/* =========================================================================
   乐游香山 · 古城江畔研学导赏专线 —— 介绍网站设计系统
   主线：香山生活进化线（老街 → 江畔）
   基调：侨乡墨 + 鎏金；老街段沉稳人文，江畔段明亮现代
   适配：手机端 + 电脑端自适应
   ========================================================================= */

:root {
  /* —— 老街 / 古城（沉稳人文）—— */
  --ink:        #1c2b33;   /* 侨乡墨 */
  --ink-2:      #2a3d46;
  --red:        #b5331f;   /* 灯笼红 */
  --red-deep:   #8c2417;
  --gold:       #b08a43;   /* 鎏金 */
  --gold-2:     #cBa35a;
  --gold-soft:  #efe2c6;
  --paper:      #f6f1e7;   /* 暖纸底 */
  --paper-2:    #efe7d7;

  /* —— 江畔 / 新城（明亮现代）—— */
  --aqua:       #0f8aa3;   /* 岐江/海洋青 */
  --aqua-2:     #13a7c2;
  --aqua-deep:  #0a6478;
  --aqua-soft:  #e2f1f4;

  --card:       #ffffff;
  --line:       #e6ddcc;
  --line-soft:  #efe9dd;
  --text:       #28323a;
  --muted:      #6f7a7e;
  --white:      #ffffff;

  --shadow-sm: 0 2px 10px rgba(28,40,48,.06);
  --shadow:    0 12px 34px rgba(28,40,48,.10);
  --shadow-lg: 0 26px 60px rgba(28,40,48,.18);

  --radius:    18px;
  --radius-sm: 12px;
  --radius-lg: 26px;
  --maxw: 1180px;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --sans:  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -5%, rgba(176,138,67,.07), transparent 60%),
    var(--paper);
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4 { font-family: var(--serif); font-weight: 700; line-height: 1.28; color: var(--ink); margin: 0; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.muted { color: var(--muted); }
.serif { font-family: var(--serif); }

/* —— 通用：节标签 + 标题 —— */
.kicker {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--serif); font-size: 14px; letter-spacing: 3px;
  color: var(--gold); font-weight: 700;
  text-transform: none; margin-bottom: 16px;
}
.kicker::before {
  content: ""; width: 26px; height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
}
.kicker.on-dark { color: var(--gold-2); }
.kicker.aqua { color: var(--aqua); }
.kicker.aqua::before { background: linear-gradient(90deg, var(--aqua), transparent); }

.sec-title { font-size: clamp(26px, 4.4vw, 40px); letter-spacing: 1px; }
.sec-lead  { color: var(--muted); font-size: clamp(15px, 1.7vw, 17.5px); max-width: 720px; margin: 16px 0 0; }

section { position: relative; }
.pad { padding: clamp(64px, 9vw, 116px) 0; }

/* —— 按钮 —— */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px; font-size: 15.5px; font-weight: 600;
  font-family: var(--sans); cursor: pointer; border: none;
  transition: transform .18s ease, box-shadow .2s ease, filter .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-gold  { background: linear-gradient(135deg, var(--gold-2), var(--gold)); color: #2a210e; box-shadow: 0 10px 26px rgba(176,138,67,.36); }
.btn-gold:hover { filter: brightness(1.05); }
.btn-ink   { background: var(--ink); color: #fff; box-shadow: var(--shadow-sm); }
.btn-ink:hover { background: var(--ink-2); }
.btn-aqua  { background: linear-gradient(135deg, var(--aqua-2), var(--aqua)); color: #fff; box-shadow: 0 10px 26px rgba(15,138,163,.34); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.5); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }
.btn-line  { background: #fff; color: var(--ink); border: 1px solid var(--line); box-shadow: var(--shadow-sm); }

