/* ==========================================================================
   第15次口腔药学学术会议 · 全站样式
   设计基调：正式学术版面
   —— 深蓝（正文/标题） + 典金（点缀） + 细分隔线，扁平排版、无浮夸阴影
   ========================================================================== */

:root{
  --navy:        #14406e;   /* 主色：深蓝 */
  --navy-deep:   #0b2a48;   /* 标题：近墨蓝 */
  --navy-text:   #1b4d80;   /* 链接蓝 */
  --gold:        #a8802f;   /* 点缀：典金 */
  --gold-soft:   #d8c091;   /* 点缀：浅金 */
  --gold-tint:   #fdfaf3;   /* 点缀：极浅金底 */
  --ink:         #2a333d;   /* 正文 */
  --muted:       #6d7884;   /* 次要文字 */
  --line:        #e3e7ec;   /* 细线 */
  --surface:     #f7f9fb;   /* 浅底 */
  --num: Georgia,"Times New Roman","Songti SC",serif;  /* 数字用衬线，更有版面感 */
  --sans: "PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",
          -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}

*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}

body{
  margin:0;
  background:#fff;
  color:var(--ink);
  font-family:var(--sans);
  font-size:15px;
  line-height:1.95;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--navy-text);text-decoration:none;}
img{max-width:100%;display:block;}

/* ---------------------------------------------------------------- 顶部导航 */
.navbar{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(255,255,255,.95);
  backdrop-filter:saturate(150%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
  height:70px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
}
.brand{
  display:flex;
  flex-direction:column;
  gap:1px;
  color:var(--navy-deep);
  font-size:16px;
  font-weight:700;
  letter-spacing:1.5px;
  line-height:1.35;
}
.brand small{
  font-size:11px;
  font-weight:400;
  letter-spacing:2.5px;
  color:var(--muted);
}
.brand:hover{color:var(--navy-deep);}

.nav-links{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.nav-links a{
  font-size:14px;
  letter-spacing:2px;
  color:#4c5866;
  padding:4px 0;
  border-bottom:2px solid transparent;
  transition:color .18s,border-color .18s;
}
.nav-links a:hover{color:var(--navy);}
.nav-links a.active{
  color:var(--navy-deep);
  font-weight:600;
  border-bottom-color:var(--gold);
}

/* 注册入口：与导航同色系的小实心按钮（选择器带上 .nav-links 以覆盖链接样式） */
.nav-links a.nav-cta{
  padding:8px 22px;
  border:1px solid var(--navy);
  border-bottom-color:var(--navy);
  border-radius:2px;
  background:var(--navy);
  color:#fff;
  font-size:13px;
  font-weight:600;
  letter-spacing:3px;
  text-indent:3px;
  transition:background .18s,border-color .18s;
}
.nav-links a.nav-cta:hover,
.nav-links a.nav-cta.active{
  background:var(--navy-deep);
  border-color:var(--navy-deep);
  color:#fff;
}

/* -------------------------------------------------------------------- 横幅 */
.hero{
  position:relative;
  padding:94px 24px 120px;
  text-align:center;
  background:#eef4f9 url("images/hero-bg.png") center bottom / cover no-repeat;
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,
              #fff 0%,
              rgba(255,255,255,.9) 40%,
              rgba(255,255,255,.64) 68%,
              rgba(255,255,255,.1) 100%);
}
.hero > *{position:relative;z-index:1;}

.hero .org{
  font-size:15px;
  font-weight:600;
  letter-spacing:7px;
  color:#3d6c96;
  text-indent:7px;
}
.hero h1{
  margin:16px 0 0;
  font-size:50px;
  font-weight:800;
  line-height:1.34;
  letter-spacing:6px;
  text-indent:6px;
  color:var(--navy-deep);
  text-shadow:none;
  filter:none;
}
.h1-num{color:var(--gold);}

.hero .title-rule{
  position:relative;
  width:64px;
  height:1px;
  margin:20px auto 22px;
  background:var(--gold-soft);
}
.hero .title-rule::before{
  content:"";
  position:absolute;
  left:50%;
  top:-2px;
  width:5px;
  height:5px;
  margin-left:-2.5px;
  background:var(--gold);
  transform:rotate(45deg);
}
.hero .sub{
  font-size:16px;
  font-weight:500;
  letter-spacing:8px;
  text-indent:8px;
  color:#4a6d90;
}

