/* 海纳·村播学院 墨绿金视觉体系 v1.0 */
:root {
  --green: #1F4E3D;
  --green-deep: #16382C;
  --gold: #C8912A;
  --cream: #F5F4F0;
  --gray: #6B7280;
  --white: #FFFFFF;
  --line: #EDE9DF;
  --red: #8B2C1F;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Microsoft YaHei', 'PingFang SC', 'DengXian', system-ui, sans-serif;
  background: var(--cream);
  color: #2A2A2A;
  font-size: 14px;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== 顶部导航 ===== */
.topbar {
  background: var(--green);
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px; position: sticky; top: 0; z-index: 100;
}
.logo { display: flex; align-items: center; gap: 8px; color: #fff; }
.logo-mark {
  width: 26px; height: 26px; border: 1.5px solid var(--gold); border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  color: var(--gold); font-size: 14px; font-weight: 700;
}
.logo-name { font-size: 17px; font-weight: 600; letter-spacing: 1px; }
.logo-sub { color: rgba(255,255,255,.5); font-size: 11px; margin-left: 6px; }
.nav { display: flex; align-items: center; gap: 18px; color: rgba(255,255,255,.85); font-size: 13px; }
.nav a:hover { color: var(--gold); }
.nav a.active { color: var(--gold); padding-bottom: 2px; border-bottom: 1.5px solid var(--gold); }
.nav .btn-login {
  border: 1px solid rgba(255,255,255,.6); border-radius: 3px; padding: 3px 14px;
}
.nav .btn-login:hover { background: rgba(255,255,255,.12); color: #fff; }
.nav .btn-admin { border: 1px solid var(--gold); color: var(--gold); border-radius: 3px; padding: 3px 10px; }

/* 移动端汉堡 */
.menu-toggle { display: none; background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; }
@media (max-width: 768px) {
  .nav { display: none; position: absolute; top: 52px; left: 0; right: 0;
         background: var(--green-deep); flex-direction: column; padding: 14px 24px; align-items: flex-start; gap: 12px; }
  .nav.open { display: flex; }
  .menu-toggle { display: block; }
  .logo-sub { display: none; }
}

/* ===== 搜索 ===== */
.search-bar { display: flex; gap: 8px; padding: 12px 24px; background: var(--cream); }
.search-input {
  flex: 1; border: 1px solid #DDD8CC; border-radius: 3px; padding: 8px 14px;
  font-size: 13px; background: #fff; outline: none;
}
.search-input:focus { border-color: var(--green); }
.search-btn {
  background: var(--green); color: #fff; border: none; border-radius: 3px;
  padding: 8px 26px; font-size: 13px; cursor: pointer;
}
.search-btn:hover { background: var(--green-deep); }

/* ===== 主体容器 ===== */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ===== Banner ===== */
.banner {
  background: var(--green-deep); padding: 44px 48px; margin: 0 24px;
  border-radius: 2px; max-width: 1080px; margin-left: auto; margin-right: auto;
}
.banner .rule { width: 30px; height: 2px; background: var(--gold); margin-bottom: 14px; }
.banner h1 { color: #fff; font-size: 26px; font-weight: 600; letter-spacing: 2px; }
.banner p { color: rgba(255,255,255,.6); font-size: 13px; margin-top: 8px; }

/* ===== 分类标签 ===== */
.cats { display: flex; gap: 8px; flex-wrap: wrap; padding: 20px 0 4px; }
.cat {
  border-radius: 14px; padding: 5px 16px; font-size: 12px; cursor: pointer;
  background: #fff; border: 1px solid var(--line); color: var(--gray);
}
.cat.active { background: var(--green); color: #fff; border-color: var(--green); }
.cat:hover { border-color: var(--green); }

