/* ============================================================
   ICOtool — 浅橙玻璃风（Light Glass / Orange）
   ============================================================ */
:root{
  --orange-50:#fff7ed;
  --orange-100:#ffedd5;
  --orange-200:#fed7aa;
  --orange-300:#fdba74;
  --orange-400:#fb923c;
  --orange-500:#f97316;
  --orange-600:#ea580c;
  --amber-400:#fbbf24;
  --ink-900:#1f2937;
  --ink-700:#374151;
  --ink-500:#6b7280;
  --ink-400:#9ca3af;
  --glass-bg:rgba(255,255,255,.62);
  --glass-bg-strong:rgba(255,255,255,.78);
  --glass-border:rgba(255,255,255,.75);
  --glass-shadow:0 8px 32px rgba(249,115,22,.10), 0 2px 8px rgba(31,41,55,.05);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --font:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink-900);
  background:
    radial-gradient(900px 500px at 8% -5%, rgba(253,186,116,.38), transparent 60%),
    radial-gradient(800px 520px at 95% 8%, rgba(251,191,36,.28), transparent 60%),
    radial-gradient(700px 600px at 50% 110%, rgba(249,115,22,.14), transparent 60%),
    linear-gradient(180deg,#fffaf3 0%,#fff4e8 50%,#fff8f0 100%);
  min-height:100vh;
  line-height:1.6;
}
/* 背景漂浮光斑 */
.bg-orbs{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none}
.bg-orbs i{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;animation:float 16s ease-in-out infinite}
.bg-orbs i:nth-child(1){width:340px;height:340px;background:#fed7aa;top:-80px;left:-60px}
.bg-orbs i:nth-child(2){width:260px;height:260px;background:#fde68a;top:18%;right:-70px;animation-delay:-5s}
.bg-orbs i:nth-child(3){width:300px;height:300px;background:#ffedd5;bottom:-90px;left:38%;animation-delay:-10s}
@keyframes float{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-26px) scale(1.05)}}

.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------------- header ---------------- */
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(18px) saturate(1.4);
  -webkit-backdrop-filter:blur(18px) saturate(1.4);
  background:rgba(255,250,243,.72);
  border-bottom:1px solid rgba(249,115,22,.10);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink-900)}
.brand-logo{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--orange-400),var(--orange-600));
  box-shadow:0 4px 12px rgba(249,115,22,.35);
}
.brand-logo svg{width:22px;height:22px}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.5px}
.brand-name em{font-style:normal;color:var(--orange-500)}
.brand-slogan{font-size:12px;color:var(--ink-500);margin-top:-3px}
.nav{display:flex;gap:6px}
.nav a{
  text-decoration:none;color:var(--ink-700);font-size:14.5px;font-weight:500;
  padding:8px 15px;border-radius:999px;transition:.2s;
}
.nav a:hover{background:rgba(249,115,22,.10);color:var(--orange-600)}

/* ---------------- hero ---------------- */
.hero{text-align:center;padding:52px 0 12px}
.hero-badge{
  display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--orange-600);
  background:rgba(255,255,255,.6);border:1px solid rgba(249,115,22,.22);
  padding:5px 16px;border-radius:999px;margin-bottom:18px;font-weight:600;
  backdrop-filter:blur(8px);
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--orange-500);animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:clamp(30px,4.5vw,46px);font-weight:800;letter-spacing:1px;line-height:1.25}
.hero h1 .grad{
  background:linear-gradient(120deg,var(--orange-500),#f59e0b 60%,var(--orange-400));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{margin-top:14px;font-size:16.5px;color:var(--ink-500);max-width:640px;margin-left:auto;margin-right:auto}
.hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:22px}
.hero-tags span{
  font-size:13px;color:var(--ink-700);background:var(--glass-bg);
  border:1px solid var(--glass-border);padding:6px 14px;border-radius:999px;
  box-shadow:0 2px 8px rgba(249,115,22,.06);backdrop-filter:blur(8px);
}
.hero-tags span b{color:var(--orange-500)}

/* ---------------- glass card 通用 ---------------- */
.glass{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  box-shadow:var(--glass-shadow);
  backdrop-filter:blur(20px) saturate(1.3);
  -webkit-backdrop-filter:blur(20px) saturate(1.3);
}