/* =========================================================================
   顶部导航
   ========================================================================= */
.topbar {
  position: sticky; top: 0; z-index: 80;
  background: rgba(246,241,231,.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s, box-shadow .3s;
}
.topbar.scrolled { background: rgba(246,241,231,.96); border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }
.topbar .wrap { display: flex; align-items: center; gap: 16px; height: 66px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .seal {
  width: 42px; height: 42px; border-radius: 11px; flex: none;
  background: linear-gradient(145deg, var(--red), var(--red-deep));
  color: #fff; font-family: var(--serif); font-weight: 700; font-size: 21px;
  display: grid; place-items: center; box-shadow: var(--shadow-sm);
  position: relative;
}
.brand .seal::after { content:""; position:absolute; inset:4px; border:1px solid rgba(255,255,255,.4); border-radius:7px; }
.brand b { font-family: var(--serif); font-size: 20px; color: var(--ink); letter-spacing: 1.5px; line-height: 1.1; }
.brand small { display: block; font-size: 10.5px; color: var(--muted); letter-spacing: 1.6px; }

.nav { display: flex; gap: 2px; margin-left: auto; align-items: center; }
.nav a {
  padding: 8px 14px; border-radius: 999px; font-size: 14.5px; color: var(--ink-2);
  transition: background .2s, color .2s; position: relative;
}
.nav a:hover { background: var(--gold-soft); color: var(--ink); }
.nav a.active { color: var(--gold); }
.nav .nav-cta { margin-left: 8px; background: var(--ink); color: #fff; font-weight: 600; padding: 9px 20px; }
.nav .nav-cta:hover { background: var(--ink-2); color: #fff; }

.hamb { display: none; margin-left: auto; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; position: relative; }
.hamb span, .hamb span::before, .hamb span::after {
  content: ""; position: absolute; left: 50%; width: 20px; height: 2px; background: var(--ink); border-radius: 2px;
  transform: translateX(-50%); transition: transform .25s, opacity .2s;
}
.hamb span { top: 50%; margin-top: -1px; }
.hamb span::before { top: -7px; } .hamb span::after { top: 7px; }
.hamb.open span { background: transparent; }
.hamb.open span::before { transform: translateX(-50%) translateY(7px) rotate(45deg); }
.hamb.open span::after  { transform: translateX(-50%) translateY(-7px) rotate(-45deg); }

/* 移动菜单抽屉 */
.mobile-menu {
  position: fixed; inset: 66px 0 auto 0; z-index: 70;
  background: var(--paper); border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow); padding: 10px 22px 22px;
  transform: translateY(-130%); transition: transform .34s cubic-bezier(.2,.7,.2,1);
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu a { display: block; padding: 13px 6px; font-size: 16px; border-bottom: 1px solid var(--line-soft); color: var(--ink-2); font-family: var(--serif); }
.mobile-menu a:last-child { border: none; }
.mobile-menu .btn { width: 100%; margin-top: 14px; }

/* =========================================================================
   HERO
   ========================================================================= */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg .ph {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: 0; transform: scale(1.08); transition: opacity 1.4s ease;
  animation: kenburns 18s ease-in-out infinite alternate;
}
.hero-bg .ph.show { opacity: 1; }
@keyframes kenburns { from { transform: scale(1.04); } to { transform: scale(1.14); } }
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(20,28,33,.62) 0%, rgba(20,28,33,.30) 38%, rgba(20,28,33,.55) 78%, rgba(20,28,33,.86) 100%),
    linear-gradient(105deg, rgba(20,28,33,.66) 0%, rgba(20,28,33,.10) 60%);
}
.hero .wrap { position: relative; z-index: 2; padding-top: 70px; padding-bottom: 70px; width: 100%; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 12px; color: #f3e7cc;
  font-family: var(--serif); letter-spacing: 4px; font-size: 14px; margin-bottom: 22px;
  border: 1px solid rgba(243,231,204,.4); padding: 7px 18px; border-radius: 999px;
  background: rgba(20,28,33,.25); backdrop-filter: blur(3px);
}
.hero h1 {
  color: #fff; font-size: clamp(44px, 9vw, 96px); letter-spacing: 4px; line-height: 1.04;
  text-shadow: 0 4px 30px rgba(0,0,0,.4);
}
.hero h1 .x { color: var(--gold-2); font-style: normal; margin: 0 .12em; }
.hero h1 .aqua-w { color: #7fd6e4; }
.hero .sub { color: #f4ede0; font-size: clamp(17px, 2.5vw, 23px); font-family: var(--serif); letter-spacing: 1px; margin: 22px 0 6px; }
.hero .desc { color: rgba(255,255,255,.86); max-width: 640px; font-size: clamp(14.5px,1.7vw,16.5px); margin: 14px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 0; margin-top: 44px; border-top: 1px solid rgba(255,255,255,.18); padding-top: 22px; }
.hero-meta .m { padding-right: 34px; margin-right: 34px; border-right: 1px solid rgba(255,255,255,.18); }
.hero-meta .m:last-child { border-right: none; }
.hero-meta .m b { display: block; font-family: var(--serif); font-size: 26px; color: var(--gold-2); }
.hero-meta .m span { color: rgba(255,255,255,.8); font-size: 13.5px; }

