/* ==========================================================================
   微核智能 · Microcore Intelligence
   设计语言：深空蓝 × 量子青 / 大字排版 / 呼吸感流体背景 / 玻璃拟态卡片
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root{
  --bg:        #020b1c;   /* 深空底色 */
  --bg-2:      #04122b;
  --ink:       #eaf4ff;   /* 主文字 */
  --ink-dim:   #9db4d3;   /* 次级文字 */
  --cyan:      #54d8ff;   /* 量子青（品牌强调色） */
  --blue:      #2f7cf6;
  --deep:      #134a9e;
  --line:      rgba(148, 197, 255, .14);
  --glass:     rgba(10, 30, 60, .38);
  --ease-out:  cubic-bezier(.16, 1, .3, 1);
  --font-disp: "Bahnschrift", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ---------- 基础 ---------- */
*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{ background:rgba(84,216,255,.28); color:#fff; }
a{ color:inherit; text-decoration:none; }
em{ font-style:normal; }
img,svg{ display:block; }

/* 滚动条 */
::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-thumb{ background:rgba(84,216,255,.22); border-radius:8px; }
::-webkit-scrollbar-track{ background:#020b1c; }

/* ---------- 背景层：丝绸画布 + 深度罩 + 颗粒 ---------- */
#bg-silk{
  position:fixed; inset:0; width:100%; height:100%;
  z-index:-3; display:block;
  /* WebGL 不可用时的静态兜底渐变 */
  background:
    radial-gradient(130% 100% at 38% 52%, #0a3564 0%, #04122b 52%, #020b1c 100%);
}
.page-scrim{
  position:fixed; inset:0; z-index:-2; pointer-events:none;
  /* 首屏鲜亮，越往下越暗：正文可读性 */
  background:linear-gradient(180deg,
    rgba(2,11,28,.08) 0%,
    rgba(2,11,28,.30) 26%,
    rgba(2,11,28,.66) 55%,
    rgba(2,11,28,.90) 100%);
}
.grain{
  position:fixed; inset:-50%; z-index:60; pointer-events:none; opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grainShift 1.2s steps(3) infinite;
}
@keyframes grainShift{
  0%{ transform:translate(0,0) } 33%{ transform:translate(-4%,3%) } 66%{ transform:translate(3%,-4%) } 100%{ transform:translate(0,0) }
}

/* ---------- 自定义光标（仅精确指针设备） ---------- */
.cursor-dot,.cursor-ring{
  position:fixed; top:0; left:0; z-index:999; pointer-events:none;
  border-radius:50%; transform:translate(-50%,-50%);
  mix-blend-mode:screen; display:none;
}
@media (pointer:fine){ .cursor-dot,.cursor-ring{ display:block } }
.cursor-dot{ width:6px; height:6px; background:var(--cyan); box-shadow:0 0 12px var(--cyan); }
.cursor-ring{
  width:36px; height:36px; border:1px solid rgba(84,216,255,.55);
  transition:width .3s var(--ease-out), height .3s var(--ease-out),
             border-color .3s, background .3s;
}
.cursor-ring.is-active{ width:64px; height:64px; background:rgba(84,216,255,.08); border-color:var(--cyan); }

/* ---------- 滚动进度条 ---------- */
.scroll-progress{ position:fixed; top:0; left:0; right:0; height:2px; z-index:120; }
.scroll-progress i{
  display:block; height:100%; width:100%;
  transform-origin:0 50%; transform:scaleX(0);
  background:linear-gradient(90deg, var(--deep), var(--cyan));
  box-shadow:0 0 12px rgba(84,216,255,.6);
}

/* ---------- 入场：无加载 UI，丝绸聚合态由 js/main.js 驱动自然展开 ---------- */


/* ---------- 导航 ---------- */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:100;
  display:flex; align-items:center; justify-content:space-between;
  padding:16px clamp(20px, 4vw, 56px);
  /* 深蓝色导航底条 */
  background:linear-gradient(180deg, rgba(4,18,43,.96), rgba(3,13,32,.92));
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(84,216,255,.16);
  box-shadow:0 10px 34px rgba(2,10,30,.45);
}
.nav.is-scrolled{
  padding:12px clamp(20px, 4vw, 56px);
  background:linear-gradient(180deg, rgba(3,13,32,.98), rgba(2,11,28,.94));
}
.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{ filter:drop-shadow(0 0 10px rgba(84,216,255,.5)); }
.brand-name{
  font-family:var(--font-disp); font-weight:600; font-size:16px;
  letter-spacing:.34em; text-transform:uppercase;
}
.nav-links{ display:flex; gap:clamp(18px, 3vw, 42px); }

