/* 本次新增的首页模块与留言表单，限定作用范围以免影响原模板。 */
.xitan-intro,.xitan-benefits,.xitan-message{font-family:"Microsoft YaHei",Arial,sans-serif;box-sizing:border-box}
.xitan-intro *,.xitan-benefits *,.xitan-message *{box-sizing:border-box}
.xitan-intro{color:#fff;background:linear-gradient(120deg,#19463e 0%,#2b7464 57%,#3b9279 100%);padding:80px 3%;overflow:hidden}
.xitan-intro-inner{max-width:1440px;margin:auto;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:6%}
.xitan-intro-copy{min-width:0}.xitan-intro-en{display:block;font-size:clamp(32px,4vw,65px);line-height:1.1;font-weight:700;letter-spacing:.035em;color:rgba(255,255,255,.22)}
.xitan-intro h2{font-size:clamp(27px,3vw,45px);line-height:1.3;margin:9px 0 16px;font-weight:700;color:#fff}
.xitan-rule{display:block;width:78px;height:3px;background:#a6d4b6;margin:0 0 32px}
.xitan-intro-text{font-size:16px;line-height:2.15;color:rgba(255,255,255,.95);max-height:330px;overflow:auto;padding-right:6px}
.xitan-intro-text p{margin:0 0 13px}.xitan-intro-text a{color:#fff;text-decoration:underline}
.xitan-intro-image{width:100%;aspect-ratio:1.6;min-height:280px;overflow:hidden}
.xitan-intro-image img{width:100%;height:100%;object-fit:cover;display:block}
.xitan-benefits{padding:74px 4% 86px;background:#fff;color:#323a37}
.xitan-benefits-heading{text-align:center}.xitan-benefits-heading h2{font-size:clamp(27px,2.5vw,37px);line-height:1.3;color:#263d35;margin:0 0 10px}
.xitan-benefits-heading p{font-size:16px;color:#768780;margin:0}
.xitan-benefits-grid{max-width:1440px;margin:43px auto 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-left:1px solid #e5ede9}
.xitan-benefit{border-right:1px solid #e5ede9;text-align:center;padding:40px 9% 20px;min-height:272px}
.xitan-benefit-icon{display:flex;width:87px;height:87px;border-radius:50%;margin:0 auto 26px;align-items:center;justify-content:center;background:#388b71;border:8px solid #cee7d8;color:white}
.xitan-benefit-icon svg{width:41px;height:41px;fill:none;stroke:currentColor;stroke-width:2.3;stroke-linecap:round;stroke-linejoin:round}
.xitan-benefit h3{font-size:25px;line-height:1.4;margin:0 0 20px;color:#283b33;font-weight:700}.xitan-benefit p{font-size:14px;color:#798880;line-height:1.85;margin:0;white-space:normal;overflow-wrap:anywhere}
.xitan-message{background:#f5f8f6;padding:75px 4% 90px;color:#263a34}.xitan-message-inner{max-width:1000px;margin:auto}
.xitan-message-heading{text-align:center;margin-bottom:34px}.xitan-message-heading h2{font-size:34px;margin:0 0 9px;color:#277961}.xitan-message-heading p{font-size:15px;color:#778880;margin:0}
.xitan-message-form{padding:38px;background:#fff;box-shadow:0 12px 36px rgba(23,66,51,.07)}.xitan-message-form label{display:block;font-size:15px;color:#3d5148;line-height:1.5}
.xitan-message-fields{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-bottom:20px}
.xitan-message-form input,.xitan-message-form textarea{display:block;width:100%;border:1px solid #d9e4dd;border-radius:3px;font:inherit;font-size:15px;color:#263a34;padding:12px 14px;background:#fff;margin-top:8px;outline:none}
.xitan-message-form input:focus,.xitan-message-form textarea:focus{border-color:#2b9080;box-shadow:0 0 0 3px rgba(43,144,128,.1)}
.xitan-message-form textarea{resize:vertical;min-height:125px}.xitan-message-form button{display:inline-block;margin-top:25px;border:0;background:#2b9080;color:#fff;font-size:16px;padding:13px 43px;cursor:pointer;border-radius:3px}.xitan-message-form button:hover{background:#216f62}
.xitan-captcha{display:flex;align-items:center;gap:12px;margin-top:19px}.xitan-captcha input{max-width:165px;margin:0}.xitan-captcha img{height:42px;min-width:100px;object-fit:contain;cursor:pointer}
@media(max-width:900px){.xitan-intro{padding:48px 5%}.xitan-intro-inner{grid-template-columns:1fr;gap:26px}.xitan-intro-image{aspect-ratio:1.8}.xitan-benefits{padding:55px 4%}.xitan-benefits-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.xitan-benefit:nth-child(n+3){border-top:1px solid #e5ede9}.xitan-message-fields{grid-template-columns:1fr;gap:17px}}
@media(max-width:520px){.xitan-intro-text{font-size:14px;line-height:1.9;max-height:none}.xitan-intro-image{min-height:0}.xitan-benefits-grid{margin-top:30px}.xitan-benefit{padding:29px 7% 25px;min-height:220px}.xitan-benefit-icon{width:67px;height:67px;border-width:6px;margin-bottom:17px}.xitan-benefit-icon svg{width:30px;height:30px}.xitan-benefit h3{font-size:19px;margin-bottom:9px}.xitan-benefit p{font-size:12px}.xitan-message{padding:52px 4%}.xitan-message-form{padding:22px}.xitan-message-heading h2{font-size:28px}.xitan-captcha{flex-wrap:wrap}}