/* =========================================================
   大湾沃土 e 守护 · 作品展示网站
   Design tokens
   ========================================================= */
:root{
  --ink:#0A0A0B;
  --ink-2:#52525B;
  --ink-3:#71717A;
  --ink-4:#A1A1AA;
  --line:#E4E4E7;

  --green-900:#0A3327;
  --green-800:#0F4C36;
  --green-700:#155940;
  --green-500:#10B981;
  --green-400:#4ADE80;
  --green-100:#E3F3EA;
  --green-50:#F4F7F5;

  --bg:#FFFFFF;
  --bg-tint:#F4F7F5;
  --bg-flat:#F9F9FB;

  --r-card:12px;
  --r-lg:16px;
  --r-pill:100px;

  --sh-1:0 1px 2px rgba(15,20,25,.04);
  --sh-2:0 4px 12px rgba(15,20,25,.06);
  --sh-3:0 30px 60px -20px rgba(15,20,25,.18);

  --wrap:1280px;
  --gutter:80px;

  --ff:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16px;
  line-height:1.65;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ol,ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:calc(var(--wrap) + var(--gutter)*2);margin:0 auto;padding-inline:var(--gutter);}
.wrap--narrow{max-width:calc(1120px + var(--gutter)*2);}

.section{padding-block:96px;}
.section--tight{padding-block:0 96px;}
.section--white{background:var(--bg);}
.section--tint{background:var(--bg-tint);}
.section--dark{background:var(--green-800);color:#fff;}

/* ---------- typography ---------- */
.h2{font-size:clamp(28px,3.4vw,38px);line-height:1.32;}
.h2--sm{font-size:clamp(26px,2.9vw,34px);}
.eyebrow{font-size:13px;font-weight:700;color:var(--green-500);letter-spacing:.02em;margin-bottom:14px;}
.eyebrow--green{color:var(--green-400);}
.lead{font-size:15px;line-height:1.82;color:var(--ink-2);margin-top:16px;}
.lead--center{margin-inline:auto;max-width:640px;}
.head{max-width:760px;}
.head--center{margin-inline:auto;text-align:center;}
.head--dark .lead{color:#A7D9C2;}
.head--dark .h2{color:#fff;}

/* ---------- chip ---------- */
.chip{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:var(--r-pill);
  background:var(--green-100);color:var(--green-800);font-size:13px;font-weight:600;line-height:1;}
.chip__dot{width:7px;height:7px;border-radius:50%;background:var(--green-500);flex:none;}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;border:1px solid transparent;
  transition:transform .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease),color .25s var(--ease);
  will-change:transform;}
.btn--pill{padding:15px 30px;border-radius:var(--r-pill);}
.btn--dark{background:var(--green-800);color:#fff;box-shadow:0 6px 18px -8px rgba(15,76,54,.6);}
.btn--dark:hover{background:var(--green-900);transform:translateY(-2px);box-shadow:0 12px 26px -10px rgba(15,76,54,.7);}
.btn--ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--ink);transform:translateY(-2px);}

