/* ==========================================================================
   合乐在线 · 共享样式表  /assets/site.css
   刊头 / 页脚 / 基础版式 / 通用组件
   ========================================================================== */

:root{
  --orange:#FF6B35;
  --orange-deep:#E2541D;
  --teal:#004E64;
  --teal-deep:#00303E;
  --mustard:#F2C14E;
  --slate:#8AA1B1;
  --paper:#FAF6EF;
  --ink:#101418;
  --indigo:#2E2A6B;
  --wine:#7A2136;
  --mist:#D8E6E8;
  --sand:#F0D9B5;

  --font-head:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --line-ink:rgba(16,20,24,.18);
  --line-light:rgba(250,246,239,.2);
}

/* --------------------------------------------------------------- 1. Reset */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:2px}

/* ------------------------------------------------------- 2. 版式基础元素 */
h1,h2,h3,h4{font-family:var(--font-head);font-weight:900;letter-spacing:.01em;line-height:1.25}
strong,b{font-weight:700}
code,kbd,samp,pre{font-family:var(--font-mono)}
::selection{background:var(--orange);color:#fff}

/* --------------------------------------------------------- 3. 布局工具类 */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
@media (max-width:640px){.container{padding:0 18px}}

.grid{display:grid;gap:32px;align-items:start}
.grid--5-7{grid-template-columns:5fr 7fr}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--4-8{grid-template-columns:4fr 8fr}
.grid--3-9{grid-template-columns:3fr 9fr}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:960px){
  .grid--5-7,.grid--7-5,.grid--4-8,.grid--3-9,.grid--3{grid-template-columns:1fr}
}
@media (max-width:700px){
  .grid--2{grid-template-columns:1fr}
}

.section{padding:72px 0}
.section--tight{padding:44px 0}
.section--teal{background:var(--teal);color:var(--paper)}
.section--indigo{background:var(--indigo);color:var(--paper)}
.section--wine{background:var(--wine);color:var(--paper)}
.section--ink{background:var(--ink);color:var(--paper)}
.section--mist{background:var(--mist)}
@media (max-width:640px){.section{padding:52px 0}.section--tight{padding:34px 0}}

.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:16px;margin-bottom:36px;
  border-bottom:1px solid var(--line-ink);
}
.section--teal .section-head,.section--indigo .section-head,
.section--wine .section-head,.section--ink .section-head{border-bottom-color:var(--line-light)}
.section-head__title{font-size:clamp(28px,4vw,40px);line-height:1.2}
.section-head__note{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--slate);white-space:nowrap;
}
@media (max-width:640px){
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .section-head__note{white-space:normal}
}

/* ------------------------------------------------------------- 4. 按钮类 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-head);font-weight:700;font-size:15px;letter-spacing:.04em;
  padding:12px 22px;border:1px solid transparent;border-radius:2px;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn--small{padding:9px 16px;font-size:13px}
.btn--accent{background:var(--orange);border-color:var(--orange);color:#fff}
.btn--accent:hover{background:var(--orange-deep);border-color:var(--orange-deep)}
.btn--ghost{background:transparent;border-color:rgba(250,246,239,.5);color:var(--paper)}
.btn--ghost:hover{border-color:var(--paper);background:rgba(250,246,239,.12)}
.btn--outline{background:transparent;border-color:var(--teal);color:var(--teal)}
.btn--outline:hover{background:var(--teal);color:var(--paper)}
.btn--ink{background:var(--teal);border-color:var(--teal);color:var(--paper)}
.btn--ink:hover{background:var(--teal-deep);border-color:var(--teal-deep)}

/* --------------------------------------------------------------- 5. 刊头 */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--orange);color:#fff;padding:12px 20px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;
}
.skip-link:focus{left:12px;top:12px}

.masthead{
  position:sticky;top:0;z-index:60;
  background:var(--teal);color:var(--paper);
  border-bottom:1px solid rgba(0,0,0,.25);
}
.masthead__bar{position:relative;padding:18px 0 10px}
.masthead__inner{width:100%}
.masthead__grid{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
}

.masthead__meta{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:rgba(216,230,232,.75);justify-self:start;
}
.masthead__meta-mark{
  border:1px solid var(--mustard);color:var(--mustard);
  padding:1px 7px;border-radius:2px;line-height:1.5;
}
.masthead__meta-text{white-space:nowrap}

.masthead__brand{
  display:flex;flex-direction:column;align-items:center;gap:5px;
  justify-self:center;text-align:center;
}
.masthead__brand-mark{
  font-family:var(--font-head);font-weight:900;font-size:34px;line-height:1;
  letter-spacing:.16em;text-indent:.16em;color:var(--paper);
}
.masthead__brand-latin{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;text-indent:.3em;
  color:var(--mustard);
}

