/* ============================================================
   往莱轻创 · 在线图像处理  |  tx.wlqc.top
   蓝白科技风 · 品牌色取自 Logo（蓝 #2563EB / 青绿 #0D9488）
   ============================================================ */
:root {
  --blue: #2563eb;
  --blue-deep: #1d4ed8;
  --blue-dark: #1e40af;
  --blue-soft: #dbeafe;
  --blue-bg: #eff6ff;
  --teal: #0d9488;
  --teal-soft: #ccfbf1;
  --ink: #0f172a;
  --ink-2: #475569;
  --ink-3: #94a3b8;
  --line: #e2e8f0;
  --card: #ffffff;
  --bg: #f6f9ff;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(37, 99, 235, .08);
  --shadow-lg: 0 18px 46px rgba(15, 23, 42, .14);
  --grad: linear-gradient(135deg, #2563eb 0%, #0ea5e9 55%, #0d9488 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; }
img { max-width: 100%; display: block; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 22px; }

/* ---------- 顶部品牌导航（往莱旗下产品） ---------- */
.topnav {
  background: linear-gradient(180deg, #f2f7ff, #eaf2ff);
  border-bottom: 1px solid #dbe7fb;
}
.topnav-inner {
  display: flex; align-items: center; gap: 4px 14px;
  min-height: 36px; padding: 5px 0; flex-wrap: wrap;
}
.topnav .tn-label { font-size: 12px; font-weight: 800; color: var(--blue-deep); white-space: nowrap; }
.topnav a { font-size: 12.5px; color: var(--ink-2); font-weight: 500; white-space: nowrap; }
.topnav a:hover { color: var(--blue); }
.topnav .tn-sep { color: #c3d4ee; font-size: 11px; }

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, .8);
}
.header-inner {
  display: flex; align-items: center; gap: 14px;
  height: 66px;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand img { height: 42px; width: auto; }
.brand-name { font-size: 19px; font-weight: 800; letter-spacing: .5px; }
.brand-name b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-tag {
  font-size: 11px; color: var(--blue-deep);
  background: var(--blue-soft); border: 1px solid #bfdbfe;
  padding: 3px 9px; border-radius: 999px; font-weight: 600; white-space: nowrap;
}
.header-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.header-nav a {
  color: var(--ink-2); font-size: 14px; font-weight: 500;
  padding: 8px 13px; border-radius: 10px; transition: all .18s;
}
.header-nav a:hover { color: var(--blue); background: var(--blue-bg); }
.header-nav .nav-cta {
  color: #fff; background: var(--grad);
  box-shadow: 0 6px 16px rgba(37, 99, 235, .28);
}
.header-nav .nav-cta:hover { color: #fff; filter: brightness(1.06); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(700px 340px at 12% -10%, rgba(59, 130, 246, .16), transparent 60%),
    radial-gradient(640px 360px at 92% 0%, rgba(13, 148, 136, .14), transparent 60%),
    linear-gradient(180deg, #fbfdff 0%, var(--bg) 100%);
  padding: 64px 0 30px;
  overflow: hidden;
}
.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center; }
.hero h1 { font-size: 44px; line-height: 1.22; font-weight: 900; letter-spacing: .5px; }
.hero h1 .hl {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin-top: 14px; color: var(--ink-2); font-size: 16.5px; max-width: 520px; }
.hero-feats { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.hero-feats span {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600; color: var(--ink-2);
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 13px; box-shadow: 0 3px 10px rgba(15, 23, 42, .05);
}
.hero-feats span::before { content: "✓"; color: var(--teal); font-weight: 800; }

/* ---------- 上传卡片 ---------- */
.drop-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: 22px; padding: 20px; box-shadow: var(--shadow-lg);
}
.dropzone {
  border: 2px dashed #bfdbfe; border-radius: 16px;
  background: linear-gradient(180deg, #f7fbff, #f0f7ff);
  padding: 34px 20px; text-align: center; cursor: pointer;
  transition: all .2s;
}
.dropzone.drag { border-color: var(--blue); background: var(--blue-bg); transform: scale(1.01); }
.dropzone .dz-icon { font-size: 38px; }
.dropzone p { margin-top: 6px; font-size: 15.5px; font-weight: 600; }
.dropzone .dz-hint { color: var(--ink-3); font-size: 13px; font-weight: 400; margin-top: 2px; }
.dropzone .dz-actions { display: flex; gap: 10px; justify-content: center; margin-top: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  border: 0; cursor: pointer; font-size: 14.5px; font-weight: 600;
  border-radius: 12px; padding: 11px 20px; transition: all .18s;
  font-family: inherit;
}
.btn-primary { color: #fff; background: var(--grad); box-shadow: 0 8px 20px rgba(37, 99, 235, .3); }
.btn-primary:hover { filter: brightness(1.07); transform: translateY(-1px); }
.btn-ghost { color: var(--blue-deep); background: var(--blue-soft); }
.btn-ghost:hover { background: #bfdbfe; }

