/* ============ 一键反馈样式（qf- 前缀避免污染） ============ */
#qfRoot { --qf-primary: #0ea5e9; --qf-primary-dark: #0284c7; }

/* ---------- 浮动触发按钮 ---------- */
.qf-trigger {
    position: fixed;
    right: 1.25rem;
    bottom: 1.5rem;
    z-index: 60;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.1rem;
    border: none;
    border-radius: 9999px;
    background: linear-gradient(135deg, #f97316, #ea580c);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 8px 24px -6px rgba(249, 115, 22, 0.55), 0 4px 10px -3px rgba(0,0,0,0.12);
    transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.25s ease, opacity 0.3s ease;
    opacity: 0;
    transform: translateY(20px) scale(0.9);
    pointer-events: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
.qf-trigger.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.qf-trigger:hover {
    transform: translateY(-2px) scale(1.04);
    box-shadow: 0 12px 28px -6px rgba(249, 115, 22, 0.65), 0 6px 12px -3px rgba(0,0,0,0.15);
}
.qf-trigger:active { transform: translateY(0) scale(0.98); }
.qf-trigger.is-submitted { background: linear-gradient(135deg, #10b981, #059669); box-shadow: 0 8px 24px -6px rgba(16,185,129,0.5); }
.qf-trigger-emoji { font-size: 1.1rem; line-height: 1; }
.qf-trigger-text { line-height: 1; }
/* 呼吸光晕 */
.qf-trigger-pulse {
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    background: rgba(249, 115, 22, 0.6);
    z-index: -1;
    animation: qfPulse 2.2s ease-out infinite;
    opacity: 0;
}
.qf-trigger.is-visible:not(.is-submitted) .qf-trigger-pulse { opacity: 1; }
.qf-trigger.is-submitted .qf-trigger-pulse { display: none; }
@keyframes qfPulse {
    0% { transform: scale(1); opacity: 0.55; }
    70% { transform: scale(1.35); opacity: 0; }
    100% { transform: scale(1.35); opacity: 0; }
}
@media (max-width: 640px) {
    .qf-trigger { right: 0.875rem; bottom: 1rem; padding: 0.65rem 0.9rem; font-size: 0.8rem; }
    .qf-trigger-emoji { font-size: 1rem; }
}

/* ---------- 遮罩（默认隐藏，避免页面渲染期间闪现） ---------- */
.qf-overlay, .qf-success-overlay {
    position: fixed; inset: 0; z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    padding: 1rem;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0; pointer-events: none;
    transition: opacity 0.25s ease;
}
.qf-overlay.is-open, .qf-success-overlay.is-open {
    opacity: 1; pointer-events: auto;
}

/* ---------- 反馈弹窗 ---------- */
.qf-modal {
    position: relative;
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 1.25rem;
    padding: 1.75rem 1.5rem 1.25rem;
    box-shadow: 0 25px 60px -12px rgba(0,0,0,0.25);
    transform: scale(0.85) translateY(20px);
    opacity: 0;
    transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1), opacity 0.25s ease;
    max-height: 90vh;
    overflow-y: auto;
}
.qf-overlay.is-open .qf-modal { transform: scale(1) translateY(0); opacity: 1; }

.qf-close {
    position: absolute; top: 0.75rem; right: 0.75rem;
    width: 2rem; height: 2rem;
    border: none; border-radius: 9999px;
    background: #f1f5f9; color: #64748b;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.qf-close:hover { background: #e2e8f0; color: #1e293b; transform: rotate(90deg); }

.qf-header { text-align: center; margin-bottom: 1.25rem; }
.qf-emoji { font-size: 2rem; line-height: 1; margin-bottom: 0.5rem; }
.qf-title { font-size: 1.25rem; font-weight: 700; color: #0f172a; margin: 0 0 0.25rem; }
.qf-subtitle { font-size: 0.875rem; color: #64748b; margin: 0; }

.qf-section { margin-bottom: 1rem; }
.qf-section-label {
    font-size: 0.8125rem; font-weight: 600; color: #334155;
    margin: 0 0 0.5rem;
}
.qf-optional { color: #94a3b8; font-weight: 400; font-size: 0.75rem; }

/* 标签按钮 */
.qf-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.qf-tag {
    padding: 0.5rem 0.875rem;
    border: 1.5px solid #e2e8f0;
    background: #f8fafc;
    color: #475569;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.18s ease;
    user-select: none;
}
.qf-tag:hover { border-color: #bae6fd; background: #f0f9ff; color: #0369a1; }
.qf-tag.is-active {
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 12px -3px rgba(14, 165, 233, 0.4);
}

