/* ============================================================================
   投稿站样式

   视觉跟着主站的 assets/site.css 走（深色主题 + 流动光斑 + 磨砂玻璃），
   但这里是「表单工具」而不是「展示页」，所以：
     · 文字更大、间距更松（要长时间盯着填）
     · 交互元素有明显边框和焦点态（键盘可达）
     · 不做花哨动画 —— 除了背景，其余保持克制
   ============================================================================ */

:root {
  --bg: #080b1a;
  --fg: #eef1ff;
  --muted: #8b93b8;
  --ink: #fece0e;
  --warn: #ff6b60;
  --go: #3ddc84;
  --track: rgba(254, 206, 14, .18);
  --card: #141a2e;
  --card-hi: #1e2540;
  --line: rgba(254, 206, 14, .18);
  color-scheme: dark;
}

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

body {
  min-height: 100vh;
  padding: 32px 18px 60px;
  background: var(--bg);
  color: var(--fg);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  line-height: 1.65;
  -webkit-tap-highlight-color: transparent;
}

/* ---------- 背景三层（和主站一致）---------- */
.flow, .frost, body::before { position: fixed; inset: 0; pointer-events: none; }

.flow { z-index: -3; overflow: hidden; }
.flow i { position: absolute; display: block; border-radius: 50%; opacity: .8; }
.flow i:nth-child(1) { width: 58vmax; height: 58vmax; left: -8%;  top: -12%;
  background: rgba(122,152,255,.85); animation: flow1 20s ease-in-out infinite; }
.flow i:nth-child(2) { width: 48vmax; height: 48vmax; right: -10%; top: -8%;
  background: rgba(255,186,122,.78); animation: flow2 25s ease-in-out infinite; }
.flow i:nth-child(3) { width: 52vmax; height: 52vmax; right: -4%; bottom: -16%;
  background: rgba(176,132,255,.76); animation: flow3 22s ease-in-out infinite; }
.flow i:nth-child(4) { width: 44vmax; height: 44vmax; left: -6%; bottom: -14%;
  background: rgba(120,226,200,.70); animation: flow4 28s ease-in-out infinite; }
.flow i:nth-child(5) { width: 38vmax; height: 38vmax; left: 34%; top: 28%;
  background: rgba(255,226,122,.62); animation: flow5 18s ease-in-out infinite; }

.frost {
  z-index: -2;
  background: color-mix(in srgb, var(--bg) 52%, transparent);
  -webkit-backdrop-filter: blur(48px) saturate(160%);
  backdrop-filter: blur(48px) saturate(160%);
}
@supports not (backdrop-filter: blur(2px)) { .frost { background: var(--bg); } }

body::before {
  content: ""; z-index: -1; opacity: .9;
  animation: twinkle 4s ease-in-out infinite;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 18%, #fff, transparent),
    radial-gradient(1.2px 1.2px at 28% 72%, #dfe8ff, transparent),
    radial-gradient(1.8px 1.8px at 44% 12%, #fff, transparent),
    radial-gradient(1.1px 1.1px at 61% 46%, #cfe0ff, transparent),
    radial-gradient(1.5px 1.5px at 78% 24%, #fff, transparent),
    radial-gradient(1.2px 1.2px at 89% 66%, #e6ecff, transparent),
    radial-gradient(1.4px 1.4px at 8% 88%, #fff, transparent),
    radial-gradient(1.1px 1.1px at 68% 86%, #cfe0ff, transparent),
    radial-gradient(1.3px 1.3px at 35% 38%, #fff, transparent),
    radial-gradient(1.7px 1.7px at 95% 8%, #fff, transparent);
}

@keyframes flow1 { 0%,100%{transform:translate3d(0,0,0) scale(1)} 33%{transform:translate3d(16vw,10vh,0) scale(1.18)} 66%{transform:translate3d(6vw,22vh,0) scale(.92)} }
@keyframes flow2 { 0%,100%{transform:translate3d(0,0,0) scale(1.05)} 40%{transform:translate3d(-20vw,16vh,0) scale(.88)} 70%{transform:translate3d(-8vw,30vh,0) scale(1.2)} }
@keyframes flow3 { 0%,100%{transform:translate3d(0,0,0) scale(1)} 35%{transform:translate3d(-18vw,-14vh,0) scale(1.22)} 75%{transform:translate3d(-4vw,-26vh,0) scale(.94)} }
@keyframes flow4 { 0%,100%{transform:translate3d(0,0,0) scale(.95)} 45%{transform:translate3d(22vw,-18vh,0) scale(1.15)} 80%{transform:translate3d(30vw,-4vh,0) scale(1)} }
@keyframes flow5 { 0%,100%{transform:translate3d(0,0,0) scale(1.1)} 50%{transform:translate3d(-14vw,18vh,0) scale(.85)} }
@keyframes twinkle { 0%,100%{opacity:.55} 50%{opacity:.95} }
@keyframes riseIn { from { opacity: 0; transform: translateY(10px); } }

