:root {
    --bg-color: #060713;
    --card-bg: #101226;
    --text-color: #f1f5f9;
    --text-muted: #475569;
    --accent-color: #38bdf8;
    --border-color: #1f2444;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background-color: var(--bg-color); color: var(--text-color); line-height: 1.6; -webkit-font-smoothing: antialiased; }
.container { width: 100%; max-width: 1000px; margin: 0 auto; padding: 0 24px; }

header { background-color: rgba(16, 18, 38, 0.9); backdrop-filter: blur(15px); border-bottom: 1px solid var(--border-color); padding: 18px 0; position: sticky; top: 0; z-index: 100; }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.4rem; font-weight: 900; color: #fff; text-decoration: none; background: linear-gradient(135deg, #38bdf8, #ec4899); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
nav a { color: #64748b; text-decoration: none; margin-left: 24px; font-weight: 600; font-size: 0.95rem; }
nav a:hover, nav a.active { color: var(--accent-color); }

main { padding: 50px 0; }
.generator-section { text-align: center; margin-bottom: 60px; }
.generator-section h1 { font-size: 3rem; color: #fff; margin-bottom: 15px; font-weight: 900; letter-spacing: -0.03em; }
.subtitle { color: #64748b; font-size: 1.15rem; margin-bottom: 40px; max-width: 700px; margin-left: auto; margin-right: auto; }

/* 巨型实时输入面板 */
.input-wrapper { background-color: var(--card-bg); border: 2px solid var(--border-color); border-radius: 24px; padding: 15px; margin-bottom: 40px; box-shadow: 0 10px 30px rgba(0,0,0,0.4); transition: border-color 0.2s; }
.input-wrapper:focus-within { border-color: var(--accent-color); }
#user-input { width: 100%; height: 120px; background-color: transparent; border: none; outline: none; color: #fff; font-size: 1.3rem; font-weight: 500; resize: none; font-family: inherit; }
#user-input::placeholder { color: #334155; }

/* 提示弹窗 */
.toast-message {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(-30px);
    background: linear-gradient(135deg, #10b981, #38bdf8);
    color: #fff;
    padding: 14px 40px;
    border-radius: 50px;
    font-weight: 800;
    box-shadow: 0 20px 40px rgba(16, 185, 129, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}
.toast-message.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* 结果流线型布局列表 */
.results-container { display: flex; flex-direction: column; gap: 16px; }
.placeholder-tip { color: #334155; font-size: 1.2rem; font-style: italic; padding: 40px 0; }

/* 字体精美输出行 */
.font-card { background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 20px; display: flex; align-items: center; justify-content: space-between; text-align: left; transition: transform 0.15s, border-color 0.15s; }
.font-card:hover { border-color: #334155; transform: translateX(4px); }
.font-name { width: 20%; font-size: 0.85rem; color: #64748b; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; }
.font-output { width: 65%; font-size: 1.5rem; color: #fff; overflow-x: auto; white-space: nowrap; padding-right: 15px; }
.font-output::-webkit-scrollbar { height: 0px; } /* 隐藏滚动条让视觉极其干净 */

/* 独立快捷复制按钮 */
.copy-action-btn { width: 12%; background-color: var(--bg-color); border: 1px solid var(--border-color); color: var(--accent-color); font-weight: 700; padding: 12px 0; border-radius: 12px; cursor: pointer; transition: all 0.2s; text-align: center; font-size: 0.95rem; }
.copy-action-btn:hover { background-color: var(--accent-color); border-color: var(--accent-color); color: #060713; }

/* SEO 文章板块 */
.seo-section { background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: 24px; padding: 50px; text-align: left; margin-top: 80px; border-top: 6px solid #ec4899; }
.seo-section h2 { font-size: 1.9rem; color: #fff; margin-bottom: 25px; font-weight: 900; }
.article-body h3 { font-size: 1.35rem; color: #f8fafc; margin: 35px 0 14px 0; font-weight: 800; }
.article-body p { color: #94a3b8; margin-bottom: 20px; font-size: 1.05rem; line-height: 1.8; }
.article-body code { background-color: var(--bg-color); color: #f43f5e; padding: 3px 8px; border-radius: 6px; font-family: monospace; }

footer { text-align: center; padding: 50px 0; color: #1e293b; font-size: 0.95rem; border-top: 1px solid var(--border-color); margin-top: 100px; }

/* 全球移动端极致无错适配 */
@media(max-width: 768px) {
    .font-card { flex-direction: column; align-items: flex-start; gap: 12px; padding: 16px; }
    .font-name { width: 100%; }
    .font-output { width: 100%; font-size: 1.3rem; padding-bottom: 5px; }
    .copy-action-btn { width: 100%; padding: 14px 0; }
    .generator-section h1 { font-size: 2.1rem; }
    .seo-section { padding: 30px 20px; }
}