/* ===============================
   NeoBright - Orange / White / Navy
   =============================== */

:root{
  /* Surfaces */
  --bg: #ffffff;
  --bg-soft: #f6f7fb;
  --card: rgba(255,255,255,.92);

  /* Text */
  --text: #0f172a;      /* deep navy */
  --muted: #64748b;     /* slate */
  --line: rgba(15,23,42,.10);

  /* Brand (Orange) - use sparingly */
  --accent: #f97316;    /* brand orange */
  --accent-2: #fb923c;  /* lighter orange */
  --accent-soft: #fff7ed; /* very light orange background */

  /* Shadows & radius */
  --shadow: 0 18px 44px rgba(15,23,42,.10);
  --shadow-2: 0 10px 24px rgba(15,23,42,.08);
  --radius: 18px;

  --max: 1180px;
}

/* Typography: less tech, more education/business */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  color:var(--text);
  background:
    radial-gradient(900px 600px at 15% 0%, rgba(249,115,22,.10), transparent 55%),
    radial-gradient(900px 600px at 90% 10%, rgba(15,23,42,.08), transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  font-family:
    "Noto Serif SC", "Source Han Serif SC", "STSong",
    "Noto Sans SC", "PingFang SC", "Microsoft YaHei",
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  overflow-x:hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a{color:inherit; text-decoration:none}
img{max-width:100%; display:block}
.container{
  width:min(var(--max), calc(100% - 36px));
  margin:0 auto;
}

/* ---------------- Topbar ---------------- */
.topbar{
  position: sticky;
  top:0;
  z-index:50;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,.78);
  border-bottom: 1px solid var(--line);
}

.topbar-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width: 220px;
}
.brand-logo{
  width:44px; height:44px;
  display:grid; place-items:center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 12px 26px rgba(249,115,22,.22);
  font-weight: 800;
  letter-spacing: .5px;
  color: #fff;
}
.brand-name{
  font-weight:900;
  font-size:14px;
  line-height:1.1;
}
.brand-sub{
  font-size:12px;
  color:var(--muted);
  opacity:.95;
}

.nav{
  display:flex;
  gap:10px;
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.72);
}
.nav a{
  font-size:14px;
  color: rgba(15,23,42,.92);
  padding:8px 12px;
  border-radius: 999px;
  transition: all .2s ease;
}
.nav a:hover{
  background: rgba(249,115,22,.10);
  color: rgba(15,23,42,.95);
}

.topbar-actions{
  display:flex;
  align-items:center;
  gap:10px;
}

.topbar-contact{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--muted);
  font-size:13px;
  padding:8px 12px;
  border:1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,.72);
}

.dot{
  width:8px;height:8px;border-radius:999px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(249,115,22,.12);
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius: 999px;
  border:1px solid var(--line);
  padding: 12px 16px;
  font-weight:800;
  transition: all .2s ease;
  cursor:pointer;
  background: rgba(255,255,255,.8);
  color: rgba(15,23,42,.95);
}
.btn.primary{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  box-shadow: 0 16px 34px rgba(249,115,22,.18);
  color: #fff;
}
.btn.primary:hover{transform: translateY(-1px); filter:saturate(1.05)}
.btn.ghost{
  background: rgba(255,255,255,.84);
}
.btn.ghost:hover{
  background: rgba(249,115,22,.10);
  border-color: rgba(249,115,22,.18);
}
.btn.tiny{padding:10px 12px; font-size:13px}

.hamburger{
  display:none;
  width:42px;height:42px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.82);
  cursor:pointer;
}
.hamburger span{
  display:block;
  width:18px;height:2px;
  background: rgba(15,23,42,.92);
  margin:4px auto;
  border-radius: 99px;
}

/* Mobile menu */
.mobile-menu{
  display:none;
  border-top: 1px solid var(--line);
  padding:10px 18px 16px;
  background: rgba(255,255,255,.92);
}
.mobile-menu a{
  display:block;
  padding:12px 8px;
  color: rgba(15,23,42,.92);
  border-radius: 12px;
}
.mobile-menu a:hover{
  background: rgba(249,115,22,.10);
}
.mobile-divider{height:1px;background: var(--line); margin:10px 0}
.mobile-muted{color: var(--muted)}

/* ---------------- Hero ---------------- */
.hero{
  position:relative;
  padding: 44px 0 22px;
  min-height: 760px;
  overflow:hidden;
  background: transparent;
}

/* Three.js canvas: lighter overlay on white */
#threeHero{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
  opacity:.55;
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:
    radial-gradient(900px 520px at 15% 15%, rgba(249,115,22,.12), transparent 62%),
    radial-gradient(1000px 640px at 85% 20%, rgba(15,23,42,.10), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(246,247,251,.95));
  pointer-events:none;
}