/* =========================================================
   NAV
   ========================================================= */
.nav{position:fixed;inset:0 0 auto;z-index:60;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .3s var(--ease),box-shadow .3s var(--ease);}
.nav.is-stuck{border-bottom-color:var(--line);box-shadow:var(--sh-1);}
.nav__inner{max-width:calc(var(--wrap) + var(--gutter)*2);margin:0 auto;padding-inline:var(--gutter);
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;}
.nav__brand{display:flex;align-items:center;gap:12px;flex:none;}
.nav__mark{position:relative;width:34px;height:34px;border-radius:10px;background:var(--green-800);display:grid;place-items:center;}
.nav__mark-dot{width:12px;height:12px;border-radius:50%;background:var(--green-400);}
.nav__name{font-size:17px;font-weight:700;letter-spacing:-.01em;}
.nav__links{display:flex;align-items:center;gap:30px;}
.nav__links a{font-size:14px;font-weight:500;color:var(--ink-2);position:relative;transition:color .2s;}
.nav__links a::after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:2px;background:var(--green-800);transition:right .3s var(--ease);}
.nav__links a:hover{color:var(--ink);}
.nav__links a:hover::after{right:0;}
.nav__cta{padding:10px 20px;font-size:14px;}
.nav__toggle{display:none;width:40px;height:40px;border:0;background:none;cursor:pointer;padding:8px;flex-direction:column;justify-content:center;gap:5px;}
.nav__toggle span{display:block;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease),opacity .3s;}
.nav__toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav__toggle.is-open span:nth-child(2){opacity:0;}
.nav__toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* =========================================================
   HERO
   ========================================================= */
.hero{position:relative;background:var(--green-50);padding-block:calc(72px + 68px) 68px;overflow:hidden;}
.hero__glow{position:absolute;top:115px;right:-60px;width:560px;height:560px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,#C7E9D6 0%,rgba(199,233,214,0) 68%);opacity:.75;pointer-events:none;}
.hero__grid{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:60px;align-items:center;}
.hero__text{display:flex;flex-direction:column;gap:26px;align-items:flex-start;}
.hero__title{font-size:clamp(38px,5.2vw,62px);line-height:1.14;letter-spacing:-.025em;}
.hero__sub{font-size:16px;line-height:1.78;color:var(--ink-2);max-width:620px;}
.hero__btns{display:flex;flex-wrap:wrap;gap:14px;}
.hero__stats{display:flex;flex-wrap:wrap;gap:44px;margin:6px 0 0;}
.hero__stats dt{font-size:26px;font-weight:700;color:var(--green-800);line-height:1.2;}
.hero__stats dd{margin:3px 0 0;font-size:12px;color:var(--ink-3);}
.hero__visual{margin:0;display:grid;place-items:center;
  animation:float 7s ease-in-out infinite;}
.hero__visual img{width:100%;max-width:400px;filter:drop-shadow(0 30px 50px rgba(10,51,39,.18));}
@keyframes float{0%,100%{transform:translateY(0);}50%{transform:translateY(-14px);}}

/* =========================================================
   CARDS / GRID
   ========================================================= */
.grid{display:grid;gap:20px;}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr));}
.grid--5{grid-template-columns:repeat(5,minmax(0,1fr));}
.grid--6{grid-template-columns:repeat(6,minmax(0,1fr));}

.card{display:flex;flex-direction:column;gap:12px;padding:26px;border-radius:var(--r-card);height:100%;}
.card--flat{background:var(--bg-flat);}
.card--tint{background:var(--bg-tint);}
.card--dark{background:var(--green-700);}
.card__num{font-size:13px;font-weight:700;color:var(--ink-4);}
.card--dark .card__num{color:var(--green-400);}
.card__icon{width:44px;height:44px;border-radius:12px;background:var(--green-800);position:relative;flex:none;}
.card__icon::after{content:"";position:absolute;inset:13px;border-radius:4px;background:var(--green-400);opacity:.9;}
.card__title{font-size:18px;font-weight:700;}
.card--dark .card__title{color:#fff;}
.card__desc{font-size:14px;line-height:1.72;color:var(--ink-2);}
.card--dark .card__desc{color:#A7D9C2;}

/* =========================================================
   FLOW
   ========================================================= */
.flow{display:flex;align-items:stretch;gap:8px;margin-top:44px;}
.flow__item{flex:1 1 0;display:flex;flex-direction:column;gap:10px;padding:22px;border-radius:var(--r-card);
  background:var(--green-700);min-width:0;}
.flow__step{font-size:12px;font-weight:700;color:var(--green-400);}
.flow__title{font-size:16px;font-weight:700;color:#fff;}
.flow__desc{font-size:13px;line-height:1.65;color:#A7D9C2;}
.flow__arrow{display:grid;place-items:center;font-size:20px;font-weight:700;color:var(--green-400);flex:none;}

/* =========================================================
   SHOT / SHOWCASE
   ========================================================= */
.shot{margin:0;border-radius:var(--r-lg);overflow:hidden;background:var(--bg-flat);box-shadow:var(--sh-2);}
.shot img{width:100%;}
/* 数据表卡片：横向宽图，限制最大宽度居中 */
.shot--db{margin:40px auto 0;max-width:940px;background:transparent;box-shadow:none;}
.shot--db img{border-radius:var(--r-lg);box-shadow:var(--sh-3);}