/* ---------- 导航产品胶囊：点击拉长展开 ---------- */
.nav-pill{
  display:flex; align-items:center;
  border:1px solid rgba(84,216,255,.4);
  background:rgba(6,26,56,.72);
  padding:8px;
  transition:border-color .4s, box-shadow .4s;
}
.nav-pill.is-open{
  border-color:rgba(84,216,255,.85);
  box-shadow:0 0 26px rgba(47,124,246,.4);
}
.pill-trigger{
  display:inline-flex; align-items:center; gap:10px;
  background:transparent; border:0; color:var(--ink); cursor:pointer;
  font-family:var(--font-disp); font-size:13px; letter-spacing:.3em; text-indent:.1em;
  padding:6px 14px;
}
.pill-chev{
  width:8px; height:8px;
  border-right:1.5px solid var(--cyan); border-bottom:1.5px solid var(--cyan);
  transform:rotate(45deg); transition:transform .45s var(--ease-out);
}
.nav-pill.is-open .pill-chev{ transform:rotate(225deg); }
.pill-items{
  display:flex; align-items:center; gap:6px;
  max-width:0; opacity:0; overflow:hidden; white-space:nowrap;
  transition:max-width .65s var(--ease-out), opacity .4s;
}
.nav-pill.is-open .pill-items{ max-width:480px; opacity:1; }
.pill-items a{
  padding:6px 16px; font-size:13px; letter-spacing:.16em; color:var(--ink-dim);
  border:1px solid transparent; transition:color .3s, background .3s, border-color .3s;
}
.pill-items a:hover{ color:#03101f; background:var(--cyan); border-color:var(--cyan); }
.nav-links a{
  position:relative; font-size:14px; letter-spacing:.24em; color:var(--ink-dim);
  padding:4px 0; transition:color .35s;
}
.nav-links a::after{
  content:""; position:absolute; left:0; bottom:0; height:1px; width:100%;
  background:var(--cyan); transform:scaleX(0); transform-origin:100% 50%;
  transition:transform .5s var(--ease-out);
}
.nav-links a:hover{ color:var(--ink); }
.nav-links a:hover::after{ transform:scaleX(1); transform-origin:0 50%; }

/* ---------- 按钮 ---------- */
.btn{
  position:relative; display:inline-flex; align-items:center; justify-content:center;
  padding:14px 34px; border-radius:0; overflow:hidden;   /* 方框风格：直角 */
  font-family:var(--font-disp); font-size:14px; letter-spacing:.28em; text-indent:.28em;
  border:1px solid rgba(159,232,255,.5); color:var(--ink);
  transition:color .4s, border-color .4s, transform .2s ease-out;
  will-change:transform;
}
.btn::before{ /* 悬停扫光填充 */
  content:""; position:absolute; inset:0; z-index:-1;
  background:linear-gradient(120deg, var(--deep), var(--cyan));
  transform:translateY(101%); transition:transform .55s var(--ease-out);
}
.btn:hover::before{ transform:translateY(0); }
.btn:hover{ color:#03101f; border-color:var(--cyan); }
.btn-primary{
  border:1px solid rgba(84,216,255,.85); color:#dff6ff;
  box-shadow:0 0 24px rgba(47,124,246,.28), inset 0 0 18px rgba(47,124,246,.12);
}
.btn-ghost{ color:var(--ink-dim); border-color:rgba(159,232,255,.42); }
.btn-ghost:hover{ color:#03101f; border-color:var(--cyan); }
.btn-lg{ padding:18px 52px; font-size:15px; }
.nav-cta{ padding:10px 26px; font-size:12px; }

/* ---------- 通用 section ---------- */
.section{
  position:relative; z-index:1;
  padding:clamp(90px, 14vh, 180px) clamp(20px, 7vw, 120px);
  max-width:1500px; margin:0 auto;
}
.sec-index{
  font-family:var(--font-disp); font-size:12px; letter-spacing:.5em;
  color:rgba(84,216,255,.75); margin-bottom:28px;
}
.sec-title{
  font-family:var(--font-disp); font-weight:600;
  font-size:clamp(30px, 4.6vw, 58px); line-height:1.2; letter-spacing:.04em;
}
.sec-title em{
  background:linear-gradient(120deg, var(--cyan), var(--blue));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.sec-desc{
  max-width:560px; margin-top:30px; color:var(--ink-dim); font-size:16px;
}

