/* ============================================================
   万杉 ONESVM — 浅色极简 · 苹果风
   米白底 / 近黑字 / 杉绿强调 · 常规滚动版
   ============================================================ */

:root{
  --bg:        #f7f7f5;
  --bg-soft:   #ffffff;
  --ink:       #1c1c1e;
  --ink-soft:  #6b6b70;
  --ink-faint: #a9a9ae;
  --line:      #e7e7e3;

  /* 杉绿（取自 Logo） */
  --green:      #2fa36b;
  --green-deep: #1e7a4d;
  --green-soft: #9fe3c1;
  --green-glow: rgba(47,163,107,.55);

  --radius: 20px;
  --shadow: 0 20px 60px rgba(28,28,30,.08);
  --ease: cubic-bezier(.22,.61,.36,1);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:84px; }
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }

::selection{ background:var(--green-soft); color:var(--green-deep); }

/* ---------- 光标柔光 ---------- */
.cursor-glow{
  position:fixed; left:0; top:0; z-index:1; pointer-events:none;
  width:520px; height:520px; border-radius:50%;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle, rgba(47,163,107,.10) 0%, rgba(47,163,107,.045) 35%, transparent 65%);
  opacity:0; transition:opacity .6s var(--ease);
  mix-blend-mode:multiply;
}
body.has-cursor .cursor-glow{ opacity:1; }

/* ---------- 顶部导航 ---------- */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:50;
  display:flex; align-items:center; gap:clamp(16px,2.6vw,32px);
  padding:16px clamp(20px,5vw,56px);
  border-bottom:1px solid transparent;
  transition:background .4s, backdrop-filter .4s, border-color .4s;
}
body.scrolled .nav{
  background:rgba(247,247,245,.72);
  backdrop-filter:saturate(180%) blur(16px);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  border-bottom-color:var(--line);
}
.nav-brand{ display:flex; align-items:center; gap:10px; font-size:15px; font-weight:600; letter-spacing:.06em; }
.nav-brand img{ width:28px; height:28px; filter:grayscale(.15); }
.nav-links{ display:flex; gap:clamp(14px,2.2vw,30px); margin-left:auto; }
.nav-links a{
  position:relative; padding:6px 2px;
  font-size:13.5px; letter-spacing:.06em; color:var(--ink-soft);
  transition:color .3s;
}
.nav-links a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:2px;
  background:var(--green); border-radius:2px;
  transition:right .35s var(--ease);
}
.nav-links a:hover, .nav-links a.active{ color:var(--green-deep); }
.nav-links a:hover::after, .nav-links a.active::after{ right:0; }
.nav-cta{
  flex:none;
  font-size:13.5px; font-weight:600; letter-spacing:.05em;
  color:#fff; background:var(--green);
  padding:8px 18px; border-radius:999px;
  transition:background .3s, transform .3s var(--ease);
}
.nav-cta:hover{ background:var(--green-deep); transform:translateY(-1px); }
@media(max-width:900px){ .nav-links{ display:none; } .nav-cta{ margin-left:auto; } }

/* ---------- 主画布 ---------- */
main{ position:relative; z-index:2; }

.stage{
  min-height:100vh;
  display:flex; flex-direction:column; justify-content:center;
  padding:16vh clamp(22px,7vw,96px);
  max-width:1200px; margin:0 auto;
}

/* 着陆页 */
.stage-landing{ position:relative; align-items:center; text-align:center; }
.landing-core{ position:relative; z-index:2; }
.hero-logo{ width:96px; height:96px; margin:0 auto 28px; filter:drop-shadow(0 8px 20px rgba(47,163,107,.25)); }
.brand{
  font-size:clamp(44px,8vw,84px); font-weight:700; letter-spacing:.04em;
  line-height:1.1;
}
.brand-en{
  display:block; margin-top:10px;
  font-size:clamp(16px,2.4vw,24px); font-weight:500; letter-spacing:.55em;
  color:var(--ink-soft); text-indent:.55em;
}
.tagline{
  margin-top:26px; font-size:clamp(15px,1.8vw,19px); color:var(--ink-soft);
  letter-spacing:.06em;
}

/* 着陆页按钮 */
.landing-cta{
  margin-top:42px; display:flex; flex-wrap:wrap; gap:14px; justify-content:center;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:13px 32px; border-radius:999px;
  font-size:15px; font-weight:600; letter-spacing:.06em;
  transition:transform .35s var(--ease), background .3s, color .3s, border-color .3s, box-shadow .35s var(--ease);
}
.btn-primary{
  background:var(--green); color:#fff;
  box-shadow:0 10px 26px rgba(47,163,107,.28);
}
.btn-primary:hover{ background:var(--green-deep); transform:translateY(-2px); }
.btn-ghost{
  background:var(--bg-soft); color:var(--ink);
  border:1px solid var(--line);
}
.btn-ghost:hover{ border-color:rgba(47,163,107,.5); color:var(--green-deep); transform:translateY(-2px); }

