/* ===== 自然拼读练声台 ===== */
#phApp .ph-hero { text-align: center; padding: 12px 10px 0; }
#phApp .ph-hero h1 { font-size: 30px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#phApp .ph-hero p { font-size: 15px; color: var(--c-text-sub); line-height: 1.7; }

#phApp .ph-bar { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 18px 0; }
#phApp .ph-tab {
    border: 2px solid var(--c-primary); background: transparent; color: var(--c-primary);
    border-radius: 999px; padding: 8px 16px; font-size: 14px; font-weight: 700;
    cursor: pointer; transition: background .15s, color .15s;
}
#phApp .ph-tab.is-on { background: var(--c-primary); color: #fff; }

#phApp .ph-panel {
    max-width: 760px; margin: 0 auto; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: var(--radius-md);
    padding: 20px 18px; box-shadow: var(--shadow-md);
}

#phApp .ph-mode { display: flex; gap: 10px; justify-content: center; margin-bottom: 16px; }
#phApp .ph-mode button {
    border: 1px solid var(--c-border); background: var(--c-surface-soft); color: var(--c-text);
    border-radius: 999px; padding: 8px 18px; font-size: 14px; font-weight: 700; cursor: pointer;
}
#phApp .ph-mode button.is-on { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

#phApp .ph-now {
    text-align: center; background: var(--c-primary-soft); border: 1px solid var(--c-border);
    border-radius: var(--radius-sm); padding: 14px 10px; margin-bottom: 14px;
}
#phApp .ph-big { font-size: 44px; font-weight: 800; color: var(--c-primary); line-height: 1.2; letter-spacing: 2px; }
#phApp .ph-ipa { font-size: 16px; color: var(--c-text-sub); margin-top: 4px; }
#phApp .ph-word { font-size: 20px; font-weight: 700; color: var(--c-text); margin-top: 6px; }
#phApp .ph-zh { font-size: 14px; color: var(--c-text-sub); margin-top: 2px; }

#phApp .ph-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(96px, 1fr)); gap: 10px; }
#phApp .ph-card {
    border: 2px solid var(--c-border); border-radius: 14px; background: var(--c-surface-soft);
    padding: 10px 6px; cursor: pointer; text-align: center; transition: .15s;
}
#phApp .ph-card:hover { border-color: var(--c-primary); }
#phApp .ph-card.is-on { border-color: var(--c-primary); background: var(--c-primary-soft); }
#phApp .ph-card .ph-c1 { font-size: 22px; font-weight: 800; color: var(--c-text); line-height: 1.2; }
#phApp .ph-card .ph-c2 { font-size: 12px; color: var(--c-text-sub); margin-top: 3px; }

#phApp .ph-q { text-align: center; font-size: 17px; font-weight: 800; color: var(--c-text); margin-bottom: 12px; }
#phApp .ph-mask { text-align: center; font-size: 40px; font-weight: 800; letter-spacing: 4px; color: var(--c-text); margin-bottom: 12px; }
#phApp .ph-opts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
#phApp .ph-opt {
    border: 2px solid var(--c-border); border-radius: 14px; background: var(--c-surface-soft);
    padding: 16px 8px; cursor: pointer; font-size: 24px; font-weight: 800; color: var(--c-text); transition: .15s;
}
#phApp .ph-opt:hover { border-color: var(--c-primary); }
#phApp .ph-opt.ok { border-color: var(--c-accent-green); background: var(--c-primary-soft); }
#phApp .ph-opt.bad { border-color: #e03131; background: #fff0f0; }

#phApp .ph-msg { text-align: center; font-size: 17px; font-weight: 800; min-height: 26px; margin-top: 14px; color: var(--c-text); }
#phApp .ph-msg.ok { color: var(--c-primary); }
#phApp .ph-msg.bad { color: #e03131; }

#phApp .ph-ctrl { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 16px; }
#phApp .ph-btn {
    border: none; border-radius: 999px; padding: 12px 20px; font-size: 15px; font-weight: 700; color: #fff;
    cursor: pointer; background: linear-gradient(135deg, var(--c-primary), var(--c-accent-cyan)); box-shadow: var(--shadow-md);
}
#phApp .ph-btn.gray { background: var(--c-surface-2); color: var(--c-text); box-shadow: none; border: 1px solid var(--c-border); }
#phApp .ph-btn:disabled { opacity: .5; cursor: not-allowed; }

#phApp .ph-stat {
    max-width: 760px; margin: 18px auto 0; background: var(--c-surface); border: 1px solid var(--c-border);
    border-radius: var(--radius-md); padding: 14px 18px; box-shadow: var(--shadow-md);
    text-align: center; font-size: 14px; line-height: 1.9; color: var(--c-text-sub);
}
#phApp .ph-stat b { color: var(--c-primary); font-size: 17px; }

#phApp .ph-tip { max-width: 760px; margin: 12px auto 0; font-size: 13px; color: var(--c-text-sub); text-align: center; line-height: 1.8; }

#phApp .ph-ai, #phApp .ph-info { max-width: 760px; margin: 30px auto 0; }
#phApp .ph-ai h2, #phApp .ph-info h2 { font-size: 20px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#phApp .ph-ai p { font-size: 14px; color: var(--c-text-sub); line-height: 1.8; margin-bottom: 14px; }
#phApp .ph-ai-row { display: flex; gap: 10px; flex-wrap: wrap; }
#phApp .ph-out {
    margin-top: 14px; background: var(--c-surface-soft); border: 1px solid var(--c-border);
    border-radius: var(--radius-sm); padding: 16px 18px; font-size: 15px; line-height: 1.85;
    color: var(--c-text); white-space: pre-wrap;
}
#phApp .ph-info ul { list-style: disc; padding-left: 22px; margin-bottom: 24px; }
#phApp .ph-info li { font-size: 14px; line-height: 1.9; color: var(--c-text-sub); margin-bottom: 8px; }
#phApp .ph-info li b { color: var(--c-text); }

@media (max-width: 560px) {
    #phApp .ph-hero h1 { font-size: 24px; }
    #phApp .ph-big { font-size: 34px; }
    #phApp .ph-opts { grid-template-columns: 1fr; }
    #phApp .ph-cards { grid-template-columns: repeat(auto-fill, minmax(78px, 1fr)); }
}