/* ===== 课程卡片 ===== */
.course-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 16px; padding: 16px 0 40px;
}
.course-card {
  background: #fff; border: 1px solid var(--line); border-radius: 4px;
  overflow: hidden; transition: transform .1s;
}
.course-card:hover { box-shadow: 0 2px 12px rgba(0,0,0,.06); transform: translateY(-1px); }
.course-card:nth-child(odd) .cc-cover { background: #1F4E3D; }
.course-card:nth-child(even) .cc-cover { background: #16382C; }
.cc-cover {
  height: 134px; display: flex; flex-direction: column; align-items: flex-start;
  justify-content: flex-end; padding: 0 16px 12px; position: relative;
  background-size: cover; background-position: center;
}
.cc-cover .cat-tag {
  position: absolute; top: 12px; left: 14px;
  color: var(--gold); font-size: 10px; border: .5px solid var(--gold);
  border-radius: 2px; padding: 1px 7px; background: rgba(0,0,0,.18);
}
.cc-cover .cc-title {
  color: #fff; font-size: 16px; font-weight: 600; line-height: 1.35;
  text-shadow: 0 1px 8px rgba(0,0,0,.4); margin: 0;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.cc-cover .type-tag {
  position: absolute; top: 12px; right: 10px; color: rgba(255,255,255,.9);
  font-size: 10px; border: .5px solid rgba(255,255,255,.5); border-radius: 2px; padding: 1px 6px;
  background: rgba(0,0,0,.18);
}
/* 有自定义封面：封面区按 16:9 比例自适应（与封面同比例→完整显示不裁切），叠加课程标题与底部遮罩 */
.cc-cover.has-img {
  height: auto; aspect-ratio: 16 / 9; padding: 0;
}
.cc-cover.has-img::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 62%;
  background: linear-gradient(to top, rgba(0,0,0,.72), rgba(0,0,0,0));
  pointer-events: none;
}
.cc-cover.has-img .cat-tag { top: 10px; left: 10px; }
.cc-cover.has-img .type-tag { top: 10px; right: 10px; }
.cc-cover.has-img .cc-title {
  position: absolute; bottom: 10px; left: 14px; right: 14px; z-index: 1;
  margin: 0; color: #fff; font-size: 15px; font-weight: 600; line-height: 1.35;
  text-shadow: 0 1px 6px rgba(0,0,0,.5);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.cc-body { padding: 12px 16px; }
.cc-intro {
  font-size: 12px; color: #4A5560; line-height: 1.55; margin-bottom: 6px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.cc-meta { font-size: 11px; color: var(--gray); }
.cc-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; }
.price { color: var(--gold); font-size: 17px; font-weight: 700; }
.price .free { color: var(--green); font-size: 14px; font-weight: 600; }
.cc-btn {
  font-size: 11px; color: var(--green); border: .5px solid var(--green);
  border-radius: 2px; padding: 2px 10px;
}
.cc-btn.solid { background: var(--green); color: #fff; border: none; padding: 4px 14px; }

/* ===== 页脚 ===== */
.footer {
  background: var(--green-deep); color: rgba(255,255,255,.5);
  text-align: center; font-size: 11px; padding: 16px; margin-top: 20px;
}

/* ===== 首页广告位轮播 ===== */
.ad-carousel {
  position: relative; overflow: hidden; border-radius: 2px;
  margin-bottom: 0; margin-top: 0;
}
.ad-track { display: flex; transition: transform .45s ease; }
.ad-slide {
  position: relative; min-width: 100%; height: 170px;
  display: flex; align-items: center; padding: 0 48px; overflow: hidden;
}
.ad-text { position: relative; z-index: 2; }
.ad-title { color: #fff; font-size: 23px; font-weight: 600; letter-spacing: 1px; }
.ad-sub { color: rgba(255,255,255,.65); font-size: 13px; margin-top: 8px; }
.ad-go {
  display: inline-block; margin-top: 14px; color: var(--gold);
  font-size: 12px; border: .5px solid var(--gold); border-radius: 2px;
  padding: 3px 14px;
}
.ad-slide:hover .ad-go { background: var(--gold); color: var(--green-deep); }
.ad-dots {
  position: absolute; bottom: 12px; left: 0; right: 0;
  display: flex; justify-content: center; gap: 7px; z-index: 5;
}
.ad-dot {
  width: 7px; height: 7px; border-radius: 50%; background: rgba(255,255,255,.4);
  cursor: pointer;
}
.ad-dot.on { background: var(--gold); }
.ad-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 30px; height: 44px; background: rgba(0,0,0,.25); border: none;
  color: #fff; font-size: 20px; cursor: pointer; z-index: 5; line-height: 1;
}
.ad-arrow:hover { background: rgba(0,0,0,.45); }
.ad-prev { left: 0; border-radius: 0 3px 3px 0; }
.ad-next { right: 0; border-radius: 3px 0 0 3px; }
@media (max-width: 768px) {
  .ad-slide { height: 130px; padding: 0 30px; }
  .ad-title { font-size: 18px; }
  .ad-sub { font-size: 12px; }
}

/* ===== 通用按钮 ===== */
.btn {
  display: inline-block; border-radius: 3px; padding: 9px 28px; font-size: 14px;
  cursor: pointer; border: none; text-align: center;
}
.btn-green { background: var(--green); color: #fff; }
.btn-green:hover { background: var(--green-deep); }
.btn-gold { background: var(--gold); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--green); color: var(--green); }
.btn-block { display: block; width: 100%; }

