/* ===== 现代渐变极简 · 黑白双色 · 左右分栏落地页布局 ===== */

:root {
  /* 阳光模式（默认） */
  --bg: #f4f4f4;
  --bg-glow: #ffffff;
  --card: rgba(255, 255, 255, 0.75);
  --card-border: rgba(0, 0, 0, 0.08);
  --heading: #111111;
  --text: #3d3d3d;
  --muted: #777777;
  --line: rgba(0, 0, 0, 0.1);
  --box: rgba(0, 0, 0, 0.045);
  --accent: #111111;
  --cta-grad: linear-gradient(145deg, #2a2a2a, #000000);
  --cta-text: #ffffff;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  --nav-bg: rgba(244, 244, 244, 0.7);
  --dot: rgba(0, 0, 0, 0.10);
  --aurora-a: rgba(110, 110, 110, 0.35);
  --aurora-b: rgba(255, 255, 255, 0.9);
  --aurora-c: rgba(170, 170, 170, 0.40);
  --card-solid: #fafafa;
}

html[data-theme="dark"] {
  --bg: #0d0d0d;
  --bg-glow: #2a2a2a;
  --card: rgba(26, 26, 26, 0.65);
  --card-border: rgba(255, 255, 255, 0.12);
  --heading: #f5f5f5;
  --text: #cfcfcf;
  --muted: #949494;
  --line: rgba(255, 255, 255, 0.12);
  --box: rgba(255, 255, 255, 0.07);
  --accent: #ffffff;
  --cta-grad: linear-gradient(145deg, #ffffff, #d9d9d9);
  --cta-text: #0d0d0d;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(13, 13, 13, 0.65);
  --dot: rgba(255, 255, 255, 0.08);
  --aurora-a: rgba(255, 255, 255, 0.14);
  --aurora-b: rgba(255, 255, 255, 0.10);
  --aurora-c: rgba(255, 255, 255, 0.08);
  --card-solid: #1a1a1a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  font-size: 100%;
  color: var(--text);
  transition: color 0.35s;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== 背景：点阵网格（底层）+ 流光极光（上层） ===== */
body {
  background-color: var(--bg);
  transition: background-color 0.35s;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image: radial-gradient(var(--dot) 1px, transparent 1.5px);
  background-size: 26px 26px;
}

/* 两团大幅漂移的光晕 */
.glow {
  position: fixed;
  z-index: -1;
  width: 55vw;
  height: 55vw;
  max-width: 900px;
  max-height: 900px;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(70px);
}
.glow-1 {
  top: -15%;
  left: -10%;
  background: radial-gradient(circle, var(--aurora-a), transparent 65%);
  animation: glow-move-1 22s ease-in-out infinite alternate;
}
.glow-2 {
  bottom: -20%;
  right: -12%;
  background: radial-gradient(circle, var(--aurora-b), transparent 65%);
  animation: glow-move-2 28s ease-in-out infinite alternate;
}
@keyframes glow-move-1 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(18vw, 10vh) scale(1.25); }
}
@keyframes glow-move-2 {
  from { transform: translate(0, 0) scale(1.15); }
  to   { transform: translate(-15vw, -12vh) scale(0.95); }
}

/* ===== 开场黑幕 ===== */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 2000;
  animation: overlay-fade 1.4s ease-out forwards;
  pointer-events: none;
}
@keyframes overlay-fade {
  0%   { opacity: 1; }
  99%  { opacity: 0.01; }
  100% { opacity: 0; pointer-events: none; }
}

/* ===== 顶部导航 ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1060px;
  margin: 0 auto;
  padding: 12px 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05em;
  color: var(--heading);
  letter-spacing: 0.02em;
}
.brand-logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
}
#themeToggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--card-border);
  background: var(--card);
  color: var(--heading);
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.2s;
  display: grid;
  place-items: center;
}
#themeToggle:hover { transform: rotate(15deg) scale(1.06); }

/* ===== 主内容：左右分栏 ===== */
.page {
  flex: 1;
  width: 100%;
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 28px;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  align-items: center;
  gap: 56px;
  padding: 72px 0 64px;
}

/* 左栏 */
.hero-left {
  animation: hero-in 0.7s cubic-bezier(0.4, 0, 0.2, 1) 0.35s both;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85em;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.18em;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.hero-title {
  margin-top: 18px;
  font-size: clamp(1.8em, 4vw, 2.5em);
  font-weight: 800;
  color: var(--heading);
  line-height: 1.22;
  letter-spacing: 0.01em;
}
.hero-sub {
  margin-top: 14px;
  font-size: 1em;
  color: var(--muted);
  line-height: 1.7;
}