/* 子页横幅 */
.page-hero{
  position:relative;
  padding:60px 24px 72px;
  text-align:center;
  background:#eef4f9 url("images/hero-bg.png") center bottom / cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,
              #fff 0%,
              rgba(255,255,255,.92) 46%,
              rgba(255,255,255,.7) 74%,
              rgba(255,255,255,.18) 100%);
}
.page-hero > *{position:relative;z-index:1;}
.page-hero h1{
  margin:0;
  font-size:26px;
  font-weight:700;
  letter-spacing:10px;
  text-indent:10px;
  color:var(--navy-deep);
  text-shadow:none;
}
.page-hero p{
  margin:10px 0 0;
  font-size:12px;
  letter-spacing:6px;
  text-indent:6px;
  text-transform:uppercase;
  color:#557da3;
}

/* ---------------------------------------------------------------- 内容区 */
/* ------------------------------------- 通用简洁表格（重要日期等，两列/三列） */
.plain-table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
}
.plain-table th,
.plain-table td{
  padding:14px 18px;
  border:1px solid var(--line);
  text-align:left;
  vertical-align:middle;
}
.plain-table thead th{
  background:var(--surface);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:2px;
  color:#55616e;
  white-space:nowrap;
}
.plain-table td.d{
  font-family:var(--num);
  font-size:15px;
  font-weight:700;
  letter-spacing:.5px;
  color:var(--navy);
  white-space:nowrap;
}
.plain-table td a{
  color:var(--navy);
  border-bottom:1px solid var(--gold-soft);
  padding-bottom:1px;
  transition:color .18s,border-color .18s;
}
.plain-table td a:hover{color:var(--gold);border-bottom-color:var(--gold);}
.plain-table tbody tr:hover td{background:#fbfcfe;}

.container{
  max-width:1000px;
  margin:0 auto;
  padding:56px 24px 84px;
}

.card{
  padding:0;
  margin:0 0 58px;
  background:none;
  border:0;
  box-shadow:none;
}
.card:last-child{margin-bottom:0;}

.card h2{
  position:relative;
  margin:0 0 26px;
  padding-bottom:14px;
  font-size:19px;
  font-weight:700;
  letter-spacing:3px;
  color:var(--navy-deep);
  border-bottom:1px solid var(--line);
}
.card h2::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  width:56px;
  height:2px;
  background:var(--navy);
}
.card p{margin:0 0 24px;color:#3b4550;}
.card p:last-child{margin-bottom:0;}

/* 会议信息条：上下细线 + 竖分隔，正式版面常见的条状信息栏 */
.info-strip{
  display:flex;
  flex-wrap:wrap;
  margin:0 0 52px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.info-strip .cell{
  flex:1 1 240px;
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:18px 22px;
  border-right:1px solid var(--line);
}
.info-strip .cell:last-child{border-right:0;}
.info-strip .k{
  font-size:12px;
  letter-spacing:3px;
  color:var(--gold);
  white-space:nowrap;
}
.info-strip .v{
  font-size:14.5px;
  letter-spacing:.5px;
  color:var(--navy-deep);
}

/* 议题标签：直角、细线、浅底，不用胶囊圆角 */
.topics{display:flex;flex-wrap:wrap;gap:10px;margin:0;}
.topic{
  padding:7px 16px;
  font-size:13px;
  letter-spacing:1.5px;
  color:#33526f;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:0;
}

/* ------------------------------------------------------------------ 步骤 */
.steps{
  counter-reset:step;
  list-style:none;
  margin:0;
  padding:0;
}
.steps li{
  counter-increment:step;
  position:relative;
  padding:20px 0 20px 64px;
  border-top:1px solid var(--line);
}
.steps li:last-child{border-bottom:1px solid var(--line);}
.steps li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;
  left:0;
  top:21px;
  font-family:var(--num);
  font-size:17px;
  font-weight:700;
  letter-spacing:1px;
  color:var(--gold);
}
.st-title{
  font-size:15.5px;
  font-weight:600;
  letter-spacing:.5px;
  color:var(--navy-deep);
}
.st-desc{
  margin-top:2px;
  font-size:13.5px;
  line-height:1.8;
  color:var(--muted);
}