/* ===== 表单 ===== */
.form-card {
  max-width: 380px; margin: 60px auto; background: #fff;
  border: 1px solid var(--line); border-radius: 4px; padding: 32px 32px 28px;
}
.form-card h2 { font-size: 19px; color: var(--green); margin-bottom: 4px; text-align: center; }
.form-card .sub { text-align: center; color: var(--gray); font-size: 12px; margin-bottom: 22px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; color: var(--gray); margin-bottom: 5px; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid #DDD8CC; border-radius: 3px;
  padding: 9px 12px; font-size: 13px; outline: none; font-family: inherit;
}
.field input:focus, .field select:focus { border-color: var(--green); }
.code-row { display: flex; gap: 8px; }
.code-row input { flex: 1; }
.code-btn {
  border: 1px solid var(--green); color: var(--green); background: #fff;
  border-radius: 3px; padding: 0 14px; font-size: 12px; cursor: pointer; white-space: nowrap;
}
.err-msg { color: var(--red); font-size: 12px; text-align: center; margin-bottom: 10px; }

/* ===== 课程详情 ===== */
.detail-top { display: flex; gap: 24px; padding: 28px 0; }
.detail-cover {
  width: 340px; min-height: 180px; background: var(--green); border-radius: 4px;
  padding: 24px; display: flex; flex-direction: column; justify-content: flex-end;
  background-size: cover; background-position: center;
}
.detail-cover .d-title {
  color: #fff; font-size: 22px; font-weight: 600;
  text-shadow: 0 1px 10px rgba(0,0,0,.45);
}
.detail-cover .d-sub {
  color: rgba(255,255,255,.9); font-size: 12px; margin-top: 8px;
  text-shadow: 0 1px 6px rgba(0,0,0,.4);
}
/* 有自定义封面：详情页左侧整图展示（标题在右侧信息区），无封面时用色块标题版 */
.detail-cover.has-img { padding: 0; min-height: 190px; }
.detail-info { flex: 1; }
.detail-info h1 { font-size: 24px; color: var(--green-deep); }
.d-tags { display: flex; gap: 8px; margin: 10px 0 14px; }
.d-tag {
  font-size: 11px; background: #fff; border: 1px solid var(--line);
  border-radius: 12px; padding: 3px 12px; color: var(--gray);
}
.d-tag.gold { color: var(--gold); border-color: var(--gold); }
.d-intro { color: var(--gray); font-size: 13px; }
.d-price-row { display: flex; align-items: center; gap: 18px; margin: 18px 0; }
.d-price { color: var(--gold); font-size: 30px; font-weight: 700; }
.chapter-list { background: #fff; border: 1px solid var(--line); border-radius: 4px; margin-bottom: 24px; }
.chapter-list h3 {
  padding: 14px 20px; font-size: 15px; color: var(--green);
  border-bottom: 1px solid var(--line);
}
.ch-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 11px 20px; border-bottom: .5px solid rgba(0,0,0,.04); font-size: 13px;
}
.ch-item:last-child { border-bottom: none; }
.ch-item .ch-name .seq-num { color: var(--gold); margin-right: 8px; font-weight: 600; }
.ch-item .ch-flag { font-size: 11px; color: var(--gold); border: .5px solid var(--gold); border-radius: 2px; padding: 1px 6px; }
.ch-item .ch-flag.locked { color: var(--gray); border-color: var(--line); }
.ch-item .ch-dur { color: var(--gray); font-size: 11px; margin-left: 10px; }

/* ===== 学习页 ===== */
.learn-wrap { display: flex; gap: 0; background: #fff; border-radius: 4px; border: 1px solid var(--line); margin: 20px 0; overflow: hidden; }
.learn-main { flex: 1; min-width: 0; padding: 20px; }
.learn-main h2 { font-size: 17px; color: var(--green-deep); margin-bottom: 14px; }
.video-box {
  width: 100%; aspect-ratio: 16/9; background: #000; border-radius: 3px;
  display: flex; align-items: center; justify-content: center; color: #fff;
  font-size: 14px; overflow: hidden;
}
.video-box video { width: 100%; height: 100%; }
.learn-side { width: 280px; border-left: 1px solid var(--line); overflow-y: auto; max-height: 520px; }
.learn-side .ls-title { padding: 14px 16px; font-weight: 600; font-size: 14px; color: var(--green); border-bottom: 1px solid var(--line); }
.ls-item { display: flex; align-items: center; gap: 8px; padding: 11px 16px; cursor: pointer; font-size: 13px; border-bottom: .5px solid rgba(0,0,0,.03); }
.ls-item.active { background: rgba(31,78,61,.06); color: var(--green); border-left: 3px solid var(--green); padding-left: 13px; }
.ls-item .st { font-size: 10px; border-radius: 2px; padding: 0 5px; }
.ls-item .st.free { color: var(--gold); border: .5px solid var(--gold); }
.ls-item .st.lock { color: var(--gray); border: .5px solid var(--line); }
.ls-item .st.done { color: #4A6B4A; border: .5px solid #4A6B4A; }
.ls-item .st.play { background: var(--green); color: #fff; }