/* 操作行：优惠码 + CTA 并排 */
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}
.coupon-btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  font: inherit;
  font-size: 0.98em;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--heading);
  background: transparent;
  border: 1.5px dashed var(--muted);
  border-radius: 999px;
  padding: 12px 24px;
  min-width: 176px;
  justify-content: center;
  cursor: pointer;
  outline: none;
  transition: transform 0.2s, border-color 0.2s;
}
.coupon-btn:hover { transform: translateY(-2px); border-color: var(--accent); }
.coupon-btn:active { transform: translateY(0); }
.coupon-btn .shine {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(128, 128, 128, 0.3), transparent);
  transform: skewX(-25deg);
  opacity: 0;
  pointer-events: none;
}
.coupon-btn:hover .shine { animation: shine 0.7s ease 0.05s; }
@keyframes shine {
  0%   { left: -50%; width: 150%; opacity: 0.5; }
  100% { left: 100%; width: 150%; opacity: 0; }
}
/* 复制成功动画：柔和涟漪 + 文字淡入 */
.coupon-btn.copied {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--box);
}
.coupon-btn.copied .coupon-label {
  animation: label-fade-in 0.35s ease both;
}
@keyframes label-fade-in {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}
.coupon-btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(128, 128, 128, 0.25);
  transform: scale(0);
  opacity: 0.5;
  animation: ripple-expand 0.6s ease-out forwards;
  pointer-events: none;
}
@keyframes ripple-expand {
  to { transform: scale(1); opacity: 0; }
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  border: none;
  border-radius: 999px;
  background: var(--cta-grad);
  color: var(--cta-text);
  font-size: 0.98em;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
  transition: transform 0.15s, box-shadow 0.15s, filter 0.25s;
}
.cta-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.12);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.3);
}
.cta-btn:active { transform: translateY(0); }

/* 右栏：卡片列 */
.hero-right {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  animation: hero-in 0.7s cubic-bezier(0.4, 0, 0.2, 1) 0.5s both;
}
/* 卡片列背后的柔光装饰 */
.hero-right::before {
  content: "";
  position: absolute;
  inset: -12% -10%;
  background: radial-gradient(ellipse 70% 60% at 50% 50%, var(--bg-glow), transparent 70%);
  z-index: -1;
  filter: blur(6px);
}
.benefit-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.2s;
}
.benefit-card:hover { transform: translateX(4px); }
.num {
  font-size: 1.25em;
  font-weight: 800;
  color: var(--muted);
  opacity: 0.55;
  letter-spacing: 0.02em;
}
.benefit-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1.45;
}
.benefit-text strong {
  font-size: 1em;
  color: var(--heading);
}
.benefit-text span {
  font-size: 0.85em;
  color: var(--muted);
}

/* 技术帮助群悬浮提示群号 */
.qq-tip {
  position: relative;
  cursor: pointer;
  border-bottom: 1px dashed var(--muted);
}
.qq-tip::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--heading);
  color: var(--bg);
  font-size: 0.85em;
  font-weight: 600;
  white-space: nowrap;
  padding: 5px 12px;
  border-radius: 8px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 20;
}
.qq-tip::before {
  content: "";
  position: absolute;
  bottom: calc(100% + 3px);
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--heading);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s;
  z-index: 20;
}
.qq-tip:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.qq-tip:hover::before { opacity: 1; visibility: visible; }

/* 02卡片：悬浮显示群号，点击复制（复用 qq-tip 气泡，覆盖文字样式） */
.benefit-card.qq-tip {
  font-weight: 400;
  border-bottom: 1px solid var(--card-border);
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s;
}
.benefit-card.qq-tip.copied {
  border-color: var(--accent);
}
.benefit-card.qq-tip.copied::after {
  content: "已复制 1035873586 ✓";
}

/* 提示框 */
.guidance-box {
  font-size: 0.88em;
  color: var(--muted);
  line-height: 1.65;
  background: var(--box);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 12px 16px;
}
.guidance-box strong { color: var(--heading); }

/* ===== 页脚 ===== */
.page-footer {
  text-align: center;
  padding: 20px 0 28px;
  font-size: 0.8em;
  color: var(--muted);
}
.footer-link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.footer-link:hover { border-bottom-color: var(--accent); }

/* ===== 响应式：移动端单栏 ===== */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 36px;
    min-height: 0;
    padding: 48px 0 30px;
  }
  .topbar, .page { padding-left: 20px; padding-right: 20px; }
  .hero-right::before { display: none; }
  .actions { gap: 12px; }
}

/* ===== 网盘资源页 ===== */
.pan-page {
  max-width: 1060px;
  padding-top: 24px;
}
.pan-hero {
  text-align: center;
  padding: 28px 0 8px;
  animation: hero-in 0.7s cubic-bezier(0.4, 0, 0.2, 1) 0.35s both;
}
.pan-title {
  font-size: clamp(1.6em, 3.5vw, 2.1em);
  font-weight: 800;
  color: var(--heading);
  letter-spacing: 0.02em;
}
.pan-sub {
  margin-top: 10px;
  font-size: 0.95em;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.pan-tools {
  display: flex;
  justify-content: center;
  margin: 28px 0 30px;
}
.search-input {
  width: 100%;
  max-width: 440px;
  padding: 12px 20px;
  font: inherit;
  color: var(--heading);
  background: var(--card);
  border: 1.5px solid var(--card-border);
  border-radius: 999px;
  outline: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--box);
}

