/* ========== 基础重置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  width: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  background: #050a12;
  color: #fff;
  -webkit-font-smoothing: antialiased;
}

html { scroll-behavior: smooth; }

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

a {
  text-decoration: none;
  color: inherit;
}

ul { list-style: none; }

img { display: block; max-width: 100%; }

/* ========== 主舞台 ========== */
.stage {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
}

/* 强制关闭视差(覆盖 JS 内联 transform):用于 partner.html / join.html */
.stage.no-parallax .bg-image,
.stage.no-parallax .slogan {
  transform: none !important;
  pointer-events: none;
}

.bg-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 50%;
  /* 让浏览器走最高质量采样，避免缩放糊 */
  image-rendering: -webkit-optimize-contrast;
  image-rendering: high-quality;
  -ms-interpolation-mode: bicubic;
  z-index: 0;
}

.bg-overlay {
  position: absolute;
  inset: 0;
  background:
    /* 仅在边缘轻微压暗，中心保持通透 */
    linear-gradient(180deg, rgba(0,0,0,0.28) 0%, rgba(0,0,0,0.05) 35%, rgba(0,0,0,0.1) 65%, rgba(0,0,0,0.45) 100%);
  z-index: 1;
  pointer-events: none;
}

/* ========== 顶部主导航（3 项） ========== */
.main-nav {
  position: absolute;
  left: 0;
  right: 0;
  /* 紧贴中央口号下方:大字居中(50%)+ 大字半高(~22px) + 24px 间距 */
  top: calc(50% + 46px);
  z-index: 10;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 0 60px;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.nav-item {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 1px;
  position: relative;
  padding: 8px 4px;
  transition: color 0.25s ease, transform 0.25s ease;
}

.nav-item::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: #fff;
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-item:hover { transform: translateY(-1px); }
.nav-item:hover::after,
.nav-item.active::after {
  width: 70%;
}

.nav-item.active {
  color: #fff;
  font-weight: 600;
}

/* ========== 中央口号 ========== */
.hero {
  position: absolute;
  inset: 0;                 /* 占满 stage,大字在 50% 居中(与水面水平线重合) */
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.slogan {
  /* 阶梯式固定像素,所有设备/浏览器看到的字形大小一致 */
  font-size: 40px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: #fff;
  display: flex;
  align-items: center;
  transform: skewX(-12deg) scaleY(1.1);
  font-style: italic;
  text-shadow:
    0 0 1px rgba(255, 255, 255, 0.9),
    0 2px 0 rgba(0, 0, 0, 0.25),
    0 6px 20px rgba(0, 0, 0, 0.35);
  /* 繁体字风格字体栈：优先宋体/明体,搭配苹果/微软繁体黑体,最后回退简体 */
  font-family: "Noto Serif TC", "Source Han Serif TC", "PMingLiU", "MingLiU", "PingFang TC", "Microsoft JhengHei", "Heiti TC", "STHeiti", "PingFang SC", "Microsoft YaHei", serif;
  position: relative;
  animation: sloganIn 1s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.slogan .char {
  display: inline-block;
  position: relative;
  animation: charSlide 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  animation-delay: calc(var(--i) * 0.08s);
}

.slogan .char::before {
  content: "";
  position: absolute;
  left: 100%;
  top: 50%;
  width: 0.18em;
  height: 0.05em;
  background: #fff;
  transform: translateY(-50%);
  opacity: 0.9;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
}

.slogan .char:last-child::before { display: none; }

.slogan::before {
  content: "";
  position: absolute;
  top: -0.16em;
  right: -0.18em;
  width: 0.28em;
  height: 0.16em;
  background: linear-gradient(45deg, transparent 45%, #fff 45%, #fff 55%, transparent 55%);
  transform: skewX(8deg);
  opacity: 0.95;
}

.slogan::after {
  content: "";
  position: absolute;
  bottom: -0.12em;
  left: -0.16em;
  width: 0.24em;
  height: 0.12em;
  background: linear-gradient(45deg, transparent 45%, #fff 45%, #fff 55%, transparent 55%);
  transform: skewX(8deg);
  opacity: 0.95;
}

@keyframes sloganIn {
  0%   { opacity: 0; letter-spacing: 0.4em; filter: blur(8px); }
  100% { opacity: 1; letter-spacing: 0.02em; filter: blur(0); }
}

@keyframes charSlide {
  0%   { opacity: 0; transform: translateX(-30px); }
  100% { opacity: 1; transform: translateX(0); }
}

/* ========== 通用内容区 ========== */
.section {
  position: relative;
  padding: 100px 24px;
  background: #050a12;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 4px;
  color: #fff;
  margin-bottom: 14px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  display: block;
  width: 50px;
  height: 3px;
  margin: 18px auto 0;
  background: linear-gradient(90deg, transparent, #fff, transparent);
}