.showcase{margin:0;border-radius:var(--r-lg);overflow:hidden;background:#fff;box-shadow:var(--sh-2);}
.showcase img{width:100%;}
.showcase--sm img{border-bottom:1px solid var(--line);}
.showcase--sm figcaption{padding:18px 22px;font-size:14px;font-weight:600;color:var(--ink-2);}
.showcase__cap{margin-top:14px;}
.showcase__cap h3{font-size:16px;font-weight:700;}
.showcase__cap p{font-size:14px;line-height:1.7;color:var(--ink-2);margin-top:4px;}
.showcase__row{margin-top:36px;}

/* =========================================================
   CHART
   ========================================================= */
.chartwrap{margin-top:36px;background:#fff;border-radius:var(--r-lg);box-shadow:var(--sh-2);overflow:hidden;}
.chartwrap__bar{display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 24px;border-bottom:1px solid var(--line);}
.chartwrap__live{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--green-800);}
.chartwrap__meta{font-size:13px;color:var(--ink-3);}
.chartwrap__meta b{color:var(--green-800);font-variant-numeric:tabular-nums;}
.pulse{width:8px;height:8px;border-radius:50%;background:var(--green-500);position:relative;flex:none;}
.pulse::after{content:"";position:absolute;inset:0;border-radius:50%;background:var(--green-500);
  animation:ping 1.8s cubic-bezier(0,0,.2,1) infinite;}
@keyframes ping{0%{transform:scale(1);opacity:.7;}80%,100%{transform:scale(2.6);opacity:0;}}
.chart{width:100%;height:420px;}

/* =========================================================
   HARDWARE
   ========================================================= */
.hw{border-radius:var(--r-lg);overflow:hidden;background:var(--bg-flat);display:flex;flex-direction:column;}
.hw__media{height:320px;background:#fff;display:grid;place-items:center;overflow:hidden;}
.hw__media img{width:100%;height:100%;object-fit:cover;}
.hw__body{padding:28px;display:flex;flex-direction:column;gap:10px;}
.hw__title{font-size:20px;font-weight:700;}
.hw__desc{font-size:14px;line-height:1.78;color:var(--ink-2);}

/* =========================================================
   SPLIT / QUOTE
   ========================================================= */
.split{display:grid;grid-template-columns:minmax(0,1fr) 460px;gap:56px;align-items:center;}
.split__text{display:flex;flex-direction:column;}
.split__media{margin:0;border-radius:var(--r-lg);overflow:hidden;background:var(--bg-tint);box-shadow:var(--sh-2);}
.split__media img{width:100%;height:380px;object-fit:cover;}
/* 截图类：完整显示，避免裁掉字段/标注 */
.split__media--shot img{height:auto;object-fit:contain;}
.quote{margin:28px 0 0;padding:24px;border-radius:var(--r-card);background:var(--bg-tint);}
.quote strong{display:block;font-size:15px;color:var(--green-800);margin-bottom:8px;}
.quote p{font-size:14px;line-height:1.78;color:var(--ink-2);}

/* 要点清单（带勾选标记） */
.ticks{list-style:none;margin:22px 0 0;display:flex;flex-direction:column;gap:12px;}
.ticks li{position:relative;padding-left:26px;font-size:14px;line-height:1.7;color:var(--ink-2);}
.ticks li::before{content:"";position:absolute;left:0;top:7px;width:14px;height:8px;
  border-left:2px solid var(--green-500);border-bottom:2px solid var(--green-500);
  transform:rotate(-45deg);border-radius:1px;}
/* 横向三列要点 */
.ticks--row{margin-top:28px;flex-direction:row;gap:0;justify-content:center;flex-wrap:wrap;}
.ticks--row li{font-size:13.5px;padding-left:0;}
.ticks--row li::before{display:none;}
.ticks--row li + li::after{content:"";position:absolute;left:0;top:50%;width:4px;height:4px;
  border-radius:50%;background:var(--green-400, #4ADE80);transform:translateY(-50%);}
.ticks--row li + li{padding-left:20px;}
/* 行内代码 */
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em;
  padding:2px 6px;border-radius:5px;background:rgba(15,76,54,.07);color:var(--green-800);}

/* =========================================================
   META LINE
   ========================================================= */
.team__meta{margin-top:32px;text-align:center;font-size:13px;color:var(--ink-3);}