.scroll-cue { position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%); z-index: 3; color: rgba(255,255,255,.7); font-size: 12px; letter-spacing: 2px; text-align: center; }
.scroll-cue i { display: block; width: 1px; height: 34px; margin: 8px auto 0; background: rgba(255,255,255,.5); animation: cue 1.8s ease-in-out infinite; transform-origin: top; }
@keyframes cue { 0%,100%{ transform: scaleY(.3); opacity:.3 } 50%{ transform: scaleY(1); opacity:1 } }

/* =========================================================================
   缘起 / 双主轴
   ========================================================================= */
.bg-paper2 { background: var(--paper-2); }
.bg-ink { background: var(--ink); color: #e9eef0; }
.bg-ink h2, .bg-ink h3 { color: #fff; }

.origin-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.problem-list { display: grid; gap: 14px; margin: 26px 0 0; }
.problem {
  display: flex; gap: 16px; align-items: flex-start; background: var(--card);
  border: 1px solid var(--line); border-left: 4px solid var(--red); border-radius: var(--radius-sm);
  padding: 16px 18px; box-shadow: var(--shadow-sm);
}
.problem .pi { font-family: var(--serif); font-size: 20px; color: var(--red); flex: none; line-height: 1.5; }
.problem b { color: var(--ink); }
.problem p { margin: 2px 0 0; font-size: 14.5px; color: var(--muted); }

.origin-photo { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); aspect-ratio: 4/5; }
.origin-photo img { width: 100%; height: 100%; object-fit: cover; }
.origin-photo .tag {
  position: absolute; left: 0; bottom: 0; right: 0; padding: 24px 22px 18px;
  background: linear-gradient(0deg, rgba(20,28,33,.86), transparent);
  color: #fff;
}
.origin-photo .tag b { font-family: var(--serif); font-size: 19px; display: block; }
.origin-photo .tag span { font-size: 13px; color: rgba(255,255,255,.82); }

.bridge {
  margin-top: 22px; background: linear-gradient(135deg, var(--ink), var(--ink-2));
  color: #fff; border-radius: var(--radius); padding: 26px 30px; box-shadow: var(--shadow);
  position: relative; overflow: hidden;
}
.bridge::before { content: "“"; position: absolute; right: 20px; top: -10px; font-family: var(--serif); font-size: 120px; color: rgba(176,138,67,.18); }
.bridge b { color: var(--gold-2); }
.bridge .hl { background: linear-gradient(transparent 60%, rgba(176,138,67,.35) 60%); padding: 0 2px; }

/* —— 双主轴 / 定位 —— */
.axis-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 40px; }
.axis-card { border-radius: var(--radius); padding: 32px 30px; color: #fff; position: relative; overflow: hidden; min-height: 230px; box-shadow: var(--shadow); }
.axis-card.old { background: linear-gradient(150deg, #2a3d46, #1c2b33); }
.axis-card.new { background: linear-gradient(150deg, var(--aqua-2), var(--aqua-deep)); }
.axis-card .ico { font-size: 30px; margin-bottom: 12px; }
.axis-card h3 { color: #fff; font-size: 24px; }
.axis-card .en { font-size: 12px; letter-spacing: 3px; opacity: .65; text-transform: uppercase; }
.axis-card p { color: rgba(255,255,255,.86); font-size: 14.5px; margin: 10px 0 0; }
.axis-card .deco { position: absolute; right: -20px; bottom: -30px; font-family: var(--serif); font-size: 150px; opacity: .08; }

