/* ==========================================================================
   TearLeaf · tearleaf.top
   配色：深蓝 → 浅蓝渐变 + 白色，简约。
   ========================================================================== */

:root {
  --navy-900: #04122a;
  --navy-800: #071f43;
  --navy-700: #0c3468;
  --blue-500: #2b74ee;
  --blue-400: #4f97ff;
  --blue-300: #8ec2ff;
  --blue-200: #c2ddff;
  --blue-100: #e9f2ff;
  --white: #ffffff;
  --ink: #0c3468;
  --ink-soft: #5d7ba6;
  --radius-lg: 22px;
  --radius-md: 16px;
  --shadow-card: 0 18px 40px rgba(5, 22, 51, .16);
  --shadow-soft: 0 8px 22px rgba(5, 22, 51, .10);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --page-max: 1000px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100%;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI",
               system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background: var(--white);
}

/* 深蓝 → 浅蓝 → 白的整页渐变（固定在视口上，滚动时不会拉长变形） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    168deg,
    var(--navy-900) 0%,
    var(--navy-700) 22%,
    var(--blue-500) 52%,
    var(--blue-300) 74%,
    var(--blue-100) 88%,
    var(--white) 100%
  );
  background-size: 100% 100%;
}

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

/* ---------------------------------------------------------------- 页面骨架 */

.site-main {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(20px, 4vw, 40px) clamp(16px, 4vw, 40px) clamp(48px, 8vw, 88px);
}

/* ---------------------------------------------------------------- 分区切换条 */

.tabs-wrap {
  position: sticky;
  top: 10px;
  z-index: 20;
  text-align: center;
  padding: 2px 0 clamp(16px, 3vw, 26px);
}

.tabs {
  display: inline-flex;
  gap: 8px;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 7px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .26);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px rgba(4, 18, 42, .16);
}
.tabs::-webkit-scrollbar { display: none; }

.tab {
  white-space: nowrap;
  border: 0;
  cursor: pointer;
  font: inherit;
  font-size: 14.5px;
  font-weight: 600;
  color: rgba(255, 255, 255, .92);
  background: transparent;
  padding: 9px 24px;
  border-radius: 999px;
  transition: background .24s var(--ease), color .24s var(--ease);
}
.tab:hover { background: rgba(255, 255, 255, .18); }
.tab:focus-visible { outline: 2px solid var(--white); outline-offset: 2px; }

.tab[aria-selected="true"] {
  background: var(--white);
  color: var(--navy-700);
  box-shadow: 0 6px 18px rgba(4, 18, 42, .22);
}

.tab .tab-count {
  margin-left: 7px;
  font-size: 11.5px;
  font-weight: 600;
  opacity: .62;
}

/* ---------------------------------------------------------------- 分区切换动画 */

.view { transition: opacity .28s var(--ease), transform .28s var(--ease); }
.view.is-switching { opacity: 0; transform: translateY(10px); }

/* ---------------------------------------------------------------- 分区头图 */

.section-hero {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 164px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(18px, 3vw, 28px);
  color: var(--white);
  background: linear-gradient(140deg, var(--blue-500), var(--blue-200));
  box-shadow: var(--shadow-card);
}
.section-hero.has-cover {
  background-image:
    linear-gradient(150deg, rgba(4, 18, 42, .34) 0%, rgba(4, 18, 42, .66) 62%, rgba(4, 18, 42, .86) 100%),
    var(--cover);
  background-size: cover, cover;
  background-position: center, var(--cover-pos, center);
  background-repeat: no-repeat, no-repeat;
}
.section-hero h2 {
  margin: 0;
  font-size: clamp(23px, 4.2vw, 32px);
  font-weight: 800;
  letter-spacing: .6px;
  text-shadow: 0 8px 26px rgba(3, 16, 38, .4);
}
.section-hero p {
  margin: 8px 0 0;
  max-width: 60ch;
  font-size: 14px;
  color: rgba(255, 255, 255, .88);
}

/* ---------------------------------------------------------------- 内容面板 */

.panel {
  margin-top: clamp(16px, 2.6vw, 22px);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: clamp(22px, 4vw, 36px);
}

/* 分区介绍文字（首页用这个） */
.intro { max-width: 66ch; }
.intro p { margin: 0 0 1em; font-size: 15.5px; color: var(--navy-700); }
.intro p:last-child { margin-bottom: 0; }
.intro h3 { margin: 1.5em 0 .5em; font-size: 17px; }
.intro h3:first-child { margin-top: 0; }
.intro ul { margin: 0 0 1em; padding-left: 1.3em; }
.intro li { margin: .3em 0; font-size: 15px; color: var(--navy-700); }
.intro a { color: var(--blue-500); }
.intro a:hover { text-decoration: underline; }

