/* ============ 绿茵主场 全站共享样式 ============ */

/* ---------- 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{min-height:100vh;font-family:var(--font-body);font-size:16px;line-height:1.7;color:var(--ink);background:var(--white);-webkit-font-smoothing:antialiased}
img,picture,svg,video{display:block;max-width:100%}
input,button,textarea,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{list-style:none}
a{color:var(--green);text-decoration:none}
::selection{background:var(--green);color:var(--white)}

/* ---------- 变量 ---------- */
:root{
  --green:#0D7A4D;
  --green-dark:#0A5E3B;
  --orange:#FF7A00;
  --orange-dark:#E56A00;
  --teal:#0D3B4F;
  --burgundy:#6B2737;
  --ink:#1F1F1F;
  --gray:#5E6A70;
  --light:#E7ECEF;
  --white:#FFFFFF;
  --sand:#F2E8D5;
  --lime:#B8D45A;
  --font-display:'Montserrat','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --text-xs:.75rem;
  --text-sm:.875rem;
  --text-base:1rem;
  --text-md:1.15rem;
  --text-lg:1.4rem;
  --text-xl:1.8rem;
  --text-2xl:2.4rem;
  --container-w:1180px;
  --shadow-sm:0 2px 8px rgba(31,31,31,.08);
  --shadow-md:0 6px 20px rgba(31,31,31,.12);
  --shadow-lg:0 12px 36px rgba(31,31,31,.16);
  --cut:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,14px 100%,0 calc(100% - 14px));
  --cut-sm:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,8px 100%,0 calc(100% - 8px));
}

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:800;letter-spacing:-.02em;line-height:1.2}
h1{font-size:clamp(2.2rem,4vw,3.4rem)}
h2{font-size:clamp(1.6rem,3vw,2.4rem)}
h3{font-size:var(--text-lg)}
h4{font-size:var(--text-md)}
p{line-height:1.7}
em,strong{font-style:normal;font-weight:700}
a:focus-visible{outline:3px solid var(--orange);outline-offset:2px}

/* ---------- 通用工具 ---------- */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.container{width:min(var(--container-w),calc(100% - 32px));margin-inline:auto}
.skip-link{position:absolute;top:-100%;left:16px;z-index:2000;background:var(--green);color:var(--white);padding:12px 20px;font-family:var(--font-display);font-weight:700;font-size:var(--text-sm)}
.skip-link:focus{top:8px;outline:3px solid var(--orange);outline-offset:2px}
#main-content{scroll-margin-top:64px}
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;font-family:var(--font-display);font-weight:700;font-size:var(--text-sm);line-height:1;letter-spacing:.02em;text-align:center;clip-path:var(--cut-sm);transition:transform .2s ease,background .2s ease,filter .2s ease}
.btn:hover{transform:translateY(-2px);filter:drop-shadow(0 4px 8px rgba(31,31,31,.18))}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--green);color:var(--white)}
.btn--primary:hover{background:var(--green-dark)}
.btn--accent{background:var(--orange);color:var(--ink);font-weight:800}
.btn--accent:hover{background:var(--orange-dark);color:var(--white)}
.btn--ghost{background:transparent;color:var(--green);box-shadow:inset 0 0 0 2px var(--green)}
.btn--ghost:hover{background:var(--green);color:var(--white)}
.btn--teal{background:var(--teal);color:var(--white)}
.btn--teal:hover{background:#123F56}

/* ---------- 品牌 ---------- */
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;line-height:1;color:var(--ink)}
.brand__mark{display:inline-flex;flex:none}
.brand__ball{position:relative;display:block;width:26px;height:26px;border-radius:50%;background:var(--white);border:2px solid var(--ink);transform:rotate(-12deg)}
.brand__ball::before{content:'';position:absolute;left:50%;top:50%;width:11px;height:11px;background:var(--ink);clip-path:polygon(50% 0,100% 38%,82% 100%,18% 100%,0 38%);transform:translate(-50%,-50%)}
.brand__name{font-size:1.35rem;letter-spacing:-.01em}