.three-do { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 26px; }
.do-item { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 22px; box-shadow: var(--shadow-sm); }
.do-item .n { font-family: var(--serif); color: var(--gold); font-size: 15px; letter-spacing: 2px; }
.do-item b { display: block; font-family: var(--serif); font-size: 18px; margin: 8px 0 6px; color: var(--ink); }
.do-item p { margin: 0; font-size: 14px; color: var(--muted); }

/* =========================================================================
   进化线（设计灵魂）—— 核心视觉
   ========================================================================= */
.evo { background:
    linear-gradient(180deg, var(--paper) 0%, #f2ece0 50%, var(--aqua-soft) 100%);
}
.evo-head { text-align: center; }
.evo-head .sec-lead { margin-left: auto; margin-right: auto; }
.evo-legend { display: inline-flex; gap: 22px; margin-top: 22px; flex-wrap: wrap; justify-content: center; }
.evo-legend span { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--muted); }
.evo-legend i { width: 12px; height: 12px; border-radius: 3px; }
.evo-legend .d-old { background: var(--ink); }
.evo-legend .d-new { background: var(--aqua); }

.evo-line { position: relative; margin: 54px auto 0; max-width: 980px; }
/* 中轴线：从鎏金渐变到江畔青 */
.evo-line::before {
  content: ""; position: absolute; left: 50%; top: 4px; bottom: 4px; width: 3px; transform: translateX(-50%);
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold-2) 35%, #6fb6c0 70%, var(--aqua) 100%);
  border-radius: 3px;
}
.evo-row { position: relative; display: grid; grid-template-columns: 1fr 76px 1fr; align-items: center; margin-bottom: 30px; }
.evo-row:last-child { margin-bottom: 0; }
.evo-node {
  width: 24px; height: 24px; border-radius: 50%; margin: 0 auto; position: relative; z-index: 2;
  background: #fff; border: 3px solid var(--gold); box-shadow: 0 0 0 6px rgba(176,138,67,.14);
}
.evo-row:nth-child(n+4) .evo-node { border-color: var(--aqua); box-shadow: 0 0 0 6px rgba(15,138,163,.14); }
.evo-num { position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); font-family:var(--serif); font-size:11px; color:var(--gold); font-weight:700; }
.evo-row:nth-child(n+4) .evo-num { color: var(--aqua); }

.evo-card { border-radius: var(--radius-sm); padding: 18px 20px; box-shadow: var(--shadow-sm); border: 1px solid var(--line); }
.evo-card .lbl { font-size: 11.5px; letter-spacing: 2px; font-weight: 700; margin-bottom: 4px; }
.evo-card h4 { font-size: 20px; }
.evo-card.old { background: #fff; text-align: right; border-right: 4px solid var(--ink); }
.evo-card.old .lbl { color: var(--ink); }
.evo-card.new { background: linear-gradient(150deg,#fff, #f3fbfc); text-align: left; border-left: 4px solid var(--aqua); }
.evo-card.new .lbl { color: var(--aqua); }
.evo-note { grid-column: 1 / -1; text-align: center; font-size: 13px; color: var(--muted); margin-top: 10px; }
.evo-note .arr { color: var(--gold); font-weight: 700; }
.evo-foot { text-align: center; margin-top: 46px; font-family: var(--serif); font-size: clamp(17px,2.3vw,22px); color: var(--ink); }
.evo-foot .hl { color: var(--aqua-deep); }