/* ---------- 布局 ---------- */
.wrap { max-width: 760px; margin: 0 auto; }

.head { text-align: center; margin-bottom: 30px; animation: riseIn .4s ease-out; }
.back {
  display: inline-flex; align-items: center; gap: 5px;
  margin-bottom: 18px; padding: 6px 14px 6px 10px; border-radius: 999px;
  background: rgba(20,26,46,.8); border: 1px solid var(--line);
  color: var(--fg); font-size: 13px; font-weight: 600; text-decoration: none;
  transition: background-color .2s, border-color .2s;
}
.back:hover, .back:focus-visible { background: var(--card-hi); border-color: var(--ink); }
.back svg { width: 15px; height: 15px; }

.head h1 { font-size: clamp(24px, 6vw, 34px); font-weight: 800; letter-spacing: .06em; }
.head p { margin-top: 10px; color: var(--muted); font-size: clamp(13px, 3.5vw, 15px); }

/* ---------- 步骤卡片 ---------- */
.step {
  margin-bottom: 18px; padding: 22px 20px;
  border-radius: 18px; background: var(--card);
  border: 1px solid var(--line);
  box-shadow: 0 8px 28px rgba(0,0,0,.35);
  animation: riseIn .4s ease-out;
}
.step[hidden] { display: none; }

.step-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.step-head .num {
  width: 28px; height: 28px; flex: 0 0 auto; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--track); color: var(--ink); font-size: 14px; font-weight: 800;
}
.step-head h2 { font-size: 17px; font-weight: 700; }
.counter { margin-left: auto; font-size: 13px; color: var(--muted); }

.note { color: var(--muted); font-size: 13.5px; line-height: 1.8; }
.note.small { font-size: 12.5px; margin-top: 12px; }
.note a { color: var(--ink); }
.note code {
  padding: 1px 6px; border-radius: 6px; background: var(--track);
  color: var(--ink); font-weight: 700; font-size: 12.5px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 999px; border: 1px solid transparent;
  font: inherit; font-size: 14.5px; font-weight: 700; cursor: pointer;
  transition: background-color .2s, border-color .2s, color .2s, transform .2s, opacity .2s;
}
/* 按钮里的图标必须锁死尺寸。
   漏了这条会出问题：.btn 是 inline-flex，svg 作为 flex item 默认 flex-shrink: 1 ——
   按钮宽度一紧张，浏览器就去压 svg，把它挤成半截。
   （GitHub 那个图标就踩过这个：光在 HTML 上写 width/height 不够，
     flex 布局会无视它去压缩元素。）
   flex: 0 0 auto 明确告诉 flex：别动它。 */
.btn svg { flex: 0 0 auto; width: 18px; height: 18px; display: block; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { margin-top: 16px; background: var(--ink); color: #2a2000; }
.btn.primary:not(:disabled):hover, .btn.primary:not(:disabled):focus-visible {
  transform: translateY(-2px); background: #ffd93d;
}
.btn.ghost {
  background: transparent; color: var(--fg); border-color: rgba(255,255,255,.22);
}
.btn.ghost:hover, .btn.ghost:focus-visible {
  background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.45);
}

.who {
  margin-top: 14px; padding: 10px 14px; border-radius: 12px;
  background: rgba(61,220,132,.12); border: 1px solid rgba(61,220,132,.3);
  display: flex; align-items: center; gap: 10px; font-size: 13.5px;
}
.who img { width: 28px; height: 28px; border-radius: 50%; }
.who b { color: var(--go); }

/* ---------- 学院选择 ---------- */
.picker { margin-top: 4px; }
#collegeSearch {
  width: 100%; padding: 11px 14px; border-radius: 12px;
  background: #0d1224; border: 1px solid var(--line); color: var(--fg);
  font: inherit; font-size: 14.5px;
}
#collegeSearch:focus { outline: none; border-color: var(--ink); }

.colleges {
  margin-top: 12px; max-height: 300px; overflow-y: auto;
  display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  overscroll-behavior: contain;
}
.colleges::-webkit-scrollbar { width: 9px; }
.colleges::-webkit-scrollbar-thumb {
  background: rgba(254,206,14,.3); border-radius: 99px;
  border: 3px solid transparent; background-clip: content-box;
}

.college {
  padding: 10px 12px; border-radius: 11px; cursor: pointer; text-align: left;
  background: #0d1224; border: 1px solid transparent;
  color: var(--fg); font: inherit; font-size: 13.5px; line-height: 1.45;
  transition: background-color .18s, border-color .18s, transform .18s;
}
.college:hover { background: var(--card-hi); transform: translateY(-1px); }
.college[aria-selected="true"] {
  background: var(--track); border-color: var(--ink); color: var(--ink); font-weight: 700;
}
.college[hidden] { display: none; }

