/* ============================================================
   凌悦数字科技 JOYLINK — 星河穿梭 · 3D 未来科技主题
   ============================================================ */
:root {
  --bg: #04050d;
  --panel: rgba(255, 255, 255, 0.045);
  --panel-border: rgba(120, 190, 255, 0.22);
  --text: #eaf0fb;
  --muted: #93a0b8;
  --cyan: #19f0ff;
  --blue: #2d7dff;
  --purple: #a855f7;
  --magenta: #ff3df5;
  --grad: linear-gradient(120deg, var(--cyan), var(--blue) 45%, var(--purple));
  --grad-soft: linear-gradient(120deg, rgba(25, 240, 255, .16), rgba(168, 85, 247, .16));
  --radius: 18px;
  --shadow-glow: 0 0 44px rgba(45, 125, 255, .35);
  --maxw: 1180px;
  --font-head: "Orbitron", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* 3D 穿梭画布 + 叠加层 */
#scene-canvas { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -3; display: block; }
.grid-overlay {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(rgba(120, 190, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 190, 255, .05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at 50% 35%, black, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 35%, black, transparent 78%);
}
.vignette {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(120% 90% at 50% 50%, transparent 55%, rgba(4,5,13,.85) 100%);
}

/* 无 WebGL 时的 CSS 星河降级背景 */
body.no-webgl #scene-canvas {
  background:
    radial-gradient(2px 2px at 20% 30%, rgba(25,240,255,.7), transparent),
    radial-gradient(2px 2px at 70% 60%, rgba(168,85,247,.7), transparent),
    radial-gradient(1.5px 1.5px at 40% 80%, rgba(45,125,255,.6), transparent),
    radial-gradient(1.5px 1.5px at 85% 20%, rgba(255,61,245,.5), transparent),
    radial-gradient(2px 2px at 55% 45%, rgba(25,240,255,.5), transparent),
    radial-gradient(circle at 70% -10%, rgba(45,125,255,.25), transparent 60%),
    radial-gradient(circle at 0% 100%, rgba(168,85,247,.2), transparent 55%),
    var(--bg);
  background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
  animation: driftStars 18s linear infinite alternate;
}
@keyframes driftStars { from { background-position: 0 0,0 0,0 0,0 0,0 0,0 0,0 0,0 0; } to { background-position: 30px 20px,-20px 30px,15px -25px,-25px -15px,10px 20px,0 0,0 0,0 0; } }

a { color: inherit; text-decoration: none; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ===================== 导航 ===================== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s, backdrop-filter .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.navbar.scrolled { background: rgba(4,5,13,.72); backdrop-filter: blur(14px); border-bottom: 1px solid var(--panel-border); }
.nav-inner { max-width: var(--maxw); margin: 0 auto; padding: 16px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; cursor: pointer; }
.brand-mark {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 11px;
  background: var(--grad); color: #04121b; font-family: var(--font-head); font-weight: 900;
  box-shadow: var(--shadow-glow); transition: transform .3s;
}
.brand:hover .brand-mark { transform: rotate(-8deg) scale(1.06); }
.brand-text { font-size: 1.05rem; letter-spacing: .5px; }
.nav-links { display: flex; gap: 26px; }
.nav-links a { font-size: .95rem; color: var(--muted); position: relative; transition: color .25s; cursor: pointer; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px; background: var(--grad); transition: width .25s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: .3s; }

/* 深度 HUD */
.hud { display: flex; align-items: center; gap: 10px; padding: 0 24px 12px; max-width: var(--maxw); margin: 0 auto; }
.hud-label { font-family: var(--font-head); font-size: .6rem; letter-spacing: 2px; color: var(--cyan); }
.hud-bar { flex: 1; height: 3px; border-radius: 999px; background: rgba(255,255,255,.08); overflow: hidden; max-width: 220px; }
.hud-bar i { display: block; height: 100%; width: 0; background: var(--grad); box-shadow: 0 0 12px var(--cyan); }
.hud-val { font-family: var(--font-head); font-size: .7rem; color: var(--muted); }

/* ===================== 面板（3D 透视容器） ===================== */
#scene-root { perspective: 1400px; }
.panel { min-height: 100vh; display: flex; align-items: center; padding: 120px 0 80px; position: relative; transform-style: preserve-3d; }
.panel-inner { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  transform: translateZ(0); transition: transform .3s ease-out; will-change: transform; }

