/* ============================================================
   澜湄旅游城市合作联盟 · 全站基础样式 base.css
   ------------------------------------------------------------
   分区：1 令牌  2 基础  3 容器  4 动效/公共件  5 导航
        6 内页 Banner（紧凑式 / 照片式）  7 板块  8 按钮与标签
        9 页脚  10 公共响应式  11 无障碍  12 列表页公共件
   页面特有样式写在各页 <style> 中（须在引入本文件之后）。
   修改公共样式只改此文件，禁止在页面内覆盖公共段的数值。
   ============================================================ */

/* ---------- 1 令牌 ---------- */
:root{
  --teal:#0F8474;
  --teal-deep:#0A5F54;
  --teal-dark:#07332C;
  --teal-night:#06231E;
  --teal-bright:#2FC4B2;
  --teal-soft:#86DECF;
  --paper:#f7f8fa;
  --ink:#0B3B33;
  --container:1400px;
  --gap:32px;
  --radius-sm:14px;
  --radius-md:20px;
  --radius-lg:24px;
  --shadow-1:0 20px 44px -30px rgba(16,42,38,.28);
  --shadow-2:0 40px 76px -30px rgba(15,132,116,.45);
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- 2 基础 ---------- */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--paper);color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--teal);color:#fff}
img{display:block;max-width:100%}
section{scroll-margin-top:92px}

/* ---------- 3 容器 ---------- */
.wrap{max-width:var(--container);margin:0 auto;padding:0 48px}

/* ---------- 4 动效 / 公共件 ---------- */
.rv{opacity:0;translate:0 34px;transition:opacity .8s ease,translate .8s var(--ease);transition-delay:var(--d,0s)}
.rv.in-view{opacity:1;translate:0 0}
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--teal),var(--teal-bright))}
.to-top{position:fixed;right:30px;bottom:30px;z-index:45;width:52px;height:52px;border-radius:50%;
  background:#fff;border:1px solid rgba(15,132,116,.25);color:var(--teal);font-size:17px;cursor:pointer;
  box-shadow:0 14px 30px -14px rgba(16,42,38,.45);opacity:0;translate:0 14px;pointer-events:none;
  transition:opacity .3s,translate .3s,background .3s,color .3s}
.to-top.show{opacity:1;translate:0 0;pointer-events:auto}
.to-top:hover{background:var(--teal);color:#fff}

/* ---------- 5 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto;z-index:50;
  padding:18px 0;color:#fff;
  transition:background .4s ease,box-shadow .4s ease,padding .4s ease;
}
.nav.scrolled{
  background:rgba(7,51,44,.94);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  box-shadow:0 10px 40px -14px rgba(0,0,0,.4);
  padding:12px 0;
}
.nav-in{max-width:var(--container);margin:0 auto;padding:0 48px;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;text-decoration:none;margin-right:auto}
.brand img{height:52px;width:auto;transition:height .4s ease}
.nav.scrolled .brand img{height:46px}
.links{display:flex;gap:6px}
.links a{
  color:rgba(255,255,255,.85);text-decoration:none;font-size:16px;
  padding:9px 17px;border-radius:999px;transition:background .3s,color .3s;
}
.links a:hover,.links a.on{background:rgba(255,255,255,.14);color:#fff}
.lang{
  font-size:15px;padding:9px 18px;border-radius:999px;
  border:1px solid rgba(255,255,255,.35);white-space:nowrap;
}

/* ---------- 6 内页 Banner ---------- */
/* 紧凑式（默认）：kick + h1 + .en + p，高度由内边距决定 */
.page-hero{position:relative;overflow:hidden;color:#fff;background:var(--teal-dark)}
.page-hero::before{
  content:'';position:absolute;inset:-12%;
  background:
    radial-gradient(36% 52% at 14% 24%,rgba(47,196,178,.34),transparent),
    radial-gradient(32% 48% at 84% 16%,rgba(15,132,116,.45),transparent),
    radial-gradient(38% 52% at 78% 86%,rgba(6,49,43,.9),transparent),
    radial-gradient(26% 40% at 26% 88%,rgba(134,222,207,.18),transparent);
  animation:meshMove 14s ease-in-out infinite alternate;
}
@keyframes meshMove{from{transform:translate(0,0) scale(1)}to{transform:translate(3%,-3%) scale(1.14)}}
@keyframes dotDrift{to{background-position:140px 84px}}
.ph-deco{position:absolute;right:7%;top:50%;translate:0 -50%;width:200px;height:200px;
  border:1.5px solid rgba(134,222,207,.22);transform:rotate(45deg);z-index:1;pointer-events:none}
.ph-deco::before{content:'';position:absolute;inset:26px;border:1px solid rgba(47,196,178,.28)}
.ph-deco::after{content:'';position:absolute;inset:82px;background:var(--teal-bright);opacity:.45}
.ph-in{position:relative;z-index:1;max-width:var(--container);margin:0 auto;padding:146px 48px 96px}
.kick{display:inline-flex;align-items:center;gap:14px;font-family:ui-monospace,Menlo,monospace;
  font-size:12.5px;letter-spacing:.42em;color:var(--teal)}
.kick::before{content:'';width:34px;height:1px;background:var(--teal)}
.page-hero .kick{color:rgba(255,255,255,.82)}
.page-hero .kick::before{background:rgba(255,255,255,.45)}
.page-hero h1{font-size:clamp(32px,3.8vw,50px);font-weight:800;letter-spacing:.04em;margin:16px 0 0;
  text-shadow:0 6px 40px rgba(0,0,0,.3)}
.page-hero .en{display:block;font-family:ui-monospace,Menlo,monospace;font-size:13px;letter-spacing:.3em;
  color:rgba(255,255,255,.55);text-transform:uppercase;margin-top:12px}
.page-hero p{font-size:16px;line-height:1.9;color:rgba(255,255,255,.75);max-width:620px;margin-top:16px}
.page-hero .hero-wave{position:absolute;bottom:-1px;left:0;width:100%;height:80px;z-index:2;pointer-events:none}