/* 分区里还没内容时的占位 */
.empty-state { text-align: center; padding: clamp(8px, 2.6vw, 22px) 0; }
.empty-state .empty-mark {
  width: 54px;
  height: 54px;
  margin: 0 auto 14px;
  border-radius: 17px;
  display: grid;
  place-items: center;
  background: var(--blue-100);
  color: var(--blue-500);
}
.empty-state .empty-mark svg { width: 26px; height: 26px; }
.empty-state h3 { margin: 0 0 6px; font-size: 17px; color: var(--navy-700); }
.empty-state p { margin: 0; font-size: 13.5px; color: var(--ink-soft); }

/* 分区里有条目时的卡片网格（现在还没有条目，样式先备着） */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: clamp(12px, 2vw, 18px);
}

.item-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(43, 116, 238, .16);
  background: linear-gradient(140deg, var(--blue-100), var(--white));
  transition: transform .26s var(--ease), box-shadow .26s var(--ease);
}
a.item-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-soft); }
.item-body { flex: 1 1 auto; min-width: 0; }
.item-title { margin: 0; font-size: 15.5px; font-weight: 700; color: var(--navy-700); }
.item-desc { margin: 4px 0 0; font-size: 13px; color: var(--ink-soft); }
.item-more { color: var(--blue-500); display: inline-flex; }
.item-more svg { width: 16px; height: 16px; }

/* ---------------------------------------------------------------- 模组卡片（下载 / 备用下载 / 赞助） */

.mod-list { display: grid; gap: clamp(14px, 2.4vw, 20px); }

.mod-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: clamp(20px, 3.4vw, 32px);
}

.mod-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: 10px; }
.mod-name { margin: 0; font-size: clamp(19px, 3vw, 23px); font-weight: 800; color: var(--navy-700); letter-spacing: .3px; }
.mod-version {
  font-size: 12px; font-weight: 700; color: var(--blue-500);
  background: rgba(43, 116, 238, .1); border-radius: 999px; padding: 3px 10px;
}
.mod-desc { margin: 10px 0 0; font-size: 14.5px; color: var(--navy-700); max-width: 62ch; }
.mod-note { margin: 7px 0 0; font-size: 13px; color: var(--ink-soft); max-width: 62ch; }

.mod-actions { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 10px; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: inherit; font-size: 14.5px; font-weight: 600; line-height: 1;
  padding: 12px 22px; border-radius: 999px;
  border: 1px solid transparent;
  transition: transform .24s var(--ease), box-shadow .24s var(--ease),
              background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}
.btn svg { width: 17px; height: 17px; flex: 0 0 auto; }

.btn-primary {
  background-image: linear-gradient(135deg, var(--blue-500), var(--blue-400));
  color: var(--white);
  box-shadow: 0 10px 24px rgba(43, 116, 238, .3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(43, 116, 238, .38); }
.btn-primary:focus-visible { outline: 2px solid var(--navy-700); outline-offset: 2px; }

.btn-secondary {
  background: var(--white); color: var(--navy-700);
  border-color: rgba(43, 116, 238, .28);
}
.btn-secondary:hover { background: var(--blue-100); border-color: var(--blue-500); color: var(--blue-500); }
.btn-secondary:focus-visible { outline: 2px solid var(--blue-500); outline-offset: 2px; }

.btn-ghost {
  background: linear-gradient(140deg, var(--blue-100), var(--white));
  color: var(--navy-700); border-color: rgba(43, 116, 238, .2);
}
.btn-ghost:hover { border-color: var(--blue-500); color: var(--blue-500); transform: translateY(-2px); }

/* 文件还没上传时：按钮显示为不可点，并明确标注 */
.btn.is-disabled {
  background-image: none;
  background: var(--blue-100);
  color: var(--ink-soft);
  box-shadow: none;
  cursor: not-allowed;
}
.btn-tag {
  font-size: 11px; font-style: normal; font-weight: 700;
  padding: 3px 8px; border-radius: 999px;
  background: rgba(12, 52, 104, .08); color: var(--ink-soft);
}

/* 备用下载 */
.mod-fallback { margin-top: 20px; padding-top: 16px; border-top: 1px dashed rgba(43, 116, 238, .22); }
.fallback-note { margin: 0 0 12px; font-size: 13.5px; color: var(--ink-soft); }
.fallback-note.is-active { color: var(--navy-700); font-weight: 600; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

/* 赞助 */
.mod-sponsor { margin-top: 20px; padding-top: 16px; border-top: 1px dashed rgba(43, 116, 238, .22); }
.sponsor-text { margin: 0 0 12px; font-size: 13.5px; color: var(--ink-soft); }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 640px) {
  .tabs { display: flex; width: 100%; border-radius: var(--radius-md); }
  .tab { flex: 1 1 auto; padding: 9px 14px; }
  .grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .001ms !important; animation-duration: .001ms !important; }
  .view.is-switching { transform: none; }
}