@media screen and (max-width: 768px) {

/* ============================================
   钢琴书·深圳调音 - 移动端响应式样式
   适用于屏幕宽度 ≤ 768px
   ============================================ */


/* ---------- 导航栏 ---------- */
.header__nav {
    position: fixed; top: 72px; left: 0; width: 100%;
    background-color: var(--color-white); border-bottom: 1px solid var(--color-border);
    padding: 20px 0; transform: translateY(-110%); opacity: 0;
    transition: all 0.35s ease; z-index: 999;
}
.header__nav--open { transform: translateY(0); opacity: 1; }
.header__menu { flex-direction: column; gap: 0; padding: 0 24px; }
.header__menu li { padding: 12px 0; border-bottom: 1px solid var(--color-border); }
.header__menu li:last-child { border-bottom: none; }
.header__link { display: block; font-size: 16px; border-bottom: none; }
.header__toggle { display: flex; }

.header__toggle--open .header__toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.header__toggle--open .header__toggle-bar:nth-child(2) { opacity: 0; }
.header__toggle--open .header__toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


.header__inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.header__logo { gap: 5px; font-family: var(--font-heading); font-size: 20px; }
.header__logo-icon { 	
    background: url(../images/logo_3.png) no-repeat right center;
	background-size: 25px 25px;
	width: 40px;
	height: 40px; 
}

/* ---------- 首屏 ---------- */
.hero { padding: 48px 0 60px; }
.hero .container { grid-template-columns: 1fr; gap: 40px; text-align: center; }
.hero__title { font-size: 32px; }
.hero__subtitle { font-size: 15px; }
.hero__actions { flex-direction: column; align-items: center; gap: 12px; }
.hero__stats { justify-content: center; gap: 28px; }
.hero__stat-number { font-size: 28px; }
.hero__visual { order: -1; }
.hero__placeholder {
    width: 100%;
    height: auto;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero__placeholder img {
    width: 100%;
    height: auto;
    border-radius: 20px;
}

.hero__floating-card {
    position: absolute; bottom: -30px; left: 0px;
    background: #fff; border-radius: 12px; padding: 5px 22px 5px 18px;
    box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 8px;
    font-size: 15px; font-weight: 500; color: var(--color-primary);
}
.hero__floating-card .hero__floating-icon {
    font-size: 24px; 
}

/* ---------- 区块标题 ---------- */
.section-header { margin-bottom: 36px; }
.section-header__title { font-size: 28px; }
.section-header__subtitle { font-size: 14px; width: 80%; margin: 0 auto; }

/* ---------- 在线预约 ---------- */
.booking { padding: 48px 0; }
.booking__form { padding: 24px 24px 80px 24px; }
.booking__row { grid-template-columns: 1fr; gap: 0; }
.booking__hint { width: 80%; margin:16px 10%; }

/* ---------- 专业服务 ---------- */
.services { padding: 48px 0; }
.services__grid { grid-template-columns: 1fr; gap: 16px; }

/* ---------- 为何选择 ---------- */
.why-us { padding: 48px 0; }
.why-us__intro { font-size: 14px; margin-bottom: 32px; }
.why-us__grid { grid-template-columns: 1fr; gap: 16px; }

/* ---------- 服务范围 ---------- */
.areas { padding: 48px 0; }
.areas__grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }

/* ---------- 服务价格 ---------- */
.pricing { padding: 48px 0; }
.pricing__grid { grid-template-columns: 1fr; gap: 20px; }
.pricing-card { padding: 28px 20px; }

/* ---------- 常见问题 ---------- */
.faq { padding: 48px 0; }
.faq__question { font-size: 15px; }

/* ---------- 页脚 ---------- */
.footer { padding: 40px 0 20px; text-align:center; }
.footer__grid { grid-template-columns: 1fr; gap: 28px; }

.footer__desc img {
	width: 80%;
	padding: 0px 0% 0px 20%;
	text-align: center;
}

/* ---------- 按钮 ---------- */
.btn { padding: 12px 35px; font-size: 18px; }





/* ---------- 小屏手机适配 (< 400px) ---------- */
@media (max-width: 400px) {
    .hero__title { font-size: 26px; }
    .hero__stats { gap: 18px; }
    .hero__stat-number { font-size: 24px; }
    .hero__stat-label { font-size: 12px; }
    .section-header__title { font-size: 24px; }
    .container { padding: 0 16px; }
    .areas__grid { grid-template-columns: repeat(2, 1fr); }
    .pricing__grid { grid-template-columns: 1fr; }
}