.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 26px;
  align-items:center;
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.86);
  border:1px solid var(--line);
  color: rgba(15,23,42,.88);
  font-weight: 800;
  font-size: 13px;
  margin-bottom: 14px;
}

.hero-title{
  margin:0;
  font-size: 44px;
  letter-spacing: -0.6px;
  line-height: 1.12;
  color: rgba(15,23,42,.98);
}

/* Title accent: orange only, no neon */
.gradient-text{
  background: linear-gradient(135deg, var(--accent), #ea580c);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.hero-subtitle{
  margin: 14px 0 20px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 15px;
  max-width: 560px;
}

.hero-actions{display:flex; gap:12px; margin-bottom: 18px}

.hero-stats{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
.stat{
  flex: 1;
  min-width: 150px;
  padding: 14px 14px;
  border-radius: 16px;
  background: rgba(255,255,255,.86);
  border:1px solid var(--line);
  box-shadow: var(--shadow-2);
}
.stat-num{
  font-size: 26px;
  font-weight: 950;
  letter-spacing: .2px;
}
.stat-label{
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

/* Carousel */
.carousel{
  position:relative;
  border-radius: var(--radius);
  overflow:hidden;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.90);
  box-shadow: var(--shadow);
  min-height: 420px;
}
.carousel-stage{
  position:relative;
  height: 520px;
}
.carousel-slide{
  position:absolute;
  inset:0;
  background-size: cover;
  background-position: center;
  opacity:0;
  transform: scale(1.02);
  transition: opacity .8s ease, transform 1.2s ease;
}
.carousel-slide.is-active{
  opacity:1;
  transform: scale(1);
}
.carousel::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(15,23,42,.28));
  pointer-events:none;
}

.carousel-btn{
  position:absolute;
  top:50%;
  transform: translateY(-50%);
  width:44px; height:44px;
  border-radius: 999px;
  border:1px solid rgba(255,255,255,.65);
  background: rgba(255,255,255,.78);
  color: rgba(15,23,42,.90);
  font-size: 26px;
  display:grid;
  place-items:center;
  cursor:pointer;
  z-index:3;
  transition: all .2s ease;
}
.carousel-btn:hover{
  background: rgba(249,115,22,.12);
  border-color: rgba(249,115,22,.22);
}
.carousel-btn.prev{left:14px}
.carousel-btn.next{right:14px}

.carousel-dots{
  position:absolute;
  left: 0;
  right: 0;
  bottom: 14px;
  display:flex;
  gap:8px;
  justify-content:center;
  z-index:3;
}
.dot-btn{
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border:1px solid rgba(15,23,42,.30);
  background: rgba(255,255,255,.75);
  cursor:pointer;
  transition: all .2s ease;
}
.dot-btn.is-active{
  width: 24px;
  background: var(--accent);
  border-color: transparent;
}

.hero-card{
  position:absolute;
  right: 14px;
  top: 14px;
  width: 240px;
  border-radius: 16px;
  padding: 14px 14px;
  background: rgba(255,255,255,.86);
  border:1px solid var(--line);
  z-index:3;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-2);
}
.hero-card-title{font-weight: 950; margin-bottom: 10px}
.hero-card-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.mini-link{
  display:flex;
  align-items:center;
  justify-content:center;
  padding: 10px 10px;
  border-radius: 12px;
  background: rgba(249,115,22,.08);
  border:1px solid rgba(249,115,22,.14);
  color: rgba(15,23,42,.92);
  font-weight: 850;
  font-size: 13px;
}
.mini-link:hover{
  background: rgba(249,115,22,.14);
}

/* ---------------- Sections ---------------- */
.section{padding: 64px 0}
.section-head{margin-bottom: 22px;}
.section-title{
  margin:0 0 10px;
  font-size: 30px;
  letter-spacing: -.2px;
  color: rgba(15,23,42,.96);
}
.section-desc{
  margin:0;
  color: var(--muted);
  line-height: 1.75;
  max-width: 820px;
}

.trust{
  padding: 18px 0 8px;
}
.trust-title{
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 12px;
}
.trust-logos{
  display:flex;
  gap: 12px;
  flex-wrap:wrap;
  align-items:center;
  opacity:.95;
}
.trust-logos img{
  height: 42px;
  width: auto;
  border-radius: 12px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.88);
  padding: 8px 10px;
}

