/* ============================================
   云自习室 · 样式（2026-09-30）
   暖米白纸色 + 墨色 + 抹茶绿，与站内 Design v2 同风格
   ============================================ */
:root {
    --bg: #f7f5f1;
    --card: #ffffff;
    --ink: #2f2a24;
    --text2: #6b6357;
    --text3: #9a9184;
    --line: #e8e2d6;
    --green: #5a7d6f;
    --gold: #b89a67;
    --terra: #c76c4a;
    --red: #cc524a;
    --shadow: 0 2px 14px rgba(60, 50, 30, .07);
    --r: 16px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 1.7;
}
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 18px; }

/* 顶栏 */
.topbar { background: #fff; border-bottom: 1px solid var(--line); }
.tb-inner { display: flex; justify-content: space-between; align-items: center; height: 58px; }
.brand { font-family: Georgia, "Songti SC", serif; font-size: 18px; font-weight: 700; color: var(--ink); }
.brand span { margin-left: 8px; font-size: 13px; color: var(--gold); letter-spacing: 2px; }
.tb-right { display: flex; gap: 16px; align-items: center; }
.tb-link { font-size: 13px; color: var(--text2); }
.tb-user { font-size: 13px; color: var(--text2); }

/* 头部 */
.hero { text-align: center; padding: 34px 0 22px; }
.hero h1 { font-family: Georgia, "Songti SC", serif; font-size: 34px; letter-spacing: 2px; }
.hero .sub { color: var(--text2); font-size: 14px; margin-top: 8px; }
.hero .sub b { color: var(--green); font-size: 18px; }

/* 布局 */
.grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 18px; margin-bottom: 30px; }
.card { background: var(--card); border-radius: var(--r); box-shadow: var(--shadow); padding: 26px; }

/* 计时器 */
.timer-card { display: flex; flex-direction: column; align-items: center; }
.ring-wrap { position: relative; width: 250px; height: 250px; margin: 4px 0 14px; }
.ring-wrap svg { width: 100%; height: 100%; }
.ring-bg { fill: none; stroke: #ece7db; stroke-width: 11; }
.ring-fg { fill: none; stroke: var(--green); stroke-width: 11; stroke-linecap: round; transform: rotate(-90deg); transform-origin: center; transition: stroke-dashoffset .25s linear; }
.ring-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.time { font-family: "Songti SC", Georgia, serif; font-size: 52px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: 1px; }
.state { font-size: 12.5px; color: var(--text3); margin-top: 6px; }

/* 预设 & 按钮 */
.presets { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 16px; }
.preset {
    border: 1px solid var(--line); background: #fbfaf7; color: var(--text2);
    border-radius: 999px; padding: 8px 22px; font-size: 13.5px; cursor: pointer; transition: all .2s;
    white-space: nowrap; flex: none;
}
.preset:hover { border-color: var(--green); color: var(--green); }
.preset.active { background: var(--green); border-color: var(--green); color: #fff; }
.controls { display: flex; gap: 12px; margin-bottom: 14px; }
.btn {
    border: none; border-radius: 999px; padding: 12px 42px; font-size: 15px; cursor: pointer;
    transition: all .2s; font-family: inherit;
}
.btn.main { background: var(--green); color: #fff; }
.btn.main:hover { background: #4c6b5f; }
.btn.main:disabled { background: #c9c4b8; cursor: not-allowed; }
.btn.ghost { background: #fbfaf7; border: 1px solid var(--line); color: var(--text2); }
.btn.ghost:hover { border-color: var(--green); color: var(--green); }
.btn.checkin { width: 100%; margin-top: 12px; padding: 11px 0; background: var(--terra); color: #fff; font-size: 14px; }
.btn.checkin:hover { background: #b95f3f; }
.btn.checkin:disabled { background: #dad3c6; cursor: not-allowed; }

.mystat { font-size: 13.5px; color: var(--text2); margin: 4px 0 10px; }
.mystat b { color: var(--green); font-size: 16px; }
.tips { font-size: 12.5px; color: var(--text3); text-align: center; line-height: 1.9; border-top: 1px dashed var(--line); padding-top: 14px; margin-top: 6px; width: 100%; }
.tips b { color: var(--terra); }