.masthead__console{
  display:flex;align-items:center;justify-content:flex-end;gap:16px;
  flex-wrap:wrap;justify-self:end;
}
.console-status{
  display:flex;align-items:center;gap:7px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:rgba(216,230,232,.82);white-space:nowrap;
}
.console-status__dot{
  width:7px;height:7px;border-radius:50%;flex:none;
  background:var(--orange);box-shadow:0 0 0 3px rgba(255,107,53,.22);
}
.console-status__label{color:rgba(216,230,232,.5)}
.console-status__value{color:var(--mustard);font-weight:600}
.console-status__divider{width:1px;height:12px;background:rgba(216,230,232,.3);flex:none}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 13px;border:1px solid rgba(250,246,239,.42);border-radius:2px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--paper);
}
.nav-toggle:hover{border-color:var(--paper);background:rgba(250,246,239,.1)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform .2s ease;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
[data-nav-toggle][aria-expanded="true"] .nav-toggle__bars{background:transparent}
[data-nav-toggle][aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg)}
[data-nav-toggle][aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg)}

.masthead__nav-row{padding:0}
.nav{display:block}
.nav__list{display:flex;justify-content:center;flex-wrap:wrap;gap:2px}
.nav__link{
  display:inline-block;padding:10px 18px;font-size:15px;font-weight:500;
  color:rgba(250,246,239,.84);border-bottom:2px solid transparent;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.nav__link:hover{color:#fff;border-bottom-color:var(--mustard)}
.nav__link[aria-current="page"]{
  color:#fff;font-weight:700;border-bottom-color:var(--orange);
}

.masthead__rule{
  display:flex;align-items:center;gap:8px;
  max-width:1240px;margin:0 auto;padding:0 24px 10px;
}
.rule-dot{width:5px;height:5px;border-radius:50%;background:var(--mustard);flex:none}
.rule-line{flex:1;height:1px;background:rgba(250,246,239,.26)}

@media (max-width:880px){
  .masthead__grid{grid-template-columns:1fr;justify-items:center;gap:12px;padding-top:2px}
  .masthead__meta{display:none}
  .masthead__console{justify-self:center;flex-direction:column;gap:10px}
  .console-status{flex-wrap:wrap;justify-content:center;white-space:normal;text-align:center}
  .nav-toggle{display:inline-flex;position:absolute;top:16px;right:20px;z-index:2}
  .masthead__nav-row{padding-bottom:2px}
  .nav{display:none}
  .nav[data-open="true"]{display:block;padding:6px 0 14px}
  .nav__list{
    flex-direction:column;align-items:stretch;gap:0;
    border-top:1px solid rgba(250,246,239,.18);
  }
  .nav__link{
    display:block;padding:14px 8px;border-bottom:1px solid rgba(250,246,239,.12);
    border-left:2px solid transparent;font-size:16px;
  }
  .nav__link[aria-current="page"]{
    border-left-color:var(--orange);border-bottom-color:rgba(250,246,239,.12);
    background:rgba(255,107,53,.14);
  }
  .masthead__rule{padding-bottom:8px}
}

/* --------------------------------------------------------------- 6. 页脚 */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--teal);color:var(--paper);
  padding:64px 0 30px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--orange);
}
.site-footer::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(250,246,239,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(250,246,239,.05) 1px,transparent 1px);
  background-size:80px 80px;
}
.site-footer > .container{position:relative;z-index:1}

.footer__top{
  display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;
}
.footer__brand-mark{
  font-family:var(--font-head);font-weight:900;font-size:30px;
  letter-spacing:.14em;color:var(--paper);
}
.footer__brand-latin{
  margin-top:6px;font-family:var(--font-mono);font-size:11px;
  letter-spacing:.2em;color:var(--mustard);word-break:break-all;
}
.footer__brand-note{
  margin-top:16px;max-width:26rem;font-size:14px;line-height:1.75;
  color:rgba(216,230,232,.82);
}
.footer__cols{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;
}
.footer__col-title{
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--mustard);padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px solid rgba(250,246,239,.2);
}
.footer__list li + li{margin-top:10px}
.footer__link{
  font-size:15px;color:rgba(250,246,239,.82);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.footer__link:hover{color:var(--orange);border-bottom-color:rgba(255,107,53,.65)}

.footer__contact{
  display:flex;flex-wrap:wrap;gap:14px 44px;
  margin-top:48px;padding:24px 0;
  border-top:1px solid rgba(250,246,239,.18);
  border-bottom:1px solid rgba(250,246,239,.18);
}
.footer__contact-item{display:flex;align-items:baseline;gap:10px;font-size:15px}
.footer__contact-label{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--mustard);white-space:nowrap;
}
.footer__contact-value{color:rgba(250,246,239,.9);word-break:break-word}

.footer__note{
  margin-top:16px;max-width:52rem;
  font-size:13px;line-height:1.7;color:var(--slate);
}
.footer__bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:32px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.06em;color:rgba(216,230,232,.66);
}
.footer__legal{white-space:nowrap}