.drop-url { margin-top: 14px; display: flex; gap: 8px; }
.drop-url input {
  flex: 1; border: 1px solid var(--line); border-radius: 12px;
  padding: 11px 14px; font-size: 14px; outline: none; transition: border .18s;
  font-family: inherit; background: #fff;
}
.drop-url input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, .12); }
.drop-preview { display: none; margin-top: 14px; align-items: center; gap: 12px; }
.drop-preview.show { display: flex; }
.drop-preview img {
  width: 62px; height: 62px; object-fit: cover;
  border-radius: 12px; border: 1px solid var(--line);
}
.drop-preview .dp-info { flex: 1; min-width: 0; }
.drop-preview .dp-name { font-size: 13.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.drop-preview .dp-size { font-size: 12px; color: var(--ink-3); }
.drop-preview .dp-del { color: #dc2626; font-size: 12.5px; cursor: pointer; background: none; border: 0; font-weight: 600; }

/* ---------- 工具 chips ---------- */
.tool-chips { margin-top: 16px; }
.tool-chips .tc-title { font-size: 13px; color: var(--ink-2); font-weight: 600; margin-bottom: 8px; }
.tool-chips .tc-wrap { display: flex; flex-wrap: wrap; gap: 7px; }
.tc-chip {
  font-size: 13px; font-weight: 600; color: var(--ink-2);
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 13px; cursor: pointer; transition: all .16s; font-family: inherit;
}
.tc-chip:hover { border-color: var(--blue); color: var(--blue); }
.tc-chip.on { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 5px 14px rgba(37, 99, 235, .25); }

/* ---------- 工具网格 ---------- */
.section { padding: 52px 0 8px; }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 26px; }
.sec-head h2 { font-size: 28px; font-weight: 800; }
.sec-head h2 em { font-style: normal; color: var(--blue); }
.sec-head p { color: var(--ink-3); font-size: 14px; }

.tools-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(252px, 1fr));
  gap: 18px;
}
.tool-card {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 20px;
  transition: all .2s; position: relative; overflow: hidden;
}
.tool-card::after {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: var(--grad); opacity: 0; transition: opacity .2s;
}
.tool-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: #bfdbfe; }
.tool-card:hover::after { opacity: 1; }
.tool-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; background: linear-gradient(135deg, var(--blue-bg), var(--teal-soft));
  border: 1px solid #dbeafe;
}
.tool-card h3 { margin-top: 14px; font-size: 17.5px; font-weight: 700; }
.tool-card p { margin-top: 6px; font-size: 13.5px; color: var(--ink-2); }
.tool-card .go { margin-top: 14px; font-size: 13px; font-weight: 700; color: var(--blue); display: inline-flex; align-items: center; gap: 4px; }
.tool-card:hover .go { gap: 8px; }
.tool-card .go::after { content: "→"; transition: transform .2s; }
.tool-card:hover .go::after { transform: translateX(2px); }

/* ---------- 特性条 ---------- */
.feature-strip { margin: 52px 0 10px; }
.feature-strip-inner {
  background: #fff; border: 1px solid var(--line); border-radius: 22px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px;
  padding: 24px 10px; box-shadow: var(--shadow);
}
.feat { text-align: center; padding: 6px 14px; }
.feat .f-icon { font-size: 26px; }
.feat h4 { margin-top: 6px; font-size: 15px; font-weight: 700; }
.feat p { font-size: 12.5px; color: var(--ink-3); margin-top: 2px; }