/* 侧栏 */
.side { display: flex; flex-direction: column; gap: 18px; }
.online-card { text-align: center; padding: 22px; }
.on-line { font-size: 15px; color: var(--text2); }
.on-line b { color: var(--green); font-size: 26px; font-variant-numeric: tabular-nums; }
.on-sub { font-size: 12.5px; color: var(--text3); margin-top: 6px; }
.on-sub b { color: var(--terra); }

.rank-card h3 { font-size: 15px; margin-bottom: 14px; display: flex; justify-content: space-between; align-items: baseline; }
.rank-date { font-size: 12px; color: var(--text3); font-weight: 400; }
.rank-list { list-style: none; }
.rank-list li {
    display: flex; align-items: center; gap: 10px; padding: 8px 10px;
    border-radius: 10px; font-size: 13.5px;
}
.rank-list li.me { background: #f2f7f4; }
.rank-list li.empty { color: var(--text3); justify-content: center; padding: 18px 0; font-size: 13px; }
.rank-list .no { width: 22px; height: 22px; border-radius: 50%; background: #f0ece2; color: var(--text2); font-size: 12px; display: flex; align-items: center; justify-content: center; flex: none; }
.rank-list .no.n1 { background: #f6e8c8; color: #8a6d2f; }
.rank-list .no.n2 { background: #eceef0; color: #6a7077; }
.rank-list .no.n3 { background: #f4e4da; color: #9c6136; }
.rank-list .nick { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-list .num { color: var(--text3); font-size: 12.5px; white-space: nowrap; }
.rank-list .num b { color: var(--green); }
.crazy {
    flex: none; font-size: 11px; color: #fff; background: linear-gradient(120deg, #c76c4a, #cc524a);
    border-radius: 999px; padding: 2px 9px; letter-spacing: 1px;
}
.my-rank { margin-top: 12px; font-size: 13.5px; color: var(--text2); border-top: 1px dashed var(--line); padding-top: 12px; }
.my-rank b { color: var(--green); }

/* 底部 */
.foot { text-align: center; color: var(--text3); font-size: 12.5px; padding: 10px 0 40px; }

/* 弹窗 */
.modal {
    display: none; position: fixed; inset: 0; background: rgba(40, 34, 24, .45);
    z-index: 999; align-items: center; justify-content: center; padding: 18px;
}
.modal-card {
    background: #fff; border-radius: 18px; padding: 34px 28px; max-width: 420px; width: 100%;
    text-align: center; box-shadow: 0 18px 60px rgba(40, 30, 10, .22);
}
.m-emoji { font-size: 44px; }
.modal-card h2 { font-family: Georgia, "Songti SC", serif; font-size: 24px; margin: 8px 0 6px; }
.modal-card p { color: var(--text2); font-size: 13.5px; margin-bottom: 18px; }
.m-btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.m-btns .btn { padding: 10px 22px; font-size: 13.5px; }
.m-note { display: none; gap: 8px; margin-top: 14px; }
.m-note textarea {
    flex: 1; border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px;
    font-size: 13.5px; font-family: inherit; outline: none; min-width: 0;
    resize: vertical; line-height: 1.6;
}
.m-note textarea:focus { border-color: var(--green); }
.m-note .btn { padding: 10px 20px; align-self: flex-end; }

/* 目标 */
.goal-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 2px 0 10px; font-size: 13.5px; }
.goal-label { color: var(--ink); }
.goal-label b { color: var(--terra); font-size: 15px; }
.goal-prog { color: var(--text3); font-size: 12.5px; }
.goal-edit { font-size: 12.5px; color: var(--text3); text-decoration: underline; }
.goal-set { color: var(--terra); font-size: 13.5px; border: 1px dashed #e3c8b8; border-radius: 999px; padding: 6px 16px; }
.goal-set:hover { background: #faf3ee; text-decoration: none; }
.goal-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 2px 0 10px; }
.goal-form input[type=text] { flex: 1; min-width: 150px; border: 1px solid var(--line); border-radius: 10px; padding: 9px 12px; font-size: 13px; font-family: inherit; outline: none; }
.goal-form input[type=text]:focus { border-color: var(--green); }
.goal-form input[type=number] { border: 1px solid var(--line); border-radius: 10px; padding: 9px 10px; font-size: 13px; outline: none; width: 96px; }
.btn.sm { padding: 9px 18px; font-size: 13px; }
.goal-extra { width: 100%; font-size: 12.5px; color: var(--text3); }
.goal-extra a { color: var(--text3); text-decoration: underline; }
.goal-extra a:hover { color: var(--terra); }