/* ===== 个人中心 ===== */
.panel { background: #fff; border: 1px solid var(--line); border-radius: 4px; margin: 20px 0; }
.panel h3 { padding: 14px 20px; font-size: 15px; color: var(--green); border-bottom: 1px solid var(--line); }
.panel .p-body { padding: 16px 20px; }
.mini-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.mini-card { border: 1px solid var(--line); border-radius: 4px; padding: 14px; }
.mini-card .m-title { font-weight: 600; font-size: 14px; }
.mini-card .m-meta { color: var(--gray); font-size: 11px; margin-top: 6px; }
table.simple { width: 100%; border-collapse: collapse; font-size: 13px; }
table.simple th { text-align: left; color: var(--gray); font-weight: 500; font-size: 12px; padding: 8px; border-bottom: 1px solid var(--line); }
table.simple td { padding: 9px 8px; border-bottom: .5px solid rgba(0,0,0,.04); }

/* ===== 后台 ===== */
.admin-wrap { display: flex; gap: 0; margin: 20px 0; background: #fff; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.admin-side { width: 180px; background: var(--green-deep); padding: 16px 0; flex-shrink: 0; }
.admin-side a {
  display: block; padding: 10px 20px; color: rgba(255,255,255,.7); font-size: 13px;
}
.admin-side a.active, .admin-side a:hover { color: var(--gold); background: rgba(255,255,255,.06); }
.admin-main { flex: 1; padding: 20px; min-width: 0; }
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card { border: 1px solid var(--line); border-radius: 4px; padding: 16px; text-align: center; background: var(--cream); }
.stat-card .v { font-size: 24px; font-weight: 700; color: var(--green); }
.stat-card .k { font-size: 11px; color: var(--gray); margin-top: 4px; }

/* 消息提示 */
.toast {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%);
  background: var(--green-deep); color: #fff; padding: 10px 24px;
  border-radius: 3px; font-size: 13px; z-index: 999; display: none;
}
.toast.show { display: block; }

.empty { text-align: center; color: var(--gray); padding: 40px 0; font-size: 13px; }

/* ===== 图文课正文 ===== */
.article-body {
  background: #fff; border: 1px solid var(--line); border-radius: 4px;
  padding: 34px 38px; font-size: 15px; line-height: 1.9; color: #333;
}
.article-body h1, .article-body h2, .article-body h3 {
  color: var(--green-deep); margin: 22px 0 12px; font-weight: 600;
}
.article-body h3 { font-size: 18px; border-left: 3px solid var(--gold); padding-left: 10px; }
.article-body p { margin: 10px 0; }
.article-body img { max-width: 100%; border-radius: 3px; margin: 12px 0; }
.article-body ul, .article-body ol { margin: 10px 0 10px 24px; }
.article-body li { margin: 5px 0; }
.article-body blockquote {
  border-left: 3px solid var(--green); background: rgba(31,78,61,.05);
  padding: 10px 16px; margin: 12px 0; color: var(--gray);
}
.article-body strong { color: var(--green-deep); }
.article-body table { border-collapse: collapse; width: 100%; margin: 12px 0; }
.article-body td, .article-body th { border: 1px solid var(--line); padding: 8px 10px; font-size: 13px; }
.article-nav {
  display: flex; justify-content: space-between; margin-top: 16px; gap: 12px;
}
.article-nav a {
  border: 1px solid var(--line); background: #fff; border-radius: 3px;
  padding: 7px 16px; font-size: 13px; color: var(--green);
}
.article-nav a:hover { border-color: var(--green); }

/* 后台富文本工具栏 */
.rt-toolbar { display: flex; gap: 4px; border: 1px solid #DDD8CC; border-bottom: none; border-radius: 3px 3px 0 0; padding: 5px 8px; background: var(--cream); flex-wrap: wrap; }
.rt-toolbar button {
  border: none; background: transparent; cursor: pointer; font-size: 13px;
  padding: 2px 8px; color: #444; font-family: inherit;
}
.rt-toolbar button:hover { background: rgba(31,78,61,.1); border-radius: 2px; }
.rt-area {
  width: 100%; min-height: 180px; border: 1px solid #DDD8CC; border-radius: 0 0 3px 3px;
  padding: 12px; font-size: 13px; outline: none; background: #fff; line-height: 1.7;
}
.rt-area:focus { border-color: var(--green); }