/* =========================================================================
   运营闭环
   ========================================================================= */
.loop-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; margin-top: 44px; }
.loop-step { position: relative; padding: 0 18px; }
.loop-step:not(:last-child)::after {
  content: "→"; position: absolute; right: -10px; top: 30px; color: var(--gold-2); font-size: 24px; z-index: 2;
}
.loop-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius); padding: 26px 22px; height: 100%; backdrop-filter: blur(4px);
  transition: transform .25s, border-color .25s;
}
.loop-card:hover { transform: translateY(-6px); border-color: rgba(176,138,67,.6); }
.loop-card .cn { font-family: var(--serif); font-size: 40px; color: var(--gold-2); line-height: 1; }
.loop-card h4 { color: #fff; font-size: 19px; margin: 12px 0 8px; }
.loop-card p { color: rgba(233,238,240,.78); font-size: 13.8px; margin: 0; }
.loop-foot { text-align: center; margin-top: 40px; color: #cdd6d8; font-size: 15.5px; }
.loop-foot b { color: var(--gold-2); }

/* =========================================================================
   产品矩阵
   ========================================================================= */
.prod-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 44px; }
.prod-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); display: flex; flex-direction: column;
  transition: transform .25s, box-shadow .25s; position: relative;
}
.prod-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.prod-card.feature { border-color: var(--gold); box-shadow: 0 18px 50px rgba(176,138,67,.2); }
.prod-top { padding: 26px 24px 20px; position: relative; }
.prod-card.feature .prod-top { background: linear-gradient(150deg, #fbf3e2, #f7ead0); }
.prod-flag { position: absolute; top: 16px; right: 16px; background: var(--gold); color: #fff; font-size: 11.5px; padding: 4px 12px; border-radius: 999px; font-weight: 600; letter-spacing: 1px; }
.prod-name { font-family: var(--serif); font-size: 23px; color: var(--ink); }
.prod-sub { color: var(--muted); font-size: 13px; letter-spacing: 1px; margin-top: 2px; }
.prod-dur { display: inline-flex; align-items: baseline; gap: 4px; margin-top: 16px; }
.prod-dur b { font-family: var(--serif); font-size: 30px; color: var(--red); }
.prod-dur span { color: var(--muted); font-size: 13px; }
.prod-body { padding: 0 24px 24px; display: flex; flex-direction: column; gap: 14px; flex: 1; }
.prod-row { display: flex; gap: 10px; font-size: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }
.prod-row .k { color: var(--muted); flex: none; width: 62px; }
.prod-row .v { color: var(--text); }
.prod-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.prod-tags span { background: var(--gold-soft); color: #7c5e22; font-size: 12px; padding: 3px 10px; border-radius: 999px; }
.prod-book {
  margin-top: auto; display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 11px 16px; border-radius: 999px; font-weight: 600; font-size: 14.5px;
  border: 1px solid var(--gold); color: var(--gold); background: #fff;
  transition: background .2s, color .2s, transform .2s;
}
.prod-book:hover { background: var(--gold); color: #fff; transform: translateY(-2px); }
.prod-card.feature .prod-book { background: linear-gradient(135deg, var(--gold-2), var(--gold)); color: #2a210e; border-color: transparent; }
.prod-card.feature .prod-book:hover { filter: brightness(1.05); }
.prod-card.night .prod-book { margin: 0; border-color: #ffd27f; color: #ffd58a; background: transparent; white-space: nowrap; }
.prod-card.night .prod-book:hover { background: #ffd27f; color: #2a210e; }
.prod-card.night { background: linear-gradient(160deg, #16263a, #0d1825); border-color: #2a3d52; }
.prod-card.night .prod-name, .prod-card.night .prod-dur b { color: #fff; }
.prod-card.night .prod-dur b { color: #ffd27f; }
.prod-card.night .prod-sub, .prod-card.night .prod-row .v { color: #c3cdd6; }
.prod-card.night .prod-row { border-color: rgba(255,255,255,.14); }
.prod-card.night .prod-tags span { background: rgba(255,210,127,.16); color: #ffd58a; }
.prod-card.night .prod-dur span { color:#8ea0ad; }