/* 搜索加载动画 */
.pan-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.9em;
  padding: 8px 0 18px;
}
/* display:flex 会盖过 hidden 的默认隐藏，需显式恢复 */
.pan-loading[hidden] { display: none; }
.spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid var(--card-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.pan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  padding-bottom: 20px;
}
.pan-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 20px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.2s, z-index 0s linear 0.25s;
  animation: card-in 0.4s ease backwards;
}
.pan-card:hover { transform: translateY(-3px); }
/* 悬浮/聚焦时抬升整卡层级，保证浮层盖住相邻卡片；
   z-index 延迟 0.25s 再降级，等浮层淡出完，避免中途被盖 */
.pan-card:hover,
.pan-card:focus-within {
  z-index: 40;
  transition-delay: 0s, 0s;
}
@keyframes card-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
/* 底部信息行：大小+日期在左，分享按钮在右 */
.pan-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}
.pan-meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.82em;
  color: var(--muted);
}
.pan-date { font-size: 1em; color: var(--muted); }
.share-card-btn {
  font: inherit;
  font-size: 0.9em;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: none;
  border-radius: 6px;
  padding: 3px 6px;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}
.share-card-btn:hover {
  color: var(--accent);
  background: var(--box);
}
.pan-name {
  font-size: 1.02em;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.4;
}
/* 多网盘链接列表：悬浮后以浮层展开，覆盖在下方内容上，不挤动页面布局 */
/* 资源封面图：负边距抵消卡片内边距，图片铺满卡片上缘，无缝隙 */
.pan-card-img {
  margin: -18px -20px 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--card-border);
  border-radius: 15px 15px 0 0;
}
.pan-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.pan-card { position: relative; }
/* 浮层顶部盖住卡片底部圆角区域（16px 圆角 + 1px 边框），
   卡片圆角始终保持不变，展开/收起只动浮层，衔接处不会裂开 */
.link-list {
  position: absolute;
  top: calc(100% - 17px);
  left: -1px;
  right: -1px;
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--card-solid);
  border: 1px solid var(--card-border);
  border-top: none;
  border-radius: 0 0 16px 16px;
  padding: 24px 14px 12px;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s;
}
.pan-card:hover .link-list,
.pan-card:focus-within .link-list {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
/* 触屏设备没有悬浮：浮层改为常规排列直接显示 */
@media (hover: none) {
  .link-list {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 6px 0 0;
  }
}
.link-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--box);
  border-radius: 10px;
  padding: 8px 12px;
}
.link-pan {
  font-size: 0.85em;
  font-weight: 600;
  color: var(--heading);
}
.link-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.pan-code {
  font: inherit;
  font-size: 0.85em;
  font-weight: 600;
  color: var(--heading);
  background: var(--box);
  border: 1.5px dashed var(--muted);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.pan-code:hover { border-color: var(--accent); color: var(--accent); }
.pan-link {
  font-size: 0.9em;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.pan-link:hover { border-bottom-color: var(--accent); }
.pan-empty {
  text-align: center;
  color: var(--muted);
  padding: 30px 0 60px;
}

/* 复制成功 toast */
.copy-toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translate(-50%, 16px);
  background: var(--heading);
  color: var(--bg);
  font-size: 0.85em;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 500;
}
.copy-toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

@keyframes hero-in {
  0%   { opacity: 0; transform: translateY(22px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* ===== 雨云服务器介绍区：左图右文 ===== */
.server-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  align-items: stretch;
  margin: 0 0 72px;
  animation: hero-in 0.5s ease backwards;
  animation-delay: 0.35s;
}
.server-img {
  display: grid;
  border: 1px solid var(--card-border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow);
  min-height: 260px;
}
.server-img img {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  display: block;
}
.server-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  padding: 26px 28px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.server-panel h2 {
  margin: 0;
  font-size: 1.35em;
  font-weight: 800;
  color: var(--heading);
  letter-spacing: 0.02em;
}
.server-panel p {
  margin: 0;
  font-size: 0.95em;
  line-height: 1.7;
  color: var(--muted);
}
.server-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.server-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9em;
  line-height: 1.6;
  color: var(--text, inherit);
}
.server-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.85em;
}
.server-link {
  align-self: flex-start;
  margin-top: 4px;
  font-size: 0.92em;
  font-weight: 700;
  color: var(--heading);
  text-decoration: none;
  border-bottom: 1.5px solid var(--accent);
  padding-bottom: 2px;
  transition: opacity 0.2s;
}
.server-link:hover { opacity: 0.7; }

@media (max-width: 760px) {
  .server-section {
    grid-template-columns: 1fr;
  }
  .server-img { min-height: 200px; }
}

/* ===== 图片加载动画：加载中流光骨架，完成后淡入 ===== */
img.img-loading {
  opacity: 0;
  background-color: var(--box);
  background-image: linear-gradient(100deg,
    transparent 30%,
    var(--card-border) 50%,
    transparent 70%);
  background-size: 200% 100%;
  animation: img-shimmer 1.2s linear infinite;
}
img.img-loaded {
  opacity: 1;
  transition: opacity 0.45s ease;
}
@keyframes img-shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}