/* ---------------- tabs ---------------- */
.tool-wrap{margin-top:34px}
.tabs{display:flex;justify-content:center;gap:10px;margin-bottom:22px}
.tab-btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font);font-size:15px;font-weight:600;color:var(--ink-700);
  background:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.8);
  padding:11px 26px;border-radius:999px;cursor:pointer;transition:.22s;
  backdrop-filter:blur(10px);box-shadow:0 2px 10px rgba(249,115,22,.07);
}
.tab-btn svg{width:17px;height:17px}
.tab-btn:hover{transform:translateY(-1px);border-color:var(--orange-300)}
.tab-btn.active{
  background:linear-gradient(135deg,var(--orange-400),var(--orange-500));
  color:#fff;border-color:transparent;
  box-shadow:0 6px 18px rgba(249,115,22,.35);
}
.tab-panel{display:none}
.tab-panel.active{display:block;animation:fadeUp .35s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------------- 工具主体布局 ---------------- */
.tool-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:22px;align-items:start}
@media(max-width:920px){.tool-grid{grid-template-columns:1fr}}
.panel{padding:26px}
.panel-title{display:flex;align-items:center;gap:9px;font-size:16.5px;font-weight:700;margin-bottom:16px}
.panel-title .step{
  width:24px;height:24px;border-radius:8px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--orange-400),var(--orange-500));
  color:#fff;font-size:13px;font-weight:700;flex:none;
}

/* 上传区 */
.dropzone{
  border:2px dashed rgba(249,115,22,.35);
  border-radius:var(--radius-md);
  background:rgba(255,247,237,.55);
  padding:40px 20px;text-align:center;cursor:pointer;transition:.25s;position:relative;
}
.dropzone:hover,.dropzone.dragover{
  border-color:var(--orange-500);
  background:rgba(255,237,213,.7);
  box-shadow:inset 0 0 0 3px rgba(249,115,22,.06);
}
.dz-icon{
  width:64px;height:64px;margin:0 auto 14px;border-radius:18px;display:grid;place-items:center;
  background:linear-gradient(135deg,#ffedd5,#fed7aa);
  box-shadow:0 6px 16px rgba(249,115,22,.18);
}
.dz-icon svg{width:32px;height:32px}
.dropzone h3{font-size:16.5px;font-weight:700;color:var(--ink-900)}
.dropzone p{font-size:13px;color:var(--ink-500);margin-top:6px}
.dropzone p b{color:var(--orange-500)}
.dz-formats{display:flex;justify-content:center;gap:7px;margin-top:14px;flex-wrap:wrap}
.dz-formats i{
  font-style:normal;font-size:11.5px;font-weight:700;color:var(--orange-600);
  background:rgba(255,255,255,.8);border:1px solid var(--orange-200);
  padding:2px 9px;border-radius:6px;
}
.dropzone input[type=file]{display:none}

/* 已上传源图信息 */
.src-info{display:none;align-items:center;gap:14px;margin-top:16px;padding:12px 14px;
  background:rgba(255,255,255,.7);border:1px solid var(--orange-100);border-radius:var(--radius-sm)}
.src-info.show{display:flex}
.src-thumb{
  width:56px;height:56px;border-radius:10px;flex:none;object-fit:contain;
  background:
    conic-gradient(#eee 0 25%,#fff 0 50%,#eee 0 75%,#fff 0) 0 0/14px 14px;
  border:1px solid var(--orange-100);
}
.src-meta{flex:1;min-width:0}
.src-meta b{font-size:14px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.src-meta span{font-size:12.5px;color:var(--ink-500)}
.src-remove{
  border:none;background:rgba(249,115,22,.1);color:var(--orange-600);width:30px;height:30px;
  border-radius:8px;cursor:pointer;font-size:15px;transition:.2s;flex:none;
}
.src-remove:hover{background:rgba(249,115,22,.2)}

/* ---------- 文字转ICO ---------- */
.text-form{display:grid;gap:14px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-700);margin-bottom:7px}
.field input[type=text],.field select{
  width:100%;font-family:var(--font);font-size:14.5px;color:var(--ink-900);
  background:rgba(255,255,255,.8);border:1px solid var(--orange-100);
  border-radius:var(--radius-sm);padding:10px 14px;outline:none;transition:.2s;
}
.field input[type=text]:focus,.field select:focus{border-color:var(--orange-400);box-shadow:0 0 0 3px rgba(249,115,22,.12)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:560px){.field-row{grid-template-columns:1fr}}
.color-line{display:flex;align-items:center;gap:10px}
.color-line input[type=color]{
  width:42px;height:34px;border:none;border-radius:8px;cursor:pointer;background:none;padding:0;
}
.color-line input[type=color]::-webkit-color-swatch-wrapper{padding:2px}
.color-line input[type=color]::-webkit-color-swatch{border-radius:7px;border:1px solid rgba(0,0,0,.08)}
.color-line span{font-size:12.5px;color:var(--ink-500)}
.swatches{display:flex;gap:8px;flex-wrap:wrap}
.swatch{
  width:26px;height:26px;border-radius:8px;cursor:pointer;border:2px solid transparent;transition:.15s;
  box-shadow:0 1px 4px rgba(0,0,0,.12);
}
.swatch:hover{transform:scale(1.12)}
.swatch.sel{border-color:var(--ink-900)}
.swatch.transparent{
  background:conic-gradient(#ddd 0 25%,#fff 0 50%,#ddd 0 75%,#fff 0) 0 0/10px 10px !important;
}