/* 上传按钮组 */
.upload-row { display: flex; gap: 8px; align-items: center; }
.up-btn {
  border: 1px solid var(--green); color: var(--green); background: #fff;
  border-radius: 3px; padding: 5px 12px; font-size: 12px; cursor: pointer;
  white-space: nowrap;
}
.up-btn:hover { background: rgba(31,78,61,.06); }
.up-hint { font-size: 11px; color: var(--gray); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 220px; }
.cover-preview { width: 90px; height: 52px; border-radius: 3px; object-fit: cover; border: 1px solid var(--line); display: none; }
.up-loading { font-size: 11px; color: var(--gold); }

/* ===== 前台第二批：年度学习卡营销位 ===== */
.yc-band {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  background: linear-gradient(135deg, #16382C 0%, #1F4E3D 100%);
  border-radius: 6px; padding: 22px 28px; margin: 0 0 8px;
  position: relative; overflow: hidden; flex-wrap: wrap;
}
.yc-band::before {
  content: ''; position: absolute; right: -50px; top: -50px;
  width: 180px; height: 180px; border-radius: 50%;
  background: rgba(200,145,42,.12);
}
.yc-band::after {
  content: '¥'; position: absolute; right: 18px; top: -18px;
  font-size: 110px; font-weight: 700; color: rgba(255,255,255,.04);
}
.yc-main { position: relative; z-index: 2; min-width: 0; }
.yc-tag {
  display: inline-block; color: var(--gold); font-size: 11px; letter-spacing: 2px;
  border: .5px solid var(--gold); border-radius: 2px; padding: 1px 8px;
}
.yc-slogan { color: #fff; font-size: 21px; font-weight: 700; margin-top: 8px; letter-spacing: .5px; }
.yc-slogan b { color: #E9C878; }
.yc-sub { color: rgba(255,255,255,.65); font-size: 12px; margin-top: 5px; }
.yc-points { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 11px; }
.yc-points span {
  color: rgba(255,255,255,.85); font-size: 11.5px; display: flex; align-items: center; gap: 5px;
}
.yc-points span::before {
  content: '✓'; color: var(--gold); font-weight: 700;
}
.yc-side {
  position: relative; z-index: 2; display: flex; flex-direction: column;
  align-items: flex-end; gap: 10px; flex-shrink: 0;
}
.yc-price { color: #E9C878; font-size: 34px; font-weight: 700; line-height: 1; }
.yc-price em { font-style: normal; font-size: 13px; color: rgba(255,255,255,.6); font-weight: 400; margin-left: 3px; }
.yc-btns { display: flex; gap: 10px; }
.btn-plain {
  border: 1px solid rgba(255,255,255,.55); color: rgba(255,255,255,.92);
  background: transparent; border-radius: 3px; padding: 9px 20px; font-size: 13px;
  cursor: pointer; text-align: center; display: inline-block;
}
.btn-plain:hover { border-color: var(--gold); color: var(--gold); }
@media (max-width: 720px) {
  .yc-band { padding: 18px 20px; }
  .yc-slogan { font-size: 18px; }
  .yc-side { flex-direction: row; align-items: center; width: 100%; justify-content: space-between; }
}

/* ===== 前台第二批：信任区 ===== */
.trust { margin: 14px 0 6px; }
.trust-title {
  text-align: center; color: #16382C; font-size: 17px; font-weight: 700;
  letter-spacing: 1px; padding: 18px 0 14px;
}
.trust-title::before, .trust-title::after {
  content: ''; display: inline-block; width: 26px; height: 1px;
  background: var(--gold); vertical-align: middle; margin: 0 12px;
}
.trust-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
}
@media (max-width: 760px) { .trust-row { grid-template-columns: 1fr; } }
.trust-item {
  background: #fff; border: 1px solid var(--line); border-radius: 4px;
  padding: 18px 20px;
}
.t-no {
  color: var(--gold); font-size: 12px; font-weight: 700; letter-spacing: 1px;
}
.t-no::after {
  content: ''; display: block; width: 20px; height: 2px;
  background: var(--gold); margin-top: 7px;
}
.t-title { color: #16382C; font-size: 15px; font-weight: 600; margin-top: 10px; }
.t-desc { color: var(--gray); font-size: 12px; line-height: 1.7; margin-top: 7px; }
.trust-foot {
  text-align: center; color: #999; font-size: 11px; padding: 16px 0 4px;
}
.trust-foot b { color: var(--green); }