/* ---------- HERO：banner 卡面构图 ---------- */
.hero{
  position:relative; min-height:100svh;
  display:flex; align-items:center; justify-content:center;
  padding:110px clamp(20px, 6vw, 100px) 60px;
}
.hero-stage{
  display:flex; align-items:center; gap:clamp(36px, 5.5vw, 96px);
  max-width:1520px; width:100%;
}
/* —— 旋涡 Logo —— */
.hero-logo{
  position:relative; flex:0 0 auto;
  width:clamp(220px, 27vw, 430px);
}
.vortex{
  position:relative; z-index:1; width:100%; height:auto;
  filter:drop-shadow(0 22px 60px rgba(2,10,30,.65)) drop-shadow(0 0 34px rgba(47,124,246,.35));
  animation:vortexSpin 90s linear infinite;
}
@keyframes vortexSpin{ to{ transform:rotate(360deg) } }
.vortex-glow{
  position:absolute; inset:-26%; z-index:0; border-radius:50%;
  background:radial-gradient(circle, rgba(84,216,255,.34) 0%, rgba(47,124,246,.16) 42%, transparent 70%);
  animation:vortexBreath 8s ease-in-out infinite;   /* 呼吸光晕 */
  filter:blur(6px);
}
@keyframes vortexBreath{
  0%,100%{ opacity:.55; transform:scale(.96) }
  50%{ opacity:1; transform:scale(1.06) }
}
/* —— 文案区 —— */
.hero-copy{ flex:1 1 auto; min-width:0; }
.hero-title{
  font-family:var(--font-disp); font-weight:700;
  font-size:clamp(40px, 6vw, 92px);
  line-height:1.16; letter-spacing:.01em; color:#fff;
  text-shadow:0 6px 40px rgba(2,10,30,.6);
  text-wrap:balance;
}
.hero-title em{
  background:linear-gradient(115deg, #f2fdff 0%, #9fe8ff 45%, #3fb6ee 90%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
  filter:drop-shadow(0 0 30px rgba(84,216,255,.35));
}
.hero-rule{
  margin-top:26px; display:flex; align-items:center; gap:18px;
  color:rgba(220,242,255,.85);
}
.hero-rule i{ flex:1; height:1px; background:linear-gradient(90deg, transparent, rgba(159,232,255,.75)); }
.hero-rule i:last-child{ background:linear-gradient(90deg, rgba(159,232,255,.75), transparent); }
.hero-rule span{
  font-family:var(--font-disp); font-size:clamp(11px, 1.25vw, 16px);
  letter-spacing:.55em; text-indent:.55em; white-space:nowrap;
  text-shadow:0 0 18px rgba(84,216,255,.5);
}
.hero-sub{
  margin-top:26px; max-width:560px;
  color:rgba(210,230,248,.88); font-size:clamp(14px, 1.5vw, 17px); letter-spacing:.06em;
}
.hero-actions{ margin-top:44px; display:flex; gap:20px; flex-wrap:wrap; }
/* 供读屏的隐藏标题（如需） */
.sr-only{
  position:absolute; width:1px; height:1px; margin:-1px;
  clip-path:inset(50%); overflow:hidden; white-space:nowrap;
}

.hero-scroll{
  position:absolute; bottom:34px; left:50%; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:10px;
  font-family:var(--font-disp); font-size:10px; letter-spacing:.5em; text-indent:.5em;
  color:var(--ink-dim);
}
.hero-scroll i{
  width:1px; height:52px; overflow:hidden; position:relative;
  background:rgba(148,197,255,.18);
}
.hero-scroll i::after{
  content:""; position:absolute; left:0; top:-40%; width:100%; height:40%;
  background:var(--cyan); animation:drop 1.8s var(--ease-out) infinite;
}
@keyframes drop{ 0%{ top:-40% } 100%{ top:110% } }

/* ---------- 跑马灯 ---------- */
.marquee{
  overflow:hidden; border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  padding:20px 0; -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
          mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee-track{ display:flex; width:max-content; animation:marquee 30s linear infinite; }
.marquee-track span{
  font-family:var(--font-disp); font-size:15px; letter-spacing:.35em;
  color:rgba(157,180,211,.6); white-space:nowrap;
}
@keyframes marquee{ to{ transform:translateX(-50%) } }

/* ---------- 定位宣言 ---------- */
.statement{
  font-family:var(--font-disp); font-weight:600;
  font-size:clamp(30px, 5.4vw, 72px); line-height:1.35; letter-spacing:.03em;
}
.statement span{ display:block; }
.statement em{
  background:linear-gradient(120deg, var(--cyan), var(--blue));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

