/* ============================================
   LW 论文接单平台 — 全局样式
   ============================================ */
:root {
  --primary: #4358e8;
  --primary-dark: #3347c9;
  --primary-light: #eef0fd;
  --accent: #f59e0b;
  --success: #16a34a;
  --success-bg: #e9f9ef;
  --danger: #e5484d;
  --danger-bg: #fdeeee;
  --info: #0ea5e9;
  --info-bg: #eaf6fe;
  --warning: #d97706;
  --warning-bg: #fdf3e3;
  --bg: #f3f5fb;
  --card: #ffffff;
  --text: #1c2333;
  --text-2: #6b7280;
  --text-3: #9aa3b2;
  --border: #e5e9f2;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(20, 24, 40, .06), 0 4px 16px rgba(20, 24, 40, .05);
  --shadow-lg: 0 8px 30px rgba(20, 24, 40, .12);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14.5px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--primary); text-decoration: none; }
a:hover { opacity: .85; }
img { max-width: 100%; }
.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 20px; }
main.container { flex: 1; padding-top: 28px; padding-bottom: 56px; }

/* ---------------- 顶部导航 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; height: 60px; gap: 8px; }
.logo { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 18px; color: var(--text); }
.logo .logo-badge {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), #7c5cf0);
  color: #fff; font-size: 15px; font-weight: 800; letter-spacing: .5px;
}
.nav-links { display: flex; gap: 4px; margin-left: 14px; flex-wrap: wrap; }
.nav-links a {
  padding: 7px 13px; border-radius: 8px; color: var(--text-2); font-weight: 500; font-size: 14px;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.user-chip { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 13.5px; }
.avatar {
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: var(--primary-light); color: var(--primary); font-weight: 700; font-size: 13px;
}
.role-tag {
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 20px;
  background: var(--primary-light); color: var(--primary);
}
.role-tag.writer { background: var(--warning-bg); color: var(--warning); }
.role-tag.admin { background: var(--danger-bg); color: var(--danger); }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border-radius: 9px; border: 1px solid transparent;
  font-size: 14px; font-weight: 600; font-family: var(--font);
  cursor: pointer; transition: all .15s; line-height: 1.4; white-space: nowrap;
  background: var(--primary); color: #fff;
}
.btn:hover { background: var(--primary-dark); opacity: 1; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.outline { background: #fff; color: var(--primary); border-color: #c9d2f7; }
.btn.outline:hover { background: var(--primary-light); }
.btn.ghost { background: transparent; color: var(--text-2); }
.btn.ghost:hover { background: #f0f2f8; color: var(--text); }
.btn.danger { background: #fff; color: var(--danger); border-color: #f3c3c5; }
.btn.danger:hover { background: var(--danger-bg); }
.btn.solid-danger { background: var(--danger); color: #fff; }
.btn.solid-danger:hover { background: #c73b40; }
.btn.success { background: var(--success); color: #fff; }
.btn.success:hover { background: #128a40; }
.btn.warning { background: var(--accent); color: #fff; }
.btn.warning:hover { background: #e08d00; }
.btn.sm { padding: 6px 12px; font-size: 13px; border-radius: 7px; }
.btn.lg { padding: 12px 26px; font-size: 15px; }
.btn.block { width: 100%; }

/* ---------------- 徽章 ---------------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 11px; border-radius: 20px; font-size: 12px; font-weight: 600; white-space: nowrap;
}
.badge.pending { background: var(--bg); color: var(--text-2); border: 1px solid var(--border); }
.badge.rejected { background: var(--danger-bg); color: var(--danger); }
.badge.published { background: var(--info-bg); color: var(--info); }
.badge.accepted { background: var(--warning-bg); color: var(--warning); }
.badge.delivered { background: #f1e9fd; color: #7c3aed; }
.badge.completed { background: var(--success-bg); color: var(--success); }
.badge.cancelled { background: #eef0f4; color: var(--text-3); }
.badge.plain { background: var(--primary-light); color: var(--primary); }
.badge.gray { background: #f0f2f6; color: var(--text-2); }

/* ---------------- 卡片 ---------------- */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.card-pad { padding: 22px; }
.card-title { font-size: 17px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }

/* ---------------- 页面头部 ---------------- */
.page-head { margin-bottom: 24px; }
.page-head h1 { font-size: 24px; font-weight: 800; }
.page-head p { color: var(--text-2); margin-top: 6px; }