/* Hero */
.hero-content, .panel .panel-inner > * { text-align: center; }
.hero .panel-inner { text-align: center; }
.hero-eyebrow { font-family: var(--font-head); letter-spacing: 4px; font-size: .8rem; color: var(--cyan); margin-bottom: 22px; opacity: .9; }
.hero-title { font-family: var(--font-head); font-weight: 900; font-size: clamp(2.8rem, 8vw, 6rem); line-height: 1.05; letter-spacing: 2px; }
.hero-title .line { display: block; }
.hero-title .glow { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; filter: drop-shadow(0 0 26px rgba(25,240,255,.5)); animation: floatGlow 4s ease-in-out infinite; }
@keyframes floatGlow { 0%,100%{ transform: translateY(0);} 50%{ transform: translateY(-10px);} }
.hero-sub { margin: 28px auto 36px; max-width: 660px; color: var(--muted); font-size: 1.1rem; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 14px 32px; border-radius: 999px; font-weight: 600; font-size: .98rem; cursor: pointer; transition: transform .2s, box-shadow .3s, background .3s, border-color .3s; border: 1px solid transparent; }
.btn-primary { background: var(--grad); color: #04121b; box-shadow: 0 8px 30px rgba(45,125,255,.45); }
.btn-primary:hover { transform: translateY(-3px) scale(1.03); box-shadow: 0 14px 44px rgba(25,240,255,.55); }
.btn-ghost { border-color: var(--panel-border); color: var(--text); background: var(--panel); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-3px); }
.hero-scroll { margin-top: 64px; color: var(--muted); font-size: .75rem; display: flex; flex-direction: column; align-items: center; gap: 10px; letter-spacing: 3px; }
.scroll-line { width: 1px; height: 46px; background: linear-gradient(var(--cyan), transparent); position: relative; overflow: hidden; }
.scroll-line::after { content:""; position:absolute; top:-50%; left:0; width:100%; height:50%; background: var(--cyan); animation: scrollDot 2s infinite; }
@keyframes scrollDot { 0%{ top:-50%;} 100%{ top:100%;} }

/* 区块标题 */
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag { font-family: var(--font-head); letter-spacing: 4px; font-size: .75rem; color: var(--cyan); display: inline-block; margin-bottom: 14px; padding: 4px 14px; border: 1px solid var(--panel-border); border-radius: 999px; }
.section-title { font-family: var(--font-head); font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; }
.section-desc { color: var(--muted); margin-top: 12px; font-size: 1.05rem; }

/* 渐显 */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity .8s ease, transform .8s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===================== 3D 卡片（倾斜跟随鼠标） ===================== */
.card3d {
  background: var(--panel); border: 1px solid var(--panel-border); border-radius: var(--radius);
  padding: 32px 28px; backdrop-filter: blur(10px);
  transition: transform .25s ease, border-color .3s, box-shadow .3s;
  transform-style: preserve-3d; will-change: transform; cursor: pointer;
}
.card3d:hover { border-color: var(--cyan); box-shadow: var(--shadow-glow); }

.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.about-num { font-family: var(--font-head); font-size: 2.4rem; font-weight: 900; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.card3d h3 { font-size: 1.25rem; margin: 14px 0 10px; }
.card3d p { color: var(--muted); }
.card3d p b { color: var(--text); }

/* 业务星站 */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service-card {
  position: relative; overflow: hidden;
  background: var(--panel); border: 1px solid var(--panel-border); border-radius: var(--radius);
  padding: 32px 26px; transform-style: preserve-3d; will-change: transform; cursor: pointer;
  transition: transform .25s ease, border-color .3s, box-shadow .3s;
}
.service-card::before { content: ""; position: absolute; inset: 0; background: var(--grad-soft); opacity: 0; transition: opacity .3s; pointer-events: none; }
.service-card:hover { border-color: var(--cyan); box-shadow: var(--shadow-glow); }
.service-card:hover::before { opacity: 1; }
.service-card > * { position: relative; transform: translateZ(30px); }
.service-icon { font-size: 2rem; width: 58px; height: 58px; display: grid; place-items: center; border-radius: 14px; background: var(--grad-soft); color: var(--cyan); margin-bottom: 18px; border: 1px solid var(--panel-border); }
.service-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.service-card p { color: var(--muted); font-size: .95rem; }
.service-enter { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; color: var(--cyan); font-size: .9rem; font-weight: 600; }
.service-enter .arrow { transition: transform .25s; }
.service-card:hover .service-enter .arrow { transform: translateX(6px); }