/* ---------- 说明 / 关于 ---------- */
.about { margin: 34px 0 10px; }
.about-inner {
  background: linear-gradient(135deg, #f7fbff, #f0f7ff);
  border: 1px solid #dbeafe; border-radius: 22px; padding: 34px 36px;
}
.about h2 { font-size: 24px; font-weight: 800; }
.about p { margin-top: 10px; color: var(--ink-2); font-size: 15px; max-width: 900px; }
.about ol { margin: 12px 0 0 20px; color: var(--ink-2); font-size: 14.5px; }
.about li { margin-top: 6px; }

/* ---------- 页脚 ---------- */
.footer { margin-top: 58px; background: #0f172a; color: #94a3b8; }
.footer-inner { padding: 40px 22px 30px; }
.footer-top { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.footer-top img { height: 36px; }
.footer-top b { color: #fff; font-size: 17px; }
.footer-links { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer-links a { color: #94a3b8; font-size: 13.5px; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  margin-top: 22px; padding-top: 18px; border-top: 1px solid rgba(148, 163, 184, .18);
  font-size: 12.5px; color: #64748b; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap;
}

/* ============================================================
   工具页
   ============================================================ */
.toolbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255, 255, 255, .92); backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.toolbar-inner { display: flex; align-items: center; gap: 12px; height: 60px; }
.toolbar .back {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 14px; font-weight: 600; color: var(--ink-2);
  padding: 8px 12px; border-radius: 10px; transition: all .16s; white-space: nowrap;
}
.toolbar .back:hover { color: var(--blue); background: var(--blue-bg); }
.toolbar .tb-title { display: flex; align-items: center; gap: 10px; min-width: 0; }
.toolbar .tb-title img { height: 30px; width: auto; }
.toolbar .tb-name { font-size: 16px; font-weight: 700; white-space: nowrap; }
.toolbar .tb-name small { color: var(--ink-3); font-weight: 500; margin-left: 6px; font-size: 12.5px; }
.toolbar-actions { margin-left: auto; display: flex; gap: 8px; }
.toolbar-actions .btn { padding: 9px 15px; font-size: 13.5px; }

.tool-stage { display: flex; flex-direction: column; }
.tool-stage iframe {
  width: 100%; height: calc(100vh - 96px);
  border: 0; background: #fff; display: block;
}
.stage-note {
  position: fixed; left: 50%; top: 74px; transform: translateX(-50%);
  z-index: 60; background: #fff; border: 1px solid var(--line);
  box-shadow: var(--shadow-lg); border-radius: 14px;
  padding: 12px 18px; font-size: 13.5px; color: var(--ink-2);
  display: none; align-items: center; gap: 10px;
}
.stage-note.show { display: flex; }

/* ---------- 品牌加载遮罩 ---------- */
.load-overlay {
  position: fixed; inset: 96px 0 0 0; z-index: 30;
  background: #fff;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; text-align: center; padding: 24px;
}
.load-overlay.hide { display: none; }
.load-overlay .lo-logo { height: 58px; width: auto; }
.load-overlay .lo-spinner {
  width: 34px; height: 34px; border-radius: 50%;
  border: 3px solid var(--blue-soft); border-top-color: var(--blue);
  animation: lo-spin 1s linear infinite; margin-top: 6px;
}
@keyframes lo-spin { to { transform: rotate(360deg); } }
.load-overlay .lo-title { font-size: 16px; font-weight: 700; color: var(--ink); }
.load-overlay .lo-hint { font-size: 13px; color: var(--ink-3); max-width: 420px; line-height: 1.7; }
.load-overlay .btn { margin-top: 4px; }

/* 处理完成浮条 */
.result-bar {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(120%);
  z-index: 70; background: #0f172a; color: #fff;
  border-radius: 16px; padding: 14px 20px;
  display: flex; align-items: center; gap: 16px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .35);
  transition: transform .3s cubic-bezier(.2, .9, .3, 1.2);
  font-size: 14px; max-width: calc(100vw - 40px); flex-wrap: wrap; justify-content: center;
}
.result-bar.show { transform: translateX(-50%) translateY(0); }
.result-bar .rb-info { color: #cbd5e1; font-size: 13px; }
.result-bar .btn { padding: 9px 16px; font-size: 13.5px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding: 40px 0 20px; }
  .hero h1 { font-size: 32px; }
  .feature-strip-inner { grid-template-columns: repeat(2, 1fr); row-gap: 22px; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
}
@media (max-width: 600px) {
  .header-nav { display: none; }
  .brand-tag { display: none; }
  .about-inner { padding: 26px 20px; }
  .footer-bottom { flex-direction: column; }
}