/* ---------------- 统计卡片 ---------------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.stat-card .num { font-size: 26px; font-weight: 800; color: var(--primary); }
.stat-card .label { color: var(--text-2); font-size: 13px; margin-top: 2px; }
.stat-card .num.warn { color: var(--accent); }
.stat-card .num.ok { color: var(--success); }
.stat-card .num.red { color: var(--danger); }

/* ---------------- 订单卡片 ---------------- */
.order-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }
.order-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 12px;
  transition: transform .15s, box-shadow .15s; cursor: pointer; position: relative;
}
.order-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.order-card .top { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.order-card .title { font-size: 15.5px; font-weight: 700; line-height: 1.45; flex: 1; }
.order-card .title.no-topic { color: var(--text-2); font-weight: 600; }
.order-card .meta { display: flex; flex-wrap: wrap; gap: 6px 14px; color: var(--text-2); font-size: 12.5px; }
.order-card .meta b { color: var(--text); font-weight: 600; }
.order-card .req { color: var(--text-2); font-size: 13px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.order-card .foot { display: flex; justify-content: space-between; align-items: center; border-top: 1px dashed var(--border); padding-top: 11px; }
.budget { color: var(--danger); font-weight: 800; font-size: 17px; }
.budget small { color: var(--text-2); font-weight: 500; font-size: 12px; }
.svc-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.svc-chip { font-size: 11.5px; padding: 2px 9px; border-radius: 6px; background: var(--bg); border: 1px solid var(--border); color: var(--text-2); }
.svc-chip.on { background: var(--primary-light); border-color: #c9d2f7; color: var(--primary); font-weight: 600; }

/* ---------------- 空状态 ---------------- */
.empty {
  text-align: center; padding: 60px 20px; color: var(--text-3);
  background: var(--card); border: 1px dashed var(--border); border-radius: var(--radius);
}
.empty .big { font-size: 42px; margin-bottom: 10px; }

/* ---------------- 表单 ---------------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 20px; }
.form-grid .full { grid-column: 1 / -1; }
.field label { display: block; font-weight: 600; font-size: 13.5px; margin-bottom: 7px; }
.field label .req { color: var(--danger); margin-left: 2px; }
.field .hint { color: var(--text-3); font-size: 12px; margin-top: 5px; }
input[type=text], input[type=password], input[type=number], input[type=date], input[type=tel], select, textarea {
  width: 100%; padding: 10px 13px; border: 1px solid var(--border); border-radius: 9px;
  font-size: 14px; font-family: var(--font); background: #fff; color: var(--text);
  outline: none; transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(67,88,232,.12); }
textarea { resize: vertical; min-height: 96px; }
select { appearance: auto; }

/* 单选卡片（有没有题目） */
.radio-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.radio-card {
  border: 2px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px; cursor: pointer;
  display: flex; align-items: center; gap: 10px; transition: all .15s; background: #fff;
}
.radio-card:hover { border-color: #c9d2f7; }
.radio-card.active { border-color: var(--primary); background: var(--primary-light); }
.radio-card .dot {
  width: 18px; height: 18px; border-radius: 50%; border: 2px solid #c3c9d6; flex-shrink: 0;
  display: grid; place-items: center; transition: all .15s;
}
.radio-card.active .dot { border-color: var(--primary); }
.radio-card.active .dot::after { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.radio-card .rc-title { font-weight: 700; font-size: 14.5px; }
.radio-card .rc-desc { color: var(--text-2); font-size: 12.5px; }

/* 复选开关 */
.check-row { display: flex; flex-wrap: wrap; gap: 10px; }
.check-box {
  display: flex; align-items: center; gap: 8px; padding: 9px 14px; border: 1.5px solid var(--border);
  border-radius: 9px; cursor: pointer; font-size: 13.5px; font-weight: 500; user-select: none; transition: all .15s; background: #fff;
}
.check-box input { display: none; }
.check-box.on { border-color: var(--primary); background: var(--primary-light); color: var(--primary); font-weight: 600; }
.check-box .tick { width: 16px; height: 16px; border-radius: 4px; border: 2px solid #c3c9d6; display: grid; place-items: center; font-size: 11px; color: transparent; }
.check-box.on .tick { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 上传 */
.upload-box {
  border: 2px dashed var(--border); border-radius: var(--radius-sm); padding: 22px; text-align: center;
  color: var(--text-2); cursor: pointer; transition: all .15s; font-size: 13.5px;
}
.upload-box:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.file-list { margin-top: 10px; display: flex; flex-direction: column; gap: 8px; }
.file-item {
  display: flex; align-items: center; gap: 10px; padding: 9px 13px; background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; font-size: 13px;
}
.file-item .fname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-item .fsize { color: var(--text-3); font-size: 12px; }
.file-item .x { cursor: pointer; color: var(--danger); font-weight: 700; padding: 0 4px; }

