/* ============================================================
   凯丰达官网 · 视觉增强层 v3 「墨金」
   加载在 style.css 之后：动效 / 质感 / 细节

   ── 目录索引 ──
   · 纸张噪点质感 / 阅读进度条
   · HERO Ken Burns 运镜 + 金色氛围光 + SCROLL呼吸
   · 鎏金按钮扫光 / 卡片金线 / reveal节奏 / 数据带金箔微光
   · 悬浮联系按钮（极简线性图标）/ 走马灯金粉分隔
   · 案例橱窗微缩放 / 画廊图注显影 / 标题金线入场 / 表单聚焦金晕
   · 微信反馈投影 / 滚动条 / 选中文字 / 链接下划线动效
   · reduced motion / 微信二维码弹窗 / 汉堡按钮可见性
   · 图集卡片小轮播 / 客户故事眉标 / 新闻列表页
   ============================================================ */

/* ===== 纸张噪点质感（全站极淡颗粒，营造印刷纸感） ===== */
body::before{
  content:"";position:fixed;inset:0;z-index:9998;pointer-events:none;opacity:.028;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ===== 阅读进度条（main-enhance.js 注入） ===== */
.progress-bar{position:fixed;top:0;left:0;height:2px;background:linear-gradient(90deg,var(--gold-3),var(--gold-2));z-index:200;width:0;transition:width .15s ease;box-shadow:0 0 10px rgba(226,197,134,.6)}

/* ===== HERO：Ken Burns 运镜 + 入场节奏 ===== */
.hero-bg{animation:kenBurns 22s ease-in-out infinite alternate;will-change:transform}
@keyframes kenBurns{
  0%{transform:scale(1.02) translate(0,0)}
  100%{transform:scale(1.12) translate(1.4%,-1.2%)}
}
/* 金色氛围光 */
.hero::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(circle at 82% 18%,rgba(226,197,134,.10) 0%,transparent 46%),
             radial-gradient(circle at 12% 86%,rgba(201,161,92,.07) 0%,transparent 42%)}
.hero .eyebrow{animation:riseIn .9s .1s var(--ease) both}
.hero h1{animation:riseIn 1s .25s var(--ease) both}
.hero .hero-sub{animation:riseIn 1s .4s var(--ease) both}
.hero p{animation:riseIn 1s .55s var(--ease) both}
.hero .cta{animation:riseIn 1s .7s var(--ease) both}
.hero .badges{animation:riseIn 1s .85s var(--ease) both}
@keyframes riseIn{from{opacity:0;transform:translateY(34px)}to{opacity:1;transform:none}}
/* SCROLL 提示呼吸 */
.scroll-ind{animation:scrollPulse 2.4s ease-in-out infinite}
@keyframes scrollPulse{0%,100%{opacity:.55}50%{opacity:1}}

/* ===== 鎏金按钮扫光 ===== */
.btn{position:relative;overflow:hidden}
.btn::after{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.45),transparent);transform:skewX(-18deg);transition:left .65s var(--ease)}
.btn:hover::after{left:130%}

/* ===== 卡片金线（顶部显影） ===== */
.strength-card::before,.doubt-card::before,.craft-card::before,.hub-card::before,.proc-step::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
  transform:scaleX(0);transform-origin:center;transition:transform .5s var(--ease)
}
.strength-card:hover::before,.doubt-card:hover::before,.craft-card:hover::before,.hub-card:hover::before,.proc-step:hover::before{transform:scaleX(1)}

/* ===== reveal 节奏（子元素错峰入场） ===== */
.grid.strength > .reveal:nth-child(2){transition-delay:.08s}
.grid.strength > .reveal:nth-child(3){transition-delay:.16s}
.grid.strength > .reveal:nth-child(4){transition-delay:.24s}
.grid.strength > .reveal:nth-child(5){transition-delay:.32s}
.grid.strength > .reveal:nth-child(6){transition-delay:.4s}
.prod-grid > .reveal:nth-child(2){transition-delay:.07s}
.prod-grid > .reveal:nth-child(3){transition-delay:.14s}
.prod-grid > .reveal:nth-child(4){transition-delay:.21s}
.prod-grid > .reveal:nth-child(5){transition-delay:.28s}
.prod-grid > .reveal:nth-child(6){transition-delay:.35s}

/* ===== 数据统计带：金箔数字微光 ===== */
.stat{transition:transform .35s var(--ease),box-shadow .35s}
.stat .num{background:linear-gradient(120deg,var(--gold-2) 20%,#F4E3B8 50%,var(--gold-2) 80%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.stat .num .u{-webkit-text-fill-color:var(--gold);color:var(--gold)}