/* Cards */
.cards-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.card{
  border-radius: var(--radius);
  padding: 18px 18px;
  background: rgba(255,255,255,.88);
  border:1px solid var(--line);
  box-shadow: var(--shadow-2);
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.card:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.card-icon{
  font-size: 22px;
  margin-bottom: 10px;
  color: var(--accent);
}
.card-title{margin:0 0 8px; font-size: 18px; font-weight: 950}
.card-desc{margin:0 0 12px; color: var(--muted); line-height: 1.7}
.card-list{
  margin:0;
  padding-left: 18px;
  color: rgba(15,23,42,.90);
  line-height: 1.9;
  font-size: 14px;
}
.card-link{
  display:inline-flex;
  margin-top: 12px;
  color: #ea580c;
  font-weight: 950;
}

/* Steps */
.steps{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.step{
  border-radius: 18px;
  padding: 16px 16px;
  background: rgba(255,255,255,.88);
  border: 1px solid var(--line);
  display:flex;
  gap: 12px;
  box-shadow: var(--shadow-2);
}
.step-num{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display:grid;
  place-items:center;
  font-weight: 950;
  background: var(--accent-soft);
  border: 1px solid rgba(249,115,22,.18);
  color: #9a3412;
}
.step-title{font-weight: 950; margin-bottom: 6px}
.step-desc{color: var(--muted); line-height: 1.6; font-size: 13px}

/* Cases */
.case-grid{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.case{
  border-radius: 18px;
  overflow:hidden;
  background: rgba(255,255,255,.92);
  border:1px solid var(--line);
  box-shadow: var(--shadow-2);
  transition: transform .2s ease, box-shadow .2s ease;
}
.case:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.case img{
  width:100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}
.case-meta{padding: 12px 12px;}
.case-title{font-weight: 950; margin-bottom: 4px}
.case-sub{color: var(--muted); font-size: 13px; line-height: 1.45}

.center{display:flex; justify-content:center; margin-top: 16px}

/* Form */
.form-wrap{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 14px;
}
.form{
  border-radius: var(--radius);
  padding: 18px 18px;
  background: rgba(255,255,255,.92);
  border:1px solid var(--line);
  box-shadow: var(--shadow-2);
}
.form-row{
  display:flex;
  flex-direction:column;
  gap: 8px;
  margin-bottom: 12px;
}
.form-row.full{grid-column: 1 / -1}
label{font-size: 13px; color: rgba(15,23,42,.92); font-weight: 950}
input,select,textarea{
  border-radius: 14px;
  border:1px solid rgba(15,23,42,.14);
  background: rgba(255,255,255,.92);
  color: rgba(15,23,42,.95);
  padding: 12px 12px;
  outline:none;
}
input:focus,select:focus,textarea:focus{
  border-color: rgba(249,115,22,.55);
  box-shadow: 0 0 0 6px rgba(249,115,22,.12);
}
.btn.full{width:100%}

.form-hint{
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.form-side .side-card{
  border-radius: var(--radius);
  padding: 18px 18px;
  background: rgba(255,255,255,.92);
  border:1px solid var(--line);
  box-shadow: var(--shadow-2);
}
.side-title{font-weight: 950; margin-bottom: 12px}
.side-item{
  display:flex;
  justify-content:space-between;
  gap: 10px;
  padding: 10px 0;
  border-bottom:1px dashed rgba(15,23,42,.14);
}
.side-item:last-of-type{border-bottom:none}
.side-item span{color: var(--muted)}
.divider{
  border:0;
  height:1px;
  background: rgba(15,23,42,.10);
  margin: 14px 0;
}
.qr-row{display:flex; gap: 12px}
.qr{
  flex: 1;
  text-align:center;
  border-radius: 16px;
  padding: 12px 10px;
  background: rgba(249,115,22,.06);
  border:1px solid rgba(249,115,22,.14);
}
.qr img{margin:0 auto; border-radius: 12px}
.qr-label{margin-top: 8px; font-weight: 950; color: rgba(15,23,42,.95)}

/* Footer */
.footer{
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(15,23,42,.92), rgba(15,23,42,.98));
  color: rgba(255,255,255,.92);
}
.footer-grid{
  padding: 34px 0;
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 16px;
}
.footer-title{font-weight: 950; margin-bottom: 12px}
.footer-sub{color: rgba(255,255,255,.70); line-height: 1.7; font-size: 13px}
.footer-link{
  display:block;
  padding: 8px 0;
  color: rgba(255,255,255,.86);
  opacity:.92;
}
.footer-link:hover{color: #fdba74}
.footer-meta{
  margin-top: 12px;
  color: rgba(255,255,255,.70);
  line-height: 1.9;
  font-size: 13px
}
.footer-brand{display:flex; gap: 12px; align-items:flex-start}
.footer-qr{display:flex; gap: 12px}