/* 照片式变体（大图活动页）：加 page-hero--photo */
.page-hero--photo{min-height:68vh;display:flex}
.page-hero--photo .ph-in{width:100%;display:flex;flex-direction:column;justify-content:center;
  padding:132px 48px 96px}
.page-hero--photo .kick{margin-top:18px}
.page-hero--photo h1{font-size:clamp(44px,5vw,78px);line-height:1.15;text-shadow:0 6px 40px rgba(0,0,0,.4)}
.ph-photo{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;animation:heroZoom 12s ease-out forwards}
@keyframes heroZoom{from{transform:scale(1.14)}to{transform:scale(1)}}
.ph-veil{position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,51,44,.7),rgba(7,51,44,.34) 46%,rgba(6,35,30,.88)),
             radial-gradient(1100px circle at 84% 14%,rgba(15,132,116,.34),transparent 62%);
}

/* ---------- 7 板块 ---------- */
.sec{padding:120px 0}
.band-white{background:#fff;border-block:1px solid rgba(15,132,116,.1)}
.sec-head{position:relative;max-width:820px;margin-bottom:56px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .kick{justify-content:center}
.sec-head.center .kick::before{display:none}
.sec-head h2{font-size:clamp(30px,3.4vw,46px);font-weight:800;letter-spacing:.03em;margin:16px 0 12px}
.sec-head p{font-size:16.5px;line-height:1.9;opacity:.72}

/* ---------- 8 按钮与标签 ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;padding:15px 36px;border-radius:999px;
  font-size:16px;text-decoration:none;transition:transform .3s,box-shadow .3s,background .3s}
.btn.pri{background:var(--teal-bright);color:var(--teal-night);font-weight:700}
.btn.pri:hover{transform:translateY(-3px);box-shadow:0 18px 40px -12px rgba(47,196,178,.55)}
.btn.gho{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn.gho:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}
.tagchip{display:inline-block;font-size:12.5px;letter-spacing:.16em;color:var(--teal);
  background:rgba(15,132,116,.1);border-radius:999px;padding:6px 15px}
.tabs{display:flex;gap:12px;flex-wrap:wrap}
.tab{
  padding:10px 24px;border-radius:999px;font-size:15px;cursor:pointer;
  border:1px solid rgba(15,132,116,.3);color:var(--teal);background:transparent;
  transition:background .3s,color .3s,border-color .3s;
}
.tab:hover{background:rgba(15,132,116,.1)}
.tab.on{background:var(--teal);color:#fff;border-color:var(--teal)}
.morelink{font-size:15px;color:var(--teal);text-decoration:none;font-weight:700;letter-spacing:.05em}
.morelink .arr{display:inline-block;transition:translate .3s ease}

/* 下拉框：统一自定义箭头（替代原生小箭头；页面内 select 规则需用 background-color 而非 background 简写，避免覆盖箭头图） */
select{
  -webkit-appearance:none;appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath d='M1.5 1.5l5.5 5.5 5.5-5.5' fill='none' stroke='%230F8474' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 20px center;
  padding-right:46px;
}