/* ===== 悬浮联系按钮（极简线性图标：无圆球填充 / 无渐变 / 无黑影） ===== */
.float-contact{position:fixed;bottom:28px;right:28px;z-index:150;display:flex;flex-direction:column;gap:12px}
.float-contact a{position:relative;width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--ink);text-decoration:none;background:rgba(255,255,255,.94);border:1px solid rgba(201,161,92,.55);box-shadow:0 4px 14px rgba(20,15,10,.10);transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.float-contact a:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(20,15,10,.16);border-color:rgba(201,161,92,.9)}
.float-contact .fc-phone,.float-contact .fc-wechat,.float-contact .fc-top{color:var(--ink)}
.float-contact button.float-btn{position:relative;width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--ink);text-decoration:none;background:rgba(255,255,255,.94);border:1px solid rgba(201,161,92,.55);box-shadow:0 4px 14px rgba(20,15,10,.10);transition:transform .25s var(--ease),box-shadow .25s,border-color .25s;cursor:pointer}
.float-contact button.float-btn:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(20,15,10,.16);border-color:rgba(201,161,92,.9)}
.float-contact .float-btn svg{width:22px;height:22px}
@media(max-width:768px){.float-contact button.float-btn{width:42px;height:42px}.float-contact .float-btn svg{width:20px;height:20px}}
@media(max-width:768px){.float-contact{bottom:24px;right:20px;gap:10px}.float-contact a{width:42px;height:42px}}
/* 手机端底部留白，防止悬浮按钮遮挡内容 */
@media(max-width:768px){body{padding-bottom:90px}}
/* 手机端右侧留白，防止悬浮按钮遮挡正文右侧 */
@media(max-width:768px){.section .container,.footer .container{padding-right:60px}}
/* 手机端"鼠标悬停"改为"长按" */
@media(max-width:768px){.dt-hint::before{content:"长按看大图"} .dt-hint{font-size:0} .dt-hint::before{font-size:13px;color:var(--muted);letter-spacing:.04em}}

/* ===== 走马灯金色分隔符微光 ===== */
.kw-track .kw-item::after{text-shadow:0 0 12px rgba(226,197,134,.6)}

/* ===== 案例橱窗：图片微缩放 ===== */
.case-showcase .case-card{transition:transform .45s var(--ease),box-shadow .45s,background-size .8s var(--ease);background-size:100% auto}
.case-showcase .case-card:hover{background-size:105% auto}

/* ===== 画廊图注显影 ===== */
.gallery figure{transition:box-shadow .4s,border-color .4s}
.gallery figure:hover{box-shadow:var(--shadow-lg);border-color:rgba(201,161,92,.5)}

/* ===== 标题金线入场 ===== */
.h-underline::after{transform:translateX(-50%) scaleX(0);transform-origin:center;transition:transform .8s .3s var(--ease)}
.reveal.in .h-underline::after{transform:translateX(-50%) scaleX(1)}

/* ===== 表单聚焦金晕 ===== */
.field input:focus,.field textarea:focus,.field select:focus{background:#fff}

/* ===== 微信反馈截图：细腻投影 ===== */
.feedback-strip figure{background:linear-gradient(180deg,#fff,#FDFBF5)}

/* ===== 滚动条 ===== */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-track{background:var(--paper-2)}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--gold),var(--gold-3));border-radius:5px;border:2px solid var(--paper-2)}
::-webkit-scrollbar-thumb:hover{background:var(--gold-3)}

/* ===== 选中文字 ===== */
::selection{background:rgba(201,161,92,.3);color:var(--ink)}

/* ===== 链接下划线动效（正文类） ===== */
.article-body a,.ti-v a,.proof-body a{color:var(--gold-3);text-decoration:underline;text-underline-offset:3px;transition:color .2s}
.article-body a:hover,.ti-v a:hover,.proof-body a:hover{color:var(--brand-dark)}

/* ===== reduced motion ===== */
@media(prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  body::before{display:none}
  .hero-bg{animation:none}
  .h-underline::after{transform:translateX(-50%) scaleX(1)}
  /* 关键词跑马灯为低速无闪烁的文字带，属品牌展示，reduced-motion 下仍保留滚动（不破坏 hover 暂停） */
  .kw-track{animation-name:kwMarquee !important;animation-duration:90s !important;animation-timing-function:linear !important;animation-iteration-count:infinite !important}
}

/* ===== 微信二维码弹窗 ===== */
.wx-overlay{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:rgba(20,15,10,.62);backdrop-filter:blur(3px);opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.wx-overlay.show{opacity:1;visibility:visible}
.wx-popup{background:#fff;border-radius:16px;padding:28px 28px 24px;text-align:center;max-width:300px;box-shadow:0 20px 60px rgba(0,0,0,.3);transform:scale(.9);transition:transform .3s var(--ease)}
.wx-overlay.show .wx-popup{transform:scale(1)}
.wx-popup img{width:220px;height:220px;object-fit:cover;border-radius:10px;border:1px solid var(--line,#e7ddc9);display:block;margin:0 auto 14px}
.wx-popup h4{font-size:16px;color:var(--ink,#2a2520);margin:0 0 4px}
.wx-popup p{font-size:13px;color:var(--muted,#999);margin:0 0 16px}
.wx-popup .wx-close{display:inline-block;padding:7px 24px;font-size:14px;color:var(--ink-soft,#666);background:var(--paper-2,#f5f3ee);border:1px solid var(--line,#e7ddc9);border-radius:8px;cursor:pointer;transition:background .2s,border-color .2s}
.wx-popup .wx-close:hover{background:#eee;border-color:var(--gold-3,#b8860b)}
.wx-popup .wx-num{color:var(--gold-3,#b8860b);font-weight:600;cursor:pointer;border-bottom:1px dashed var(--gold-3,#b8860b);transition:color .2s}
.wx-popup .wx-num:hover{color:var(--gold-2,#daa520)}
.wx-popup .wx-num.copied{color:#07c160;border-color:#07c160}
.wx-popup .wx-num.copied::after{content:" ✓已复制";font-size:12px;color:#07c160}