/* -------------------------------------------------------------- 费用表格 */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.fee-table{
  width:100%;
  min-width:660px;
  border-collapse:collapse;
  font-size:14px;
}
.fee-table caption{
  caption-side:top;
  padding:0 0 16px;
  text-align:left;
}
.fee-table .cap-name{
  display:block;
  font-size:15px;
  font-weight:600;
  letter-spacing:.5px;
  color:var(--navy-deep);
}
.fee-table .cap-meta{
  display:block;
  margin-top:4px;
  font-size:12.5px;
  letter-spacing:1.5px;
  color:var(--muted);
}
.fee-table th,
.fee-table td{
  padding:15px 18px;
  border:1px solid var(--line);
  text-align:left;
  vertical-align:middle;
}
.fee-table thead th{
  background:var(--surface);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:2px;
  color:#55616e;
  white-space:nowrap;
}
.fee-table tbody th{
  position:relative;
  padding-right:56px;
  font-weight:600;
  letter-spacing:1px;
  color:var(--navy-deep);
  white-space:nowrap;
  background:#fff;
}
.fee-table td.dur{
  font-family:var(--num);
  font-size:13.5px;
  letter-spacing:.5px;
  color:#4a5561;
  white-space:nowrap;
}
/* 行标题下的付费时段（衬线小字） */
.fee-table tbody th em.row-dur{
  display:block;
  margin-top:3px;
  font-family:var(--num);
  font-size:12.5px;
  font-style:normal;
  font-weight:400;
  letter-spacing:.5px;
  color:var(--muted);
}
.fee-table td.num{
  font-family:var(--num);
  font-size:22px;
  font-weight:700;
  letter-spacing:.5px;
  color:var(--navy);
  text-align:right;
  white-space:nowrap;
}
.fee-table td.num em{
  font-family:var(--sans);
  font-size:12px;
  font-style:normal;
  font-weight:400;
  color:var(--muted);
  margin-left:4px;
}
.fee-table td.act{width:1%;white-space:nowrap;}
.fee-table tr.early th,
.fee-table tr.early td{background:var(--gold-tint);}
.fee-table tr.early th::after{
  content:"早";
  position:absolute;
  top:15px;
  right:18px;
  padding:1px 6px;
  font-size:11px;
  font-weight:400;
  letter-spacing:1px;
  color:var(--gold);
  border:1px solid var(--gold-soft);
}
.fee-table tbody tr:hover td,
.fee-table tbody tr:hover th{background:#fbfcfe;}
.fee-table tbody tr.early:hover td,
.fee-table tbody tr.early:hover th{background:#fcf8ef;}

.tbl-link{
  font-size:12.5px;
  letter-spacing:2px;
  color:var(--navy);
  border-bottom:1px solid var(--gold-soft);
  padding-bottom:1px;
  transition:color .18s,border-color .18s;
}
.tbl-link:hover{color:var(--gold);border-bottom-color:var(--gold);}

.foot-note{
  margin:16px 0 0;
  font-size:12.5px;
  letter-spacing:.5px;
  color:#98a2ad;
}

/* -------------------------------------------------------------- 日程议程 */
.agenda{list-style:none;margin:0;padding:0;}
.agenda li{
  display:flex;
  gap:30px;
  padding:20px 0;
  border-top:1px solid var(--line);
}
.agenda li:last-child{border-bottom:1px solid var(--line);}
.agenda .day{
  flex:0 0 128px;
  font-family:var(--num);
  font-size:15px;
  font-weight:700;
  letter-spacing:.5px;
  color:var(--navy-deep);
  white-space:nowrap;
}
.agenda .day small{
  display:block;
  margin-top:1px;
  font-family:var(--sans);
  font-size:12px;
  font-weight:400;
  letter-spacing:2px;
  color:var(--gold);
}
.agenda .body{flex:1 1 auto;min-width:0;}
.agenda .ev{
  font-size:15.5px;
  font-weight:600;
  letter-spacing:.5px;
  color:var(--navy-deep);
}
.agenda .loc{
  margin-top:3px;
  font-size:13.5px;
  line-height:1.8;
  color:var(--muted);
}

/* --------------------------------------------------- 联系信息（标签+内容） */
.contact-list{list-style:none;margin:0;padding:0;}
.contact-list li{
  display:flex;
  flex-wrap:wrap;
  gap:4px 16px;
  padding:15px 0;
  border-top:1px solid var(--line);
  font-size:14px;
}
.contact-list li:last-child{border-bottom:1px solid var(--line);}
.contact-list .k{
  flex:0 0 104px;
  font-size:12.5px;
  letter-spacing:2px;
  line-height:2.1;
  color:var(--gold);
}
.contact-list .v{flex:1 1 280px;line-height:1.9;color:#3b4550;}
.contact-list .v span{white-space:nowrap;}

/* ------------------------------------------------------------------ 提示框 */
.notice-box{
  padding:20px 24px;
  background:var(--gold-tint);
  border:1px solid var(--gold-soft);
  font-size:14px;
  line-height:2;
  color:#4a4131;
}
.notice-box strong{font-weight:600;color:#6d5620;}