/* ---------------- 订单详情 ---------------- */
.detail-grid { display: grid; grid-template-columns: 1fr 360px; gap: 20px; align-items: start; }
.detail-block { margin-bottom: 20px; }
.detail-block h3 { font-size: 15px; font-weight: 700; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.detail-block h3::before { content: ""; width: 4px; height: 16px; border-radius: 2px; background: var(--primary); }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 8px 12px; font-size: 13.5px; }
.kv .k { color: var(--text-2); }
.kv .v { color: var(--text); font-weight: 500; word-break: break-all; }
.kv-row { padding: 8px 0; border-bottom: 1px dashed var(--border); display: flex; justify-content: space-between; gap: 10px; }
.kv-row:last-child { border-bottom: none; }
.kv-row .k { color: var(--text-2); flex-shrink: 0; }
.kv-row .v { text-align: right; font-weight: 500; }

/* 时间线 */
.timeline { position: relative; padding-left: 22px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 4px; bottom: 4px; width: 2px; background: var(--border); }
.tl-item { position: relative; padding-bottom: 16px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -22px; top: 4px; width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3px solid var(--border);
}
.tl-item.done::before { border-color: var(--primary); }
.tl-item.current::before { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 0 4px rgba(245,158,11,.2); }
.tl-item .tl-title { font-weight: 600; font-size: 13.5px; }
.tl-item .tl-time { color: var(--text-3); font-size: 12px; }

/* 聊天 */
.chat-box { display: flex; flex-direction: column; height: 420px; background: #f8f9fd; border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.chat-list { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 78%; display: flex; flex-direction: column; gap: 2px; }
.msg .who { font-size: 11.5px; color: var(--text-3); }
.msg .bubble { padding: 9px 13px; border-radius: 12px; font-size: 13.5px; background: #fff; border: 1px solid var(--border); word-break: break-word; }
.msg.mine { align-self: flex-end; align-items: flex-end; }
.msg.mine .bubble { background: var(--primary); color: #fff; border-color: var(--primary); border-bottom-right-radius: 3px; }
.msg.other .bubble { border-bottom-left-radius: 3px; }
.msg.system { align-self: center; max-width: 100%; }
.msg.system .bubble { background: transparent; border: none; color: var(--text-3); font-size: 12px; text-align: center; padding: 2px 8px; }
.chat-input { display: flex; gap: 8px; padding: 12px; background: #fff; border-top: 1px solid var(--border); }
.chat-input input { flex: 1; }
.chat-input .btn { flex-shrink: 0; }

/* ---------------- 表格 ---------------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { background: #f7f8fc; font-weight: 600; color: var(--text-2); white-space: nowrap; }
tr:hover td { background: #fafbfe; }
.td-title { max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }

/* ---------------- Tabs ---------------- */
.tabs { display: flex; gap: 6px; border-bottom: 1px solid var(--border); margin-bottom: 20px; flex-wrap: wrap; }
.tab {
  padding: 9px 16px; border: none; background: none; cursor: pointer; font-size: 14px; font-weight: 600;
  color: var(--text-2); border-bottom: 2px solid transparent; font-family: var(--font); margin-bottom: -1px;
}
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab .cnt { margin-left: 5px; font-size: 11.5px; background: var(--bg); padding: 1px 7px; border-radius: 10px; }

/* ---------------- 英雄区（首页） ---------------- */
.hero {
  background: linear-gradient(135deg, #3143c8 0%, #4358e8 45%, #6d5cf0 100%);
  color: #fff; border-radius: 18px; padding: 46px 40px; position: relative; overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero::after {
  content: ""; position: absolute; right: -70px; top: -70px; width: 260px; height: 260px; border-radius: 50%;
  background: rgba(255,255,255,.08);
}
.hero::before {
  content: ""; position: absolute; right: 90px; bottom: -100px; width: 200px; height: 200px; border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.hero h1 { font-size: 30px; font-weight: 800; margin-bottom: 12px; position: relative; z-index: 1; }
.hero p { font-size: 15.5px; opacity: .92; max-width: 560px; position: relative; z-index: 1; }
.hero .actions { margin-top: 26px; display: flex; gap: 12px; position: relative; z-index: 1; flex-wrap: wrap; }
.hero .btn { background: #fff; color: var(--primary); }
.hero .btn.outline-w { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.7); }
.hero .btn.outline-w:hover { background: rgba(255,255,255,.14); }
.hero .btn:hover { transform: translateY(-1px); }