.footer-bottom{
  border-top: 1px solid rgba(255,255,255,.10);
  padding: 14px 0;
  color: rgba(255,255,255,.70);
  font-size: 13px;
}
.footer-bottom-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
}
.footer-mini{color: rgba(255,255,255,.75)}
.footer-mini:hover{color: #fdba74}
.footer-small{display:flex; gap: 10px; align-items:center}

/* Reveal animation */
.reveal{
  opacity:0;
  transform: translateY(10px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.is-in{
  opacity:1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 980px){
  .hero-inner{grid-template-columns: 1fr; gap: 16px}
  .carousel-stage{height: 420px}
  .hero-card{position:static; width:auto; margin: 14px}
  .cards-3{grid-template-columns: 1fr; }
  .steps{grid-template-columns: 1fr 1fr}
  .case-grid{grid-template-columns: 1fr 1fr}
  .form-wrap{grid-template-columns: 1fr}
  .footer-grid{grid-template-columns: 1fr 1fr}
  .nav{display:none}
  .hamburger{display:inline-grid; place-items:center}
  .topbar-contact{display:none}
  .mobile-menu{display:none}
  .mobile-menu.is-open{display:block}
}

@media (max-width: 520px){
  .hero-title{font-size: 34px}
  .steps{grid-template-columns: 1fr}
  .case-grid{grid-template-columns: 1fr}
  .footer-grid{grid-template-columns: 1fr}
  .footer-bottom-inner{flex-direction:column; align-items:flex-start}
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  .reveal{transition:none}
  .carousel-slide{transition:none}
  .btn{transition:none}
}

/* =========================
   Offer Wall (ADD-ON)
   ========================= */
.offer-wall-section{
  position: relative;
}

.offer-wall-shell{
  position: relative;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.92);
  box-shadow: var(--shadow);
  overflow: hidden;

  /* 背景图随便换：改这里即可 */
  --offer-wall-bg: url("https://placehold.co/1600x900/png?text=Offer+Wall+Background");
}

/* 背景图层（轻微虚化，不抢内容） */
.offer-wall-shell::before{
  content:"";
  position:absolute;
  inset:0;
  background-image: var(--offer-wall-bg);
  background-size: cover;
  background-position: center;
  filter: blur(10px);
  opacity: .18;
  transform: scale(1.06);
}

/* 视窗：里面自动滚动 */
.offer-wall-viewport{
  position: relative;
  z-index: 1;
  height: 680px;
  overflow: hidden;
}

/* 顶/底渐隐，让滚动更高级 */
.offer-wall-fade{
  position:absolute;
  left:0; right:0;
  height: 110px;
  z-index: 2;
  pointer-events:none;
}
.offer-wall-fade.top{
  top:0;
  background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,0));
}
.offer-wall-fade.bottom{
  bottom:0;
  background: linear-gradient(0deg, rgba(255,255,255,.96), rgba(255,255,255,0));
}

/* JS会往里塞两份 track，形成无缝循环 */
.offer-track-wrap{
  will-change: transform;
}

.offer-track{
  display:grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  padding: 16px;
}

/* 卡片 */
.offer-card{
  position: relative;
  border-radius: 18px;
  overflow:hidden;
  background: rgba(255,255,255,.96);
  border: 1px solid rgba(15,23,42,.10);
  box-shadow: var(--shadow-2);
  transform: translate3d(0,0,0);
}

.offer-card img{
  width:100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  display:block;
}

/* 角标 */
.offer-badge{
  position:absolute;
  top:10px; left:10px;
  z-index: 2;
  font-weight: 900;
  font-size: 12px;
  color: #fff;
  padding: 6px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 22px rgba(249,115,22,.18);
}

/* 底部信息条（半透明） */
.offer-meta{
  position:absolute;
  left:0; right:0; bottom:0;
  z-index:2;
  padding: 10px 10px 12px;
  background: linear-gradient(180deg, rgba(255,255,255,0), rgba(255,255,255,.92));
}
.offer-school{
  font-weight: 950;
  font-size: 13px;
  color: rgba(15,23,42,.95);
}
.offer-program{
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted);
}

/* hover 提升质感 */
.offer-card:hover{
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* 响应式列数 */
@media (max-width: 1100px){
  .offer-track{ grid-template-columns: repeat(5, 1fr); }
}
@media (max-width: 980px){
  .offer-track{ grid-template-columns: repeat(4, 1fr); }
  .offer-wall-viewport{ height: 620px; }
}
@media (max-width: 720px){
  .offer-track{ grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 520px){
  .offer-track{ grid-template-columns: repeat(2, 1fr); }
  .offer-wall-viewport{ height: 560px; }
}