/* =========================================================
   FOOTER
   ========================================================= */
.footer{position:relative;background:#0A0A0B;color:#fff;padding-block:80px 36px;overflow:hidden;}
.footer__glow{position:absolute;top:-120px;right:-80px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(15,76,54,.95) 0%,rgba(15,76,54,0) 70%);pointer-events:none;}
.footer .wrap{position:relative;}
.footer__main{display:flex;justify-content:space-between;gap:60px;flex-wrap:wrap;}
.footer__brand h3{font-size:26px;font-weight:700;letter-spacing:-.02em;}
.footer__brand p{margin-top:14px;font-size:14px;line-height:1.7;color:var(--ink-4);max-width:360px;}
.footer__cols{display:flex;gap:64px;flex-wrap:wrap;}
.footer__cols>div{display:flex;flex-direction:column;gap:12px;}
.footer__cols h4{font-size:13px;font-weight:700;color:#fff;}
.footer__cols a,.footer__cols span{font-size:13px;color:var(--ink-4);transition:color .2s;}
.footer__cols a:hover{color:var(--green-400);}
.footer__bar{margin-top:56px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:12px;color:var(--ink-3);}

/* =========================================================
   TO TOP
   ========================================================= */
.totop{position:fixed;right:28px;bottom:28px;z-index:50;width:46px;height:46px;border:0;cursor:pointer;
  border-radius:50%;background:var(--green-800);color:#fff;font-size:18px;line-height:1;
  box-shadow:var(--sh-3);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;}
.totop.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.totop:hover{background:var(--green-900);}

/* =========================================================
   REVEAL
   ========================================================= */
.reveal{opacity:0;transform:translateY(22px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
.reveal[data-delay="1"]{transition-delay:.08s;}
.reveal[data-delay="2"]{transition-delay:.16s;}
.reveal[data-delay="3"]{transition-delay:.24s;}
.reveal[data-delay="4"]{transition-delay:.32s;}
.reveal[data-delay="5"]{transition-delay:.4s;}

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

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1180px){
  :root{--gutter:48px;}
  .hero__grid{grid-template-columns:minmax(0,1fr) 320px;gap:40px;}
  .hero__glow{right:-180px;}
  .grid--5{grid-template-columns:repeat(3,minmax(0,1fr));}
  .grid--6{grid-template-columns:repeat(3,minmax(0,1fr));}
  .flow{flex-wrap:wrap;}
  .flow__item{flex:1 1 190px;}
  .flow__arrow{display:none;}
  .split{grid-template-columns:minmax(0,1fr) 380px;gap:40px;}
}

@media (max-width:900px){
  :root{--gutter:32px;}
  .section{padding-block:72px;}
  .section--tight{padding-block:0 72px;}
  .nav__links{display:none;}
  .nav__cta{display:none;}
  .nav__toggle{display:flex;}
  .nav.is-open .nav__links{display:flex;position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;background:#fff;
    border-top:1px solid var(--line);box-shadow:var(--sh-2);padding:8px var(--gutter) 20px;}
  .nav.is-open .nav__links a{padding:14px 0;width:100%;font-size:15px;}
  .nav.is-open .nav__links a::after{display:none;}

  .hero{padding-block:calc(72px + 48px) 56px;}
  .hero__grid{grid-template-columns:1fr;gap:36px;}
  .hero__visual{order:-1;}
  .hero__visual img{max-width:260px;}
  .hero__glow{top:auto;bottom:-120px;left:-120px;right:auto;width:420px;height:420px;}
  .hero__stats{gap:28px;}

  .grid--2,.grid--4,.grid--5{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:28px;}
  .split__media img{height:260px;}
  .flow__item{flex:1 1 100%;}
  .chart{height:340px;}
  .footer__main{flex-direction:column;gap:40px;}
  .footer__cols{gap:40px;}
}

@media (max-width:600px){
  :root{--gutter:20px;}
  body{font-size:15px;}
  .section{padding-block:56px;}
  .section--tight{padding-block:0 56px;}
  .hero__title{font-size:clamp(30px,8.6vw,38px);}
  .hero__stats{gap:20px 28px;}
  .hero__stats dt{font-size:22px;}
  .grid--2,.grid--4,.grid--5,.grid--6{grid-template-columns:1fr;}
  .flow__item{padding:20px;}
  .chartwrap__bar{flex-direction:column;align-items:flex-start;gap:8px;}
  .chart{height:300px;}
  .hw__media{height:220px;}
  .totop{right:16px;bottom:16px;}
  .footer__bar{flex-direction:column;gap:8px;}
}