/* ---------- 设置面板（右列） ---------- */
.opt-block{margin-bottom:20px}
.opt-block:last-child{margin-bottom:0}
.opt-label{display:flex;justify-content:space-between;align-items:center;font-size:13.5px;font-weight:700;color:var(--ink-700);margin-bottom:10px}
.opt-label .mini{font-size:12px;font-weight:500;color:var(--orange-500);cursor:pointer;user-select:none}
.opt-label .mini:hover{text-decoration:underline}

.size-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}
@media(max-width:560px){.size-grid{grid-template-columns:repeat(3,1fr)}}
.size-item{position:relative}
.size-item input{position:absolute;opacity:0;pointer-events:none}
.size-item label{
  display:block;text-align:center;font-size:13px;font-weight:600;color:var(--ink-700);
  background:rgba(255,255,255,.72);border:1.5px solid var(--orange-100);
  border-radius:var(--radius-sm);padding:9px 4px;cursor:pointer;transition:.18s;user-select:none;
}
.size-item label small{display:block;font-size:10.5px;font-weight:500;color:var(--ink-400);margin-top:1px}
.size-item label:hover{border-color:var(--orange-300)}
.size-item input:checked+label{
  background:linear-gradient(135deg,rgba(251,146,60,.16),rgba(249,115,22,.12));
  border-color:var(--orange-400);color:var(--orange-600);
  box-shadow:0 2px 8px rgba(249,115,22,.15);
}
.size-item input:checked+label small{color:var(--orange-400)}

.seg{display:flex;background:rgba(255,255,255,.6);border:1px solid var(--orange-100);border-radius:var(--radius-sm);padding:4px;gap:4px}
.seg button{
  flex:1;font-family:var(--font);font-size:13px;font-weight:600;color:var(--ink-500);
  background:transparent;border:none;border-radius:8px;padding:8px 4px;cursor:pointer;transition:.18s;
}
.seg button.active{background:linear-gradient(135deg,var(--orange-400),var(--orange-500));color:#fff;box-shadow:0 3px 8px rgba(249,115,22,.3)}
.seg button:not(.active):hover{color:var(--orange-600)}

.range-line{display:flex;align-items:center;gap:12px}
.range-line input[type=range]{flex:1;accent-color:var(--orange-500);height:4px}
.range-line output{font-size:12.5px;font-weight:700;color:var(--orange-600);min-width:40px;text-align:right}

/* 生成按钮 */
.btn{
  font-family:var(--font);display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:16px;font-weight:700;border:none;border-radius:var(--radius-md);
  padding:15px 24px;cursor:pointer;transition:.22s;width:100%;
}
.btn svg{width:19px;height:19px}
.btn-primary{
  background:linear-gradient(135deg,var(--orange-400),var(--orange-500) 60%,var(--orange-600));
  color:#fff;box-shadow:0 8px 22px rgba(249,115,22,.38);
  background-size:150% 150%;
}
.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 12px 28px rgba(249,115,22,.45);background-position:100% 50%}
.btn-primary:active:not(:disabled){transform:translateY(0)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-ghost{
  background:rgba(255,255,255,.75);color:var(--orange-600);
  border:1.5px solid var(--orange-200);box-shadow:0 2px 8px rgba(249,115,22,.08);
}
.btn-ghost:hover{border-color:var(--orange-400);background:#fff}

/* ---------------- 预览区 ---------------- */
.preview-section{margin-top:22px;padding:26px;display:none}
.preview-section.show{display:block;animation:fadeUp .4s ease}
.preview-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:18px}
.preview-head h2{font-size:18px;font-weight:800}
.preview-head h2 svg{width:20px;height:20px;vertical-align:-4px;margin-right:6px}
.dl-group{display:flex;gap:10px;flex-wrap:wrap}
.dl-group .btn{width:auto;padding:11px 22px;font-size:14.5px}

.preview-grid{display:flex;flex-wrap:wrap;gap:16px}
.pv-item{
  background:rgba(255,255,255,.72);border:1px solid var(--orange-100);
  border-radius:var(--radius-md);padding:14px;text-align:center;min-width:104px;
  transition:.2s;
}
.pv-item:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(249,115,22,.15);border-color:var(--orange-300)}
.pv-canvas-box{
  display:grid;place-items:center;height:96px;margin-bottom:8px;border-radius:8px;
  background:conic-gradient(#f0f0f0 0 25%,#fff 0 50%,#f0f0f0 0 75%,#fff 0) 0 0/16px 16px;
}
.pv-canvas-box canvas{image-rendering:pixelated;max-width:96px;max-height:96px}
.pv-item b{font-size:13px;display:block;color:var(--ink-700)}
.pv-item a{font-size:12px;color:var(--orange-500);text-decoration:none;font-weight:600}
.pv-item a:hover{text-decoration:underline}