/* 学习数据卡 */
.data-card { margin-top: 18px; }
.data-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin-bottom: 12px; }
.data-head h3 { font-size: 15px; }
.data-btns { display: flex; gap: 8px; }
.trend-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; margin-bottom: 10px; }
.trend-tabs { display: flex; gap: 6px; }
.trend-tabs .tt { font-size: 12.5px; color: var(--text3); padding: 5px 14px; border-radius: 999px; border: 1px solid var(--line); text-decoration: none; }
.trend-tabs .tt.active { background: var(--green); border-color: var(--green); color: #fff; }
.trend-tabs .tt:hover { text-decoration: none; }
.data-chips { font-size: 12.5px; color: var(--text3); }
.data-chips b { color: var(--green); }
.trend-chart { display: flex; align-items: flex-end; gap: 4px; height: 150px; padding-top: 8px; }
.trend-chart .tbar { flex: 1; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; }
.trend-chart .tbar i { width: 70%; max-width: 26px; background: var(--green); border-radius: 4px 4px 0 0; display: block; transition: height .3s; }
.trend-chart .tbar.today i { background: var(--terra); }
.trend-chart .tbar.zero i { background: #e8e3d8 !important; height: 3px !important; border-radius: 2px; }
.trend-chart .tbar span { font-size: 10.5px; color: var(--text3); margin-top: 4px; height: 14px; }
.trend-loading { color: var(--text3); font-size: 13px; margin: auto; }

/* 弹窗扩展 */
.modal-card.wide { max-width: 520px; }
.rep-tabs { display: flex; gap: 8px; justify-content: center; margin-bottom: 16px; }
.rep-tabs .rt { font-size: 13px; color: var(--text3); padding: 6px 20px; border-radius: 999px; border: 1px solid var(--line); text-decoration: none; }
.rep-tabs .rt.active { background: var(--green); border-color: var(--green); color: #fff; }
.rep-tabs .rt:hover { text-decoration: none; }
.rep-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.rep-cell { background: #faf8f4; border-radius: 12px; padding: 12px 14px; text-align: left; }
.rep-cell .k { font-size: 12px; color: var(--text3); }
.rep-cell .v { font-size: 16px; font-weight: 700; color: var(--ink); margin-top: 3px; }
.rep-hint { font-size: 12.5px; color: var(--text3); margin-bottom: 10px; }
.rec-list { list-style: none; max-height: 300px; overflow-y: auto; margin-bottom: 12px; text-align: left; }
.rec-list li { display: flex; align-items: center; gap: 10px; padding: 9px 4px; border-bottom: 1px dashed var(--line); font-size: 13.5px; }
.rec-list .rt { color: var(--text3); font-size: 12.5px; width: 44px; flex: none; }
.rec-list .rm { color: var(--ink); font-weight: 600; flex: none; }
.rec-list .rg { flex: 1; color: var(--text3); font-size: 12.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rec-list a { color: #c0392b; font-size: 12.5px; flex: none; }
.rec-list .empty { justify-content: center; color: var(--text3); border: none; }
.rec-bulk { display: flex; gap: 10px; justify-content: center; }
.btn.danger { background: rgba(204, 82, 74, .1); border: 1px solid rgba(204, 82, 74, .45); color: #c0392b; }
.btn.danger:hover { background: rgba(204, 82, 74, .18); }
.undo-line { margin-top: 12px; font-size: 12.5px; }
.undo-line a { color: var(--text3); text-decoration: underline; }
.undo-line a:hover { color: var(--terra); }

/* 当前任务 */
.cur-task { font-size: 12.5px; color: var(--text3); margin: 6px 0 2px; text-align: center; }
.cur-task b { color: var(--terra); }
.cur-task a { margin-left: 6px; font-size: 11.5px; }

/* 计时设置入口 */
.set-line { font-size: 12.5px; margin: 2px 0 10px; }
.set-line a { color: var(--text3); }
.set-line a:hover { color: var(--green); text-decoration: none; }
.vip-mini { font-size: 10px; color: #fff; background: linear-gradient(120deg, #c9a25f, #8a6d2f); border-radius: 999px; padding: 1px 7px; margin-left: 4px; }