/* ---------- 9 页脚 ---------- */
footer{background:var(--teal-dark);color:#fff}
.f-top{
  max-width:var(--container);margin:0 auto;padding:100px 48px 60px;
  display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:64px;
}
.f-brand img{height:52px;margin-bottom:24px}
.f-brand p{font-size:16px;line-height:2.1;color:rgba(255,255,255,.6)}
.f-brand .motto{color:var(--teal-soft);font-size:17px;letter-spacing:.24em;margin-bottom:10px}
footer h5{font-size:16px;letter-spacing:.16em;margin-bottom:22px;color:var(--teal-soft)}
.f-links{list-style:none;display:flex;flex-direction:column;gap:13px}
.f-links a{color:rgba(255,255,255,.68);text-decoration:none;font-size:15px;transition:color .3s,translate .3s;display:inline-block}
.f-links a:hover{color:#fff;translate:4px 0}
.f-social{display:flex;gap:13px}
.f-social span{
  width:46px;height:46px;border-radius:50%;border:1px solid rgba(255,255,255,.3);
  display:flex;align-items:center;justify-content:center;font-size:13px;
  transition:background .3s,transform .3s;
}
.f-social span:hover{background:var(--teal);transform:translateY(-4px)}
.f-addr{font-size:15px;line-height:2.1;color:rgba(255,255,255,.68)}
.f-bar{
  border-top:1px solid rgba(255,255,255,.12);
  text-align:center;padding:24px 24px;font-size:13px;color:rgba(255,255,255,.5);letter-spacing:.06em;
}

/* ---------- 10 公共响应式 ---------- */
@media (max-width:1200px){
  .wrap,.nav-in,.ph-in{padding-left:36px;padding-right:36px}
  .links{display:none}
}
@media (max-width:640px){
  .wrap,.nav-in{padding-left:22px;padding-right:22px}
  .ph-in{padding-left:22px;padding-right:22px;padding-top:136px;padding-bottom:64px}
  .page-hero--photo .ph-in{padding-top:112px}
  .sec{padding:72px 0}
  .f-top{grid-template-columns:1fr;gap:44px;padding:72px 22px 48px}
}

/* ---------- 11 无障碍 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
}

/* ---------- 12 列表页公共件（列表头/侧栏/分页/空态/侧栏搜索与筛选） ----------
   各列表页不得重复定义以下组件；页面仅在 <style> 中写自身专属规则。
   侧栏响应式回退（≤1200px 转 static）由各页按自身布局在媒体查询中处理。 */
.list-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:26px}
.count{font-family:ui-monospace,Menlo,monospace;font-size:13px;letter-spacing:.14em;color:rgba(11,59,51,.5)}
.pager{display:flex;justify-content:center;gap:10px;margin-top:52px;flex-wrap:wrap}
.pager a{min-width:46px;height:46px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;border:1.5px solid rgba(15,132,116,.3);color:var(--teal);
  font-size:15px;text-decoration:none;transition:background .3s,color .3s,border-color .3s,transform .3s}
.pager a:hover{background:rgba(15,132,116,.1);transform:translateY(-3px)}
.pager a.on{background:var(--teal);border-color:var(--teal);color:#fff;font-weight:700;pointer-events:none}
.empty-tip{display:none;text-align:center;padding:56px 0;font-size:16px;color:rgba(11,59,51,.5)}
.aside{position:sticky;top:104px;display:flex;flex-direction:column;gap:22px}
.scard{background:#fff;border:1px solid rgba(15,132,116,.12);border-radius:20px;padding:30px;
  box-shadow:var(--shadow-1)}
.scard .kick{color:var(--teal)}
.scard .kick::before{background:var(--teal)}
.scard h4{font-size:17px;font-weight:800;letter-spacing:.06em;margin:14px 0 6px}
.search{display:flex;gap:10px;margin-top:14px}
.search input{flex:1;min-width:0;border:1.5px solid rgba(15,132,116,.3);border-radius:999px;
  padding:12px 20px;font-size:16px;color:var(--ink);background-color:#fff;outline:none;font-family:inherit;
  transition:border-color .3s,box-shadow .3s}
.search input::placeholder{color:rgba(11,59,51,.4)}
.search input:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(15,132,116,.12)}
.fgrid{display:grid;grid-template-columns:1fr;gap:10px;margin-top:14px}
.fgrid select{width:100%;border:1.5px solid rgba(15,132,116,.3);border-radius:999px;
  padding:11px 46px 11px 18px;font-size:16px;color:var(--ink);background-color:#fff;outline:none;font-family:inherit;
  transition:border-color .3s,box-shadow .3s}
.sbtn{width:100%;margin-top:14px;border:1.5px solid var(--teal);background:transparent;
  color:var(--teal);cursor:pointer;border-radius:999px;padding:12px 24px;
  font-size:15px;font-weight:700;letter-spacing:.14em;font-family:inherit;
  transition:background .3s,color .3s,transform .3s}
.sbtn:hover{background:var(--teal);color:#fff;transform:translateY(-2px)}