/* ===== 移动端：深色 Hero 上的汉堡按钮可见性 ===== */
@media(max-width:768px){
  body:has(.hero) .nav:not(.scrolled) .menu-btn span{background:#F7F3EA;box-shadow:0 1px 4px rgba(0,0,0,.4)}
}

/* ===== 图集卡片 · 卡片内小轮播（多图产品） ===== */
.zc-carousel{position:relative;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .3s var(--ease),box-shadow .3s,border-color .3s}
.zc-carousel:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(201,161,92,.5)}
.zc-viewport{position:relative;width:100%;aspect-ratio:4/3;overflow:hidden;background:var(--paper-2)}
.zc-track{display:flex;height:100%;transition:transform .45s var(--ease)}
.zc-slide{flex:0 0 100%;height:100%}
.zc-slide img{width:100%;height:100%;object-fit:cover;display:block;cursor:zoom-in;background:var(--paper-2)}
.zc-nav{position:absolute;top:50%;transform:translateY(-50%);width:34px;height:34px;border:none;border-radius:50%;background:rgba(20,15,10,.42);color:#fff;font-size:22px;line-height:34px;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .25s,background .2s;z-index:3;padding:0}
.zc-carousel:hover .zc-nav{opacity:1}
.zc-nav:hover{background:rgba(20,15,10,.66)}
.zc-nav.prev{left:8px}.zc-nav.next{right:8px}
.zc-dots{position:absolute;left:0;right:0;bottom:9px;display:flex;gap:6px;justify-content:center;z-index:3;pointer-events:none}
.zc-dot{width:7px;height:7px;border-radius:50%;background:rgba(255,255,255,.6);border:none;padding:0;pointer-events:auto;cursor:pointer;transition:all .25s var(--ease)}
.zc-dot.active{background:var(--gold-3);width:18px;border-radius:4px}
.zc-cap{padding:12px 15px;font-size:13.5px;color:var(--ink-soft);display:flex;justify-content:space-between;align-items:center;gap:8px}
.zc-cap::after{content:"⌕";font-size:17px;color:var(--gold-3);flex:none}
.zc-carousel.is-single .zc-viewport{cursor:zoom-in}

/* ===== 客户故事版块：眉标独占一行，不与标题挤同行 ===== */
.section-story .cg-kicker{display:block;margin-bottom:8px}

/* ===== 新闻列表页 article/index.html ===== */
.news-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px;margin-top:30px}
.news-item{background:var(--paper,#fff);border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(20,15,10,.06);transition:box-shadow .3s var(--ease),transform .3s var(--ease)}
.news-item:hover{box-shadow:0 6px 24px rgba(20,15,10,.12);transform:translateY(-3px)}
.news-link{display:flex;flex-direction:column;text-decoration:none;color:inherit;height:100%}
.news-thumb{width:100%;height:180px;background-size:cover;background-position:center;background-color:var(--paper-2,#f5f3ee);flex:none}
.news-info{padding:18px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.news-cat{display:inline-block;width:fit-content;font-size:12px;font-weight:600;color:var(--gold-3,#b8860b);background:var(--paper-2,#f5f3ee);padding:3px 10px;border-radius:4px}
.news-info h3{font-size:17px;line-height:1.5;color:var(--ink,#2a2520);margin:0}
.news-grid .card .body h3{word-break:break-word;hyphens:auto;line-height:1.45}
.news-grid .card .body .eyebrow{text-align:left}
.page-nav{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:36px;padding-top:24px;flex-wrap:wrap}
.page-nav .page-active,.page-nav a.page-link{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 12px;border-radius:8px;font-size:14px;font-weight:600;text-decoration:none;color:var(--ink,#2a2520);background:rgba(255,255,255,.94);border:1px solid rgba(201,161,92,.4);transition:all .2s}
.page-nav .page-active{background:var(--gold-3,#b8860b);color:#fff;border-color:var(--gold-3,#b8860b)}
.page-nav a.page-link:hover{border-color:var(--gold-3,#b8860b);color:var(--gold-3,#b8860b)}
.page-nav .page-disabled{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 12px;border-radius:8px;font-size:14px;color:var(--muted,#999);background:transparent;border:1px solid rgba(201,161,92,.2);cursor:not-allowed}
.page-nav .page-info{width:100%;text-align:center;font-size:13px;color:var(--muted,#999);margin-top:8px}
.news-info p{font-size:14px;line-height:1.6;color:var(--ink-soft,#666);margin:0;flex:1}
.news-info time{font-size:12px;color:var(--muted,#999)}
@media(max-width:680px){.news-list{grid-template-columns:1fr;gap:18px}.news-thumb{height:150px}}