/* 背景声条 */
.sound-bar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: center; width: 100%; border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 4px; font-size: 12.5px; }
.sound-label { color: var(--text3); }
.sound-lock { color: var(--gold); }
.sound-ctrl { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: center; }
.s-chip { font-size: 12px; color: var(--text3); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; text-decoration: none; }
.s-chip:hover { text-decoration: none; border-color: var(--green); }
.s-chip.active { background: var(--green); border-color: var(--green); color: #fff; }
.s-toggle { font-size: 12px; color: var(--green); border: 1px solid rgba(90, 125, 111, .4); border-radius: 50%; width: 26px; height: 26px; display: inline-flex; align-items: center; justify-content: center; text-decoration: none; }
.s-vol { width: 80px; accent-color: var(--green); }

/* 任务卡 */
.task-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.task-head h3 { font-size: 15px; }
.vip-tag { font-size: 10.5px; color: #fff; background: linear-gradient(120deg, #c9a25f, #8a6d2f); border-radius: 999px; padding: 2px 9px; }
.lock-box { text-align: center; padding: 8px 0; }
.lock-box p { font-size: 12.5px; color: var(--text3); margin-bottom: 10px; }
.task-list { list-style: none; max-height: 320px; overflow-y: auto; }
.task-item { display: flex; align-items: center; gap: 7px; padding: 7px 6px; border-radius: 9px; font-size: 13px; }
.task-item:hover { background: #faf8f3; }
.task-item.t-child { padding-left: 24px; }
.task-item.t-done .t-title { text-decoration: line-through; color: var(--text3); }
.task-item.t-cur { background: #f2f7f4; }
.task-item.t-cur .t-title { color: var(--green); font-weight: 600; }
.t-check { cursor: pointer; color: var(--green); flex: none; }
.t-title { flex: 1; cursor: pointer; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.t-meta { font-size: 11.5px; color: var(--text3); flex: none; }
.t-tags { font-size: 10.5px; color: var(--gold); flex: none; }
.t-del { color: var(--text3); font-size: 14px; flex: none; }
.t-del:hover { color: #c0392b; }
.task-list .empty { color: var(--text3); font-size: 12.5px; text-align: center; padding: 12px 0; }
.t-sep { font-size: 11px; color: var(--text3); padding: 6px 6px 2px; border-top: 1px dashed var(--line); margin-top: 6px; }
.task-add { margin-top: 10px; border-top: 1px dashed var(--line); padding-top: 10px; }
.task-add input[type=text] { width: 100%; border: 1px solid var(--line); border-radius: 9px; padding: 8px 11px; font-size: 13px; outline: none; margin-bottom: 7px; font-family: inherit; }
.task-add input[type=text]:focus { border-color: var(--green); }
.task-opts { display: grid; grid-template-columns: 96px 1fr 1fr; gap: 7px; align-items: center; }
.task-opts input, .task-opts select { border: 1px solid var(--line); border-radius: 9px; padding: 7px 9px; font-size: 12.5px; outline: none; background: #fff; font-family: inherit; width: 100%; min-width: 0; box-sizing: border-box; }
.task-opts .btn { grid-column: 1 / -1; padding: 9px; font-size: 13px; }

/* 会员卡 + 弹窗 */
.vip-card { text-align: center; }
.vip-status { font-size: 13.5px; color: var(--text2); }
.vip-status b { color: var(--terra); font-size: 16px; }
.vip-status a { margin-left: 6px; font-size: 12px; }
.vip-title { font-family: Georgia, "Songti SC", serif; font-size: 17px; margin-bottom: 6px; color: #8a6d2f; }
.vip-sub { font-size: 12px; color: var(--text3); margin-bottom: 12px; }
.vip-benefits { list-style: none; text-align: left; background: #faf8f3; border-radius: 12px; padding: 14px 18px; margin-bottom: 16px; }
.vip-benefits li { font-size: 13px; color: var(--text2); padding: 5px 0; }
.vip-plans { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.vip-plan { border: 1px solid var(--line); border-radius: 14px; padding: 16px 12px; }
.vip-plan.hot { border-color: rgba(199, 108, 74, .45); background: #fffaf6; }
.vp-name { font-size: 13.5px; color: var(--text2); margin-bottom: 6px; }
.vp-tip { font-size: 10.5px; color: var(--terra); }
.vp-price { font-size: 26px; font-weight: 700; color: var(--ink); margin-bottom: 12px; }
.vp-price span { font-size: 11.5px; color: var(--text3); font-weight: 400; }
.vip-plan .btn { width: 100%; padding: 9px 0; font-size: 13px; }
.vip-note { font-size: 12px; color: var(--text3); }
.vip-note b { color: var(--green); }