/* ---------- 13 滚动加载动画（参考 animate/：slide/curtain/flip-x/flip-y/page） ----------
   用法：容器加 data-reveal="变体"，子项带 .rv；进入视口（下沿上收 14%）触发。
   交错序号 --i 由 common.js 写入直接 .rv 子项；各页既有的 --d 延迟叠加生效。
   无 JS（无 html.js 门类）或 prefers-reduced-motion 时内容直接可见。 */
html{overflow-x:clip}
[data-reveal]{--rv-dur:.9s;--rv-stagger:.07s}
@media (prefers-reduced-motion:no-preference){
  .js [data-reveal] .rv,.js .rv[data-reveal]{translate:0 0}
  /* 翻卡 flip-y：绕竖轴翻面（卡片网格） */
  .js [data-reveal="flip-y"] .rv,.js .rv[data-reveal="flip-y"]{
    opacity:0;will-change:transform,opacity}
  .js [data-reveal="flip-y"].is-in .rv,.js .rv[data-reveal="flip-y"].is-in{
    animation:rvFlipY var(--rv-dur) var(--ease) both;
    animation-delay:calc(var(--i,0)*var(--rv-stagger) + var(--d,0s))}
  /* 翻板 flip-x：绕横轴立起（宽行列表/数字带） */
  .js [data-reveal="flip-x"] .rv,.js .rv[data-reveal="flip-x"]{
    opacity:0;will-change:transform,opacity}
  .js [data-reveal="flip-x"].is-in .rv,.js .rv[data-reveal="flip-x"].is-in{
    animation:rvFlipX 1s cubic-bezier(.5,.05,.3,1) both;
    animation-delay:calc(var(--i,0)*var(--rv-stagger) + var(--d,0s))}
  /* 翻页 page：轴在左边缘，整卡翻过去（头条大卡） */
  .js [data-reveal="page"] .rv,.js .rv[data-reveal="page"]{
    transform-origin:left center;opacity:0;will-change:transform,opacity}
  .js [data-reveal="page"].is-in .rv,.js .rv[data-reveal="page"].is-in{
    animation:rvFlipY var(--rv-dur) var(--ease) both;
    animation-delay:calc(var(--i,0)*var(--rv-stagger) + var(--d,0s))}
  /* 滑入 slide：直接子项从两侧视口外交替滑入（左右分栏） */
  .js [data-reveal="slide"]>.rv-c{opacity:0;will-change:transform,opacity}
  .js [data-reveal="slide"].is-in>.rv-c:nth-child(odd){
    animation:rvSlideL var(--rv-dur) var(--ease) both;
    animation-delay:calc(var(--i,0)*var(--rv-stagger) + var(--d,0s))}
  .js [data-reveal="slide"].is-in>.rv-c:nth-child(even){
    animation:rvSlideR var(--rv-dur) var(--ease) both;
    animation-delay:calc(var(--i,0)*var(--rv-stagger) + var(--d,0s))}
  /* 幕布 curtain：内容不动，遮罩向两侧拉开（照片横幅/全幅 CTA） */
  .js [data-reveal="curtain"]{overflow:hidden}
  .rv-curtain{position:absolute;inset:0;z-index:30;pointer-events:none}
  .rv-curtain i{position:absolute;top:0;bottom:0;width:50.5%;background:var(--teal-dark);
    transition:transform 1s var(--ease);will-change:transform}
  .rv-curtain i::after{content:'';position:absolute;top:0;bottom:0;width:2px;background:rgba(134,222,207,.55)}
  .rv-curtain .c-l{left:0}.rv-curtain .c-l::after{right:0}
  .rv-curtain .c-r{right:0}.rv-curtain .c-r::after{left:0}
  .js [data-reveal="curtain"]>*:not(.rv-curtain){opacity:0;transform:scale(1.045);
    transition:opacity .9s var(--ease) .38s,transform 1.3s var(--ease) .38s}
  .js [data-reveal="curtain"].is-in .rv-curtain .c-l{transform:translateX(-101%)}
  .js [data-reveal="curtain"].is-in .rv-curtain .c-r{transform:translateX(101%)}
  .js [data-reveal="curtain"].is-in>*:not(.rv-curtain){opacity:1;transform:scale(1)}
}
@keyframes rvFlipY{from{transform:perspective(1400px) rotateY(-92deg);opacity:0}
  to{transform:perspective(1400px) rotateY(0deg);opacity:1}}
@keyframes rvFlipX{from{transform:perspective(1200px) rotateX(-92deg);opacity:0}
  to{transform:perspective(1200px) rotateX(0deg);opacity:1}}
@keyframes rvSlideL{from{transform:translateX(calc(-100% - 40px));opacity:0}
  to{transform:translateX(0);opacity:1}}
@keyframes rvSlideR{from{transform:translateX(calc(100% + 40px));opacity:0}
  to{transform:translateX(0);opacity:1}}