/* 输入框 */
.qf-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1.5px solid #e2e8f0;
    border-radius: 0.75rem;
    font-size: 0.875rem;
    color: #1e293b;
    background: #f8fafc;
    resize: none;
    transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
    font-family: inherit;
    box-sizing: border-box;
}
.qf-textarea:focus {
    outline: none;
    border-color: var(--qf-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}
.qf-textarea::placeholder { color: #94a3b8; }
.qf-counter { text-align: right; font-size: 0.75rem; color: #94a3b8; margin-top: 0.25rem; }

.qf-foot-tip {
    text-align: center;
    font-size: 0.75rem;
    color: #94a3b8;
    margin: 0.5rem 0 1rem;
}

/* 提交按钮 */
.qf-submit {
    width: 100%;
    padding: 0.85rem;
    border: none;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    box-shadow: 0 6px 16px -4px rgba(16, 185, 129, 0.45);
    transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.2s ease;
}
.qf-submit:hover { transform: translateY(-1px); box-shadow: 0 8px 22px -4px rgba(16, 185, 129, 0.55); }
.qf-submit:active { transform: translateY(0); }
.qf-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.qf-link {
    display: block;
    text-align: center;
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: #64748b;
    text-decoration: none;
    transition: color 0.2s ease;
}
.qf-link:hover { color: var(--qf-primary); }

/* ---------- 成功弹窗 ---------- */
.qf-success-modal {
    position: relative;
    width: 100%;
    max-width: 360px;
    background: #fff;
    border-radius: 1.5rem;
    padding: 2.5rem 2rem 2rem;
    text-align: center;
    box-shadow: 0 25px 60px -12px rgba(0,0,0,0.25);
    overflow: hidden;
    transform: scale(0.7) translateY(20px);
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1), opacity 0.3s ease;
}
.qf-success-overlay.is-open .qf-success-modal { transform: scale(1) translateY(0); opacity: 1; }
.qf-success-emoji {
    font-size: 3rem; line-height: 1;
    animation: qfHeartBeat 1.5s ease-in-out infinite;
}
@keyframes qfHeartBeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}
.qf-success-title {
    font-size: 1.5rem; font-weight: 700; color: #0f172a;
    margin: 0.75rem 0 0.25rem;
}
.qf-success-sub { font-size: 0.9rem; color: #64748b; margin: 0 0 1.25rem; }
.qf-success-btn {
    padding: 0.65rem 2rem;
    border: none;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
    font-size: 0.9rem; font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 14px -3px rgba(16,185,129,0.4);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.qf-success-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px -3px rgba(16,185,129,0.5); }

/* 彩带粒子 */
.qf-confetti {
    position: absolute; inset: 0; pointer-events: none; overflow: hidden;
}
.qf-confetti-piece {
    position: absolute;
    width: 8px; height: 8px;
    border-radius: 2px;
    opacity: 0;
}
.qf-confetti-piece.go {
    animation: qfConfettiFall 1.8s ease-out forwards;
}
@keyframes qfConfettiFall {
    0% { opacity: 1; transform: translateY(-20px) rotate(0deg) scale(1); }
    100% { opacity: 0; transform: translateY(280px) rotate(720deg) scale(0.3); }
}

/* ---------- 浮动收藏按钮（在 qfTrigger 上方）---------- */
.qf-fav-btn {
    position: fixed;
    right: 1.25rem;
    bottom: 4.5rem;
    z-index: 60;
    width: 2.75rem;
    height: 2.75rem;
    border: 1.5px solid #e2e8f0;
    border-radius: 9999px;
    background: #fff;
    color: #64748b;
    font-size: 1.1rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px -6px rgba(0,0,0,0.12), 0 4px 10px -3px rgba(0,0,0,0.08);
    transition: transform 0.25s cubic-bezier(0.34,1.56,0.64,1), box-shadow 0.25s ease, opacity 0.3s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    opacity: 0;
    transform: translateY(20px) scale(0.9);
    pointer-events: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
.qf-fav-btn.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}
.qf-fav-btn:hover {
    transform: translateY(-2px) scale(1.06);
    box-shadow: 0 12px 28px -6px rgba(244, 63, 94, 0.25), 0 6px 12px -3px rgba(0,0,0,0.1);
    border-color: #fecaca;
    color: #ef4444;
    background: #fef2f2;
}
.qf-fav-btn:active { transform: translateY(0) scale(0.98); }
.qf-fav-btn.is-favorited {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    border-color: #fca5a5;
    color: #ef4444;
}
.qf-fav-btn.is-favorited:hover {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    border-color: #f87171;
    color: #dc2626;
}
@media (max-width: 640px) {
    .qf-fav-btn { right: 0.875rem; bottom: 3.75rem; width: 2.5rem; height: 2.5rem; font-size: 1rem; }
}