/* ---------- 头部 ---------- */
.site-header{background:var(--white);border-bottom:4px solid var(--green);position:relative}
.site-header::after{content:'';position:absolute;left:0;bottom:-4px;width:48px;height:4px;background:var(--orange)}
.site-header__top{display:flex;align-items:center;gap:12px;padding:12px 0}
.site-header__slogan{display:none}
.site-header__brand{flex:1;display:flex;justify-content:center}
.site-header__tools{order:-1;display:flex;align-items:center;gap:12px}
.site-header__search{position:relative;display:none}
.site-header__search::before{content:'';position:absolute;left:12px;top:50%;width:12px;height:12px;border:2px solid var(--gray);border-radius:50%;transform:translateY(-62%);pointer-events:none;z-index:1}
.site-header__search::after{content:'';position:absolute;left:22px;top:50%;width:8px;height:2px;background:var(--gray);transform:translateY(2px) rotate(45deg);pointer-events:none;z-index:1}
.search-input{width:220px;padding:10px 16px 10px 38px;border:2px solid var(--light);background:var(--white);font-size:var(--text-sm);color:var(--ink);transition:border-color .2s,box-shadow .2s}
.search-input::placeholder{color:var(--gray)}
.search-input:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(13,122,77,.18)}
.site-header__cta{display:none}
.nav-toggle{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:8px;background:var(--green);clip-path:var(--cut-sm)}
.nav-toggle__bar{display:block;height:3px;width:100%;background:var(--white);transition:transform .3s ease,opacity .3s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
.site-header__navwrap{background:var(--green);min-height:44px;position:sticky;top:0;z-index:800}
.site-header__navinner{padding:0}
.site-nav{max-height:0;overflow:hidden;transition:max-height .35s ease}
.site-nav[data-open]{max-height:480px}
.site-nav__list{display:block}
.site-nav__item{width:100%}
.site-nav__link{display:block;padding:14px 20px;color:var(--white);font-family:var(--font-display);font-weight:700;font-size:var(--text-sm);letter-spacing:.02em;text-align:center;transition:background .2s,color .2s}
.site-nav__link:hover{background:rgba(255,255,255,.14)}
.site-nav__link[aria-current="page"]{background:var(--white);color:var(--green)}

@media (min-width:768px){
  .site-header__top{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:24px 0;gap:0}
  .site-header__slogan{display:block;justify-self:start;position:relative;padding-left:14px;font-size:var(--text-xs);font-weight:700;letter-spacing:.06em;color:var(--gray)}
  .site-header__slogan::before{content:'';position:absolute;left:0;top:3px;bottom:3px;width:4px;background:var(--orange);clip-path:polygon(0 0,100% 0,100% 100%,0 60%)}
  .site-header__brand{flex:none;justify-self:center}
  .site-header__tools{order:0;justify-self:end;display:flex;align-items:center;gap:12px}
  .site-header__search{display:block}
  .site-header__cta{display:inline-flex}
  .nav-toggle{display:none}
  .site-header__navwrap{min-height:0}
  .site-nav{max-height:none;overflow:visible}
  .site-nav__list{display:flex;justify-content:center}
  .site-nav__item{width:auto}
  .site-nav__link{padding:14px 22px}
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--teal);color:rgba(255,255,255,.85)}
.site-footer__inner{display:grid;gap:40px;padding:64px 0 48px}
.site-footer .brand__name{color:var(--white)}
.site-footer .brand__ball{border-color:var(--white)}
.site-footer .brand__ball::before{background:var(--white)}
.site-footer__trust{margin-top:16px;max-width:38ch;font-size:var(--text-sm);color:rgba(255,255,255,.65);line-height:1.8}
.site-footer__heading{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.12em;color:var(--lime);margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid rgba(255,255,255,.15)}
.site-footer__contact{display:grid;gap:6px;font-style:normal;font-size:var(--text-sm);color:rgba(255,255,255,.85)}
.site-footer__note{margin-top:10px;font-size:var(--text-xs);color:rgba(255,255,255,.55);line-height:1.6}
.site-footer__links{display:grid;gap:10px}
.site-footer__links a{color:rgba(255,255,255,.85);font-size:var(--text-sm);transition:color .2s}
.site-footer__links a:hover{color:var(--lime)}
.site-footer__bottom{background:rgba(0,0,0,.24);padding:16px 0}
.site-footer__bottom-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 16px;font-size:var(--text-xs);color:rgba(255,255,255,.6)}
@media (min-width:768px){
  .site-footer__inner{grid-template-columns:1.8fr 1fr 1fr;gap:48px}
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:16px 0;font-size:var(--text-sm)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--gray)}
.breadcrumb__item{display:flex;align-items:center}
.breadcrumb__item + .breadcrumb__item::before{content:'/';color:var(--light);margin-right:8px}
.breadcrumb__item:last-child{font-weight:600;color:var(--ink)}
.breadcrumb a{color:var(--green)}
.breadcrumb a:hover{color:var(--green-dark)}