.section-sub {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 1px;
}

/* ========== 网格 & 卡片 ========== */
.grid {
  display: grid;
  gap: 18px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  aspect-ratio: 4 / 3;
  background: #0e1a2a;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.6);
}

.card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.card:hover img { transform: scale(1.08); }

.card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 16px;
  font-size: 14px;
  color: #fff;
  letter-spacing: 1px;
  background: linear-gradient(0deg, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0) 100%);
}

.card-tall  { aspect-ratio: 3 / 4; }
.card-wide  { aspect-ratio: 16 / 9; grid-column: span 2; }

/* ---- 卡片内部:tag + title 双行结构 ---- */
.card figcaption {
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-tag {
  font-size: 11px;
  letter-spacing: 2px;
  padding: 3px 8px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  color: rgba(255, 255, 255, 0.9);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}
.card-title {
  font-size: 14px;
  letter-spacing: 1px;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

/* ========== 素材库 · 分类切换(tabs) ========== */
.gallery-tabs {
  display: flex;
  justify-content: center;
  gap: 36px;
  margin: -20px 0 48px;
  flex-wrap: wrap;
}

.gallery-tab {
  position: relative;
  background: transparent;
  border: 0;
  padding: 10px 4px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 15px;
  font-family: inherit;
  letter-spacing: 4px;
  cursor: pointer;
  transition: color 0.35s ease;
}
.gallery-tab:hover { color: rgba(255, 255, 255, 0.9); }

.gallery-tab-underline {
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 1px;
  background: #fff;
  transform: translateX(-50%);
  transition: width 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.gallery-tab.is-active { color: #fff; }
.gallery-tab.is-active .gallery-tab-underline { width: 100%; }

/* ========== 切换淡入动画 ========== */
#galleryGrid {
  transition: opacity 0.28s ease;
}
#galleryGrid.is-fading { opacity: 0; }

.gallery-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 15px;
  letter-spacing: 2px;
}

/* ========== 加入回响区块 ========== */
.section-join {
  background: linear-gradient(180deg, #050a12 0%, #08111c 100%);
}

.join-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.join-copy { padding: 10px 0; }

.join-copy .section-title { display: block; text-align: left; }
.join-copy .section-title::after { margin: 18px 0 0; }

.join-copy .section-sub {
  text-align: left;
  font-size: 17px;
  line-height: 1.9;
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.7);
}

.join-points {
  margin: 22px 0 32px;
}

.join-points li {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  padding: 6px 0;
  letter-spacing: 1px;
}

.join-btn {
  display: inline-block;
  padding: 12px 28px;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 999px;
  color: #fff;
  font-size: 15px;
  letter-spacing: 2px;
  transition: all 0.3s ease;
}

.join-btn:hover {
  background: #fff;
  color: #050a12;
  border-color: #fff;
}

.join-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 8px;
}
.join-btn-soft {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  letter-spacing: 2px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.3s;
}
.join-btn-soft:hover {
  border-color: rgba(120, 180, 255, 0.5);
  background: rgba(120, 180, 255, 0.08);
  color: #fff;
}

.join-media {
  position: relative;
  height: 480px;
}

.join-img {
  position: absolute;
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
  object-fit: cover;
}

.join-img-1 {
  width: 60%;
  height: 65%;
  top: 0;
  left: 0;
  z-index: 3;
}

.join-img-2 {
  width: 60%;
  height: 65%;
  bottom: 0;
  right: 0;
  z-index: 1;
}

.join-img-3 {
  width: 55%;
  height: 60%;
  top: 22%;
  left: 24%;
  z-index: 2;
  border: 4px solid #fff;
}

/* ========== 页脚 ========== */
.site-footer {
  background: #03070d;
  padding: 50px 24px 40px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner { text-align: center; }

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 4px;
  color: #fff;
  margin-bottom: 10px;
}

.footer-line {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 3px;
  margin-bottom: 14px;
}

.footer-copy {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 1px;
}

.footer-partner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-partner-line {
  flex: 0 0 50px;
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.footer-partner-text {
  font-size: 11px;
  letter-spacing: 4px;
  color: rgba(255, 255, 255, 0.4);
  font-weight: 500;
}

/* =====================================================
   增强功能样式
   ===================================================== */

