自定义 Range Slider */
.slider-container {
  position: relative;
  height: 6px;
  background: #333;
  border-radius: 3px;
  margin-bottom: 25px;
}

.rust-slider {
  appearance: none;
  width: 100%;
  height: 6px;
  background: transparent;
  position: relative;
  z-index: 2;
  cursor: pointer;
}

.rust-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  margin-top: 0px;
}

.slider-track-fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background: var(--accent-orange);
  width: 0%;
  border-radius: 3px;
  z-index: 1;
}

.action-buttons {
  display: flex;
  gap: 10px;
}

.btn-simulate {
  flex: 1;
  background-color: var(--accent-orange);
  border: none;
  border-radius: 6px;
  color: #1e1f21;
  font-size: 14px;
  font-weight: bold;
  padding: 12px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn-simulate:hover {
  background-color: var(--accent-orange-light);
}

.btn-download {
  width: 44px;
  background: transparent;
  border: 1px solid #444;
  border-radius: 6px;
  color: var(--text-grey);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-download:hover {
  border-color: var(--text-main);
  color: var(--text-main);
}

/* --- 响应式适配 (移动端: 屏幕宽度小于768px) --- */

@media (max-width: 768px) {

  body {
    height: auto;
    overflow-y: auto;
    overflow-x: hidden;
  }

  header {
    height: auto;
    flex-direction: column;
    /* 改为垂直排列 */
    padding: 15px 15px 10px 15px;
    gap: 15px;
    /* 两行间距 */
    position: relative;
  }

  .header-left {
    position: absolute;
    left: 15px;
    top: 20px;
  }

  .logo-title,
  .logo-sub {
    margin-left: 0;
    text-align: center;
  }

  .nav-menu {
    width: 100%;
    justify-content: center;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 5px;
    /* 给滑动条留一点空间 */
  }

  .nav-item {
    font-size: 12px;
    padding: 6px 10px;
    white-space: nowrap;
    /* 保证文字不换行 */
  }

  .hero-text {
    margin-top: 15px;
    margin-bottom: 20px;
    padding: 0 15px;
  }

  .main-title {
    font-size: 24px;
    margin-bottom: 8px;
  }

  .main-container {
    flex-direction: column;
    padding: 0 15px 40px 15px;
    /* 减小左右边距 */
    gap: 20px;
  }

  /* 上半部分：青铜器展示区 */
  .artifact-display {
    width: 100%;
    height: 350px;

    flex: none;
    border-radius: 16px;
  }

  .artifact-img-container {
    width: 90%;
    height: 90%;
  }

  /* 下半部分：控制面板依次排开 */
  .control-panel {
    width: 100%;
    min-width: 100%;
    flex: none;
    overflow-y: visible;
    /* 取消内部滚动，跟随整个页面滚动 */
  }
}