/* =========================================================================
   点位地图（串珠成链）
   ========================================================================= */
.map-wrap { margin-top: 46px; display: grid; gap: 22px; }
.layer {
  border-radius: var(--radius-lg); padding: 30px clamp(20px,3vw,38px); position: relative; overflow: hidden;
}
.layer.old { background: linear-gradient(135deg, #fff, var(--paper-2)); border: 1px solid var(--line); }
.layer.new { background: linear-gradient(135deg, var(--aqua-deep), var(--aqua)); color: #fff; box-shadow: var(--shadow); }
.layer-head { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; flex-wrap: wrap; }
.layer-badge { font-family: var(--serif); font-size: 13px; letter-spacing: 2px; padding: 6px 14px; border-radius: 999px; font-weight: 700; }
.layer.old .layer-badge { background: var(--ink); color: #fff; }
.layer.new .layer-badge { background: rgba(255,255,255,.2); color: #fff; border: 1px solid rgba(255,255,255,.4); }
.layer h3 { font-size: 22px; }
.layer.new h3 { color: #fff; }
.layer .layer-sub { font-size: 13.5px; color: var(--muted); }
.layer.new .layer-sub { color: rgba(255,255,255,.85); }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px; background: #fff; border: 1px solid var(--line);
  border-radius: 999px; padding: 8px 15px; font-size: 14px; color: var(--ink-2); box-shadow: var(--shadow-sm);
  transition: transform .2s, border-color .2s;
}
.chip:hover { transform: translateY(-2px); border-color: var(--gold); }
.chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--red); flex: none; }
.chip.more { background: var(--gold-soft); border-color: var(--gold-soft); color: #7c5e22; font-weight: 600; }

.spots-new { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.spot {
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.22); border-radius: var(--radius-sm);
  padding: 20px 18px; backdrop-filter: blur(4px); transition: transform .25s, background .25s;
}
.spot:hover { transform: translateY(-5px); background: rgba(255,255,255,.18); }
.spot .si { font-size: 26px; }
.spot h4 { color: #fff; font-size: 16.5px; margin: 10px 0 6px; }
.spot p { font-size: 12.8px; color: rgba(255,255,255,.84); margin: 0; }
.spot .tagline { display: inline-block; margin-top: 12px; font-size: 11.5px; letter-spacing: 1px; color: #fff; background: rgba(255,255,255,.22); padding: 3px 10px; border-radius: 999px; }

.transit {
  text-align: center; margin: 4px 0; position: relative;
}
.transit span {
  display: inline-flex; align-items: center; gap: 10px; background: var(--gold);
  color: #fff; font-family: var(--serif); font-weight: 700; padding: 10px 26px; border-radius: 999px;
  box-shadow: 0 10px 24px rgba(176,138,67,.36); font-size: 15px; letter-spacing: 1px;
}

/* =========================================================================
   研学内容 gallery
   ========================================================================= */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 168px; gap: 14px; margin-top: 44px; }
.gallery figure { margin: 0; border-radius: var(--radius-sm); overflow: hidden; position: relative; box-shadow: var(--shadow-sm); }
.gallery figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.gallery figure:hover img { transform: scale(1.07); }
.gallery .g-tall { grid-row: span 2; }
.gallery .g-wide { grid-column: span 2; }
.gallery figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 16px 14px 12px; color: #fff; font-size: 13px;
  background: linear-gradient(0deg, rgba(20,28,33,.8), transparent); font-family: var(--serif);
}