/* ---------- 滚动进入视口动画 ----------
   默认可见 — 仅在 html.js 标记 + 显式添加 .reveal-init 类时隐藏。
   隐藏由 JS 主动控制(下一帧移除该类以触发淡入)，
   这样如果 JS 加载失败或 IO 不可用，元素也能正常显示。 */
[data-reveal] {
  opacity: 1;
  transform: none;
  transition: opacity 0.8s ease var(--reveal-delay, 0s),
              transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) var(--reveal-delay, 0s);
}

html.js [data-reveal].reveal-init {
  opacity: 0;
  transform: translateY(28px);
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 浮动顶部导航（滚动后出现） ---------- */
.float-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 14px 36px;
  background: rgba(5, 10, 18, 0.7);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.4s;
}
body.is-scrolled .float-nav {
  transform: translateY(0);
  opacity: 1;
}

.fn-item {
  font-size: 14px;
  letter-spacing: 1.5px;
  color: rgba(255, 255, 255, 0.7);
  padding: 6px 0;
  position: relative;
  transition: color 0.25s;
}
.fn-item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: #fff;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s;
}
.fn-item:hover { color: #fff; }
.fn-item:hover::after { transform: scaleX(1); }

.fn-brand {
  margin-left: auto;
  font-size: 13px;
  letter-spacing: 4px;
  color: rgba(255, 255, 255, 0.45);
  font-weight: 500;
}

/* ---------- 返回顶部按钮 ---------- */
.to-top {
  position: fixed;
  right: 32px;
  bottom: 32px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 0.35s, transform 0.35s, background 0.25s;
}
.to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.to-top:hover { background: rgba(255, 255, 255, 0.2); }

/* ---------- Lightbox 大图查看 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.lightbox.is-open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox figure {
  max-width: min(90vw, 1400px);
  max-height: 86vh;
  text-align: center;
  position: relative;
}
.lightbox-img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transform: scale(0.96);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lightbox.is-open .lightbox-img { transform: scale(1); }
.lightbox-cap {
  margin-top: 16px;
  font-size: 14px;
  letter-spacing: 4px;
  color: rgba(255, 255, 255, 0.7);
}
.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  color: #fff;
  font-size: 36px;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  transition: background 0.25s, transform 0.25s;
  line-height: 1;
  font-weight: 300;
}
.lightbox-close { top: 24px; right: 24px; font-size: 28px; }
.lightbox-prev  { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox-next  { right: 24px; top: 50%; transform: translateY(-50%); }
.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255, 255, 255, 0.2);
}
.lightbox-prev:hover { transform: translateY(-50%) translateX(-4px); }
.lightbox-next:hover { transform: translateY(-50%) translateX(4px); }

/* ---------- Modal 通用 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.modal.is-open {
  opacity: 1;
  pointer-events: auto;
}
.modal-card {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  background: linear-gradient(180deg, #0e1622 0%, #08111c 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 40px 36px 32px;
  transform: translateY(20px) scale(0.98);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}
.modal.is-open .modal-card {
  transform: translateY(0) scale(1);
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  font-size: 22px;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s, color 0.2s;
}
.modal-close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}
.modal-title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 4px;
  margin-bottom: 8px;
  background: linear-gradient(120deg, #fff 0%, #c8d4e6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.modal-sub {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 24px;
  letter-spacing: 1px;
}

/* ---------- Modal：表单 ---------- */
.modal-card form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.modal-card label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.modal-card label > span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 1px;
}
.modal-card input,
.modal-card select,
.modal-card textarea {
  width: 100%;
  padding: 11px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.25s, background 0.25s;
  resize: vertical;
}
.modal-card input:focus,
.modal-card select:focus,
.modal-card textarea:focus {
  border-color: rgba(120, 180, 255, 0.5);
  background: rgba(255, 255, 255, 0.06);
}
.modal-card select option { background: #0e1622; }
.modal-submit {
  margin-top: 8px;
  padding: 12px 0;
  background: linear-gradient(120deg, #4f7cff 0%, #6e5cff 100%);
  color: #fff;
  font-size: 14px;
  letter-spacing: 4px;
  border-radius: 8px;
  font-weight: 500;
  transition: transform 0.2s, box-shadow 0.25s;
}
.modal-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(79, 124, 255, 0.35);
}

/* ---------- Modal：帮助列表 ---------- */
.help-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.help-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
}
.help-list li:last-child { border-bottom: none; }
.help-label {
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 1px;
}
.help-value {
  color: #fff;
  font-weight: 500;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
}

/* ---------- 复制按钮 ---------- */
.btn-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  margin-left: 8px;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: background 0.2s, color 0.2s, transform 0.2s;
}
.btn-copy:hover {
  background: rgba(120, 180, 255, 0.2);
  color: #fff;
  transform: scale(1.1);
}
.btn-copy.is-copied {
  background: rgba(120, 220, 160, 0.2);
  color: #b0f0c8;
}