/* 设置弹窗 */
.set-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; text-align: left; }
.set-grid label { font-size: 12.5px; color: var(--text2); display: flex; flex-direction: column; gap: 5px; }
.set-grid input { border: 1px solid var(--line); border-radius: 9px; padding: 9px 11px; font-size: 14px; outline: none; font-family: inherit; }
.set-grid input:focus { border-color: var(--green); }

/* 活动横幅 + 邀请码 */
.promo-bar { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; background: linear-gradient(120deg, #fdf3e6, #fae9dc); border: 1px solid #f0d9c2; border-radius: 14px; padding: 12px 18px; margin: 2px 0 16px; font-size: 13.5px; color: #7a5a34; }
.promo-bar b { color: var(--terra); }
.promo-bar.claimed { background: #f2f7f4; border-color: #d8e6de; color: var(--green); justify-content: center; }
.promo-bar .btn { padding: 8px 22px; font-size: 13px; }
.vip-promo-note { background: #fdf3e6; border: 1px dashed #e8c9a8; border-radius: 10px; padding: 9px 14px; font-size: 12.5px; color: #7a5a34; margin-bottom: 12px; text-align: center; }
.vip-promo-note a { color: var(--terra); font-weight: 600; }
.vip-gift { border-top: 1px dashed var(--line); padding-top: 12px; margin-top: 12px; text-align: left; }
.vg-title { font-size: 13.5px; font-weight: 700; margin-bottom: 5px; }
.vg-sub { font-size: 12px; color: var(--text3); margin-bottom: 9px; line-height: 1.7; }
.gift-code { margin-top: 10px; background: #faf8f3; border-radius: 10px; padding: 10px 14px; font-size: 12.5px; color: var(--text2); }
.gc-line { display: flex; align-items: center; gap: 10px; margin-top: 6px; }
.gc-line b { font-size: 15px; letter-spacing: 1px; color: var(--ink); font-family: Consolas, monospace; }
.gc-line a { font-size: 12px; }
.code-redeem { display: flex; gap: 8px; }
.code-redeem input { flex: 1; border: 1px solid var(--line); border-radius: 9px; padding: 9px 12px; font-size: 13.5px; outline: none; font-family: Consolas, monospace; letter-spacing: 1px; text-transform: uppercase; }
.code-redeem input:focus { border-color: var(--green); }
.admin-code-card { margin-top: 18px; }
.code-gen { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; font-size: 13px; color: var(--text2); }
.code-gen input { border: 1px solid var(--line); border-radius: 9px; padding: 8px 10px; font-size: 13px; outline: none; }
.code-gen input[type=number] { width: 76px; }
.code-gen input[type=text] { flex: 1; min-width: 140px; }
.code-list { list-style: none; }
.code-list li { display: flex; align-items: center; gap: 12px; padding: 8px 4px; border-bottom: 1px dashed var(--line); font-size: 13px; flex-wrap: wrap; }
.code-list li.used b { color: var(--text3); text-decoration: line-through; }
.code-list b { font-family: Consolas, monospace; letter-spacing: 1px; }
.code-list .cl-meta { flex: 1; font-size: 12px; color: var(--text3); }
.code-list a { font-size: 12px; }
.code-list a.del { color: var(--red); }
.code-list .empty { justify-content: center; color: var(--text3); border: none; }

/* 移动端 */
@media (max-width: 820px) {
    .grid { grid-template-columns: 1fr; }
    .ring-wrap { width: 218px; height: 218px; }
    .time { font-size: 44px; }
    .hero h1 { font-size: 27px; }
    .btn { padding: 12px 30px; }
    .tb-right { gap: 10px; }
}