/* 向下滚动提示 */
.scroll-cue{
  margin-top:72px;
  display:inline-flex; flex-direction:column; align-items:center; gap:10px;
  font-size:12.5px; letter-spacing:.28em; text-indent:.28em; color:var(--ink-faint);
  transition:color .3s;
}
.scroll-cue:hover{ color:var(--green-deep); }
.scroll-cue svg{ animation:cueBob 2.2s var(--ease) infinite; }
@keyframes cueBob{
  0%,100%{ transform:translateY(0); opacity:.5; }
  50%    { transform:translateY(7px); opacity:1; }
}

/* ---------- 滚动显现（JS 不可用时内容照常可见） ---------- */
.js .reveal{ opacity:0; transform:translateY(48px); }
.js .reveal.in-view{ opacity:1; transform:none; }
.reveal{ transition:opacity .9s var(--ease), transform .9s var(--ease); }

.kicker{
  font-size:13px; letter-spacing:.32em; color:var(--green-deep);
  text-transform:uppercase; margin-bottom:22px; font-weight:600;
}
.headline{
  font-size:clamp(32px,5.4vw,60px); font-weight:700; line-height:1.16;
  letter-spacing:.01em; margin-bottom:26px;
}
.headline b{
  font-weight:700; color:var(--green-deep);
  background:linear-gradient(120deg, var(--green-deep), var(--green));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.lede{
  font-size:clamp(16px,2vw,20px); color:var(--ink-soft);
  max-width:34em; margin-bottom:54px;
}

.cards{
  display:grid; gap:20px;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}
.card{
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:30px 28px;
  box-shadow:0 1px 0 rgba(255,255,255,.6) inset;
  transition:transform .5s var(--ease), box-shadow .5s var(--ease), border-color .5s var(--ease);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow);
  border-color:rgba(47,163,107,.4);
}
.card h3{
  font-size:18px; font-weight:600; letter-spacing:.02em; margin-bottom:12px;
  display:flex; align-items:center; gap:10px;
}
.card h3::before{
  content:""; width:7px; height:7px; border-radius:50%;
  background:var(--green); box-shadow:0 0 10px var(--green-glow);
  flex:none;
}
.card p{ font-size:14.5px; color:var(--ink-soft); }

/* ---------- 核心价值观 ---------- */
.stage-values{ text-align:center; align-items:center; }
.values-hint{ color:var(--ink-soft); font-size:15px; margin-bottom:44px; }

.values-grid{
  display:grid; gap:18px; width:100%;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  max-width:900px;
}
.value{
  position:relative;
  background:var(--bg-soft);
  border:1px solid var(--green); border-radius:var(--radius);
  padding:34px 20px 30px;
  display:flex; flex-direction:column; align-items:center; gap:6px;
  box-shadow:0 0 0 1px var(--green-soft), 0 18px 40px rgba(47,163,107,.16);
  transition:transform .5s var(--ease), box-shadow .5s var(--ease);
}
.value:hover{ transform:translateY(-6px); box-shadow:0 0 0 1px var(--green-soft), 0 24px 50px rgba(47,163,107,.22); }
.value-en{
  font-size:22px; font-weight:700; letter-spacing:.04em;
  background:linear-gradient(120deg,var(--green-deep),var(--green));
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}
.value-zh{ font-size:15px; letter-spacing:.5em; text-indent:.5em; color:var(--green-deep); }
.value-line{ margin-top:12px; font-size:12.5px; color:var(--ink-soft); }

.values-done{
  margin-top:40px; font-size:16px; letter-spacing:.12em; color:var(--green-deep);
}

/* ---------- 页脚 ---------- */
.footer{
  position:relative; z-index:2;
  border-top:1px solid var(--line);
  background:var(--bg-soft);
}
.footer-inner{
  max-width:1200px; margin:0 auto;
  padding:56px clamp(22px,7vw,96px) 40px;
  display:flex; flex-direction:column; gap:26px;
}
.footer-brand{ display:flex; align-items:center; gap:12px; font-weight:600; letter-spacing:.06em; }
.footer-brand img{ width:26px; height:26px; }
.footer-links{ display:flex; flex-wrap:wrap; gap:14px 34px; }
.footer-links a{
  font-size:15px; font-weight:500; color:var(--ink);
  display:flex; align-items:baseline; gap:8px;
  transition:color .3s;
}
.footer-links a em{ font-style:normal; color:var(--ink-faint); font-size:13.5px; transition:color .3s; }
.footer-links a:hover{ color:var(--green-deep); }
.footer-links a:hover em{ color:var(--green); }
.footer-legal{ display:flex; flex-wrap:wrap; gap:8px 24px; font-size:12.5px; color:var(--ink-faint); }
.footer-legal a:hover{ color:var(--green-deep); }
.beian-police{ display:inline-flex; align-items:center; gap:6px; color:var(--ink-faint); }
.beian-police img{ width:14px; height:14px; }
.footer-copy{ font-size:12px; color:var(--ink-faint); letter-spacing:.08em; }

/* ---------- 响应式 ---------- */
@media(max-width:640px){
  .stage{ padding-top:20vh; padding-bottom:20vh; }
  .scroll-cue{ margin-top:52px; }
}

/* ---------- 动效降级 ---------- */
@media(prefers-reduced-motion:reduce){
  *{ animation:none !important; transition-duration:.01ms !important; }
  html{ scroll-behavior:auto; }
  .cursor-glow{ display:none; }
  .js .reveal{ opacity:1; transform:none; }
}