/* ---------- 申请进度查询 ---------- */
.track-form { display: flex; flex-direction: column; gap: 14px; margin-top: 4px; }
.track-form .modal-submit { margin-top: 4px; }
.track-result {
  margin-top: 18px;
  padding: 20px 16px 18px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  animation: stepIn 0.4s;
}
.track-status {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  position: relative;
  margin-bottom: 18px;
  padding: 0 8px;
}
.track-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 1px;
  position: relative;
  z-index: 2;
}
.track-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.5);
}
.track-line {
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
  margin: 14px 8px 0;
}
.track-stage.is-done .track-dot {
  background: linear-gradient(120deg, #4f7cff, #6e5cff);
  border-color: transparent;
  color: #fff;
}
.track-stage.is-current .track-dot {
  background: rgba(79, 124, 255, 0.25);
  border-color: #4f7cff;
  color: #fff;
  box-shadow: 0 0 0 4px rgba(79, 124, 255, 0.15);
  animation: pulse 1.6s ease-in-out infinite;
}
.track-stage.is-current { color: #fff; }
.track-stage.is-done { color: rgba(255, 255, 255, 0.85); }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(79, 124, 255, 0.45); }
  50%      { box-shadow: 0 0 0 8px rgba(79, 124, 255, 0); }
}
@keyframes stepIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.track-meta {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  text-align: center;
  letter-spacing: 0.5px;
}
.track-meta strong { color: #fff; padding: 0 2px; }
.track-ticket {
  margin-top: 8px;
  text-align: center;
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 1px;
}
.track-ticket code {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 12px;
  margin-left: 4px;
}

/* ---------- Toast 轻提示 ---------- */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 1100;
  max-width: 90vw;
  padding: 12px 22px;
  background: rgba(15, 25, 40, 0.95);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  color: #fff;
  font-size: 14px;
  letter-spacing: 1px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}
.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast-ok   { border-color: rgba(120, 220, 160, 0.4); }
.toast-warn { border-color: rgba(255, 180, 80, 0.5); }

/* ---------- 响应式 — 移动端（恢复浏览器模拟样式 + 增强组件） ========== */
@media (max-width: 767px) {
  .float-nav { padding: 12px 18px; gap: 18px; }
  .fn-item { font-size: 12px; letter-spacing: 0; }
  .fn-brand { font-size: 11px; letter-spacing: 2px; }

  .to-top { right: 16px; bottom: 76px; width: 42px; height: 42px; }

  /* 移动端:tabs 横向滚动 + 卡片双行 */
  .gallery-tabs {
    gap: 18px;
    margin: -20px -24px 36px;
    padding: 0 24px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
    justify-content: flex-start;
    scrollbar-width: none;
  }
  .gallery-tabs::-webkit-scrollbar { display: none; }
  .gallery-tab { font-size: 13px; letter-spacing: 2px; flex-shrink: 0; }

  .grid-3 { grid-template-columns: 1fr 1fr; gap: 10px; }
  .card-wide { grid-column: span 2; }

  .lightbox { padding: 16px; }
  .lightbox-close { top: 12px; right: 12px; }
  .lightbox-prev, .lightbox-next { width: 44px; height: 44px; font-size: 28px; }
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }

  .modal-card { padding: 30px 22px 24px; }
  .modal-title { font-size: 20px; letter-spacing: 2px; }

  .track-stage { font-size: 10px; gap: 6px; }
  .track-dot { width: 24px; height: 24px; font-size: 12px; }
  .track-line { margin: 12px 4px 0; }

  .join-actions { gap: 8px; }
  .join-btn-soft { padding: 10px 16px; font-size: 12px; }

  .toast { bottom: 80px; font-size: 13px; padding: 10px 16px; }

  .stage {
    height: 100vh;
    min-height: 420px;
  }

  .main-nav {
    padding: 14px 18px 18px;
    justify-content: space-between;
  }

  .nav-item { font-size: 13px; letter-spacing: 0; }

  .slogan { font-size: 40px; }

  /* 移动端隐藏底部页脚(节省屏幕空间)，但保留 .section 让用户能继续向下浏览 */
  .site-footer { display: none; }
}

/* ========== 响应式 ========== */
/* 平板 768-1199：slogan 中等大小 */
@media (min-width: 768px) and (max-width: 1199px) {
  .slogan { font-size: 48px; }
}

/* 桌面端 ≥1200：slogan 较大 */
@media (min-width: 1200px) {
  .slogan { font-size: 56px; }
  .join-media { height: 540px; }
}

@media (max-width: 900px) {
  .join-grid { grid-template-columns: 1fr; gap: 30px; }
  .join-media { height: 360px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .card-wide { grid-column: span 2; }
  .section { padding: 70px 18px; }
  .section-title { font-size: 30px; }
}