/* ---------- 架构卡片 ---------- */
.cards{
  margin-top:64px; display:grid; gap:26px;
  grid-template-columns:repeat(auto-fit, minmax(290px, 1fr));
  perspective:1200px;
}
.card{
  position:relative; padding:40px 34px 46px;
  background:var(--glass); border:1px solid var(--line); border-radius:20px;
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  transition:border-color .5s, box-shadow .5s, transform .2s ease-out;
  transform-style:preserve-3d; will-change:transform;
}
.card::before{ /* 跟随鼠标的辉光 */
  content:""; position:absolute; inset:0; border-radius:inherit; opacity:0;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,50%),
             rgba(84,216,255,.16), transparent 45%);
  transition:opacity .5s; pointer-events:none;
}
.card:hover::before{ opacity:1; }
.card:hover{ border-color:rgba(84,216,255,.45); box-shadow:0 30px 70px rgba(3,16,40,.6); }
.card header{ display:flex; align-items:baseline; gap:16px; margin-bottom:20px; }
.card b{
  font-family:var(--font-disp); font-size:15px; color:var(--cyan); letter-spacing:.2em;
}
.card h3{
  font-family:var(--font-disp); font-size:clamp(19px, 1.8vw, 24px);
  font-weight:600; letter-spacing:.06em;
}
.card p{ color:var(--ink-dim); font-size:15px; }
.card p b{ color:var(--ink); font-weight:600; }
.card footer{
  margin-top:30px; font-family:var(--font-disp); font-size:11px;
  letter-spacing:.5em; color:rgba(84,216,255,.5);
}

/* ---------- 理念引言 ---------- */
.philosophy{ text-align:center; }
.philosophy .sec-desc{ margin:34px auto 0; }
.quote{
  font-family:var(--font-disp); font-weight:700;
  font-size:clamp(34px, 6.4vw, 88px); line-height:1.3; letter-spacing:.04em;
}
.quote em{
  background:linear-gradient(120deg, var(--cyan), var(--blue));
  -webkit-background-clip:text; background-clip:text; color:transparent;
  filter:drop-shadow(0 0 30px rgba(47,124,246,.5));
}

/* ---------- 数据 ---------- */
.stat-grid{
  margin-top:56px; display:grid; gap:22px;
  grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
}
.stat{
  padding:38px 30px; border:1px solid var(--line); border-radius:18px;
  background:linear-gradient(180deg, rgba(10,30,60,.32), rgba(10,30,60,.12));
  transition:border-color .4s, transform .4s var(--ease-out);
}
.stat:hover{ border-color:rgba(84,216,255,.4); transform:translateY(-6px); }
.stat-num{
  font-family:var(--font-disp); font-weight:700;
  font-size:clamp(42px, 4.6vw, 64px); line-height:1; color:#fff;
  text-shadow:0 0 30px rgba(47,124,246,.55);
}
.stat-num i{
  font-style:normal; font-size:.42em; margin-left:6px;
  color:var(--cyan); letter-spacing:.1em;
}
.stat p{ margin-top:14px; color:var(--ink-dim); font-size:14px; letter-spacing:.12em; }

/* ---------- 页脚 ---------- */
.footer{
  position:relative; text-align:center;
  padding:clamp(90px, 14vh, 170px) 20px 40px; overflow:hidden;
}
.cta-title{
  font-family:var(--font-disp); font-weight:700;
  font-size:clamp(28px, 4.8vw, 60px); margin-bottom:46px;
}
.cta-title em{
  background:linear-gradient(120deg, var(--cyan), var(--blue));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.footer-word{
  display:block; text-align:center;
  margin-top:70px; margin-right:-.06em;
  font-family:var(--font-disp); font-weight:700;
  font-size:clamp(64px, 16vw, 230px); line-height:1; letter-spacing:.06em;
  color:transparent; -webkit-text-stroke:1px rgba(84,216,255,.16);
  user-select:none;
}
.footer-line{
  margin-top:26px; color:rgba(157,180,211,.55); font-size:12px; letter-spacing:.2em;
}

/* ---------- 滚动浮现动画 ---------- */
[data-reveal]{
  opacity:0; transform:translateY(46px);
  transition:opacity 1s var(--ease-out), transform 1s var(--ease-out);
  transition-delay:calc(var(--i, 0) * 120ms);
}
[data-reveal].is-in{ opacity:1; transform:translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .hero-stage{ flex-direction:column; text-align:center; gap:40px; }
  .hero-sub{ margin-left:auto; margin-right:auto; }
  .hero-actions{ justify-content:center; }
  .hero-rule span{ letter-spacing:.35em; }
}
@media (max-width:760px){
  .nav-links{ display:none; }
  .statement{ font-size:clamp(26px, 7.6vw, 40px); }
  .hero-actions .btn{ padding:13px 26px; }
}

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