/* ---------- 卡片 ---------- */
.card{position:relative;background:var(--white);box-shadow:var(--shadow-sm);padding:32px;border-left:4px solid var(--green)}
.card--cut{clip-path:var(--cut);border-left:0;filter:drop-shadow(0 6px 16px rgba(31,31,31,.12))}
.card__title{font-size:var(--text-lg);margin-bottom:8px}
.card__text{color:var(--gray);font-size:var(--text-sm)}
.card__meta{margin-top:12px}

/* ---------- 章节 ---------- */
.chapter{position:relative;padding:clamp(64px,10vw,128px) 0}
.chapter__num{position:absolute;top:40px;left:0;z-index:0;user-select:none;font-family:var(--font-display);font-weight:800;font-size:clamp(4rem,10vw,8rem);line-height:.8;color:var(--green);opacity:.1}
@supports (-webkit-text-stroke:1px black){
  .chapter__num{color:transparent;-webkit-text-stroke:2px var(--green);opacity:1}
}
.chapter__body{position:relative;z-index:1;padding-left:clamp(32px,8vw,140px)}
.chapter__title{margin-bottom:12px}
.chapter__desc{color:var(--gray);max-width:62ch}

/* ---------- 色带 ---------- */
.section-band{height:20px;background:var(--teal);clip-path:polygon(0 0,100% 0,calc(100% - 48px) 100%,0 100%)}
.section-band--burgundy{background:var(--burgundy)}
.section-band--sand{background:var(--sand)}
.section-band--green{background:var(--green)}

/* ---------- 标签与元信息 ---------- */
.tag{display:inline-block;padding:4px 12px;background:var(--sand);color:var(--ink);font-size:var(--text-xs);font-weight:700;letter-spacing:.04em;clip-path:var(--cut-sm)}
.tag--green{background:var(--green);color:var(--white)}
.tag--orange{background:var(--orange);color:var(--ink)}
.meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:var(--text-xs);color:var(--gray);letter-spacing:.02em}

/* ---------- 标签页 ---------- */
.tabs__list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.tabs__btn{display:inline-flex;align-items:center;padding:10px 20px;background:var(--light);color:var(--ink);font-family:var(--font-display);font-weight:700;font-size:var(--text-sm);transition:background .2s,color .2s}
.tabs__btn:hover{background:#dbe2e6}
.tabs__btn.is-active{background:var(--green);color:var(--white)}
.tabs__btn[aria-selected="true"]{background:var(--green);color:var(--white)}
.tabs__panel{display:none}
.tabs__panel.is-active{display:block}
.tabs__panel[hidden]{display:none}

/* ---------- 图片容器 ---------- */
.img-ratio{position:relative;overflow:hidden;background:var(--light)}
.img-ratio::before{content:'';display:block}
.img-ratio--16x9::before{padding-top:56.25%}
.img-ratio--4x3::before{padding-top:75%}
.img-ratio--1x1::before{padding-top:100%}
.img-ratio>*{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}

/* ---------- 装饰 ---------- */
.deco-trajectory{position:absolute;width:260px;height:130px;border:3px dashed var(--lime);border-bottom:none;border-left:none;border-radius:0 100% 0 0;opacity:.5;pointer-events:none}
.deco-line{position:absolute;height:3px;width:100px;background:var(--orange);clip-path:var(--cut-sm);pointer-events:none}

/* ---------- 全局浮层 ---------- */
.progress{position:fixed;top:0;left:0;width:100%;height:3px;z-index:1500;background:linear-gradient(90deg,var(--green),var(--lime));transform:scaleX(0);transform-origin:left center}
.backtop{position:fixed;right:24px;bottom:24px;width:48px;height:48px;z-index:1200;background:var(--teal);color:var(--white);clip-path:var(--cut-sm);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s,background .2s,transform .2s}
.backtop::before{content:'';position:absolute;left:50%;top:50%;width:12px;height:12px;border-left:3px solid currentColor;border-top:3px solid currentColor;transform:translate(-50%,-25%) rotate(45deg)}
.backtop:hover{background:var(--burgundy)}
.backtop.is-visible{opacity:1;visibility:visible}
.backtop:focus-visible{outline:3px solid var(--orange);outline-offset:2px}

/* ---------- 数据组件 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
html.js [data-reveal][data-revealed]{opacity:1;transform:none}
[data-count]{font-family:var(--font-display);font-weight:800;font-variant-numeric:tabular-nums;font-size:clamp(2rem,5vw,3.4rem);line-height:1;color:var(--green)}

/* ---------- 动效适配 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html.js [data-reveal]{opacity:1;transform:none;transition:none}
  .backtop{transition:none}
}