/* 合作品牌墙 */
.partner-wall { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; max-width: 980px; margin: 0 auto; }
.partner-tag {
  padding: 10px 20px; border-radius: 999px; background: var(--panel); border: 1px solid var(--panel-border);
  color: var(--muted); font-size: .88rem; font-weight: 500; backdrop-filter: blur(6px); white-space: nowrap;
  transition: transform .25s, border-color .25s, color .25s, box-shadow .25s; cursor: pointer;
}
.partner-tag:hover { transform: translateY(-4px) scale(1.06); border-color: var(--cyan); color: var(--cyan); box-shadow: 0 8px 26px rgba(25,240,255,.18); }
.partner-tag.plus { background: var(--grad-soft); border-color: rgba(168,85,247,.35); color: var(--purple); font-weight: 700; }

/* 技术中枢 */
.tech-wrap { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; }
.tech-list { display: flex; flex-direction: column; gap: 22px; }
.tech-item span { display: block; margin-bottom: 8px; font-weight: 500; }
.bar { height: 9px; border-radius: 999px; background: rgba(255,255,255,.06); overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; border-radius: 999px; background: var(--grad); box-shadow: 0 0 14px rgba(25,240,255,.5); transition: width 1.4s cubic-bezier(.22,1,.36,1); }
.reveal.in .bar i { width: var(--w); }
.tech-note { background: var(--panel); border: 1px solid var(--panel-border); border-radius: var(--radius); padding: 30px; backdrop-filter: blur(10px); }
.tech-note h3 { font-family: var(--font-head); margin-bottom: 12px; color: var(--cyan); }
.tech-note p { color: var(--muted); }

/* 数据 */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat { background: var(--panel); border: 1px solid var(--panel-border); border-radius: var(--radius); padding: 36px 20px; backdrop-filter: blur(10px); }
.stat-num { font-family: var(--font-head); font-size: clamp(2.2rem, 5vw, 3.4rem); font-weight: 900; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { color: var(--muted); margin-top: 8px; font-size: .95rem; }

/* 联系 */
.contact-wrap { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; }
.contact-form { background: var(--panel); border: 1px solid var(--panel-border); border-radius: var(--radius); padding: 34px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; backdrop-filter: blur(10px); }
.field { display: flex; flex-direction: column; gap: 8px; }
.field-full { grid-column: 1 / -1; }
.field label { font-size: .9rem; color: var(--muted); }
.field input, .field textarea { background: rgba(255,255,255,.04); border: 1px solid var(--panel-border); border-radius: 10px; padding: 12px 14px; color: var(--text); font-family: inherit; font-size: .98rem; transition: border-color .25s, box-shadow .25s; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(25,240,255,.12); }
.field textarea { resize: vertical; }
.form-msg { min-height: 20px; font-size: .9rem; }
.form-msg.ok { color: var(--cyan); }
.form-msg.err { color: #ff6b6b; }
.contact-form .btn-primary { grid-column: 1 / -1; justify-self: start; border: 0; }
.contact-info { background: var(--panel); border: 1px solid var(--panel-border); border-radius: var(--radius); padding: 34px; backdrop-filter: blur(10px); }
.contact-info h3 { font-family: var(--font-head); font-size: 1.05rem; color: var(--cyan); margin-bottom: 18px; line-height: 1.5; }
.contact-info ul { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.contact-info li { color: var(--muted); font-size: .95rem; }
.contact-info li span { display: inline-block; width: 48px; color: var(--text); font-weight: 600; }
.contact-qr { margin-top: 22px; height: 120px; border-radius: 12px; border: 1px dashed var(--panel-border); display: grid; place-items: center; color: var(--muted); font-size: .85rem; }
.contact-qr::after { content: attr(data-label); }