/* favicon 模拟器 */
.fav-sim{margin-top:20px}
.fav-sim h3{font-size:14px;font-weight:700;color:var(--ink-700);margin-bottom:10px}
.browser-mock{
  border-radius:12px;overflow:hidden;border:1px solid var(--orange-100);
  box-shadow:0 4px 14px rgba(31,41,55,.08);background:#fff;max-width:560px;
}
.bm-bar{display:flex;align-items:flex-end;gap:8px;background:#f3f4f6;padding:8px 12px 0}
.bm-dots{display:flex;gap:6px;padding-bottom:12px}
.bm-dots i{width:11px;height:11px;border-radius:50%}
.bm-dots i:nth-child(1){background:#fc605c}.bm-dots i:nth-child(2){background:#fdbc40}.bm-dots i:nth-child(3){background:#34c749}
.bm-tab{
  display:flex;align-items:center;gap:8px;background:#fff;border-radius:10px 10px 0 0;
  padding:8px 16px;font-size:13px;color:var(--ink-700);min-width:200px;max-width:280px;
}
.bm-tab img{width:16px;height:16px;flex:none}
.bm-tab span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bm-url{background:#fff;padding:9px 12px;border-top:1px solid #f0f0f0}
.bm-url .url-pill{
  display:flex;align-items:center;gap:8px;background:#f3f4f6;border-radius:999px;
  font-size:12.5px;color:var(--ink-500);padding:6px 14px;
}
.bm-url .url-pill svg{width:13px;height:13px;flex:none}

/* toast */
#toast{
  position:fixed;left:50%;bottom:40px;transform:translateX(-50%) translateY(20px);
  background:rgba(31,41,55,.92);color:#fff;font-size:14px;padding:11px 22px;border-radius:999px;
  opacity:0;pointer-events:none;transition:.3s;z-index:99;backdrop-filter:blur(6px);
}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------------- 特性 / 步骤 / FAQ ---------------- */
.section{padding:64px 0 0}
.section-head{text-align:center;margin-bottom:34px}
.section-head h2{font-size:28px;font-weight:800}
.section-head h2 .grad{background:linear-gradient(120deg,var(--orange-500),#f59e0b);-webkit-background-clip:text;background-clip:text;color:transparent}
.section-head p{color:var(--ink-500);margin-top:8px;font-size:15px}

.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:960px){.feature-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.feature-grid{grid-template-columns:1fr}}
.feature-card{padding:26px 22px;transition:.25s}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(249,115,22,.16)}
.fc-icon{
  width:48px;height:48px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
  background:linear-gradient(135deg,#ffedd5,#fed7aa);
}
.fc-icon svg{width:24px;height:24px}
.feature-card h3{font-size:16px;font-weight:700;margin-bottom:7px}
.feature-card p{font-size:13.5px;color:var(--ink-500);line-height:1.65}

.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
@media(max-width:960px){.steps-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.steps-grid{grid-template-columns:1fr}}
.step-card{padding:26px 22px;position:relative}
.step-card .num{
  font-size:38px;font-weight:800;line-height:1;margin-bottom:12px;
  background:linear-gradient(135deg,var(--orange-300),var(--orange-500));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.step-card h3{font-size:15.5px;font-weight:700;margin-bottom:6px}
.step-card p{font-size:13.5px;color:var(--ink-500)}

.faq-list{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq-item{overflow:hidden}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;
  padding:17px 22px;font-size:15px;font-weight:700;color:var(--ink-900);user-select:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .arrow{transition:.25s;color:var(--orange-500);flex:none;margin-left:12px}
.faq-item[open] summary .arrow{transform:rotate(180deg)}
.faq-item .faq-body{padding:0 22px 18px;font-size:14px;color:var(--ink-500);line-height:1.75}

/* ---------------- footer ---------------- */
.site-footer{
  margin-top:70px;padding:30px 0;text-align:center;
  border-top:1px solid rgba(249,115,22,.10);
  background:rgba(255,250,243,.6);backdrop-filter:blur(10px);
}
.site-footer p{font-size:13px;color:var(--ink-400)}
.site-footer a{color:var(--orange-500);text-decoration:none}
.site-footer a:hover{text-decoration:underline}

@media(max-width:720px){
  .nav{display:none}
  .hero{padding-top:36px}
  .panel{padding:20px}
}