/* 强调（截止日期等） */
.hl{color:var(--gold);font-weight:600;}

/* 条款式说明：1. 2. 3. */
.clauses{
  counter-reset:clause;
  list-style:none;
  margin:0;
  padding:0;
}
.clauses li{
  counter-increment:clause;
  position:relative;
  padding:14px 0 14px 34px;
  border-top:1px solid var(--line);
  font-size:13.8px;
  line-height:1.95;
  color:#3b4550;
}
.clauses li:last-child{border-bottom:1px solid var(--line);}
.clauses li::before{
  content:counter(clause)".";
  position:absolute;
  left:4px;
  font-family:var(--num);
  font-size:13px;
  color:var(--gold);
}

/* ------------------------------------------------------------------ 按钮 */
.btn-row{margin:30px 0 0;}
.btn-row.center{text-align:center;}

.btn-register{
  display:inline-block;
  padding:15px 52px;
  border:1px solid var(--navy);
  border-radius:2px;
  background:var(--navy);
  color:#fff;
  font-size:15px;
  font-weight:600;
  letter-spacing:6px;
  text-indent:6px;
  box-shadow:none;
  transition:background .18s,border-color .18s;
}
.btn-register:hover{
  background:var(--navy-deep);
  border-color:var(--navy-deep);
  color:#fff;
}

/* ------------------------------------------------------------------ 页脚 */
footer{
  padding:26px 24px;
  text-align:center;
  font-size:12px;
  letter-spacing:2.5px;
  line-height:1.9;
  color:rgba(255,255,255,.62);
  background:var(--navy-deep);
  border-top:2px solid var(--gold);
}

/* ------------------------------------------------------------------ 响应 */
@media (max-width:1080px){
  .nav-inner{height:auto;min-height:70px;padding:12px 22px;flex-wrap:wrap;gap:10px 20px;}
  .brand{font-size:15px;}
  .nav-links{gap:18px;}
  .nav-links a{font-size:13.5px;letter-spacing:1px;}
  .nav-links a.nav-cta{padding:7px 18px;letter-spacing:2px;text-indent:2px;}
}

@media (max-width:900px){
  .hero{padding:72px 20px 96px;}
  .hero h1{font-size:40px;letter-spacing:4px;text-indent:4px;}
  .hero .org{font-size:13.5px;letter-spacing:5px;text-indent:5px;}
  .hero .sub{font-size:14px;letter-spacing:5px;text-indent:5px;}
  .page-hero h1{font-size:22px;letter-spacing:6px;text-indent:6px;}
  .container{padding:44px 20px 68px;}
}

@media (max-width:640px){
  body{font-size:14.5px;}
  .nav-inner{height:auto;padding:10px 16px;flex-wrap:wrap;gap:6px 14px;}
  .brand{font-size:14px;letter-spacing:1px;}
  .brand small{display:none;}
  .nav-links{gap:16px;}
  .nav-links a{font-size:13px;letter-spacing:2px;}
  .nav-links a.nav-cta{padding:6px 16px;letter-spacing:2px;text-indent:2px;}

  .hero{padding:54px 18px 76px;}
  .hero h1{font-size:27px;letter-spacing:2.5px;text-indent:2.5px;}
  .hero .org{font-size:12px;letter-spacing:3px;text-indent:3px;}
  .hero .sub{font-size:12.5px;letter-spacing:3px;text-indent:3px;}
  .page-hero{padding:44px 18px 56px;}
  .page-hero h1{font-size:19px;letter-spacing:4px;text-indent:4px;}

  .container{padding:38px 18px 56px;}
  .info-strip{margin-bottom:40px;}
  .info-strip .cell{flex:1 1 100%;padding:14px 2px;border-right:0;border-bottom:1px solid var(--line);}
  .info-strip .cell:last-child{border-bottom:0;}
  .card{margin-bottom:44px;}
  .card h2{font-size:17px;letter-spacing:2px;}
  .steps li{padding:17px 0 17px 50px;}
  .steps li::before{top:18px;font-size:15px;}

  .agenda li{flex-wrap:wrap;gap:4px;padding:17px 0;}
  .agenda .day{flex:1 1 100%;}
  .contact-list .k{flex:1 1 100%;line-height:1.6;}
  .notice-box{padding:16px 18px;font-size:13.5px;}

  .btn-row{margin-top:26px;}
  .btn-register{display:block;width:100%;padding:14px 0;text-align:center;letter-spacing:5px;text-indent:5px;}
  footer{letter-spacing:1.5px;}
}