/* ===================== 3D 详情场景（点击进入的新页面） ===================== */
.scene-modal { position: fixed; inset: 0; z-index: 200; display: none; perspective: 1200px; }
.scene-modal.open { display: block; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(2,3,10,.78); backdrop-filter: blur(8px); opacity: 0; transition: opacity .4s; }
.scene-modal.open .modal-backdrop { opacity: 1; }
.modal-panel {
  position: absolute; top: 50%; left: 50%; width: min(760px, 92vw); max-height: 86vh; overflow-y: auto;
  transform: translate(-50%, -50%) translateZ(-400px) rotateY(-22deg) scale(.7); opacity: 0;
  background: linear-gradient(160deg, rgba(15,22,42,.96), rgba(8,10,22,.96));
  border: 1px solid var(--panel-border); border-radius: 22px; padding: 38px;
  box-shadow: 0 30px 90px rgba(0,0,0,.6), 0 0 60px rgba(45,125,255,.25);
  transition: transform .55s cubic-bezier(.16,1,.3,1), opacity .45s; transform-style: preserve-3d;
}
.scene-modal.open .modal-panel { transform: translate(-50%, -50%) translateZ(0) rotateY(0) scale(1); opacity: 1; }
.modal-close { position: sticky; top: 0; float: right; background: var(--panel); border: 1px solid var(--panel-border); color: var(--cyan); padding: 8px 16px; border-radius: 999px; cursor: pointer; font-size: .85rem; font-weight: 600; transition: .25s; }
.modal-close:hover { background: var(--grad-soft); border-color: var(--cyan); transform: translateY(-2px); }
.modal-body .m-tag { font-family: var(--font-head); letter-spacing: 3px; font-size: .75rem; color: var(--cyan); }
.modal-body .m-title { font-family: var(--font-head); font-size: clamp(1.6rem, 4vw, 2.4rem); margin: 10px 0 18px; }
.modal-body .m-icon { font-size: 3rem; margin-bottom: 14px; filter: drop-shadow(0 0 18px rgba(25,240,255,.5)); }
.modal-body .m-desc { color: var(--muted); font-size: 1.02rem; margin-bottom: 18px; }
.modal-body .m-list { list-style: none; display: flex; flex-direction: column; gap: 12px; margin: 8px 0 20px; }
.modal-body .m-list li { padding-left: 26px; position: relative; color: var(--text); }
.modal-body .m-list li::before { content: "▹"; position: absolute; left: 0; color: var(--cyan); }
.modal-body .m-meta { display: flex; flex-wrap: wrap; gap: 10px; }
.modal-body .m-chip { font-size: .82rem; padding: 6px 14px; border-radius: 999px; background: var(--grad-soft); border: 1px solid var(--panel-border); color: var(--cyan); }
.modal-body .m-stats { display: flex; gap: 24px; flex-wrap: wrap; margin-top: 14px; }
.modal-body .m-stats div { }
.modal-body .m-stats b { font-family: var(--font-head); font-size: 1.8rem; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; display: block; }
.modal-body .m-stats span { color: var(--muted); font-size: .85rem; }

/* ===================== 页脚 ===================== */
.footer { border-top: 1px solid var(--panel-border); padding: 40px 0; background: rgba(4,5,13,.7); position: relative; z-index: 2; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.footer-copy { color: var(--muted); font-size: .86rem; }
.footer-links { display: flex; gap: 18px; }
.footer-links a { color: var(--muted); font-size: .9rem; cursor: pointer; }
.footer-links a:hover { color: var(--cyan); }

/* 光标跟随光晕 */
.cursor-glow { position: fixed; width: 26px; height: 26px; border-radius: 50%; pointer-events: none; z-index: 150;
  background: radial-gradient(circle, rgba(25,240,255,.55), transparent 70%); transform: translate(-50%, -50%);
  mix-blend-mode: screen; transition: opacity .3s; opacity: 0; }

/* ===================== 响应式 ===================== */
@media (max-width: 900px) {
  .about-grid, .services-grid, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-wrap, .contact-wrap { grid-template-columns: 1fr; }
  .nav-links { position: fixed; inset: 64px 0 auto 0; flex-direction: column; gap: 0; padding: 16px 24px; background: rgba(4,5,13,.97); backdrop-filter: blur(14px); border-bottom: 1px solid var(--panel-border); transform: translateY(-120%); transition: transform .35s ease; }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
  .nav-toggle { display: flex; }
  .contact-form { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .about-grid, .services-grid, .stats-grid { grid-template-columns: 1fr; }
  .panel { padding: 100px 0 60px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .card3d, .service-card { transform: none !important; }
}