.picked {
  margin-top: 14px; padding: 10px 14px; border-radius: 12px;
  background: var(--track); color: var(--ink); font-size: 13.5px; font-weight: 600;
}

/* ---------- 拖放区 ---------- */
.drop {
  margin-top: 4px; padding: 32px 20px; border-radius: 16px;
  border: 2px dashed rgba(254,206,14,.32); background: rgba(13,18,36,.6);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  text-align: center; cursor: pointer;
  transition: border-color .2s, background-color .2s, transform .2s;
}
.drop:hover, .drop:focus-visible {
  border-color: var(--ink); background: rgba(254,206,14,.08); outline: none;
}
.drop.over { border-color: var(--go); background: rgba(61,220,132,.1); transform: scale(1.01); }
.drop svg { width: 34px; height: 34px; color: var(--ink); }
.drop b { font-size: 15px; }
.drop span { font-size: 12.5px; color: var(--muted); line-height: 1.7; }

/* ---------- 文件列表 ---------- */
.files { list-style: none; margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }

.file {
  display: grid; grid-template-columns: 64px 1fr auto; gap: 12px; align-items: center;
  padding: 10px; border-radius: 13px;
  background: #0d1224; border: 1px solid rgba(255,255,255,.06);
}
.file.bad { border-color: rgba(255,107,96,.5); background: rgba(255,107,96,.08); }
.file .thumb {
  width: 64px; height: 64px; border-radius: 9px; object-fit: cover;
  background: #0a0e1c; display: block;
}
.file .meta { min-width: 0; }
.file input[type="text"] {
  width: 100%; padding: 7px 10px; border-radius: 9px;
  background: #080b1a; border: 1px solid var(--line); color: var(--fg);
  font: inherit; font-size: 13.5px;
}
.file input[type="text"]:focus { outline: none; border-color: var(--ink); }
.file .info { margin-top: 6px; font-size: 12px; color: var(--muted); }
.file .info .cut { color: var(--go); }
.file .info .err { color: var(--warn); font-weight: 600; }
.file .rm {
  width: 32px; height: 32px; border-radius: 50%; border: 0; cursor: pointer;
  background: rgba(255,107,96,.14); color: var(--warn);
  display: grid; place-items: center; transition: background-color .2s;
}
.file .rm:hover { background: rgba(255,107,96,.3); }
.file .rm svg { width: 15px; height: 15px; }

.spin {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid rgba(254,206,14,.3); border-top-color: var(--ink);
  animation: spin .7s linear infinite; display: inline-block; vertical-align: -2px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 表单 ---------- */
.field { display: block; margin-top: 4px; }
.field span { display: block; margin-bottom: 7px; font-size: 13.5px; color: var(--muted); }
.field textarea {
  width: 100%; padding: 11px 14px; border-radius: 12px; resize: vertical;
  background: #0d1224; border: 1px solid var(--line); color: var(--fg);
  font: inherit; font-size: 14px; line-height: 1.7;
}
.field textarea:focus { outline: none; border-color: var(--ink); }

.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.actions .btn.primary { margin-top: 0; }

/* ---------- 进度 ---------- */
.log {
  margin-top: 20px; padding: 22px 20px; border-radius: 18px;
  background: var(--card); border: 1px solid var(--line);
  box-shadow: 0 8px 28px rgba(0,0,0,.35);
  animation: riseIn .35s ease-out;
}
.log[hidden] { display: none; }
.log-title { font-size: 16px; font-weight: 700; margin-bottom: 14px; }
.log-title.ok { color: var(--go); }
.log-title.bad { color: var(--warn); }

.log-steps { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.log-steps li {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 13.5px; color: var(--muted); line-height: 1.6;
}
.log-steps li .dot {
  width: 7px; height: 7px; border-radius: 50%; margin-top: 8px; flex: 0 0 auto;
  background: currentColor; opacity: .5;
}
.log-steps li.done { color: var(--fg); }
.log-steps li.done .dot { background: var(--go); opacity: 1; }
.log-steps li.now { color: var(--ink); }
.log-steps li.now .dot { background: var(--ink); opacity: 1; animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: .35; } 50% { opacity: 1; } }

.log-result { margin-top: 16px; font-size: 14px; line-height: 1.8; }
.log-result a { color: var(--ink); font-weight: 700; }
.log-result .err { color: var(--warn); }

.foot { margin-top: 34px; text-align: center; font-size: 12.5px; color: var(--muted); }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--ink); text-decoration: underline; }

/* 只给读屏器的文字 */
.sr {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap;
}

@media (max-width: 560px) {
  body { padding: 20px 12px 44px; }
  .step { padding: 18px 15px; }
  .file { grid-template-columns: 48px 1fr auto; gap: 10px; }
  .file .thumb { width: 48px; height: 48px; }
  .colleges { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .flow i, body::before, .spin, .log-steps li.now .dot { animation: none !important; }
  .step, .head, .log { animation: none; }
  .btn, .college, .drop, .file .rm { transition: none; }
}