@media (max-width:900px){
  .footer__top{grid-template-columns:1fr;gap:36px}
}
@media (max-width:760px){
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px}
  .site-footer{padding:52px 0 26px}
  .footer__contact{gap:12px 24px}
}
@media (max-width:420px){
  .footer__cols{grid-template-columns:1fr}
}

/* ----------------------------------------------------- 7. 通用内容组件 */
.prose{max-width:44rem;font-size:17px;line-height:1.85}
.prose>*+*{margin-top:1.05em}
.prose h2{font-size:28px;line-height:1.35;margin-top:1.9em}
.prose h3{font-size:20px;line-height:1.4;margin-top:1.6em}
.prose a{color:var(--teal);border-bottom:1px solid var(--orange)}
.prose ul li{position:relative;padding-left:1.3em}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.78em;width:9px;height:1px;background:var(--orange);
}
.prose blockquote{border-left:3px solid var(--mustard);padding-left:20px;color:var(--slate)}
.prose--narrow{max-width:34rem}
.section--teal .prose,.section--indigo .prose,.section--wine .prose,.section--ink .prose{color:rgba(250,246,239,.9)}

.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--slate);text-transform:uppercase;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--orange);flex:none}

.tag{
  display:inline-block;padding:3px 9px;border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  background:rgba(242,193,78,.22);border:1px solid rgba(242,193,78,.75);color:#6B4E07;
}
.tag--teal{background:rgba(0,78,100,.12);border-color:rgba(0,78,100,.5);color:var(--teal)}
.tag--wine{background:rgba(122,33,54,.12);border-color:rgba(122,33,54,.5);color:var(--wine)}

.stat{display:flex;flex-direction:column;gap:6px}
.stat__num{
  font-family:var(--font-mono);font-weight:700;line-height:1;
  font-size:clamp(40px,6vw,72px);letter-spacing:-.02em;color:var(--orange);
}
.stat__unit{font-size:.36em;letter-spacing:.04em;color:var(--slate);margin-left:4px}
.stat__label{font-size:15px;color:var(--slate)}
.section--teal .stat__label,.section--indigo .stat__label,
.section--wine .stat__label,.section--ink .stat__label{color:rgba(250,246,239,.72)}

.card{
  position:relative;background:var(--paper);color:var(--ink);
  border:1px solid var(--line-ink);padding:28px;
}
.card::before{
  content:"";position:absolute;inset:6px;pointer-events:none;
  background-image:
    radial-gradient(circle,rgba(16,20,24,.5) 0 1.4px,transparent 1.6px),
    radial-gradient(circle,rgba(16,20,24,.5) 0 1.4px,transparent 1.6px),
    radial-gradient(circle,rgba(16,20,24,.5) 0 1.4px,transparent 1.6px),
    radial-gradient(circle,rgba(16,20,24,.5) 0 1.4px,transparent 1.6px);
  background-repeat:no-repeat;
  background-position:left top,right top,left bottom,right bottom;
  background-size:4px 4px;
}
.card--paper{background:var(--paper)}
.card--mist{background:var(--mist)}
.card__title{font-size:20px;font-weight:900;margin-bottom:8px}
.card__text{font-size:15px;line-height:1.8;color:#3B434A}

.annot{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;
  color:var(--slate);
}
.section--teal .annot,.section--indigo .annot,
.section--wine .annot,.section--ink .annot{color:rgba(216,230,232,.7)}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:20px 0;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.06em;color:var(--slate);
}
.breadcrumb a{color:var(--teal);border-bottom:1px solid rgba(0,78,100,.32)}
.breadcrumb a:hover{border-bottom-color:var(--orange)}
.breadcrumb__sep{color:var(--slate)}

/* 图片容器基础规则：页面阶段只需替换 .media__img 内的资源 */
.media{
  position:relative;background:var(--sand);
  padding:14px;border:1px solid rgba(16,20,24,.16);
}
.media__frame{position:relative;overflow:hidden;background:var(--mist)}
.media__img{width:100%;height:100%;object-fit:cover;display:block}
.media--16x9 .media__frame{aspect-ratio:16/9}
.media--4x3 .media__frame{aspect-ratio:4/3}
.media--1x1 .media__frame{aspect-ratio:1/1}
.media--3x4 .media__frame{aspect-ratio:3/4}
.media--tilt{transform:rotate(-.6deg)}
.media--tilt-right{transform:rotate(.7deg)}
.media__caption{
  margin-top:10px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.04em;color:var(--slate);
}

/* ------------------------------------------------- 8. 动效与滚动进度 */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
[data-reveal].is-revealed{opacity:1;transform:none}

.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:80;
  pointer-events:none;background:transparent;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--orange),var(--mustard));
  transition:width .08s linear;
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
  .scroll-progress__bar{transition:none}
  .media--tilt,.media--tilt-right{transform:none}
}