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin-top: 8px; }
.step { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); position: relative; }
.step .no {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: var(--primary-light); color: var(--primary); font-weight: 800; font-size: 15px; margin-bottom: 12px;
}
.step h3 { font-size: 15px; margin-bottom: 6px; }
.step p { color: var(--text-2); font-size: 13px; }

/* ---------------- Toast ---------------- */
#toast-root { position: fixed; top: 74px; left: 50%; transform: translateX(-50%); z-index: 999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 11px 20px; border-radius: 10px; color: #fff; font-size: 14px; font-weight: 600;
  box-shadow: var(--shadow-lg); animation: toastIn .2s ease; max-width: 420px;
}
.toast.ok { background: var(--success); }
.toast.err { background: var(--danger); }
.toast.info { background: #334155; }
@keyframes toastIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

/* ---------------- Modal ---------------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15,20,40,.5); z-index: 200;
  display: grid; place-items: center; padding: 20px; animation: fadeIn .15s;
}
.modal { background: #fff; border-radius: var(--radius); width: 100%; max-width: 420px; box-shadow: var(--shadow-lg); }
.modal-head { padding: 18px 22px 0; font-weight: 700; font-size: 16px; }
.modal-body { padding: 16px 22px; color: var(--text-2); }
.modal-foot { padding: 0 22px 18px; display: flex; justify-content: flex-end; gap: 10px; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* 星级评价 */
.stars { display: flex; gap: 6px; }
.star { font-size: 26px; cursor: pointer; color: #d8dbe4; transition: transform .12s; user-select: none; }
.star.on { color: var(--accent); }
.star:hover { transform: scale(1.15); }

/* 标签 */
.tag { display: inline-block; padding: 3px 10px; border-radius: 6px; font-size: 12px; background: var(--bg); color: var(--text-2); border: 1px solid var(--border); margin: 2px; }
.tag.pri { background: var(--primary-light); color: var(--primary); border-color: #c9d2f7; }

/* ---------------- Footer ---------------- */
.footer { border-top: 1px solid var(--border); padding: 24px 0; margin-top: auto; background: #fff; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 12px; color: var(--text-3); font-size: 13px; flex-wrap: wrap; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .detail-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 640px) {
  .hero { padding: 32px 24px; }
  .hero h1 { font-size: 23px; }
  .radio-cards { grid-template-columns: 1fr; }
  .order-grid { grid-template-columns: 1fr; }
}

/* ================ LW 需求平台补充样式 ================ */
/* 需求编号大号展示 */
.req-id {
  font-size: 34px; font-weight: 900; letter-spacing: 4px;
  font-family: Consolas, "Courier New", monospace;
  color: var(--primary); background: var(--primary-light);
  border: 2px dashed #c9d2f7; border-radius: 12px;
  padding: 14px 26px; display: inline-block;
}
/* 提示/警告框 */
.warn-box {
  background: var(--warning-bg); border: 1.5px solid #f0c47c; color: #92400e;
  border-radius: 12px; padding: 16px 20px; text-align: left;
  max-width: 460px; margin: 6px auto 0;
}
/* 上传文件位 */
.slot-row {
  border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px;
  margin-bottom: 10px; background: #fff; display: flex; align-items: center;
  gap: 10px; flex-wrap: wrap;
}
.slot-head { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 220px; }
.slot-no {
  width: 26px; height: 26px; border-radius: 7px; background: var(--primary-light);
  color: var(--primary); font-weight: 800; font-size: 12px;
  display: grid; place-items: center; flex-shrink: 0;
}
.slot-label { font-weight: 600; font-size: 13.5px; }
.slot-hint { color: var(--text-3); font-size: 11.5px; }
.slot-btn.selected { background: var(--success); border-color: var(--success); color: #fff; }
.slot-chosen { flex-basis: 100%; }
.slot-chosen .file-item { margin-top: 0; }
/* 进度说明框 */
.progress-box {
  background: var(--info-bg); border-left: 4px solid var(--info); border-radius: 8px;
  padding: 12px 16px; font-size: 13.5px; color: #0c4a6e; line-height: 1.8;
}
/* 新状态徽章 */
.badge.submitted { background: var(--primary-light); color: var(--primary); }
.badge.processing { background: var(--warning-bg); color: var(--warning); }
/* 后台详情弹窗内排版 */
.modal-body h3 { font-size: 14.5px; margin-bottom: 10px; }
.modal-body .kv { grid-template-columns: 92px 1fr; }
.modal-body .detail-block { margin-bottom: 16px; }