/* =========================================================================
   多方价值
   ========================================================================= */
.value-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; margin-top: 44px; }
.value-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 28px; box-shadow: var(--shadow-sm); display: flex; gap: 18px; align-items: flex-start;
  transition: transform .25s, box-shadow .25s; border-top: 4px solid var(--gold);
}
.value-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.value-card .vi {
  width: 52px; height: 52px; border-radius: 14px; flex: none; display: grid; place-items: center;
  background: var(--gold-soft); color: var(--gold); font-size: 24px;
}
.value-card h4 { font-size: 18.5px; margin-bottom: 6px; }
.value-card p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* =========================================================================
   预约入口
   ========================================================================= */
.cta-sec { background: linear-gradient(160deg, var(--ink), #122029 60%, var(--aqua-deep)); color: #fff; }
.cta-sec .kicker { color: var(--gold-2); }
.cta-sec h2 { color: #fff; }
.enter-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; margin-top: 44px; }
.enter-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.16); border-radius: var(--radius);
  padding: 28px 22px; text-align: center; cursor: pointer; transition: transform .25s, background .25s, border-color .25s;
}
.enter-card:hover { transform: translateY(-7px); background: rgba(255,255,255,.12); border-color: var(--gold-2); }
.enter-card .ei { font-size: 34px; }
.enter-card h4 { color: #fff; font-size: 19px; margin: 14px 0 6px; }
.enter-card p { color: rgba(255,255,255,.74); font-size: 13.5px; margin: 0 0 16px; }
.enter-card .go { display: inline-flex; align-items: center; gap: 6px; color: var(--gold-2); font-size: 13.5px; font-weight: 600; }
.cta-final { text-align: center; margin-top: 48px; }
.cta-final .btn { margin: 6px; }
.cta-note { margin-top: 18px; color: rgba(255,255,255,.6); font-size: 13px; }

/* =========================================================================
   页脚
   ========================================================================= */
.footer { background: #14201b; color: #aebcb0; padding: 50px 0 30px; }
.footer .top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding-bottom: 26px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer .brand b { color: #fff; }
.footer .brand small { color: #8ba093; }
.footer .f-col h5 { color: #fff; font-family: var(--serif); font-size: 15px; margin: 0 0 10px; }
.footer .f-col a, .footer .f-col p { display: block; color: #aebcb0; font-size: 13.5px; margin: 5px 0; }
.footer .cols { display: flex; gap: 54px; flex-wrap: wrap; }
.footer .bottom { padding-top: 22px; font-size: 12.5px; color: #7e9286; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; }

/* =========================================================================
   滚动揭示动画
   ========================================================================= */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; } .reveal.d4 { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-bg .ph { animation: none; }
  html { scroll-behavior: auto; }
}

/* =========================================================================
   响应式
   ========================================================================= */
@media (max-width: 1080px) {
  .gallery { grid-template-columns: repeat(3,1fr); }
}
@media (max-width: 960px) {
  .nav { display: none; }
  .hamb { display: block; }
  .origin-grid { grid-template-columns: 1fr; gap: 34px; }
  .origin-photo { aspect-ratio: 16/11; max-height: 420px; }
  .loop-grid { grid-template-columns: repeat(2,1fr); gap: 18px; }
  .loop-step { padding: 0; }
  .loop-step:not(:last-child)::after { display: none; }
  .prod-grid { grid-template-columns: 1fr; max-width: 460px; margin-left: auto; margin-right: auto; }
  .spots-new { grid-template-columns: repeat(2,1fr); }
  .enter-grid { grid-template-columns: repeat(2,1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .three-do { grid-template-columns: 1fr; }
  .axis-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .wrap { padding: 0 18px; }
  .hero { min-height: 92svh; }
  .hero-meta .m { padding-right: 18px; margin-right: 18px; }
  .hero-meta .m b { font-size: 21px; }
  .gallery { grid-template-columns: repeat(2,1fr); grid-auto-rows: 130px; }
  .gallery .g-wide { grid-column: span 2; }
  .gallery .g-tall { grid-row: span 1; }

  /* 进化线：移动端改为左轴单列 */
  .evo-line { max-width: 520px; }
  .evo-line::before { left: 16px; }
  .evo-row { grid-template-columns: 34px 1fr; gap: 6px; margin-bottom: 18px; }
  .evo-node { margin: 0; width: 20px; height: 20px; }
  .evo-card { grid-column: 2; }
  .evo-card.old { text-align: left; border-right: none; border-left: 4px solid var(--ink); margin-bottom: 8px; }
  .evo-card.new { margin-top: 0; }
  .evo-note { grid-column: 2; text-align: left; margin-top: 0; margin-bottom: 4px; }
}
@media (max-width: 460px) {
  .spots-new, .enter-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1; }
}